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    MANAGING COEXISTENCE OF USER EQUIPMENT-BASED AND RANDOM ACCESS CHANNEL-BASED TIMING ADVANCE VALUES
    24.
    发明申请
    MANAGING COEXISTENCE OF USER EQUIPMENT-BASED AND RANDOM ACCESS CHANNEL-BASED TIMING ADVANCE VALUES 有权

    公开(公告)号：US20250126635A1

    公开(公告)日：2025-04-17

    申请号：US18911617

    申请日：2024-10-10

    Applicant: Nokia Technologies Oy

    Inventor： Umur KARABULUT ,  Anastasios KAKKAVAS ,  Sanjay GOYAL ,  Ali KARIMIDEHKORDI ,  Panagiotis SPAPIS

    IPC: H04W74/00 ,  H04W48/20 ,  H04W72/02 ,  H04W72/044 ,  H04W72/23

    Abstract: A method is provided that includes receiving a configuration of selection criteria for a timing advance (TA) of a target cell, acquired by respective acquisition schemes including a user equipment (UE)-based acquisition scheme and a random access channel (RACH)-based acquisition scheme. The method includes acquiring a UE-based TA value according to the UE-based acquisition scheme, and transmitting a random access preamble to the target cell that is configured to acquire a RACH-based TA value according to the RACH-based acquisition scheme. The method includes receiving a cell-switch command from a serving cell to trigger a cell switch to the target cell, after the UE-based TA value and the RACH-based TA value are acquired. And the method includes accessing the target cell using a TA value selected from the UE-based TA value and the RACH-based TA value, based on the configuration.

    LOWER LAYER RACH-LESS INTER-CELL MOBILITY
    25.
    发明申请
    LOWER LAYER RACH-LESS INTER-CELL MOBILITY 有权

    公开(公告)号：US20250106708A1

    公开(公告)日：2025-03-27

    申请号：US18713510

    申请日：2022-12-16

    Applicant: Nokia Technologies Oy

    Inventor： Ahmad AWADA ,  Srinivasan SELVAGANAPATHY ,  Subramanya CHANDRASHEKAR ,  Alperen GUNDOGAN ,  Panagiotis SPAPIS ,  Amaanat ALI

    IPC: H04W36/00 ,  H04L5/00

    Abstract: In this invention, when a serving distributed unit informs target distributed unit via a central unit about a target reference, it is proposed to use, signal index X/indices X1 . . . Xn for PDCCH transmissions or PUSCH receptions or a RACH-less handover:
    Send by a distributed unit of the serving cell towards a distributed unit of a target cell one of before, upon, or after transmission of a layer 1 serving cell change command to a user equipment, signaling comprising configuration information associated with the user equipment to perform a random access channel less handover of the user equipment to the target cell, wherein the configuration information informs the target cell about at least one target reference signal index that shall be used for at least one of at least one physical downlink control channel transmission or at least one physical uplink shared channel reception.

    HANDOVER
    26.
    发明申请
    HANDOVER 有权

    公开(公告)号：US20250056628A1

    公开(公告)日：2025-02-13

    申请号：US18790344

    申请日：2024-07-31

    Applicant: Nokia Technologies Oy

    Inventor： Shehzad Ali ASHRAF ,  Panagiotis SPAPIS ,  Umur KARABULUT ,  Srinivasan SELVAGANAPATHY

    IPC: H04W74/0838

    Abstract: An apparatus (DU) comprising: means for receiving an identification of a serving network access node; and means for associating a sub-set of contention-free-random-access (CFRA) resources with the identified serving network access node. An apparatus (CU) comprising: means for sending a first message comprising an identification of a serving network access node (sDU) to enable association of a sub-set of contention-free-random-access (CFRA) resources with the identified serving network access node (sDU); and means for receiving, in reply, a second message specifying the association of the sub-set of contention-free-random-access (CFRA) resources with the identified serving network access node (sDU).

    UPLINK SWITCH TO SOURCE CELL IN DUAL ACTIVE PROTOCOL STACK HANDOVER
    29.
    发明申请
    UPLINK SWITCH TO SOURCE CELL IN DUAL ACTIVE PROTOCOL STACK HANDOVER 有权

    公开(公告)号：US20250048218A1

    公开(公告)日：2025-02-06

    申请号：US18292772

    申请日：2022-05-19

    Applicant: Nokia Technologies Oy

    Inventor： Panagiotis SPAPIS ,  Amad AWADA ,  Halit Murat GÜRSU ,  Samantha CAPORAL DEL BARRIO ,  Alperen GUNDOGAN

    IPC: H04W36/24 ,  H04L5/00 ,  H04W36/00 ,  H04W80/02

    Abstract: Systems, methods, apparatuses, and computer program products for uplink switch to source cell in dual active protocol stack handover. A method may include receiving a handover command. The method may also include identifying a maximum permissible exposure event at a user equipment before or after reception of the handover command. The method may further include delaying an uplink switch to a target network element from a source network element due to the maximum permissible exposure event, or switching back to the source network element. According to certain example embodiments, delaying the uplink switch may include setting an event trigger to switch to the target network element. In addition, the method may include informing the target network element about the maximum permissible exposure event, and about the delay in the uplink switch.

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