Patent ID: 8599774

Claim:
A network switching method for mobile multimedia services, the method comprising: sending a Real Time Streaming Protocol (RTSP) DESCRIBE request to an acquiring point that provides media stream data in a second network, and acquiring a Session Description Protocol (SDP) description file; sending an RTSP session SETUP request according to the description file to the acquiring point; and sending an RTSP session PAUSE request to the acquiring point after receiving an RTSP session SETUP response message; setting a first preset value, wherein time for which the signal strength of media stream data of a first network attenuates from the first preset value to such a value that the first network is unavailable is equal to or longer than a sum of time required for establishing a unicast connection with a Streaming Media (SM) server plus time required for buffering the media stream data of the second network until the media stream data of the second network is capable of being decoded and played; detecting signal strength of media stream data of the first network, and when the signal strength of the media stream data of the first network is smaller than the first preset value, sending an RTSP session PLAY request and receiving the media stream data of the second network in parallel with the media stream data of the first network, wherein the first network is a terrestrial digital broadcast network, and the second network is a mobile communication network; and buffering the media stream data of the second network, when the media stream data of the second network is buffered to such an extent that the media stream data of the second network is capable of being decoded, terminating receiving and playing of the media stream data of the first network, and decoding the buffered media stream data of the second network, and playing the decoded media stream data of the second network.