Retransmission of MsgB in Two-Step Random Access Procedure

    公开(公告)号:US20240284518A1

    公开(公告)日:2024-08-22

    申请号:US18652003

    申请日:2024-05-01

    Applicant: Apple Inc,

    CPC classification number: H04W74/0833 H04W72/1268 H04W74/006

    Abstract: A wireless user equipment (UE) device may transmit a random access preamble to a base station, using a physical resource on an uplink signal. After failing to receive an initial transmission of a response message from the base station (BS), the UE device may monitor for one or more retransmissions of the response message. Each of the retransmission may include a corresponding transmission number. As an alternative, each of the retransmissions may be at least partially scrambled using a corresponding Radio Network Temporary Identifier (RNTI). As another alternative, a window for monitoring and RNTI calculation may be extended to include the one or more retransmissions. The successive retransmissions may include the same set of UE-specific payloads, or, a decreasing set of payloads over time as UE devices acknowledge successful receipt of their respective payloads.

    Layer 2 UE to UE data forwarding
    173.
    发明授权

    公开(公告)号:US12041526B2

    公开(公告)日:2024-07-16

    申请号:US17593600

    申请日:2020-10-22

    Applicant: APPLE INC.

    CPC classification number: H04W40/02 H04L45/66 H04W76/11 H04W88/04

    Abstract: Systems and methods for using a relay user equipment (UE) to transport data of interest received from a first remote UE to a second remote UE on a UE to UE relay within a wireless communication system are discussed herein. These methods may be performed at Layer 2 of a protocol stack of the wireless communication system. Data packets sent on the UE to UE relay may include an adaptation header including routing information (e.g., Layer 2 addresses, a bearer-specific index, etc.) for the UE to UE relay. An adaptation layer may accordingly be provided within Layer 2 to decode these adaptation headers. In some cases, a per-bearer approach may be used to map between individual direct bearers of a hop by hop path configuration of the UE to UE relay. Embodiments eschewing the adaptation header and instead using logical channel identifiers (LCIDs) to make routing indications are also described.

    DISCONTINUOUS COVERAGE IN NR NTN AND IOT NTN SYSTEMS

    公开(公告)号:US20240032139A1

    公开(公告)日:2024-01-25

    申请号:US17593697

    申请日:2021-08-04

    Applicant: APPLE INC.

    CPC classification number: H04W76/28 H04W52/0225

    Abstract: The functions of user equipment (UE), radio access network (RAN) devices, and core network (CN) devices in circumstances where a UE is expected to experience discontinuous coverage are described herein. A UE may send a CN a non-access stratum (NAS) message including a release request indicating that a UE is leaving coverage and assistance information. The CN may interrupt paging of the UE and resume the paging according to the assistance information. A UE may enter a low power usage mode upon leaving coverage, and may use one or more timers to determine when to check for coverage and send a mobility update message corresponding to the low power usage mode. A base station may receive, from a UE, a radio resource control (RRC) message comprising a release request and assistance information, send an RRC release message to the UE in response, and forward the assistance information to the CN.

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