A Novel Network Selection Algorithm of Service-Based Dynamic Weight Setting

In the future mobile systems, various wireless access technologies will exist simultaneously and constitute a complicated heterogeneous networks environment. Considering the users´ services satisfaction, a novel network selection algorithm based on dynamic weight setting is proposed in order to solve the existing problems that there is not a tradeoff between users´ preferences and network conditions, and without only considers single handoff parameter in the present handoff decision schemes, a possibility-based uncertainly Multi-Attribute Decision Making (UMADM) method is used for handoff cost function. The network selections adopt Always most Suitable Connection (ASC) principle in order to utilize the wireless sources efficiently. Simulation results show that the proposed algorithm is favorable to improve the whole QoS performance of services, and enhance the cost-effective of the selected networks.