Patent ID: 8737387

Claim:
A gateway for connecting a call control network for performing call control and a terminal having no call control function to relay communication between the call control network and the terminal, the gateway comprising: circuitry configured to: substitutively perform call control processing in call control communication, using Real-time Transport Protocol (RTP) and RTP Control Protocol (RTCP), that is communication performed by the terminal by way of the call control network, and reporting a band required by the call control communication to the call control network; determine an updated value of the band of the call control communication based on a communication packet in the call control communication, received from the terminal; perform packet analysis by extracting predetermined information included in the communication packet, the information including a packet loss rate included in a Receiver Report packet or a Sender Report packet; and report the updated value to the call control network as an updated band required by the call control communication, wherein the determining the updated value based on the information is such that the updated value is greater than the reported band when the packet loss rate is greater than a predetermined upper limit threshold value.