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LBHD: Drop policy for routing protocols with delivery probability estimation

机译：LBHD：具有传送概率估计的路由协议的丢弃策略

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Delay Tolerant Networks (DTN) are characterized by a lack of end-to-end connectivity. As such, messages (called bundles) can be stored in buffers for a long time. Network congestion can result in poor delivery rates, as bundles are dropped before having a chance of reaching their destination. Some routing protocols, such as the Probabilistic Routing Protocol using History of Encounters and Transitivity (PRoPHET), maintain estimations of delivery probabilities for each destination. In this paper, a new drop policy called Largest Bundle's Hosts Deliverability (LBHD) is proposed that considers all the hosts that received a replica of the same bundle, and their respective delivery probability as estimated by PRoPHET. LBHD uses this additional information to better manage congestion. Simulation results show that LBHD achieves the best delivery probability when compared with other drop policies proposed in the literature. The LBHD policy achieved an average delivery rate 37% better than the default Drop Head (FIFO) policy at the price of a 21% increased average delay.
机译：时延容忍网络（DTN）的特点是缺乏端到端连接。这样，消息（称为捆绑包）可以长时间存储在缓冲区中。网络拥塞可能会导致较差的传递速度，因为在有机会到达目的地之前将捆绑包丢弃了。某些路由协议（例如，使用遭遇和传递的历史的概率路由协议（PRoPHET））维护每个目标的传递概率估计。在本文中，提出了一种称为“最大捆绑包的主机可传递性”（LBHD）的新丢弃策略，该策略考虑了收到同一捆绑包副本的所有主机，以及它们各自的传递概率（由PRoPHET估计）。 LBHD使用此附加信息来更好地管理拥塞。仿真结果表明，与文献中提出的其他丢弃策略相比，LBHD实现了最佳的交付概率。 LBHD策略的平均交付率比默认的Drop Head（FIFO）策略高37％，但平均延迟增加了21％。

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