發(fā)布時間：2018-03-05 03:36

  本文選題：Ad　切入點：Hoc網絡　出處：《中南大學》2014年碩士論文　論文類型：學位論文

【摘要】：施,網絡中的節(jié)點既是主機、又是路由器,它非常適用于一些特殊的場合,相關技術是當前無線網絡技術研究的熱點方向。隨著人們對多媒體服務要求的提高,對Ad Hoc網絡中提供QoS保障服務的要求也越來越高。然而,由于Ad Hoc網絡與傳統的蜂窩通信網絡、WLAN等具有根本性的不同,所以這為研究Ad Hoc網絡的相關技術帶來了挑戰(zhàn)。本文研究的對象是Ad Hoc網絡的DSR路由協議,對如何提升它的QoS保障進行了深入的研究。 本文對于DSR路由協議,在參閱了大量文獻的研究成果基礎上,針對DSR協議的缺點做了一些優(yōu)化改進,目標在于提升路由協議的QoS性能。文中首先闡述了DSR協議的運作過程,并指出了在路由回復階段中容易發(fā)生的路由響應沖突問題,針對此缺陷提出了一個DSR-BCA路由算法,算法修改了節(jié)點的路由請求報文、路由回復報文、路由出錯報文,并完善了協議在網絡中的運作過程。另一個本文分析了Ad Hoc網絡在受到DoS攻擊時的缺陷,在DSR-BCA協議的基礎上增加了一個應對DoS攻擊的機制并命名為DSR-BCA-RD協議。先讓參與到路由鏈路中的節(jié)點都執(zhí)行路由參與驗證算法,當網絡數據傳輸的丟包率超過預設閾值時,用隔離算法找出被DoS攻擊的節(jié)點并隔離它,使網絡中有效節(jié)點的比例最大化。 最后,利用NS2仿真平臺進行了實驗驗證與對比分析。結果表明,在原DSR協議基礎上的優(yōu)化起到了較好的效果,經過優(yōu)化處理的算法在各性能指標上得到了不同程度的提高,對于提升DSR協議的QoS性能起到了一定的作用。圖19幅,表8個,參考文獻77篇。
[Abstract]:The node in the network is not only the host but also the router. It is very suitable for some special occasions. The related technology is the hot research direction of the wireless network technology at present. The demand for providing QoS security services in Ad Hoc networks is becoming higher and higher. However, due to the fundamental differences between Ad Hoc networks and traditional cellular communication networks, Therefore, this brings challenges to the research of Ad Hoc network technologies. The object of this paper is the DSR routing protocol of Ad Hoc network, and how to improve its QoS guarantee is deeply studied. In this paper, on the basis of consulting a lot of research results of DSR routing protocol, we make some optimization improvements to the shortcomings of DSR protocol, the goal of which is to improve the QoS performance of the routing protocol. In this paper, the operation process of DSR protocol is first described. This paper also points out the problem of routing response conflict in the phase of routing response, and proposes a DSR-BCA routing algorithm to solve this problem. The algorithm modifies the routing request message, the route reply message and the routing error message of the node. It also improves the operation process of the protocol in the network. Another paper analyzes the defects of Ad Hoc network when it is attacked by DoS. Based on the DSR-BCA protocol, a mechanism to deal with the DoS attack is added and named DSR-BCA-RD protocol. Firstly, the nodes participating in the routing link are executed routing participation verification algorithm. When the packet loss rate of the network data transmission exceeds the preset threshold, The isolation algorithm is used to find the node attacked by DoS and isolate it so as to maximize the proportion of effective nodes in the network. Finally, the NS2 simulation platform is used for experimental verification and comparative analysis. The results show that the optimization based on the original DSR protocol has a better effect, and the optimized algorithm has been improved in different degree on each performance index. It plays an important role in improving the QoS performance of DSR protocol.
【學位授予單位】：中南大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP393.08

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本文編號：1568597