Time Division Patents (Class 370/294)
  • Publication number: 20110134778
    Abstract: A method and MS apparatus for receiving a signal in a wireless communication system supporting a plurality of wireless communication schemes are disclosed. The method for receiving a signal in a wireless communication system supporting both communication of a first MS using a first wireless communication scheme and communication of a second MS using a second wireless communication scheme includes receiving from a BS a downlink signal in a downlink subframe allocated to a second zone dedicated to communication of the second MS in a downlink zone of a specific frame by the second MS. The number of downlink subframes allocated to the second zone by the BS is one, the allocated downlink subframe is a first downlink subframe of the second zone, and the first downlink subframe of the second zone is a Type-2 subframe which consists of seven OFDMA symbols.
    Type: Application
    Filed: December 9, 2010
    Publication date: June 9, 2011
    Applicant: LG ELECTRONICS INC.
    Inventors: Dong Guk LIM, Han Gyu CHO, Jin Young CHUN, Jin Sam KWAK
  • Patent number: 7957327
    Abstract: Systems and methodologies are described that facilitate providing time-division duplexed beam-forming support in traditionally non-time-division duplexed wireless systems, such as an OFDMA system, a WCDMA system, etc. According to an aspect, a base station can analyze pilot information, such as a portion of bandwidth over which a user device is transmitting, and can transmit on the downlink using pre-hopped portion of bandwidth utilized by the user device on the preceding reverse link time slot. The base station can additionally transmit bandwidth segment reassignments to the user device to facilitate bandwidth segment hopping between user devices served by the base station. Additionally, the base station can instruct the user device to provide on-demand pilot information to resolve ambiguity related thereto.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: June 7, 2011
    Assignee: Qualcomm Incorporated
    Inventors: Aamod Khandekar, Arak Sutivong, Ravi Palanki
  • Patent number: 7953051
    Abstract: A relay transmission method and apparatus are provided. The method includes: configuring a subframe of a Time Division Duplex (TDD) relay frame for a subframe of relay link (S201), where the configuring the subframe of the TDD relay frame for the subframe of relay link includes: configuring a downlink (DL) subframe of the TDD relay frame for a DL subframe of relay link, and/or configuring the DL subframe of the TDD relay frame for an uplink (UL) subframe of relay link, and/or configuring a UL subframe of the TDD relay frame for the UL subframe of relay link; and performing relay transmission according to the subframe of relay link (S202). When data is transmitted, a subframe that can be used for relay link transmission is configured, data transmission performed by using relay link complies with inherent constraints of a TDD frame structure in the prior art.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: May 31, 2011
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Zhongfeng Li, Zheng Shang
  • Patent number: 7953050
    Abstract: A relay transmission method and apparatus are provided. The method includes: configuring a subframe of a Time Division Duplex (TDD) relay frame for a subframe of relay link (S201), where the configuring the subframe of the TDD relay frame for the subframe of relay link includes: configuring a downlink (DL) subframe of the TDD relay frame for a DL subframe of relay link, and/or configuring the DL subframe of the TDD relay frame for an uplink (UL) subframe of relay link, and/or configuring a UL subframe of the TDD relay frame for the UL subframe of relay link; and performing relay transmission according to the subframe of relay link (S202). When data is transmitted, a subframe that can be used for relay link transmission is configured, data transmission performed by using relay link complies with inherent constraints of a TDD frame structure in the prior art.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: May 31, 2011
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Zhongfeng Li, Zheng Shang
  • Patent number: 7948924
    Abstract: A Radio Frequency (RF) front-end apparatus in a wireless communication system is provided. The apparatus includes a plurality of BandPass Filters (BPFs) for band-pass filtering a transmission signal or a reception signal, at least one circulator for dividing a signal transmission path and a signal reception path and at least one switch for controlling the signal transmission path and the signal reception path. The RF front-end apparatus provided by the present invention supports various frequency bands and optionally supports TDD and FDD in a wireless communication system.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: May 24, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Cheol-Soo Seo
  • Patent number: 7940693
    Abstract: The invention discloses a wireless communication system for calculating time of flight. The system transmits and receives a plurality of packets every a plurality of delay times. Thereafter, the wireless communication system calculates a plurality of reference times according to the delay times and processing times and then averages the reference times to obtain the time of flight. Thereby, the time of flight can be calculated more accurately.
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: May 10, 2011
    Assignee: Quanta Computer Inc.
