Invention Grant
US07885234B2 Method and system for providing voice call continuity 有权
提供语音通话连续性的方法和系统

Method and system for providing voice call continuity
Abstract:
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.
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