發(fā)布時(shí)間：2018-05-08 06:21

  本文選題：無線Mesh網(wǎng)絡(luò) + 節(jié)點(diǎn)設(shè)備部署　； 參考：《西安電子科技大學(xué)》2014年碩士論文

【摘要】：無線Mesh網(wǎng)絡(luò)(Wireless Mesh Network)是一種典型的擁有自組織、自愈合特點(diǎn)的寬帶無線分布式多跳網(wǎng)絡(luò)。作為一種新型的網(wǎng)絡(luò)架構(gòu),WMN在可靠性、擴(kuò)展性以及靈活性等多方面相比較傳統(tǒng)網(wǎng)絡(luò)而言具備很大的優(yōu)勢(shì)。面對(duì)日益廣泛的無線形式網(wǎng)絡(luò)需求,在WMN的規(guī)劃部署階段中面對(duì)無線鏈路復(fù)雜多變的特性,節(jié)點(diǎn)部署位置的選擇對(duì)網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)、性能和建造成本等有著直接且重要的影響。但是目前卻缺少一種與LQMP(Link Quality Mesh Protocol)路由協(xié)議相結(jié)合的WMN工程節(jié)點(diǎn)部署選擇的指導(dǎo)方法。因此迫切需求一種實(shí)際可靠的鏈路質(zhì)量評(píng)價(jià)機(jī)制及其質(zhì)量顯示方案來指導(dǎo)工程部署中節(jié)點(diǎn)位置的選擇。另外,當(dāng)某一網(wǎng)關(guān)設(shè)備節(jié)點(diǎn)出現(xiàn)故障時(shí)節(jié)點(diǎn)還需及時(shí)做出自適應(yīng)故障處理,以保證整個(gè)部署網(wǎng)絡(luò)的健壯性,從而提升用戶網(wǎng)絡(luò)體驗(yàn)。為此,本文從測(cè)試部署之中遇到的實(shí)際問題出發(fā),主要研究無線Mesh網(wǎng)絡(luò)中節(jié)點(diǎn)部署的位置選擇問題和網(wǎng)關(guān)節(jié)點(diǎn)設(shè)備容錯(cuò)性問題。文中首先提出了一種基于LQMP路由協(xié)議的改進(jìn)的無線鏈路質(zhì)量評(píng)價(jià)機(jī)制,該機(jī)制結(jié)合了路由協(xié)議理論研究和實(shí)際測(cè)試經(jīng)驗(yàn),通過提取節(jié)點(diǎn)緩存隊(duì)列長(zhǎng)度、數(shù)據(jù)傳輸平均延遲、丟包率以及鄰居節(jié)點(diǎn)信號(hào)強(qiáng)度等參數(shù)傳遞給路由協(xié)議形成補(bǔ)充的路由判據(jù),為不同的數(shù)據(jù)傳輸需求選擇對(duì)應(yīng)的最佳下一跳無線鏈路,從而更快更好地指導(dǎo)WMN部署工程中節(jié)點(diǎn)位置的選擇；然后,本文針對(duì)網(wǎng)關(guān)節(jié)點(diǎn)故障(如網(wǎng)線斷線)修復(fù)的問題,結(jié)合了路由協(xié)議的研究,實(shí)現(xiàn)了一種節(jié)點(diǎn)自適應(yīng)切換工作模式的機(jī)制。該機(jī)制通過定時(shí)檢測(cè)自身實(shí)際工作能力,根據(jù)檢測(cè)結(jié)果自適應(yīng)地切換自身工作模式為ServerNode模式或者NormalNode模式,保證終端用戶不因網(wǎng)關(guān)設(shè)備故障問題而失去網(wǎng)絡(luò)連接。本文完成了工程部署暴露問題的改進(jìn)方案的詳細(xì)設(shè)計(jì)與實(shí)現(xiàn),并進(jìn)行了實(shí)際測(cè)試。測(cè)試結(jié)果表明,文中提出的鏈路質(zhì)量評(píng)價(jià)機(jī)制能夠在不明顯增加背景數(shù)據(jù)流的前提下,在一定程度上提高無線鏈路的可信度,能夠?yàn)闊o線Mesh網(wǎng)絡(luò)的測(cè)試部署提供更高效、更直接的節(jié)點(diǎn)位置選擇指導(dǎo)。文中提出的自適應(yīng)工作模式切換機(jī)制能夠在設(shè)計(jì)考慮的故障因素發(fā)生時(shí)自動(dòng)完成模式切換,提升了部署的無線Mesh網(wǎng)絡(luò)的健壯性。
[Abstract]:Wireless Mesh Network (Wireless Mesh Network) is a typical wideband wireless distributed multi-hop network with the characteristics of self-organization and self-healing. As a new network architecture, WMN has great advantages over traditional networks in many aspects, such as reliability, expansibility and flexibility. In the face of the increasingly extensive demands of wireless networks and the complex and changeable characteristics of wireless links in the planning and deployment phase of WMN, the selection of node deployment locations has a direct and important impact on the network topology, performance and construction costs. However, there is a lack of a method to guide the deployment of WMN project nodes combined with LQMP(Link Quality Mesh protocol. Therefore, a practical and reliable link quality evaluation mechanism and its quality display scheme are urgently needed to guide the selection of node positions in engineering deployment. In addition, when a gateway device node fails, the node also needs to make adaptive fault processing in time to ensure the robustness of the entire deployment network, thereby improving the user network experience. Therefore, starting from the practical problems encountered in the test deployment, this paper mainly studies the location selection problem of node deployment in wireless Mesh network and the fault tolerance problem of gateway node equipment. In this paper, an improved wireless link quality evaluation mechanism based on LQMP routing protocol is proposed. The mechanism combines the theoretical research of routing protocol and practical testing experience. By extracting the queue length of the node cache, the average delay of data transmission is obtained. The parameters such as packet loss rate and neighbor node signal intensity are passed to the routing protocol to form a supplementary routing criterion, and the optimal next-hop wireless link is selected for different data transmission requirements. In order to guide the selection of node location in WMN deployment project faster and better. Then, this paper combines the research of routing protocol to solve the problem of node fault repair (such as network wire breakage). A mechanism of node adaptive switching operation mode is implemented. According to the detection results, the mechanism adaptively switches its working mode to ServerNode mode or NormalNode mode, so as to ensure that the end user does not lose the network connection due to the failure of the gateway equipment. In this paper, the detailed design and implementation of the improved scheme of engineering deployment exposure problem are completed, and the actual test is carried out. The test results show that the proposed link quality evaluation mechanism can improve the reliability of wireless link to a certain extent without significantly increasing the background data flow, and can provide more efficient test deployment for wireless Mesh networks. More direct node location selection guide. The adaptive mode switching mechanism proposed in this paper can automatically complete the mode switching when the fault factors are considered in the design, which improves the robustness of the deployed wireless Mesh networks.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 彭玉旭;張力軍;;一種新的增加Ad hoc網(wǎng)絡(luò)吞吐量的MAC協(xié)議設(shè)計(jì)[J];電子與信息學(xué)報(bào);2007年02期

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本文編號(hào)：1860300