Factor for multiple device registrations

An apparatus for performing a network function, the apparatus comprising:

• at least one memory;
• and
• at least one processor coupled with the at least one memory and configured to cause the apparatus to:
• receive, from a first device, a first session initiation protocol (SIP) message comprising an identity for establishing a data session;
• determine, for the identity, a plurality of user equipment (UE) instances registered for a multi-device (MuD) service, each UE instance represented by a UE-instance element having an alias identifying the corresponding UE instance;
• select, among the plurality of UE instances, a target UE instance based on an attribute associated with the alias of the UE instance;
• transmit a second SIP message comprising the identity and an indication of the target UE instance to a selected UE instance;
• and
• establish the data session between the first device and the selected UE instance.

A processor for wireless communication, comprising:

• at least one controller coupled with at least one memory and configured to cause the processor to:
• receive, from a first device, a first session initiation protocol (SIP) message comprising an identity for establishing a data session;
• determine, for the identity, a plurality of user equipment (UE) instances registered for a multi-device (MuD) service, each UE instance represented by a UE-instance element having an alias identifying the corresponding UE instance;
• select, among the plurality of UE instances, a target UE instance based on an attribute associated with the alias of the UE instance;
• transmit a second SIP message comprising the identity and an indication of the target UE instance to a selected UE instance;
• and
• establish the data session between the first device and the selected UE instance.

A method for performing a network function, the method comprising:

• receiving, from a first device, a first session initiation protocol (SIP) message comprising an identity for establishing a data session;
• determining, for the identity, a plurality of user equipment (UE) instances registered for a multi-device (MuD) service, each UE instance represented by a UE-instance element having an alias identifying the corresponding UE instance;
• selecting, among the plurality of UE instances, a target UE instance based on an attribute associated with the alias of the UE instance;
• transmitting a second SIP message comprising the identity and an indication of the target UE instance to a selected UE instance;
• and
• establishing the data session between the first device and the selected UE instance.