异构型网络通信中负载均衡选择仿真研究

摘要

Load balancing can take the full advantage of network resources and achieve dynamic network resource allocation in heterogeneous network.For the problem of load imbalance in network selection of heterogeneous environment,a heterogeneous network selection algorithm based on Analytic Hierarchy Process (AHP)-Dempster-Shafer evidence theory (DS) is proposed in the paper.This algorithm divides the factors that affect network selection into service factors and network factors.By combining the results of service factors based on AHP and real-time network factors by evidence theory,the final network selection results can be obtained.This selection process balances both user's service requirements and real-time network status,and improves the accuracy and reasonableness of the access network selection.The simulation results show that,compared with traditional algorithm,the proposed algorithm can realize better network load balance and improve the utilization of cyber source.%异构型网络通信中负载均衡可充分利用网络资源,实现动态网络资源配置.针对异构网络环境中出现的负载不均衡问题,提出一种基于AHP-DS异构网络选择算法.将影响网络选择的因素分为业务因素和网络因素,对基于业务因素的层次分析法获得的网络选择结果与根据实时网络因素获得的网络选择结果进行证据合并,获得最终网络选择结果.AHP-DS选择过程兼顾了用户业务要求和网络实时状况,提高了网络接入选择的准确性和合理性.仿真结果表明,该算法相对于传统算法能实现网络负载均衡,提高网络资源利用率.