Method for UE context management and device for supporting same
Disclosed are a method whereby a base station manages a UE context in a wireless communication system, and a device for supporting same. The method comprises the steps of: receiving paging-related information of UE from a core network node; storing the paging-related information; and carrying out paging with respect to the UE on the basis of the paging-related information after the UE has entered an RRC-inactive state.
1. A method for managing, by a base station (BS), user equipment (UE) context in a wireless communication system, the method comprising:
receiving an initial context setup request message including information for an inactive state on a UE from a core network node, wherein the information for the inactive state includes a tracking area identity (TAI) for a UE and an identity of the UE;
storing the information for the inactive state; and
after the UE enters the inactive state, initiating a radio access network (RAN) paging procedure for the UE in a paging area based on the stored information for the inactive state.
2. The method of claim 1 , wherein the initial context setup request message comprises information on at least one of, a paging discontinuous reception (DRX) of a core network, a periodic tracking area update (TAU) timer, a UE mobility pattern, or UE history information.
3. The method of claim 1 , wherein the UE enters the inactive state by transmitting a state change message after receiving the initial context setup request message.
4. The method of claim 1 , further comprising receiving a service request message from the UE before receiving the initial context setup request message.
5. The method of claim 1 , wherein the BS is an evolved Node B eNB or a next generation Node B gNB.
6. The method of claim 1 , wherein the core network node is a Mobility Management Entity MME or a next-generation core CP function (NGC AMF).
7. A base station (BS) configured to manage user equipment (UE) context in a wireless communication system, the BS comprising:
a memory;
a transceiver; and
a processor to connect the memory and the transceiver,
wherein the processor is configured to:
receive an initial context setup request message including information for an inactive state from a core network node, wherein the information for the inactive state includes a tracking area identity (TAI) for a UE and an identity of the UE;
store the information for the inactive state; and
after the UE enters the inactive state, initiate a radio access network (RAN) paging procedure for the UE in a paging area based on the stored information for the inactive state.
8. The BS of claim 7 , wherein the initial context setup request message comprises information on at least one of a paging discontinuous reception (DRX) of a core network, a periodic tracking area update (TAU) timer, a UE mobility pattern, and UE history information.
9. The BS of claim 7 , wherein the UE enters the inactive state by transmitting a state change message.
10. The BS of claim 7 , wherein before receiving the initial context setup request message, the processor is configured to receive a service request message from the UE.
11. The BS of claim 7 , wherein the BS is an evolved Node B eNB or a next generation Node B gNB.
12. The BS of claim 7 , wherein the core network node is a Mobility Management Entity MME or a next-generation core CP function (NGC AMF).