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).

  • Publication number: 20180310127
    Abstract: A method for user device position determination includes initiating a location determination process, receiving measurement reports originating from at least two user devices, the measurement reports include observed time difference of arrival (OTDOA) measurements associated with at least two access nodes, inter-device measurements (IDMs) among the at least two user devices, and angle information associated with the at least two access nodes, and determining positions of the at least two user devices in accordance with the OTDOA measurements associated with the at least two access nodes, the IDMs, and the angle information associated with the at least two access nodes.
    Type: Application
    Filed: April 25, 2017
    Publication date: October 25, 2018
    Inventors: Pengfei Xia, Bin Liu, Nathan Edward Tenny, Richard Stirling-Gallacher
  • Publication number: 20180288755
    Abstract: When spatial quasi co-location is established between component carriers, beam management, e.g., beam configuration or reference signal configuration, of one component carrier may be performed based at least in part on beam management information of the other. Information specifying that component carriers or reference signals cross component carriers are spatially quasi co-located, or information about a SQCL group including spatially quasi co-located carriers, may be transmitted to a UE, e.g., using broadcast signaling, radio resource control (RRC) signaling, a media access control-control element (MAC-CE), downlink control information (DCI) signaling, or a combination thereof.
    Type: Application
    Filed: December 11, 2017
    Publication date: October 4, 2018
    Inventors: Bin Liu, Pengfei Xia
  • Publication number: 20180287860
    Abstract: A method for operating a user equipment includes monitoring a first set of reference signals of a first reference signal type transmitted by an access node, each reference signal in the first set of reference signals having a quasi-co-located (QCLed) or spatially similar relationship with a different subset of reference signals of a second set of reference signals of a second reference signal type, identifying a second reference signal from the second set of reference signals as a candidate beam, identifying a first reference signal of the first set of reference signals that is QCLed or spatially similar with the second reference signal, and transmitting a preamble sequence on a random access channel resource that is associated with the first reference signal of the first set of reference signals, thereby identifying the candidate beam for communications at the access node.
    Type: Application
    Filed: February 7, 2018
    Publication date: October 4, 2018
    Inventors: Pengfei Xia, Bin Liu
  • Publication number: 20180288756
    Abstract: A method for operating an access node includes generating a configuration message including information specifying a set of reference signals of a first reference signal type and a set of reference signals of a second reference signal type used to identify a new beam, and information specifying random access channel resources allocated for transmitting preamble sequences, wherein each random access channel resource is associated with a reference signal of the first reference signal type, sending, to one or more user equipments (UEs), the configuration message, receiving, from a UE, a preamble sequence on one of the random access channel resources, and determining an identity of the UE in accordance with the preamble sequence and the one of the random access channel resources.
    Type: Application
    Filed: February 7, 2018
    Publication date: October 4, 2018
    Inventors: Pengfei Xia, Bin Liu
  • Publication number: 20180288772
    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: March 28, 2017
    Publication date: October 4, 2018
    Inventors: Bin Liu, Richard Stirling-Gallacher, Pengfei Xia
  • Publication number: 20180287756
    Abstract: An embodiment method defines a demodulation reference signal (DMRS) pattern for transmitting DMRSs for rank 3 or rank 4 transmissions. The DMRS pattern specifies 12 REs in total per physical resource block (PRB) for carrying DMRSs on three or four antenna ports in antenna ports 7-14 for rank 3 or rank 4 transmissions. DMRS settings for transmitting DMRS according to the DMRS pattern may be specified using a downlink control information table.
    Type: Application
    Filed: November 30, 2017
    Publication date: October 4, 2018
    Inventors: Pengfei Xia, Bin Liu
  • Publication number: 20180278308
    Abstract: Systems, methods and instrumentalities are disclosed to enable time domain null-forming. An access point (AP) may be configured to send a channel training request to a station (STA). The AP may be configured to receive a channel training packet in response to the channel training request. The channel training packet may include a legacy long training field (LTF). The AP may estimate the channel. The channel estimation may be computed using the legacy LTF. The AP may compute a null-forming vector using the channel estimation. The AP may use the null-forming vector to precode the entire packet.
    Type: Application
    Filed: October 22, 2015
    Publication date: September 27, 2018
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Yuan Sheng Jin, Fengjun Xi, Pengfei Xia, Nirav B. Shah, Hanqing Lou, Robert L. Olesen, Oghenekome Oteri
  • Publication number: 20180270863
    Abstract: Systems, methods, and instrumentalities are described to implement an interference management method in a WLAN. An access point (AP) or an inter-BSS coordinator (IBC) may identify a station (STA) associated with a first basic service set (BSS) as an edge STA or a non-edge STA The AP or the IBC may group the edge STA into an edge group and a non-edge STA into a non-edge group. The AP or the IBC may receive information associated with a second BSS. The AP or the IBC may coordinate access of the edge group and/or the non-edge group. The access may be coordinated to minimize interference of the edge STA. The access may be based at least on the received information associated with the second BSS The AP or the IBC may adjust transmit power of a plurality of STAs identified as edge group STAs and non-edge group STAs.
