Disruption-resilient bundle delivery mechanism in space DTNs with partial segments aggregation
Disruption-resilient bundle delivery mechanism in space DTNs with partial segments aggregation
复制标题
具有部分分段聚合的空间 DTN 中的抗干扰捆绑传送机制
DOI：
10.1049/iet-com.2015.1210
复制
发表时间：
2016
影响因子：
1.6
通讯作者：
Li Yunhe
中科院分区：
文献类型：
--
作者：
Jiang Fu;Yang Zhihua;Li Yunhe
在空间中断容忍网络（dtn）中，由于突然链路故障导致的中断可能在束传输期间发生，这可能会引入额外的延迟，并可能导致使用当前版本典型束协议的宝贵连续接触的效率低下。尽管DTN体系结构提供了一个初步的想法——束响应式分片来缓解这些问题，但它和相关工作都很少涉及对数据包格式的修改，而数据包格式支持分片和重组。此外，在响应式分片的背景下，大多数研究都是基于在连接断开之前接收路由报头的前提下进行的，缺乏通用性。在此前提下，本文提出了一种处理突发中断的加速机制，通过对特定数据包格式的修改，有效避免了中断传输恢复所需的额外等待时间，实现了中间节点的快速转发。仿真结果证实，该方案可以有效地减少束传输时间，而不会引入明显的额外开销，并且具有良好的传输浪费度量。
In space disruption-tolerant networks (DTNs), a cessation resulting from a sudden link failure may occur during bundle transfer, which could introduce additional delay and probably lead to inefficient exploiting of precious successive contacts with current version of typical bundle protocol. Although the DTN architecture provides a preliminary idea – bundle reactive fragmentation to alleviate these problems, both it and the relevant works involve little on the modification to packet format, which supports fragmentation and reassembly. Moreover, most studies in the context of reactive fragmentation bases on a premise that routing header is received before connection breakdown, which would lack generality. In this study, without the premise, the author propose an expedited mechanism with specific packet format's modification to handle an unexpected disruption, through which extra waiting-time for recovery of the interrupted transfer could be efficiently avoided and thus achieving fast forwarding at intermediate node. The simulation results confirm that the proposed scheme can effectively reduce bundle delivery time, without introducing significant extra overheads with the respect of the well-defined metric of wasted transmission effort.