Method for synchronizing status of ue in a communication network

Abstract

The present disclosure relates to synchronizing a temporary identity in the UE and the network when the UE is RRC Inactive state over 3GPP access and temporary identity of the UE is changed over a Non-3GPP access in a scenario when the UE is connected to the same AMF via 3GPP and non-3GPP access.

1 . A method for an Access and Mobility Management Function (AMF), the method comprising:
 sending, through a 3GPP access node, a first temporary mobile identity for a User Equipment (UE) to the UE, during a first Non Access Stratum (NAS) procedure between the UE and the AMF; and   updating from the first temporary mobile identity to a second temporary mobile identity and sending, through a non-3GPP access node, the second temporary mobile identity to the UE, during a second NAS procedure between the UE and the AMF over non-3GPP access,   wherein the method is further comprising:   sending, to the 3GPP access node, a third temporary mobile identity for the UE in a case where the second temporary mobile identity is sent to the UE through the non-3GPP access node, wherein the third temporary mobile identity is the second temporary mobile identity or is derived from the second temporary mobile identity.   
     
     
         2 . The method according to  claim 1 , wherein
 the third temporary mobile identity is derived from the second temporary mobile identity.   
     
     
         3 . A method for a 3GPP access node, the method comprising:
 transferring a first temporary mobile identity for a User Equipment (UE) from an Access and Mobility Management Function (AMF), during a first Non Access Stratum (NAS) procedure between the UE and the AMF;   instructing the UE to transit a Radio Resource Control (RRC) INACTIVE state, wherein the UE maintain Connection Management (CM)-CONNECTED state after the transiting to the RRC INACTIVE state; and   storing an identity corresponding to the first temporary mobile identity for Radio Access Network (RAN) paging;   wherein the method is further comprising:   receiving a third temporary mobile identity for the UE from the UE or the AMF, wherein the third temporary mobile identity is a second temporary mobile identity or is derived from the second temporary mobile identity.   
     
     
         4 . The method according to  claim 3 , wherein
 the third temporary mobile identity is received from the AMF and is derived from the second temporary mobile identity.   
     
     
         5 . A method for User Equipment (UE), the method comprising:
 receiving, through a 3GPP access node, a first temporary mobile identity for the UE from an Access and Mobility Management Function (AMF), during a first Non Access Stratum (NAS) procedure between the UE and the AMF;   transiting to Connection Management (CM)-CONNECTED state with a Radio Resource Control (RRC) INACTIVE state;   receiving, through a non-3GPP access node, a second temporary mobile identity for the UE from the AMF, during a second NAS procedure between the UE and the AMF over non-3GPP access;   wherein the method is further comprising:   monitoring Radio Access Network (RAN) paging based on an identity corresponding to the second temporary mobile identity.   
     
     
         6 . The method according to  claim 5 , further comprising:
 sending a third temporary mobile identity of the UE to the 3GPP access node, wherein the third temporary mobile identity is the second temporary mobile identity or is derived from the second temporary mobile identity,   
     
     
         7 . The method according to  claim 6 , wherein the third temporary mobile identity is sent in one of an RRC Connection Resume Request message and an RRC Connection Reestablishment Request message,
 wherein the UE is configured to capable of re-entering to or keeping the RRC INACTIVE state after the sending the third temporary mobile identity.   
     
     
         8 . The method according to  claim 5 , wherein the RAN paging is sent through the 3GPP access node. 
     
     
         9 . A User Equipment (UE) comprising:
 at least one processor; and   a memory coupled to the at least one processor, wherein the at least one processor configured to:   receive, through a 3GPP access node, a first temporary mobile identity for the UE from an Access and Mobility Management Function (AMF), during a first Non Access Stratum (NAS) procedure between the UE and the AMF;   transit to Connection Management (CM)-CONNECTED state with a Radio Resource Control (RRC) INACTIVE state;   receive, through a non-3GPP access node, a second temporary mobile identity for the UE from the AMF, during a second NAS procedure between the UE and the AMF over the non-3GPP access;   monitor Radio Access Network (RAN) paging based on an identity corresponding to the second temporary mobile identity.   
     
     
         10 . The UE as claimed in  claim 9 , wherein the at least one processor configured to send a third temporary mobile identity of the UE to the 3GPP access node, wherein the third temporary mobile identity is the second temporary mobile identity or is derived from the second temporary mobile identity, 
     
     
         11 . The UE according to  claim 10 , wherein the third temporary mobile identity is sent in one of an RRC Connection Resume Request message and an RRC Connection Reestablishment Request message,
 wherein the UE is configured to capable of re-entering to or keeping the RRC INACTIVE state after the sending the third temporary mobile identity.   
     
     
         12 . The UE according to  claim 10 , wherein the RAN paging is sent through the 3GPP access node.