异构无线网络中基于信任度的接入选择算法

针对异构无线网络不确定性的特点，提出一种基于信任度的接入选择算法。引入直接信任度、推荐信任度、推荐主体可信度和信任时间戳4个参量计算网络的信任度，利用信任度对网络性能指标进行信任加权。同时，综合考虑用户个人偏好，对网络进行逼近理想解排序，得到最佳接入网络。仿真实验结果表明，该方法综合考虑了网络多种性能指标及其信任度，能提高异构无线网络中用户选择网络的安全性。

Access Selection Algorithm Based on Trustworthiness in Heterogeneous Wireless Network

Aiming at the characteristics of uncertainty in heterogeneous wireless network, this paper proposes an access selection algorithm based on trustworthiness. It incorporates direct trust, recommendation trust, recommender credibility and time stamp for evaluating the trustworthiness of the network. Trustworthiness is used to weight the network attributes. Taking user＇s demands in consideration, the best access network can be attained with the Technique for Order Preference by Similarity to Ideal Solution（TOPSIS）. Simulation results show the algorithm can improve the accuracy of access selection for multi-mode terminals while balancing multiple decision criteria and the trustworthiness of the network.