| 摘要 |
<p>A system and method for allowing legacy circuit switched user equipment (CS UE) to operate via a packet-switch system, such as an IP Multimedia Subsystem (IMS) system, is provided. The mobility and session contro l aspects of communications with a legacy CS UE is separated. A user agent is pl aced in the receiving node (e.g., a home node B) that acts as the SIP agent for the CS UE fo r session control. An interworking function is provided to allow mobility between the macro CS network and the PS (e.g., IMS) network.</p> |
