Patents by Inventor Guiliang Yang

Guiliang Yang 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).

  • Publication number: 20080317152
    Abstract: Three channel coding schemes for multi-carrier HSDPA packet data transmission are disclosed. The first scheme includes: dividing data into N groups (S210); performing CRC attachment, code block segmentation, channel coding and rate matching on each group of data respectively (S220); scrambling and interleaving the N groups of data unitedly, and then dividing the data into N groups again to perform QAM constellation rearrangement and then map to physical channels of respective carriers for transmission. The second scheme includes: dividing data to be sent into groups (S510); and sending each group of data via a physical channel of a carrier after coding it according to single-carrier HSDPA (S520). The third scheme includes: sending N carrier channels as a whole to a physical layer to perform processing from CRC attachment to QAM constellation rearrangement (S710); dividing the processed data into groups and mapping them to respective carrier channels for transmission (S720).
    Type: Application
    Filed: June 30, 2006
    Publication date: December 25, 2008
    Applicant: SHANGHAI ULTIMATE POWER COMMUNICATIONS TECHNOLOGY,
    Inventors: Shaohui Sun, Yingmin Wang, Guiliang Yang
  • Publication number: 20080310373
    Abstract: A distribution method of multi basic midamble includes following step A. determining the number of channelizing code of a cell or sector (s101); B. configuring more than one of basic midamble to the cell or sector (s102); C. generating midamble which is no less than said channelizing code using said more than one of basic midamble (s103); D. configuring said midamble to make each channelizing code correspond to different midamble respectively (s104). The invention can configure multi basic midamble code in a cell or sector to make midamble correspond to all of adoptable spread spectrum code one-to-one, can improve the accuracy of joint detection remarkably and efficiently, and can change the service speed more securely. Furthermore, acquiring channelizing impulse response and corresponding spread spectrum code using the exact corresponding of midamble and spread spectrum code can acquire user original signal exactly. The invention also includes a joint detection method.
    Type: Application
    Filed: April 28, 2006
    Publication date: December 18, 2008
    Applicant: SHANGHAI ULTIMATE POWER COMMUNICATIONS TECHNOLOGY CO., LTD.
    Inventors: Ke Wang, Guiliang Yang, Feng Li
  • Publication number: 20080310455
    Abstract: A multi-code-set channel estimation method in a time-slot CDMA system having steps of: A. performing uni-code-set channel estimations and obtaining channel estimation result; B. extracting a maximum interference tap from the channel estimation result; C. reproducing interference components suffered respectively by response signals corresponding respectively to the plurality of code-sets from the maximum interference tap; D. canceling the interference components, and obtaining a pure channel estimation result of a signal corresponding to each code-set; E. determining whether a predetermined number of iterations has been performed, if so, outputting the result of each uni-code-set channel estimation; otherwise, taking the pure channel estimation result of the signal corresponding to each code-set as the channel estimation result of the code-set to be processed in the next iteration, and returning to step B.
    Type: Application
    Filed: June 2, 2006
    Publication date: December 18, 2008
    Applicant: SHANGHAI ULTIMATE POWER COMMUNICATIONS TECHNOLOGY CO., LTD.
    Inventors: Feng Li, Yingmin Wang, Nan Zhong, Guiliang Yang
  • Publication number: 20080310372
    Abstract: The present invention discloses a method for estimating DOA of a terminal in multiple co-frequency cells, including the steps of: A. obtaining a channel estimation result of at least one terminal expecting a calculation of DOA in an expecting co-frequency cell; B. performing a Direction-of-Arrival estimation for the expecting terminal in the expecting cell based on the channel estimation result through a DOA estimating method with a wave beam scan, a DOA estimating method with a maximum power path, or a DOA estimating method with a primary eigenvector. With the channel estimations of the multiple cells in the invention, accurate channel estimation results of the respective cells may be provided, from which the channel estimation result of the expecting terminal is selected.
