COMMUNICATION SYSTEM, FEMTO BASE STATION, CALL STATUS CONTROL SERVER, HOME SUBSCRIBER SERVER, COMMUNICATION METHOD AND PROGRAM

摘要

A communication system, which is connected to a public communication network including a communication device (14) of an emergency agency, comprises a femto base station (2) for wireless connecting to a wireless terminal (1). The femto base station (2) includes a first communication control unit that, upon reception of a call from the wireless terminal (1), inserts a first positional information, which is information to be used to locate the femto base station (2) or a set of base stations including the femto base station (2), into a SIP message and then transmits the SIP message to another device so as to notify the first positional information to the communication device (14) of the emergency agency.