Handling of IP Multimedia Subsystem VoPS Indication
AssigneeMediatek Inc.
InventorsMarko Niemi, Chien-Chun Huang-Fu
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Abstract
A solution of supporting IP multimedia subsystem (IMS) call setup in a next generation system (5GS) is proposed. During a registration procedure, the network sends indications to a user equipment (UE) indicating whether IMS voice over PS session (VoPS) over 3GPP access and over non-3GPP access is supported or not. The indications comprise two independent indicators, one indicator for indicating whether IMS VoPS is supported over 3GPP access, and the other indicator for indicating whether IMS VoPS is supported over non-3GPP access. In one example, the two independent indicators are included in a 5GS network feature support information element (IE) carried by a registration accept message sent from the network during the registration procedure.
Claims20
A method of handling IP multimedia subsystem (IMS) Voice over Packet-Switched (VoPS) service indication, comprising:
- transmitting a registration request message from a user equipment (UE) in mobile communication network, wherein the registration request message is sent over 3GPP access or non-3GPP access;
- receiving a registration accept message from the network, wherein the accept message comprises IMS VoPS service indications;
- determining whether IMS VoPS is supported over 3GPP access and non-3GPP access;
- and
- registering to another radio access technology (RAT) for voice service when IMS VoPS is not supported over a current RAT.
A User Equipment (UE), comprising:
- a transmitter that transmits a registration request message in mobile communication network, wherein the registration request message is sent over 3GPP access or non-3GPP access;
- a receiver that receives a registration accept message from the network, wherein the accept message comprises IP Multimedia Subsystem (IMS) voice over Packet-Switched (VoPS) service indications;
- and
- a control and configuration circuit that determines whether IMS VoPS is supported over 3GPP access and non-3GPP access, and the UE registers to another radio access technology (RAT) for voice service when IMS VoPS is not supported over a current RAT.
Dependencies are inferred from the claim text.