As a cooperative information system, vehicles in Vehicular Sensor Networks deliver messages based on collaboration. Due to the high speed of vehicles, the topology of the network is highly dynamic, and the network may be disconnected frequently. So how to transfer large files in such network is worth considering. The encountering nodes which never meet before flood messages blindly cause tremendous network overhead. We address this challenge by introducing the Encounter Utility Rank Router (EURR) based on social metrics. EURR includes three cases: Utility Replication Strategy, Lifetime Replication Strategy and SocialRank Replication Strategy. The Lifetime Replication is promising and complements Utility Replication. It enhances the delivery ratio by relaying the copy via the remaining lifetime. Considering the network overhead, the SocialRank Replication replicates a copy according to the SocialRank when two communicating nodes have not met before. The routing mechanism explores the utility of history encounter information and social opportunistic forwarding. The results under the scenario show an advantage of the proposed EURR over the compared algorithms in terms of delivery ratio, average delivery latency and overhead ratio.

中文翻译：

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协作车载传感器网络中基于社交的 DTN 路由

作为一个协作信息系统，车载传感器网络中的车辆基于协作传递消息。由于车辆的高速行驶，网络的拓扑结构是高度动态的，网络可能会经常断开。那么如何在这样的网络中传输大文件是值得考虑的。在洪水消息之前从未相遇的相遇节点盲目地导致巨大的网络开销。我们通过引入基于社交指标的遭遇效用等级路由器 (EURR) 来应对这一挑战。EURR包括三个案例：Utility Replication Strategy、Lifetime Replication Strategy和SocialRank Replication Strategy。Lifetime Replication 很有前景，是对 Utility Replication 的补充。它通过在剩余生命周期中中继副本来提高传递率。考虑到网络开销，当两个通信节点之前没有相遇时，SocialRank Replication 根据 SocialRank 复制一个副本。路由机制探索历史遭遇信息和社会机会转发的效用。该场景下的结果显示了所提出的 EURR 在交付率、平均交付延迟和开销率方面优于比较算法。