喷泉编码在DTN网络中的应用研究

摘要

DTN poses many challenges on file transferring due to intermittent connectivity and packet loss.To improve file transfer in DTN,lots of research results show that network coding can effectively improve the capability of data transmission.However the use of network coding brings about such problem as high encoding and decoding complexity, long data transmission delay and high energy consumption.This paper presents that fountain code can effectively overcome above⁃mentioned problems,at the same time,analyzes and summarizes the present research of the application of fountain code in DTN.%DTN （ Delay and Disruption Tolerant Networks ）的间歇连通性以及数据包易丢失的特性给数据传输带来了很大挑战。针对这一问题，大量的研究表明[1－3]在DTN中使用网络编码能有效提升其数据传输能力，但网络编码的使用又会带来较高的复杂度和较大的编码时延，以及更高的能量消耗。指出将喷泉码应用于 DTN 网络可以有效克服上述问题，并对目前喷泉码在DTN网络的研究现状做了分析与总结。