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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 21701. Отображено 100.
03-05-2012 дата публикации

Methods and apparatus for wireless microphone synchronization

Номер: US20120106751A1
Автор: Frank A. Lane, Junyi Li, Mathew Scott Corson, Thomas J. Richardson
Принадлежит: Qualcomm Inc

Methods and apparatus related to timing synchronization used in a wireless microphone system to reduce and/or minimize interference are described. A wireless microphone receiver in some embodiments performs open loop timing control based on signals from an adjacent wireless microphone receiver and participates in closed loop timing control of wireless microphone transmitters which communicate with the particular wireless microphone receiver. The closed loop timing control includes instructing individual wireless microphone transmitters to advance or retard their symbol timing so that symbols transmitted by different wireless microphone transmitters are received in a synchronized manner at the wireless microphone receiver. The closed loop timing control allows a wireless microphone receiver to control wireless microphone transmitters to take into consideration their different distances to the receiver and the differing transmission times associated with the wireless microphone transmitters at different locations.

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Номер записи: 1
31-05-2012 дата публикации

Apparatus and method for synchronization between scanning interval and multicast interval in broadband wireless access system

Номер: US20120134312A1
Автор: Gyou-Hwan Kim, Han-Seok Kim, Jun-Hwan Oh, Mi-Ae Wi, Sung-kwan Kim
Принадлежит: SAMSUNG ELECTRONICS CO LTD

Scanning cycle synchronization of a multicast service in a broadband wireless access system is provided. Multicast group information of a multicast group to which a Mobile Station (MS) belongs is received at the MS from an application server. A scanning cycle pattern and a scan offset of a multicast service corresponding to the multicast group are determined. A scanning cycle of the multicast is set according to the scanning cycle pattern and the scan offset. Scanning and reception of multicast data are performed according to the scanning cycle.

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Номер записи: 2
31-05-2012 дата публикации

Air interface synchronization method, apparatus and system

Номер: US20120134455A1
Автор: Chunfeng Cui, Guangyi Liu, Jing Wang
Принадлежит: China Mobile Communications Group Co Ltd

An air interface synchronization method is provided. The method includes that: a home-eNodeB which is not synchronized with an eNodeB, intercepts a synchronization subframe transmitted from the eNodeB and/or the home-eNodeB which was already synchronized with the eNodeB, a synchronization reference base station is selected from the base station which transmits the intercepted synchronization subframe, wherein the synchronization subframe includes a special synchronization channel for broadcasting synchronization sequence; the synchronization sequence is obtained, which is broadcasted in the special synchronization channel of the synchronization subframe transmitted by the synchronization reference station, and the synchronization with the synchronization base station is performed according to the synchronization sequence. Also, an air interface synchronization system, an eNodeB and a home-eNodeB are provided. The problem in prior art that the source is wasted in the process of synchronization is solved according to the method, the system, the eNodeB and the home-eNodeB.

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Номер записи: 3
21-06-2012 дата публикации

Apparatus and method for communicating user equipment specific information in cellular communication system

Номер: US20120155339A1
Автор: Nicholas William Anderson
Принадлежит: Sony Corp

A cellular communication system includes a base station and a plurality of user equipment (UE). The base station includes a combine processor which combines user equipment specific information, such as power control commands or synchronisation information, for a plurality of user equipment. An encode processor encodes the combined user equipment specific information and a transceiver transmits the combined user equipment specific information in a minimum transmission resource unit of the cellular communication system. The minimum transmission resource unit may be a single channelisation code in a single time slot.

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Номер записи: 4
28-06-2012 дата публикации

Sequence generating method for efficient detection and method for transmitting and receiving signals using the same

Номер: US20120163348A1
Автор: Dong Cheol Kim, Hyun Woo Lee, Jin Sam Kwak, Min Seok Noh, Seung Hee Han, Yeong Hyeon Kwon
Принадлежит: LG ELECTRONICS INC

A sequence generation method for allowing a reception end to effectively detect a sequence used for a specific channel of an OFDM communication system, and a signal transmission/reception method using the same are disclosed. During the sequence generation, an index is selected from among the index set having the conjugate symmetry property between indexes, and a specific part corresponding to the frequency “0” is omitted from a transmitted signal. In addition, a reception end can calculate a cross-correlation value between a received (Rx) signal and each sequence using only one cross-correlation calculation based on the conjugate symmetry property.

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Номер записи: 5
19-07-2012 дата публикации

Mobile communication system, mobile station apparatus, base station apparatus, and setting change method

Номер: US20120184320A1
Автор: Masatomo Inoue, Mitsuhiro Tani
Принадлежит: Fujitsu Ltd

In a mobile communication system, a base station apparatus stores setting change information which includes setup information that is changed in accordance with a prescribed event when the prescribed event occurs, timing information that specifies a timing for making a setting change, and trigger information that specifies an action based on which the base station apparatus and a mobile station apparatus compute the setting change timing for the base station apparatus and the mobile station apparatus, respectively; and transmits, in advance of occurrence of the prescribed event, the setting change information to the mobile station apparatus. When the action specified in the trigger information occurs, the mobile station apparatus and the base station apparatus each determine the setting change timing in accordance with the timing information and effect the setting change at the determined timing in accordance with the setup information.

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Номер записи: 6
26-07-2012 дата публикации

Syncronizing wireless devices

Номер: US20120188998A1
Автор: Norbert Philips, Steven Mark Thoen, Thierry G C Walrant, Valentin Claessens
Принадлежит: NXP BV

A method of synchronising the reference clock of a first wireless device with a master reference clock of a second wireless device via a wireless network. The method involves transmitting, from the second wireless device to the first wireless device, a dedicated synchronisation frame via a dedicated synchronisation channel; receiving the dedicated synchronisation frame at the first wireless device; and synchronising the reference clock of the first wireless device with the master reference clock of the second wireless device based on the received dedicated synchronisation frame.

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Номер записи: 7
26-07-2012 дата публикации

Method and apparatus for determining timing information for cells

Номер: US20120190373A1
Автор: Nathan E. Tenny
Принадлежит: Qualcomm Inc

Techniques for determining timing information for cells are disclosed. A user equipment (UE) may communicate with a serving cell and may need to make measurements of other cells, e.g., to support positioning of the UE. Each cell may transmit reference signals based on its timing. Different cells may operate asynchronously or with unknown timing. The UE may send a request for measurement gaps to the serving cell and may include timing information in the request. The timing information may (directly or indirectly) convey relative timing between the serving cell and a reference cell. The serving cell may determine measurement gaps at the proper time for other cells based on the timing information from the UE and may avoid scheduling the UE for data transmission during the measurement gaps. The UE may make measurements of other cells during the measurement gaps, without losing any data from the serving cell.

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Номер записи: 8
16-08-2012 дата публикации

Method and apparatus for adjusting signal transmission starting point of terminal in wireless network

Номер: US20120207146A1
Автор: Hyoung Jin Kwon, Hyun Kyu CHUNG, Kapseok Chang, Sung-Geun Jin, Woo Yong Lee
Принадлежит: Electronics and Telecommunications Research Institute ETRI

Disclosed is a method for adjusting a transmission time point of at least one second terminal in a wireless network by a first terminal. In the method for adjusting a transmission time point of a terminal, a transmission time point of the second terminal is set, a first frame including information regarding the transmission time point is transmitted to the second terminal, a first response frame transmitted according to the transmission time point from the second terminal is received, and the transmission time point is adjusted according to an arrival time of the first response frame.

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Номер записи: 9
04-10-2012 дата публикации

System and method for passively determining own position listening to wireless time synchronization communications

Номер: US20120252503A1
Автор: Ryan Haoyun Wu
Принадлежит: Saab Sensis Corp

The system and method of the present invention provides a mobile node (e.g., target), such as an aircraft, vehicle or mobile piece of equipment, the ability to determine its own position by passively listening to wireless time synchronization communications, such as IEEE 1588 Precision Time Protocol (PTP) messages, exchanged between nodes over a wireless network.

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Номер записи: 10
11-10-2012 дата публикации

Method and apparatus of configuring downlink timing and transmitting random access response in mobile communication system using carrier aggregation

Номер: US20120257569A1
Автор: Jaehyuk JANG, Kyeongin Jeong
Принадлежит: SAMSUNG ELECTRONICS CO LTD

A method of configuring downlink timings and transmitting a random access response message is provided for a random access procedure in a Long Term Evolution (LTE) system supporting carrier aggregation. The method for adjusting timing of a terminal in a wireless communication system supporting carrier aggregation of at least one carrier includes transmitting a Random Access Preamble to a base station, and receiving a Random Access Response with a Timing Advance Command (TAC) for commanding uplink timing adjustment from the base station, wherein the Random Access Response comprises information indicating a Timing Advance Group (TAG) to which the TAC is applied.

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Номер записи: 11
25-10-2012 дата публикации

Methods and apparatus for timing synchronization for peer to peer devices operating in wwan spectrum

Номер: US20120269178A1
Автор: Anand MURALIDHAR, Hua Wang, Junyi Li, Shailesh Patil, Thomas J. Richardson, Xinzhou Wu
Принадлежит: Qualcomm Inc

A method, an apparatus, and a computer program product are provided in which a clock timing is determined for utilizing resources including peer-to-peer resources based on a WWAN downlink receive timing and a WWAN uplink transmit timing. In addition, the clock timing is utilized for peer-to-peer communication with the peer-to-peer resources.

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Номер записи: 12
08-11-2012 дата публикации

Communication method and device

Номер: US20120281599A1
Автор: Guangyi Liu, LU Han, Yuhong Huang
Принадлежит: China Mobile Communications Group Co Ltd

A communication method and device are applicable in a mobile communication system of LTE Type 2 wideband TDD. The method includes: transmitting, by a first communication device, to a second communication device a radio frame, where the radio frame includes a data timeslot for transmitting data, an uplink special timeslot and a downlink special timeslot for carrying synchronizing information, and the data timeslot is shorter than an original data timeslot by a first timeslot, and at least part of the first timeslot is located at the downlink special timeslot.

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Номер записи: 13
22-11-2012 дата публикации

Preamble configuring method in the wireless lan system, and a method for a frame synchronization

Номер: US20120294296A1
Автор: Sok-Kyu Lee, Woo-Yong Lee
Принадлежит: Electronics and Telecommunications Research Institute ETRI

A method of configuring a preamble of a downlink frame for synchronization in data frame transmission of a 60 GHz a wireless local area network system, the method comprising arranging a short preamble having a plurality of repetitive S symbols, and an IS symbol, and arranging a long preamble having a long cyclic prefix (CP) and a plurality of L symbols for frame synchronization and symbol timing by performing auto-correlation according to the length of window of the auto-correlation.

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Номер записи: 14
29-11-2012 дата публикации

Method, System, and Apparatus for Coexistence of Plurality of Communication Technologies in Communication Device

Номер: US20120302285A1
Автор: Murali Padmanabhan, Vijay Khairmode
Принадлежит: Broadcom Corp

A method and system for enabling coexistence of a plurality of communication technologies in a communication device is provided. The method includes determining a time offset between a first communication event of a first communication technology of the plurality of communication technologies and a second communication event of a second communication technology of the plurality of communication technologies. The method further includes altering a first communication state of one or more of the first communication technology and the second communication technology to a second communication state based on one or more of the time offset and a plurality of parameters of one or more of the first communication technology and the second communication technology.

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Номер записи: 15
06-12-2012 дата публикации

Methods and apparatus to transmit and receive synchronization signal and system information in a wireless communication system

Номер: US20120307726A1
Автор: Farooq Khan, Ying Li, Zhouyue Pi
Принадлежит: SAMSUNG ELECTRONICS CO LTD

A base station transmits a plurality of primary synchronization channel (PSC) symbols to a mobile station in a slot of a subframe of a frame-based wireless communication system. The base station also transmits a plurality of secondary synchronization channel (SSC) symbols to the mobile station in the slot of the subframe. The mobile station determines a preferred receiver beam based on the plurality of received consecutive PSC symbols.

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Номер записи: 16
10-01-2013 дата публикации

Method and System for Reduced System-Time Overhead Parameter Length Representation for Inter-Radio Access Technology Communication

Номер: US20130010757A1
Автор: Eric W. Parsons, Ke-Chi Jang, Larry T. Bolen
Принадлежит: Research in Motion Ltd

A wireless access terminal, system and method for the wireless access terminal to synchronize to system times in a wireless communication system. A first timing hierarchy in a first wireless communication network is used to operate the wireless access terminal The lint wireless communication network has a first radio access technology. Operating with the first timing hierarchy includes determining a frame cycle for the first wireless communication network. The frame cycle has a frame cycle boundary. Broadcast parameters for a second wireless communication network having a second radio access technology different from the first radio access technology are received. The broadcast parameters include the system time of the second wireless communication network. The system time of second wireless communication network is aligned, from the perspective of the wireless access terminal, with the frame cycle boundary. The wireless access terminal engages in a communication session using the second wireless communication network.

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Номер записи: 17
17-01-2013 дата публикации

Mobile station and transmission control method

Номер: US20130016656A1
Автор: Hideyori Satou
Принадлежит: Fujitsu Ltd

A mobile station includes: a determining unit configured to make a determination as to whether uplink synchronization is established with a base station; a controller configured to determine a timing for providing notification of a start of data transmission to the base station based on a result of a determination; and a transmitting unit configured to provide the notification of the start of data transmission to the base station at the timing.

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Номер записи: 18
14-02-2013 дата публикации

Method and System for Signaling in a Heterogeneous Network

Номер: US20130039268A1
Автор: Chandra Sekhar Bontu, Yi Song, YI Yu, Youn Hyoung Heo, Yufei Wu Blankenship, Zhijun Cai
Принадлежит: Research in Motion Ltd

A method at a network element operating in a wireless network, wherein the network element is configured to transmit a default cell search signal at a default position in one or more subframes, the method comprising transmitting, by the network element, an auxiliary cell search signal in addition to the default cell search signal.

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Номер записи: 19
21-03-2013 дата публикации

DATA TRANSCEIVER AND DATA-TRANSCEIVING METHOD FOR BIO-IMPLANTABLE MEDICAL DEVICES

Номер: US20130070616A1
Автор: Kim Sung June, Lee Hoseung, Park Se-Ik
Принадлежит: M.I. TECH CO., LTD.

The invention relates a transmitter for transmitting data in bio-implantable medical devices, comprising: an activation unit which transmits; to a receiver, a predetermined number of frame bits which indicate the start of data transmission so as to activate the receiver; a preamble state notification unit which transmits, at the state where the receiver is activated or during data transmission to the receiver, a preamble data signal for turning the receiver into a preamble state; and a synchronization unit which transmits synchronization data for synchronization between the transmitter and the receiver in the preamble state. 1. A transmitter for transmitting data in an implantable medical device , the transmitter comprising:an activation unit configured to transmit a predetermined number of frame bits to a receiver to activate the receiver, the frame bits indicating transmission start of the data;a preamble state notification unit configured to transmit a preamble data signal for putting the receiver in a preamble state when the receiver has been activated or the data is being transmitted to the receiver; anda synchronization unit configured to transmit synchronization data for synchronization between the transmitter and the receiver in the preamble state.2. The transmitter of claim 1 , further comprising a transmission end notification unit configured to transmit a communication end signal for notifying the receiver of end of data transmission when the data is being transmitted to the receiver or the receiver is in the preamble state.3. The transmitter of claim 2 , wherein the communication end signal includes a combination of one frame bit and one logic high signal.4. The transmitter of claim 1 , wherein the synchronization unit is configured to add synchronization data to the preamble data signal at predetermined intervals and transmit it to the receiver claim 1 , in order for resynchronization between the transmitter and the receiver.5. The transmitter of claim ...

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Номер записи: 20
21-03-2013 дата публикации

Method And Arrangement In A Wireless Communication System

Номер: US20130070726A1
Автор: Chunhui Zhang, Jacob ÖSTERLING, Youping Su
Принадлежит: Individual

The present invention relates to a method and a device for time synchronization of an RBS which has lost its GPS signal. The method in the time synchronization device comprises retrieving from the first radio base station a first timing advance value ( 710 ) used by the user equipment to adjust its transmission timing before the handover, and a measurement of a reception timing ( 720 ) of a random access preamble. The random access preamble is transmitted from the user equipment to the second radio base station during synchronization. The method also comprises retrieving ( 730 ) from the second radio base station a second timing advance value used by the user equipment to adjust its transmission timing after the handover, and determining ( 740 ) a time synchronization offset between the first and second radio base station based on the retrieved first timing advance value, the second timing advance value, and the measurement of the reception timing.