    Inventor: Kai-Wen Tien
  • Patent number: 7937063
    Abstract: A method and system for protecting a LNA by acquiring a radio frequency control channel signal at a tower top low noise amplifier (TTLNA) system. In response to acquiring the radio frequency control channel signal, LNA mode information is determined from the acquired radio frequency control channel signal. Based at least in part on the determination, the TTLNA is configured to either receive mode when the LNA mode information indicates receive mode or transmit mode when the LNA mode information indicates transmits mode. In an exemplary embodiment, the TTLNA is configured to receive mode only after a determination is made that there is no transmit energy present on the feedline connecting the BTS and the antenna. In another exemplary embodiment, the TTLNA is initialized in transmit mode.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: May 3, 2011
    Assignee: Clear Wireless LLC
    Inventors: Walter F. Rausch, David A. Maples
  • Publication number: 20110096703
    Abstract: Methods and apparatuses are disclosed that provide flexible use of a shared radio resource. An apparatus determines from monitoring signal energy on a shared radio resource whether other transmitters are present. A predetermined set of time division duplex (TDD) signaling patterns are identified. A correlation is performed between signal energy received on the shared radio resource and the predetermined TDD signaling patterns. The apparatus may then determine a TDD signaling pattern that may reduce or avoid interference with any other transmitters using the shared resource. The shared radio resource may be, for example, a shared frequency spectrum. Efficient allocation of radio resources among apparatuses such as radio transceivers, without fixed time references or predetermined patterns, may be obtained. The radio transceivers may be base stations or mobile user equipment in a wireless communications system. The apparatus may be an integrated circuit, a portion thereof, or chipset.
    Type: Application
    Filed: June 20, 2008
    Publication date: April 28, 2011
    Applicant: NOKIA CORPORATION
    Inventors: Markus Nentwig, Pekka Jänis
  • Publication number: 20110096702
    Abstract: A method for sending a physical broadcast channel in the TDD system is disclosed, which is: a signal of a physical broadcast channel is not sent in a pilot position, and the signal of the physical broadcast channel is sent on 4 OFDM symbols of the first subframe of one radio frame. Through the present invention, the extension requirement of the physical broadcast channel capacity in the TDD can be met, and the system complexity is reduced due to the normal cyclic prefix and extended prefix using the same sending method.
    Type: Application
    Filed: October 17, 2008
    Publication date: April 28, 2011
    Applicant: ZTE CORPORATION
    Inventors: Bo Dai, Shuqiang Xia, Chunli Liang, Peng Hao, Guanghui Yu, Liujun Hu, Bin Yu
  • Publication number: 20110085479
    Abstract: A portable device, such as a mobile terminal or user equipment, for encoding uplink acknowledgments to downlink transmissions. The portable device includes a receiver configured to receive a plurality of data blocks, such that each of the data blocks include an associated cyclic redundancy check (CRC), and a processor configured to determine received status for each of the data blocks by checking the CRC of each of the data blocks. The portable device further includes a transmitter for transmitting a response sequence which indicates the received status of all of the data blocks.
    Type: Application
    Filed: December 17, 2010
    Publication date: April 14, 2011
    Inventors: Bong Hoe KIM, Young Woo Yun, Ki Jun Kim, Eun Sun Kim, Joon Kui Ahn, Suk Hyon Yoon, Dong Youn Seo, Hak Seong Kim, Jung Hoon Lee, In Jae Jung
  • Patent number: 7920539
    Abstract: A system and method is disclosed for allowing communications between a base station and a group of mobile transceivers in a communications network used for a merchant facility.
    Type: Grant
    Filed: August 26, 2004
    Date of Patent: April 5, 2011
    Assignee: HM Electronics, Inc.
    Inventors: Thomas Stanford, Scott Hoeptner
  • Patent number: 7911984
    Abstract: A method and system for using half-duplex base stations and half-duplex nodes in a Frequency Division Duplexing region to provide wireless connectivity between the half-duplex base stations and customers in multiple sectors of a cell. The method and system can use two physical channels to form two logical channels. Each logical channel shares both physical channels during alternating frames of time. The half-duplex nodes can include a millimeter-wave band frequency synthesizer configured to transmit and receive on different channels to and from the half-duplex base station. Re-use patterns of the physical channels are used for deployment of half-duplex base stations and half-duplex nodes in the FDD region to minimize co-channel interference and interference due to uncorrelated rain fade. Additional methods and systems utilize full-duplex base stations and smart antenna to communicate with the half-duplex nodes.
    Type: Grant
    Filed: January 3, 2008
    Date of Patent: March 22, 2011
    Assignee: Harington Valve, LLC
    Inventors: Kenneth L. Stanwood, Israel Jay Klein
  • Publication number: 20110044217
    Abstract: A data transmission technique where high speed data is transmitted differentially in a forward channel by way of a serial link, and relatively low speed data is differentially modulated onto the forward channel signal for transmission in a reverse channel via the link. By utilizing differential modulation in both forward and reverse channels, the resulting signal has a common mode voltage that is substantially constant, resulting in low EMI. The spectral content of the signal associated with the high speed data may be substantially non-overlapping with the spectral content of the signal associated with the low speed data. This facilitates the recovery of the high speed data and low speed data with minimal interference. The differential signaling lends itself for communicating data via an inexpensive medium, such as twisted wire pair or parallel PCB traces. The data transmission technique applies to various communication network topologies: point-to-point, daisy-chain, and point-to-multiple points.
