Timing and synchronization parameters for handover in non-terrestrial network

    公开(公告)号:US12262264B2

    公开(公告)日:2025-03-25

    申请号:US17901673

    申请日:2022-09-01

    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a source base station, configuration information for a handover, wherein the configuration information indicates, for a target non-terrestrial cell, timing and synchronization parameters including a scheduling timing offset, a round trip time between a reference point and a target base station associated with the target non-terrestrial cell, satellite ephemeris information, an ephemeris validity duration associated with the satellite ephemeris information, common timing advance parameters, and a common timing advance validity duration associated with the common timing advance parameters. The UE may perform the handover with the target base station associated with the target non-terrestrial cell based at least in part on the timing and synchronization parameters for the target non-terrestrial cell. Numerous other aspects are described.

    Intra-satellite handover
    7.
    发明授权

    公开(公告)号:US12081316B2

    公开(公告)日:2024-09-03

    申请号:US16059585

    申请日:2018-08-09

    CPC classification number: H04B7/18541 H04W74/006 H04W76/11 H04W76/27 H04W84/06

    Abstract: Methods, systems, and devices for wireless communications are described that support techniques for intra-satellite handover. The described techniques provide for handovers such that a user equipment (UE) may transition from communications with a satellite via a first frequency (or set of frequencies) to communications with the same satellite via a second frequency (or set of frequencies). A UE may determine relevant timing and/or configuration for the second frequency (or set of frequencies) prior to transitioning from communications via the first frequency (or set of frequencies). Thus, the UE may efficiently begin communications at a second frequency (or set of frequencies) that are different than the first frequency (or set of frequencies)—for example, without performing a random access procedure.

    Random access for a non-terrestrial network

    公开(公告)号:US12016050B2

    公开(公告)日:2024-06-18

    申请号:US18056365

    申请日:2022-11-17

    CPC classification number: H04W74/006 H04W74/0833

    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive information that indicates whether to perform a first random access channel (RACH) procedure for a non-terrestrial network or a second RACH procedure for a terrestrial network, wherein the first RACH procedure is configured to support a larger number of UEs contemporaneously performing a RACH procedure than the second RACH procedure. Responsive to the information indicating that the UE is to perform the first RACH procedure, the UE may perform the first RACH procedure. Numerous other aspects are provided.

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