Methods, systems, and computer readable media for seamless roaming between diameter and non-diameter networks

A system for seamless roaming between networks, the system comprising:

• a home subscriber server (HSS) comprising at least one processor and a memory, the HSS comprising:
• a first network interface configured to receive and send non-Diameter signaling messages for managing mobility of the subscriber in a first network;
• and
• a second network interface configured to receive and send non-Diameter signaling messages for managing mobility of the subscriber in a first network,
• wherein the HSS is configured to maintain registration status information for a subscriber and to communicate with the first network via the first network interface and with the second network via the second network interface using the registration status information to facilitate roaming between the first network and the second network.

A non-transitory computer readable medium having stored thereon executable instructions that when executed by the processor of a computer control the computer to perform steps comprising:

• at a home subscriber server (HSS):
• maintaining registration status information for a subscriber;
• and
• communicating with a first network via a first network interface and with a second network via a second network interface using the registration status information to facilitate roaming between the first network and the second network, wherein the first network interface is configured to receive and send non-Diameter signaling messages for managing mobility of the subscriber and wherein the second network interface is configured to receive and send Diameter signaling messages for managing mobility of the subscriber.