Patent ID: 9001715
Filing Date: 2015-04-07
Classification: H04L,H04M,H04W

Abstract:
1. A gateway apparatus arranged between a mobile circuit switched network and a mobile IMS (IP Multimedia Subsystem) network, the apparatus comprising: a call control unit that converts a control signal received from the mobile circuit switched network and outputs a signal converted to the mobile IMS network; and a conversion unit that checks a plurality of types of a network to perform protocol conversion of a line switching protocol for an audio signal received from a communication terminal on the mobile circuit switched network side, and makes a decision on a type of a network beyond the mobile IMS network from among the plurality of types, or on a type of a partner terminal which is a connection target, using control information output from the mobile IMS network and received by the call control unit, and that performs, based on a result of the decision, protocol conversion of the line switching protocol for the audio signal received from the communication terminal on the mobile circuit switched network side and outputs a protocol converted signal to the mobile IMS network.