    Type: Application
    Filed: August 21, 2009
    Publication date: February 24, 2011
    Applicant: Maxim Integrated Products, Inc.
    Inventors: Qiang Wu, Caglar Yilmazer, Mustafa Ertugrul Oner
  • Publication number: 20110038277
    Abstract: A method and equipment for determining the transmission resource of channel quality indicator are disclosed. They are applied in Time Division Duplex TDD system and Half Duplex-Frequency Division Duplex HD-FDD system when Discontinuous Reception DRX operation is adopted. The method includes the following steps: determining the location of the downlink subframe where the start point of monitoring Physical Downlink Control Channel PDCCH in DRX cycle is located; determining whether the transmission resource used for transmitting the Channel Quality Indicator CQI is an uplink subframe previous to the determined location or one or more uplink subframes after the determined location. Availability of the CQI information when performing downlink schedule is guaranteed, and the transmission resource used for transmitting CQI can be effectively saved.
    Type: Application
    Filed: April 29, 2009
    Publication date: February 17, 2011
    Applicant: CHINA MOBILE COMMUNICATIONS CORPORATION
    Inventors: Zhenping Hu, Xiaodong Xu
  • Publication number: 20110032854
    Abstract: An arrangement of hybrid couplers, selectively removing RF amplifiers from a receiving path from an antenna back to a receiver in response to an event, the event switching impedances of switchable impedances connecting to ports of the hybrid couplers, between a matching impedance and mismatching impedance. The matching and mismatching impedances change coupling characteristics of the hybrid couplers between a normal coupling and a bypass coupling. In the normal coupling the hybrid couplers provide port-to-port coupling placing the RF amplifiers within the receiving path and, in the bypass coupling, the hybrid couplers provide port-to-port coupling bypassing the RF amplifiers. Optionally, transmitted signal power is detected to identify transmit and receiving intervals.
    Type: Application
    Filed: August 5, 2009
    Publication date: February 10, 2011
    Applicant: Radio Frequency Systems, Inc.
    Inventors: Paul Carney, Jing Wang
  • Publication number: 20110032855
    Abstract: The present invention provides a method of performing communication using a TDD (Time Division Duplex) mode, the method comprising receiving, from a second system, TDD frame configuration information of the second system, which comprises information on punctured symbol, the information on punctured symbol to be obtained based on TDD frame configuration information of a first system and operating based on the received TDD frame configuration information of the second system.
    Type: Application
    Filed: April 23, 2009
    Publication date: February 10, 2011
    Inventors: Dong Cheol Kim, Min Seok Noh, Yeong Hyeon Kwon, Jin Sam Kwak, Sung Ho Moon, Seung Hee Han, Hyun Woo Lee
  • Publication number: 20110032850
    Abstract: A station is disclosed that is configured for signal transmission in an Orthogonal Frequency Division Multiple Access (OFDMA) system. The station includes a processor configured to fix a subcarrier spacing to a predetermined value for one or more subframes in all available bandwidths. The station further includes a transmitter configured to transmit a signal having the fixed subcarrier spacing, regardless of a frame structure of the one or more subframes. According to certain embodiments, the predetermined value may be divided evenly by at least one channel raster. The predetermined value may be 12.5 KHz, according to certain embodiments. Alternatively, the predetermined value is 6.25 KHz for one or more low mobility mobile stations, and/or the predetermined value is 25 KHz for one or more high mobility mobile stations. The station may be a mobile station or a base station configured for uplink and downlink transmission.
    Type: Application
    Filed: May 28, 2010
    Publication date: February 10, 2011
    Inventor: Sean CAI
  • Publication number: 20110026444
    Abstract: A method for feeding back confirmation information on a physical uplink shared channel, this method includes: an eNodeB carries, in downlink control information, a number value of the downlink sub-frame corresponding to the confirmation information which is fed back by one uplink sub-frame, and transmits data on a plurality of continuous downlink sub-frames after the sub-frame carrying the downlink control information (S202), wherein the number of the downlink sub-frames which transmit the data is equal to an number of the downlink sub-frames corresponding to the confirmation information fed back by the one uplink sub-frame; after the user equipment receives the downlink sub-frame which carries the downlink control information, the data is received from the downlink sub-frame which transmits the data after this downlink sub-frame, and the confirmation information received is fed back to the eNodeB through a physical uplink shared channel through an uplink sub-frame (S204).
