一种改进的基于代价函数的垂直切换算法

An Improved Vertical Handoff Algorithm Based on Cost Function

针对目前有一些切换算法没有综合考虑多种属性以及多种属性的权重对代价函数产生的影响,导致切换性能不理想的问题,提出一种改进的基于代价函数的垂直切换算法。该算法采用层次分析法来确定多种属性之间的权重关系,构造比较判决矩阵并检验其一致性切换判决,然后利用切换判决代价函数进行垂直切换的判决。实验结果表明提出的算法能够综合考虑各属性间关系,从而获得良好的切换性能。

Currently, some handoff algorithms fail to overall consider multiple attributes and the weight of multiple attributes impose impacts on cost function. Thus, handoff performance is not ideal. Aiming at these problems, this paper proposes an improved vertical handoff algorithm based on the cost function. The algorithm adopts the analytic hierarchy process （AHP） to confirm the weight relations among multiple attributes. It constructs comparative judgment matrix and tests consistency handover decision, and uses the cost function to complete the judgment of vertical handover. The results show that the algorithm proposed comprehensively considers the relationship between the attributes and reaches good switching performance.