【摘要】：無(wú)線通信和現(xiàn)代網(wǎng)絡(luò)等技術(shù)的進(jìn)步,推動(dòng)了無(wú)線傳感器網(wǎng)絡(luò)(Wireless Sensor Network, WSN)的產(chǎn)生和發(fā)展,使其在環(huán)境監(jiān)測(cè)及預(yù)報(bào)、健康護(hù)理和智能家居等各個(gè)領(lǐng)域具有廣泛的應(yīng)用。與有線傳感器網(wǎng)絡(luò)不同的是,WSN具有大規(guī)模、自組織、拓?fù)浣Y(jié)構(gòu)動(dòng)態(tài)變化、能量有限且不可補(bǔ)充等特點(diǎn)。又因?yàn)樗菀资艿綔囟�、濕度、障礙物等的影響造成衰減、多徑、盲區(qū),致使數(shù)據(jù)傳輸產(chǎn)生丟包、重傳等現(xiàn)象。所以這就要求網(wǎng)絡(luò)在許多應(yīng)用場(chǎng)合要確保其能量有效利用且數(shù)據(jù)可靠傳輸�？紤]到優(yōu)化的拓?fù)浣Y(jié)構(gòu)可以節(jié)約網(wǎng)絡(luò)能量,確保數(shù)據(jù)可靠傳輸,本課題通過(guò)分析和總結(jié)已有的可靠拓?fù)淠Ｐ?針對(duì)WSN在可靠性和節(jié)能方面研究的不足之處,提出相應(yīng)研究?jī)?nèi)容,具體有：(1)總結(jié)了無(wú)線傳感器網(wǎng)絡(luò)拓?fù)鋬?yōu)化算法的研究現(xiàn)狀,基于實(shí)際應(yīng)用環(huán)境分析出可靠性對(duì)于增強(qiáng)網(wǎng)絡(luò)的適應(yīng)性及推動(dòng)網(wǎng)絡(luò)的應(yīng)用具有非常重要的意義,因此針對(duì)網(wǎng)絡(luò)可靠性能從鏈路穩(wěn)定和能量均衡兩方面來(lái)分析可靠拓?fù)淠Ｐ汀楸菊n題設(shè)計(jì)面向可靠性的無(wú)線傳感網(wǎng)分布式能量意識(shí)拓?fù)鋬?yōu)化算法奠定了基礎(chǔ)。(2)考慮到真實(shí)環(huán)境中的非對(duì)稱(chēng)鏈路會(huì)造成信號(hào)傳輸失敗,利用鏈路質(zhì)量預(yù)測(cè)的方法,建立面向鏈路穩(wěn)定的通信可靠模型。并以此模型為基礎(chǔ),根據(jù)分布式算法的優(yōu)勢(shì),設(shè)計(jì)了基于通信可靠模型的WSN分布式拓?fù)鋬?yōu)化算法。該算法可以建立雙向連通的拓?fù)浣Y(jié)構(gòu),并通過(guò)仿真驗(yàn)證了其具有提高網(wǎng)絡(luò)通信可靠性、降低網(wǎng)絡(luò)能耗和延長(zhǎng)網(wǎng)絡(luò)生命期的性能。(3)數(shù)據(jù)能夠成功傳輸是建立在拓?fù)淇煽炕A(chǔ)上的,并且節(jié)點(diǎn)被孤立等因素使得節(jié)點(diǎn)實(shí)際傳輸信息的時(shí)間與節(jié)點(diǎn)耗盡能量的時(shí)間不一致,因此分別建立拓?fù)淇煽磕Ｐ秃玩溌穼?shí)際生存時(shí)間模型。然后以此為基礎(chǔ)提出面向通信可靠與能量均衡的WSN拓?fù)鋬?yōu)化模型,并設(shè)計(jì)了相應(yīng)的拓?fù)鋬?yōu)化算法。理論分析和仿真結(jié)果表明該算法不僅能提高網(wǎng)絡(luò)可靠性,而且延長(zhǎng)了網(wǎng)絡(luò)傳輸信息的時(shí)間。
[Abstract]:The progress of wireless communication and modern network technology has promoted the generation and development of Wireless Sensor Network (WSN), and made it widely used in various fields such as environmental monitoring and forecasting, health care and intelligent home. Unlike wired sensor networks, WSN has a large, self-organized, and topological structure. Dynamic change, energy limited and non complementary, and because it is vulnerable to temperature, humidity, obstacles and other effects to cause attenuation, multipath, blind area, resulting in data transmission loss, retransmission and other phenomena. So this requires the network to ensure the efficient use of energy and reliable transmission of data in many applications. The topology structure can save network energy and ensure reliable data transmission. By analyzing and summarizing the existing reliable topology models, this paper puts forward the corresponding research contents in view of the shortcomings of WSN in reliability and energy saving research. (1) it summarizes the research status of the topology optimization algorithm of wireless sensor network, based on the actual needs. It is of great significance to analyze the reliability of the network to enhance the adaptability of the network and to promote the application of the network. Therefore, the reliable topology model is analyzed from two aspects of link stability and energy balance. 2. (2) considering the asymmetric link in the real environment will cause the failure of signal transmission, the link quality prediction method is used to establish a link stable reliable communication model. Based on this model, a distributed topology optimization algorithm based on the reliability model of communication is designed based on the advantages of the distributed algorithm. The algorithm is designed for the WSN distributed topology optimization algorithm. We can establish a bidirectional connected topology, and verify that it can improve the reliability of the network communication, reduce the energy consumption of the network and prolong the lifetime of the network. (3) the successful transmission of the data is based on the topology and reliability, and the nodes are isolated so that the nodes actually transmit the time and node consumption of the information. When the energy is not consistent, the topology reliable model and the link actual survival time model are established respectively. Then, the WSN topology optimization model for communication reliability and energy balance is proposed and the corresponding topology optimization algorithm is designed. The theoretical analysis and simulation results show that the algorithm not only improves the network reliability, but also shows that the algorithm can improve the reliability of the network. It also prolongs the time of network transmission of information.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：TP212.9;TN929.5
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本文編號(hào)：2129372