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Номер записи: 21
28-03-2013 дата публикации

METHOD AND TERMINAL FOR DIRECT COMMUNICATION BETWEEN TERMINALS

Номер: US20130077512A1
Автор: Chang Sung Cheol, Kim Eunkyung, Kim Seokki, KIM Sung Kyung, Kim Won-Ik, Lim Kwang Jae, Yoon Chul Sik, Yun Mi-Young
Принадлежит:

A direct communication method between terminals is provided. When a terminal receives a plurality of synchronization information parts, the terminal selects synchronization information to acquire a reference time among the plurality of synchronization information parts according to a priority. Here, the priority is an order of first synchronization information that is received from a base station, second synchronization information that is received from a global positioning system (GPS), and third synchronization information that is received from a terminal in which a hop count from the base station or the GPS is small. 1. A method of communicating with a terminal , the method comprising:receiving a plurality of synchronization information parts;selecting synchronization information to acquire a reference time among a plurality of synchronization information parts according to a priority; andacquiring the reference time through the acquired synchronization information,wherein the priority is an order of a first synchronization information that is received from a base station, a second synchronization information that is received from a global positioning system (GPS), and a third synchronization information that is received from a terminal in which a hop count from the base station or the GPS is small.2. The method of claim 1 , wherein the third synchronization information is synchronization information that is received from a terminal having high received signal strength when the hop counts are the same.3. The method of claim 1 , wherein a next order of the third synchronization information is fourth synchronization information that is received from a terminal having a small hop count among synchronization information comprising a reference time that the terminal randomly selects.4. The method of claim 1 , wherein a next order of the third synchronization information is fourth synchronization information that is received from a terminal having large received signal ...

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Номер записи: 22
28-03-2013 дата публикации

System access method and apparatus of a narrowband terminal in a wireless communication system supporting wideband and narrowband terminals

Номер: US20130077582A1
Автор: Joonyoung Cho, Juho Lee, Youngbum Kim
Принадлежит: SAMSUNG ELECTRONICS CO LTD

A system access method of a narrowband terminal is provided for supporting both wideband and narrowband terminals in a cellular radio communication system. The method includes broadcasting a Shared CHannel (SCH) for a terminal to acquire system synchronization; transmitting a Low-end Master Information Block (L-MIB) including control information on an L-subframe configuration for supporting a second type terminal and a sub-band configuration of the L-subframe; transmitting a Low-end System Information Block (L-SIB) including information on downlink reception and uplink transmission of the second type terminal; and performing a random access procedure, when an attach request is received from one of the first type terminals and the second type terminals.

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Номер записи: 23
04-04-2013 дата публикации

METHOD OF UPDATING A TIME SYNCHRONIZATION REFERENCE

Номер: US20130083791A1
Автор: Bourgart Fabrice, Jobert Sebastien
Принадлежит: FRANCE TELECOM

A method and apparatus are provided for updating a temporal synchronization reference exchanged between a first item of equipment and at least one second item of equipment belonging to a communication network. The method includes the following steps implemented by one of the two items of equipment: a step of receiving a traceability cue relating to a frequency-synchronization reference; a step of determining the periodicity of updating of the temporal synchronization reference as a function of said traceability cue received. The updating makes it possible to maintain the temporal synchronization reference of the second item of equipment. 1. An updating method for updating a time synchronization reference exchanged between a first piece of equipment and at least one second piece of equipment forming parts of a communications network , the method comprising the following steps performed by one of the pieces of equipment:a reception step of receiving traceability information relating to a frequency synchronization reference; anda determination step of determining a periodicity for updating the time synchronization reference as a function of said received traceability information, said updating enabling the time synchronization reference of the second piece of equipment to be maintained.2. The updating method according to claim 1 , wherein the traceability information is sent by the second piece of equipment to the first piece of equipment.3. The updating method according to claim 1 , in which the reception and determination steps are performed by the second piece of equipment claim 1 , said method also including a step of the second piece of equipment transmitting a message to the first piece of equipment claim 1 , the message including the periodicity for updating the time synchronization reference.4. The updating method according to claim 1 , wherein the reception and determination steps are performed by the first piece of equipment claim 1 , said method further ...

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Номер записи: 24
25-04-2013 дата публикации

Apparatus and method for providing multi-antenna scheme in wireless communication system

Номер: US20130100992A1
Автор: Austin Kim, Gyu-Bok PARK, Joon-Ho Byun, Se-hyun Park
Принадлежит: SAMSUNG ELECTRONICS CO LTD

Provided are an apparatus and method for providing a multi-antenna scheme in a wireless communication system by using a plurality of terminals. In a downlink receiving scheme at a mobile terminal, a terminal group is established comprising the mobile terminal and at least one adjacent terminal The mobile terminal receives a first signal from a base station, and at least one second signal through a short-range communication network from the at least one adjacent terminal The at least one second signal is representative of the first signal transmitted from the base station as received at the at least one adjacent terminal A received signal is detected as an antenna array signal on the basis of the first and at least one second signals. A similar scheme may be used for uplink transmissions, in which a virtual antenna array is established with a terminal group for transmitting uplink.

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Номер записи: 25
09-05-2013 дата публикации

BASE STATION DEVICE, INTER-BASE-STATION SYNCHRONIZATION METHOD, DATA STRUCTURE OF SYNCHRONIZATION INFORMATION, AND DATA STRUCTURE OF SYNCHRONIZATION REQUEST

Номер: US20130114512A1
Автор: Yamamoto Takashi
Принадлежит: Sumitomo Electric Industries, Ltd.

A base station device includes a transmission unit which transmits, via an X2 interface a synchronization request that requests another base station device to achieve inter-base-station synchronization with the base station device; and a reception unit which receives synchronization information relating to the synchronization state of inter-base-station synchronization, which information is transmitted from the another base station device via the X2 interface 1. A base station device , including:a reception unit which receives, via an inter-base-station communication interface that enables inter-base-station communication, synchronization information relating to a synchronization state of inter-base-station synchronization, the synchronization information being transmitted from another base station device.2. The base station device according to claim 1 , further including:a transmission unit which transmits, via the inter-base-station communication interface, a synchronization request that requests the another base station device to achieve inter-base-station synchronization with the base station device.3. The base station device according to claim 2 , wherein the synchronization request includes an amount of timing offset of a communication timing to be adjusted by the another base station device.4. The base station device according to claim 1 , wherein the synchronization information includes a clock synchronization target with which the another base station device synchronizes its own internal clock.5. The base station device according to claim 1 , wherein the synchronization information includes an amount of timing offset between a communication timing of the base station device and a communication timing of the another base station device.6. The base station device according to claim 2 , further including:a detection unit which detects for, among terminal devices connected to the base station device, a terminal device that is located so close to the another ...

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Номер записи: 26
16-05-2013 дата публикации

Multi-Stage Timing and Frequency Synchronization

Номер: US20130121246A1
Автор: Cheng Jung-Fu, Guey Jiann-Ching, KOORAPATY Havish
Принадлежит:

According to exemplary embodiments of the invention, timing and frequency offset estimation is divided into two or more stages. In each stage, a different subset of the available reference symbols is selected to perform timing synchronization, frequency synchronization, or joint timing and frequency synchronization. In each non-final stage, a respective set of the reference symbols is used to perform timing synchronization or frequency synchronization in order to narrow the uncertainty window for the timing or frequency offset, and thus reduce the search space for the final stage. In the final stage, a different set of reference symbols may be used to perform joint timing and frequency synchronization over the reduced search space. 1. A method of synchronizing a receiving device with a transmitting device in a wireless communication network , said method comprising:receiving one or more reference signals transmitted by the transmitting device to the receiving device;reducing a search space for timing and frequency offsets by performing timing offset estimation based on a first set of reference symbols selected from said one or more reference signals, or performing frequency offset estimation based on a second set of reference symbols selected from said one or more reference signals, or both; andperforming joint timing and frequency offset estimation over said reduced search space using a third set of reference symbols selected from said one or more reference signals to obtain estimates of said timing and frequency offsets.2. The method of wherein reducing said search space for timing and frequency offsets comprises reducing said search space in a time domain by performing timing offset estimation using said first set of reference symbols to obtain said reduced search space.3. The method of wherein performing timing offset estimation using said first set of reference symbols comprises performing timing offset estimation using reference symbols selected from one or ...

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Номер записи: 27
16-05-2013 дата публикации

Timing adjustment method, user equipment, base station, and mobile communication system

Номер: US20130121254A1
Автор: Kazuhisa Obuchi, Yoshiaki Ohta, Yoshiharu Tajima, Yutaka Kobayashi
Принадлежит: Fujitsu Ltd

A mobile communication system having a user equipment that performs transmission process having transmission timing adjustment information and a base station that receives a signal sent from the user equipment, the mobile communication system includes, if a timer controlling a term of application of first transmission timing adjustment information expires before transmission of a signal including identification information of the user equipment is performed during a connection process including reception of second transmission timing adjustment information while the user equipment has the first transmission timing adjustment information and performing the connection process to the base station, the user equipment does not transmit the signal.

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Номер записи: 28
16-05-2013 дата публикации

Uplink Synchronization Processing

Номер: US20130121315A1
Автор: Huss Fredrik, LANGEREIS Alexander
Принадлежит: Telefonaktiebolaget lM Ericsson (publ)

Uplink synchronization of user equipment, UE, () served by a radio base station, RBS, () is enabled by triggering (re)start of timing alignment, TA, timer () in response to a first TA command. Uplink timing of data received from the UE () during a measuring time window () constituting a defined sub-interval of a time interval () of the TA timer () is measured and employed for determining a timing advance for the UE (). Transmission of a second TA command comprising a notification of the timing advance is co-scheduled together with a scheduled downlink data transmission to the UE () during a following scheduling time window () constituting a defined sub-interval of the time interval (). The number of TA commands that are scheduled by themselves are minimized to free radio resources and increase the downlink throughput. 123-. (canceled)24. A method of enabling uplink synchronization of user equipment present in a cell served by a radio base station , said method comprising:transmitting a first timing alignment command to said user equipment triggering, based on said first timing alignment command, start of a timing alignment timer with an associated time interval;measuring uplink timing of uplink data received from said user equipment during a measuring time window constituting a defined sub-interval of said time interval, wherein no timing alignment command is transmitted to said user equipment during said measuring time window;determining, based on said measured uplink timing, a timing advance for said user equipment;co-scheduling transmission of a second timing alignment command comprising a notification of said timing advance with a scheduled downlink data transmission to said user equipment during a following scheduling time window constituting a defined sub-interval of said time interval; andco-transmitting said second timing alignment command and said downlink data to said user equipment during said scheduling time window.25. The method according to claim 24 , ...

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Номер записи: 29
16-05-2013 дата публикации

METHOD AND APPARATUS FOR TIME AND FREQUENCY TRACKING IN CLUSTERED FEMTOCELL DEPLOYMENTS

Номер: US20130122917A1
Автор: Esteves Eduardo S., Patel Chirag Sureshbhai, Yavuz Mehmet
Принадлежит: QUALCOMM INCORPORATED

Methods and apparatuses are provided for synchronizing timing or frequency of a femto node in a cluster. A femto node can determine that one or more synchronization signals are associated with a master femto node in a cluster of femto nodes, where femto nodes are to synchronize timing or frequency to the master femto node. The femto node can obtain timing or frequency information from the one or more synchronization signals and synchronize a local timing or a local frequency based at least in part on the timing or frequency information. 1. A method for synchronizing timing or frequency of a femto node in a cluster , comprising:determining that one or more synchronization signals are associated with a master femto node in a cluster of femto nodes;obtaining timing or frequency information from the one or more synchronization signals; andsynchronizing a local timing or a local frequency based at least in part on the timing or frequency information.2. The method of claim 1 , further comprising receiving the one or more synchronization signals using an embedded network listening module (NLM).3. The method of claim 2 , further comprising tuning the NLM to a frequency to receive the one or more synchronization signals based on receiving information associating the frequency to the master femto node.4. The method of claim 1 , further comprising receiving an identity of the master femto node in a configuration or over a backhaul link from the master femto node claim 1 , wherein the determining the one or more synchronization signals is based in part on detecting the identity in the one or more synchronization signals.5. The method of claim 1 , further comprising tracking the local timing or the local frequency based in part on one or more additional received signals.6. The method of claim 5 , wherein the one or more additional received signals comprise timing/frequency difference signals received from a UE that indicate a difference between the local timing or the local ...

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Номер записи: 30
30-05-2013 дата публикации

Base Station Aided Synchronization

Номер: US20130136057A1
Автор: Lin Jie Zhen, Skov Peter, Szufarska Agnieszka, Yao Chun Hai, Zhao Dong
Принадлежит:

An apparatus, method and computer program product include requesting a physical identifier of a communication base station having a preset hierarchical distance to a communication core network from a first communication base station having a higher hierarchical distance than the preset hierarchical distance, based on a connection on one of an interface between a communication base station having a higher hierarchical distance than the preset hierarchical distance and the communication core network and an interface between two communication base stations both having a higher hierarchical distance than the preset hierarchical distance. Prior to the requesting, an initial synchronization with a neighbor base station can be established. After the requesting, an accurate synchronization with the overly base station based on the obtained physical identifier can be established. 1. An apparatus , comprising:identifier obtaining means configured to request a physical identifier of a communication base station having a preset hierarchical distance to a communication core network from a first communication base station having a higher hierarchical distance than the preset hierarchical distance, based on a connection on one of an interface between a communication base station having a higher hierarchical distance than the preset hierarchical distance and the communication core network and an interface between two communication base stations both having a higher hierarchical distance than the preset hierarchical distance.2. The apparatus according to claim 1 , further comprising: synchronization means configured to trace a common reference signal of the communication base station having the preset hierarchical distance and to synchronize a communication configuration with any communication base station.3. The apparatus according to claim 1 , further comprising:selection means configured to select a second communication base station having a higher hierarchical distance than the ...

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Номер записи: 31
06-06-2013 дата публикации

METHOD AND APPARATUS FOR ADJACENT-CHANNEL EMISSION LIMIT DEPENDING ON SYNCHRONIZATION OF INTERFERED RECEIVER

Номер: US20130142177A1
Автор: Nentwig Markus
Принадлежит: Nokia Corporation

In accordance with an example embodiment of the present invention, an apparatus comprises a transceiver configured to receive a transmission from a radio node, the transmission including a synchronization signal; a processor configured to determine a state of synchronization with the radio node and based at least in part on the state of synchronization adjusting at least one transmission parameter. 125-. (canceled)26. An apparatus , comprising:a transceiver configured to receive a transmission from a radio node, the transmission including a synchronization signal; and determine a state of synchronization with the radio node; and', 'based at least in part on the state of synchronization adjust at least one transmission parameter to control a leakage to the radio node., 'a processor configured to27. The apparatus according to claim 26 , wherein the synchronization signal is at least one of a reservation signal claim 26 , a pilot signal claim 26 , a preamble claim 26 , a synchronization sequence claim 26 , a power envelope and a predefined waveform.28. The apparatus according to claim 26 , wherein the synchronization signal comprises a message used in a closed-loop synchronization scheme.29. The apparatus according to wherein the apparatus is further configured to determine the state of synchronization with the radio node based on:a reception instant for the synchronization signal;an offset relative to a frame timing;a comparison of the offset to a threshold; anda determination of a radio node state as synchronized if the offset is less than or equal to the threshold.30. The apparatus according to wherein a synchronized radio node is not configured to adjust the transmission parameters to account for sinc leakage.31. The apparatus according wherein a synchronized radio node is configured to adjust the transmission parameters to result in increase of a level of unwanted emissions.32. The apparatus according to wherein an unsynchronized radio node is configured to adjust ...

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Номер записи: 32
27-06-2013 дата публикации

METHOD AND DEVICE FOR SYNCHRONIZATION IN WIRELESS NETWORKS

Номер: US20130163503A1
Автор: Altshuler Mark, Lavi Nadav, Matinchenko Oleg, Shousterman Leonid
Принадлежит: SPARKMOTION INC.

