Patent ID: 8625541

Claim:
A seamless session switching method used in a VOIP session, comprising: a first mobile terminal establishing a first VOIP session with a second terminal via an initial wireless network; the first mobile terminal acquiring a target wireless network when the first mobile terminal detects that a switching event occurs; the first terminal transmitting a second session request to the second terminal via the target wireless network, and keeping the first VOIP session continued; the first mobile terminal establishing a second VOIP session with the second terminal via the target wireless network after receiving an acknowledge message for the second session request from the second terminal, and terminating the first VOIP session after the second VOIP session is established; the first mobile terminal transmitting test information to wireless networks, determining and recording status information of the wireless networks supported by the first mobile terminal according to feedback information, and updating a network list; and the first mobile terminal acquiring the target wireless network according to the status information of the wireless networks in the network list; wherein the wireless networks establish priority levels according to preset parameters, and the target wireless network acquired by the first mobile terminal is the wireless network with the highest priority level in the network list.