294 results about "Voice call continuity" patented technology

The invention discloses a switching method and a switching device, which belong to the field of communication. The switching method comprises the following steps of: receiving indication information from a mobile management entity (MME), wherein the indication information is used for indicating whether a network side and a terminal support enhanced circuit system fallback (CSFB) to a 1x network or not; if the network side and the terminal support the enhanced CSFB, determining to execute the enhanced CSFB to the 1x network and switching operation to a high rate packet data (HRPD) network and transmitting a first message to the terminal so as to trigger the terminal to perform the enhanced CSFB to the 1x network and the switching operation to the HRPD network; and if the network side and / or the terminal do not support the enhanced CSFB to the 1x network, initiating the common CSFB or ending up the process. The method has the advantages of realizing that user equipment (UE) can continue to use packet system (PS) data service in the process of generating 1x radio transmission technology (RTT) CSFB or performing single radio voice call continuity (SRVCC), shortening the switching time and providing good client experience for a client.

A method and system for providing circuit-switched to IP Multimedia Subsystem voice call continuity with a single radio are provided. The exemplary embodiment takes advantage of a standard RANAP signaling procedure called “directed retry” to perform a much better coordination between the change in radio mode and the transfer of the media path. With the use of “directed retry”, the transfer of the media path does not begin until the handover procedure is complete, thus significantly reducing the likely amount of media disruption.