    Type: Application
    Filed: October 15, 2010
    Publication date: February 3, 2011
    Inventors: Bo Dai, Guanghui Yu, Shuqiang Xia, Peng Hao, Chunli Liang
  • Publication number: 20110026445
    Abstract: The present invention discloses a method for configuring and indicating physical random access channel parameter in a time division duplex system, suitable for the long term evolution, system, including: the same PRACH configuration set is stored in a base station and a terminal respectively; when performing a PRACH configuration, the terminal inquires the PRACH configuration set according to configuration information to obtain a configuration parameter, and/or the terminal computes to obtain the configuration parameter according to a system parameter. Set by using the method provided by the present invention, the PRACH configuration set can provide enough density types for various PRACH formats in order to meet the requirements of different system loads, and meanwhile can provide enough version types for each combination of format and density, decrease the processing load of the base station, and reduce the inter-cell interference.
    Type: Application
    Filed: January 21, 2009
    Publication date: February 3, 2011
    Applicant: ZTE CORPORATION
    Inventors: Peng Hao, Shuqiang Xia, Chunli Liang, Bo Dai, Bin Yu
  • Patent number: 7876716
    Abstract: A base station (10) performs bi-directional radio communications with terminal station apparatuses using communication frames each having time slots and being composed of a first region with a predetermined open-loop period and a second region with an open-loop period shorter than the open-loop period of the first region. A level detecting section (21) detects a received level of an uplink slot configured in the second region. A transmission diversity section (14) performs diversity transmission on a downlink transmission signal assigned to a downlink slot corresponding to the uplink slot, corresponding to a result of detection of the received level. It is thereby possible to enhance the effect of improving the received quality due to transmission diversity without degrading the transmission efficiency.
    Type: Grant
    Filed: April 16, 2002
    Date of Patent: January 25, 2011
    Assignee: Panasonic Corporation
    Inventor: Hiroaki Sudo
  • Patent number: 7876360
    Abstract: An image data processor converts an image signal into an image data. The multi-codec unit converts the image data into a transfer data. A communication unit receives a transfer request from an outside terminal device and transmits the transfer data to the outside terminal device. A time-sharing control unit controls to drive the image data processor and the multi-codec unit in a time-sharing manner in accordance with the transfer request. A transfer data selecting unit for selecting the transfer data corresponding to the transfer request from a group of the transfer data generated by the image data processing unit and the multi-codec unit which are controlled to drive in the time-sharing manner by the time-sharing management unit, and transmitting the selected transfer data to the communication unit.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: January 25, 2011
    Assignee: Panasonic Corporation
    Inventors: Kenji Arakawa, Toshinobu Hatano, Taichi Nagata, Kentaro Takakura
  • Publication number: 20110013545
    Abstract: A Time Division Duplex (TDD) communication apparatus and an operation method thereof can provide operation clock signals in the transmission and reception of the TDD communication apparatus using a Clock Recovery & Data Retiming (CDR) circuit, thereby stabilizing an operation without any crystal oscillator and reducing the power consumption. In a transmission time interval, a transmitting frame is processed using a clock signal of a reference frequency generated from the CDR circuit. In a reception time interval, a receiving frame is processed using a clock signal recovered from the receiving frame by the CDR circuit.
    Type: Application
    Filed: April 11, 2008
    Publication date: January 20, 2011
    Applicant: Electronics and Telecommunications Research Instiute
    Inventors: Jin Kyung Kim, Sung Weon Kang, Tae Wook Kang, Kyung Soo Kim, Sung Eun Kim, Jung Bum Kim, Duck Gun Park, Hyung II Park, In Gi Lim, Chang Hee Hyoung, Jung Hwan Hwang, Ki Hyuk Park, Jae Hoon Shim
  • Publication number: 20110013546
    Abstract: A method for sending a sounding reference signal (SRS) of uplink channel in a time division duplex system is provided, a terminal calculates the parameters of the resource for sending an SRS in an uplink pilot time slot (UpPTS) according to the configuration information related to the sounding reference signal (SRS) of the uplink channel, the parameters include the frequency domain start position of the resource, and then the SRS is sent over the resource; wherein when the frequency domain start position of the resource is calculated, it is necessary to determine the index of the first sub-carrier in the maximum SRS bandwidth; the terminal determines the index according to the frequency domain position of one PRACH or that of more PRACHs in the uplink pilot time slots, when the PRACH includes the sub-carrier at the lower boundary of the system bandwidth, the upper boundary of the system bandwidth is used as the end position of the maximum SRS bandwidth and the start position of the maximum SRS bandwidth is ca
    Type: Application
    Filed: June 2, 2009
    Publication date: January 20, 2011
    Inventors: Peng Hao, Chunli Liang, Bo Dai, Shuqiang Xia, Bin Yu
  • Patent number: 7855983
