本文選題：協(xié)作傳輸 + 無(wú)線傳感器網(wǎng)絡(luò)��； 參考：《重慶大學(xué)》2014年博士論文

【摘要】：作為一種新型的傳輸技術(shù)，協(xié)作傳輸技術(shù)應(yīng)用于無(wú)線傳感器網(wǎng)絡(luò)（WirelessSensor Network，WSN），能夠有效發(fā)揮多用戶分集的優(yōu)勢(shì)，提高網(wǎng)絡(luò)傳輸?shù)目煽啃�。在各種協(xié)作傳輸方法中，選擇協(xié)作方法在執(zhí)行時(shí)無(wú)需全部中繼節(jié)點(diǎn)參與轉(zhuǎn)發(fā)，只需選出一個(gè)最佳中繼節(jié)點(diǎn)承擔(dān)協(xié)作傳輸任務(wù)，便可以達(dá)到與全中繼協(xié)作相同的分集效果，因此具有簡(jiǎn)便、高效、易與現(xiàn)有網(wǎng)絡(luò)集成的優(yōu)點(diǎn)，成為在無(wú)線傳感器網(wǎng)絡(luò)中實(shí)施協(xié)作傳輸技術(shù)的優(yōu)先方法。但現(xiàn)有的選擇協(xié)作傳輸方法，并未針對(duì)無(wú)線傳感器網(wǎng)絡(luò)的特征進(jìn)行設(shè)計(jì)。為了滿足傳感器網(wǎng)絡(luò)對(duì)低復(fù)雜度、低功耗、跨層設(shè)計(jì)等條件的需求，有必要對(duì)選擇協(xié)作傳輸技術(shù)進(jìn)行理論方法上的改進(jìn)與優(yōu)化，并探索優(yōu)化后的性能。 本文從無(wú)線傳感器網(wǎng)絡(luò)的特征和需求出發(fā)，按照建立系統(tǒng)模型、提出新方法、推導(dǎo)理論性能、進(jìn)行仿真驗(yàn)證、開(kāi)展實(shí)驗(yàn)測(cè)試的研究思路，對(duì)選擇協(xié)作傳輸技術(shù)在無(wú)線傳感器網(wǎng)絡(luò)中的應(yīng)用方法進(jìn)行了深入探討和系統(tǒng)性研究。 首先，針對(duì)無(wú)線傳感器網(wǎng)絡(luò)的低復(fù)雜度需求，本文提出了一種基于反饋的輕量級(jí)選擇協(xié)作傳輸方法。該方法不需要節(jié)點(diǎn)接收機(jī)具備合并接收能力，也不需要在協(xié)作時(shí)進(jìn)行信道增益排序，從而進(jìn)一步降低了選擇協(xié)作方法的實(shí)現(xiàn)復(fù)雜度。同時(shí)，通過(guò)中斷概率和分集復(fù)用權(quán)衡（Diversity Multiplexing Tradeoff，DMT）推導(dǎo)表明，輕量級(jí)方法能夠突破傳統(tǒng)選擇協(xié)作方法在中繼選擇方面的局限，無(wú)需總是選取信道增益最大的節(jié)點(diǎn)作為最佳中繼節(jié)點(diǎn)，只需從既能收到源節(jié)點(diǎn)的數(shù)據(jù)信息、又能接收到目標(biāo)節(jié)點(diǎn)的反饋信息的中繼節(jié)點(diǎn)中任選一個(gè)進(jìn)行協(xié)作轉(zhuǎn)發(fā)，就能夠達(dá)到對(duì)應(yīng)場(chǎng)景下的最優(yōu)DMT性能，這一特性為選擇協(xié)作傳輸方法建立了雙重優(yōu)化框架，擴(kuò)大了系統(tǒng)選取中繼節(jié)點(diǎn)的范圍。作為示例，論文還提出了兩種支持中繼均衡的最佳中繼節(jié)點(diǎn)選擇策略，在保持最優(yōu)DMT的基礎(chǔ)上，實(shí)現(xiàn)了各個(gè)中繼節(jié)點(diǎn)進(jìn)行協(xié)作傳輸次數(shù)的均衡，延長(zhǎng)了傳感器網(wǎng)絡(luò)的生存時(shí)間。 接著，針對(duì)WSN的跨層設(shè)計(jì)特點(diǎn)，提出了一種適用于異構(gòu)網(wǎng)絡(luò)的基于事件關(guān)聯(lián)的選擇協(xié)作方法。對(duì)于由多種傳感器組成的異構(gòu)網(wǎng)絡(luò)，當(dāng)傳感器之間的應(yīng)用層存在事件觸發(fā)關(guān)聯(lián)時(shí)，當(dāng)先活躍的傳感器在完成自身傳輸后，利用物理層的協(xié)作傳輸方法，能夠自動(dòng)協(xié)助被觸發(fā)的傳感器的傳輸，從而提高后者傳輸?shù)目煽啃�。通過(guò)將傳感器之間應(yīng)用層的關(guān)聯(lián)與物理層的協(xié)作進(jìn)行跨層聯(lián)合優(yōu)化，所提方法達(dá)到了最大分集增益。以此為基礎(chǔ)，論文還提出了一種基于功率控制的節(jié)能型中繼選擇策略，在不降低系統(tǒng)分集增益性能的前提下，最大化的降低了協(xié)作能耗開(kāi)銷，滿足了傳感器網(wǎng)絡(luò)對(duì)能量效率的需求。 然后，針對(duì)WSN的多樣化通信場(chǎng)景，提出了一種面向干擾和非正交傳輸場(chǎng)景的多點(diǎn)到單點(diǎn)選擇協(xié)作方法。通過(guò)在匯聚節(jié)點(diǎn)采用連續(xù)干擾抵消接收方式，降低了干擾受限對(duì)傳輸性能的影響，并克服了反饋延遲問(wèn)題。論文推導(dǎo)了干擾場(chǎng)景下選擇協(xié)作方法的中斷概率性能，并與已有方法進(jìn)行了對(duì)比。結(jié)果表明，所提方法在使系統(tǒng)達(dá)到足夠?qū)嵱玫目煽啃缘那疤嵯拢行嵘讼到y(tǒng)的頻譜利用效率。 最后，針對(duì)協(xié)作傳輸實(shí)驗(yàn)平臺(tái)匱乏的問(wèn)題，構(gòu)建和實(shí)現(xiàn)了一種基于無(wú)線傳感器網(wǎng)絡(luò)的改進(jìn)型選擇協(xié)作傳輸實(shí)驗(yàn)平臺(tái)。設(shè)計(jì)了實(shí)驗(yàn)平臺(tái)的架構(gòu)，將選擇協(xié)作傳輸方法應(yīng)用到基于低速無(wú)線個(gè)域網(wǎng)媒體接入控制與物理層規(guī)范標(biāo)準(zhǔn)（WirelessMedium Access Control and Physical Layer Specifications for Low-Rate WirelessPersonal Area Networks，IEEE802.15.4）的無(wú)線傳感器網(wǎng)絡(luò)中。實(shí)驗(yàn)平臺(tái)使用市售的普通無(wú)線傳感器節(jié)點(diǎn)和開(kāi)源協(xié)議棧進(jìn)行組建，成本低，擴(kuò)展性好。利用實(shí)驗(yàn)平臺(tái)，通過(guò)詳細(xì)的實(shí)驗(yàn)測(cè)試，對(duì)所提出的協(xié)作方法及其性能進(jìn)行了實(shí)際驗(yàn)證。 本文的研究工作，將協(xié)作傳輸技術(shù)與無(wú)線傳感器網(wǎng)絡(luò)密切結(jié)合起來(lái)，既完善了選擇協(xié)作傳輸技術(shù)的基本方法，擴(kuò)展了選擇協(xié)作傳輸方法的應(yīng)用范圍，又提升了無(wú)線傳感器網(wǎng)絡(luò)數(shù)據(jù)傳輸?shù)目煽啃�，有助于協(xié)作傳輸技術(shù)在無(wú)線傳感器網(wǎng)絡(luò)中的實(shí)際部署和廣泛應(yīng)用。
[Abstract]:As a new transmission technology , cooperative transmission technology is applied to wireless sensor network ( WSN ) , which can effectively play the advantage of multi - user diversity and improve the reliability of network transmission .

