Patent ID: 7590092
Filing Date: 2009-09-15
Classification: H04W

Abstract:
1. A method for inter-network handoff of a voice call from a circuit services network to a packet data network, the method comprising: conveying forward link voice traffic to, and receiving reverse link voice traffic from, an access terminal via the circuit services network; determining to hand off the call; in response to determining to hand off the call and while continuing to support the call, conveying, by a base station of the circuit services network to a wireless packet data node of the packet data network, a request to hand off the call to the packet data network as a Voice over Internet Protocol (VoIP) call; in response to conveying the request, receiving a confirmation from the packet data network to accept the hand-in as a VoIP call; conveying, by the base station to the access terminal, messaging that includes a packet data traffic channel, information associated with the packet data traffic channel, and a new active set for facilitating a handoff to the packet data network; acquiring the access terminal by a base station in the packet data network; and providing, by the packet data network, the access terminal with packet data services.