A method and device are provided for synchronizing data transmission of multicasting/broadcasting services (MBS) by a plurality of Base Stations. Meanwhile, each of the Base Stations receives the MBS data to be transmitted and determines whether any of the MBS data has not been properly received. If so, the respective Base Station may initiate a process to recover the missing MBS data and/or to obtain information regarding the missing data to determine the duration of the time period that would have been required for transmitting the missing MBS. If the missing data has not been timely recovered, the respective Base Station determines a starting point and the duration of a silence period based on the information obtained, and refrains from transmitting signals along a communication channel allocated for transmission of MBS data, during that silence period. 1. A method of synchronizing multicast/broadcast transmission of data from a first and a second base station operating in a wireless communications network comprising:(a) at the first and second base station, receiving, processing and mapping synchronously a flow of multicast/broadcast service (MBS) data packets to a radio frame after a distribution of data period, wherein processing the MBS data packets includes identifying faulty data packets;(b) whenever a faulty data packet is identified at the first base station base station, determining the length of the faulty data packet and ceasing mapping of the MBS data packets to the radio frame for a silence period corresponding to the length of the faulty data packet;(c) after the silence period, and on receipt of synchronization information, resuming mapping of the MBS data packets to the radio frame and transmitting the radio frame from the first base station in synchronism with the radio frame transmitted from the second base station.2. A method as in claim 1 , wherein the synchronization information is received in a synchronization frame which is multicast/ ...

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Номер записи: 33
11-07-2013 дата публикации

LONG TERM EVOLUTON (LTE) USER EQUIPMENT RELAYS HAVING A LICENSED WIRELESS OR WIRED BACKHAUL LINK AND AN UNLICENSED ACCESS LINK

Номер: US20130176934A1
Автор: Damnjanovic Aleksandar, Horn Gavin B., Malladi Durga Prasad, Wei Yongbin
Принадлежит: QUALCOMM INCORPORATED

Certain aspects of the present disclosure provide methods and apparatus for employing relaying devices, such as Long Term Evolution (LTE) user equipment (UE) relays, having a licensed wireless or wired backhaul link and an unlicensed access link. One method generally includes receiving, at a first device, data from a first apparatus via a first carrier frequency in a licensed spectrum, wherein the first device comprises a relaying device, and relaying the data to a second apparatus via a second carrier frequency in an unlicensed spectrum. In this manner, wireless communication systems with relaying devices may achieve better spectral efficiency in unlicensed access links. 1. A method for wireless communications , comprising:receiving, at a first device, data from a first apparatus via a first carrier frequency in a licensed spectrum, wherein the first device comprises a relaying device;synchronizing the first device and a second device; andrelaying the data to a second apparatus via a second carrier frequency in an unlicensed spectrum, based on the synchronization.2. The method of claim 1 , wherein the first device comprises a user equipment (UE) functioning as a relay.3. The method of claim 1 , further comprising:receiving, at the first device, other data from the second apparatus via the second carrier frequency in the unlicensed spectrum; andrelaying the other data to the first apparatus via the first carrier frequency in the licensed spectrum.4. The method of claim 1 , wherein the first and second devices are associated with the same operator and wherein the synchronizing comprises deriving timing from the first apparatus claim 1 , such that the first and second devices are synchronized to the first apparatus.5. The method of claim 1 , wherein the first device is associated with a first operator claim 1 , wherein the second device is associated with a second operator different from the first operator claim 1 , and wherein the synchronizing comprises:scanning the ...

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Номер записи: 34
11-07-2013 дата публикации

Air-Interface Timing Synchronization Sharing

Номер: US20130176997A1
Автор: Feng Li, Huaisong Zhu, Jingyue Nie, LEI XIAO, Yang Tian
Принадлежит: Telefonaktiebolaget LM Ericsson AB

The invention discloses a timing synchronization method in a User Equipment (UE) which is served in a first cell of a first synchronous communication network and also located in a second cell of a second synchronous communication network. The method comprises receiving a message from a communication node of the first network, the message including clock offsets of the first cell and the second cell or timing difference there between, and calculating downlink synchronization of the second cell from downlink synchronization of the first cell and the clock offsets/timing difference.

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Номер записи: 35
18-07-2013 дата публикации

APPARATUS AND METHOD FOR CONTROLLING SECONDARY CELL UPLINK SYNCHRONIZATION STATES

Номер: US20130182687A1
Автор: JEONG Kyeongin, KIM Soenghun, Lieshout Gerardus Johannes Petrus van, Ng Boon Loong, Zhang Jianzhong
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A user equipment (UE) is configured to perform a method for controlling synchronization with a secondary cell (SCell). The method includes receiving a physical downlink control channel (PDCCH) order from an eNodeB associated with an SCell. The method also includes, in response to receiving the PDCCH order, transitioning from a first state where the UE considers the SCell in sync for an uplink transmission to a second state where the UE considers the SCell out of sync for the uplink transmission. 1. For use in a user equipment (UE) , a method for controlling synchronization with a secondary cell (SCell) , the method comprising:receiving a physical downlink control channel (PDCCH) order from an eNodeB associated with a SCell; andin response to receiving the PDCCH order, transitioning from a first state where the UE considers the SCell in sync for an uplink transmission to a second state where the UE considers the SCell out of sync for the uplink transmission.2. The method of claim 1 , wherein the PDCCH order comprises an order to initiate a random access procedure between the UE and the SCell.3. The method of claim 1 , wherein in both the first and second states claim 1 , the UE considers the SCell to be activated.4. The method of claim 1 , wherein in the first state a timeAlignmentTimer for the SCell is running.5. The method of claim 1 , wherein in the second state a timeAlignmentTimer for the SCell is not running.6. A user equipment (UE) configured to control synchronization with a secondary cell (SCell) claim 1 , the UE comprising: 'receive a physical downlink control channel (PDCCH) order from an eNodeB associated with a SCell; and', 'a processor configured toin response to receiving the PDCCH order, transition the UE from a first state where the UE considers the SCell in sync for an uplink transmission to a second state where the UE considers the SCell out of sync for the uplink transmission.7. The UE of claim 6 , wherein the PDCCH order comprises an order to ...

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Номер записи: 36
18-07-2013 дата публикации

WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD

Номер: US20130182699A1
Автор: Horiike Yoshio, Watanabe Takashi, Yamamoto Masahiro
Принадлежит: Panasonic Corporation

There is provided a wireless communication apparatus for conducting communication between a high-order apparatus and a low-order apparatus, including a beacon reception unit and a beacon transmission unit. The beacon reception unit receives a first regular beacon signal () transmitted from the high-order apparatus. The beacon transmission unit transmits a second regular beacon signal () synchronizing a clock of the low-order apparatus to the low-order apparatus in a case where the beacon reception unit receives the first regular beacon signal (). The beacon transmission unit transmits a temporary beacon signal () indicating that the clock of a local station is not able to be synchronized with a clock of the high-order apparatus, to the low-order apparatus, in a case where the beacon reception unit is not able to receive the first regular beacon signal (). 1. A wireless communication apparatus conducting communication between a high-order apparatus and a low-order apparatus , the wireless communication apparatus comprising:a beacon reception unit receiving a first regular beacon signal transmitted from the high-order apparatus; anda beacon transmission unit transmitting a second regular beacon signal synchronizing a clock of the low-order apparatus to the low-order apparatus in a case where the beacon reception unit receives the first regular beacon signal, and transmitting a temporary beacon signal indicating that a clock of the wireless communication apparatus is not able to be synchronized with a clock of the high-order apparatus, to the low-order apparatus, in a case where the beacon reception unit is not able to receive the first regular beacon signal.2. The wireless communication apparatus of claim 1 ,wherein the beacon transmission unit transmits the temporary beacon signal, based on the clock of the wireless communication apparatus, at a timing when the second regular beacon signal is transmitted.3. The wireless communication apparatus of claim 1 ,wherein the ...

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Номер записи: 37
18-07-2013 дата публикации

GROUP FORMATION WITHIN A SYNCHRONIZED HIERARCHY OF PEER-TO-PEER DEVICES

Номер: US20130185373A1
Автор: Hartman Christiaan A., Vandwalle Pierre B.
Принадлежит: Apple Inc.

A system, apparatus and method for organizing devices in a peer-to-peer communication environment. A number of devices synchronize among themselves and select masters (or synchronization stations) to organize the devices into a hierarchy. Master devices have associated preference values reflecting their preference or suitability to be a master device, and broadcast synchronization frames to keep devices synchronized. When multiple devices in one or more hierarchies execute a common application or service, they form a private group to exchange or share data (e.g., play a game, transfer a file). All devices in the hierarchy maintain and advertise a public or default identifier of the hierarchy, and all devices in the private group maintain and advertise a private identifier specific to the group. Members of the group synchronize under a top group master (or root sync station), which synchronizes with a master that is part of the hierarchy. 1. A device for participating in a peer-to-peer network of multiple communication devices , the device comprising:a processor; a default identifier identifying a default hierarchy encompassing the multiple devices; and', 'a group identifier identifying a group hierarchy encompassing a subset of the multiple devices; and, 'a memory configured to store identifiers of one or more device hierarchies that comprise the device, includinga wireless transceiver for conducting wireless communications; broadcast the default identifier and the group identifier;', 'identify one or more sync stations, including a group root sync station, among the subset of the multiple devices;', 'synchronize with one of the one or more sync stations if the device is not selected as the group root sync station; and', 'if the device is selected as the group root sync station, synchronize with a default sync station in the default hierarchy., 'wherein the processor and the wireless transceiver are configured to2. The device of claim 1 , wherein the processor and ...

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Номер записи: 38
25-07-2013 дата публикации

Time Alignment Timer in Multicarrier Communications

Номер: US20130188617A1
Автор: Dinan Esmael Hejazi
Принадлежит:

A wireless device is configured with a primary cell group and a secondary cell group. When a first time alignment timer of the primary cell group expires, for each cell in the wireless device, the wireless device stops uplink transmission of HARQ feedback, uplink transport blocks, and channel state information. When a second time alignment timer of the secondary cell group expires and the first time alignment timer is running, for each activated cell in the secondary cell group, the wireless device stops transmission of uplink transport blocks, and continues transmission of HARQ feedback and channel state information. 1. A method comprising: i) configuration of a plurality of cells comprising a primary cell and at least one secondary cell;', (1) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising said primary cell; and', '(2) a secondary cell group comprising a second subset of said at least one secondary cell; and, 'ii) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising, (1) out-of-sync in response to said time alignment timer being expired or not running; and', '(2) in-sync in response to said time alignment timer running;, 'iii) configuration of a time alignment timer for each of said plurality of cell groups, said time alignment timer starting or restarting in response to said wireless device receiving a timing advance command to adjust uplink transmission timing of a commanded cell group in said plurality of cell groups, said commanded cell group considered], 'a) receiving, by a wireless device, at least one control message from a base station, said at least one control message causing in said wireless device i) stopping uplink transmission of HARQ feedback;', 'ii) stopping re-transmissions of uplink transport blocks in response to downlink HARQ feedback;', 'iii) stopping uplink transmissions comprising transport block ...

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Номер записи: 39
25-07-2013 дата публикации

Synchronization in Base Stations and Wireless Networks

Номер: US20130188618A1
Автор: Dinan Esmael Hejazi
Принадлежит:

A base station transmits subframes of downlink carriers in a primary cell group and downlink carriers in a secondary cell group in substantial time alignment with each other. A wireless device transmits subframes of uplink carriers in the primary cell group in substantially time alignment with each other. The wireless device transmits subframes of uplink carriers in the secondary cell group in substantially time alignment with each other. The subframes transmission timing for uplink carriers in the primary cell group and in the secondary cell group employ different synchronization signals as a timing reference and different timing advance commands. 1. A method comprising: i) configuration of a plurality of cells comprising a primary cell and at least one secondary cell; and', (1) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising said primary cell, uplink transmissions by said wireless device in said primary cell group employing a first synchronization signal transmitted on said primary cell as a primary timing reference; and', '(2) a secondary cell group comprising a second subset of said at least one secondary cell, said second subset comprising a reference secondary cell, uplink transmissions in said secondary cell group employing a second synchronization signal on said reference secondary cell as a secondary timing reference; and, 'ii) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising], 'a) transmitting, by a base station in a plurality of base stations, at least one first control message to a wireless device, said at least one first control message configured to cause in said wireless device i) a time adjustment value; and', 'ii) an index identifying a cell group; and, 'b) transmitting, by said base station, a plurality of timing advance commands to said wireless device, each of said plurality of timing advance ...

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Номер записи: 40
25-07-2013 дата публикации

Secondary Cell Sounding Transmission

Номер: US20130188619A1
Автор: Dinan Esmael Hejazi
Принадлежит:

A wireless device receives message(s) configuring transmissions of sounding reference signals on a secondary cell in a secondary cell group. The wireless device receives an activation command to activate the secondary cell. The wireless device transmits the sounding reference signals if the secondary cell is activated, a timing advance command is applied to the secondary cell group, and a time alignment timer for the secondary cell group is running. The wireless device is configured to not transmit the sounding reference signals on the secondary cell during the period between receiving the activation command and applying the timing advance command. 1. A method comprising: i) configuration of a plurality of cells comprising a primary cell and at least one secondary cell;', (1) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising said primary cell, uplink transmissions by said wireless device in said primary cell group employing a first synchronization signal transmitted on said primary cell as a primary timing reference; and', '(2) a secondary cell group comprising a second subset of said at least one secondary cell; and, 'ii) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising, 'iii) configuration of transmissions of sounding reference signals on a secondary cell in said secondary cell group;, 'a) receiving, by a wireless device, at least one control message from a base station, said at least one control message causing in said wireless deviceb) receiving, by said wireless device, an activation command to activate said secondary cell in said wireless device;c) receiving, by said wireless device, a control command configured to cause transmission of a random access preamble on random access resources of one of said at least one secondary cell in said second subset;d) receiving, by said wireless device, a random access response, ...

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Номер записи: 41
25-07-2013 дата публикации

Wireless Device for Multicarrier Communications

Номер: US20130188620A1
Автор: Dinan Esmael Hejazi
Принадлежит:

A wireless device establishes a first signaling bearer with a base station on a primary cell. The establishment of the signaling bearer comprises the wireless device receiving a control message from the base station on the primary cell in a plurality of cells comprising the primary cell and at least one secondary cell. The wireless device transmits radio capability parameters to the base station on the first signaling bearer on the primary cell. The radio capability parameters comprise at least one parameter indicating whether the wireless device supports a timing advance groups. 1. A method comprising:a) establishing a first signaling bearer between a wireless device and a base station on a primary cell, said establishing comprising said wireless device receiving a first control message from said base station on said primary cell in a plurality of cells, said plurality of cells comprising said primary cell and at least one secondary cell; andb) transmitting, by said wireless device, a plurality of radio capability parameters to said base station on said first signaling bearer on said primary cell, said plurality of radio capability parameters comprising at least one parameter indicating whether said wireless device supports a plurality of timing advance groups; and i) transmitting a random access preamble on at least one of said at least one secondary cell in a secondary cell group;', (1) a random access preamble on an uplink carrier on one of said at least one secondary cell in said secondary cell group; and', '(2) uplink data on at least one other uplink carrier of at least one other cell in said plurality of cells;, 'ii) parallel transmission of, (1) a random access preamble on an uplink carrier on one of said at least one secondary cell in said secondary cell group; and', '(2) control data on an uplink physical control channel on at least one other uplink carrier of at least one other cell in said plurality of cells;, 'iii) parallel transmission of, 'iv) ...

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Номер записи: 42
25-07-2013 дата публикации

Methods and apparatus for reducing and/or eliminating the effects of self-interference

Номер: US20130188760A1
Автор: Junyi Li, Sundar Subramanian, Xinzhou Wu
Принадлежит: Qualcomm Inc

Methods and apparatus for reducing and/or eliminating the effect of self-interference are described. Various described methods and apparatus are well suited for use in DSRC WAVE systems in which a wireless communications device may acquire and use two DSRC channels, e.g., use one channel for reception while using another channel for transmission at the same time. A wireless communications device which is receiving a signal of interest on a first channel supports concurrent transmission on second channel, e.g., an adjacent channel. Controlled transmission timing synchronization with respect to the received signal of interest facilitates interference estimation and removal. Interference due to spillover energy from the transmission on the adjacent channel is estimated and removed from a received signal to facilitate recovery of the signal of interest.

