Cross-Domain trust mechanism in IMS
HU Jin-ping · Computer Engineering and Applications Journal · 2008
Analyzed the authorization mechanism of media layer,control layer and application layer in IMS.To the problem of overhead of Cross-Domain authorization when UE roaming in IMS,proposed a Cross-Domain trust mechanism of the control layer in IMS.The Cross-Domain trust mechanism added four functional modules which are trust certificate database,certificate directory, assertion generator and tag extractor.The trust mechanism realized the single-authorization strategy to UE,and reduced the cost of repeat authorization.Using Open SER realized the function of each entity in IMS and built a simple simulation network,and then did simulation of Cross-Domain trust mechanism in the network.The simulation result shows that the Cross-Domain trust mecha- nism reduces 0.417 7 s of time cost.