Resource selection for random access

    公开(公告)号:US12114360B2

    公开(公告)日:2024-10-08

    申请号:US16818796

    申请日:2020-03-13

    CPC classification number: H04W74/0833 H04W56/001

    Abstract: Methods, systems, and devices for wireless communications are described. The described techniques provide for selecting a PRACH occasion (RO) based on downlink quality, access congestion, latency (e.g., time to next available RO), beam correspondence, random access in previous transmissions, or combinations of these factors. The user equipment (UE) may detect access congestion of synchronization signal blocks (SSBs) and select the less congested SSB in the RO selection. The UE may detect the access congestion by receiving a back-off indicator from the base station, detecting a contention resolution failure, or the number or media access control (MAC) subheaders in a random access response. In some cases, the ROs associated with different SSBs have different latencies and the UE may select the earliest available RO.

    DEMODULATION REFERENCE SIGNAL (DMRS) COMBINING FOR SINGLE DMRS CONFIGURATIONS

    公开(公告)号:US20240129087A1

    公开(公告)日:2024-04-18

    申请号:US18046851

    申请日:2022-10-14

    CPC classification number: H04L5/0051 H04W72/1289

    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment may receive signaling that indicates one of a plurality of demodulation reference signal (DMRS) configurations for demodulating a downlink data channel in a slot or subslot. The UE may receive the signaling from a network entity, such as a base station, and the network entity may select the indicated DMRS configuration. The plurality of DMRS configurations may indicate whether DMRS combining is supported across the slot or subslot and a subsequent adjacent slot or subslot, and the plurality of DMRS configurations may include a configuration that is capable of indicating to the UE that a single DMRS is configured in the slot or subslot and is to be combined with a DMRS in a subsequent adjacent slot or subslot to demodulate the downlink data channel.

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