紧急救治场景下异构无线网络终端网络选择机制的研究

For the specific requirements of emergency communication over heterogeneous wireless networks, considering the terminal must have the ability to adaptively access networks, this paper puts forward a new network selection mechanism and using the fuzzy analytic hierarchy process to design the network selection algorithm which considering the terminal characteristics (velocity, RF power consumption), network performance parameters (throughput, QoS related and etc.) and traffic-types together. Using TFNs to represent the membership function of relative importance of each pairwise argument, weights are reasonably assigned to each parameter. The best access network is which has the highest weighted sum of normalized argument values. The validity and accuracy of the algorithm was confirmed by the simulation.