论文部分内容阅读
为了缓解无线Mesh网络中的网络瓶颈问题,可引入内容分发技术,将Mesh路由器作为镜像服务器,以降低无线网络中的数据请求时延.针对无线Mesh网络中的内容副本分配问题,设计了更合理的网络模型,将各Mesh路由器作为M/M/1排队模型,在此基础上对问题进行形式化定义,并提出了两阶段的内容副本分配算法.在该方案中,根据各Mesh路由器收集到的内容热度信息决定每个内容对象所需的副本数量,然后通过基于贪心策略的启发式算法求解内容副本的分配方案.仿真实验的结果证明该算法较大地优化了无线Mesh网络中的平均时延,负载分布等网络性能参数.
In order to alleviate the network bottleneck in wireless Mesh network, content distribution technology can be introduced to use Mesh router as a mirror server to reduce the data request delay in wireless networks.Aiming at the problem of content copy assignment in wireless Mesh network, a more reasonable Network model, each Mesh router is regarded as M / M / 1 queuing model, on this basis, the problem is formally defined and a two-stage content copy assignment algorithm is proposed. In this scheme, according to each Mesh router The content heat information determines the number of copies required for each content object, and then uses the greedy strategy based heuristic algorithm to solve the distribution of content copies.The simulation results show that the algorithm greatly optimizes the average delay in wireless Mesh network , Load distribution and other network performance parameters.