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    HANDOVER WITHOUT SECONDARY CELL GROUP (SCG) CHANGE
    21.
    发明申请
    HANDOVER WITHOUT SECONDARY CELL GROUP (SCG) CHANGE 审中-公开

    公开(公告)号：WO2023044825A1

    公开(公告)日：2023-03-30

    申请号：PCT/CN2021/120494

    申请日：2021-09-24

    Applicant: APPLE INC. ,  HU, Haijing

    Inventor： SIROTKIN, Alexander ,  PALLE VENKATA, Naveen Kumar R. ,  NUGGEHALLI, Pavan ,  VANGALA, Sarma V. ,  CHEN, Yuqin ,  WU, Zhibin ,  GURUMOORTHY, Sethuraman ,  XU, Fangli ,  ROSSBACH, Ralf

    IPC: H04W36/00

    Abstract: Methods, systems, apparatuses, and computer programs for enhancing UE handover. In one aspect, the method can include obtaining a request for a handover event from a UE, wherein the request includes at least (i) a request for access to a primary cell group and (ii) data indicating capabilities of the UE, determining, based on the UE capabilities, that the UE is capable of maintaining communication with a secondary cell group of a base station during handover of the UE to the primary cell group of the first base station, generating based on the determined UE capability, a handover command that instructs the UE to maintain communication with the secondary cell group of the base station during handover of the UE to the primary cell group, encoding the generated handover command for transmission to the UE, and transmitting the generated handover command to the UE.

    CONDITIONAL HANDOVERS FOR NON-TERRESTRIAL NETWORKS
    24.
    发明申请
    CONDITIONAL HANDOVERS FOR NON-TERRESTRIAL NETWORKS 审中-公开

    公开(公告)号：WO2023010312A1

    公开(公告)日：2023-02-09

    申请号：PCT/CN2021/110457

    申请日：2021-08-04

    Applicant: APPLE INC. ,  XU, Fangli

    Inventor： VANGALA, Sarma V. ,  SIROTKIN, Alexander ,  XU, Fangli ,  HU, Haijing ,  PALLE VENKATA, Naveen Kumar R. ,  NUGGEHALLI, Pavan ,  CHEN, Yuqin ,  WU, Zhibin ,  GURUMOORTHY, Sethuraman ,  ROSSBACH, Ralf

    IPC: H04W36/30

    Abstract: A UE may perform a location-based conditional handover (CHO) based on a region information and size parameter associated with a serving cell of a non-terrestrial network (NTN). In time-based CHO, the UE may perform CHO in response to expiration of a network-configured wait time. Alternatively, the UE may perform CHO by randomly selecting a wait time from a network configured time range. The selection may be randomized using a network provided seed or using a cell Radio Network Temporary Identifier (RNTI) value. In elevation-based CHO, the UE may perform CHO in response to the elevation angle of a satellite being less than a network configured threshold. When the UE is configured with multiple cells of the NTN, and the CHO criteria for two or more of the cells are satisfied, the UE may select a target cell for CHO based on network indicated prioritization of the cells.

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