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Номер записи: 43
25-07-2013 дата публикации

TIME SYNCHRONIZATON OF NETWORK SUBSCRIBERS

Номер: US20130189922A1
Автор: DITTRICH Steffen, Karl Harald
Принадлежит: SIEMENS AKTIENGESELLSCHAFT

A more simple and robust time synchronization of network subscribers compared to solutions known in the state of the art is provided by a device for time synchronization of network subscribers of a network based on satellites, having at least one satellite antenna connected to a receiving unit receiving a satellite signal containing time information. An electronic system that obtains the time from the satellite signal is connected to a time server with a network connection for the synchronization of the network subscribers using a network protocol. The complexity of the device is reduced and the common coaxial infrastructure between the receiving unit and the time server is removed for the satellite signal and replaced by a robust infrastructure. 15-. (canceled)6. An apparatus for the time synchronization of network subscribers of a network by a highly precise time server based on satellites , comprising: at least one satellite antenna,', 'a receiving unit receiving a satellite signal, including an item of time data, via the satellite antenna,', 'an electronics system obtaining time information from the satellite signal, and', 'a time server having a network connection for synchronization of the network subscribers using a network protocol, configured for communication with the highly precise time server which is disposed between the integrated device and the network subscribers, the network protocol compensating for a transit time delay of wiring between the time server and the highly precise time server., 'an integrated device including'}7. The apparatus as claimed in claim 6 , wherein the network is an Ethernet.8. The apparatus as claimed in claim 7 , wherein Power-over-Ethernet can be used for a power supply.9. The apparatus as claimed in claim 8 , wherein the time server is a network time protocol server.10. The apparatus as claimed in claim 9 , wherein the time server is another highly precise time server. This application is the U.S. national stage of ...

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Номер записи: 44
01-08-2013 дата публикации

Backoff snooze wake power consumption within single user, multiple user, multiple access, and/or MIMO wireless communications

Номер: US20130194992A1
Автор: Matthew James Fischer
Принадлежит: Broadcom Corp

Backoff snooze wake power consumption within single user, multiple user, multiple access, and/or MIMO wireless communications. If a communication (e.g., transmission) attempt fails (e.g., by a wireless station (STA), smart meter station (SMSTA), etc.), then a backoff snooze countdown may be performed before a subsequent communication is attempted. Also, if communication activity is detected on the communication medium, then such a backoff snooze countdown may be performed before monitoring the communication medium or a subsequent communication attempt is made. Such a backoff snooze countdown may be based on a codeword value (e.g., such as provided within a beacon received from an access point (AP)), and different respective backoff snooze countdowns may be made based on different respective codeword values. Such backoff snooze countdowns are performed outside of a restricted access window (RAW) in which only devices of a particular class (e.g., low-power, Z, etc.) have access to the communication medium.

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Номер записи: 45
01-08-2013 дата публикации

MAIN HUB, SUB HUB, AND SENSOR NODE COMMUNICATING IN WIRELESS BODY AREA NETWORK (WBAN) INCLUDING AT LEAST ONE SUB HUB, AND COMMUNICATION METHOD THEREOF

Номер: US20130195083A1
Автор: Hong Dae Sik, Hwang Hyo Sun, HYON Tae In, JU Hyung Sik, Kim Young Soo, Lee Seok Won, Park Chang Soon, PARK Sung Soo
Принадлежит:

A main hub, a sub hub, and a sensor node communicating in a wireless body area network (WBAN) including at least one sub hub, and a communication method thereof, are provided. A communication method of the main hub, includes assigning a beacon slot to the sub hub. The method further includes receiving, from the sub hub, a beacon signal based on the beacon slot. The method further includes verifying whether the sub hub includes data to be transmitted to the main hub based on the beacon signal. The method further includes receiving, from the sub hub, the data based on a result of the verification. 1. A communication method of a main hub in a wireless body area network (WBAN) comprising the main hub , a sub hub , and a sensor node , the method comprising:assigning a beacon slot to the sub hub;receiving, from the sub hub, a beacon signal based on the beacon slot;verifying whether the sub hub comprises data to be transmitted to the main hub based on the beacon signal; andreceiving, from the sub hub, the data based on a result of the verification.2. The method of claim 1 , further comprising:receiving, from the sub hub, a request for connection between the sub hub and the main hub;connecting the sub hub and the main hub in response to the request; andtransmitting, to the sensor node, information about the sub hub connected to the main hub.3. The method of claim 1 , further comprising:assigning, to the main hub, another beacon slot; andtransmitting, to the sub hub and the sensor node, another beacon signal based on the other beacon slot.4. The method of claim 1 , further comprising:assigning, to the sub hub, an uplink period for data transmission based on the result of the verification.5. The method of claim 4 , further comprising:assigning, to the main hub, another beacon slot; andtransmitting, to the sub hub, information about the uplink period using another beacon signal based on the other beacon slot.6. The method of claim 1 , further comprising:recognizing that the ...

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Номер записи: 46
01-08-2013 дата публикации

Timing management in uplink (ul) coordinated multipoint (comp) transmission

Номер: US20130195086A1
Автор: Hao Xu, Peter Gaal, Wanshi Chen, Yongbin Wei
Принадлежит: Qualcomm Inc

According to example embodiments, a method for wireless communications by a user equipment (UE) includes receiving signaling indicating multiple timing adjustments (TAs) for different uplink channels between the user equipment (UE) and one or more transmission points, and applying at least one of the multiple TAs when transmitting on at least one of the uplink channels. According to example embodiments, a method for wireless communications by a base station includes determining multiple timing adjustments (TAs) for different uplink channels between the user equipment (UE) and one or more transmission points, and transmitting signaling indicating the multiple timing adjustments (TAs) to the UE.

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Номер записи: 47
01-08-2013 дата публикации

Wireless Local Area Network (LAN) System

Номер: US20130195094A1
Автор: Kubo Hiroaki, OKADA MASAKUNI, Sakuragi Takehito, Yamafuji Kazuto
Принадлежит: INTERNATIONAL BUSINESS MACHINES CORPORATION

A situation is circumvented where wireless communication becomes impossible in a wireless LAN system under the influence of a blocking object, noise caused by an electromagnetic wave, or the like. A wireless LAN system comprises: a relay which can communicate with an external system; a master which can communicate with the relay; and a plurality of slaves which can wirelessly communicate with the master, the plurality of slaves including a first group and a second group, the first group comprising an alternative slave having a function of transmitting, when a portion of the slaves cannot receive a synchronization signal from the master, an information signal received from the master to the portion of slaves, and the second group comprising non-alternative slaves and not having the function of transmitting the information signal to the portion of slaves. 1. A wireless communication method for performing wireless communication between a master and a plurality of slaves which are included in a wireless local area network (LAN) system , the master performing the steps of:establishing a respective direct wireless connection between said master and each of said plurality of slaves wherein communications between said master and each respective slave of said plurality of slaves are transmitted via respective direct wireless transmission between said master and the respective slave without re-transmission through another device;periodically transmitting a master synchronization signal directly from said master to said plurality of slaves, said master synchronization signal being transmitted via respective direct wireless transmission from said master to each slave of said plurality of slaves without re-transmission through another device, said master synchronization signal requiring a respective master synchronization response signal from each of said plurality of slaves;responsive to periodically transmitting a master synchronization signal, periodically receiving a ...

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Номер записи: 48
08-08-2013 дата публикации

PRECISE TIME SYNCHRONIZATION OF NETWORK SUBSCRIBERS

Номер: US20130201906A1
Автор: DITTRICH Steffen, Karl Harald
Принадлежит:

Simple and robust precise time synchronization of network subscribers is provided by a system having at least one head station with a satellite antenna and a receiving station receiving a satellite signal containing time information. Also included is a station clock having a network connection for the synchronization of the network subscribers using a real time network protocol. An electronic system, arranged in the head station or the station clock, receives the time information from the satellite signal. A bidirectional communication infrastructure connects the head station and the station clock. 17-. (canceled)8. A system for precise time synchronization of network subscribers of a network based on satellites , comprising:at least one head station having a satellite antenna and a receiving station connected to the satellite antenna receiving a satellite signal containing time information;a ground station having a network connection to the network subscribers and providing time synchronization using a real time network protocol;an electronic system, in one of the head station and the ground station, receiving the time information from the satellite signal; anda bidirectional communication infrastructure between the head station and the ground station.9. The system as claimed in claim 8 , wherein the communication infrastructure is an Ethernet infrastructure.10. The system as claimed in claim 8 , wherein the communication infrastructure is embodied as DSL infrastructure.11. The system as claimed in claim 10 , wherein the communication infrastructure has protocol mechanisms providing data security.12. The system as claimed in claim 11 , wherein the head station includes at least two satellite technologies providing at least two satellite signals that are correlatable.13. The system as claimed in claim 12 , wherein at least one satellite technology is orthogonally implemented in the head station.14. The system as claimed in claim 13 , wherein the head station is ...

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Номер записи: 49
08-08-2013 дата публикации

Open/Closed Loop Synchronization for Radio Transmitters

Номер: US20130201967A1
Автор: Nentwig Markus
Принадлежит: Nokia Corporation

Methods and systems can provide accurate synchronization of two nodes even when those nodes cannot communicate directly with one another. A method, for example, can include determining a first propagation delay estimate to a first node (). The method can also include determining a second propagation delay estimate to a second node (). The method can further include receiving a first synchronization message from the first node (). The method can additionally include transmitting a second synchronization message to the second node (). The second synchronization message depends on the first synchronization message, the first propagation delay estimate, and the second propagation delay estimate. 1. A method , comprising:determining a first propagation delay estimate to a first node;determining a second propagation delay estimate to a second node;receiving a first synchronization message from the first node; andtransmitting a second synchronization message to the second node wherein the second synchronization message depends on the first synchronization message, the first propagation delay estimate, and the second propagation delay estimate.2. The method of claim 1 , wherein the receiving the first synchronization message from the first node comprises receiving an estimate of accumulated movement of the first node.3. The method of claim 1 , further comprising:receiving a third synchronization message from the second node; andtransmitting a fourth synchronization message to the first node, wherein the fourth synchronization message depends on the third synchronization message, the first propagation delay estimate, and the second propagation delay estimate.4. The method of claim 3 , wherein the receiving the third synchronization message from the second node comprises receiving an estimate of accumulated movement of the second node.5. The method of claim 4 , further comprising:estimating a change in a length of a radio path in a time interval; anddiscarding a propagation ...

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Номер записи: 50
08-08-2013 дата публикации

Method and Apparatus for Distributing Synchronization Information

Номер: US20130203424A1
Автор: Hakola Sami, Koskela Timo, Turtinen Samuli, Van Phan Vinh
Принадлежит: NOKIA SIEMENS NETWORKS OY

An apparatus including at least one processor and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to at least evaluate, in a cognitive node, transmission of a physical random access channel in an uplink of a communications carrier, and, based on the evaluating, utilize an interference-free guard time period of a cellular user terminal's transmission in the physical random access channel, for distributing a synchronization signal and a beacon signal locally, the cellular user terminal's transmission in the physical random access channel including a guard time period that compensates a maximum round trip delay in a cell. 1. A method comprisingevaluating, in a cognitive local node, transmission of a physical random access channel in an uplink of a communications carrier; andbased on the evaluating, utilizing an interference-free guard time period of a cellular user terminal's transmission in the physical random access channel, for distributing a synchronization signal and a beacon signal locally, the cellular user terminal's transmission in the physical random access channel including a guard time period that compensates a maximum round trip delay in a cell.2. A method as claimed in claim 1 , wherein the cognitive lo-cal node synchronized to a network is able to observe a time instant of the guard time period of a cellular user terminal close to the cognitive local node claim 1 , and utilize the interference-free guard time for broadcasting beacon signal information and synchronization signal information locally.3. A method as claimed in claim 2 , wherein the synchronization signal information is distributed periodically to users of the cognitive local node claim 2 , by utilizing the interference-free guard time period of the cellular user terminal's transmission in the physical random access channel.4. A method as claimed in claim 1 , ...

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Номер записи: 51
15-08-2013 дата публикации

REFERENCE SIGNAL CREATION APPARATUS AND PREAMBLE SEQUENCE DETECTION APPARATUS USING THE SAME

Номер: US20130208679A1
Автор: Ji Seunghwan, Joung Jinsoup, Lee Eunjin, Lim Yonghoon, Yang Seungik
Принадлежит: INNOWIRELESS CO., LTD.

The present invention relates to a method for shortening the time taken for physical random access channel (PRACH) signal synchronization and preamble sequence detection in an LTE uplink system, and more particularly, to a method for shortening the time taken for preamble sequence detection using an inverse discrete Fourier transform. To this end, a preamble sequence detection apparatus according to the present invention comprises: a reference signal generation unit, which includes a preamble sequence generation unit for receiving a first signal having a predetermined length and outputting a plurality of second signals having the length of 839, a discrete Fourier transform unit for performing a discrete Fourier transform on the second signals received from the preamble sequence generation unit to transform the second signals into a frequency domain signal, a subcarrier mapping unit for mapping the frequency domain signal outputted from the discrete Fourier transform unit to a subcarrier, and an inverse discrete Fourier transform unit for receiving a signal having the length of 2from the subcarrier mapping unit and performing an inverse discrete Fourier transform to transform the received signal into a time domain signal having the length of 2; a PRACH reception unit which receives a PRACH signal transmitted from a terminal; and a second correlation unit which detects a correlation between the reference signal received from the reference signal generation unit and a signal received from the PRACH reception unit. 1. A reference signal generation apparatus comprising:a preamble sequence generation unit for receiving a first signal having a predetermined value and outputting a plurality of second signals, each having a length of 839;a Discrete Fourier Transform (DFT) unit for performing a DFT on the second signals received from the preamble sequence generation unit, and transforming the second signals to frequency domain signals;a subcarrier mapping unit for performing ...

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Номер записи: 52
22-08-2013 дата публикации

RADIO COMMUNICATION SYSTEM

Номер: US20130215821A1
Автор: Horiike Yoshio, Koba Yasuo, Watanabe Takashi, Yamamoto Masahiro
Принадлежит: Panasonic Corporation

In a radio communication system of the present invention, a second radio relay terminal () can receive terminal calling data from a radio adapter terminal () in a lower layer of the just second radio relay terminal (), after it transmits a beacon signal to the radio adapter terminal (). The second radio relay terminal () can receive a beacon signal from a first radio relay terminal () soon after it receives the terminal calling data, and transmit the terminal calling data to the first radio relay terminal () just after it receives the beacon signal. Thus, it becomes possible to suppress a significant delay in relay transmission of the terminal calling data, and implement quick radio communication. 1. A radio communication system comprising:a plurality of radio communication devices including a plurality of radio adapter terminals which are in a lowermost layer, a radio access point terminal in an uppermost layer which performs radio communication with the radio adapter terminals, and a radio relay terminal which intervenes between the radio adapter terminals and the radio access point terminal, and performs communication with the radio adapter terminals and the radio access point terminal;wherein each of the radio access point terminal and the radio relay terminal is configured to transmit a beacon signal regularly to a radio communication device in a lower layer of the radio access point terminal and the radio relay terminal, each of the radio relay terminal and the radio adapter terminals is configured to regularly receive the beacon signal transmitted from a radio communication device in an upper layer of the radio relay terminal and the radio adapter terminal, and synchronize an internal clock of each of the radio relay terminal and the radio adapter terminals with an internal clock of the radio communication device in the upper layer;when a time period that elapses from an initial upper beacon transmission time point which is a time point when the radio access ...

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Номер записи: 53
22-08-2013 дата публикации

Communication method, user equipment and base station

Номер: US20130215874A1
Автор: Dongli Yang, Tao He
Принадлежит: Huawei Technologies Co Ltd

Embodiments of the present disclosure provide a communication method, a base station and a user equipment. The communication method includes: sending, by a base station, a random access response message to a user equipment UE, where the random access response message includes a timing advance command, and a value T A of the timing advance command is N TA /(N*Ts), where, the N TA indicates the amount of the time alignment the UE, the N*Ts indicates a unit granularity for the UE to perform time alignment, the N is greater than 16, and the Ts indicates the smallest time unit. In the present disclosure, the unit granularity for the UE to perform time alignment may be enlarged, so that the UE can use a larger amount of the time alignment when performing the time alignment, thereby supporting the coverage of a cell with a long distance.

