| 摘要 |
A gateway apparatus, a gateway method, and a program that allow interconnection between a terminal connected to a mobile circuit switched network and a terminal connected to a mobile high-speed network and can implement voice telephony between any combination of terminals. A gateway apparatus (110) performs voice communication mutually between a mobile high-speed network (140) and a mobile circuit switched network (130) via an IMS network (350). The gateway apparatus receives a packet from the mobile high-speed network (140) or from the IMS network (350), performs protocol conversion of the packet, in case the gateway apparatus decides that the protocol conversion of the packet is necessary, converts an audio compression-encoding scheme, in case the gateway apparatus decides that the conversion of the audio compression-encoding scheme is necessary, and outputs a resulting packet to the IMS network or the mobile circuit switched network. The gateway apparatus receives a circuit switching protocol from the mobile circuit switched network or a packet from the IMS network to perform protocol conversion, converts an audio compression-encoding scheme, in case the gateway apparatus decides that the conversion of the audio compression-encoding scheme is necessary, converts a resulting signal into a packet, and outputs the packet converted to the IMS network or the mobile high-speed network. |
