基于改进多属性判决的异构网络接入选择算法
发布时间：2018-10-08 20:40
【摘要】：针对现有多属性切换算法没有考虑所切换的目标网络负载、难以保障网络服务质量的不足,提出基于改进多属性判决的异构网络接入算法。首先,采用万有引力模型简化了复杂多属性判决算法的计算过程,减少了网络接入切换执行时间;其次,在切换执行前,通过加入负载判决模块计算出最优目标网络、次优目标网络负载,从而选出最终切换的目标网络。采用MATLAB和NS2等仿真工具,搭建了WLAN和UMTS融合的异构网络仿真环境。仿真结果表明,算法明显提高了整体网络的负载均衡度和资源利用率,有效降低了移动终端的切换阻塞率。
[Abstract]:Because the existing multi-attribute handoff algorithms do not consider the target network load and it is difficult to guarantee the QoS of the network, an improved multi-attribute decision based heterogeneous network access algorithm is proposed. Firstly, the calculation process of complex multi-attribute decision algorithm is simplified by using universal gravity model, and the execution time of network access handover is reduced. Secondly, the optimal target network is calculated by adding load decision module before handover execution. The suboptimal target network load is selected to select the target network that is finally switched. The heterogeneous network simulation environment of WLAN and UMTS is built by using MATLAB and NS2 simulation tools. The simulation results show that the algorithm can significantly improve the load balance and resource utilization of the whole network and effectively reduce the handoff blocking rate of the mobile terminal.
【作者单位】： 大连理工大学计算机科学与技术学院;大连大学信息工程学院;
【基金】：国家杰出青年基金(61225010) 国家基金重点项目(61432002)资助
【分类号】：TN915.6
[Abstract]:Because the existing multi-attribute handoff algorithms do not consider the target network load and it is difficult to guarantee the QoS of the network, an improved multi-attribute decision based heterogeneous network access algorithm is proposed. Firstly, the calculation process of complex multi-attribute decision algorithm is simplified by using universal gravity model, and the execution time of network access handover is reduced. Secondly, the optimal target network is calculated by adding load decision module before handover execution. The suboptimal target network load is selected to select the target network that is finally switched. The heterogeneous network simulation environment of WLAN and UMTS is built by using MATLAB and NS2 simulation tools. The simulation results show that the algorithm can significantly improve the load balance and resource utilization of the whole network and effectively reduce the handoff blocking rate of the mobile terminal.
【作者单位】： 大连理工大学计算机科学与技术学院;大连大学信息工程学院;
【基金】：国家杰出青年基金(61225010) 国家基金重点项目(61432002)资助
【分类号】：TN915.6
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