Registration management method for terminal accessing 5G network on non-3GPP access
A communication technique of fusing a fifth generation (5G) communication for supporting higher data transmission rate beyond a fourth generation (4G) system with an Internet of things (IoT) technology and a system thereof is provided. The technique may be applied to an intelligent service (smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security and safety related service, or the like) based on the 5G communication technology and the IoT related technology. A method is provided for effectively managing a registration state for a terminal in a 5G core network such as an access and mobility management function (AMF) in a situation of accessing a 5G network via a non-3rd generation partnership project (3GPP) access.
1. A method performed by a base station in a wireless communication system, the method comprising:
identifying that a terminal enters a radio resource control (RRC) inactive state; and
transmitting, to an access and mobility management function (AMF) entity, a report message including information indicating a current RRC state of the terminal, based on the identification,
wherein the report message further includes information on a current location of the terminal.
2. The method of claim 1 , further comprising:
receiving, from the AMF entity, a request message requesting location information of the terminal while the terminal is in the RRC inactive state; and
transmitting, to the AMF entity, a location report message including last known location information of the terminal identified by the base station and a time stamp associated with the last known location information of the terminal as a response to the request message.
3. The method of claim 1 , wherein the information on the current location of the terminal comprises at least one of an identity of a cell for the terminal, a tracking area identifier for the terminal, or an identifier of a base station serving the terminal.
4. The method of claim 1 , further comprising:
receiving, from the AMF entity, a request message requesting location information of the terminal while the terminal is in the RRC inactive state;
transmitting a radio access network (RAN) paging for the terminal based on the request message;
determining a current location of the terminal based on the RAN paging; and
transmitting, to the AMF entity, a location report message including information on the current location of the terminal as a response to the request message.
5. The method of claim 2 , wherein the location report message is continuously reported whenever the terminal changes cell.
6. A method performed by an access and mobility management function (AMF) entity in a wireless communication system, the method comprising:
receiving a report message transmitted from a base station in case that a terminal enters a radio resource control (RRC) inactive state, the report message including information indicating a current RRC state of the terminal; and
identifying that the terminal enters the RRC inactive state based on the report message,
wherein the report message further includes information on a current location of the terminal.
7. The method of claim 6 , further comprising:
transmitting, to the base station, a request message requesting location information of the terminal; and
receiving, from the base station, a location report message including last known location information of the terminal identified by the base station and a time stamp associated with the last known location information of the terminal as a response to the request message,
wherein the location report message is a response to the request message that reaches at the base station while the terminal is in the RRC inactive state.
8. The method of claim 6 , wherein the information on the current location of the terminal comprises at least one of an identity of a cell for the terminal, a tracking area identifier for the terminal, or an identifier of a base station serving the terminal.
9. The method of claim 6 , further comprising:
transmitting, to the base station, a request message requesting location information of the terminal; and
receiving, from the base station, a location report message including information on a current location of the terminal as a response to the second request message,
wherein the location report message is a response to the request message that reaches at the base station while the terminal is in the RRC inactive state, and
wherein the information on the current location information of the terminal is determined based on a radio access network (RAN) paging procedure.
10. The method of claim 7 , wherein the location report message is continuously reported whenever the terminal changes cell.
11. A base station in a wireless communication system, the base station comprising:
a transceiver; and
a controller configured to:
identify that a terminal enters a radio resource control (RRC) inactive state, and
transmit, to an access and mobility management function (AMF) entity via the transceiver, a report message including information indicating a current RRC state of the terminal, based on the identification,
wherein the report message further includes information on a current location of the terminal.
12. The base station of claim 11 , wherein the controller is further configured to:
receive, from the AMF entity via the transceiver, a request message requesting location information of the terminal while the terminal is in the RRC inactive state, and
transmit, to the AMF entity via the transceiver, a location report message including last known location information of the terminal identified by the base station and a time stamp associated with the last known location information of the terminal as a response to the request message.
13. The base station of claim 11 , wherein the information on the current location of the terminal comprises at least one of an identity of a cell for the terminal, a tracking area identifier for the terminal, or an identifier of a base station serving the terminal.
14. The base station of claim 11 , wherein the controller is further configured to:
receive, from the AMF entity via the transceiver, a request message requesting location information of the terminal while the terminal is in the RRC inactive state,
transmit, via the transceiver, a radio access network (RAN) paging for the terminal based on the request message,
determine a current location of the terminal based on the RAN paging, and
transmit, to the AMF entity via the transceiver, a location report message including information on the current location of the terminal as a response to the request message.
15. The base station of claim 12 , wherein the location report message is continuously reported whenever the terminal changes cell.
16. An access and mobility management function (AMF) entity in a wireless communication system, the AMF entity comprising:
a transceiver; and
a controller configured to:
receive, via the transceiver, a report message transmitted from a base station in case that a terminal enters a radio resource control (RRC) inactive state, the report message including information indicating a current RRC state of the terminal, and
identify that the terminal enters the RRC inactive state based on the report message,
wherein the report message further includes information on a current location of the terminal.
17. The AMF entity of claim 16 ,
wherein the controller is further configured to:
transmit, to the base station via the transceiver, a request message requesting location information of the terminal, and
receive from the base station via the transceiver, a location report message including last known location information of the terminal identified by the base station and a time stamp associated with the last known location information of the terminal as a response to the request message, and
wherein the location report message is a response to the first request message that reaches at the base station while the terminal is in the RRC inactive state.
18. The AMF entity of claim 16 , wherein the information on the current location of the terminal comprises at least one of an identity of a cell for the terminal, a tracking area identifier for the terminal, or an identifier of a base station serving the terminal.
19. The AMF entity of claim 16 , wherein the controller is further configured to:
transmit, to the base station via the transceiver, a request message requesting location information of the terminal,
receive, from the base station via the transceiver, a location report message including information on a current location of the terminal as a response to the request message,
wherein the location report message is a response to the request message that reaches at the base station while the terminal is in the RRC inactive state, and
wherein the information on the current location information of the terminal is determined based on a radio access network (RAN) paging procedure.
20. The AMF entity of claim 17 , wherein the location report message is continuously reported whenever the terminal changes cell.