Patent ID: 9088585
Filing Date: 2015-07-21
Classification: H04L

Abstract:
1. A method comprising: receiving, by an ingress network-to-network interface device of a network, a signaling message to establish a communication session, wherein the signaling message is received from a network device of a first network, and wherein the network is an Internet Protocol Multimedia Subsystem network; adding, by the ingress network-to-network interface device, an identifier, which identifies the ingress network-to-network interface device, to the signaling message; transmitting, by the ingress network-to-network interface device, the signaling message that includes the identifier to another device of the network to which the ingress network-to-network interface device belongs, wherein the other device includes a server device that provides session control for the communication session; receiving, by the other device, the signaling message that includes the identifier or a modified signaling message that includes the identifier; selecting, by the other device, an egress network-to-network interface device of the network based on the identifier and a minimum path criterion between the ingress network-to-network interface device and the egress network-to-network interface device; and transmitting, by the other device, the signaling message or the modified signaling message to the egress network-to-network interface device.