EFFICIENT SIDELINK RESOURCE RESERVATION

    公开(公告)号:US20240381382A1

    公开(公告)日:2024-11-14

    申请号:US18690224

    申请日:2021-12-01

    Abstract: Aspects relate to techniques for efficient sidelink resource reservation based on the congestion on a sidelink. A wireless communication device may transmit control information indicating a number of resources reserved for an initial transmission and at least one retransmission of a packet. In some examples, the number of resources included in the control information can be either three resources or two resources based on the congestion. For example, the number of resources included in the control information can be three resources in response to a congestion value representing the congestion on the sidelink being less than a threshold. In addition, the number of resources included in the control information can be two resources in response to the congestion value being greater than or equal to the threshold.

    LATENCY TRIGGERED SIDELINK RESOURCE RESELECTION

    公开(公告)号:US20240163910A1

    公开(公告)日:2024-05-16

    申请号:US18548430

    申请日:2021-04-14

    CPC classification number: H04W72/40 H04L5/0078 H04W72/54

    Abstract: Certain aspects of the present disclosure provide techniques for sidelink communications. A method that may be performed by a user equipment (UE) includes monitoring a latency between a packet arrival time from an upper layer at the UE and an over-the-air (OTA) packet transmission time. The latency is based at least in part on, a first number of subframes reserved for a sidelink synchronization signal (SLSS) and/or a second number of subframes reserved based on a configured subframe bitmap. The method includes triggering a transmit resource selection at the UE when the latency exceeds a threshold latency.

    TIME SYNCHRONIZATION OPERATION IN VEHICLE COMMUNICATION

    公开(公告)号:US20230247573A1

    公开(公告)日:2023-08-03

    申请号:US17906892

    申请日:2020-05-08

    CPC classification number: H04W56/0015 G04R20/02

    Abstract: Methods and systems for performing time synchronization for a Cellular Vehicle-to-Everything (C-V2X) wireless interface of a vehicle are provided. In one example, a method comprises: determining, by a vehicle UE, whether a Global Navigation Satellite System (GNSS) receiver of the vehicle receives a GNSS signal including time information for a time synchronization operation for the vehicle's local clock source; based on whether the GNSS receiver receives a GNSS signal including the time information, adjusting a local clock time of the vehicle's local clock source based on one of: the time information included in the GNSS signal, or one or more wireless signals broadcasted from a base station; and adjusting, based on the adjusted local clock time, at least one of: a phase or a frequency of a clock signal supplied to the C-V2X wireless interface.

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