Patents by Inventor JIANFENG WENG

JIANFENG WENG 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: 11528088
    Abstract: Systems and methods for enhanced link adaptation are provided. In some embodiments, a method of operation of a network node includes calculating an actual RE efficiency based at least in part on an actual TBS obtained from a specification. The TBS may be obtained from a specification based on LA result and actual buffer data volume. The method also includes determining a real BLER from a searchable repository, based on the actual RE efficiency and an actual BLER. The method may further include calculating an actual outer-loop adjustment (OLA) step based on the actual BLER. The method may further include a dynamic outer-loop up/down step adjustment based on the actual OLA step.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: December 13, 2022
    Assignee: Telefonaktiebolaget LM Ericsson (PUBL)
    Inventors: Xixian Chen, Jun Wang, James Jianfeng Weng
  • Patent number: 11457453
    Abstract: A method and system for performing link adaptation are disclosed. According to one aspect, a method in a wireless communication system for performing link adaptation is provided. The method includes, when a first measure of channel quality is higher than a first predetermined amount, using a first outer loop adjustment process directed to determining link adaptation for a first data transmission transmitted to a wireless device. The method also includes, when the first measure of channel quality is lower than a second predetermined amount, using a second outer loop adjustment process different from the first outer loop adjustment process directed to determining link adaptation for a second data transmission transmitted to the wireless device.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: September 27, 2022
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Xixian Chen, Chandra Sekhar Bontu, Jianguo Long, James Jianfeng Weng
  • Patent number: 11419005
    Abstract: There is provided a method performed by a wireless device for handling user data, wherein the user data are converted into codewords, each codeword having a first group of layers and a second group of layers. The method comprises: receiving an index from a network node, the index indicating a Transport Block Size (TBS) index, a Redundant Version (RV) and a differential modulation; determining a TBS based on the received index; determining a redundant version value based on the received index; determining a first modulation order for the first group and a second modulation order for the second group of a codeword, based on the differential modulation; and performing one of decoding and encoding the codeword based at least on the determined first and second modulation orders, the determined TBS and the determined redundant version value.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: August 16, 2022
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Xixian Chen, Jun Wang, James Jianfeng Weng
  • Publication number: 20220030487
    Abstract: A method, in a network in which a handover of a wireless device occurs, the User Equipment (UE) moving from a source cell to a target cell, is provided. The method comprises at least: (at the source cell) determining a sequence number (SN) related to a data packet; forwarding at the RLC layer data packets to the target cell, the data packets being previously sent to the UE but unacknowledged by the UE and having SNs inferior to the determined sequence number; and sending the determined SN to the target cell. The method further comprises (at the target cell) sending a first data packet with the determined SN to the wireless device; the determined SN being a demarcation line for using different encryption keys. The UE will decrypt the received data packets having SNs inferior to the determined SN using an encryption key from the source cell; and decrypt received packets having SNs superior to the determined SN using an encryption key from the target cell.
    Type: Application
    Filed: September 18, 2018
    Publication date: January 27, 2022
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Xixian CHEN, James Jianfeng WENG, Jun WANG
  • Patent number: 11128503
    Abstract: A method is provided for communication in a wireless telecommunication system. The method comprises multiplexing, by a network element, at least one symbol of a PHICH onto at least one resource element of a PCFICH.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: September 21, 2021
    Assignee: BlackBerry Limited
    Inventors: Yiping Wang, Jun Li, Jianfeng Weng
  • Patent number: 11075711
    Abstract: According to one aspect of the disclosure, a network node for adjusting a maximum channel code rate limit of a wireless device is provided. The network node includes processing circuitry. The processing circuitry includes a processor and a memory. The memory contains instructions that, when executed by the processor, configure the processor to: cause transmission, to the wireless device, of at least one data transmission coded at a maximum channel code rate that is one of less than and equal to a maximum channel code rate limit, receive at least one indication of reception of the at least one data transmission coded at the maximum channel code rate by the wireless device, and in response to receiving the at least one indication of reception associated with the at least one data transmission coded at the maximum channel code rate, modify the maximum channel code rate limit.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: July 27, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: James Jianfeng Weng, Xixian Chen, Hua Xu
  • Publication number: 20210084532
    Abstract: There is provided a method performed by a wireless device for handling user data, wherein the user data are converted into codewords, each codeword having a first group of layers and a second group of layers. The method comprises: receiving an index from a network node, the index indicating a Transport Block Size (TBS) index, a Redundant Version (RV) and a differential modulation; determining a TBS based on the received index; determining a redundant version value based on the received index; determining a first modulation order for the first group and a second modulation order for the second group of a codeword, based on the differential modulation; and performing one of decoding and encoding the codeword based at least on the determined first and second modulation orders, the determined TBS and the determined redundant version value.
