Patents by Inventor Yujian Zhang

Yujian Zhang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8413001
    Abstract: A communication apparatus (CA) such as a mobile node/station (MN), a base station (BS), or a radio station (RS) may support determination of HARQ timing. The CA may generate at least in part one or more generalized frames such as a frequency division duplex (FDD) frame or a time division duplex (TDD) frame. The generalized FDD and TDD frames may include support to determine the HARQ timing considering various factors, which may affect the HARQ timing. The FDD and TDD frames may include information corresponding to various factors to determine the HARQ timing considering factors such as DL/UL ratio, number of sub-frames per frame, variable transmission time interval (TTI), relay zones, legacy IEEEĀ® 802.16e zones, and availability of ACKCH.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: April 2, 2013
    Assignee: Intel Corporation
    Inventors: Jing Zhu, Yujian Zhang, Hujun Yin
  • Patent number: 8391910
    Abstract: A method for configuring gain factors in a WCDMA telecommunication system is provided in which the gain factor for defining power required for normal reception of uplink data in an environment supporting an uplink service over an E-DCH can be configured using minimal signaling information. First gain factors for first TFs corresponding to a part of a TF set including a plurality of TFs available for an uplink service are received. One of the first TFs is determined as a reference TF for a second TF other than the first TFs in the TF set. Then, a second gain factor for the second TF is calculated using the first gain factor for the determined reference TF. The second gain factor is used for transmitting or receiving uplink data.
    Type: Grant
    Filed: September 9, 2009
    Date of Patent: March 5, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Youn-Hyoung Heo, Ju-Ho Lee, Yujian Zhang, Joon-Young Cho, Young-Bum Kim, Yong-Jun Kwak
  • Patent number: 8316269
    Abstract: An enhanced semi-explicit solution for HARQ feedback channel indexing in wireless communication systems is disclosed. The HARQ feedback channel indexing method may be applied to the HARQ feedback channel transmitted in the downlink, as well as the HARQ feedback channel transmitted in the uplink.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: November 20, 2012
    Assignee: Intel Corporation
    Inventors: Yujian Zhang, Hujun Yin, Yi Hsuan
  • Patent number: 8301950
    Abstract: A variable sub-carrier mapping method comprising steps of: applying different bit interleaving schemes to different transmissions of a hybrid automatic retransmission request (HARQ) process in side of transmitter; and in the side of the transmitter, modulating symbols onto sub-carriers for transmitting. Different transmissions in one HARQ process adopt different bit interleavers or different symbol-to-sub-carrier mapping methods so as to realize that the same bit of different transmissions in one HARQ process is transmitted via different sub-carriers. Therefore, the system achieves the frequency diversity gain and reduces the probability of failure of HARQ transmission caused by that some bits are always transmitted via the sub-carrier with the same deep fading. In this way, the average HARQ retransmission times can be reduced and the system throughput can be improved.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: October 30, 2012
    Assignees: Samsung Electronics Co., Ltd, Beijing Samsung Telecom R&D Center
    Inventors: Bing Bu, Xiaogiang Li, Yujian Zhang, Ju-Ho Lee
  • Publication number: 20120269160
    Abstract: Methods and apparatus are provided for transmitting control information in an SC-FDMA system. A UE generates a random cyclic shift value based on an SC-FDMA symbol index and a slot index. The UE cyclically shifts a sequence by the random cyclic shift value. The UE multiplies a control channel signal, including the control information, by the cyclically shifted sequence on an SC-FDMA symbol basis. The UE transmits the multiplied control channel signal in an SC-FDMA symbol to a Node B.
    Type: Application
    Filed: July 6, 2012
    Publication date: October 25, 2012
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Young-Bum Kim, Joon-Young Cho, Ju-Ho Lee, Ying Yang Li, Yujian Zhang
  • Publication number: 20120257575
    Abstract: Briefly, in accordance with one or more embodiments, mobile station or user equipment receives pilot signals from two or more infrastructure nodes in a distributed antenna system, and calculates phase or timing information, or combinations thereof, from the pilot signals. The mobile station feeds back the phase or timing information, or combinations thereof, to the infrastructure nodes, and then receives one or more subsequent transmissions from the infrastructure nodes with phase shift or timing adjustments, or combinations thereof, calculated by the infrastructure nodes and applied to the spatial streams transmitted by the infrastructure nodes.
