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为解决在异构网络环境选择最佳的接入网络问题,提出一种结合综合赋权的异构网络选择算法。在用户端采用层次分析法判断用户偏好,在网络端采用基于指标相关性的客观赋权法判断网络客观状态,并结合基于离差极小化的综合赋权法得到最终权重,同时运用理想值近似排序法进行网络排序,接入最佳网络。基于Matlab的仿真结果表明,该方法能根据不同业务结合网络性能及用户需求选择最佳的接入网络,减少了频繁切换,提高了网络选择结果的合理性与有效性。
To solve the problem of choosing the best access network in heterogeneous network environment, a heterogeneous network selection algorithm combined with comprehensive weighting is proposed. At the client side, the analytic hierarchy process is used to judge the user’s preference. The objective of the network is judged by the objective weighting method based on the relevance of the indicators at the network end, and the final weight is obtained by using the comprehensive weighting method based on minimization of discrepancy. At the same time, Approximate sorting method for network sorting, access to the best network. The simulation results based on Matlab show that this method can select the best access network according to the different business combined with the network performance and user needs, reduce frequent handovers and improve the rationality and effectiveness of network selection results.