Patents by Inventor Pengfei Xia

Pengfei Xia 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).

  • System and Method for Reporting Beam Information
    Publication number: 20190150010
    Abstract: A method for reporting beam information includes setting, by a user equipment (UE), a report type of a beam information report, wherein the beam information report includes beam indices of communications beams being reported, a reference beam quality measurement of one of the communications beams reported, and a report type field conveying the report type, and sending, by the UE to an access node, the beam information report.
    Type: Application
    Filed: June 6, 2018
    Publication date: May 16, 2019
    Inventors: Young Hoon Kwon, Pengfei Xia, Bin Liu
  • System and Method for Indicating Wireless Channel Status
    Publication number: 20190141691
    Abstract: A method for operating a user equipment includes receiving a first frame on a first channel associated with a first beam identified during a beam failure recovery procedure, and determining that an assumed quasi-co-located relationship exists between the first channel and the first beam, and based thereon, decoding the first frame in accordance with a first reference signal on the first channel and using a first spatial domain receive filter that was used to decode the first beam.
    Type: Application
    Filed: May 23, 2018
    Publication date: May 9, 2019
    Inventors: Young Hoon Kwon, Pengfei Xia, Bin Liu
  • Resource and Power Allocation Indication in Beam-based Access System
    Publication number: 20190141712
    Abstract: A method for resource and power allocation indication in a beam-based access system is provided. In an embodiment, a method for signaling power allocation in a beam-based access system includes determining, by a transmit point (TP), a relative effective transmit power offset between a control beam and a data beam. The method also includes signaling, by the TP, the relative effective transmit power offset to a user equipment (UE). The UE performs automatic gain control (AGC) on a control channel and a data channel according to the relative effective transmit power offset signaled by the TP.
    Type: Application
    Filed: December 28, 2018
    Publication date: May 9, 2019
    Inventors: Bin Liu, Richard Stirling-Gallacher, Pengfei Xia
  • System and Method for Request Multiplexing
    Publication number: 20190075599
    Abstract: A method for operating a user equipment (UE) includes detecting that a first request type of a first request is not a beam failure recovery request (BFRQ) and based thereon, selecting a first random access resource for transmitting the first request, wherein the first random access resource is selected from a first subset of one or more random access resources, and wherein random access resources in the first subset are associated with a communications beam serving the UE, and transmitting, by the UE to an access node, the first request in the first random access resource.
    Type: Application
    Filed: May 3, 2018
    Publication date: March 7, 2019
    Inventors: Pengfei Xia, Young Hoon Kwon, Bin Liu
  • System and Method for Random Access Communications
    Publication number: 20190075600
    Abstract: A method for operating an access node includes receiving a first random access preamble in a first random access resource, wherein the first random access preamble and the first random access resource at least partially identifies a first beam selected by a user equipment (UE), and wherein the first random access resource is one of a plurality of random access resources assigned to the UE, and determining that first additional information associated with the first beam is needed, and based thereon, sending a first message responsive to the first random access preamble, the first message including a first information set to request the additional information associated with the first beam, and receiving a second message including the first additional information associated with the first beam.
    Type: Application
    Filed: May 25, 2018
    Publication date: March 7, 2019
    Inventors: Young Hoon Kwon, Pengfei Xia, Bin Liu
  • System and Method for HARQ Acknowledgement
    Publication number: 20190075573
    Abstract: According to one aspect of the present disclosure, there is provided a method that includes: transmitting, by a base station, scheduling information for a first uplink transmission to a user equipment with a first beam; receiving, by the base station, a first transmission of the first uplink transmission from the user equipment; and modifying, by the base station, transmission of an acknowledgment for the first uplink transmission in response to receiving an indication from the user equipment that the first beam has failed.
    Type: Application
    Filed: February 21, 2018
    Publication date: March 7, 2019
    Inventors: Young Hoon Kwon, Pengfei Xia, Bin Liu
  • APPARATUS AND METHOD FOR BEAM FAILURE RECOVERY
    Publication number: 20190074891
    Abstract: The disclosure relates to technology for assigning resources to user equipment for a beam failure recovery by a base station. The base station identifies a beam failure random access channel (BRACH) resource holding beam correspondence with a synchronization signal (SS) block resource covering the user equipment, and assigns the user equipment one or more BRACH preambles for each BRACH resource assigned to the user equipment, excluding the BRACH resource holding beam correspondence with the SS block resource covering the user equipment.
    Type: Application
    Filed: October 27, 2017
    Publication date: March 7, 2019
    Applicant: Futurewei Technologies, Inc.
