Systems and methods for user capability exchange across networks

A device, comprising:

• one or more processors configured to:
• receive a session initiation protocol (SIP) request for a specific service involving a first user equipment that is subscribed to a first network and a second user equipment that is subscribed to a second network different from the first network,
• wherein the first user equipment does not have a subscription with the second network,
• wherein the first network and the second network are managed by different mobile network operators,
• wherein the second network includes a plurality of subnetworks and a plurality of second network devices corresponding to the plurality of subnetworks,
• wherein the SIP request is received via a single Internet protocol multimedia subsystem (IMS) of the first network,
• wherein the SIP request indicates a service type, of a plurality of service types, for the specific service that includes at least an IMS service managed by a particular second network device, of the plurality of second network devices and corresponding to a particular subnetwork of the plurality of subnetworks, and
• wherein each of the plurality of second network devices manages communication for a different one of the plurality of service types;
• process the SIP request to identify the service type;
• determine, based on mapping of the service type, that the particular second network is to facilitate the specific service,
• wherein the mapping includes information associating the particular subnetwork with information associated with a corresponding set of service types, including the service type, handled by the particular subnetwork, and includes an address associated with the particular second network device;
• transmit the SIP request to the particular second network device to cause the particular second network device to initiate the specific service with the second user equipment;
• and
• prevent, based on the service type, the SIP request from being transmitted by the device to another second network device, of the plurality of second network devices, that is not designated to manage communication that is associated with the service type.

A non-transitory computer-readable medium storing instructions, the instructions comprising:

• one or more instructions that, when executed by one or more processors, cause the one or more processors to:
• receive a session initiation protocol (SIP) request that is associated with a first user equipment subscribed to a first network and a second user equipment subscribed to a second network that is different from the first network,
• wherein the first user equipment does not have a subscription with the second network,
• wherein the first network and the second network are managed by different mobile network operators,
• wherein the second network includes a plurality of subnetworks and a plurality of second network devices corresponding to the plurality of subnetworks,
• wherein the SIP request is received via a single Internet protocol multimedia subsystem (IMS) of the first network,
• wherein the SIP request identifies a service type, of a plurality of service types, of a specific service for a session between the first user equipment and the second user equipment,
• wherein the service type corresponds to an IMS service that is managed by a particular second network device, of the plurality of second network devices and corresponding to a particular subnetwork of the plurality of subnetworks, and
• wherein each of the plurality of second network devices manages a communication for a different one of the plurality of service types;
• identify, based on mapping of the service type, the particular second network device that is to facilitate the specific service for the session,
• wherein the mapping includes information associating the particular subnetwork with information associated with a corresponding set of service types, including the service type, handled by the particular subnetwork, and includes an address associated with the particular second network device;
• transmit the SIP request to the particular second network device to cause the particular second network device to initiate the session with the second user equipment;
• and
• prevent, based on the service type, the SIP request from being transmitted to another second network device, of the plurality of second network devices, that is not designated to manage communication that is associated with the service type.