Vertical Handover between WiMAX and UMTS performance analysis رسالة ماجستير

Abstract

Smart mobile communication systems are embedded with advanced computing aspects and equipped with multiple network interfaces to support different kinds of wireless technologies. However, WiMAX and UMTS technologies are heterogeneous networks and the traffic redirection between them are called a vertical handover process. Recently the IEEE 802.21 enhanced the vertical handover process and enable seamless mobility between the wireless access networks. In this research, the traffic redirection from the WiMAX to UMTS networks with the existence of the IEEE 802.21 standard. A performance comparison is done based on many application data rates and different speeds of the mobile node the effect of mobile speed on the performance is also monitored in three different scenarios. The network performance indicators are measured throughput, packet loss, delay, and handover latency. Comparing the results with the ITU-T recommended values helps us to define an acceptable threshold to insure the quality of service for different applications that run on the mobile node and the media server which is represented in our topology as a service provider. Finally, the results should be close to the reality in our scenarios as we considered the existence of the 802.21 IEEE standard which takes the received signal strength as decision maker whether to do the handover or not.