    Type: Application
    Filed: April 30, 2006
    Publication date: December 18, 2008
    Inventors: Feng Li, Guiliang Yang, Nan Zhong
  • Publication number: 20080299985
    Abstract: The present invention discloses a method of allocating downlink traffic channel resources for multi-carrier HSDPA, and the method includes: first of all, selecting a carrier with the optimum channel condition; determining whether the carrier meets the resource allocation demand of a downlink traffic channel, if yes, allocating resources that meet the downlink traffic channel on the carrier; otherwise, allocating the available resources of the carrier to the downlink traffic channel, and selecting a carrier with the optimum channel condition from the remaining carriers for resource allocation according to the remaining resource allocation demand of the downlink traffic channel. The present invention provides, according to the transmission characteristic of the existing HSDPA multi-carrier, a method for allocating downlink traffic channel resources, which method is applicable for packet data transmission of the multi-carrier HSDPA.
    Type: Application
    Filed: June 29, 2006
    Publication date: December 4, 2008
    Inventors: Guiliang Yang, Shaohui Sun, Yingmin Wang
  • Publication number: 20080287137
    Abstract: A method for distributing wireless resource in multicarrier time division duplexing mobile communication system, such as TD-CDMA system, to overcome the shortage of 3GPP single carrier cell channel distribution technology of covering more lager area in composing cellular system, which contains using an area of covering same or almost same as a cell, selecting one carrier as main carrier and other carriers as auxiliary carrier, the frequency of main carrier is as different as possible, setting all public control channel in main carrier, the left resource of main carrier and resource of auxiliary carrier are used in uplink and downlink service channel, the arrangement of public channel in main carrier is same with that in single carrier cell.
    Type: Application
    Filed: September 12, 2005
    Publication date: November 20, 2008
    Applicant: DA TANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD.
    Inventors: Feng Li, Shihe Li, Yusong He, Guiliang Yang
  • Publication number: 20080259892
    Abstract: The present invention discloses a method for determining user channel impulse response in the TD-SCDMA system, including: setting one or more than one synchronous ID code and establishing corresponding relations between channel estimation parameters of each user and the synchronous ID code and a sub-frame number of a sub-frame transmitting the synchronous ID code; transmitting, by each user, a corresponding synchronous ID code in a sub-frame identified by a sub-frame number corresponding to channel estimation parameters according to the relations established in step A, wherein timing advance of transmitting the synchronous ID code is the same with that of transmitting uplink service data of the user; at Node B, continuing to detect whether there is the synchronous ID code in received signals, if there is one or more than one synchronous ID code, determining the channel estimation parameters of the user transmitting the synchronous ID code according to the detected synchronous ID code, sub-frame number of the
    Type: Application
    Filed: April 26, 2006
    Publication date: October 23, 2008
    Inventors: Feng Li, Guiliang Yang, Yuanxin Qiao, Tiezhu Xu
  • Publication number: 20080205347
    Abstract: The invention discloses a distribution method of channelization code in code division multiple access system, which including: A. the spread spectrum codes distributed to every sector and the correlated coefficients between the spread spectrum codes distributed to every neighbouring sector are calculated according to the cellular codes and the channelization codes distributed to every sector, when the network is programmed; B. every sector is divided into different regions and the edge region of every sector is formed; C. the priority of which every channelization code is at the edge region of every sector is decided according to the correlated coefficients between the spread spectrum codes distributed to every neighbouring sector; D. the position information of user is real-time calculated during the operation of system, and which region the user positioned in sector is determined according to the position information; E.
    Type: Application
    Filed: December 7, 2005
    Publication date: August 28, 2008
    Inventors: Changguo Sun, Yingmin Wang, Guiliang Yang
  • Publication number: 20080192660
    Abstract: A method to support dissymmetry service for multicarrier time division duplexing mobile communication system, which contains adopting different uplink and downlink time gap conversion point to support dissymmetry service among multicarrier frequency of different cells and same cell, when the original configured uplink and downlink time gap ratio can not support the service request, then changing the time gap ratio to receiving said request, adjusting service to avoid interference by quick dynamic channel distribution technology, in ending request service, changing time gap ratio in original ratio. Said invention supports different uplink and downlink time gap conversion point, the base station equipment needs establishing isolated uplink and downlink.
