Patents by Inventor Wenfeng Zhang

Wenfeng 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).

  • Publication number: 20190072662
    Abstract: The presented invention claims new method for transmission of a quantization value by segmenting the quantization range into a number of number of contiguous value ranges, and using a quantization with scaling in each of value range, to reduce the quantization error, wherein the quantization is applied to those timing measurements when they are transmitted from the mobile station to the network server.
    Type: Application
    Filed: October 10, 2016
    Publication date: March 7, 2019
    Inventor: Wenfeng Zhang
  • Patent number: 10080217
    Abstract: A method of using synchronization signal as demodulation reference signal is performed at an eNB in case that the demodulation reference signal is punctured by synchronization signal in a wireless communication network. The method comprises: determining whether there is a resource element collision between the demodulation reference signal and the synchronization signal; in accordance with a determination that there is a resource element collision between the two signals: using the synchronization signal as the demodulation reference signal in a PRB pair containing the synchronization signal; and transmitting the synchronization signal as the demodulation reference signal to a UE.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: September 18, 2018
    Assignee: ZTE (USA) Inc.
    Inventors: Wenfeng Zhang, Senbao Guo, Yunfeng Sun, Shuqiang Xia
  • Publication number: 20180231648
    Abstract: New method for measuring UE-to-UE distance based on D2D sidelink channel or signal. The network configures the two UEs to perform both transmission and reception of D2D sidelink channel or signal; the UEs determine in time domain the cycle boundaries of the same cycle duration and use the cycle boundaries as the timing references to measure transmission timing and receiving timing; each UE reports to network one transmission timing and one or more receiving timings, or one or more modulo transmission-to-reception time differences; each UE reports to network one transmission identity associated with transmitted D2D sidelink channel or signal and one or more transmission identities each of which associated with a received D2D sidelink channel or signal; the network obtaining the reports from the two UEs matches the timing information based on the associated transmission identities and calculates the UE-to-UE distance based on the matched timing information.
    Type: Application
    Filed: August 8, 2016
    Publication date: August 16, 2018
    Inventor: Wenfeng ZHANG
  • Patent number: 9872311
    Abstract: A method for notifying a downlink demodulation pilot control signaling, includes: a base station side notifying a user equipment (UE) side of an index of a virtual signaling group and/or index of port offset signaling group used when generating a downlink pilot sequence and/or mapping the generated downlink pilot sequence through at least one of the following information: UE-specific or common high layer signaling; antenna indication information of DL_Grant; new data indication information in a Disable TB signaling in the DL_Grant; scrambling indication information in the DL_Grant; in a UE-specific or common search space, an aggregation level of the DL_Grant, a relative position of a first control channel element of the DL_Grant in the UE-specific or common search space, a subframe number where the DL_Grant is located and a system frame number where the DL_Grant is located.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: January 16, 2018
    Assignee: ZTE Corporation
    Inventors: Senbao Guo, Yunfeng Sun, Junfeng Zhang, Dongli Chen, Wenfeng Zhang
  • Patent number: 9866417
    Abstract: Disclosed are a method for transmitting a demodulation reference signal (DMRS), a base station and a user equipment, related to the LTE Advanced system. The method for transmitting the DMRS disclosed in the present document includes: a base station transmitting a plurality of demodulation reference signal (DMRS) ports through frequency division multiplexing (FDM) and/or code division multiplexing (CDM) and/or time division multiplexing (TDM). The embodiment of the present invention further discloses a base station and a user equipment. The technical scheme of the present application greatly boosts the DMRS demodulation performance, especially taking into account its use in the 256QAM modulation method in future, balances interpolation performance of various PRB Pairs in one sub-frame, and it avoids a collision between a DMRS and a RCRS, a PSS/SSS as well as a CSI-RS.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: January 9, 2018
    Assignee: ZTE Corporation
    Inventors: Senbao Guo, Yunfeng Sun, Zhisong Zuo, Wenfeng Zhang, Junfeng Zhang
  • Patent number: 9774315
    Abstract: Methods and apparatus are described for a differential active inductor load for inductive peaking in which cross-coupled capacitive elements are used to cancel out, or at least reduce, the limiting effect of the gate-to-drain capacitance (Cgd) of transistors in the active inductor load. The cross-coupled capacitive elements extend the range over which the active inductor load behaves inductively and increase the quality factor (Q) of each active inductor. Therefore, the achievable inductive peaking of the load is significantly increased, which leads to providing larger signal swing across the load for a given power or, alternatively, lower power for a given signal swing.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: September 26, 2017
    Assignee: XILINX, INC.
