关键词: 命名数据网络（NDN）, 车辆自组织网络（VANET）, 热点内容挖掘, 热点内容推送, 转发策略优化

Abstract: In vehicular named data networking (V-NDN), the probability of unresponsive interest packets increases greatly because of the mobility of the vehicles. The current solution is that the vehicle node caches all the received packets, but this approach makes nodes cache a large amount of duplicate replica packets and increases the overhead of caching. In order to solve this problem, a hot content push algorithm for urban road is proposed. First of all, this paper proposes a hot topic mining algorithm used to mine the hot content from massive amounts of data. Then, through the hot content push algorithm, the hot topics will be pushed to other nodes which may access these contents to improve the network performance, in order to improve the network performance. Finally, the influencing factors should be considered when mining hot contents theoretically. Simulation results indicate that, compared with the greedy forwarding strategy, the addition of hot content push algorithm increases the request satisfaction rate by 4.6% to 14.1%, and increases the cache hit rate by 16.6% to 33.0%.

Key words: named data networking (NDN), vehicular ad-hoc networks (VANET), hot content mining, hot content push, forwarding strategy optimization