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Номер записи: 54
22-08-2013 дата публикации

Method for network organization

Номер: US20130215909A1
Автор: Christian Fluegel, Juergen Hupp, Thomas Windisch
Принадлежит: Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV

A transmitter for sending data packets over a time-multiplexed channel includes a time slot selector for selecting a time slot for transmitting a data packet; and a data packet position selector for selecting a data packet time position within the selected time slot, wherein the data packet time position is selected anew for at least every i th data packet. The transmitter is configured for transmitting the data packet in the selected time slot and the selected data packet position within the selected time slot. A method for transmitting data packet is also disclosed. Furthermore, a receiver, a method for receiving data packets and a computer program are additionally described.

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Номер записи: 55
05-09-2013 дата публикации

Time synchronization method and time synchronization device for mobile communications system

Номер: US20130230041A1
Автор: Han Li, Lei Wang, Liuyan Han
Принадлежит: China Mobile Communications Group Co Ltd

The present invention discloses a time synchronization method and a time synchronization device for a mobile communication system. When the time status of one type of time protocol is bad, a different type of time protocol having a better status can be automatically selected, thereby the system flexibility and the time information quality and reliability can be effectively enhanced. The time synchronization method for a mobile communication system may comprise: selecting respectively an optimal time source for each type of time protocol port of at least two types of time protocol ports; selecting a system optimal time source from optimal time sources for respective types of time protocol ports.

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Номер записи: 56
05-09-2013 дата публикации

Per-cell timing and/or frequency acquisition and their use on channel estimation in wireless networks

Номер: US20130231123A1
Автор: Ke Liu, Taesang Yoo, Tao Luo, Xiaoxia Zhang
Принадлежит: Qualcomm Inc

A method, an apparatus, and a computer program product for wireless communication are provided in which a system timing is estimated, derived from timing of one or more cells, a timing offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the timing offsets. In addition, a method, an apparatus, and a computer program product for wireless communication are provided in which a carrier frequency is estimated, derived from a frequency of one or more cells, a frequency offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the frequency offsets.

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Номер записи: 57
12-09-2013 дата публикации

Information notification and timing advance acquisition method, system, and device

Номер: US20130235858A1
Автор: Jing Liang, Yali Zhao
Принадлежит: Datang Mobile Communications Equipment Co Ltd

Embodiments of the invention disclose an information notification and timing advance acquisition method, system and device, relate to the field of wireless communications and address the problem of how a UE acquires a Timing Advance (TA) for uplink transmission in a cell newly added in a set of cells configured for the UE. In the invention, a base station sends mapping relationships between cell and Timing Advance, TA, group to a UE, and the UE determines a TA group corresponding to a newly added cell configured for the UE by the base station according to the mapping relationships; determines whether there is a cell, having established uplink synchronization with the based station, in the TA group; and if so, then the UE regards a TA of the cell as a TA for uplink transmission in the newly added cell; otherwise, the UE acquires a TA for uplink transmission in the newly added cell by initiating a random access procedure. Apparently with the invention, the UE can acquire a TA for uplink transmission in the newly added cell.

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Номер записи: 58
12-09-2013 дата публикации

ELECTRONIC-BOOK SYSTEM AND METHOD FOR SHARING ADDITIONAL PAGE INFORMATION THEREOF

Номер: US20130239020A1
Автор: HEO Dong-Kyu, KIM Yeong-Min
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

An e-book system for sharing information between e-book readers and an operating method thereof are provided. The e-book system includes a first e-book reader and a second e-book reader for synchronizing and reproducing the same pages of the same e-book contents in real time, wherein the first e-book reader displays additional information received from a user on a current page of the e-book contents and transmits the additional information to the second e-book reader and wherein the second e-book reader displays the additional information received from the first e-book reader on a current page of the e-book contents. 1. A method for sharing information added to at least one same page of e-book contents by an e-book reader , the method comprising:synchronizing and reproducing the at least one same page of the same e-book contents by a first e-book reader in real time with a peer e-book reader via wireless communication, wherein the at least one same page comprises a current page being displayed by the first e-book reader;displaying by the first e-book reader additional information input to or received by with regard to the current page of the e-book contents; andtransmitting the additional information to the peer e-book reader for display by the peer e-book reader.2. The method of claim 1 , wherein the synchronization and reproduction of the at least one same page of the same e-book contents in real time with the peer e-book reader comprises the first e-book reader transmitting the current page information of the e-book contents to the peer e-book reader.3. The method of claim 1 , wherein the display of the additional information input to or received by the first e-book reader on the current page of the e-book contents comprises processing the e-book contents by applying the additional information and reproducing the processed e-book contents.4. The method of claim 3 , wherein the display of the additional information input to or received by the first e-book reader ...

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Номер записи: 59
19-09-2013 дата публикации

METHOD AND APPARATUS FOR DISTRIBUTED SYNCHRONIZATION IN FEMTOCELL NETWORKS

Номер: US20130242861A1
Автор: ABCHUYEH Marjan Baghaie, BLESSENT Luca, CELEBI Samel
Принадлежит: QUALCOMM INCORPORATED

Aspects disclosed herein relate to facilitating synchronizing frequency and/or timing of a wireless network. In an example, with a femto node configured to receive one or more signals from one or more anchor sources, determine that at least one of the one or more signals are received at least at a threshold signal quality, determine whether a difference in a local frequency and/or a local timing is within a threshold difference to a signal frequency and/or a signal timing determined based on the at least one of the one or more signals, and advertise an anchor status where the difference is within the threshold difference. 1. A method for synchronizing frequency and/or timing in a wireless network , comprising:receiving one or more signals from one or more anchor sources;determining that at least one of the one or more signals are received at least at a threshold signal quality;determining whether a difference in a local frequency and/or a local timing is within a threshold difference to a signal frequency and/or a signal timing determined based on the at least one of the one or more signals; andadvertising an anchor status where the difference is within the threshold difference.2. The method of claim 1 , further comprising terminating or suspending a frequency and/or timing update procedure upon determining that the difference is within the threshold difference.3. The method of claim 1 , further comprising synchronizing the local frequency and/or the local timing to the signal frequency and/or the signal timing where the difference is not within the threshold difference.4. The method of claim 1 , wherein the advertising the anchor status comprises transmitting a broadcast signal that indicates the anchor status.5. The method of claim 1 , wherein the advertising the anchor status comprises notifying one or more femto nodes of the anchor status over a backhaul connection.6. An apparatus for synchronizing frequency and/or timing in a wireless network claim 1 , ...

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Номер записи: 60
19-09-2013 дата публикации

Scalable protocol for large wsns having low duty cycle end nodes

Номер: US20130242905A1
Автор: Paul B. Rasband, Stewart E. Hall
Принадлежит: Sensormatic Electronics LLC

A method and system are described for providing a wireless sensor network between a main node and a plurality of nodes, the nodes associate with sensors. The method and system define communications channels over which the main node communicates with the nodes based on a channel hopping scheme pattern, and define at least one transfer channel that is dedicated to carrying transfer frames that are broadcast by the main node. The method and system configure non-attached nodes that are not attached to the network, to enter a connection session by tuning to the transfer channel to listen for a transfer message. The transfer message indicates a next communications channel. The method tunes the non-attached nodes to the next communications channel, listens for a beacon frame, and utilizes the beacon frame as a timing reference to enable the non-attached nodes to attach to the network.

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Номер записи: 61
19-09-2013 дата публикации

SYNCHRONIZATION METHOD FOR DISTRIBUTED ANTENNA SYSTEM AND APPARATUS USING THE SAME

Номер: US20130242951A1
Автор: CHOI Hye Young, Han Seung Hee, KIM Jin Min, Lee Hyun Woo, SON Hyuk Min
Принадлежит: LG ELECTRONICS INC.

A method for uplink synchronization in a distributed antenna system is provided. A user equipment determines a transmission offset based on a transmission point for uplink synchronization, allocates uplink synchronization signal to a second communication channel based on the transmission offset, and transmits the uplink transmission signal to the transmission point for uplink synchronization through the second communication channel. 1. A method for downlink synchronization in a distributed antenna system , comprising:determining, by a base station, a transmission offset based on a transmission point to which a downlink synchronization signal is transmitted;allocating, by the base station, the downlink synchronization signal to a first communication channel based on the transmission offset; andtransmitting, by the base station, the downlink synchronization signal to a user equipment through the first communication channel.2. The method of claim 1 , wherein the transmission point is a macro eNB or RRH (Remote Radio Heads) and the transmission offset is determined based on antenna port 0 of the macro eNB.3. The method of claim 1 , wherein the first communication channel is Physical Broadcasting Channel (PBCH) in the LTE (Long Term Evolution)-Advanced system.4. A method for uplink synchronization in a distributed antenna system claim 1 , comprising:determining, by a user equipment, a transmission offset based on a transmission point for uplink synchronization;allocating, by the user equipment, uplink synchronization signal to a second communication channel based on the transmission offset; andtransmitting, by the user equipment, the uplink transmission signal to the transmission point for uplink synchronization through the second communication channel.5. The method of claim 4 , wherein the transmission point is a macro eNB or RRH (Remote Radio Heads) and the transmission offset is determined based on whether the transmission point is a macro eNB or RRH (Remote Radio ...

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Номер записи: 62
19-09-2013 дата публикации

ACCESS POINT SYNCHRONIZATION WITH COOPERATIVE MOBILE DEVICES

Номер: US20130244653A1
Автор: Chakraborty Kaushik, SOLIMAN Samir Salib, Song Bongyong
Принадлежит: QUALCOMM INCORPORATED

A mobile device provides first information to an access point over an out-of-band wireless link. The access point uses the first information to coarsely synchronize with a macrocell base station. The access point transmits a low power pilot signal that is formed using a pseudo-random noise (PN) sequence. The mobile device uses the out-of-band wireless link to provide second information to the access point that indicates a PN phase of the pilot signal with respect to a reference time point. The access point uses the second information to finely synchronize with the macrocell base station. The mobile device communicates with a mobile operator core network through the access point using an in-band wireless link to the access point. The mobile device compensates for propagation delay when obtaining time information. The mobile device provides additional information to the access point, which the access point uses to adjust for continued clock drift. 1. A method performed by a mobile device , the method comprising:providing first information to an access point over an out-of-band wireless link, the first information usable by the access point to coarsely synchronize with a macrocell base station;providing second information to the access point over the out-of-band wireless link, the second information usable by the access point to finely synchronize with the macrocell base station; andcommunicating with a mobile operator core network through the access point using an in-band wireless link to the access point.2. The method of claim 1 , further comprising:making measurements of signals from both the access point and the macrocell base station to determine the second information.3. The method of claim 1 ,wherein the in-band wireless link uses one or more frequencies that are within a set of frequency ranges designated for cellular phone network use for communications with base stations connected to the mobile operator core network; andwherein the out-of-band wireless link ...

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Номер записи: 63
03-10-2013 дата публикации

Radio Access for a Wireless Device and Base Station

Номер: US20130258957A1
Автор: Dinan Esmael Hejazi
Принадлежит:

A wireless device receives control message(s) configuring a plurality of cell groups and a time alignment timer for each of the plurality of cell groups. The time alignment timer starts or restarts in response to the wireless device receiving a timing advance command to adjust uplink transmission timing of a commanded cell group. The wireless device receives a control command initiating a random access process for a secondary cell in the secondary cell group. The wireless device aborts the random access process on the secondary cell if a first time alignment timer of the primary cell group expires. 1. A method comprising: i) configuration of a plurality of cells comprising a primary cell and at least one secondary cell;', (1) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising said primary cell; and', '(2) a secondary cell group comprising a second subset of said at least one secondary cell; and, 'ii) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising, (1) out-of-sync in response to said time alignment timer being expired or not running; and', '(2) in-sync in response to said time alignment timer running;, 'iii) configuration of a time alignment timer for each of said plurality of cell groups, said time alignment timer starting or restarting in response to said wireless device receiving a timing advance command to adjust uplink transmission timing of a commanded cell group in said plurality of cell groups, said commanded cell group considered], 'a) receiving, by a wireless device, at least one control message from a base station, said at least one control message causing in said wireless deviceb) initiating, by said wireless device, a random access process for a secondary cell in said secondary cell group in response to receiving a control command;c) transmitting, by said wireless device, a first random access preamble on ...

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Номер записи: 64
03-10-2013 дата публикации

Timing Advance Timer Configuration in a Wireless Device and a Base Station

Номер: US20130258958A1
Автор: Esmael Hejazi Dinan
Принадлежит: Individual

A base station transmits control message(s) comprising media access control dedicated parameters. The media access control dedicated parameters comprise a time alignment timer value for a primary cell group and a sequence of at least one element. Each element comprises a time alignment timer value and a cell group index. The time alignment timer value is associated with the cell group identified by the one cell group index. Each time alignment timer value is selected from a finite set of predetermined values.

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Номер записи: 65
03-10-2013 дата публикации

SYNCHRONIZATION IN A FLEXIBLE BANDWIDTH WIRELESS NETWORK

Номер: US20130259007A1
Автор: HOWARD Paul
Принадлежит:

In a wireless network, a primary synchronization signal and a secondary synchronization signal are sent at a predetermined bandwidth in a transmission. The predetermined bandwidth is a lowest operating bandwidth of the wireless network. Data is also sent in the transmission using an operating bandwidth greater than the lowest operating bandwidth. 1. A wireless network device comprising:circuitry configured to send a primary synchronization signal at a predetermined bandwidth of a wireless network and a secondary synchronization signal at the predetermined bandwidth in a transmission, wherein the predetermined bandwidth is a lowest operating bandwidth of a plurality of operating bandwidths of the wireless network; andwherein the circuitry is further configured to send data in the transmission using an operating bandwidth of the wireless network and the operating bandwidth is greater than the lowest operating bandwidth of the wireless network.2. The wireless network device of wherein the primary synchronization signal is sent at a first fixed time offset.3. The wireless network device of wherein the secondary synchronization signal is sent at a second fixed time offset.4. The wireless network device of wherein the wireless network device is a Node B.5. The wireless network device of wherein the predetermined bandwidth and the plurality of operating bandwidths are each associated with a chip rate.6. The wireless network device of wherein the lowest operating bandwidth and the operating bandwidth are each associated with a chip rate.7. The wireless network device of wherein the wireless network device is configured as a wide-band code-division multiple access (WCDMA) device claim 1 , a time division duplex (TDD) device claim 1 , or a Universal Mobile Telecommunication Systems (UMTS) device.8. A wireless network comprising:a core network configured to send data to a wireless network device;the wireless network device configured to send a primary synchronization signal at ...

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Номер записи: 66
10-10-2013 дата публикации

METHOD, APPARATUS AND SYSTEM FOR SYNCHRONIZATION BETWEEN BASE STATIONS

Номер: US20130265992A1
Автор: Deng Tianle, LUO Haiyan, Tang Binsong
Принадлежит:

The present invention provides a method, an apparatus, and a system for synchronization between base stations. The method for synchronization between base stations includes: A first base station receives synchronization information sent by a user equipment, where the first base station is a serving base station of the user equipment; and the first base station adjusts a downlink sending time point and an uplink receiving time point of the first base station according to the synchronization information, so as to keep consistency between the downlink sending time point of the first base station and a downlink sending time point of a second base station that serves as a synchronization time reference and keep consistency between the uplink receiving time point of the first base station and an uplink receiving time point of the second base station. 1. A method for synchronization between base stations , comprising:receiving, by a first base station, synchronization information sent by a user equipment, wherein the first base station is a serving base station of the user equipment; andadjusting, by the first base station, a downlink sending time point and an uplink receiving time point of the first base station according to the synchronization information, so as to keep consistency between the downlink sending time point of the first base station and a downlink sending time point of a second base station and keep consistency between the uplink receiving time point of the first base station and an uplink receiving time point of the second base station, wherein the second base station serves as a synchronization time reference.2. The method according to claim 1 , wherein the synchronization information comprises the downlink sending time point of the second base station and/or the uplink receiving time point of the second base station.3. The method according to claim 2 , wherein the adjusting claim 2 , by the first base station claim 2 , the downlink sending time point and ...