    Inventors: Jinyung Namkoong, Wenfeng Zhang, Parag Upadhyaya
  • Patent number: 9717048
    Abstract: Disclosed herein are methods and apparatus for network energy savings in a wireless communication system, such as the 3GPP LTE system. Particularly, one such method reduces power consumption in a base station by selectively muting or disabling downlink transmissions of certain control signal symbols in one or more subframes or frames. The disclosed methods and apparatus can apply independently or in combination in both FDD and TDD systems.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: July 25, 2017
    Assignee: ZTE CORPORATION
    Inventor: Wenfeng Zhang
  • Publication number: 20170134009
    Abstract: Methods and apparatus are described for a differential active inductor load for inductive peaking in which cross-coupled capacitive elements are used to cancel out, or at least reduce, the limiting effect of the gate-to-drain capacitance (Cgd) of transistors in the active inductor load. The cross-coupled capacitive elements extend the range over which the active inductor load behaves inductively and increase the quality factor (Q) of each active inductor. Therefore, the achievable inductive peaking of the load is significantly increased, which leads to providing larger signal swing across the load for a given power or, alternatively, lower power for a given signal swing.
    Type: Application
    Filed: November 5, 2015
    Publication date: May 11, 2017
    Applicant: Xilinx, Inc.
    Inventors: Jinyung Namkoong, Wenfeng Zhang, Parag Upadhyaya
  • Publication number: 20170055256
    Abstract: A method of determining an uplink subframe type by user equipment includes the following steps: receiving an uplink grant from a base station, wherein the uplink grant is associated with a first flexible subframe within a first radio frame; determining a first index of the first flexible subframe within the first radio frame; identifying a second flexible subframe within a second radio frame; determining a second index of the second flexible subframe within the second radio frame; and determining a type for the second flexible subframe based at least on the first index of the first flexible subframe and the second index of the second flexible subframe. In some embodiments, the first and second radio frames are the same one. In other embodiments, the first and second radio frames are two different ones that fall within the same downlink/uplink configuration period.
    Type: Application
    Filed: February 10, 2015
    Publication date: February 23, 2017
    Applicant: ZTE Corporation
    Inventor: Wenfeng ZHANG
  • Patent number: 9564995
    Abstract: A retransmission method for a time division duplexing self-adaptive frame structure, and a network side device relate to a technology of dynamically allocating uplink and downlink sub-frames in an LTE-advance (3GPP Release11) TDD communication system. The method comprises: during transmission of a TDD self-adaptive frame, for an uplink sub-frame, if a frame structure, of which an RTT period of PHICH and PUSCH of the uplink sub-frame is 10 ms, corresponding to the uplink sub frame is found in 7 types of defined frame structures, then sending PHICH data on a corresponding downlink sub-frame in the found frame structure, and sending retransmission data on the corresponding uplink sub-frame in the found frame structure. The solution ensures HARQ compatibility of an uplink data channel of R10UE. In addition, A/N feedback of the PDSCH is configured according to the uplink A/N resolution, thereby improving retransmission performance.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: February 7, 2017
    Assignee: ZTE Corporation
    Inventors: Xiaobo Zhang, Bin Yu, Wenfeng Zhang
  • Publication number: 20170034727
    Abstract: The embodiments of the present document provide a method and apparatus for measuring channel state information, wherein the method includes: a terminal device determining one or more downlink subframes which are located before a subframe where aperiodic Channel State Information (CSI) report trigger information is located and belong to a specified subframe group to be CSI reference resources for the specified subframe group; and the terminal device acquiring a CSI measurement result on the CSI reference resources and generating a CSI report corresponding to the specified subframe group.
