Patents by Inventor Fengjun Xi

Fengjun Xi 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: 11924927
    Abstract: A method and apparatus for performing sidelink communications in a wireless transmit receive unit (WTRU) using Long Term Evolution (LTE) and New Radio (NR) technologies is described herein. A WTRU receives downlink control information (DCI) on a physical downlink control channel (PDCCH) from a gNodeB (gNB), wherein the DCI is associated with a cyclic redundancy check (CRC). The a determination is made as to whether the DCI is for an LTE or NR technology sidelink transmission. On a condition that the DCI is for NR technology, the WTRU determines which transmit modulation and coding scheme (MCS) table to apply based on the masking of at least some of the bits in the CRC. Then the WTRU transmits sidelink data on resources indicated by the DCI using the determined MCS table. The WTRU may also receive HARQ feedback on resources indicated by the DCI for HARQ feedback.
    Type: Grant
    Filed: May 10, 2021
    Date of Patent: March 5, 2024
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Kyle Jung-Lin Pan, Fengjun Xi, Chunxuan Ye
  • Patent number: 11916680
    Abstract: A WTRU may select sidelink unicast or groupcast to transmit data. If the WTRU selects sidelink unicast, the WTRU may select to use HARQ ACK/NACK feedback for the transmission. If the WTRU selects sidelink groupcast, either HARQ NACK or HARQ ACK/NACK may be selected depending upon one or more factors. The WTRU may select HARQ NACK or HARQ ACK/NACK depending upon one or more of: a number of WTRUs to receive the data; a condition of a channel associated with transmission; or a quality of service associated with transmission. The WTRU may select a first or second PSFCH format for feedback based upon one or more factors. The WTRU may select a first or second PSFCH format based upon one or more of: the selected sidelink unicast or groupcast; the selected HARQ NACK or HARQ ACK/NACK feedback; or a quality of service associated with the transmission.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: February 27, 2024
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Chunxuan Ye, Fengjun Xi, Kyle Jung-Lin Pan
  • Publication number: 20240057149
    Abstract: Methods, systems, and devices for addressing collisions of possible random access channel (RACH) occasions. A wireless transmit receive unit (WTRU) may receive an indication of semi-static UL/DL information including configuration of RACH occasions in a remaining minimum system information (RMSI) and an indication of one or more actually transmitted synchronization signal (SS) blocks. The WTRU may then assess whether there are RACH occasions based on the configuration information and determine whether any of the RACH occasions are valid, wherein the RACH occasion may be valid based on Based on the RACH occasion is after all actually transmitted SS blocks indicated and/or whether an SS block override is disabled or enabled. The WTRU may transmit a RACH in one or more of the RACH occasions that have been determined to be valid.
    Type: Application
    Filed: October 25, 2023
    Publication date: February 15, 2024
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Kyle Jung-Lin Pan, Fengjun Xi, Chunxuan Ye
  • Publication number: 20240057040
    Abstract: ePDCCH may be provided. For example, a WTRU may receive a configuration for monitoring an ePDCCH resource. Based on the configuration, the WTRU may be configured to monitor and may monitor the ePDCCH resource on a particular subframe. Additionally, a WTRU may derive an aggregation level for a subframe associated with an aggregation level number NAL. The WTRU may transmit or monitor an ePDCCH using the aggregation level associated with the NAL for the subframe. A WTRU may also receive a reference signal. The WTRU may then determine the type of reference signal received. The WTRU may perform a demodulation of the PDSCH or ePDCCH using a demodulation timing based on the determined type. The ePDCCH or PDSCH may also be monitored or received by identifying a demodulation reference timing implicitly based on a location of one or more ePDCCH resources where the WTRU may receive DCI.
    Type: Application
    Filed: October 13, 2023
    Publication date: February 15, 2024
    Inventors: Moon-il Lee, Chang-Soo Koo, Sung-Hyuk Shin, Janet A. Stern-Berkowitz, Marian Rudolf, Fengjun Xi, Ananth Kini, Seyed Mohsen Hosseinian, Paul Marinier
  • Publication number: 20240048296
    Abstract: Systems, methods, and instrumentalities are disclosed for physical (PHY) layer multiplexing of different types of traffic in 5G systems. A device may receive a communication. The communication may include a first traffic type. The device may monitor the communication for an indication that the communication includes a second traffic type that is multiplexed with and/or punctures the first traffic type. An indicator received in the communication and detected by the monitoring may indicate where the second traffic type is located in the communication. The first traffic type and the second traffic type may be multiplexed at a resource element (RE) level. For example, a first traffic type may be punctured by a second traffic type at the RE level. The device may decode one or more of the first or second traffic types in the communication based on the indication.
