【摘要】 针对异构网络融合环境下的网络选择不能仅依靠物理信号强度的特点,利用多属性决策理论提出了一种异构网络选择算法。该算法考虑业务要求、用户喜好以及网络差异,通过层次分析法和熵值法确定网络属性的权重,并由此计算可得网络性能,选出最优网络。仿真结果表明,此算法可以准确选择接入网络,并当用户在网络边缘做兵乓运动时有效减小切换次数,降低丢包率。更多还原

【Abstract】 The selection of access network in heterogeneous network environment can not only be based on physical signal intensity,so a network selection algorithm based on multi-attribute decision making is proposed.With traffic requirements,preference of user and difference of available networks considered,the algorithm calculates the weights of network attributes using analytic hierarchy process and entropy theory.Then,the performance of each available network is counted,based on which the optimum network is selected.Simulation results show that the algorithm performs well in network selection,and reduces the number of handover times and the packet loss probability as the user moves through the network boundary frequently.更多还原