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  本文選題：VLC + 網(wǎng)絡(luò)策略�。� 參考：《西安電子科技大學(xué)》2014年碩士論文

【摘要】：目前,關(guān)于固態(tài)發(fā)光二極管(LED)材料和設(shè)備方面的研究取得了一定進(jìn)展,這預(yù)示LED將成為未來主要的照明光源。由于具有大容量、免頻譜申請、抗電磁干擾、安全性高,低成本等優(yōu)勢,使得基于LED的可見光通信吸引了越來越多的注意。為了建立室內(nèi)可見光網(wǎng)絡(luò),我們需要提出合理的全雙工通信方式。一些學(xué)者提出使用紅外通信作為上行鏈路來避免上下行鏈路之間的相互干擾。這對于用戶不多的情況可能適用,但對于多用戶(尤其是動態(tài)用戶)的室內(nèi)可見光網(wǎng)絡(luò),用戶之間的接入干擾,用戶自身下行可見光鏈路的接收干擾將會更加明顯。在本文中,為解決全雙工通信質(zhì)量和多用戶網(wǎng)絡(luò)構(gòu)建的關(guān)鍵問題,我們重點(diǎn)研究了室內(nèi)可見光網(wǎng)絡(luò)模型和網(wǎng)絡(luò)策略。首先,為了充分利用紅外頻譜資源和消除多用戶之間紅外鏈路的相互干擾,我們提出“多波長-空間管理”方案來管理室內(nèi)移動用戶。方案規(guī)定了用戶鏈路管理準(zhǔn)則,即用戶的上行鏈路由波長匹配的LED終端管理,下行鏈路由所在VLC區(qū)域的終端管理。其次,我們設(shè)計了多收發(fā)照明/通信終端模型,在終端各個方向上集成了一定數(shù)量相同波長的紅外接收器。因?yàn)榻K端的尺寸大小限制,所有適用的紅外波長接收器被集成若干個終端上。同時,我們設(shè)計了合理的多終端的拓?fù)浣Y(jié)構(gòu),以達(dá)到照明均勻和消除用戶接收干擾(或消除照明重疊區(qū)域)的目的。再次,我們提出基于CSMA/CA技術(shù)的改進(jìn)方法以提高可見光帶寬利用率和消除多用戶接入干擾。基于上述理論,我們給出了多用戶接入策略和用戶之間建立連接策略。同時,我們也呈現(xiàn)了在接入碰撞概率,吞吐量,用戶接入網(wǎng)絡(luò)時間和用戶建立連接時間方面的網(wǎng)絡(luò)性能。最后,我們進(jìn)行了數(shù)值仿真,結(jié)果顯示我們提出的網(wǎng)絡(luò)方案和路由策略在室內(nèi)多用戶可見光網(wǎng)絡(luò)中是適用的和可行的。
[Abstract]:At present, some progress has been made in the research of solid-state light-emitting diode (LED) materials and devices, which indicates that LED will become the main lighting source in the future. Due to the advantages of large capacity, spectrum free, anti-electromagnetic interference, high security and low cost, visible light communication based on LED attracts more and more attention. In order to establish indoor visible light network, we need to propose a reasonable mode of full duplex communication. Some scholars propose to use infrared communication as uplink to avoid interference between uplink and downlink. This may be applicable to the situation where there are not many users, but for the indoor visible light networks with multiple users (especially dynamic users), the interference between the users and the reception interference of the users' own downlink visible light link will be more obvious. In this paper, in order to solve the key problems of full-duplex communication quality and multi-user network construction, we focus on the indoor visible light network model and network strategy. Firstly, in order to make full use of the infrared spectrum resources and eliminate the interferences between multiple users, we propose a multi-wavelength space management scheme to manage indoor mobile users. The scheme provides the user link management criteria, that is, the uplink of the user is managed by the wavelength matched LED terminal, and the downlink is managed by the terminal in the VLC region. Secondly, we design a multi-transceiver illumination / communication terminal model and integrate a certain number of infrared receivers with the same wavelength in each direction of the terminal. Due to the size of the terminal, all applicable infrared wavelength receivers are integrated into several terminals. At the same time, we design a reasonable topology of multi-terminal to achieve the goal of uniform illumination and eliminating user interference (or overlapping area of illumination). Thirdly, we propose an improved method based on CSMA/CA technology to improve the utilization of visible light bandwidth and eliminate multi-user access interference. Based on the above theory, we present a multi-user access strategy and a user-to-user connection strategy. At the same time, we also present the network performance in terms of access collision probability, throughput, user access time and user setup time. Finally, numerical simulation results show that the proposed network scheme and routing strategy are applicable and feasible in indoor multi-user visible light networks.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.1

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本文編號：1775191