    Type: Application
    Filed: September 12, 2005
    Publication date: August 14, 2008
    Inventors: Shihe Li, Guiliang Yang, Jinling Hu
  • Publication number: 20080167030
    Abstract: Finding a channel impulse response estimation window in a current cell for at least one mobile terminal in a neighboring cell is disclosed. This can serve to mitigate interference caused by mobile terminals in neighboring cells in and among communications ongoing in a current cell. In one example, a method for A method for determining such a channel impulse response estimation window includes presetting, in the neighboring cell, at least two channel impulse response peak locations of respective mobile terminals in first and second predetermined periods with a predetermined peak location change pattern, and then upon receiving communication from a mobile terminal of the neighboring cell, analyzing channel impulse responses to identify the peak location change pattern with regard to first and second peak locations.
    Type: Application
    Filed: January 4, 2008
    Publication date: July 10, 2008
    Inventors: Feng Li, Jianxun Sun, Yingmin Wang, Guiliang Yang, Tiezhu Xu
  • Publication number: 20080102836
    Abstract: A method is disclosed for performing a handoff in a telecommunication system. The method comprises: performing a first multi-cell joint detection process for decoding the communications within the home cell when a mobile terminal enters a handoff region between a home cell and one or more neighboring cells; performing a handoff process when the mobile terminal is in the home cell to join a target neighboring cell; and performing a second multi-cell joint detection process for decoding the communications between the mobile terminal and the target neighboring cell. In this manner, decoding for uplink and/or downlink communications is improved, and throughout and performance of the telecommunication system is enhanced.
    Type: Application
    Filed: December 17, 2007
    Publication date: May 1, 2008
    Applicant: Shanghai Ultimate Power Communications Technology Co., Ltd.
    Inventors: Yingmin Wang, Guiliang Yang, Yuanxin Qiao
  • Patent number: 7319888
    Abstract: The invention discloses a method for transmitting high-speed downlink package data in a mobile communication system with a smart antenna, which not only can take full advantage of radio beamforming of smart antenna but also can transmit downlink package data high efficiency.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: January 15, 2008
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Shihe Li, Guiliang Yang
  • Patent number: 7295842
    Abstract: A handover method in a mobile communication system, wherein, while maintaining communication with a certain base station before handover, a mobile terminal measures signals of adjacent cells and confirms the candidate handover target base stations; the mobile terminal sends measurement report to network; inserting the procedure of pre-synchronization between the mobile terminal and the handover target base station, including: while sending measurement report to the network, the mobile terminal sends training sequence to the handover target base station; after receiving the training sequence, the handover target base station sends training sequence response message to the mobile terminal; the mobile terminal maintains open-loop or closed-loop synchronization with the handover target base station; the network sends handover command to the mobile terminal; the mobile terminal directly switches to the handover target base station according the handover command; wireless link between the mobile terminal and the ha
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: November 13, 2007
    Assignee: Da Tang Mobile Communications Equipment Co., Ltd.
    Inventors: Guiliang Yang, Chenguang Li, Feng Li, Jinling Hu, Darun Wang
  • Publication number: 20070058701
    Abstract: The present invention discloses a method for detecting orthogonal code CDMA signal implemented mainly through the following steps: estimating the total power of interference to the multi-path signals; performing matched filtering on the multi-path signals and performing maximum ratio combining on the multi-path signals by utilizing the total power of interference to the multi-path signals, to obtain the optimized matched filtering result; and performing joint detection on the optimized matched filtering result. There are two schemes for implementing: if the optimized matched filtering detection scheme is used, only the first two main steps are executed; if the joint detection scheme is used, all of the three steps are executed. In either of above two schemes, the interference code channels involved in the estimation of total power of interference to the multi-path signals are need to be selected, i.e.