    Type: Application
    Filed: July 16, 2014
    Publication date: February 2, 2017
    Inventors: Yu Ngok LI, Weimin LI, Chunli LIANG, Wenfeng ZHANG
  • Patent number: 9538477
    Abstract: The embodiments of the present invention disclose an uplink power control method, a terminal and a base station, which can adjust or determine uplink transmission power of a terminal on subframes which belong to different subframe groups respectively. The method includes: a base station determining subframe group information, the subframe group information being used by a terminal to determine uplink transmission power adjustment amounts on subframes which belong to different subframe groups; and the base station transmitting the subframe group information to the terminal. A terminal determines uplink transmission power adjustment amounts on subframes which belong to different subframe groups, and determines uplink transmission power on corresponding subframes according to the determined uplink transmission power adjustment amounts on the subframes which belong to the different subframe groups.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: January 3, 2017
    Assignee: ZTE Corporation
    Inventors: Weimin Li, Yu Ngok Li, Lu Ren, Peng Hao, Wenfeng Zhang
  • Patent number: 9537610
    Abstract: A technology of dynamically allocating uplink and downlink subframes in an LTE-advanced Time Division Duplex (TDD) communication system specifically relates to a TDD adaptive frame structure retransmission method, network and terminal side device. The method includes: in a TDD adaptive frame transmission process, for an uplink subframe, if a frame structure whose Round Trip Time (RTT) period of a Physical Hybrid-ARQ Indicator Channel (PHICH) and a Physical Uplink Shared Channel (PUSCH) corresponding to the uplink subframe is 10 ms is found in seven already defined frame structures, transmitting PHICH data on a corresponding downlink subframe in the found frame structure, and receiving retransmitted data on the corresponding uplink subframe in the found frame structure. The technical solution of the present application ensures the Hybrid Automatic Repeat Request (HARQ) compatibility with an uplink data channel of an R10UE.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: January 3, 2017
    Assignee: ZTE CORPORATION
    Inventors: Xiaobo Zhang, Bin Yu, Wenfeng Zhang
  • Publication number: 20160219538
    Abstract: Provided are a sending method and device. In the sending method, one or more time-domain signals corresponding to one or more frequency-domain signals except primary synchronization frequency-domain signals are acquired; one primary synchronization time-domain signal is determined in at least two pre-stored primary synchronization time-domain signals and weighted processing is performed on the determined primary synchronization time-domain signal; and a signal which is obtained by adding the weighted primary synchronization time-domain signal and the one or more time-domain signals is sent. According to the solution, the problem of relatively undiversified signal sending manner in the related technology is solved, and diversified sending manners are implemented.
    Type: Application
    Filed: January 22, 2016
    Publication date: July 28, 2016
    Inventors: Hongfeng YUAN, Jie LI, Wenfeng ZHANG
  • Publication number: 20160124227
    Abstract: A device comprising means for engaging said device to at least a portion of an outside surface of a glass of a headwear, means for engaging said device to at least a portion of an inside surface of glass of said headwear, means for mounting a display module or video capturing device and said means for engaging said device to at least a portion of an inside surface of a headwear to said device, and means for adjusting a viewing angle of said display module or video capturing device with a generally 360 degrees rotation.
    Type: Application
    Filed: October 31, 2014
    Publication date: May 5, 2016
    Inventors: Hai Yong Zhang, Wenfeng Zhang, Chenchen Zheng, Peng Shao, Jia Chi Wu, Jia Ning Zhao, David Pommerenke
  • Publication number: 20160119901
    Abstract: A method of using synchronization signal as demodulation reference signal is performed at an eNB in case that the demodulation reference signal is punctured by synchronization signal in a wireless communication network. The method comprises: determining whether there is a resource element collision between the demodulation reference signal and the synchronization signal; in accordance with a determination that there is a resource element collision between the two signals: using the synchronization signal as the demodulation reference signal in a PRB pair containing the synchronization signal; and transmitting the synchronization signal as the demodulation reference signal to a UE.
    Type: Application
    Filed: May 7, 2014
    Publication date: April 28, 2016
    Inventors: Wenfeng ZHANG, Senbao GUO, Yunfeng SUN, Shuqiang XIA
  • Publication number: 20160066176
    Abstract: A method is performed at a base station for transmitting ePDCCH to a user equipment. The method includes: selecting a user equipment within a service area of the base station; determining PRS configuration information that is configured with the user equipment; and choosing a strategy for transmitting ePDCCH to the user equipment in accordance with the determination of the PRS configuration information configured with the user equipment.
    Type: Application
    Filed: April 16, 2014
    Publication date: March 3, 2016
    Inventor: Wenfeng ZHANG
  • Patent number: D828839
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: September 18, 2018
    Assignee: C-SMARTLINK INFORMATION TECHNOLOGY CO., LIMITED
    Inventor: Wenfeng Zhang
  • Patent number: D828840
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: September 18, 2018
    Assignee: C-SMARTLINK INFORMATION TECHNOLOGY CO., LIMITED
    Inventor: Wenfeng Zhang
  • Patent number: D828841
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: September 18, 2018
    Assignee: C-SMARTLINK INFORMATION TECHNOLOGY CO., LIMITED
    Inventor: Wenfeng Zhang