    Inventors: Young Hoon Kwon, Bin Liu, Pengfei Xia
  • Clear channel assessment (CCA) threshold adaptation method
    Patent number: 10225806
    Abstract: Methods and apparatuses are described herein for determining a transmit power based on clear channel assessment (CCA) thresholds. A station (STA) associated with a first Basic Service Set (BSS) may receive, from an access point (AP) associated with the first BSS, a clear channel assessment (CCA) value for a group of STAs associated with a second BSS. The CCA value may indicate a minimum CCA threshold for a packet received from the second BSS. The STA may then determine, based on the CCA value, a STA specific CCA parameter and a target CCA parameter. The target CCA parameter may be greater than or equal to the STA specific CCA parameter. Based on the STA specific CCA parameter and the target CCA parameter, the STA may determine a target transmit power control (TPC) parameter of the STA, wherein the sum of target TPC parameter and target CCA parameter is constant.
    Type: Grant
    Filed: October 30, 2017
    Date of Patent: March 5, 2019
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Oghenekome Oteri, Pengfei Xia, Xiaofei Wang, Hanqing Lou, Monisha Ghosh, Robert L. Olesen, Nirav B. Shah, Frank La Sita
  • System and Method for Beam Failure Recovery
    Publication number: 20190053312
    Abstract: A method for operating a user equipment (UE) includes detecting a failure of a first link between the UE and an access node, and based thereon, detecting a second link between the UE and the access node, sending, to the access node, a beam failure recovery request (BFRQ) on one or more physical random access channel (PRACH) resources associated a third link conveying a reference signal, wherein the third link and the second link are quasi co-located (QCLed), wherein the BFRQ includes a group identifier associated with a UE group including the UE, and monitoring one or more PRACH response opportunities associated with the one or more PRACH resources for a beam failure recovery response (BFRP).
    Type: Application
    Filed: December 8, 2017
    Publication date: February 14, 2019
    Inventors: Pengfei Xia, Young Hoon Kwon, Bin Liu
  • APPARATUS AND METHOD FOR BEAM FAILURE RECOVERY
    Publication number: 20190052337
    Abstract: The disclosure relates to technology for identifying a user equipment beam index in a base station. The base station indicates one or more resources assigned to the user equipment within a beam failure random access channel (BRACH) resource, and transmits one or more synchronization signal block resources and one or more new beam identification reference signal resources to the user equipment. The base station then receives one of the resources from a group of the one or more resources within the BRACH resource assigned to the user equipment corresponding to the BRACH resource, and identifies a preferred beam index of the user equipment based on information in the BRACH resource and the received one of the resources.
    Type: Application
    Filed: October 17, 2017
    Publication date: February 14, 2019
    Applicant: Futurewei Technologies, Inc.
    Inventors: Young Hoon Kwon, Bin Liu, Pengfei Xia
  • BEAM FAILURE RECOVERY REQUEST
    Publication number: 20190053294
    Abstract: The disclosure relates to technology for beam failure recovery in user equipment, comprising detecting a beam failure event between the user equipment and a base station, sending a first beam failure recovery request (BFRQ) to the base station upon detection of the beam failure and searching for a beam failure recovery response (BFRP) within a first response window.
    Type: Application
    Filed: November 15, 2017
    Publication date: February 14, 2019
    Applicant: Futurewei Technologies, Inc.
    Inventors: Pengfei Xia, Young Hoon Kwon, Bin Liu
  • System and Method for Transmit Power Control
    Publication number: 20190044792
    Abstract: A method for operating a user equipment (UE) includes detecting that a beam failure has occurred, and based thereon, transmitting a first beam failure recovery request (BFRR) message at a first transmit power level on a first channel resource in a channel with a transmit power control mechanism configured to set the first transmit power level different from a first non-BFRR transmit power level of a first non-BFRR message transmitted on the first channel resource in the channel.
    Type: Application
    Filed: October 20, 2017
    Publication date: February 7, 2019
    Inventors: Younghoon Kwon, Pengfei Xia, Bin Liu
  • System and Method for UE Random Access over Wide Bandwidth with Subset Restriction
    Publication number: 20190037596
    Abstract: According to some embodiments, a base station (BS) transmits a first allocation of a plurality of channel subsets to user equipments (UEs) for contention transmission of the UEs to the BS. The first allocation allocates one or more channel subsets to each UE so that each UE can only contend for channels within a channel subset allocated to the UE using a contention-based mechanism. In response to receipt of the first allocation, one or more UEs send requests to the BS requesting for access of channels for uplink transmissions determined by the one or more UEs. The BS determines, based on at least the requests sent by the UEs, channels to be allocated to the UEs for performing uplink transmissions, and sends a second allocation indicating the allocated channels. The UEs then perform uplink transmissions based on the second allocation.
