Method and apparatus for sidelink discontinuous reception in a wireless communication system

    公开(公告)号:US11937334B2

    公开(公告)日:2024-03-19

    申请号:US18119179

    申请日:2023-03-08

    CPC classification number: H04W76/28 H04W72/0446 H04W72/1263 H04W72/20

    Abstract: Methods, systems, and apparatuses for Sidelink Discontinuous Reception (SL DRX) in a wireless communication system to avoid ambiguity on slot offset calculations on SL DRX. A method for a UE comprises performing a SL communication associated with a destination Identity (ID), having a SL DRX configuration associated with the SL communication, wherein the SL DRX configuration comprises at least an on-duration timer and a DRX cycle, deriving a first offset associated with the SL communication based on the destination ID and the DRX cycle, deriving a second offset associated with the SL communication based on the destination ID and a number of slots per subframe, starting the on-duration timer after a time period determined based on the second offset from the beginning of a subframe, wherein the subframe is determined based on at least the first offset, and monitoring Sidelink Control Information (SCI) when the on-duration timer is running.

    Method and apparatus of handling partial sensing and discontinuous reception for sidelink communication in a wireless communication system

    公开(公告)号:US11924876B2

    公开(公告)日:2024-03-05

    申请号:US17573072

    申请日:2022-01-11

    CPC classification number: H04W74/0808 H04W72/56

    Abstract: Methods and apparatuses for handling partial sensing and discontinuous reception for sidelink communication to reduce potential latency due to additional sensing and to improve resource utilization efficiency. Various embodiments can comprise a first device performing sidelink communication to at least a second device, or a second device in a sidelink resource pool, and triggering to perform resource selection for a sidelink data at a timing, wherein the first device (already) receives or monitors sidelink control information for a (contiguous) time duration before the timing. The first device can perform sensing for a contiguous sensing duration after the timing, determine or select a first sidelink resource from a set of sidelink resources, and perform a first sidelink transmission on the first sidelink resource for transmitting the sidelink data to the second device.

    Method and apparatus for handling device-to-device feedback in a wireless communication system

    公开(公告)号:US11695516B2

    公开(公告)日:2023-07-04

    申请号:US17012437

    申请日:2020-09-04

    CPC classification number: H04L1/1812 H04W64/00 H04W72/121 H04W72/20 H04W92/18

    Abstract: In an example, a second UE receives a first SCI and a second SCI from a first UE in a first slot. A groupcast sidelink transmission is scheduled by the first SCI and the second SCI. The second SCI indicates a location indication, associated with a location of the first UE, and a communication range. A PSFCH resource is determined based upon the first SCI. The second UE doesn't transmit a NACK indication on the PSFCH resource if location information of the second UE is available, the groupcast sidelink transmission isn't successfully decoded, and the second UE is outside the communication range. The second UE transmits the NACK indication on the PSFCH resource if the location information isn't available and the groupcast sidelink transmission isn't successfully decoded, or if the location information is available, the groupcast sidelink transmission isn't successfully decoded, and the second UE is within the communication range.

    METHOD AND APPARATUS FOR DERIVING DOWNLINK PATHLOSS FOR DEVICE-TO-DEVICE TRANSMIT POWER CONTROL IN A WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20230027887A1

    公开(公告)日:2023-01-26

    申请号:US17947508

    申请日:2022-09-19

    Abstract: A method and apparatus are disclosed from the perspective of a device to perform sidelink transmission. The method includes the device being in RRC (Radio Resource Control)-connected mode in Uu link. The method also includes the device being configured to use at least DL (Downlink) pathloss for sidelink power control. The method further includes the device deriving a first DL pathloss value for determining an uplink transmit power of one specific kind of uplink transmission. In addition, the method includes the device determining or deriving a sidelink transmit power based on the first DL pathloss value. Furthermore, the method includes the device performing a sidelink transmission to other device(s) with the sidelink transmit power.

    METHOD AND APPARATUS FOR HANDLING DEVICE-TO-DEVICE FEEDBACK TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20220217680A1

    公开(公告)日:2022-07-07

    申请号:US17696241

    申请日:2022-03-16

    Abstract: Methods and apparatuses for handling device-to-device feedback transmission in a wireless communication system are disclosed herein. In one method, a first device receives a configuration for operating in a network scheduling mode for acquiring sidelink resources. The first device receives a sidelink control information with a report request from a second device. The first device triggers or is triggered to transmit a report to the second device in response to the report request. If the first device has no available sidelink resource for transmitting the report, the first device triggers a scheduling request. The first device transmits a signaling of the scheduling request to the network. The first device receives a sidelink grant from the network. The first device utilizes sidelink resource(s) indicated by the sidelink grant to transmit the report to the second device.

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