    Type: Application
    Filed: August 15, 2023
    Publication date: February 8, 2024
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Erdem Bala, Alphan Sahin, Moon-il Lee, Mihaela C. Beluri, Rui Yang, Janet A. Stern-Berkowitz, Fengjun Xi, Afshin Haghighat
  • Publication number: 20240048272
    Abstract: A method may comprise receiving a first signal comprising first LDPC bits including systematic bits and parity bits and transmitting information indicating that the first signal was incorrectly received. A second signal comprising second LDPC bits may be received in response to the transmitting. The second signal may include LDPC bits according to a lifting size of an LDPC base graph.
    Type: Application
    Filed: October 9, 2023
    Publication date: February 8, 2024
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Chunxuan Ye, Nirav B. Shah, Fengjun Xi, Kyle Jung-Lin Pan
  • Patent number: 11888663
    Abstract: Mechanisms may be used for aggregating acknowledgement (ACK), block ACK (BA) and/or short packets transmissions for multi-user (MU) wireless communication systems. Aggregation mechanisms may be used for uplink (UL) and/or downlink (DL) orthogonal frequency division multiple access (OFDMA), and/or UL/DL multiple-user multiple input multiple output (MU-MIMO) transmissions, for example. Multi-user short packets may be aggregated and/or simultaneously transmitted for DL, UL, or peer-to-peer (P2P) transmissions.
    Type: Grant
    Filed: August 2, 2022
    Date of Patent: January 30, 2024
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Fengjun Xi, Hanging Lou, Oghenekome Oteri, Nirav B. Shah, Robert L. Olesen, Yuan Sheng Jin, Pengfei Xia, Frank La Sita, Guodong Zhang
  • Publication number: 20240031064
    Abstract: Methods, apparatus, systems, architectures and interfaces for compressing hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback bits performed by a wireless transmit/receive unit (WTRU) receiving a transmit block (TB) including code block group (CBG) data are provided. The method includes receiving, by the WTRU, information associated with transmitting compressed HARQ-ACK feedback information, receiving, by the WTRU, a TB; determining, by the WTRU, a countdown downlink assignment index (CD_DAI) associated with the received TB; generating, by the WTRU, the compressed HARQ-ACK feedback information by compressing HARQ-ACK feedback bits associated with the received TB; and on condition that: (1) the CD_DAI is equal to zero or (2) the WTRU determines to provide feedback information, transmitting the compressed HARQ-ACK feedback information.
    Type: Application
    Filed: September 29, 2023
    Publication date: January 25, 2024
    Inventors: Hanqing Lou, Chunxuan Ye, Fengjun Xi, Kyle Pan
  • Publication number: 20240023004
    Abstract: A method and apparatus for use in a base station for transmitting information blocks is disclosed. A base station transmits a plurality of beams to a wireless transmit receive unit (WTRU). Further, the base station transmits broadcast information, using a beam of the plurality of beams, the transmitted broadcast information including a first information block and a second information block. Responsive to information in the transmitted second information block, the base station may receive a random access preamble. After the reception of the random access preamble, the base station may transmit a random access response. Responsive to information in the transmitted random access response, the base station may receive a message including control information indicating additional information blocks that the WTRU is requesting to receive. After reception of the received message, the base station may transmit the additional information blocks.
    Type: Application
    Filed: September 29, 2023
    Publication date: January 18, 2024
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Kyle Jung-Lin Pan, Fengjun Xi, Chunxuan Ye, Moon-il Lee
  • Patent number: 11871384
    Abstract: A wireless transmit/receive unit (WTRU) may receive, from a base station, a synchronization signal/physical broadcast channel (SS/PBCH) block transmission. The WTRU may transmit using a physical random access channel (PRACH) resource. Further, the PRACH resource may be determined based on an SS/PBCH block index. Also, the SS/PBCH block index may be determined based on information associated with the SS/PBCH block transmission. In a further example, the information associated with the PBCH block may be derived from a demodulation reference signal (DMRS) sequence. In another example, the DMRS sequence may be a PBCH DMRS sequence. Also, the information associated with the PBCH block may be derived from PBCH payload bits. Further, the SS/PBCH block index may be associated with a beam. In addition, SS/PBCH transmissions of different beams may be transmitted at different times. Further, the PRACH resource may include a preamble resource, a time resource and a frequency resource.
