Patent ID: 8170565
Filing Date: 2012-05-01
Classification: H04L,H04M,H04W

Abstract:
1. A method of domain selection for routing an incoming call to a user via a Circuit Switched (CS) network or an IP Multimedia Subsystem (IMS) network, comprising: receiving, by a Routing Policy Decision Point (RPDP), a routing decision query request from a routing decision query entity which receives a request for establishing the incoming call; obtaining, by the RPDP, call status(es) of the user in any one or both of the CS network and the IMS network; selecting, by the RPDP, a domain between the CS network and the IMS network via which the incoming call is to be delivered to the user, according to the call status(es) of the user; and instructing the routing decision query entity to deliver the incoming call via the selected domain.