    Type: Application
    Filed: June 15, 2012
    Publication date: October 11, 2012
    Inventors: Alexei Davydov, Alexander Maltsev, Gregory V. Morozov, Vadim Sergeyev, Yuan Zhu, Kamran Etemad, Xiangying Yang, Yujian Zhang
  • Patent number: 8243835
    Abstract: Disclosed are a method and apparatus for measurement report for the decision of transmission mode transition that obtain a threshold value of reporting CQI_difference of all frequency sub-bands; measure a CQI value at each CQI reporting frequency sub-band of whole frequency band in each measure time interval; determine a CQI_difference value based on the measured CQI value of each CQI reporting frequency sub-band; and compare the determined CQI_difference value with the threshold value, if a condition is satisfied, then the UE sends the determined CQI_difference value to the BS. After the UE has reported this measurement report to the BS, the BS may choose a more suitable data transmission mode for the UE based on this measurement report to make data transmission more effective.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: August 14, 2012
    Assignees: Samsung Electronics Co., Ltd, Beijing Samsung Telecom R & D Center
    Inventors: Chengjun Sun, Yujian Zhang, Chunying Sun, Xiaoquiang Li, Ju-Ho Lee
  • Patent number: 8239723
    Abstract: An apparatus and method for HARQ timing control in wireless communication systems is disclosed. The apparatus and method provides one unified algorithm to determine HARQ timing, with consideration of the downlink-to-uplink ratio, the presence of legacy zones, support of relay zones, and variable transmission time interval length. The disclosed algorithm guarantees sufficient processing time, at both the transmit and receive sides. Further, retransmissions occur in a periodic manner, simplifying the implementation.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: August 7, 2012
    Assignee: Intel Corporation
    Inventors: Yujian Zhang, Hujun Yin
  • Patent number: 8238320
    Abstract: A method and apparatus for transmitting and receiving control information in an SC-FDMA system are provided, in which different cyclic shift values are generated for different SC-FDMA symbols in one of a slot and a subframe, a sequence allocated for CDM of control information is cyclically shifted by the cyclic shift values, and a control channel signal including the control information is combined with the cyclically shifted sequences on an SC-FDMA symbol basis and transmitted in the SC-FDMA symbols.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: August 7, 2012
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Young-Bum Kim, Joon-Young Cho, Ju-Ho Lee, Ying Yang Li, Yujian Zhang
  • Publication number: 20120163291
    Abstract: In some embodiments, a wireless device comprises a baseband processor, a control module coupled to the signal processor and comprising logic to map a first set and at least one redundant set of physical uplink control channel (PUCCH) blocks into a subframe structure, wherein the at least one redundant set of PUCCH blocks is embedded in an interior section of the subframe, an RF modulator/demodulator coupled to the baseband processor to modulate/demodulate the PUCCH blocks for communication within a predetermined frequency range, and a transmitter to transmit the PUCCH blocks. Other embodiments may be described.
    Type: Application
    Filed: December 23, 2010
    Publication date: June 28, 2012
    Inventors: Yuan Zhu, Xiangying Yang, Qinghua Li, Yujian Zhang
  • Patent number: 8208855
    Abstract: Provided is a method for transitioning between a distributed transmission mode and a localized transmission mode, including transmitting, by a Base Station (BS), a measurement control message to a User Element (UE), wherein the UE makes corresponding measurement and transmits a required measurement report message to the BS and the BS transmits a transition indicator message of new mode to the UE based on measurement report message sent from the UE; and commencing CQI reporting and a downlink transmission of a new mode between the UE and the BS. The BS can choose a more appropriate transmission mode for the downlink transmission based on changing characteristics of the channel in the time domain and the frequency domain.
    Type: Grant
    Filed: January 8, 2007
    Date of Patent: June 26, 2012
    Assignees: Samsung Electronics Co., Ltd, Beijing Samsung Telecom R&D Center
    Inventors: Ju-Ho Lee, Xiaoqiang Li, Chengjun Sun, Chunying Sun, Yujian Zhang
  • Patent number: 8200252
    Abstract: The method for an eNodeB transmitting control channels with pre-allocated resources comprising steps of the eNodeB determining whether to transmit the control channels according to its needs; the eNodeB transmitting the control channels with pre-allocated resources according to properties of the signaling to be transmitted. With the method proposed in present invention, operations in a receiving end are simplified so that the time spent in receiving signaling is shortened and power consumption is well reduced.
    Type: Grant
    Filed: February 12, 2008
    Date of Patent: June 12, 2012
    Assignees: Samsung Electronics Co., Ltd., Beijing Samsung Telecom R&D Center
    Inventors: Ju-Ho Lee, Xiaogiang Li, Yingyang Li, Yujian Zhang
  • Patent number: 8179780
    Abstract: A method and apparatus for transmitting and receiving control information in an SC-FDMA system are provided. Different orthogonal codes are generated for different slots each including a plurality of SC-FDMA symbols in a subframe. A control channel signal is generated by multiplying control symbols carrying control information by a sequence allocated for CDM of the control information. The control channel signal is multiplied by chips of the orthogonal codes on an SC-FDMA symbol basis and transmitted in the SC-FDMA symbols.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: May 15, 2012
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Young-Bum Kim, Joon-Young Cho, Ju-Ho Lee, Ying Yang Li, Yujian Zhang
  • Publication number: 20120082077
    Abstract: Embodiments of systems and methods for time domain multiplexing solutions for in-device coexistence are generally described herein. Other embodiments may be described and claimed.
