A METHOD AND SYSTEM FOR PROVIDING VOICE CALL CONTINUITY

摘要

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.