End of Tend Quality of Service in SIP Session

Abstract

The Session Initiation Protocol (SIP), standardized by the IETF, allows participants to establish a session for delivering multimedia streams such as audio and video. However, when it comes to mobile environment, SIP fails to offer seamless real-time multimedia service due to significant handoff delay caused by IP address allocation and session re-establishment. A common disadvantage of the existing approaches is that they require additional network components or considerable interventions of network administrators. In this thesis, we propose a fast handoff mechanism for SIP, which employs the cross-layer inter-working technique to reduce the handoff delay. The proposed mechanism, called Fast Handoff for SIP. Experimental results from simulation modeling of fast handoff mechanism for SIP show that this model can support the real-time multimedia services in wireless/mobile networks with only few modifications to existing networks. OMNeT++ simulator was used in this research to simulate a network comprising one main server and a number of mobile phones connected to it. The performance of the network in different locations was studied and analyzed.