异构无线网络终端服务感知的动态负载均衡机制  

Dynamic Load Balance Mechanism Based on Mobile Terminal Service-aware in Integrated Heterogeneous Wireless Networks

作　　者：罗俊辉[1] 白光伟[1,2] 沈航[2] 曹磊[3] 

机构地区：[1]南京工业大学计算机科学与技术系,南京210009 [2]南京理工大学高维信息智能感知与系统教育部重点实验室,南京210094 [3]南京大学计算机软件新技术国家重点实验室,南京210093

出　　处：《计算机科学》2014年第6期37-42,共6页Computer Science

基　　金：国家自然科学基金项目(60673185;61073197);江苏省自然科学基金项目(BK2010548);江苏省科技支撑计划(工业)项目(BE2011186);江苏省普通高校研究生科研创新计划项目(CXLX11_0262;CXZZ12_0425);江苏省六大高峰人才基金资助项目;南京大学计算机软件新技术国家重点实验室开放课题(KFKT2010B08)资助

摘　　要：异构无线网络负载均衡是提高网络服务质量的关键技术之一。现有负载均衡机制大多没有考虑用户的个性化业务在请求网络资源时存在的差异,同时缺乏一种用户满意度保障机制。针对这一问题,提出一种终端服务感知的动态负载预先均衡机制。首先,采用模糊数学的推理方法,计算出终端对各个候选网络的接入期望值。在此基础上,充分考虑各候选网络的资源拥塞状况,有选择性地将该终端用户业务链接切换到低资源拥塞率、高接入期望值网络中,从而缓解网络中的局部热点,提高网络资源有效利用率与用户满意度。仿真结果表明,该机制能够显著均衡网络中各个无线接入点的工作负荷,有效减少拥塞发生的概率,改善用户的网络体验。Load balance in heterogeneous wireless networks is one of the key technologies to enhance service quality of networks.Most existing load balance mechanisms do not take the difference of personalized business demand of users for network resources into account,and moreover,lack a satisfaction guarantees mechanism.To address this problem,a novel dynamic load balance in advance mechanism based on end-user service awareness was proposed.At first,a fuzzy mathematics model was introduced to achieve access expectations with respect to each candidate network of terminal.On this basis,the services of mobile end-user in current network could be transferred to low resources congestion rate and high exceptions access network selectively,in full consideration of the congestion status of these candidate network resources,such that local hot-spots could be alleviated,as a result to enhance the resource utilization efficiency and improve user satisfactions.Simulations demonstrate that the proposed mechanism achieves significant performance improvement,in terms of access point load,as well as congestion avoidance and user network experiences.

关 键 词：移动互联网络 异构网络切换 动态负载均衡 松耦合模式 模糊数学 

分 类 号：TP393.03[自动化与计算机技术—计算机应用技术]