    Type: Application
    Filed: March 31, 2011
    Publication date: April 5, 2012
    Inventors: Yujian Zhang, Xiangying Yang, Jing Zhu, Xue Yang, Emily Qi, Carlos Cordeiro
  • Publication number: 20120082082
    Abstract: Briefly, in accordance with one or more embodiments, two or more cells are configured to perform coordinated multipoint (CoMP) transmission for one or more user equipment devices with a common media access control (MAC) or a common radio resource control (RRC). Measurement information is received from the one or more user equipment devices. One or more of the cells may be deactivated, or one or more additional cells may be activated for coordinated multipoint transmission based at least in part on the measurement information.
    Type: Application
    Filed: June 22, 2011
    Publication date: April 5, 2012
    Inventors: Kamran Etemad, Alexei Davydov, Xiangying Yang, Yuan Zhu, Yujian Zhang
  • Publication number: 20120039229
    Abstract: Briefly, in accordance with one or more embodiments, user equipment receives unicast services from a first carrier of a primary serving cell and determines if Multimedia Broadcast and Multicast services (MBMS) services are available on a second carrier based at least in part on information in a broadcast carrier channel that indicates the second carrier or an identification (ID) of the second carrier. If MBMS services are available on the second carrier, the user equipment at least temporarily switches to the second carrier to receive the MBMS services. The user equipment may provide feedback to the network or the primary serving cell when it starts and stops receiving MBMS services, and then may switch back to the primary serving cell when MBMS services have ended or the user equipment no longer desires to receive MBMS services.
    Type: Application
    Filed: June 7, 2011
    Publication date: February 16, 2012
    Inventors: Kamran Etemad, Yujian Zhang
  • Publication number: 20120038521
    Abstract: A method of determining reference signal received power (RSRP) by user equipment (UE) associated with a distributed antenna system (DAS) may include detecting at least three different reference signals in one or more common reference signals (CRSs) that are associated with different antennas in the DAS. The method may also include determining at least three different RSRPs corresponding to the at least three different reference signals. The at least three different RSRPs may be level 3 filtered to produce at least three corresponding filtered powers. The UE may report a maximum of the at least three corresponding filtered powers to the distributed antenna system.
    Type: Application
    Filed: December 17, 2010
    Publication date: February 16, 2012
    Inventors: Yuan Zhu, Sassan Ahmadi, Xiangying Yang, Yujian Zhang, Kamran Etemad, Xiaogang Chen
  • Publication number: 20110138244
    Abstract: A communication apparatus (CA) such as a mobile node/station (MN), a base station (BS), or a radio station (RS) may support determination of HARQ timing. The CA may generate at least in part one or more generalized frames such as a frequency division duplex (FDD) frame or a time division duplex (TDD) frame. The generalized FDD and TDD frames may include support to determine the HARQ timing considering various factors, which may affect the HARQ timing. The FDD and TDD frames may include information corresponding to various factors to determine the HARQ timing considering factors such as DL/UL ratio, number of sub-frames per frame, variable transmission time interval (TTI), relay zones, legacy IEEEĀ® 802.16e zones, and availability of ACKCH.
    Type: Application
    Filed: December 3, 2009
    Publication date: June 9, 2011
    Inventors: Jing Zhu, Yujian Zhang, Hujun Yin
  • Patent number: 7885202
    Abstract: A method for a UE reporting a CQI comprising steps of: obtaining a total number M of CQI report sub-bands in a system and a number N of CQI report sub-bands needed to be reported; measuring channel qualities of all sub-bands and according to the measurement result, determining N CQI report sub-bands needed to be reported and corresponding CQI values; sending a L-bit long sequence to a base station for indicating the sub-bands that need to be reported; sending CQI values corresponding to the sub-bands need to be reported to the base station. The present invention uses comparatively shorter bit sequence to indicate CQI report sub-bands needed to be reported and reduces the number of information bits necessary for CQI report sub-bands and also reduces the number of information bits corresponding to the CQI values in the CQI report sub-bands.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: February 8, 2011
    Assignees: Samsung Electronics Co., Ltd., Beijing Samsung Telecom R&D Center
    Inventors: Xiaoqiang Li, Chengjun Sun, Yujian Zhang, Ju-Ho Lee
  • Publication number: 20110029833
    Abstract: An apparatus and method for HARQ timing control in wireless communication systems is disclosed. The apparatus and method provides one unified algorithm to determine HARQ timing, with consideration of the downlink-to-uplink ratio, the presence of legacy zones, support of relay zones, and variable transmission time interval length. The disclosed algorithm guarantees sufficient processing time, at both the transmit and receive sides. Further, retransmissions occur in a periodic manner, simplifying the implementation.
    Type: Application
    Filed: July 30, 2009
    Publication date: February 3, 2011
    Inventors: YUJIAN ZHANG, Hujun Yin