    Type: Application
    Filed: June 6, 2018
    Publication date: March 18, 2021
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Xixian CHEN, Jun WANG, James Jianfeng WENG
  • Publication number: 20210050935
    Abstract: Systems and methods for enhanced link adaptation are provided. In some embodiments, a method of operation of a network node includes calculating an actual RE efficiency based at least in part on an actual TBS obtained from a specification. The TBS may be obtained from a specification based on LA result and actual buffer data volume. The method also includes determining a real BLER from a searchable repository, based on the actual RE efficiency and an actual BLER. The method may further include calculating an actual outer-loop adjustment (OLA) step based on the actual BLER. The method may further include a dynamic outer-loop up/down step adjustment based on the actual OLA step.
    Type: Application
    Filed: February 6, 2018
    Publication date: February 18, 2021
    Inventors: Xixian CHEN, Jun WANG WANG, James Jianfeng WENG
  • Publication number: 20210036799
    Abstract: According to one aspect of the disclosure, a network node for adjusting a maximum channel code rate limit of a wireless device is provided. The network node includes processing circuitry. The processing circuitry includes a processor and a memory. The memory contains instructions that, when executed by the processor, configure the processor to: cause transmission, to the wireless device, of at least one data transmission coded at a maximum channel code rate that is one of less than and equal to a maximum channel code rate limit, receive at least one indication of reception of the at least one data transmission coded at the maximum channel code rate by the wireless device, and in response to receiving the at least one indication of reception associated with the at least one data transmission coded at the maximum channel code rate, modify the maximum channel code rate limit.
    Type: Application
    Filed: April 29, 2016
    Publication date: February 4, 2021
    Inventors: James Jianfeng WENG, Xixian CHEN, Hua XU
  • Publication number: 20200153538
    Abstract: There is provided a method performed by a wireless device for handling user data. The method comprises: receiving an index (such as a Transport Block Size (TBS) index) from a network node; determining a TBS based on the received index; determining a modulation order based at least on the determined TBS; and performing one of decoding and encoding the user data based at least on the determined modulation order.
    Type: Application
    Filed: June 13, 2018
    Publication date: May 14, 2020
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Xixian CHEN, Jung-Fu CHENG, James Jianfeng WENG, Jun Wang
  • Publication number: 20190334747
    Abstract: A method is provided for communication in a wireless telecommunication system. The method comprises multiplexing, by a network element, at least one symbol of a PHICH onto at least one resource element of a PCFICH.
    Type: Application
    Filed: July 9, 2019
    Publication date: October 31, 2019
    Inventors: Yiping Wang, Jun Li, Jianfeng Weng
  • Publication number: 20190297630
    Abstract: A method and system for performing link adaptation are disclosed. According to one aspect, a method in a wireless communication system for performing link adaptation is provided. The method includes, when a first measure of channel quality is higher than a first predetermined amount, using a first outer loop adjustment process directed to determining link adaptation for a first data transmission transmitted to a wireless device. The method also includes, when the first measure of channel quality is lower than a second predetermined amount, using a second outer loop adjustment process different from the first outer loop adjustment process directed to determining link adaptation for a second data transmission transmitted to the wireless device.
    Type: Application
    Filed: June 7, 2016
    Publication date: September 26, 2019
    Inventors: Xixian CHEN, Chandra Sekhar BONTU, Jianguo LONG, James Jianfeng WENG
  • Patent number: 10355899
    Abstract: A method is provided for communication in a wireless telecommunication system. The method comprises multiplexing, by a network element, at least one symbol of a PHICH onto at least one resource element of a PCFICH.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: July 16, 2019
    Assignee: BlackBerry Limited
    Inventors: Yiping Wang, Jun Li, Jianfeng Weng
  • Patent number: 10260059
    Abstract: The disclosure provides a nitrilase from Arabis alpina, which belongs to genus Arabis, family brassicaceae. The disclosure further provides the encoding gene, vector, recombinant bacterial strain, and the application in the manufacturing of (S)-3-cyano-5-methylhexanoic acid. The wet resting cells containing nitrilase Aa-Nit can kinetically resolve racemic IBSN at 1.2 M with a 42% conversion rate in 15 hr and >99% ee value. The disclosure provides a regio- and stereoselective method for the preparation of (S)-3-cyano-5-methylhexanoic acid. This method provides an atom economical, mild, environmental friendly industrial method to manufacture (S)-3-cyano-5-methylhexanoic acid.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: April 16, 2019
    Assignees: Zhejiang University of Technology, Zhejiang Chiral Medicine Chemicals Co. Ltd.