    Abstract: An RF module adapted for direct surface mounting to the top surface of the front end of the motherboard of a wireless base station such as, for example, a femtocell. The module comprises a printed circuit board having a plurality of direct surface mounted electrical components defining respective signal transmit and receive sections for RF signals. The signal transmit section is defined by at least a power amplifier, a coupler, and a lowpass filter. The signal receive section is defined by at least a receive bandpass filter and a low-noise amplifier. A lid covers selected ones of the electrical components except for at least the power amplifier. An RF switch is located between and interconnects the respective transmit and receive sections to an antenna pin.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: December 21, 2010
    Assignee: CTS Corporation
    Inventors: Thomas A. Knecht, Glen Reeser
  • Patent number: 7855997
    Abstract: Method and apparatus for scheduling time division multiple access (TDMA) communications among a plurality of peer nodes arranged to form a wireless ad hoc mobile network. The peer nodes communicate with each other using directional antennas and a TDMA process. The method includes a scheduling process for scheduling at least one transmit time slot during which a first one of the plurality of peer nodes transmits wireless data to a second one of the plurality of peer nodes.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: December 21, 2010
    Assignee: Harris Corporation
    Inventors: Stanley L. Adams, Keith A. Olds, Joseph B. Cain, Michael R. James
  • Publication number: 20100315978
    Abstract: In various embodiments, a system and method for improving a noise figure (NF) of a time division duplex (TDD) communications system includes a pre-amplified antenna unit having a plurality of antennas and associated low-noise amplifiers (LNA). Each of the associated LNA's is arranged to receive signals from a phase-matched pair of antennas selected from the plurality of antennas. For each of the phase-matched antenna pairs, a variable negative gain circuit may be coupled to a TDD signal output of the associated LNA such that a remote radio head (RRH) may be suitably coupled to an output of the variable gain circuit. The variable gain circuit is configured to provide a negative gain to the TDD signal appropriate to ensure that a dynamic range of the RRH is not reduced from a desired dynamic range due to excess gain provided by the LNA.
    Type: Application
    Filed: June 10, 2009
    Publication date: December 16, 2010
    Applicant: CLEAR WIRELESS, LLC
    Inventors: Durga P. Satapathy, Walter Rausch
  • Publication number: 20100309827
    Abstract: Provided is a time division duplex (TDD) transceiver. A receiver chain processing received signals and a transmitter chain processing signals to be transmitted share an electronic component used in a circuit, such as an amplifier, a mixer, a filter, etc., so that the size of a semiconductor die needed to manufacture a radio frequency (RF) chip can be reduced.
    Type: Application
    Filed: August 20, 2010
    Publication date: December 9, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Pil-Soon CHOI
  • Patent number: 7848314
    Abstract: Providing VOIP barge-in support for a half-duplex DSR client on a full-duplex network by buffering, in a half-duplex DSR client, input audio from the full-duplex network; playing, through the half-duplex DSR client, the buffered input audio; pausing, during voice activity on the half-duplex DSR client, the playing of the buffered input audio; sending, during voice activity on the half-duplex DSR client, speech for recognition through the full-duplex network to a voice server; receiving in the half-duplex DSR client through the full-duplex network from the voice server notification of speech recognition, the notification bearing a time stamp; and, responsive to receiving the notification, resuming the playing of the buffered input audio, including playing only buffered VOIP audio data bearing time stamps later than the time stamp of the recognition notification.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: December 7, 2010
    Assignee: Nuance Communications, Inc.
    Inventors: Charles W. Cross, Jr., Yan Li, Gerald M. McCobb
  • Publication number: 20100290372
    Abstract: The method for multiple TDD systems coexistence comprising steps of: a newly deployed system calculating a relative time offset ?t for a corresponding frame; the newly deployed system transmitting uplink and downlink signals based on a time reference information obtained by a summation of the relative time offset ?t and a time reference of an existing system. With the method proposed in present invention, uplink and downlink interference from adjacent frequency bands and from adjacent carriers in the same frequency band can be greatly reduced and a transmission time utility can be guaranteed for a newly deployed system.
    Type: Application
    Filed: January 9, 2009
    Publication date: November 18, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chuan Zhong, Hong He, Xufeng Zheng, Zongchuang Liang, Ho-Kyu Choi, Jae-Weon Cho, Jung-Je Son
  • Publication number: 20100290376
    Abstract: A method for sending physical downlink control channel (PDCCH) signals in downlink pilot time slots (DwPTS) comprises: a base station (BS) transmits the PDCCH signals on one or more symbols in the DwPTS, and resources used for transmitting the PDCCH signals are different from resources used for transmitting primary synchronization signals of synchronization signals. In the present invention, the method for sending the PDCCH signals can solve the problem of conflict between the PDCCH and the primary synchronization signals in the DwPTS by generating a less delay and less impact on other channels.
