| US 7,590,092 B2 | ||
| Method and system for inter-technology handoff of a hybrid access terminal | ||
| Lewis J. Milton, Glencoe, Ill. (US); Shahab M. Sayeedi, Naperville, Ill. (US); and Xiang Xu, Jiangsu (China) | ||
| Assigned to Motorola Inc., Schaumburg, Ill. (US) | ||
| Filed on Feb. 05, 2007, as Appl. No. 11/671,013. | ||
| Claims priority of provisional application 60/809270, filed on May 30, 2006. | ||
| Prior Publication US 2007/0280264 A1, Dec. 06, 2007 | ||
| Int. Cl. H04W 4/00 (2009.01) | ||
| U.S. Cl. 370—331 [370/352; 370/401; 455/436] | 41 Claims |
| 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.
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