Patent ID: 9014089
Filing Date: 2015-04-21
Classification: H04L,H04M,H04W

Abstract:
1. A management apparatus managing information about a communication terminal existing in an IMS (IP Multimedia Subsystem) network, comprising: a control circuit which, when accepting an establishment request for establishing an information communication path between a sending-side communication terminal and a receiving-side communication terminal, performs control so as to establish the information communication path between the sending-side communication terminal and the receiving-side communication terminal via a relay apparatus provided with a relay function for relaying communication between the IMS network and a 3G network, and provided with a communication interception function, and via the 3G network if the receiving-side communication terminal exists in the IMS network and is a communication interception target terminal, wherein the relay apparatus is an MGCF (Media Gateway Control Function) that may communicate with a CSCF (Call Session Control Function) using an ISUP (ISDN User Part) protocol; and a communication circuit that transmits/receives a message, wherein when accepting the establishment request from a sending-side control apparatus which controls communication of the sending-side communication terminal, the control circuit transmits a response indicating that the receiving-side communication terminal does not exist in the IMS network, to the sending-side control apparatus, and performs control so that the establishment request is notified to the management apparatus via the relay apparatus and the 3G network if the receiving-side communication terminal exists in the IMS network and is a communication interception target terminal.