Apparatus and method for network assisted domain selection

An apparatus of a User Equipment (UE) for initiating a service in a mobile communication network, the apparatus comprising:

• processing circuitry to:
• initiate the service for a service type using a current domain;
• detect a service initiation failure for the service;
• and
• generate domain selection assistance information (DSAI) based on the detected service initiation failure, wherein the DSAI includes the service type and the current domain;
• and
• transceiver circuitry to send the DSAI to a network entity, wherein the sending of the DSAI is configured to assist the network entity in selecting a preferred domain for the service type when the UE initiates a new service.

A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors to perform operations for initiating a service in a cellular network, the operations to configure a User Equipment (UE) to:

• initiate the service for a service type using a current domain;
• detect a service initiation failure for the service;
• in response to the detected service initiation failure:
• re-initiate the service for the service type using an updated domain, the updated domain being different than the current domain;
• and
• generate domain selection assistance information (DSAI), wherein the DSAI includes the service type, the current domain, and the updated domain;
• send the DSAI to a network entity, wherein the sending of the DSAI is configured to assist the network entity in selecting a preferred domain for the service type when the UE initiates a new service.

A diagnostic and assistance server configured to assist in initiating a new service initiation in a mobile communication network, the diagnostic and assistance comprising:

• processing circuitry to:
• receive, from a User Equipment (UE), a domain selection assistance information (DSAI) associated with a detection of a service initiation failure, wherein the DSAI includes a service failure report, a service type, and a current domain;
• and
• determine a preferred domain for the service type based on the received DSAI, the preferred domain being different than the current domain;
• and
• an interface to send domain selection assistance data (DSAD) to the UE for initiation of the new service, the DSAD including the preferred domain for the service type.