Game theoretic and weighted ranking Approaches for seamless Vertical handover in 4g Heterogeneous networks

Abstract

Fourth Generation 4G or Next Generation Wireless Networks newline NGWN enables the integration and interworking of current wireless newlineSystems With 4G NGWNs user demands various levels of broadband newlineservices voice data and multimedia across different wireless networks and newlineoperators for seamless roaming at vehicular speeds The process of automatic newlineswitching across different networks without any interruption is known as newlinevertical handover The existing system lacks standard handover interfaces and newlinescalability I e it does not provide seamless roaming across different newlineoperators and different networks Therefore it has limited QoS during newlineheterogeneous handover It is inefficient and impractical to consider received newlinesignal strength RSS as the sole criterion for heterogeneous handover So newlinemore complex metrics like momentary cost bandwidth power consumption newlinenetwork conditions and user preferences are also considered for vertical newlinehandover decision newlineAlthough the existing network selection mechanisms ensure the newlinemaximal user s Quality of Experience QoE by taking into account of user s newlinepreferences and network conditions the multi dimensional decision problem newlineis not addressed in the existing system newline newline