    Inventors: Renchao Zheng, Yuguo Zheng, Qin Zhang, Youming Huang, Jianfeng Weng, Tianchun Liu, Weirong Fan
  • Patent number: 10171146
    Abstract: Systems and methods for Multiple-Input and Multiple-Output (MIMO) rank reduction to improve downlink throughput are disclosed. A method of operation of a radio access node includes determining that an imbalance between parallel channels of a spatial multiplexing downlink transmission to a wireless device is greater than an imbalance threshold and/or that a Negative Acknowledgement (NACK) rate over time for the parallel channels of a spatial multiplexing downlink transmission reported by the wireless device is greater than a NACK rate threshold. The method also includes, in response to determining that the imbalance between the parallel channels is greater than the imbalance threshold and/or that the NACK rate is greater than the NACK rate threshold, performing a fast rank reduction for a next downlink transmission whereby a rank is reduced from a rank indicator reported by the wireless device to some lower rank. Reducing the rank may improve downlink throughput.
    Type: Grant
    Filed: February 16, 2015
    Date of Patent: January 1, 2019
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: James Jianfeng Weng, Hua Xu, Xixian Chen, Jianguo Long, Guoqiang Lu, Michael Roger, Ying Shao, Michel Chauvin
  • Patent number: 10111248
    Abstract: A method and user equipment for cross-subframe scheduling at a user equipment, the method receiving an indication for scheduling a subframe; mapping the indication to the subframe; and detecting the subframe on a frequency at a time associated with the subframe. Further, a method and apparatus of cross-carrier scheduling, the method obtaining an indication that at least one downlink subframe on at least one secondary carrier is not scheduled by a primary carrier; and scanning the at least one secondary carrier for scheduling information for the at least one downlink subframe.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: October 23, 2018
    Assignee: BlackBerry Limited
    Inventors: Yiping Wang, Jun Li, Jianfeng Weng
  • Patent number: 10100297
    Abstract: The disclosure provides a nitrilase from Arabis alpina, which belongs to genus Arabis, family brassicaceae. The disclosure further provides the encoding gene, vector, recombinant bacterial strain, and the application in the manufacturing of (S)-3-cyano-5-methylhexanoic acid. The wet resting cells containing nitrilase Aa-Nit can kinetically resolve racemic IBSN at 1.2 M with a 42% conversion rate in 15 hr and >99% ee value. The disclosure provides a regio- and stereoselective method for the preparation of (S)-3-cyano-5-methylhexanoic acid. This method provides an atom economical, mild, environmental friendly industrial method to manufacture (S)-3-cyano-5-methylhexanoic acid.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: October 16, 2018
    Assignees: ZHEJIANG CHIRAL MEDICINE CHEMICALS CO. LTD., ZHEJIANG UNIVERSITY OF TECHNOLOGY
    Inventors: Renchao Zheng, Yuguo Zheng, Qin Zhang, Youming Huang, Jianfeng Weng, Tianchun Liu, Weirong Fan
  • Patent number: 10051575
    Abstract: In some implementations, a method in a user equipment (UE) for adaptively determining a wakeup period includes determining a power level of a Downlink (DL) transmission from a base station during a first wakeup period within a Discontinuous Reception (DRX) inactive time. The UE deactivates a RF receiver in response to the determination of the second wakeup period. The UE activates the RF receiver at a beginning of the second wakeup period prior to a DRX active time. The UE receives a DL paging channel transmission during the DRX active time.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: August 14, 2018
    Assignee: BlackBerry Limited
    Inventors: Jianfeng Weng, Andrew Mark Earnshaw, Xin Jin
  • Patent number: 10003433
    Abstract: Systems and methods for control signal outer-loop adjustment are disclosed. In some embodiments, a method of operation of a network node in a cellular communications network is provided. The method includes transmitting a control signal and a data signal to a wireless device. The method also includes detecting an ambiguous state of reception of the control signal by the wireless device based on a feedback of reception of the data signal. The method also includes, in response to detecting the ambiguous state of reception, updating a link adaptation (LA) parameter used to choose a coding scheme and power level for transmission of information in the control signal. By updating the LA parameter in response to detecting the ambiguous state of reception, the network node may provide improved performance.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: June 19, 2018
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Xixian Chen, James Jianfeng Weng, Ahmed Nouah, Ying Shao
  • Patent number: 9955463
    Abstract: A method at a user equipment having a scheduling carrier and at least one scheduled carrier, the method receiving, at a first subframe from the scheduling carrier, a downlink control indication containing a downlink assignment for the user equipment on the scheduled carrier; and turning on a receiver of the user equipment for the scheduled carrier at a future downlink subframe based on the downlink assignment. Further, a method, at a scheduling cell having a scheduling carrier, for scheduling downlink data reception on a scheduled carrier, the method setting a time skew for the scheduled carrier such that a data transmission start time for a subframe at the scheduled carrier is greater than a blind latency decode time on the scheduling carrier.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: April 24, 2018
    Assignee: BlackBerry Limited
    Inventors: Jianfeng Weng, Yiping Wang, Jun Li