    Type: Grant
    Filed: February 24, 2022
    Date of Patent: January 9, 2024
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Kyle Jung-Lin Pan, Janet A. Stern-Berkowitz, Moon-il Lee, Fengjun Xi
  • Publication number: 20230422297
    Abstract: Methods and apparatus are described. A station includes a transceiver and a processor, which receive a trigger frame for an uplink (UL) transmission. The trigger frame includes an indication of resource units (RUs) for random access in an upcoming UL high efficiency trigger based packet data convergence protocol data unit and an indication that the trigger frame is a poll for a buffer status report of the STA. The processor and the transceiver transmit a buffer status of the STA using a selected one of the indicated RUs.
    Type: Application
    Filed: September 8, 2023
    Publication date: December 28, 2023
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Hanqing Lou, Guodong Zhang, Li-Hsiang Sun, Oghenekome Oteri, Robert L. Olesen, Fengjun Xi, Rui Yang, Xiaofei Wang
  • Publication number: 20230412344
    Abstract: Systems, methods, and instrumentalities are disclosed for range extension, basic service set (B SS) color labeling, and multi-user (MU) fragmentation and control in WLANs. A range extension notification/enablement scheme, a clear channel assessment (CCA), a headroom indication, and/or power scaling may be provided for a range extension mode. BSS color may be provided for multiple-BSSs under an access point (AP). Uplink (UL) transmission may be provided with different fragmentation capabilities. A high-efficiency (HE) trigger-based UL NDP physical layer convergence protocol (PLCP) protocol data unit (PPDU) frame may be provided. A station (STA) may receive a trigger frame comprising a null data packet (NDP) indication and a trigger type. The STA may determine that the STA is an intended recipient of the trigger frame. The STA may prepare an NDP PPDU for a control frame and/or a management frame based on the trigger type.
    Type: Application
    Filed: April 24, 2023
    Publication date: December 21, 2023
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Oghenekome OTERI, Hanqing LOU, Frank LA SITA, Fengjun XI
  • Patent number: 11844105
    Abstract: Methods, systems, and devices for addressing collisions of possible random access channel (RACH) occasions. A wireless transmit receive unit (WTRU) may receive an indication of semi-static UL/DL information including configuration of RACH occasions in a remaining minimum system information (RMSI) and an indication of one or more actually transmitted synchronization signal (SS) blocks. The WTRU may then assess whether there are RACH occasions based on the configuration information and determine whether any of the RACH occasions are valid, wherein the RACH occasion may be valid based on Based on the RACH occasion is after all actually transmitted SS blocks indicated and/or whether an SS block override is disabled or enabled. The WTRU may transmit a RACH in one or more of the RACH occasions that have been determined to be valid.
    Type: Grant
    Filed: June 21, 2022
    Date of Patent: December 12, 2023
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Kyle Jung-Lin Pan, Fengjun Xi, Chunxuan Ye
  • Publication number: 20230396361
    Abstract: Systems, methods, and instrumentalities are disclosed for error check-based synchronization. Physical Broadcast Channel (PBCH) data may be determined. A scrambling (e.g., a first scrambling) of the PBCH data may be scrambled via a sequence (e.g., a first sequence). The first sequence may be based on a cell ID and/or timing information. Error check bits may be attached to the scrambled PBCH data and to the timing information. The error check bits may include one or more cyclic redundancy check (CRC) bits. The scrambled PBCH data, the timing information (e.g., the unscrambled timing information), and/or the attached error check bits may be polar encoded. The polar encoding may result in polar encoded bits. A scrambling (e.g., a second scrambling) of the polar encoded bits may be scrambled via a sequence (e.g., a second sequence). The first sequence and the second sequence may be different. The polar encoded bits may be transmitted.
    Type: Application
    Filed: August 22, 2023
    Publication date: December 7, 2023
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Kyle Jung-Lin Pan, Fengjun Xi
  • Patent number: 11838161
    Abstract: Methods, apparatuses, and systems to enable a channel estimation of more than one channel for Multi-Input Multi-Output (MIMO) communications in a wireless network is provided. The method includes determining a first set of complex numbers comprising first channel estimation signal associated with a first channel, determining a second set of complex numbers comprising second channel estimation signal associated with a second channel, and transmitting the first set of complex numbers and the second set of complex numbers via a physical layer (PHY) frame, wherein the second set of complex numbers are complex conjugates of the first set of complex numbers.
