Patent ID: 7260399

Claim:
A method for handing off a wireless communication session between radio networks, the method comprising: handing off the wireless communication session from a first radio network of a first type to a second radio network of a second type based on a first trigger; and handing off the wireless communication session from the second radio network to one of the first radio network and a third radio network of the first type based on a second trigger, wherein the second trigger is different than the first trigger, wherein the first trigger is selected from the group consisting of (i) threshold round-trip signal delay and (ii) threshold received signal strength, wherein the second trigger is threshold geographic location, wherein handing off the wireless communication session from the first radio network to the second radio network comprises employing a trigger that is based on one of (i) a comparison of a first signal strength for signals communicated between a mobile communication device associated with the wireless communication session and a radio interface device of the first radio network and a second signal strength for signals communicated between the mobile communication device and a radio interface device of the second radio network (ii) a round trip delay for signals communicated between the mobile communication device and the radio interface device of the first radio network, and wherein handing off the wireless communication session from the second radio network to one of the first radio network and the third radio network comprises employing a trigger that is based on a geographic position of a mobile communication device associated with the wireless communication session.