Directional sidelink (SL) beam failure detection

    公开(公告)号:US11924902B2

    公开(公告)日:2024-03-05

    申请号:US17336118

    申请日:2021-06-01

    CPC classification number: H04W76/18 H04L5/0048 H04W24/04

    Abstract: A method of wireless communication, by a first sidelink user equipment (UE), includes periodically receiving a set of sidelink beam failure detection reference signals (RSs) from a second sidelink UE. The method includes incrementing a beam failure detection (BFD) counter in response to one or more reference signals of the set of sidelink beam failure detection RSs having a received signal strength below a threshold. The first sidelink UE starts a beam failure detection timer in response to the reference signal(s) of the set of sidelink beam failure detection reference signals having the received signal strength below the threshold. Another method by a sidelink UE may periodically transmit a set of sidelink BFD RSs to another sidelink UE. The set of sidelink BFD RSs comprise one or more sidelink receive RSs. The sidelink UE configures the other sidelink UE with the sidelink receive BFD RSs.

    Adaptive demodulation reference signal density for physical downlink control channel

    公开(公告)号:US11924828B2

    公开(公告)日:2024-03-05

    申请号:US17370858

    申请日:2021-07-08

    CPC classification number: H04W72/1273

    Abstract: A user equipment may receive a configuration that indicates a density of demodulation reference signal (DMRS) resource elements and a set of locations of the DMRS resource elements in one or more resource element groups associated with a physical downlink control channel (PDCCH); receive an indication of a change to at least one of the density of the DMRS resource elements or the set of locations of the DMRS resource elements, resulting in at least one of a modified density of the DMRS resource elements or a modified set of locations of the DMRS resource elements; and monitor for downlink control information in a search space associated with the PDCCH based at least in part on the at least one of the modified density of the DMRS resource elements or the modified set of locations of the DMRS resource elements.

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