| 摘要 |
Method for supporting network based mobility for a mobile terminal in an IMS (IP Multimedia Subsystem) architecture, wherein the mobile terminal is connected to a femto cell or to a macro cell—source cell—and wherein handover of an actual session of the mobile terminal is performed to another femto cell or macro cell—target cell—, wherein the femto cells and the macro cells are provided with an eMSC-server (Mobile Switching Center Server enhanced for IMS Centralized Services) function, and wherein the source cell's eMSC-server function hosts a source user agent and the target cell's eMSC-server function hosts a target user agent, is characterized in that the source user agent contacts the target user agent directly or indirectly prior to executing the actual handover, and wherein the source user agent prepares the target user agent together with the corresponding access network by exchanging handover related information.
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