Method for managing registration and session in wireless communication system and apparatus for performing the same
A communication technique that combines a 5G communication system for supporting a data rate that is higher than that of a beyond 4G system with IoT technology, and a system thereof are provided. The technique may be applied to intelligent services on the basis of 5G communication technology and IoT related technology, such as smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, etc. A method of performing access deregistration by a user equipment (UE) and an apparatus therefor are provided. The method includes, when the UE is registered on both 3rd generation partnership project (3GPP) access and non-3GPP access, transmitting, to an access and mobility management function (AMF), a deregistration request message to deregister the non-3GPP access over the 3GPP access, and receiving, from the AMF, a deregistration accept message corresponding to the deregistration request message over the 3GPP access.
1. A method of performing access deregistration by an access and mobility management function (AMF) serving a 3rd generation partnership project (3GPP) access and a non-3GPP access, the method comprising:
assigning, to a terminal, a temporary identifier (ID) during a registration procedure over the 3GPP access in a public land mobile network (PLMN), the assigned temporary ID is re-used in a registration procedure over the non-3GPP access for the terminal in the PLMN;
determining to initiate a deregistration procedure over the 3GPP access to deregister the non-3GPP access for the terminal, after the terminal is registered over the 3GPP access and the non-3GPP access; and
transmitting, to a session management function (SMF) based on the determination, a request for releasing a protocol data unit (PDU) session including a non-3GPP access PDU session ID,
wherein all PDU sessions associated with the non-3GPP access are released based on the request.
2. The method of claim 1 , further comprising:
receiving, from the terminal, a deregistration request message to deregister the non-3GPP access for the terminal over the 3GPP access, in case that the deregistration procedure is initiated by the terminal; and
transmitting, to the terminal, a deregistration accept message corresponding to the deregistration request message over the 3GPP access.
3. The method of claim 1 , wherein the deregistration procedure is initiated by the terminal in case that the terminal is out of a coverage for the non-3GPP access.
4. The method of claim 1 , wherein the deregistration procedure is initiated based on no connection of the non-3GPP access for the terminal.
5. The method of claim 1 , further comprising:
performing separate registration management for the 3GPP access and the non-3GPP access,
wherein the determining to initiate a deregistration procedure further comprises:
determining to operate a timer associated with the non-3GPP access, in case that the terminal is unable to use the non-3GPP access, and
identifying that the timer associated with the non-3GPP access is expired.
6. An access and mobility management function (AMF) serving a 3rd generation partnership project (3GPP) access and a non-3GPP access for performing access deregistration, the AMF comprising:
a transceiver; and
a controller coupled with the transceiver and configured to control to:
assign, to a terminal, a temporary identifier (ID) during a registration procedure over the 3GPP access in a public land mobile network (PLMN), the assigned temporary ID is re-used in a registration procedure over the non-3GPP access for the terminal in the PLMN,
determine to initiate a deregistration procedure over the 3GPP access to deregister the non-3GPP access for the terminal, after the terminal is registered over the 3GPP access and the non-3GPP access, and
transmit, to a session management function (SMF) based on the determination via the transceiver, a request for releasing a protocol data unit (PDU) session including a non-3GPP access PDU session ID,
wherein all PDU sessions associated with the non-3GPP access are released based on the request.
7. The AMF of claim 6 , wherein the controller is further configured to:
receive, from the terminal via the transceiver, a deregistration request message to deregister the non-3GPP access for the terminal over the 3GPP access, in case that the deregistration procedure is initiated by the terminal, and
transmit, to the terminal via the transceiver, a deregistration accept message corresponding to the deregistration request message over the 3GPP access.
8. The AMF of claim 6 , wherein the deregistration procedure is initiated by the terminal in case that the terminal is out of a coverage for the non-3GPP access.
9. The AMF of claim 6 , wherein the deregistration procedure is initiated based on no connection of the non-3GPP access for the terminal.
10. The AMF of claim 6 , wherein the controller is further configured to:
perform separate registration management for the 3GPP access and the non-3GPP access,
determine to operate a timer associated with the non-3GPP access, in case that the terminal is unable to use the non-3GPP access, and
identify that the timer associated with the non-3GPP access is expired.
11. A method of performing access deregistration by a terminal, the method comprising:
receiving, from an access and mobility management function (AMF), an assigned temporary identifier (ID) during a registration procedure over a 3rd generation partnership project (3GPP) access in a public land mobile network (PLMN), the assigned temporary ID is re-used in a registration procedure over a non-3GPP access for the terminal in the PLMN,
wherein a deregistration procedure over the 3GPP access to deregister the non-3GPP access for the terminal is initiated by the AMF after the terminal is registered over the 3GPP access and the non-3GPP access,
wherein a request for releasing a protocol data unit (PDU) session including a non-3GPP access PDU session ID is transmitted, from the AMF to a session management function (SMF), and
wherein all PDU sessions associated with the non-3GPP access are released based on the request.
12. The method of claim 11 , further comprising:
transmitting, to the AMF, a deregistration request message to deregister the non-3GPP access for the terminal over the 3GPP access, in case that the deregistration procedure is initiated by the terminal; and
receiving, from the AMF, a deregistration accept message corresponding to the deregistration request message over the 3GPP access.
13. The method of claim 11 , wherein the deregistration procedure is initiated by the terminal in case that the terminal is out of a coverage for the non-3GPP access.
14. The method of claim 11 , wherein the deregistration procedure is initiated based on no connection of the non-3GPP access for the terminal.
15. The method of claim 11 ,
wherein separate registration management for the 3GPP access and the non-3GPP access is performed,
wherein a timer associated with the non-3GPP access is operated, in case that the terminal is unable to use the non-3GPP access, and
wherein the timer associated with the non-3GPP access is expired is identified by the AMF.
16. A terminal for performing access deregistration, the terminal comprising:
a transceiver; and
a controller coupled with the transceiver and configured to control to:
receive, from an access and mobility management function (AMF) via the transceiver, an assigned temporary identifier (ID) during a registration procedure over a 3rd generation partnership project (3GPP) access in a public land mobile network (PLMN), the assigned temporary ID is re-used in a registration procedure over a non-3GPP access for the terminal in the PLMN,
wherein a deregistration procedure over the 3GPP access to deregister the non-3GPP access for the terminal is initiated by the AMF, after the terminal is registered over the 3GPP access and the non-3GPP access,
wherein a request for releasing a protocol data unit (PDU) session including a non-3GPP access PDU session ID is transmitted, from the AMF to a session management function (SMF), and
wherein all PDU sessions associated with the non-3GPP access are released based on the request.
17. The terminal of claim 16 , wherein the controller is further configured to:
transmit, to the AMF via the transceiver, a deregistration request message to deregister the non-3GPP access for the terminal over the 3GPP access, in case that the deregistration procedure is initiated by the terminal, and
receive, from the AMF via the transceiver, a deregistration accept message corresponding to the deregistration request message over the 3GPP access.
18. The terminal of claim 16 , wherein the deregistration procedure is initiated by the terminal in case that the terminal is out of a coverage for the non-3GPP access.
19. The terminal of claim 16 , wherein the deregistration procedure is initiated based on no connection of the non-3GPP access for the terminal.
20. The terminal of claim 16 ,
wherein separate registration management for the 3GPP access and the non-3GPP access is performed,
wherein a timer associated with the non-3GPP access is operated, in case that the terminal is unable to use the non-3GPP access, and
wherein, that the timer associated with the non-3GPP access is expired is identified by the AMF.