Interworking Between the RSW Control Criteria and SIP Standard

Various standards organizations have considered signaling for voice and video over IP from different approaches. There are currently more than one standard for signaling and control of Internet telephone calls. Some of them, which widely used are RSW control protocol and the IETF Session Initiation Protocol (SIP). Both protocols provide comparable functionality using different mechanisms and provide similar quality of service. Although there are numerous industry debates about the merits of the two protocols, the truth is that both of them, along with other complementary protocols, are necessary to provide universal access and to support IP-based enhanced services. Both protocols have been widely deployed, so interworking between RSW and SIP is essential to ensure full end-to-end connectivity. Because of the inherent differences between RSW and SIP, accommodation must be made to allow interworking between the two protocols. The work reported in this paper proposes a communication translation protocol to bridge the RSW control protocol and SIP control protocol. This communication translation protocol has to provide a set of rules to enable communications between the RSW control criteria and SIP standards. The communication translation entity defined can be called translator server.