    Type: Application
    Filed: December 4, 2008
    Publication date: November 18, 2010
    Applicant: ZTE CORPORATION
    Inventors: Bo Dai, Shuqiang Xia, Peng Hao, Chunli Liang
  • Publication number: 20100284313
    Abstract: A frame switching device for an AFDX network, the device including a first port, configured to be connected to a frame switch of the network or else to a terminal, for example a computer, and a plurality of second ports configured to be respectively connected to on-board pieces of equipment. Each frame incident on the first port is replicated on each of the second ports. The second ports are periodically polled in turn, each frame present on a second polled port being transferred onto the first port.
    Type: Application
    Filed: September 3, 2008
    Publication date: November 11, 2010
    Applicant: AIRBUS OPERATIONS (inc. as a Soc. par Act. Simpl.)
    Inventor: Stephane Monnier
  • Patent number: 7831213
    Abstract: Controlling a tower-top low noise amplifier (TTLNA) without transmit mode or receive mode timing control signals from a base station. The TTLNA system and associated components autonomously determine the proper mode of operation (transmit/receive), and automatically control the operation of a low noise amplifier (LNA) to prevent signal distortion and/or damage to the wireless system hardware. A preferred method comprises: at a TTLNA, measuring a transmit time period based on detecting radio frequency (RF) transmit signal energy; determining a receive time duration based on the measured time period and a predetermined frame time; and, configuring the TTLNA to a receive mode by placing a low noise amplifier into a receive signal path during the determined receive time duration.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: November 9, 2010
    Assignee: Clear Wireless LLC
    Inventors: Walter F. Rausch, William Bloomingdale, David A. Maples
  • Publication number: 20100278083
    Abstract: Disclosed in a method for establishing a time domain structure of a frame in a heterogeneous TDD systems environment. In other words, in a situation of coexisting heterogeneous systems comprising a first system corresponding to an existing TDD system and a second system corresponding to a new system, a method is provided for establishing a time domain structure of a second frame for the second TDD system mode to enable it to coexist with a first frame for the first TDD (Time Division Duplex) system mode, that comprises obtaining information for the first supported system type and a first ratio between the downlink region and the uplink region of the first frame structure, and then, according to the obtained information, establishing a second ratio between the downlink region and the uplink region of the second frame structure for the second system. Further, particular numerology is provided for said method.
    Type: Application
    Filed: January 23, 2009
    Publication date: November 4, 2010
    Inventors: Jin Sam Kwak, Min Seok Noh, Dong Cheol Kim, Sung Ho Moon, Seung Hee Han, Hyun Woo Lee, Yeong Hyeon Kwon
  • Patent number: 7826541
    Abstract: A wireless relay system for relaying a radio signal transmitted from a first wireless station to a second wireless station via a wireless relay apparatus is disclosed. The wireless relay system includes a relay control part for receiving transmission symbols transmitted from the first wireless station and refraining from relaying a portion of the symbols, a pilot signal transmission part for transmitting a pilot signal that is inserted into a section of the portion of the transmission symbols, a coupling loop interference wave estimation part for receiving the pilot signal and estimating a coupling loop interference wave based on the pilot signal, and a coupling loop interference wave cancellation part for subtracting the estimated coupling loop interference wave from a reception signal.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: November 2, 2010
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiromasa Fujii, Hirohito Suda, Tetsu Tanaka
  • Publication number: 20100265857
    Abstract: The present invention discloses a method for transmitting multimedia broadcast multicast services, comprising the following steps: a Time Division Duplex system divides a time slot for bearing multimedia broadcast multicast services into code channels; each multimedia broadcast multicast service to be transmitted is borne on a corresponding divided code channel, and is transmitted to a user equipment based on the single frequency network mode of the multimedia broadcast multicast service. The present invention also discloses a method for receiving multimedia broadcast multicast services, and apparatus for transmitting and receiving multimedia broadcast multicast services, such that time slot resources for bearing multimedia broadcast multicast services are utilized more sufficiently.
    Type: Application
    Filed: July 18, 2008
    Publication date: October 21, 2010
    Inventors: Xuelong Wang, Ding Yu
  • Publication number: 20100265855
    Abstract: A method, an apparatus, and a system for forming Time Division Duplex (TDD) Multi-Input Multi-Output (MIMO) downlink beams are disclosed herein. The method includes: generating a transmitting beam of a first data stream according to a Maximum Rate Transmission (MRT) criterion; and generating transmitting beams of other data streams except the first data stream, wherein the transmitting beams of other data streams are confined in a null space of the transmitting beam of the first data stream. Through the embodiments of the present invention, the Base Station obtains precise Partial Channel State Information by using only reciprocity without requiring feedback information, and thus the calculation is simplified and the rate of data streams is improved.
