Performance Evaluation of QoS in WLAN-UMTS Network Using OPNET Modeller

Seamless connectivity is need of next generation wireless network (NGWN). WLAN, WiMAX and UMTS are the main components of wireless network connected in integrated manner. These networks, each with its own characteristics, connected to a common IP-based core network to provide mobile user with seamless connectivity. One of the major issues for the converged heterogeneous networks is to provide seamless connectivity with QoS support. In this paper we integrated WLAN and UMTS network and evaluated QoS parameters for Video Conferencing and FTP applications.