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Номер записи: 67
17-10-2013 дата публикации

Digital wireless intercom system and driving method thereof

Номер: US20130272275A1
Автор: Chang-Nam Yu
Принадлежит: Laon Tech Co Ltd

The present invention provides a digital wireless intercom system including: at least one master base station; at least one remote base station connected to the at least one master base station wiredly through at least one of a local area network, a local area network infrastructure and an internet, the at least one remote base station transmitting and receiving a synchronization signal and a data signal of digital type with the at least one master base station; a plurality of first belt packs within a transmission radius of the at least one master base station, the plurality of first belt packs transmitting and receiving the synchronization signal and the data signal with the at least one master base station wirelessly; and a plurality of second belt packs within a transmission radius of the at least one remote base station, the plurality of second belt packs transmitting and receiving the synchronization signal and the data signal with the at least one remote base station wirelessly, wherein the at least one master base station and the at least one remote base station are driven with different independent frequencies based on a frequency interference situation, and wherein the synchronization signal and the data signal transmitted and received between the at least one master base station and the at least one remote base station have different starting timings of period

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Номер записи: 68
17-10-2013 дата публикации

Methods and User Equipments for Providing Information About a Connection State

Номер: US20130272294A1
Автор: Fodor Gabor, Hedberg Tomas, Mildh Gunnar, Vikberg Jari
Принадлежит: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

A method in a first user equipment () and a first user equipment () for providing information about at least one of a first and a second connection state are provided. Moreover, a corresponding method in a second user equipment () and a second user equipment () are provided. The first connection state is related to a first connection between the first user equipment () and a radio network node (). The second connection state is related to a second connection between the first user equipment () and the second user equipment (). The first user equipment () encodes () information about at least one of the first and second connection states into a synchronization signal for synchronizing the second user equipment () to the first user equipment (). The first user equipment () sends () the synchronization signal to at least the second user equipment (), thereby providing information about at least one of the first and second connection states. The second user equipment () decodes () the synchronization signal. 112-. (canceled)13. A method in a first user equipment for providing information about at least one of a first and a second connection state , the first connection state being related to a first connection between the first user equipment and a radio network node , the second connection state being related to a second connection between the first user equipment and a second user equipment , wherein a radio communication system based on Orthogonal Frequency Division Multiplexing (OFDM) comprises the radio network node and the first and second user equipments , wherein the method comprises:encoding information about at least one of the first and second connection states into a synchronization signal for synchronizing the second user equipment to the first user equipment; andsending the synchronization signal to at least the second user equipment, thereby providing information about at least one of the first and second connection states.14. The method of claim 13 , ...

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Номер записи: 69
24-10-2013 дата публикации

SYSTEMS AND METHODS FOR SYNCHRONIZING WIRELESS AUDIO BASE STATIONS

Номер: US20130281074A1
Автор: Bodley Martin, Cleve Pascal, Muchaxo Antonio Manuel Pedroso, Schau Jonathan, Sousa Alexandre
Принадлежит:

Systems and methods for adaptive OTA (over-the-air) synchronization of RF (radio frequency) base stations are described herein. Using these systems and methods, base stations in wireless audio systems can automatically identify externally sourced base station clocks and merge overlapping clock system domains, thereby eliminating the need for complex base station management and network configuration. 1. A method of synchronizing a clock used by a first base station in a wireless audio system , comprising:scanning for a second base station for a predetermined period of time; the first base station checks a broadcast message from the second base station for a primary ID;', 'the first base station compares the primary ID of the second base station to a unique identifier of the first base station;', 'if the primary ID of the second base station does not match the unique identifier of the first base station, the first base station derives a clock signal from a signal produced by the second base station., 'if the second base station is found prior to the expiration of the predetermined period of time,'}2. The method of claim 1 , wherein the first base station derives a clock signal by synchronizing an internally generated clock signal with the signal produced by the second base station.3. The method of claim 1 , wherein the first base station derives a clock signal by utilizing the signal produced by the second base station as its own clock signal.4. The method of claim 1 , wherein the first base station utilizes an internally generated clock signal if the second base station is not detected within the predetermined period of time.5. The method of claim 1 , further comprising claim 1 , if more than one second base station is found claim 1 , connecting the first base station to the second base station having the strongest signal.6. The method of claim 1 , further comprising periodically repeating the step of scanning for the second base station.7. The method of claim 1 , ...

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Номер записи: 70
07-11-2013 дата публикации

Macro-Network Location Determination, Local-Oscillator Stabilization, and Frame-Start Synchronization Based on Nearby FM Radio Signlas

Номер: US20130294342A1
Автор: Rausch Walter, Satapathy Durga Prasad
Принадлежит:

Exemplary methods and systems may generally be implemented to allow a macro-network base station without access to a GPS reference signal to provide some or all of the functionality for which existing macro-network base stations typically rely on GPS. In a first aspect, an exemplary macro-network base station may determine its location using a location-determination technique that is based upon the angles of arrival of FM radio signals from nearby FM stations. In a second aspect, an exemplary macro-network base station may stabilize its local oscillator by phase-locking its local oscillator to an FM radio signal, and periodically adjusting its local oscillator to account for phase drift of the FM radio signal. And in a third aspect, an exemplary macro-network base station may synchronize its frame-start timing with a nearby base station using a frame-start timing signal that the base station has synchronized to frame transmissions from the nearby base station during a setup routine. 1. A method for frame-start synchronization with nearby base stations in the macro network , the method comprising:(a) a second base station receiving a first signal from a first base station in the macro network, wherein the first signal comprises frames, and wherein the first signal further comprises an identifier of the first base station;(b) the second base station synchronizing a frame-start timing signal with the frames in the first signal;(c) the second base station determining a time-of-flight delay between the first base station and the second base station;(d) the second base station adjusting timing of the frame-start signal to account for the time-of-flight delay between the first base station and the second base station; and(e) the second base station transmitting a second signal that is formatted into frames, wherein the second base station uses the frame-start timing signal to control the timing of the frames in the second signal.247. The method of claim , wherein the ...

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Номер записи: 71
07-11-2013 дата публикации

METHOD FOR WIRELESS DATA TRANSMISSION, COMMUNICATION SYSTEM, WIRELESS TERMINAL APPARATUS AND WIRELESS BASE STATION APPARATUS

Номер: US20130294388A1
Автор: Kawasaki Yoshihiro, OHTA Yoshiaki
Принадлежит:

A method for radio data transmission in a radio communication system including a radio terminal apparatus and a radio base station apparatus, the method including, transmitting, by the radio base station apparatus, data and a signal indicating radio resource to be used for random access to an asynchronous radio terminal apparatus not synchronized with the radio base station apparatus on an uplink, and transmitting, by the asynchronous radio terminal apparatus to the radio base station apparatus via a random access channel, a reply signal generated based on whether or not the data has been correctly received and on a signal received from the radio base station apparatus and indicating the radio resource. 1. A method for radio data transmission in a radio communication system including a radio terminal apparatus and a radio base station apparatus , the method comprising:transmitting, by the radio base station apparatus, data and a signal indicating radio resource to be used for random access to an asynchronous radio terminal apparatus not synchronized with the radio base station apparatus on an uplink; andtransmitting, by the asynchronous radio terminal apparatus to the radio base station apparatus via a random access channel, a reply signal generated based on whether or not the data has been correctly decoded and on a signal received from the radio base station apparatus and indicating the radio resource.2. The method for radio data transmission according to claim 1 , wherein the radio base station apparatus transmits the signal indicating the radio resource to be used for the random access when simultaneously transmitting the data.3. The method for radio data transmission according to claim 2 , wherein the radio base station apparatus transmits the signal indicating the radio resource to be used for the random access before transmitting the data.4. The method for radio data transmission according to claim 1 , wherein the radio resource to be used for the random ...

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Номер записи: 72
14-11-2013 дата публикации

Methods and apparatus for uplink timing alignment in system with large number of antennas

Номер: US20130301619A1
Автор: Jaspreet Singh, Ying Li, Zhouyue Pi
Принадлежит: SAMSUNG ELECTRONICS CO LTD

A mobile station is configured to perform a method for uplink timing alignment in a wireless network. The method includes receiving a first downlink synchronization signal from a base station on a first beam pair at a first time associated with a first propagation delay. The method also includes receiving a second downlink synchronization signal from the base station on a second beam pair at a second time associated with a second propagation delay. The method further includes determining a second timing advance for the second beam pair based on a known first timing advance for the first beam pair and a time difference between the first time and the second time.

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Номер записи: 73
14-11-2013 дата публикации

SYSTEMS AND METHODS FOR DEVICE-AGNOSTIC WIRELESS SYNCHRONIZATION

Номер: US20130304862A1
Автор: Johansen Jon Lech, Soberanis Juan
Принадлежит: doubleTwist Corporation

A method of synchronizing content between a mobile device and a computer, the mobile device having a client media file located thereon and the computer having a host media file located thereon. The method includes (A) the mobile device discovering a web service on the computer via a wireless connection with the computer; (B) the mobile device mounting the host media file from the computer; (C) the mobile device uploading a copy of the host media file to the mobile device; (D) the mobile device synchronizing the client media file with the uploaded copy of the host media file to form a revised host media file; and (E) the mobile device uploading the revised host media file to the computer; and (F) while the mobile device is performing steps (D) an (E), the mobile device monitoring the wireless connection between the mobile device and the computer. 1. A method of synchronizing content between a mobile device and a computer , the mobile device having a client media file located thereon and the computer having a host media file located thereon , the method comprising:(A) the mobile device discovering a web service on the computer via a wireless connection with the computer;(B) the mobile device mounting the host media file from the computer;(C) the mobile device uploading a copy of the host media file to the mobile device;(D) the mobile device synchronizing the client media file with the uploaded copy of the host media file to form a revised host media file; and(E) the mobile device uploading the revised host media file to the computer; and(F) while the mobile device is performing steps (D) an (E), the mobile device monitoring the wireless connection between the mobile device and the computer.2. The method of wherein step (D) of synchronizing comprises:inserting records from the client media file into the uploaded copy of the host media file.3. The method of wherein step (D) of synchronizing comprises:deleting records from the client media file into the uploaded copy of ...

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Номер записи: 74
21-11-2013 дата публикации

METHOD AND APPARATUS FOR PERFORMING SYNCHRONIZATION IN DEVICE-TO-DEVICE NETWORK

Номер: US20130308625A1
Автор: KIM Dae-Gyun, Kim Kyung-Kyu, LIM Chi-Woo, Park Seung-Hoon
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A method and an apparatus for performing synchronization by a first device in a Device-to-Device (D2D) network are provided. The method includes detecting a synchronization signal from at least one second device during one period, determining a phase adjustment value depending on a number of synchronization signals, which have been detected from the at least one second device during the one period, adjusting a phase value of a first device using the phase adjustment value, and transmitting a synchronization signal if the phase value of the first device reaches a predetermined specific value. 1. A method for performing synchronization by a first device in a Device-to-Device (D2D) network , the method comprising:detecting a synchronization signal from at least one second device during one period;determining a phase adjustment value depending on a number of synchronization signals, which have been detected from the at least one second device during the one period;adjusting a phase value of a first device using the phase adjustment value; andtransmitting a synchronization signal if the phase value of the first device reaches a predetermined specific value.2. The method of claim 1 , wherein the one period continues from a point of time that the first device transmitted a previous synchronization signal claim 1 , until the first device transmits a current synchronization signal.3. The method of claim 2 , wherein the one period varies depending on a number of synchronization signals claim 2 , which have been detected from the at least one second device beginning from the point of time that the first device transmitted the previous synchronization signal claim 2 , until the first device transmits the current synchronization signal.4. The method of claim 1 , wherein the phase adjustment value includes a coupling factor used to adjust a phase of a Pulse-Coupled Oscillator (PCO) mounted in the first device.5. The method of claim 4 , wherein the coupling factor is determined ...

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Номер записи: 75
21-11-2013 дата публикации

METHOD AND APPARATUS OF IMPLEMENTING TIME SYNCHRONIZATION

Номер: US20130308626A1
Автор: FENG Liexun, He Yong
Принадлежит: Huawei Technologies Co., Ltd.

The present invention discloses a method of time synchronization and a base station system. The base station system includes a main unit, at least one radio unit, and a transmission medium adapted to transmit information between the main unit and the at least one radio unit. The base station system further includes a clock synchronization server configured close to the side of the at least one radio unit or integrated with the at least one radio unit. The clock synchronization server is adapted to transmit synchronization data to the main unit through the transmission medium, so that the main unit performs configuration processing according to the synchronization data to implement time synchronization with the clock synchronization server. 1. A base station system , comprising:a main unit, at least one radio unit, and a transmission medium configured to transmit information between the main unit and the at least one radio unit,wherein the base station system further comprises a clock synchronization server, configured to transmit a first synchronization data from the clock synchronization server to the main unit through the transmission medium to enable the main unit to perform configuration processing according to the first synchronization data to implement time synchronization with the clock synchronization server, wherein the clock synchronization server is configured close to a side of the at least one radio unit or integrated with the at least one radio unit.2. The base station system according to claim 1 , wherein the transmission medium comprises an optical fiber.3. The base station system according to claim 2 , wherein the base station system further comprises a first optical adapter module coupled to the at least one radio unit and the clock synchronization server claim 2 , the first optical adapter module includes a first optical fiber interface coupled to the optical fiber claim 2 , and the first optical adapter module is configured to converge the first ...

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Номер записи: 76
28-11-2013 дата публикации

TIME SYNCHRONISATION IN A SINGLE NETWORK

Номер: US20130315226A1
Автор: Bombelli Carlo
Принадлежит: ONETASTIC S.R.L.

A method for synchronizing in time a plurality of transmitters (T-T) belonging to a single frequency network, the transmitters (T-T) being adapted to distribute a radio frequency signal over a territory, includes: identifying, for each transmitter of the plurality of transmitters (T-T), at least two transmitters (T-T TT) whose catchment area (B-B) includes at least one common catchment area (BBBB B), and associating the at least two transmitters (T-T TT) with a subset of transmitters (S S); identifying, within the subset of transmitters (S S), one reference transmitter (TX) and at least one secondary transmitter (TS); determining, for each secondary transmitter (TS), a respective time offset with respect to the reference transmitter (TX) on the basis of time references contained in the radio frequency signal transmitted by the reference transmitter (TX) and received by the secondary transmitter (TS); adjusting the transmission parameters of the secondary transmitter (TS) so as to keep the time offset constant. 11717. A method for synchronizing in time a plurality of transmitters (T-T) belonging to a single frequency network , said transmitters (T-T) being adapted to distribute a radio frequency signal over a territory , comprising the steps of:{'b': 1', '7', '1', '5', '6', '7', '1', '7', '12', '23', '34', '45', '67', '1', '5', '6', '7', '1', '2, 'identifying, for each transmitter of said plurality of transmitters (T-T), at least two transmitters (T-T; T,T) whose catchment area (B-B) includes at least one common catchment area (B,B,B,B; B), and associating said at least two transmitters (T-T; T,T) with a subset of transmitters (S; S);'}{'b': 1', '2, 'identifying, within said subset of transmitters (S; S), one reference transmitter (TX) and at least one secondary transmitter (TS);'}determining, for each secondary transmitter (TS), a respective time offset with respect to said reference transmitter (TX) on the basis of time references contained in said radio frequency ...

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Номер записи: 77
28-11-2013 дата публикации

Multi-Processor Platform for Wireless Communication Terminal Having a Partitioned Protocol Stack

Номер: US20130316759A1
Автор: Frederic Hayem, Leo Borromeo, Michiel Lotter
Принадлежит: Broadcom Corp

A multi-mode wireless communication device and multi-mode communication method are disclosed. The multi-mode device includes a first baseband co-processor configured to execute low-level stack operations of a first wireless communications protocol employed within a first wireless communications network. The device also includes a host baseband processor configured to execute a set of protocol stack operations of a second wireless communications protocol employed within a first wireless communications network and higher-level stack operations of the first wireless communications protocol. A data communication channel capable of carrying data received by the multi-mode wireless communication device from the first wireless communications network or sent by the multi-mode wireless communication device through the first wireless communications network is provided between at least the host baseband processor and the first baseband co-processor.

