Patent ID: 9609494
Date: 2017-03-28
CPC Classifications: H04L,H04M,H04W

Claim:
1. A gateway system making up a communication system provided with a function of providing a predetermined supplementary service, comprising: first determining means for determining, upon receiving a SIP (Session Initiation Protocol) message, whether the message is to be transmitted to a core apparatus included in a core network of the communication system or to be transmitted to an apparatus not included in the core network; and transmitting means for transmitting contents of the SIP message, determined by the first determining means to be transmitted to the core apparatus, to the core apparatus, wherein based on whether a BODY section of a received SIP message includes the first information indicating supplementary service control or information indicating an SMS (Short Message Service), the first determining means determines that the SIP message is to be transmitted to the core apparatus when the first information is included and determines that the SIP message is to be transmitted to an apparatus not included in the core network when the information indicating the SMS is included.