Date Added: Mar 2011
Wireless technologies have evolved very rapidly in recent years. In the future, operators will need to enable users to use communication services independently of access technologies, so they will have to support seamless handovers in heterogeneous networks. In this paper, the authors focus on building the simulation model for testing advanced handover procedures. Simulation model based on real operator network measurements was presented, verified and validated. In addition, advanced procedure for SIP based seamless handover in heterogeneous network using congestion detection was described. Its performance was evaluated using the described simulation model.