It describes the application of IMS in summary, analyzes further the service convergence, and the relation between IMS to softswitch, P2P, NASS and RACS, FMC.

• 概括地描述了IMS应用情况,并深入分析了业务融合,IMS与软交换、P2P、NASS和RACS以及FMC的关系。