    Type: Application
    Filed: July 26, 2017
    Publication date: January 31, 2019
    Inventors: Bin Liu, Pengfei Xia
  • Resource and power allocation indication in beam-based access system
    Patent number: 10194445
    Abstract: A method for resource and power allocation indication in a beam-based access system is provided. In an embodiment, a method for signaling power allocation in a beam-based access system includes determining, by a transmit point (TP), a relative effective transmit power offset between a control beam and a data beam. The method also includes signaling, by the TP, the relative effective transmit power offset to a user equipment (UE). The UE performs automatic gain control (AGC) on a control channel and a data channel according to the relative effective transmit power offset signaled by the TP.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: January 29, 2019
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Bin Liu, Richard Stirling-Gallacher, Pengfei Xia
  • System and Method for Indicating Scheduling Grants
    Publication number: 20180368104
    Abstract: A method for transmit in an uplink includes receiving from an access node, information associated with a scheduling grant for an uplink transmission, the information comprising position information of a network resource allocated for the uplink transmission and first beam information of a receive beam used by the access node to receive the uplink transmission, selecting a transmit beam used by a user equipment to transmit the uplink transmission, wherein the transmit beam is selected in accordance with the first beam information of the receive beam, and transmitting using the transmit beam, the uplink transmission in accordance with the position information.
    Type: Application
    Filed: June 14, 2017
    Publication date: December 20, 2018
    Inventors: Pengfei Xia, Richard Stirling-Gallacher, Bin Liu
  • Method and Apparatus for Non-Codebook Based Uplink Multiple-Input and Multiple-Output
    Publication number: 20180367205
    Abstract: A method and an apparatus for selecting beams for non-codebook based uplink multiple-input and multiple-output are disclosed. In an embodiment, a method implemented by a user equipment (UE) includes receiving an allocation of at least one sounding reference signal (SRS) resource in an uplink subframe from a transmission and reception point (TRP) for a first set of uplink transmission beams, transmitting precoded SRSs in the at least one SRS resource to the TRP, wherein the precoded SRSs are precoded with UE-selected precoders and at least one rank and receiving an identification of two or more precoders for a second set of uplink transmission beams, wherein the second set of uplink transmission beams is selected from the first set of uplink transmission beams, and wherein the two or more precoders are based on the precoded SRSs.
    Type: Application
    Filed: November 22, 2017
    Publication date: December 20, 2018
    Inventors: Bin Liu, Pengfei Xia, Richard Stirling-Gallacher
  • System and Method for Triggering Beam Recovery
    Publication number: 20180368009
    Abstract: A method for operating a receiving device includes monitoring a transmission from transmitting device, deriving a reliability measure of the transmission, and detecting that a triggering condition comparing the reliability measure with a threshold is met, and based thereon, sending a triggering signal to the transmitting device to trigger a beam failure recovery procedure.
    Type: Application
    Filed: September 18, 2017
    Publication date: December 20, 2018
    Applicants: Futurewei Technologies, Inc., Futurewei Technologies, Inc.
    Inventors: Pengfei Xia, Bin Liu
  • System and Method for Device Random Access in a Beamformed Communications System
    Publication number: 20180368155
    Abstract: A method for communicating with an access node includes receiving measurement table information from the access node, wherein the measurement table information is derived from measurements of communications channels between access nodes and user equipments (UEs) served by the access nodes, determining an access strategy and an associated access parameter for a shared communications channel in accordance with the measurement table information, and transmitting an uplink transmission on the shared communications channel in accordance with the associated access parameter after obtaining access to the shared communications channel.
    Type: Application
    Filed: June 16, 2017
    Publication date: December 20, 2018
    Inventors: Pengfei Xia, Xiaocui Li, Bin Liu, Kai Xu
  • System and Method for Beam Failure Recovery Request Reporting
    Publication number: 20180368124
    Abstract: A method for sending a beam failure recovery request (BFRQ) includes setting a demodulation symbol to a first value to specify a BFRQ signal, encoding the demodulation symbol with a first orthogonal code sequence, thereby producing an encoded first sequence of symbols, and send the encoded first sequence of symbols on a first physical uplink control channel (PUCCH) resource allocated for a first scheduling request (SR) transmission.
    Type: Application
    Filed: January 25, 2018
    Publication date: December 20, 2018
    Inventors: Bin Liu, Pengfei Xia
  • METHODS AND PROCEDURES FOR NON-LINEAR PRECODING BASED MULTIUSER MULTIPLE INPUT MULTIPLE OUTPUT
    Publication number: 20180367191
    Abstract: A station may be used to implement non-linear coding based multiuser multiple-input multiple-output (MU-MIMO). The station may include a processor that may be configured to perform a number of actions. For example, the processor may receive a null packet from an access point (AP). Channel feedback may be generated using the null packet. The channel feedback may be sent to the AP. QR dependent information may be received from the AP. Data may be sent to the AP according to the QR dependent information.
    Type: Application
    Filed: August 27, 2018
    Publication date: December 20, 2018
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Pengfei Xia, Oghenekome Oteri, Nirav B. Shah, Monisha Ghosh, Hanqing Lou, Robert L. Olesen