Method and system for handling paging in wireless communication system
Embodiments herein achieve a method for handling registration and session management in a wireless communication system. The method includes registering, by a User Equipment (UE), with a first core network entity over a 3GPP access network and a non-3GPP access network. Further, the method includes triggering, by the UE, a registration procedure to a second core network over the 3GPP access network when a periodic timer of the UE expires in an OOS state. Further, the method includes receiving, by the UE, a non-access stratum (NAS) message, over the 3GPP access network, with an indication to register for the non-3GPP access network with the second core network entity. Further, the method includes reinitiating the registration procedure to register again for the non-3GPP access with the second core network entity through the non-3GPP access network.
1 . A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
transmitting, to a first network entity, a registration request message for a registration update from a first communication system to a second communication system; and
receiving, from the first network entity, a registration accept message in response to the registration request message for the registration update,
wherein the registration request message includes a first Globally Unique Temporary Identifier (GUTI) from the first communication system and a second GUTI related to the second communication system, and
wherein the second GUTI related to the second communication system enables the first network entity to retrieve context information from a second network entity with which the UE registered over a non-3rd Generation Partnership Project (non-3GPP) access.
2 . The method of claim 1 , wherein the first network entity includes a first Access Management Function (AMF), and
wherein the second network entity includes a second AMF.
3 . The method of claim 1 , wherein the registration request message is transmitted over a 3GPP access.
4 . The method of claim 1 , wherein the registration accept message includes information indicating a result of the registration update.
5 . The method of claim 4 , wherein the information indicating the result of the registration update indicates that the UE is not registered for the non-3GPP access as the result of the registration update.
6 . The method of claim 5 , further comprising:
transmitting, to the first network entity, another registration request message for the non-3GPP access.
7 . The method of claim 5 , wherein the UE is registered for a 3GPP access only, after the registration update.
8 . The method of claim 1 , wherein the UE is registered over a 3GPP access and the non-3GPP access with a same network entity, after the registration update.
9 . A user equipment (UE) in a wireless communication system, the UE comprising:
a transceiver; and
at least one processor connected with the transceiver and configured to:
transmit, to a first network entity, a registration request message for a registration update from a first communication system to a second communication system; and
receive, from the first network entity, a registration accept message in response to the registration request message for the registration update,
wherein the registration request message includes a first Globally Unique Temporary Identifier (GUTI) from the first communication system and a second GUTI related to the second communication system, and
wherein the second GUTI related to the second communication system enables the first network entity to retrieve context information from a second network entity with which the UE registered over a non-3rd Generation Partnership Project (non-3GPP) access.
10 . The UE of claim 9 , wherein the first network entity includes a first Access Management Function (AMF), and
wherein the second network entity includes a second AMF.
11 . The UE of claim 9 , wherein the registration request message is transmitted over a 3GPP access.
12 . The UE of claim 9 , wherein the registration accept message includes information indicating a result of the registration update.
13 . The UE of claim 12 , wherein the information indicating the result of the registration update indicates that the UE is not registered for the non-3GPP access as the result of the registration update.
14 . The UE of claim 13 , wherein the at least one processor is further configured to:
transmit, to the first network entity, another registration request message for the non-3GPP access.
15 . The UE of claim 13 , wherein the UE is registered for a 3GPP access only, after the registration update.
16 . The UE of claim 9 , wherein the UE is registered over a 3GPP access and the non-3GPP access with a same network entity, after the registration update.
17 . The method of claim 1 , wherein the first GUTI from the first communication system includes a 5G-GUTI mapped from 4G-GUTI, and
wherein the second GUTI related to the second communication system includes an additional 5G-GUTI.
18 . The UE of claim 9 , wherein the first GUTI from the first communication system includes a 5G-GUTI mapped from 4G-GUTI, and
wherein the second GUTI related to the second communication system includes an additional 5G-GUTI.