The Research on Group Calling Based on SIP Protocol
YU Yong-jia · Journal of Changzhou Vocational College of Information Technology · 2011
SIP is the session initiation protocol in application layer,it was developed by the IETF.This paper introduces the SIP sequence of simple IP calling.Then based on the real requirement of IP Group calling,analyses different conditions of group calling,gives the realization of IP Group Calling's SIP sequence and status controlling method.