ENHANCED SIDELINK COLLISION AVOIDANCE BASED ON SENSING OF RECEIVER FEEDBACK

    公开(公告)号:US20250048394A1

    公开(公告)日:2025-02-06

    申请号:US18717471

    申请日:2022-12-07

    Abstract: Systems, methods, and apparatuses for sidelink collision avoidance based on sensing, such as PSFCH sensing, are provided. One method may include sensing, by a first UE, a first sidelink feedback transmission from a second UE in a first PSFCH resource, and determining, based on the first PSFCH resource, a first radio resource in which the second UE received a first data transmission from a third UE. The method may also include sensing a second sidelink feedback transmission from the second UE in a second PSFCH resource, determining, based on the second PSFCH resource, a second radio resource in which the second UE received a second data transmission from the third UE, and determining, based on at least one of the determined first radio resource or second radio resource, a third radio resource in which the second UE is expected to receive a third data transmission from the third UE.

    ADJUSTMENT OF CONTENTION WINDOW FOR LBT

    公开(公告)号:US20250039925A1

    公开(公告)日:2025-01-30

    申请号:US18716008

    申请日:2021-12-14

    Abstract: Example embodiments of the present disclosure relate to adjustment of contention window (CW) for listen before talk (LBT). A device determines a target size of a contention window for listen before talk at least in part based on at least one of a first metric and a second metric. The first metric indicates a level of intra-system activity of one of the plurality of systems. The second metric indicates a level of inter-system activity of the plurality of systems. The at least one of first and second metrics are determined by the device based on one or more messages in a set of resources shared by a plurality of systems. This solution enables the device to adjust the LBT by determining the target size of the contention window. By doing so, the device may determine an appropriate size of the contention window even when HARQ feedback is not available. In this way, a system may be able to coexist fairly with other systems in unlicensed spectrum.

    ASSISTED SL-RTT METHOD SWITCH
    36.
    发明公开

    公开(公告)号:US20240272294A1

    公开(公告)日:2024-08-15

    申请号:US18438934

    申请日:2024-02-12

    CPC classification number: G01S13/765 G01S13/767

    Abstract: Inter-alia, a method e.g. performed by an anchor user device is disclosed comprising:



    receiving a first target sidelink positioning reference signal;
    transmitting a first anchor sidelink positioning reference signal;
    performing a receiver-transmitter time difference measurement based on the first target sidelink positioning reference signal and the first anchor sidelink positioning reference signal;
    transmitting an indication of a suggestion to switch from a first sidelink round-trip time positioning method to a second round-trip time positioning method based on the receiver-transmitter time difference measurement.




    Further, inter-alia a method performed by a target user device is disclosed as well as respective anchor and target user devices.

    CONSISTENT LISTEN BEFORE TALK FAILURE RECOVERY PROCEDURE FOR SIDELINK OPERATION IN UNLICENSED BANDS

    公开(公告)号:US20240163921A1

    公开(公告)日:2024-05-16

    申请号:US18478671

    申请日:2023-09-29

    CPC classification number: H04W74/0808

    Abstract: Systems, methods, apparatuses, and computer program products for detecting consistent listen before talk failure cases and suitably recovering from such failure cases in the implementation of sidelink for unlicensed bands are provided. For example, a method can include monitoring a transmission resource pool in which the apparatus is operating. The transmission resource pool can include resource block sets, each of which can be monitored. The monitoring can be applied to resource block sets for which a prohibit timer is not running or is expired. The monitoring can be performed to detect listen before talk failures of the apparatus for each monitored resource block set of the plurality of resource block sets. The method can also include triggering or declaring a consistent listen before talk failure for the monitored resource block set when the count value of detected failures exceeds a threshold.

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