Peer-to-Peer Interconnection between Service Providers

1. A method, comprising: receiving, at a session controller in a home service provider network, a request for access to a target communication device, the target communication device being communicatively coupled to a foreign service provider network; referencing a list of available routes for peer-to-peer communication with the target communication device on the foreign service provider network from a database of available routes maintained by the foreign service provider network; identifying, in a peer-to-peer interconnect controller node in the home service provider network and/or the foreign service provider network, the peer-to-peer interconnect controller node separate from the requesting device, a path for communication with the target communication device in response to the list of available routes; and establishing a peer-to-peer communication session from a peering point in the home service provider network associated with, and separate from, the requesting device, directly to a peering point in the foreign service provider network associated with, and separate from, the target communication device, over the path.

2. The method of claim 1 , wherein referencing the list of available routes does not include a central route lookup function.

3. The method of claim 1 , wherein the list of available routes is stored, at least in part, in a database of available routes maintained on the home service provider network.

4. The method of claim 1 , further comprising performing an E.164 Number query to identify the foreign service provider network.

5. The method of claim 1 , further comprising querying a Domain Name System (DNS) server to identify a network address for the peer-to-peer interconnect control node associated with the foreign service provider network.

6. The method of claim 1 , wherein referencing a list of available routes for peer-to-peer communication with the target communication device and/or identifying a path for communication with the target communication device further comprises querying the peer-to-peer interconnect control node associated with the foreign service provider network to identify routing information for reaching the target communication device.

7. The method of claim 6 , wherein the routing information comprises a list of available routes stored in a database of available routes maintained on the foreign service provider network.

8. The method of claim 6 , further comprising rendering a Session Detail Record (SDR) for route use in response to the routing information for reaching the target communication device.

9. The method of claim 1 , wherein establishing a peer-to-peer communication session further comprises establishing a signaling session directly between the peering point on the foreign service provider network and the peering point on a home service provider network.

10. The method of claim 1 , wherein establishing a peer-to-peer communication session further comprises establishing a direct media path between the peering point on the foreign service provider network and the peering point on a home service provider network.

11. A system, comprising: a session controller node configured to receive a request for access to a target communication device, the target communication device being communicatively coupled to a foreign service provider network; a peer-to-peer interconnect controller node coupled to the session controller node and separate from a requesting device, the peer-to-peer interconnect controller node configured to: reference a list of available routes for peer-to-peer communication with the target communication device on the foreign service provider network maintained by the foreign service provider network; and identify a path for communication with the target communication device in response to the list of available routes; and a peering point separate from the requesting device and coupled to the session controller and configured to establish a direct peer-to-peer communication session with a peering point in the foreign service provider network associated with, and separate from, the target communication device, over the path.

12. The system of claim 11 , wherein referencing the list of available routes does not include a central route lookup function.

13. The system of claim 11 , further comprising an available routes database on a home service provider network, the available routes database configured to store at least a part of the list of available routes.

14. The system of claim 11 , further comprising an E.164 Number database configured to store information for identifying the foreign service provider network.

15. The system of claim 11 , further comprising a Domain Name System (DNS) server configured to identify a network address for a peer-to-peer interconnect control node associated with the foreign service provider network.

16. The system of claim 11 , further comprising a peer-to-peer interconnect control node associated with the foreign service provider network configured to identify routing information for reaching the target communication device.

17. The system of claim 16 , further comprising a database of available routes maintained on the foreign service provider network configured to store the routing information comprising a list of the available routes.

18. The system of claim 16 , wherein the peer-to-peer interconnect control associated with the foreign service provider network is configured to render a Session Detail Record (SDR) for accounting use in response to the information for reaching the target communication device.

19. The system of claim 11 , wherein establishing a peer-to-peer communication session further comprises establishing a signaling session directly between the peering point on the foreign service provider network and the peering point coupled to the session controller.

20. The system of claim 11 , wherein establishing a peer-to-peer communication session further comprises establishing a direct media path between the peering point coupled to the session controller and the peering point in the foreign service provider network.

21. A tangible computer-readable storage medium having program instructions stored thereon that, upon execution by a computer system, causes the computer system to: receive a request from a requesting communication device separate from the computer system for access to a target communication device, the target communication device being communicatively coupled to a foreign service provider network; reference a list of available routes for peer-to-peer communication with the target communication device on the foreign service provider network; identify a path for communication with the target communication device in response to the list of available routes; and establish a peer-to-peer communication session directly between a peering point associated with and separate from the requesting device in a home service provider network and a peering point in the foreign service provider network associated with and separate from the target communication device, over the path.