基于SDN的无线网状网络缓存位置决策和操作分配方案

发布时间：2018-11-20 14:44

【摘要】：针对信息中心网络缓存管理效率较低的问题,提出一种旨在提高缓存管理效率的方法,且充分利用了无线网状网络(WMN)环境中软件定义网络(SDN)的概念。主要工作体现在SDN内容管理上,缓存位置决策考虑了网络拓扑位置、内容尺寸和缓存节点资源的位置。缓存操作考虑了请求客户端和缓存节点位置,且操作分为通过分支点的off-path缓存和通过缓存节点内容流的on-path缓存。控制器通过缓存内容表来确定工作的分配。实验在两种环境下进行:含有局部聚合客户端的小型网络和局部分布式客户端的大型网络。结果显示,所提方案仅利用每秒5.13kb的控制流量负荷即可将随机缓存位置方案的平均响应延迟减少23.95%。相比于其他网络缓存方案,所提方案最大化了WMN的节点缓存效率,明显提升了内容缓存分配性能,且系统没有较大的额外开销。
[Abstract]:Aiming at the low efficiency of cache management in information center network, a method is proposed to improve the efficiency of cache management, and the concept of software defined network (SDN) in wireless mesh network (WMN) environment is fully utilized. The main work is SDN content management, cache location decision takes into account the network topology location, content size and cache node resource location. The cache operation considers the location of the requesting client and the cache node, and the operation is divided into two categories: the off-path cache via the branch point and the on-path cache via the cache node content stream. The controller determines the assignment of work by caching the content table. The experiment is carried out in two environments: a small network with a local aggregate client and a large network with a local distributed client. The results show that the proposed scheme can reduce the average response delay of the random cache location scheme by 23.95% only using the control flow load of 5.13kb per second. Compared with other network caching schemes, the proposed scheme maximizes the node cache efficiency of WMN, improves the performance of content cache allocation, and has no additional overhead.
【作者单位】：四川省装备制造业机器人应用技术工程实验室;西北大学可视化研究所;南京航空航天大学机电工程学院;
【基金】：河南省科技厅科技发展计划科技攻关项目(122400450356);河南省科技厅科技发展计划软科学项目(132400410927)资助
【分类号】：TN915.02

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