Mobility management for RRC_INACTIVE user equipment
AssigneeFG Innovation Company Limited
InventorsMei-Ju Shih, Yung-Lan Tseng, Chie-Ming Chou
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Abstract
A method for radio access net work (RAN) based notification area (RNA) update for an RRC_INACTIVE user equipment (UE) is disclosed. The method includes initiating, by the RRC_INACTIVE UE, an RNA update procedure, when the RRC_INACTIVE UE is moving from a first base station to a second base station; and receiving, by the RRC_INACTIVE UE, the updated RNA, from at least one of a core network (CN), the first base station and the second base station.
Claims22
A method for radio access network (RAN) based notification area (RNA) update for a radio resource control (RRC) INACTIVE user equipment (UE) in an RRC_INACTIVE state, the method comprising:
- receiving, by the RRC_INACTIVE UE in the RRC_INACTIVE state, a first list of RAN area IDs from a first cell via a first RRC message;
- storing, by the RRC_INACTIVE UE in the RRC_INACTIVE state, the first list of RAN area IDs after receiving the first RRC message;
- receiving, by the RRC_INACTIVE UE in the RRC_INACTIVE state, a cell ID and a RAN area ID broadcast by a second cell;
- initiating, by the RRC_INACTIVE UE in the RRC_INACTIVE state, an RNA update procedure, when the RRC_INACTIVE UE in the RRC_INACTIVE state determines that the RAN area ID broadcast by the second cell does not belong to the first list of RAN area IDs stored in the RRC_INACTIVE UE in the RRC_INACTIVE state;
- receiving, by the RRC_INACTIVE UE in the RRC_INACTIVE state, a second list of RAN area IDs from the second cell via a second RRC message during the RNA update procedure;
- storing the second list of RAN area IDs by the RRC_INACTIVE UE in the RRC_INACTIVE state during the RNA update procedure after receiving the second RRC message;
- and
- performing, by the RRC_INACTIVE UE in the RRC_INACTIVE state, a random access procedure with the second cell;
- wherein the RRC_INACTIVE UE in the RRC_INACTIVE state sends at least one of an inactive-radio network temporary identifier (I-RNTI) and a cell ID of the first cell to the second cell.
A user equipment (UE) for wireless communication, the UE comprising:
- one or more non-transitory computer-readable media having computer-executable instructions embodied thereon;
- at least one processor coupled to the one or more non-transitory computer-readable media, and configured to execute the computer-executable instructions to:
- receive a first list of RAN area IDs from a first cell via a first radio resource control (RRC) message while the UE is in an RRC_INACTIVE state;
- store the first list of RAN area IDs after receiving the first RRC message;
- receive a cell ID and a RAN area ID broadcast by a second cell, while the UE is in the RRC_INACTIVE state;
- initiate a radio access network (RAN) based notification area (RNA) update procedure, when the UE in the RRC_INACTIVE state determines that the RAN area ID broadcast by the second cell does not belong to the first list of RAN area IDs stored in the UE in the RRC_INACTIVE state;
- receive a second list of RAN area IDs from the second cell via a second RRC message during the RNA update procedure, while the UE is in the RRC_INACTIVE state;
- store the second list of RAN area IDs during the RNA update procedure after receiving the second RRC message, while the UE is in the RRC_INACTIVE state;
- and
- perform a random access procedure with the second cell;
- wherein the UE in the RRC_INACTIVE state sends at least one of an inactive-radio network temporary identifier (I-RNTI) and a cell ID of the first cell to the second cell.
Dependencies are inferred from the claim text.