A Cooperative Caching Scheme Based on Mobility Prediction in Vehicular Content Centric Networks
A Cooperative Caching Scheme Based on Mobility Prediction in Vehicular Content Centric Networks
复制标题
车辆内容中心网络中基于移动预测的协作缓存方案
DOI：
10.1109/tvt.2017.2784562
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发表时间：
2018-06-01
影响因子：
6.8
通讯作者：
Wu, Guowei
中科院分区：
文献类型：
--
作者：
Yao, Lin;Chen, Ailun;Wu, Guowei
车载内容中心网络（VCCN）成为车载通信中信息丰富应用的有力候选者。由于车辆的移动性，在VCCN中建立端到端连接变得相当低效。因此，内容分组通常经由VCCN中的不同路径被发送回请求节点。为了提高VCCN的网络性能，节点的移动性应被利用的车辆作为中继和携带数据交付。在本文中，我们提出了一个计划，称为基于移动性预测（CCMP）的VCCN的合作缓存。CCMP的主要思想是在一组可能重复访问同一热点区域的移动的节点上缓存流行内容。在我们的CCMP方案中，我们使用基于部分匹配的预测来预测移动的节点根据其过去的轨迹到达不同热点区域的概率。在热点区域停留时间较长的车辆可以提供更多的服务，应该优先作为缓存节点。为了解决每个节点的缓冲区有限的问题，我们设计了一个基于内容流行度的缓存替换，以保证只有流行的内容被缓存。我们评估CCMP通过机会网络环境模拟器的显着特点，成功率和内容访问延迟相比，其他国家的最先进的计划。
Vehicular content centric networks (VCCNs) emerge as a strong candidate to be deployed in information-rich applications of vehicular communications. Due to vehicles' mobility, it becomes rather inefficient to establish end-to-end connections in VCCNs. Consequently, content packets are usually sent back to the requesting node via different paths in VCCNs. To improve network performance of VCCNs, node mobility should be exploited for vehicles to serve as relays and to carry data for delivery. In this paper, we propose a scheme called cooperative caching based on mobility prediction (CCMP) for VCCNs. The main idea of CCMP is to cache popular contents at a set of mobile nodes that may visit the same hot spot areas repeatedly. In our CCMP scheme, we use prediction based on partial matching to predict mobile nodes' probability of reaching different hot spot regions based on their past trajectories. Vehicles with longer sojourn time in a hot region can provide more services and should be preferred as caching nodes. To solve the problem of limited buffer at each node, we design a cache replacement based on content popularity to guarantee that only popular contents are cached. We evaluate CCMP through the opportunistic network environment simulator for its salient features in success ratio and content access delay compared to other state-of-the-art schemes.