    Type: Application
    Filed: May 15, 2018
    Publication date: September 20, 2018
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Oghenekome Oteri, Hanqing Lou, Monisha Ghosh, Robert L. Olesen, Frank La Sita, Xiaofei Wang, Pengfei Xia, Nirav B. Shah
  • Publication number: 20180262247
    Abstract: A system and method for feeding back channel information are provided. A method for communications device operations includes generating feedback information, encoding the feedback information to produce a feedback payload, and transmitting the feedback payload to a communications server serving a communications device. The feedback information includes at least a first long term wideband channel statistics and a second long term wideband channel statistics.
    Type: Application
    Filed: May 14, 2018
    Publication date: September 13, 2018
    Inventors: Pengfei Xia, Qiang Wu, David Jean-Marie Mazzarese, Yongxing Zhou, Yang Tang
  • Publication number: 20180254922
    Abstract: A method for transmitting feedback includes generating explicit channel feedback for a plurality of transmit beam-receive beam combinations (TRBCs) between the user device and a transmit-receive point (TRP), generating a modified resource in accordance with explicit feedback configuration information, the modified resource configured to convey the explicit channel feedback, wherein an explicit channel feedback associated with each TRBC is conveyed on a different data symbol of the modified resource, and transmitting the modified resource to the TRP using a single TRBC.
    Type: Application
    Filed: March 2, 2017
    Publication date: September 6, 2018
    Inventors: Richard Stirling-Gallacher, Bin Liu, Pengfei Xia, Nathan Edward Tenny, Hongcheng Zhuang
  • Patent number: 10063290
    Abstract: A station is used to implement non-linear coding based multiuser multiple-input multiple-output (MU-MIMO). The station includes a processor that may be configured to perform a number of actions. For example, the processor receives a null packet from an access point (AP). Channel feedback is generated using the null packet. The channel feedback is sent to the AP. QR dependent information is received from the AP. Data is sent to the AP according to the QR dependent information.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: August 28, 2018
    Assignee: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Pengfei Xia, Oghenekome Oteri, Nirav B. Shah, Monisha Ghosh, Hanqing Lou, Robert L. Olesen
  • Publication number: 20180234118
    Abstract: Methods, systems, and apparatuses are disclosed for transmitting a plurality of bits to an access point (AP) and receiving constellation symbol from the AP. A constellation symbol may include a plurality of indications of bits. Each indication of the plurality of indications of bits may be associated with a respective wireless transmit/receive unit (WTRU) of a plurality of WTRUs. The plurality of indications of bits may include indications of bits modulated at a multi-user constellation bit division multiple access modulator (MU-CBDMAM).
    Type: Application
    Filed: October 2, 2015
    Publication date: August 16, 2018
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Fengjun Xi, Yuan Sheng Jin, Pengfei Xia, Oghenekome Oteri, Hanqing Lou, Nirav B. Shah, Robert L. Olesen
  • Publication number: 20180227862
    Abstract: A method for beam adaptation in a beam-based communications system is provided. The beam-based communications system includes user equipment (UE) and a transmit-receive point (TRP). The method includes that UE determines a beamforming gain headroom (BHR) based on a UE maximum beamforming gain and a beamforming gain of a UE beam between the UE and the TRP, sends the BHR to the TRP, and receives a beam adaptation indication from the TRP.
    Type: Application
    Filed: October 24, 2017
    Publication date: August 9, 2018
    Applicant: Futurewei Technologies, Inc.
    Inventors: Bin LIU, Pengfei XIA, Aimin Justin SANG, Richard STIRLING-GALLACHER
  • Publication number: 20180227094
    Abstract: A dynamic UE capability message specifying a number of beams to be evaluated within different groups of UE TX beam directions associated with different antenna arrays of a UE may be communicated to a transmit receive point (TRP). Each group of UE TX beam directions may include beam directions that are candidates for uplink data transmission. Based on information in the dynamic UE capability message, the TRP can assign SRS resources (for uplink beam management or uplink channel sounding) and/or schedule a multi-layer MIMO uplink transmission in accordance with a UE capability constraint. This may ensure that the SRS resources assignment and/or scheduled multi-layer MIMO uplink transmission is consistent with the UE's beamforming capabilities.
    Type: Application
    Filed: September 27, 2017
    Publication date: August 9, 2018
    Inventors: Bin Liu, Pengfei Xia
  • Publication number: 20180227957
    Abstract: A method and apparatus for supporting UL MU diversity are provided. The method may comprise transmitting a MU RTS frame to a plurality of STAs, the MU RTS frame comprising a plurality of MCS indicators, a plurality of data stream number indicators, an indication of a spatial technology, and a duration field. The MU RTS frame solicits clear to send (CTS) frame responses from a plurality of STAs and simultaneous UL OFDMA transmissions may be received in accordance with the MCS indicators, the data stream number indicators and the indicated spatial technology. An AP may transmit another frame comprising UL transmission information for transmission of data frames by the plurality of STAs. The AP may receive from the plurality of STAs, the data frames simultaneously and may additionally transmit acknowledgements of the received data frames to the plurality of STAs.
