基于NDN的移动自组织网络协助边缘缓存策略  

Assisted edge cache strategy of mobile ad hoc network based on NDN

作　　者：朱欣怡 张宇[1] ZHU Xinyi;ZHANG Yu(School of Information and Electronics,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《系统工程与电子技术》2023年第7期2227-2235,共9页Systems Engineering and Electronics

基　　金：国家自然科学基金(62073054)资助课题。

摘　　要：命名数据网络(named data network,NDN)中一些传统缓存放置策略不能高效地利用移动自组织网络中有限的缓存资源,为提高缓存空间利用率,减小数据传输时延,提出一种基于内容流行度的协助边缘缓存策略。将NDN链路状态路由协议应用于移动自组织网络中进行路由寻址,各路由器实时统计本节点处的数据流行度,结合数据流行度、位置信息以及缓存标志位信息,自主决策是否缓存数据,结果是将请求更频繁的内容缓存至更靠近用户的边缘节点。仿真实验结果表明,与传统的缓存放置策略相比,此缓存策略在缓存命中率、数据响应时延等方面有较好的提升。Although there are some traditional cache placement strategies in named data network(NDN),most of them cannot utilize the limited cache resources in the mobile ad hoc network efficiently.In order to improve the cache space utilization rate and reduce the data transmission time delay,an assisted edge cache strategy based on content popularity is proposed.In the mobile ad hoc network,NDN link state routing protocol is used for routing in mobile ad hoc network.Each of the node in the network decides whether to cache data independently,and all the popularity of the data,the location information of the node and the cache flag information are used to make the caching decision.As a result,data packets with higher popularity are pushed to edge nodes which are closer to users.The simulation experimental results show that,compared with the traditional cache placement strategy,this cache strategy has made progress in cache hit rate and data request time delay.

关 键 词：移动自组织网络 内容流行度 位置信息 协助边缘缓存 

分 类 号：TN915[电子电信—通信与信息系统]