A new approach for optimized vertical handover in NGWN

One of the challenging issues in Next Generation Wireless Network (NGWN) is achieving seamless Vertical Handover (VHO) while roaming between different technologies such as Wireless Fidelity (Wi-Fi), Worldwide Interoperability for Microwave Access (WiMAX), Universal Mobile Telecommunications System (UMTS) and Long Term Evolution (LTE). For that the telecommunication operators will be required to develop a strategy for interoperability of these different types of existing network to give the best connection anywhere anytime for the Mobile Users (MUs). To full these requirements we propose a new VHO approach that based on loose coupling internetworking in conjunction with Mobile IPv4 (MIPv4) under Media Independent Handover (MIH). Our objective is develop a strategy for interoperability of different technologies and optimized the VHO decision. Our proposed approach provides more exhaustive, high accurate and better performance compared with the approaches proposed in the literature.