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Номер записи: 78
05-12-2013 дата публикации

Methods and Arrangement for Supporting Base Station Synchronization by use of Long Wave Signaling

Номер: US20130324173A1
Автор: Järleholm Anders Wilhelm, Lagerqvist Tomas Georg
Принадлежит: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Methods and arrangements in a support node and in connection with a base station for supporting synchronization of the base station. The methods and arrangements involve conveying high-accuracy time information via long-wave signaling to the base station, which implies e.g. that base stations in unfavorable radio conditions may be synchronized without access to reliable IP connections or similar. 116-. (canceled)17. A method in a support module for supporting synchronization of a base station in a cellular communication network , the method comprising:obtaining high-accuracy time information from a reference source, wherein the reference source is a satellite based positioning system; andproviding said time information to the base station by use of long wave signaling, thus enabling the base station to synchronize.18. The method of claim 17 , wherein the positioning system is the Global Positioning System (GPS).19. The method of claim 17 , further comprising:obtaining information related to positioning from the reference source;deriving the geographical position of the support module, based on said information related to positioning obtained from the reference source; andproviding said geographical position of the support module to the base station by use of long wave signaling.20. An arrangement in a support module for supporting synchronization of a base station in a cellular communication network claim 17 , the arrangement comprising:an obtaining circuit adapted to obtain high-accuracy time information from a reference source, wherein the reference source is a satellite based positioning system; anda providing circuit adapted to provide said time information to the base station by use of long wave signaling.21. The arrangement of claim 20 , wherein the obtaining circuit is further adapted to obtain information related to positioning from the reference source; the arrangement further comprising a determining circuit adapted to derive the geographical position of ...

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Номер записи: 79
12-12-2013 дата публикации

TANDEM SATELLITE FRAME SYNCHRONIZATION

Номер: US20130329630A1
Автор: Becker Donald W.
Принадлежит: VIASAT, INC.

Systems and methods are described synchronizing communications frames and their respective time slots for satellite communications architectures having multiple satellites in the same orbital slot in such a way that addresses inter-satellite inter-beam interference. In some embodiments, the first and second satellites communicate with a respective number of ground terminals (e.g., gateway and user terminals) according to first and second satellite time slots, respectively. The satellites maintain relative positions in their orbital slot to manifest a maximum path delay difference between first and second path delays, the first path delay being between the first ground terminals and the first satellite, and the second path delay being between the first ground terminals and the second satellite. A synchronization system can offset the first satellite time slots from the second satellite time slots as a function of the maximum path delay difference. 1. A satellite communications system comprising:a first satellite configured to relay first satellite communications for first ground terminals, the first communication synchronized according to first satellite time slots;a second satellite configured to relay second satellite communications for second ground terminals, the second satellite communications synchronized according to second satellite time slots,the first and second satellites configured to maintain relative positions in a single orbital slot to manifest a maximum path delay difference between first and second path delays, the first path delay being between the first ground terminals and the first satellite, and the second path delay being between the first ground terminals and the second satellite; anda synchronization system configured to offset the first satellite time slots from the second satellite time slots as a function of the maximum path delay difference.2. The system of claim 1 , wherein the synchronization system is configured to offset the first ...

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Номер записи: 80
12-12-2013 дата публикации

METHODS AND APPARATUS FOR WIRELESS NETWORK CONNECTIVITY

Номер: US20130329707A1
Автор: Corson Mathew Scott, Laroia Rajiv, Li Junyi
Принадлежит: QUALCOMM INCORPORATED

Methods and apparatus which allow a wireless terminal () to simultaneously maintain connections with multiple base stations () are described. Each wireless terminal () is capable of supporting multiple separate timing and/or other control loops one, for each base station connection thereby allowing the connections to operate independently and in parallel. Different control signals and/or data are transmitted on each connection that is established with a base station (). In this manner base stations () receive different data allowing for asynchronous data transmission. The data received by the base stations () can be supplied to a wired asynchronous network () without the need to combine the received data prior to supplying it to the wired network (). The communications techniques of the invention can be used to implement soft handoffs without the need to duplicate data transmissions to multiple base stations. 1. A method for communicating with a plurality of base stations , the method being implemented by a wireless terminal , the method comprising:receiving first data via a first connection between the wireless terminal and a first base station;receiving second data via a second connection between the wireless terminal and a second base station, wherein the first data is independent from the second data; andmaintaining first synchronization parameters for the first connection and second synchronization parameters for the second connection.2. The method of claim 1 , further comprising:receiving first control information on the first connection; andreceiving second control information on the second connection, wherein the first control information is different than the second control information.3. The method of claim 1 , further comprising:performing first synchronization operations for the first connection; andperforming second synchronization operations for the second connection, wherein the first and second synchronization operations are performed in parallel.4. ...

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Номер записи: 81
19-12-2013 дата публикации

Synchronization of Mobile Client Multicast

Номер: US20130336194A1
Автор: Ananthanarayanan Shankar Kambat, Verma Ravinder
Принадлежит: ARUBA NETWORKS, INC.

A method includes subsequent to a client associating with a first access node and the client being communicatively coupled with a first controller through the first access node: storing information on one or more of: active broadcast sessions for the client or active multicast sessions for the client. The method further includes subsequent to the client associating with a second access node and the client being communicatively coupled with a second controller through the second access node: the second controller establishing one or more of: the active broadcast sessions for the client or the active multicast sessions for the client using the information. 1. A non-transitory computer readable medium comprising instructions which , when executed by one or more processors on one or more devices , causes performance of operations comprising:subsequent to a client associating with a first access node and the client being communicatively coupled with a first controller through the first access node: storing information on one or more of: active broadcast sessions for the client or active multicast sessions for the client;subsequent to the client associating with a second access node and the client being communicatively coupled with a second controller through the second access node:detecting, by the second controller, that the client is communicatively coupled to the second controller through the second access node;responsive at least to detecting that the client is communicatively coupled to the second controller: sending, by the second controller, an inquiry for the information on one or more of: the active broadcast sessions for the client or the active multicast sessions for the client;receiving, by the second controller, the information on one or more: the active broadcast sessions for the client or the active multicast sessions for the client;using, by the second controller, the information to establish one or more of: the active broadcast sessions for the client or ...

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Номер записи: 82
19-12-2013 дата публикации

REDUCING PACKET LOSS IN A MOBILE DATA NETWORK WITH DATA BREAKOUT AT THE EDGE

Номер: US20130336208A1
Автор: Billau Ronald L., Cillis Canio, Di Luoffo Vincenzo V., Leschke Ekkart
Принадлежит: INTERNATIONAL BUSINESS MACHINES CORPORATION

A breakout system initiates radio link control (RLC) resets to resynchronize data communication to improve quality of experience for the user. Synchronization of radio traffic is monitored and maintained by the breakout system. When data is broken out, the RLC function is split into two different flows, between the user equipment (UE) and the breakout system and between the breakout system and the radio network controller (RNC). When the sequence numbers of the two flows become out of sync the ciphering context will become out of synchronization resulting in errors. The breakout system can initiate an RLC reset into both of these flows to resynchronize the data communication to improve user's quality of experience. 1. A method for a breakout system to utilize a radio link control (RLC) reset command synchronization during breakout in a mobile data network with a breakout system , the method comprising the steps of:(A) a plurality of antennas sending and receiving network messages between user equipment and a plurality of basestations in the radio access network, each basestation communicating with a corresponding one of the plurality of antennas; 1) breaking out a data session to a user equipment (UE);', '2) monitoring network traffic to and from the breakout system;', '3) determining if sequence numbers between a first RLC entity and a second RLC entity are out of synchronization; and', '4) where the sequence numbers are out of synchronization, performing an RLC reset towards the UE and towards a radio network controller (RNC) in a core network to bring the first RLC entity and the second RLC entity back into synchronization., '(B) a data offload gateway in the breakout system associated with one of the plurality of basestations performing the steps of2. The method of wherein the network traffic monitored by the data offload gateway is a first sequence number in a service data unit (SDU) queue in an RLC data structure maintained by the first RLC entity and a second ...

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Номер записи: 83
19-12-2013 дата публикации

Uplink Transmission Timing

Номер: US20130336268A1
Автор: Better David, Heiser Franz, Tynderfeldt Tobias
Принадлежит: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Embodiments herein relates to a method in a radio base station () for handling a timing of uplink transmission from a user equipment () to the radio base station () in a radio communications network. The user equipment () is served in a cell () controlled by the radio base station (), and which radio base station () and user equipment () are comprised in the radio communications network. The communications in the cell () are organized in radio frames comprising subframes. The radio base station () receives a first uplink transmission from the user equipment () in a subframe related to the radio base station (). The radio base station then estimates a time parameter value based on a distance between the user equipment () and the radio base station () when the first uplink transmission is transmitted from the user equipment (). The radio base station () then sets a time value (N) in a message, which time value (N) is to be used to set a timing of a second uplink transmission at the user equipment (). The time value (N) is based on the estimated time parameter value and a time offset value (ΔT). The radio base station () then transmits the message comprising the time value (N) to the user equipment. 116-. (canceled)17. A method in a radio base station for handling a timing of uplink transmissions from a user equipment to the radio base station in a radio communications network , which user equipment is served in a cell controlled by the radio base station , and which radio base station and user equipment are comprised in the radio communications network , in which cell communications are organized in radio frames comprising subframes , the method comprisingreceiving a first uplink transmission from the user equipment in a subframe related to the radio base station;estimating a time parameter value based on a distance between the user equipment and the radio base station when the first uplink transmission is transmitted from the user equipment;setting a time value in a ...

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Номер записи: 84
19-12-2013 дата публикации

Carrier Grouping in Multicarrier Wireless Networks

Номер: US20130336296A1
Автор: Esmael Hejazi Dinan
Принадлежит: Individual

A base station transmits an RRC message to modify a first cell group index of a first cell. If the first cell is a primary cell, the RRC message reconfigures the primary cell as a secondary cell with an updated first cell group index and the RRC message comprises mobility control information. If the first cell is a secondary cell, the RRC message releases the secondary cell and adds the secondary cell with an updated first cell group index without employing mobility control information.

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Номер записи: 85
02-01-2014 дата публикации

SUPPORTING COORDINATED UNIVERSAL TIME IN LTE

Номер: US20140003417A1
Автор: Lee Kuo-Chun, Maheshwari Shailesh, Shauh Jack Shyh-Hurng
Принадлежит:

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives a CDMA system time from a SIB. The apparatus receives information indicating a number of leap seconds. The information may be received through provisioning information at boot up, a USD, or other means. The apparatus determines a UTC based on the received CDMA system time and the number of leap seconds. The apparatus applies the determined UTC. The apparatus may receive an eMBMS service based on the determined UTC. 1. A method of wireless communication , comprising:receiving a code division multiple access (CDMA) system time from a system information block (SIB);receiving information indicating a number of leap seconds;determining a coordinated universal time (UTC) based on the received CDMA system time and the number of leap seconds; andapplying the determined UTC.2. The method of claim 1 , wherein the information is provisioning information.3. The method of claim 1 , wherein the information is received in a user service description (USD).4. The method of claim 1 , wherein the information includes a start time for an application of the number of leap seconds claim 1 , and the UTC is further determined based on the start time.5. The method of claim 4 , wherein the information includes a flag indicating by how much the number of leap seconds is increasing or decreasing at the start time from a previous number of leap seconds claim 4 , and the UTC is further determined based on the flag.6. The method of claim 5 , wherein the UTC is determined based on the CDMA system time CDMA claim 5 , the number of leap seconds n claim 5 , and the flag f as follows: {'br': None, 'sub': 'ST', 'i': '−n+f,', 'UTC=CDMA'}, 'if a current time is earlier than the start time, then'} {'br': None, 'sub': 'ST', 'i': '−n.', 'UTC=CDMA'}, 'otherwise if the current time is later than or equal to the start time, then'}7. The method of claim 1 , further comprising receiving a ...

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Номер записи: 86
02-01-2014 дата публикации

SYSTEMS AND METHODS FOR SYNCHRONIZING BETWEEN AN IN-VIVO DEVICE AND A LOCALIZATION SYSTEM

Номер: US20140003418A1
Автор: Khait Semion, Rosenberg Oren
Принадлежит:

An in-vivo device may allocate a sensing window in a work cycle for sensing and processing localization signals to determine the location/orientation of the in-vivo device. The in-vivo device may use a timing unit to schedule transmission of data frames and the sensing of the localization signals relative to a reference time embedded in work cycles. The timing unit may produce a clock signal based on which the in-vivo device may measure time specifics, which define the sensing window, relative to the reference time. A receiver may use data embedded in data frames to restore the clock signal and the reference time, and, from them, and using identical or similar time specifics, generate a synchronization signal for a localization signals source (LSS) to enable the LSS to generate localization signals in synchronization with the sensing windows. 1. A method for timing sensing of localization signals by an in-vivo device , the method comprising: (i) transmitting a data frame to a receiver, the data frame comprising data facilitating generation of a synchronization signal for a localization signals source by the receiver based on the clock pulse, the reference time, and on time specifics of the sensing time window;', '(ii) measuring time elapsing from the reference time by using the clock signal;', '(iii) sensing, based on the elapsed time, during a time period complying with the time specifics of the sensing time window, one or more localization signals externally transmitted by a localization signals source at times and for duration specified by the synchronization signal; and', 'producing localization data representative of the sensed localization signals., 'by an in-vivo device operating according to a sensing time window within a work cycle of the in-vivo device, the in-vivo device timing the work cycle using a clock signal and having defined within the work cycle a reference time, performing during the work cycle2. The method as in claim 1 , wherein the sensing ...

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Номер записи: 87
16-01-2014 дата публикации

SYNCHRONIZATION DEVICE AND SYNCHRONIZATION METHOD

Номер: US20140016543A1
Автор: KUWABARA Toshihide
Принадлежит: NEC Corporation

A synchronization device has a normal-signal generator, a reference-signal generator, and a phase difference detector. The normal-signal generator generates a normal signal whose timing is synchronized with a time signal from a satellite. The reference-signal generator generates a reference signal whose timing is synchronized with a received signal. The phase difference detector detects the phase difference between the reference signal and the normal signal. The normal-signal generator then controls the normal signal on the basis of the phase difference when the time signal cannot be obtained. 1. A synchronization device comprising:a normal-signal generator that generates a normal signal whose timing is synchronized with a time signal from a satellite;a reference-signal generator that generates a reference signal whose timing is synchronized with a received signal; anda phase difference detector that detects a phase difference between said reference signal and said normal signal;wherein said normal-signal generator, when said time signal cannot be obtained, controls said normal signal based on said phase difference.2. The synchronization device as set forth in claim 1 , wherein:said phase difference detector detects said phase difference in advance by statistically processing a phase of said reference signal and a phase of said normal signal while said time signal is being obtained; andwhen said time signal cannot be obtained, said normal-signal generator controls said normal signal such that the phase difference between said reference signal and said normal signal matches said phase difference that was detected in advance by said phase difference detector.3. The synchronization device as set forth in claim 1 , wherein said normal-signal generator: carries out statistical processing of a control signal used in control of said normal signal while said time signal is being obtained and holds the result; when in a state in which said time signal cannot be obtained ...

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Номер записи: 88
16-01-2014 дата публикации

METHOD AND APPARATUS FOR REDUCING UPLINK TRANSMISSION DELAY IN WIRELESS COMMUNICATION SYSTEM USING CARRIER AGGREGATION

Номер: US20140016559A1
Автор: Jang Jae Hyuk, JEONG Kyeong In
Принадлежит:

The present invention proposes a method of sending a UE the timing advance information per carrier group promptly and commanding preamble transmission, and activating secondary carriers in a wireless communication system supporting carrier aggregation technology using uplink transmission timings for the respective carrier groups. Through the present invention, the UE is capable of configuring the timing advance information of the carrier group promptly and activating the secondary carrier quickly, resulting in reduction of uplink transmission delay. 1. An uplink transmission method of a terminal in a wireless communication system supporting carrier aggregation technology with a primary cell and at least one secondary cell , the method comprising:receiving a timing information for used in calculating timing advance of the secondary cell;calculating the timing advance of the second cell using the timing information; andtransmitting the uplink data by adjusting uplink timing according to the timing advance of the secondary cell while a time alignment timer of the secondary cell is running.2. The method of claim 1 , wherein the timing information is an offset relative to the uplink timing of the primary cell activated currently.3. The method of claim 2 , wherein the calculating of the timing advance comprises calculating the timing advance of the secondary cell using the uplink timing of the primary cell and an offset relative to the uplink timing of the primary cell.4. The method of claim 3 , wherein the receiving of the timing information comprises receiving the timing information through a carrier aggregation configuration control message for aggregating the secondary cell to the primary cell.5. The method of claim 3 , wherein the receiving of the timing information comprises receiving the timing information through a carrier activation message for activating the secondary cell.6. The method of claim 1 , further comprising:receiving, before the receiving of the ...

