Abstract:

Multi-objective decision making based access selection algorithm was proposed to work out the problem that the judging factors of the maximum load balance based access selection algorithm were one-sided in heterogeneous wireless networks.On the basis of satisfying the multifactor judgment and dynamic applicability,five-grade scale method and entropy of information method were adopted to calculate the subjective and objective weight.Meanwhile,least squares method was used to choose them eclectically.Both the network state and user preferences were taken into consideration in order to improve the accuracy and practicability of the algorithm.Simulation results show that compared to the maximum load balance based algorithm,the proposed algorithm can decrease the packet blocking probability and packet loss rate,as well as improve the user satisfaction.

Key words: communication, multi-objective decision making, least squares method, information entropy