计算机科学 ›› 2015, Vol. 42 ›› Issue (6): 120-124.doi: 10.11896/j.issn.1002-137X.2015.06.027
张钰,刘胜美
ZHANG Yu and LIU Sheng-mei
摘要: 异构网络中,针对如何根据不同业务的特性选择合适的判决参数并利用这些参数来选择最适合的网络以及通过网络负载均衡来减少切换次数和切换失败可能性等问题,提出了一种基于多属性判决的网络选择算法——TAU-MADM算法。考虑到网络客观属性和用户偏好,进行两次判决:第一次判决采用TOPSIS算法,仅考虑网络客观属性,当备选网络方案相当接近时进行第二次判决;第二次判决采用AHP算法计算权重,并采用ANP网络分析法消除属性之间的依赖性,之后构造效用函数,根据每个网络的效用函数值进行网络选择。仿真结果表明,该算法考虑了网络负载均衡,有效地降低了平均切换率和平均切换阻塞率。
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