Patent ID: 9307466
Filing Date: 2016-04-05
CPC Classification: H04W

Claim Text:
1. A telecommunications device operable to perform in-call handoff between cellular and packet-switched networks, the telecommunications device comprising: a circuit-switched interface connecting the telecommunications device with a circuit-switched network; a packet-switched network interface connecting the telecommunications device with a packet-switched network; and a processor receiving a request from a multi-mode device to transfer an existing call that was made by the multi-mode device over a cellular network to a remote party using a cellular interface of the multi-mode device to a call that is between the multimode device and the remote party over the packet switched network using a packet interface of the multi-mode device, wherein the existing call was established in the cellular network without using the telecommunications device, and wherein the request is sent using a public service identity of the telecommunications device; in response to receiving the request, the processor establishes a first call leg in the packet-switched network between the telecommunications device and the multi-mode device via the packet-switched interface, establishes a second call leg between the telecommunications device and the remote party via the circuit-switched interface; and transfers the call from the cellular network to the telecommunications device such that the call between the multi-mode device and the remote party uses the first and second call legs.