Patent ID: 9215639
Filing Date: 2015-12-15
Classification: H04N,H04W

Abstract:
1. A method for transitioning a video call from a Long Term Evolution (LTE) network to a legacy cellular network, the method comprising: by a wireless communication device: participating in a video call with a remote communication device via a first video call session established over a connection between the wireless communication device and the Long Term Evolution (LTE) network, the first video call session comprising a packet switched video stream carried over a first bearer and a voice over LTE (VoLTE) audio stream carried over a second bearer; determining that a measured connection quality of the LTE network is less than a threshold connection quality; transitioning to the legacy cellular network having a circuit switched domain by at least dropping the connection between the wireless communication device and the LTE network and without invoking a network coordinated handover, in response to determining that the measured connection quality of the LTE network is less than the threshold connection quality; establishing a second video call session with the remote communication device on the legacy cellular network in response to transitioning to the legacy cellular network; providing an indication, via a user interface of the wireless communication device, that the video call with the remote communication device is ongoing while transitioning to the legacy cellular network and establishing the second video call session; and using the second video call session to continue the video call with the remote communication device on the legacy cellular network.