Method and apparatus for resuming RRC connection in CU-DU division scenario
AssigneeLG Electronics Inc.
InventorsSeokjung Kim, Daewook Byun, Jian Xu
Life of this patent
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Abstract
Provided are a method for resuming, by a distribution unit (DU) of a base station, a radio resource control (RRC) connection in a wireless communication system, and an apparatus for supporting the same. The method may comprise the steps of: receiving, from a terminal, an RRC connection resume request message; transmitting, to a central unit (CU) of the base station, an initial uplink (UL) RRC message transfer message including the RRC connection resume request message; receiving, from the CU, a UE context setup request message including a list of radio bearers to be set up; and transmitting, to the CU, the UE context setup response message including a list of established radio bearers.
Claims15
A method performed by a central unit (CU) of a base station in a wireless communication system, the method comprising:
- receiving, from a distributed unit (DU) of the base station, an initial uplink radio resource control (RRC) message transfer message comprising an RRC connection resume request message;
- transmitting, to the DU, a user equipment (UE) context setup request message comprising a list of one or more radio bearers to be setup and a radio link control (RLC) configuration related to the one or more radio bearers to be setup;
- and
- receiving, from the DU, a UE context setup response message comprising a list of one or more established radio bearers.
A central unit (CU) of a base station in a wireless communication system, the CU comprising:
- a memory;
- a transceiver;
- and
- at least one processor operatively coupled to the memory and the transceiver,
- wherein the at least one processor is configured to control the transceiver to:
- receive, from a distributed unit (DU) of the base station, an initial uplink radio resource control (RRC) message transfer message comprising an RRC connection resume request message,
- transmit, to the DU, a user equipment (UE) context setup request message comprising a list of one or more radio bearers to be setup and radio link control (RLC) configuration related to the one or more radio bearers to be setup, and
- receive, from the DU, a UE context setup response message comprising a list of one or more established radio bearers.
A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
- transmitting, to a distributed unit (DU) of a base station, a radio resource control (RRC) connection resume request message;
- receiving, from the DU, an RRC connection resume message after a UE context setup procedure;
- and
- transmitting, to the DU, an RRC connection resume complete message,
- wherein the UE context setup procedure is performed after an initial uplink RRC message transfer message comprising the RRC connection resume request message is transmitted from the DU to a central unit (CU) of the base station,
- wherein, in the UE context setup procedure, a UE context setup request message is transmitted from the CU to the DU and a UE context setup response message is transmitted from the DU to the CU,
- wherein the UE context setup request message comprises a list of one or more radio bearers to be setup and a radio link control (RLC) configuration related to the one or more radio bearers to be setup, and
- wherein the UE context setup response message comprises a list of one or more established radio bearers.
Dependencies are inferred from the claim text.