Service control apparatus, relay apparatus, femtocell base station, communication system, control method and program

摘要

In order to enable a communication system introduced with a femtocell base station using an IMS network, to perform PS service similar to that of the existing 3G network, a service control apparatus (SGSN functional unit), based on the UE's message transmitted to the femtocell base station (FAP), acquires UE's subscriber information for PS (Packet Switching) service, from a HLR and registers the subscriber information in a VLR that is present on the IMS network. Then, service control apparatus performs PS service based on the subscriber information registered in the VLR.