US Patent Application 17752411. USER EQUIPMENT (UE) POLICY FOR SELECTION OF RADIO ACCESS TECHNOLOGY (RAT) TYPE FOR MOBILITY FROM NON-3GPP TO 3GPP ACCESSES simplified abstract
USER EQUIPMENT (UE) POLICY FOR SELECTION OF RADIO ACCESS TECHNOLOGY (RAT) TYPE FOR MOBILITY FROM NON-3GPP TO 3GPP ACCESSES
Organization Name
Inventor(s)
Irfan Ali of San Francisco CA (US)
Vimal Srivastava of Bangalore (IN)
USER EQUIPMENT (UE) POLICY FOR SELECTION OF RADIO ACCESS TECHNOLOGY (RAT) TYPE FOR MOBILITY FROM NON-3GPP TO 3GPP ACCESSES - A simplified explanation of the abstract
This abstract first appeared for US patent application 17752411 titled 'USER EQUIPMENT (UE) POLICY FOR SELECTION OF RADIO ACCESS TECHNOLOGY (RAT) TYPE FOR MOBILITY FROM NON-3GPP TO 3GPP ACCESSES
Simplified Explanation
- The patent application describes a method for communicating a user equipment (UE) policy to a UE. - The UE policy, called UE Route Selection Policy (URSP), includes a policy rule that associates an application and/or its traffic with a routing policy for 3GPP access. - When the UE needs to communicate the traffic of the application via non-3GPP access, it sends an attach request message with a request type indicating "handover" to trigger a handover of the communication session from non-3GPP access to 3GPP access. - The attach request message is sent via a selected radio access network (RAN) corresponding to the indicated radio access technology (RAT) type in the routing policy. - In cases where Voice over NR (VoNR) is not available, the indicated RAT type in the routing policy may be set to indicate an E-UTRAN.
Original Abstract Submitted
In one illustrative example, a user equipment (UE) policy may be communicated to a UE. The UE policy may be a UE Route Selection Policy (URSP) which includes a policy rule that associates an application and/or traffic thereof with a routing policy comprising an indicated radio access technology (RAT) type for 3GPP access. When the UE operates to communicate the traffic in a communication session for the application via non-3GPP access, a message which indicates an attach request with a request type indicating “handover” may be received from the UE via a selected radio access network (RAN) corresponding to the indicated RAT type. The message is for triggering a handover of the communication session for the application from the non-3GPP access to the 3GPP access. In one scenario, when Voice over NR (VoNR) is unavailable, the indicated RAT type of the routing policy may be set to indicate an E-UTRAN.
