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    SYSTEMS AND METHODS FOR COLLISION RESOLUTION IN A WIFI OFDMA SYSTEM
    6.
    发明申请
    SYSTEMS AND METHODS FOR COLLISION RESOLUTION IN A WIFI OFDMA SYSTEM 有权

    公开(公告)号：US20220330344A1

    公开(公告)日：2022-10-13

    申请号：US17608789

    申请日：2020-05-04

    申请人： INTERDIGITAL PATENT HOLDINGS, INC.

    发明人： Hanqing Lou ,  Alphan Sahin ,  Li Hsiang Sun ,  Xiaofei Wang ,  Rui Yang ,  Frank La Sita

    IPC分类号： H04W74/08 ,  H04L5/00 ,  H04L27/26 ,  H04L1/18

    摘要： Methods and system may be used for collision detection for orthogonal frequency division multiple access (OFDMA)-based random access. A wireless transmit/receive unit (WTRU) may receive, from an access point (AP), a first trigger frame triggering random access using OFDMA. The WTRU may transmit, to the AP, in response to the first trigger frame a trigger-based frame including user specific control information in a signal (SIG) field. The WTRU may receive an acknowledgment/negative acknowledgment (ACK/NAK) message indicating that the trigger-based frame was successfully detected at the AP or that the trigger-based frame was not successfully detected at the AP. The WTRU receive, from the AP, a scheduling retransmission frame including rescheduling information for STAs with corrupted UL transmissions. On a condition that the scheduling retransmission frame indicates that a collision of the trigger-based frame was detected, the WTRU may retransmit the trigger-based frame

    METHODS FOR SUPPORTING BSS EDGE USER TRANSMISSIONS
    7.
    发明申请
    METHODS FOR SUPPORTING BSS EDGE USER TRANSMISSIONS 有权

    公开(公告)号：US20220217770A1

    公开(公告)日：2022-07-07

    申请号：US17610343

    申请日：2020-05-08

    申请人： INTERDIGITAL PATENT HOLDINGS, INC.

    发明人： Li Hsiang Sun ,  Hanqing Lou ,  Alphan Sahin ,  Xiaofei Wang ,  Rui Yang ,  Frank La Sita

    IPC分类号： H04W74/00 ,  H04W74/08 ,  H04W72/04 ,  H04W72/10 ,  H04B17/318

    摘要： Methods and apparatuses for enhancing random access procedures are described herein. A method performed by an access point (AP) may comprise allocating a plurality of random access (RA) resource units (RA-RUs) for transmitting a message from a station (STA) to the AP over an upper or lower frequency band. The method may comprise transmitting, to a station (STA), one or more physical layer convergence procedure (PLCP) protocol data unit (PPDU) over the upper or lower frequency bands. Each of the one or more PPDUs may include a trigger frame, and the trigger frame may include an indication of the plurality of RA-RUs and a target received signal strength indicator (TRSSI) associated with at least one of the upper or lower frequency bands. The method may comprise receiving, in response to the trigger frame, the message from the STA in one of the plurality of RA-RUs.

    Clear channel assessment (CCA) threshold adaptation method
    10.
    发明授权
    Clear channel assessment (CCA) threshold adaptation method 有权

    公开(公告)号：US11026187B2

    公开(公告)日：2021-06-01

    申请号：US16820986

    申请日：2020-03-17

    申请人： InterDigital Patent Holdings, Inc.

    发明人： Oghenekome Oteri ,  Pengfei Xia ,  Xiaofei Wang ,  Hanqing Lou ,  Monisha Ghosh ,  Robert L Olesen ,  Nirav B. Shah ,  Frank La Sita

    IPC分类号： H04W52/24 ,  H04W74/08 ,  H04W84/12 ,  H04W52/12

    摘要： 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.