The next generation wireless networks (NGWN) should be compatible with other communication technologies to offer the best connectivity to the mobile terminal, which can access any IP based services at any time from any network without the knowledge of its user. It requires an intelligent vertical handover decision making algorithm to migrate between technologies that enable seamless mobility, redundant best connection and minimal terminal power consumption. Currently existing decision engines are simple, proprietary, and its handover is only based on the received signal strength which has...