The current researches are moving towards more development in order to provide the
growing the needs of users such as support real-time applications, quality of service,
particularly; the high data rate transfer and other. That prompts the network
service
providers to integrate many properties for different networks resource, and support
providing the service "anywhere and anytime".
Hence, the importance of this research, which aims to study the vertical handover as
very important and necessary step to provide the mobility of mobile nodes between the
different networks by using Media Independent Handover (MIH) IEEE802.21standard
which is developed in January 2009. In this paper, the performance of vertical handover
between these two networks is evaluated taking into account many parameters such as
packet loss, handover latency, and throughput, using NS2 simulator (Network Simulator
version2) which includes a support for MIH technology by the National Institute of
Standard and Technology (NIST).