    Type: Application
    Filed: June 28, 2010
    Publication date: October 21, 2010
    Inventors: Luxi Yang, Daofeng Xu, Yinggang Du
  • Patent number: 7808934
    Abstract: In a wireless mesh network a method includes, at a first node, receiving a transmission from a second node during a first sub-frame of a frame with a first transceiver operating with a first center frequency; processing the received transmission; and transmitting, after a predetermined fixed interval, with a second transceiver operating with a second center frequency the processed received transmission to a third node during a second sub-frame of a subsequent frame or of the same frame. Also disclosed are computer programs to execute the method, as well as apparatus constructed to implement the method.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: October 5, 2010
    Assignee: Nokia Siemens Networks Oy
    Inventors: Zhu Yan Zhao, Hao Guan
  • Publication number: 20100246457
    Abstract: A pre-coding/decoding method and apparatus for data transmission between a transmitting end and a receiving end is provided. The pre-coding method for data transmission through Time Division Duplexing (TDD) in a mobile communication system includes estimating downlink channel state information based on an uplink sounding signal, and pre-coding a data symbol and a reference signal based on the estimated downlink channel state information.
    Type: Application
    Filed: March 30, 2010
    Publication date: September 30, 2010
    Applicants: SAMSUNG ELECTRONICS CO. LTD., BEIJING SAMSUNG TELECOM R&D CENTER
    Inventors: Lei ZHOU, Xufeng ZHENG, Zheng ZHAO
  • Publication number: 20100245119
    Abstract: A two-tier communication system for a seismic streamer. The communication system operates over an unshielded twisted-pair communication line extending the length of the streamer. Repeater units having a repeater function and a device controller function divide the twisted pair into line segments. Coils on each segment couple signals inductively to collocated external devices in a low-speed 2400 baud FSK data link between the devices and an associated device controller. A Gaussian 8-level FSK high-speed 60 kbit/s data link is established along all the segments with the repeaters re-transmitting boosted signals along the entire length of the communication line. The coils are transparent at the high-speed data rate. Time division multiple access (TDMA) or frequency division multiple access (FDMA) is used to accommodate the two links on the single twisted pair.
    Type: Application
    Filed: March 25, 2009
    Publication date: September 30, 2010
    Applicant: ION GEOPHYSICAL CORPORATION
    Inventors: Robert E. Rouquette, Robert H. Kemp, JR., Dale J. Lambert, Clem B. Guillot, III, Daniel B. Seale
  • Publication number: 20100226295
    Abstract: A method for physical layer random access in wideband TDD mobile communication system is disclosed, and the method comprises: receiving the system broadcast message of the cell, obtaining the configuration information of the frequency band in frequency domain in the UpPTS time slot of the cell; and the terminal sends random access sequences to the BS in the UpPTS time slot according to the configuration information of the frequency band in the UpPTS time slot. The configuration information of the frequency band in frequency domain in the UpPTS time slot comprises the information about the frequency band number that the total bandwidth used is divided in the UpPTS time slot, the information about the bandwidth size of each frequency band, and the information about the position of the frequency point.
    Type: Application
    Filed: January 4, 2007
    Publication date: September 9, 2010
    Applicant: SHANGHAI ULTIMATE POWER COMMUNICATIONS TECHNOLOGY CO., LTD.
    Inventors: Shaohui Sun, Yingmin Wang, Libo Wang, Hai Bi
  • Publication number: 20100226296
    Abstract: A method of scheduling time division duplex frames at a base station in a time division duplex system is provided. The method includes determining if the round-trip propagation delay between the base station and a communicatively coupled subscriber station is greater than the difference between the base station turn-around time and the minimum allowed subscriber station turn-around time, and modifying time slots in a time division duplex frame being sent to the subscriber station over a communication link to extend the range of signals sent from the base station.
    Type: Application
    Filed: March 3, 2009
    Publication date: September 9, 2010
    Applicant: ADC TELECOMMUNICATIONS, INC.
    Inventors: Philip M. Wala, Harold A. Roberts
  • Patent number: 7778208
    Abstract: Disclosed is a wireless communication system applicable to a time-division duplex transceiver system. The time-division duplex mobile communication system can achieve miniaturization, low power consumption and low costs by using a frequency conversion circuit including a mixer and an intermediate frequency (IF) circuit for both transmitter and receiver, and also can cope with multi-band, multi-application systems by using a broadband amplifier, a variable IF filter and a variable gain amplifier.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: August 17, 2010
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Moon Suk Jeong, Nam Heung Kim, Jeong Hoon Kim, Eung Ju Kim
  • Publication number: 20100177670
    Abstract: The disclosure relates to resource allocation. In accordance with the disclosed method first information regarding a first direction of a duplex communication link and second information regarding a second direction of the duplex communication link is provided for a node. The first information and the second information are processed, and channel resources are allocated for the first direction and the second direction of the duplex communication link based at least partially on said processing.