    Type: Grant
    Filed: June 14, 2021
    Date of Patent: December 5, 2023
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Alphan Sahin, Rui Yang, Hanqing Lou, Oghenekome Oteri, Robert Olesen, Fengjun Xi
  • Patent number: 11817956
    Abstract: Methods, apparatus, systems, architectures and interfaces for compressing hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback bits performed by a wireless transmit/receive unit (WTRU) receiving a transmit block (TB) including code block group (CBG) data are provided. The method includes receiving, by the WTRU, information associated with transmitting compressed HARQ-ACK feedback information, receiving, by the WTRU, a TB; determining, by the WTRU, a countdown downlink assignment index (CD_DAI) associated with the received TB; generating, by the WTRU, the compressed HARQ-ACK feedback information by compressing HARQ-ACK feedback bits associated with the received TB; and on condition that: (1) the CD_DAI is equal to zero or (2) the WTRU determines to provide feedback information, transmitting the compressed HARQ-ACK feedback information.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: November 14, 2023
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Hanging Lou, Chunxuan Ye, Fengjun Xi, Kyle Jung-Lin Pan
  • Publication number: 20230362968
    Abstract: A wireless transmit/receive unit (WTRU) may receive a first downlink control information (DCI) in a first slot. The first DCI may include an indication of a first quasi co-location (QCL) reference. The WTRU may receive a second DCI in a second slot. The second DCI may include scheduling information for a first physical downlink shared channel (PDSCH) transmission. The WTRU may receive the first PDSCH transmission in accordance with the first QCL reference indicated by the first DCI received in the first slot and in accordance with the scheduling information for the first PDSCH transmission included in the second DCI received in the second slot.
    Type: Application
    Filed: June 30, 2023
    Publication date: November 9, 2023
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Fengjun Xi, Wei Chen, Kyle Jung-Lin Pan, Moon-il Lee, Chunxuan Ye
  • Publication number: 20230344469
    Abstract: Methods and apparatus for beam management are disclosed. A WTRU may include a plurality of antenna panels, each antenna panel comprising a plurality of antennas configured to transmit on directional transmit (TX) beams. The WTRU may send, to a transmission reception point (TRP), antenna panel capability information for the plurality of antenna panels and receive a reference signal (RS) configuration for configuring RS resource sets. The WTRU may send an RS transmission trigger frame identifying triggered RS resource sets from the configured RS resource sets. The WTRU may identify a set of antenna panels to be used with the triggered RS resource sets. The WTRU may determine an UL TX beam sweeping mode and an association between the triggered RS resources sets and the set of antenna panels. The WTRU may perform UL beam sweeping using the triggered RS resource sets and associated set of antenna panels.
    Type: Application
    Filed: May 1, 2023
    Publication date: October 26, 2023
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Wei Chen, Fengjun Xi, Kyle Jung-Lin Pan
  • Publication number: 20230344701
    Abstract: Systems, methods and instrumentalities are disclosed for WTRU-initiated beam recovery including beam switching and/or beam sweeping. A WTRU may be configured to detect a beam failure condition, identify a candidate beam for resolving the beam failure condition, and send a beam failure recovery request to a network entity. The WTRU may include the candidate beam in the beam failure recovery request and may receive a response from the network entity regarding the request and/or a solution for the beam failure condition. WTRU-initiated beam recovery may be used to resolve radio link failures and improve system performance by avoiding the necessity to perform an acquisition procedure. Additionally, beam sweeping may be performed at a sub-time unit level to provide a fast sweeping mechanism.
    Type: Application
    Filed: June 28, 2023
    Publication date: October 26, 2023
    Applicant: Sony Group Corporation
    Inventors: Kyle Jung-Lin PAN, Fengjun XI, Afshin HAGHIGHAT, Moon-il LEE
  • Patent number: 11800436
    Abstract: A method and apparatus for use in a wireless transmit receive unit (WTRU) for receiving and transmitting information blocks is disclosed. A WTRU receives transmitted broadcast information, the transmitted broadcast information including a first information block and a second information block. Based on information in the received second information block, the WTRU transmits a random access preamble. After the transmission of the random access preamble, the WTRU may receive a random access response. Based on information in the received random access response, the WTRU may transmit a message including control information indicating additional information blocks that the WTRU is requesting to receive. After transmission of the transmitted message, the WTRU may receive the additional information blocks. In an example, the transmitted broadcast information may be periodically transmitted broadcast information.
    Type: Grant
    Filed: November 29, 2021
    Date of Patent: October 24, 2023
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Kyle Jung-Lin Pan, Fengjun Xi, Chunxuan Ye, Moon-il Lee