發(fā)布時(shí)間：2018-08-07 19:41

【摘要】：近年來隨著整個(gè)計(jì)算機(jī)行業(yè)的發(fā)展,計(jì)算機(jī)設(shè)備的暴增給計(jì)算機(jī)網(wǎng)絡(luò)造成很大的壓力。為了使計(jì)算機(jī)用戶能夠在不需要大規(guī)模的加大網(wǎng)絡(luò)設(shè)備的前提條件下,同時(shí)能夠得到質(zhì)量更優(yōu)的網(wǎng)絡(luò)服務(wù),科研工作者們提出了網(wǎng)絡(luò)編碼機(jī)制,并得到業(yè)界的認(rèn)可并有很多人在不斷地深入的研究這一領(lǐng)域。網(wǎng)絡(luò)編碼的技術(shù)主要是用來增加整體網(wǎng)絡(luò)的性能,這些性能主要是通過整個(gè)網(wǎng)絡(luò)的吞吐量及網(wǎng)絡(luò)中的節(jié)點(diǎn)收到數(shù)據(jù)包的延時(shí)來標(biāo)量。目前,網(wǎng)絡(luò)編碼和路由協(xié)議相結(jié)合的研究尚處于新的階段。其中,最為人熟知的是分布式編碼感知路由協(xié)議,即Distributed Coding-Aware Routing in Wireless Networks(DCAR)。本文通過對DCAR路由協(xié)議進(jìn)行深入的分析和研究,從中尋找出DCAR協(xié)議中在現(xiàn)實(shí)應(yīng)用中的不足之處,即約束條件都是在理想狀態(tài)下完成,再對不足之處改進(jìn),進(jìn)而提出一個(gè)新的無線網(wǎng)絡(luò)編碼的路由協(xié)議。這個(gè)新的協(xié)議相對原始的DCAR協(xié)議來說,主要是集中于以下幾個(gè)方面的改進(jìn):1、整個(gè)路由協(xié)議的中每條數(shù)據(jù)鏈路上的數(shù)據(jù)包的發(fā)送速率是一個(gè)變量,而不像DCAR協(xié)議中是一個(gè)固定的值;2、每條鏈路上的數(shù)據(jù)包的丟包率是一個(gè)變量,以符合實(shí)際情況;3、將上述變量從兩條數(shù)據(jù)流擴(kuò)展到多條數(shù)據(jù)流之上;4、考慮到多條數(shù)據(jù)流在整個(gè)網(wǎng)絡(luò)環(huán)境中由于物理環(huán)境的變化所帶來的整個(gè)網(wǎng)絡(luò)環(huán)境的變化,并將這些變化轉(zhuǎn)化到每條數(shù)據(jù)流在節(jié)點(diǎn)處的發(fā)送數(shù)據(jù)包的速率,即當(dāng)數(shù)據(jù)包的速率為零時(shí),變相的認(rèn)為此條鏈路已經(jīng)發(fā)生斷裂,通過此種方法可以更好的反應(yīng)新的DCAR協(xié)議在整個(gè)實(shí)際的網(wǎng)絡(luò)中的性能。最后本文以NS2為模擬平臺,編寫了改進(jìn)后的DCAR協(xié)議,對新的DCAR協(xié)議進(jìn)行模擬仿真,結(jié)果表明綜合上述的方法,新的DCAR協(xié)議可以獲得較好的網(wǎng)絡(luò)性能,主要體現(xiàn)在網(wǎng)絡(luò)整體的吞吐量有所提升。
[Abstract]:In recent years, with the development of the whole computer industry, the explosion of computer equipment causes great pressure on computer network. In order to enable computer users to obtain better network services without the need for large-scale expansion of network equipment, researchers have proposed a network coding mechanism. And has been recognized by the industry and a lot of people are constantly in-depth research in this field. The technique of network coding is mainly used to increase the performance of the whole network. These performances are scalar through the throughput of the whole network and the delay of the data packets received by the nodes in the network. At present, the research on the combination of network coding and routing protocol is still in a new stage. Among them, distributed coding aware routing protocol (Distributed Coding-Aware Routing in Wireless Networks (DCAR).) is the most well-known one. Through the deep analysis and research of DCAR routing protocol, this paper finds out the deficiency of DCAR protocol in practical application, that is, the constraint condition is completed in ideal condition, and then the deficiency is improved. Then a new routing protocol for wireless network coding is proposed. Compared with the original DCAR protocol, this new protocol is mainly focused on the following aspects of the improvement: 1, the transmission rate of data packets on each data link of the entire routing protocol is a variable. Unlike the DCAR protocol, which is a fixed value, the packet loss rate on each link is a variable. In accordance with the actual situation, the above variables are extended from two data streams to more than one data stream, taking into account the changes in the entire network environment brought about by the changes in the physical environment caused by the multiple data streams in the entire network environment, These changes are converted to the rate at which each data stream sends packets at the node, that is, when the packet rate is 00:00, the link is assumed to have broken. This method can better reflect the performance of the new DCAR protocol in the whole network. Finally, using NS2 as the simulation platform, the improved DCAR protocol is compiled to simulate the new DCAR protocol. The results show that the new DCAR protocol can achieve better network performance by synthesizing the above methods. Mainly reflected in the overall network throughput has improved.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN92

【共引文獻(xiàn)】

相關(guān)期刊論文 前2條

1 盧怡睿;俞研;吳家順;;基于網(wǎng)絡(luò)編碼與分簇的車載自組網(wǎng)數(shù)據(jù)分發(fā)算法[J];計(jì)算機(jī)應(yīng)用;2014年S1期

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7 郭一s，

本文編號：2171146