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Номер записи: 89
16-01-2014 дата публикации

Method, Apparatus And Computer Program Product For Triggering The Determination Of A Timing Advance For One Component Carrier Based Upon Another Component Carrier

Номер: US20140016623A1
Автор: David Randall, Erlin Zeng, Haiming Wang, Jing HAN, Wei Bai
Принадлежит: Renesas Mobile Corp

A method, apparatus and computer program product are provided to facilitate the determination of the timing advances of each of a plurality of component carriers by triggering the determination of the timing advances in response to certain pre-defined events that are indicative of a need for the timing advance to be determined. A method may include determining that a pre-defined event has occurred and triggering a determination of a timing advance for a second component carrier relative to a timing advance of a first component carrier based upon occurrence of the predefined event. In this regard, both the component carriers are concurrently allocated to a mobile terminal. The method may also utilize the timing advance to synchronize communications on the second component carrier between the mobile terminal and a network. A corresponding apparatus and computer program product may also be provided.

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Номер записи: 90
16-01-2014 дата публикации

MIMO SLOTTED ALOHA (MSA) SYSTEM

Номер: US20140016626A1
Автор: Dai Qingyuan, Woloszynski Charles H.
Принадлежит: Elbit Systems of America, LLC

A method including receiving at a synchronizing node a first reference frame from a first reference node at a first time and storing a first time value representing the first time, and calculating a timing estimator by subtracting a minimum time value, representing the distance from the synchronizing node to the first reference node, from the first time value. The method includes receiving at the synchronizing node a second reference frame at a second time and transmitting from the synchronizing node to the first reference node a short tuning contention time frame. The method includes receiving at the synchronizing node from the first reference node an arrival time value representing the time at which the first reference node received the short timing contention frame and calculating a time drift from the first arrival time value and the second time value and adjusting the timing estimator based on the time drift. 1. A method comprising:receiving at a synchronizing node a first reference frame from a first reference node at a first time and storing a first time value representing the first time;calculating a timing estimator by subtracting a minimum time value, representing the distance from the synchronizing node to the first reference node, from the first time value;receiving at the synchronizing node a second reference frame at a second time and storing a second time value representing the second time;transmitting from the synchronizing node to the first reference node a short timing contention time frame;receiving at the synchronizing node from the first reference node an arrival time value representing the time at which the first reference node received the short timing contention frame;calculating a first time drift from the first arrival time value and the second time value;adjusting the timing estimator based on the first time drift; andtransmitting from the synchronizing node a frame according to a timing determined from the timing estimator.2. The method ...

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Номер записи: 91
23-01-2014 дата публикации

TRANSFER OF SYNCHRONIZATION IN A HYBRID GLOBAL NAVIGATION SATELLITE PACKET NETWORK SYSTEM

Номер: US20140023063A1
Автор: IRVINE Garry
Принадлежит: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Networks, network devices and methods of synchronization using transfer of synchronization packets are provided. Some network devices are configured to use either a timing reference extracted based on GPS signals or an imported timing reference, as an operative time reference. A network device from which to import the time reference is selected and may be updated to meet a selection rule related to the quality of receiving the transfer of synchronization packets. 1. A network device comprising:a global position signal (GPS) receiver configured to receive GPS signals and to determine a time reference based on the received GPS signals;a switching part configured to communicate transfer of synchronization packets;an operative part configured to manage radio communication using an operative time reference; anda controller configured to switch the operative part between at least (i) a first mode, in which the operative part uses, as the operative time reference, the time reference determined by the GPS receiver and (ii) a second mode, in which the operative part uses the operative time reference determined using one or more imported time references, each of the imported time references being extracted from the transfer of synchronization packets communicated with a network device, the controller switching the operative part between the first mode and the second mode depending on a quality of the received GPS signals and a quality of communicating the transfer of synchronization packets by the switching part from each of at least one other network device, respectively.2. The network device of claim 1 , wherein the switching part is configured to process packets based on a priority associated to each packet claim 1 , the transfer of synchronization packets having the highest priority.3. The network device of claim 1 , wherein the controller is configuredto select a network device among the network devices from which the switching part communicates transfer of ...

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Номер записи: 92
30-01-2014 дата публикации

PROPAGATION DELAY DIFFERENCE REPORTING FOR MULTIPLE COMPONENT CARRIERS

Номер: US20140029586A1
Автор: AOYAMA Takahisa, Feuersaenger Martin, LOEHR Joachim, Suzuki Hidetoshi, Tamura Takashi, Wengerter Christian
Принадлежит: Panasonic Corporation

The invention relates to methods for reporting on downlink timings by a mobile terminal in a mobile communication system. In order to allow for an aggregation access point to obtain information on propagation delay differences of downlink transmissions on aggregated serving cells, the invention suggests the mobile terminal to report timing information based on reception time difference information for a the target/reference cell. The mobile terminal performs measurements relating to transmission and/or reception time differences on the target/reference cell, and reports same to the eNodeB. The eNodeB compares the measurement result to a predefined maximum propagation delay time difference. Alternatively, the mobile terminal performs the measurements, compares same to the predefined maximum propagation delay time difference and then report the comparison result to the eNodeB. 199.-. (canceled)100. A method for time aligning uplink transmissions by a mobile terminal in a mobile communication system , wherein the mobile terminal is configured with a first radio cell comprising a downlink component carrier and a time aligned uplink component carrier , and a second radio cell comprising a downlink component carrier and a non-time aligned uplink component carrier , the method comprising the following steps:determining by the mobile terminal a reception time difference or propagation delay difference for downlink transmissions from an aggregation access point to the mobile terminal via the downlink component carrier of the first radio cell and via the downlink component carrier of the second radio cell, respectively, andtime aligning the uplink component carrier of the second radio cell by adjusting a timing advance for uplink transmissions on the uplink component carrier of the second radio cell based on the timing advance for uplink transmissions on the time aligned uplink component carrier of the first radio cell and the determined reception time difference, so that ...

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Номер записи: 93
30-01-2014 дата публикации

APPARATUS AND METHOD FOR GENERATING SYNCHRONIZATION CHANNEL IN A WIRELESS COMMUNICATION SYSTEM

Номер: US20140029590A1
Автор: CHO Jae-Weon, Choi Seung-Hoon, HONG Song-Nam, LIM Chi-Woo, PARK Sung-Eun
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A Synchronization Channel (SCH) transmission method includes generating a Primary SCH (P-SCH) sequence according to supplementary information. The supplementary information includes at least one of Base Station (BS) type information, Fast Fourier Transform (FFT) size information, BandWidth (BW) information, group information, sector information, and carrier type information. The method also includes modulating the P-SCH sequence and mapping the modulated P-SCH sequence to subcarriers within a predefined subcarrier set. The subcarriers are included in the subcarrier set being spaced one subcarrier interval apart. The method further includes generating a P-SCH symbol by Orthogonal Frequency Division Multiplexing (OFDM)-modulating the P-SCH sequence mapped to the subcarriers, and transmitting the P-SCH symbol. 1. An apparatus for use in a base station in a wireless communication system , the apparatus comprising:a sequence generator configured to generate a preamble sequence based on a carrier configuration and a bandwidth;a modulator configured to modulate the preamble sequence;a subcarrier mapper configured to map the modulated preamble sequence to subcarriers within a predefined subcarrier set that is determined by a predefined rule; anda transmitter configured to transmit the preamble sequence, wherein the carrier configuration is one of a fully configured carrier which is a carrier for which all control channels including synchronization, broadcast, multicast and unicast control signaling are configured, and a partially configured carrier which is a downlink only carrier configured with control channels to support downlink transmission.2. The apparatus of claim 1 , wherein a length of the preamble sequence is equal to ‘216’.3. The apparatus of claim 2 , wherein the subcarriers in the predefined subcarrier set are spaced one subcarrier interval apart7. The apparatus of claim 6 , further comprising:an Orthogonal Frequency Division Multiplexing (OFDM) modulator ...

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Номер записи: 94
30-01-2014 дата публикации

Apparatus and method for communicating user equipment specific information in cellular communication system

Номер: US20140029592A1
Автор: Nicholas William Anderson
Принадлежит: Sony Corp

A cellular communication system comprises a base station ( 101 ) and a plurality of user equipment ( 103 ). The base station ( 101 ) comprises a combine processor ( 111 ) which combines user equipment specific information, such as power control commands or synchronisation information, for a plurality of user equipment ( 103 ). An encode processor 113 encodes the combined user equipment specific information and a transceiver 109 transmits the combined user equipment specific information in a minimum transmission resource unit of the cellular communication system. The minimum transmission resource unit may be a single channelisation code in a single time slot. The UE ( 103 ) comprises a receiver ( 115 ) for receiving the minimum transmission resource unit and a UE data processor ( 117 ) which decodes the minimum transmission resource unit and extracts the user equipment specific information for that UE ( 103 ). The invention may provide a more efficient communication of small data blocks.

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Номер записи: 95
30-01-2014 дата публикации

Sequence generating method for efficient detection and method for transmitting and receiving signals using the same

Номер: US20140029602A1
Автор: Dong Cheol Kim, Hyun Woo Lee, Jin Sam Kwak, Min Seok Noh, Seung Hee Han, Yeong Hyeon Kwon
Принадлежит: LG ELECTRONICS INC

A sequence generation method for allowing a reception end to effectively detect a sequence used for a specific channel of an OFDM communication system, and a signal transmission/reception method using the same are disclosed. During the sequence generation, an index is selected from among the index set having the conjugate symmetry property between indexes, and a specific part corresponding to the frequency “0” is omitted from a transmitted signal. In addition, a reception end can calculate a cross-correlation value between a received (Rx) signal and each sequence using only one cross-correlation calculation based on the conjugate symmetry property.

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Номер записи: 96
30-01-2014 дата публикации

METHOD AND DEVICE FOR TIME-SYNCHRONIZATION IN AD HOC NETWORK

Номер: US20140029603A1
Автор: INAO Yuichi, Koga Syunsuke, KUROGI Yasuhiro, NOMURA Yayoi, OKAMASU Takayuki D., Yamada Kenji
Принадлежит: FUJITSU LIMITED

A method and a device perform time-synchronization with an ad hoc network configured by a plurality of nodes. The method includes: transmitting a time-synchronization request frame including an address of one of the plurality of nodes which belong to the ad hoc network to one of the plurality of nodes having a function of receiving the time-synchronization request frame and transmitting a time-synchronization reply frame including time-synchronization information; receiving the time-synchronization reply frame including the time-synchronization information from one of the plurality of nodes which receive the time-synchronization request frame; and performing time-synchronization with one of the plurality of nodes using the time-synchronization information included in the time-synchronization reply frame. 1. A method for time synchronization between an ad hoc network which is configured by a plurality of time-synchronized nodes and a new node , the method comprising:transmitting a time-synchronization request frame including an address of one of the plurality of nodes which belong to the ad hoc network to one of the plurality of nodes having a function of receiving the time-synchronization request frame and transmitting a time-synchronization reply frame including time-synchronization information;receiving the time-synchronization reply frame including the time-synchronization information from one of the plurality of nodes which receive the time-synchronization request frame; andperforming time-synchronization with one of the plurality of nodes using the time-synchronization information included in the time-synchronization reply frame.2. A method for time synchronization between an ad hoc network which is configured by a plurality of time-synchronized nodes and a new node , the method comprising:receiving a message including an address of one of the plurality of nodes which belong to the ad hoc network from one of the plurality of nodes having a function of receiving ...

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Номер записи: 97
30-01-2014 дата публикации

COMMUNICATING TIME INFORMATION IN A NETWORK TO ENABLE SYNCHRONIZATION

Номер: US20140029604A1
Автор: Nicholls Charles W.T., Ouellette Michel
Принадлежит: ROCKSTAR CONSORTIUM US LP

A first node in a network receives a timing packet containing time information, where the timing packet is originated by a time server. The first node then updates the time information in the timing packet to reflect a delay associated with communicating the timing packet over a network link. The first node then updates the time information in the timing packet to reflect the delay associated transfer of the timing packet through the node. The first node sends the timing packet with the updated time information to a second node to enable the second node to use the updated time information for synchronization of the second node. The process repeats across an arbitrary number of nodes to enable time alignment between the first node and final destination node. 1. A method comprising:receiving, at a first node in a network, a timing packet comprising time information, the timing packet being originated by a time server; a delay associated with communicating the timing packet to the first node over a network link to which the first node is connected; and', 'a delay experienced by the timing packet in transit through the first node determined using a local clock of the first node, the local clock of the first node having a lower accuracy than a clock associated with the time server; and, 'updating, by the first node, the time information in the timing packet to indicate a cumulative delay comprisingsending, by the first node, the timing packet with the updated time information to a second node to enable the second node to use the updated time information for synchronization of the second node.2. The method of claim 1 , wherein the time information in the received timing packet comprises information indicating a time at which the timing packet was originated by the time server.3. The method of claim 2 , wherein:the timing packet is received from a third node of the network; andthe time information in the received timing packet comprises information indicating a cumulative ...

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Номер записи: 98
30-01-2014 дата публикации

Frame sync across multiple channels

Номер: US20140029701A1
Автор: Adam E. Newham, Brian F. MILLER, Joel Benjamin Linsky, Kevin Wayne BARTIG, Rohit Sauhta
Принадлежит: Qualcomm Inc

Systems, methods, and devices synchronize data streams by hashing received data frames to generate a sequence of hash values, comparing the generated hash value sequence to a hash value sequence received in a control stream, and processing data frames when the hash value sequences match. A source device and multiple receiver devices may synchronize audio data encoded in data frames, applying a hash function to each data frame to generate a first sequence of hash values, transmitting the data frames on a first channel and the first sequence of hash values on a control channel, receiving the data frames and the first sequence of hash values in the receiver devices, applying the hash algorithm to received data frames to generate a second sequence of hash values, comparing the first and second sequences of hash values, and processing data frames when the first and second sequences of hash values match.

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Номер записи: 99
06-02-2014 дата публикации

MOBILE COMMUNICATION METHOD

Номер: US20140036890A1
Автор: Iwamura Mikio, Uchino Tooru
Принадлежит: NTT DOCOMO, INC.

Provided is a mobile communication method, in which in direct communication between a mobile station UE# and a mobile station UE# synchronization between the mobile station UE# and the mobile station UE# is appropriately established. A mobile communication method according to the present invention includes a step of transmitting, by the mobile station UE# “Timing information #” indicating deviation of a reception timing of “Ud preamble #” from a desired timing to a radio base station eNB on the basis of a received “Ud preamble #”, and a step of transmitting, by the radio base station eNB, a “Ud TA command #” for adjusting a transmission timing of a data signal in the third radio link to the mobile station UE# on the basis of received “Timing information # 1. A mobile communication method , used in a case where a first radio link has been set in a radio base station interface between a first mobile station and a radio base station , a second radio link has been set in a radio base station interface between a second mobile station and the radio base station , and a third radio link has been set in an inter-mobile station interface between the first mobile station and the second mobile station , comprising:a step of transmitting, by the first mobile station, a synchronization request signal to the radio base station via the first radio link when generation of a data signal to be transmitted to the second mobile station is detected in a state in which synchronization of the third radio link has not been established;a step of notifying, by the radio base station, the first mobile station and the second mobile station of a radio resource for first preamble transmission in the third radio link via the first radio link and the second radio link in response to the synchronization request signal;a step of transmitting, by the first mobile station, a first preamble to the second mobile station by using the radio resource for first preamble transmission;a step of transmitting, ...

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Номер записи: 100