Power-optimized vertical handover scheme for 4th generation heterogeneous wireless network

Minimizing the total power consumption required for vertical handovers in 4th generation heterogeneous wireless networks is as important as providing users with the best QoS(Quality of Service) continuously. This letter proposes a vertical handover scheme to minimize the total power consumption required for a vertical handover in 4th generation heterogeneous wireless networks, while guaranteeing a particular QoS. The proposed scheme is based on an updated Tabu-search scheme, which helps to efficiently explore the network in order to find an optimal solution and to provide a service performance that adheres to predefined service level agreements (SLA). Simulation results show that the proposed scheme can lead to lower total power consumption compared to the RSS (Received Signal Strength) based scheme. The proposed method can achieve promising results in terms of bandwidth, security and cost of service, while minimizing the power consumption.