Cooperative Caching in Vehicular Content Centric Network Based on Social Attributes and Mobility
Cooperative Caching in Vehicular Content Centric Network Based on Social Attributes and Mobility
复制标题
基于社交属性和移动性的车载内容中心网络中的协作缓存
DOI：
10.1109/tmc.2019.2944829
复制
发表时间：
2021-02-01
影响因子：
7.9
通讯作者：
Wu, Guowei
中科院分区：
文献类型：
--
作者：
Yao, Lin;Wang, Yuqi;Wu, Guowei
Communications in vehicular ad-hoc network (VANET) are subject to performance degradation as results of channel fading and intermittent network connectivity. The emerging Vehicular Content Centric Network (VCCN) is promising in supporting the needs of contents and alleviating the communication problems in VANET. Specifically, to improve the cache hit ratio and reduce the access delay of content retrieval, it helps to choose the appropriate vehicles to cache the frequently accessed data items. In this paper, we propose a Cooperative Caching scheme based on Social Attributes and Mobility Prediction (CCSAMP) for VCCN. CCSAMP is based on the observation that vehicles move around and are liable to contact each other according to drivers’ common interests or social similarities. A caching node sharing more social attributes with the content requester is more likely to be interested in the same contents and distribute the contents to others with similar interests. Furthermore, a caching node that frequently meets other nodes is a better candidate to keep cache copies. To increase the network performance, CCSAMP also exploits the regularity of vehicle moving behaviors to predict the chance for a vehicle to reach hot zones based on Hidden Markov Model (HMM). We evaluate CCSAMP through the ONE simulator to demonstrate its higher cache hit ratio and lower content access delay compared to other state-of-the-art schemes.