    Type: Application
    Filed: July 29, 2004
    Publication date: March 15, 2007
    Applicant: Da Tang Mobile Communications Equipment Co., Ltd.
    Inventors: Yingmin Wang, Guiliang Yang, Chengguo Sun
  • Publication number: 20060003760
    Abstract: The present invention relates to relay communication equipment, relay communication methods thereof and a mobile communication system adopting the relay communication equipment. The relay communication equipment generally comprises a general control unit comprised of a digital signal processor; a terminal access function unit comprised of a radio frequency transceiver and physical layer signal processing equipment as well as independent antenna and feeder thereof; a base station function unit comprised of a radio frequency transceiver and physical layer signal processing equipment as well as independent antenna and feeder thereof, for implementing radio signal transmission and receiving between the relay communication equipment and a certain base station in a mobile communication network as well as that between the relay communication equipment and mobile terminals. The mobile communication system adopting relay communication equipment comprises at least one the relay communication equipment.
    Type: Application
    Filed: July 28, 2005
    Publication date: January 5, 2006
    Inventors: Shihe Li, Feng Li, Guiliang Yang
  • Publication number: 20050282574
    Abstract: A power-control method base on Downlink Piloting Time Slot (DwPTS) in a mobile communication system. While a terminal is being accessed randomly, the terminal determines the transmitting signal power at Uplink Piloting Time Slot (UpPTS) for open-loop power control by using broadcast information and the measured DwPTS power.
    Type: Application
    Filed: July 8, 2005
    Publication date: December 22, 2005
    Applicant: Da Tang Mobile Communications Equipment Co., Ltd.
    Inventors: Shihe Li, Guiliang Yang
  • Publication number: 20050272426
    Abstract: A handover method in a mobile communication system, wherein, while maintaining communication with a certain base station before handover, a mobile terminal measures signals of adjacent cells and confirms the candidate handover target base stations; the mobile terminal sends measurement report to network; inserting the procedure of pre-synchronization between the mobile terminal and the target base station, including: while sending measurement report to the network, the mobile terminal sends training sequence to the target base station; after receiving the training sequence, the target base station sends training sequence response message to the mobile terminal; the mobile terminal maintains open-loop or closed-loop synchronization with the target base station; the network sends handover command to the mobile terminal; the mobile terminal directly switches to the target base station according the handover command; wireless link between the mobile terminal and the handover-forward base station is released.
    Type: Application
    Filed: June 9, 2005
    Publication date: December 8, 2005
    Applicant: Da Tang Mobile Communications Equipment Co., Ltd.
    Inventors: Guiliang Yang, Chenguang Li, Feng Li, Jinling Hu, Darun Wang
  • Publication number: 20050266849
    Abstract: The present invention relates to a method for constructing a self-organizing mobile communication system which is mobile, self-organizing and can make common commercial terminals communicates with outside, comprising: searching for the pilot signals of adjacent area base stations in a manner similar to user terminals by a base station without direct connection to a base station controller, setting the local area covered by the base station as the next lower-level area of the adjacent area through responding to the pilot signals by the base station so as to form a subordinate relationship to the adjacent area; conducting relay communications by base stations at each above level, wherein the relay communication starting from a second or below-second-level area base station by a commercial user terminal covered by the second or below-second-level area base station, eventually establishing communications between the commercial user terminal and the base station controller in a public mobile communication system v
    Type: Application
    Filed: May 12, 2005
    Publication date: December 1, 2005
    Inventors: Feng Li, Shihe Li, Guiliang Yang
  • Publication number: 20050152303
    Abstract: The invention discloses a method for transmitting high-speed downlink package data in a mobile communication system with a smart antenna, which not only can take full advantage of radio beamforming of smart antenna but also can transmit downlink package data high efficiency.
    Type: Application
    Filed: March 7, 2003
    Publication date: July 14, 2005
    Inventors: Shihe Li, Guiliang Yang