Patent ID: 8340670
Filing Date: 2012-12-25
Classification: H04L,H04W

Abstract:
1. A method, comprising: maintaining, by a network device, information identifying a plurality of fully qualified domain names (FQDNs), each fully qualified domain name (FQDN) of the plurality of FQDNs, corresponding to one or more session initiation protocol (SIP) servers; receiving, by the network device, a request to attach a client device to a network for Internet Protocol (IP) multimedia subsystem (IMS) services; selecting, by the network device and based on the information identifying the plurality of FQDNs, a first FQDN from the plurality of FQDNs, the first FQDN corresponding to a first group of SIP servers to process SIP signaling packets for the client device; and transmitting, by the network device and based on the request to register the client device, a message initiating resolution of the first FQDN into a plurality of IP addresses, each of the plurality of IP address corresponding to one of the first group of SIP servers.