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Reliable Bulk-Data Dissemination in Delay Tolerant Networks

机译：延迟容忍网络中可靠的批量数据分发

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摘要

Delay/Disruption Tolerant Network (DTN) differs from the conventional networks in that it has no continuous or contemporaneous connections among wireless nodes. Its inherent characteristic of intermittent connections makes existing routing solutions hardly to be applied directly. Epidemic routing using random linear network coding has been studied and proved as an efficient way for delivering small amount of data. To our best knowledge, we are the first to study high performance reliable transmission for bulk or stream-like data in DTNs. In this paper, we propose a dynamic segmented network coding scheme to efficiently exploit the transmission opportunity that is scarce in DTNs. In particular, we adopt a dynamic segment size control mechanism, which makes the segmentation adapt to the dynamics of the network. A lower bound of the expected delivery delay for bulk-data dissemination using segmented network coding is also derived. Both analytical and simulation results validate the high performance of our proposal. Several other interesting findings are also observed.
机译：延迟/中断容忍网络（DTN）与常规网络的不同之处在于，它在无线节点之间没有连续或同时的连接。其固有的间歇连接特性使现有的路由解决方案很难直接应用。使用随机线性网络编码的流行病路由已得到研究，并被证明是传递少量数据的有效方法。据我们所知，我们是第一个研究DTN中大容量或类流数据的高性能可靠传输的公司。在本文中，我们提出了一种动态分段网络编码方案，以有效利用DTN中稀缺的传输机会。尤其是，我们采用了动态分段大小控制机制，这使得分段能够适应网络的动态变化。还得出了使用分段网络编码进行批量数据分发的预期传递延迟的下限。分析和仿真结果都证明了我们建议的高性能。还观察到其他一些有趣的发现。

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