SIP Extension and Implementation of Multimedia Communication System Based on SIP

摘要

This system adopts SIP as control signaling protocol of multimedia communication, combining the demand of multimedia communication and realizing the SIP-based multimedia communication system. This system is constructed on the basis of PC platform; the server uses Open Source Project, developed for core; Windows terminal signaling modules use GNU oSIP stacks; RTP transmission media stream uses oRTP stacks. Aiming at the support limitation of present multimedia communication, this study puts forward SIP extension methods supporting multipoint conference and proofs that the system having good expansibility and flexibility though analysis of system performance.