    Type: Application
    Filed: April 9, 2018
    Publication date: August 9, 2018
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Hanqing LOU, Guodong ZHANG, Xiaofei WANG, Juan FANG, Oghenekome OTERI, Pengfei XIA, Monisha GHOSH, Robert L. OLESEN
  • Publication number: 20180227024
    Abstract: A method and system for beam recommendation in communication systems is provided. In an embodiment, a method in a device for adjusting beam parameters at a remote transmitter includes measuring, by the device, device environmental parameters. The method also includes determining, by the device, beam recommendation information according to the device environmental parameters. The method also includes transmitting, by the device, the beam recommendation information to the remote transmitter, wherein the remote transmitter uses the beam recommendation information to adjust the beam width for transmissions to the device.
    Type: Application
    Filed: February 3, 2017
    Publication date: August 9, 2018
    Inventors: Pengfei Xia, Bin Liu, Richard Stirling-Gallacher
  • Publication number: 20180191422
    Abstract: Aspects of this disclosure provide techniques for detecting and recovering from beam-failure events. In some embodiments, motion sensor information generated by motion sensors on a UE is used to detect, predict, and/or recover from a beam failure event that results, or would otherwise result, from movement of the UE. The motion sensor information may be used to adjust a current beam direction used by the UE to transmit or receive a signal, or to determine a recommendation for adjusting a current beam direction of the base station. The motion sensor information may be generated by any sensor that detects a movement of the UE, such as a gyroscope, an accelerometer, a magnetometer, a global positioning system (GPS) sensor, a global navigation satellite system (GNSS) sensor, or any other device that detects a change in position/orientation of the UE.
    Type: Application
    Filed: August 18, 2017
    Publication date: July 5, 2018
    Inventors: Pengfei Xia, Bin Liu, Nathan Edward Tenny
  • Publication number: 20180192375
    Abstract: A method for controlling an uplink signal transmit power at the user equipment and a UE configured to perform such a method are disclosed. In an embodiment, the method includes receiving a downlink reference signal transmit power associated with a first resource indicator, a downlink reference signal transmit beamforming gain associated with a second resource indicator, an uplink signal receive beamforming gain associated with a third resource indicator, and an uplink signal target receive power associated with a fourth resource indicator and transmitting an uplink signal associated with a fifth resource indicator to a transmission point with a transmit power calculated based on the combination, wherein the downlink reference signal transmit power associated with the first resource indicator and the downlink reference signal transmit beamforming gain associated with the second resource indicator are signaled together as a single metric associated with a sixth resource indicator.
    Type: Application
    Filed: November 22, 2017
    Publication date: July 5, 2018
    Inventors: Pengfei Xia, Bin Liu, Richard Stirling-Gallacher
  • Publication number: 20180191418
    Abstract: Embodiments of this disclosure provide techniques for determining a device's beam correspondence status. As used herein, a device is considered to have “beam correspondence” when the device's TX and RX antennas satisfy a calibration criteria. In one example, a device's TX and RX antennas satisfy the calibration criteria when a difference between quality parameters corresponding to reference signals transmitted and received using corresponding TX and RX beams is less than a threshold. In another example, a device's TX and RX antennas satisfy the calibration criteria when a list of indices ranking the device's TX beams matches a list of indices ranking the device's RX beams. The lists of indices may be derived by transmitting and receiving references signals according to the devices RX and TX beams, and then generating list of indices based on quality parameters of the respective RX and TX beams.
    Type: Application
    Filed: December 12, 2017
    Publication date: July 5, 2018
    Inventors: Pengfei Xia, Bin Liu
  • Patent number: 10015821
    Abstract: Systems, methods, and instrumentalities are described to implement an interference management method in a WLAN. An access point (AP) or an inter-BSS coordinator (IBC) may identify a station (STA) associated with a first basic service set (BSS) as an edge STA or a non-edge STA. The AP or the IBC may group the edge STA into an edge group and a non-edge STA into a non-edge group. The AP or the IBC may receive information associated with a second BSS. The AP or the IBC may coordinate access of the edge group and/or the non-edge group. The access may be coordinated to minimize interference of the edge STA. The access may be based at least on the received information associated with the second BSS. The AP or the IBC may adjust transmit power of a plurality of STAs identified as edge group STAs and non-edge group STAs.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: July 3, 2018
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Oghenekome Oteri, Hanqing Lou, Monisha Ghosh, Robert L. Olesen, Frank La Sita, Xiaofei Wang, Pengfei Xia, Nirav B. Shah