Method for transmitting SMS for VoIP service supporting Multi-protocol

In this paper, we propose the method for transmitting the SMS (Short Message Service) message for the VoIP (Voice over IP) service supporting multi-protocol. The multi-protocol VoIP under consideration are generally composed of H. 323, SIP and MGCP and Most ITSPs (Internet Telephony Service Provider) provide VoIP service with H.323 and SIP now. SMS is killer application in mobile telecom service and many people of various fields use that service. For example, user can send many SMS messages and substitute e-mail. Also SMS can be provided with various internet applications. Ahn, the value added service legacy phone of KT (Korea Telecommunication), can use SMS. Therefore VoIP phone also can be required with the same requirement. With the multi-protocol VoIP we will propose several methods sending efficiently SMS. To show the validity of the proposed method some examples are given in which the results can be expected by intuitive observation