Based on the characteristics and requirements of wireless sensor networks , this paper puts forward a new method based on the establishment of the system model , derives the theory performance , carries out simulation verification , carries out experimental test research thinking , and makes an in - depth discussion and systematic research on the application method of selecting cooperative transmission technology in wireless sensor network .

First , according to the low complexity requirement of wireless sensor network , this paper presents a kind of feedback - based lightweight selective cooperative transmission method .

This paper presents an event - related selective cooperative method for heterogeneous networks based on the characteristics of cross - layer design of WSN . For heterogeneous networks composed of a variety of sensors , when an event trigger association exists between sensors , the first active sensor can automatically help the transmission of triggered sensors and improve the reliability of the latter . By combining the association of the application layer between sensors and the physical layer , the method achieves the maximum diversity gain . By using this method , the paper also proposes a power - controlled energy - saving relay selection strategy , which reduces the cost of cooperative energy consumption without degrading the system diversity gain performance , and satisfies the demand of the sensor network for energy efficiency .

In this paper , a multi - point - to - one - point selection cooperation method for jamming and non - orthogonal transmission scenes is proposed for the diverse communication scenarios of WSN . The influence of interference limitation on the transmission performance is reduced by adopting continuous interference cancellation reception mode at the convergence node , and the feedback delay problem is overcome . The results show that the proposed method effectively improves the spectrum utilization efficiency of the system under the premise of ensuring the reliability of the system .

In the end , an improved cooperative transmission experiment platform based on wireless sensor network is constructed and implemented aiming at the shortage of cooperative transmission experiment platform . The experimental platform is used in the wireless sensor network based on the low - speed wireless medium Access Control and Physical Layer Specifications for Low - Rate Wireless Personal Area Networks ( IEEE802.15 . 4 ) .

In this paper , the cooperative transmission technology is closely combined with the wireless sensor network , which not only perfects the basic method of selecting cooperative transmission technology , expands the application range of selecting cooperative transmission method , but also improves the reliability of wireless sensor network data transmission , and helps to realize the actual deployment and application of cooperative transmission technology in wireless sensor network .
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.5;TP212.9

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本文編號(hào)：1978901