| 摘要: |
| 为了提高内容中心移动边缘网络的缓存性能，提出了一种基于用户移动性感知和节点中心性度量的内容中心移动边缘网络缓存机制（user mobility-aware and node centrality based caching，简称UMANCC）.UMANCC机制利用边缘节点计算节点中心性、缓存空闲率以及小区内用户逗留时间.移动边缘网络控制器综合各边缘节点的信息，计算各边缘节点的重要性并进行排序，最后根据排序结果选择内容缓存节点.仿真实验结果表明：与传统缓存机制LCE及Prob相比，UMANCC有效减少用户获取内容的平均跳数高达15.9%，提高边缘节点缓存命中率至少13.7%，减少进入核心网流量高达32.1%，有效地提高了内容中心移动边缘网络的内容分发性能. |
| 关键词: 内容中心网络 移动边缘网络 缓存 移动性感知 节点中心性 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金（61301119）；教育部留学归国人员启动基金（1020607820140002） |
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| User Mobility-Aware Caching Mechanism in Content-Centric Mobile Edge Networks |
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CAI Yue-Ping, CHEN Wen-Xin, FAN Xin-Wei, LUO Sen, QIU Ya, TAN Bing
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College of Communication Engineering, Chongqing University, Chongqing 400030, China
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| Abstract: |
| To improve the cache performance of content-centric mobile edge networks, a user mobility-aware and node centrality based caching mechanism, UMANCC, is proposed. UMANCC utilizes edge nodes to calculate the node centrality, idle rate of cache and cell sojourn time of users. A mobile edge network controller collects aforementioned information of edge nodes, and ranks each node base on the calculated importance factor of nodes. The caching node is selected according to the ranking result. Simulation results show that compared with the traditional caching mechanisms such as LCE and Prob, UMANCC effectively reduces the average number of hop count of fetching contents by up to 15.9%; it improves the hit ratio of cache at edge nodes by at least 13.7%, and it reduces traffic flowing into core networks by up to 32.1%. It greatly improves the performance of content distribution in content-centric mobile edge networks. |
| Key words: content-centric networking mobile edge network caching mobility aware node centrality |