    Type: Application
    Filed: January 13, 2010
    Publication date: July 15, 2010
    Applicant: NOKIA CORPORATION
    Inventor: Ari Tapani Hottinen
  • Patent number: 7746811
    Abstract: A time shared bi-directional serial signaling system providing a differential signal with apparent duplex signal operation for higher and lower bandwidth data signals in a forward direction and another lower bandwidth data signal in a return direction.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: June 29, 2010
    Assignee: National Semiconductor Corporation
    Inventors: Xin Liu, Qingping Zheng, John Goldie
  • Patent number: 7729255
    Abstract: When digital signals are to be transmitted between a camera unit and a camera control unit, the distance of their transmission depends on the frequency at which the digital signals are transmitted. The higher the frequency of the digital signals is, the greater the cable attenuation is, inviting deterioration of the signals.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: June 1, 2010
    Assignee: Hitachi Kokusai Electric Inc.
    Inventor: Kazuhiro Tanabe
  • Publication number: 20100097965
    Abstract: A femtocell base station apparatus may sense a wireless propagation environment around the femtocell base station apparatus to obtain wireless propagation environment information, transmit first control information including the wireless propagation environment information to at least one master base station adjacent to the femtocell base station apparatus, receive second control information from the at least one master base station, and control data communication performed between the femtocell base station apparatus and a mobile terminal based on the second control information.
    Type: Application
    Filed: June 12, 2009
    Publication date: April 22, 2010
    Inventors: Tae Soo KWON, Kyung Hun JANG
  • Patent number: 7693116
    Abstract: A processing unit performs adaptive array signal processing. A modem unit performs modulation and demodulation processing. A derivation unit derives signal strength as radio communication qualities among a plurality of terminal apparatuses of half rate format. A control unit assigns time slots in a plurality of terminal apparatuses of half rate format to be communicated with a base station apparatus. The control unit selects two terminal apparatuses whose difference between signal strengths is smaller, from among the plurality of terminal apparatuses of half rate, and then assigns time slots, having predetermined relationships, in these selected terminal apparatuses.
    Type: Grant
    Filed: December 9, 2005
    Date of Patent: April 6, 2010
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Makoto Nagai
  • Patent number: 7688765
    Abstract: A Time Division Duplex (TDD) wireless communication system includes a switch connected to an output port of a transmitter, a first transmission line for transmitting a transmission signal and for isolating a transmission path according to a mode, a first transmission line stub connected between the isolator and the first transmission line for reflecting a transmission signal transmitted from the isolator, a second transmission line connected between an output port of the first transmission line and an input port of a receiver for isolating a reception path in the transmission mode and for providing a reception signal received from the antenna feed line to the receiver, and a second transmission line stub connected in a stub form between the second transmission line and the input port of the receiver, for controlling the second transmission line to isolate the reception path.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: March 30, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Seong-Hun Kim
  • Patent number: 7688845
    Abstract: A method and arrangement in a telecommunications system comprising a data transmission path (8), the arrangement comprising devices (1, 21, 221 to 22n) and data being transmitted on the data transmission path between the devices in messages (4, 9) cyclically, whereby one or more of the devices (1, 221 to 22n) are arranged, during one or more first turns, respectively, to set the timing of their own cyclic traffic between cyclic traffic detected on the data transmission path; and one or more of the devices (1, 21, 221 to 22n) are arranged, during a second turn, to transmit a message not belonging to the cyclic traffic to the data transmission path on the basis of at least one determined occurrence time slot of the cyclic traffic such that the message does not collide with messages of the cyclic traffic which occur in the determined at least one occurrence time slot.
    Type: Grant
    Filed: April 4, 2005
    Date of Patent: March 30, 2010
    Assignee: ABB Oy
    Inventor: Kaj Salo
  • Publication number: 20100067412
    Abstract: Systems and methodologies are described that facilitate effectuating a random access procedure in a wireless communication environment. A random access preamble can be sent from an access terminal to a base station, and a random access response can be sent from the base station to the access terminal in response. The random access response can allocate resources to be utilized by the access terminal for a scheduled transmission (e.g., message 3, . . . ). Further, a plurality of Transmission Time Intervals (TTIs) can be bundled for the scheduled transmission. Moreover, a payload of the scheduled transmission can be transmitted to the base station from the access terminal within a common Transport Block (TB) using the bundled plurality of TTIs. According to an example, employment of TTI bundling can be controlled on a per network basis, per base station basis, or per access terminal basis.
    Type: Application
    Filed: August 17, 2009
    Publication date: March 18, 2010
    Applicant: QUALCOMM INCORPORATED
    Inventors: Masato Kitazoe, Arnaud Meylan