本文選題：自組織網(wǎng)絡(luò)　切入點(diǎn)：認(rèn)知無線電　出處：《北京郵電大學(xué)》2014年博士論文　論文類型：學(xué)位論文

【摘要】：隨著無線通信技術(shù)的快速發(fā)展,大量新的無線接入技術(shù)及無線數(shù)據(jù)業(yè)務(wù)應(yīng)用不斷出現(xiàn)。相應(yīng)的,對(duì)無線頻譜的需求急劇增加,導(dǎo)致了可用頻譜資源變得越來越擁擠和不足；同時(shí),網(wǎng)絡(luò)數(shù)據(jù)傳輸速率和服務(wù)質(zhì)量,同無線傳輸?shù)目煽啃砸约熬W(wǎng)絡(luò)連通性的矛盾也日益凸顯�；谡J(rèn)知無線電技術(shù)的認(rèn)知無線自組織網(wǎng)絡(luò),有效的利用了授權(quán)用戶使用率較低的頻譜資源,提高了頻譜的利用效率；而基于中繼協(xié)作技術(shù)的協(xié)作無線自組織網(wǎng)絡(luò),通過對(duì)網(wǎng)絡(luò)用戶發(fā)送的信息進(jìn)行處理和轉(zhuǎn)發(fā),提供了空間分集增益,有效的提高了數(shù)據(jù)的傳輸速率和質(zhì)量。作為未來移動(dòng)通信系統(tǒng)的末端網(wǎng)絡(luò)和組成部分,認(rèn)知及協(xié)作無線自組織網(wǎng)絡(luò)是移動(dòng)通信發(fā)展的重要方向,得到了越來越多的關(guān)注。 在認(rèn)知及協(xié)作無線自組織網(wǎng)絡(luò)中,需要解決的重點(diǎn)問題之一是無線資源的管理,如信道容量優(yōu)化,頻譜共享,中繼選擇與功率分配等。目前,已經(jīng)有很多研究機(jī)構(gòu)和學(xué)者就此相關(guān)領(lǐng)域展開研究,并取得了一定的成果。但是,在該領(lǐng)域仍存在許多亟待解決的問題。 本論文針對(duì)認(rèn)知無線自組織網(wǎng)絡(luò)中的分布式功率分配、多跳無線網(wǎng)絡(luò)中的中繼選擇與功率分配、以及OFDM協(xié)作網(wǎng)絡(luò)中的中繼選擇與功率分配問題進(jìn)行了深入研究,提出了相應(yīng)的創(chuàng)新性解決方案,并通過理論分析和仿真實(shí)驗(yàn)證明了所提出的算法對(duì)系統(tǒng)性能的提升。本論文的主要貢獻(xiàn)和成果包括三個(gè)方面,總結(jié)如下： 1)提出了一種認(rèn)知無線自組織網(wǎng)絡(luò)中基于進(jìn)化博弈理論的分布式功率分配機(jī)制。在對(duì)認(rèn)知用戶的吞吐量和傳輸策略進(jìn)行分析后,引入最優(yōu)反應(yīng)動(dòng)態(tài)模型對(duì)認(rèn)知用戶間分布式的功率分配過程進(jìn)行建模。進(jìn)一步的,提出了通過用戶根據(jù)自身及相鄰節(jié)點(diǎn)的傳輸策略,自適應(yīng)的進(jìn)行功率調(diào)整的分布式算法,在網(wǎng)絡(luò)總功率和認(rèn)知用戶自身功率限制條件下,優(yōu)化認(rèn)知用戶的數(shù)據(jù)傳輸速率,降低能量消耗。 2)提出了一種協(xié)作無線自組織網(wǎng)絡(luò)中基于分節(jié)模式和博弈理論的多跳鏈路中繼選擇和功率分配機(jī)制。針對(duì)多跳中繼自組織網(wǎng)絡(luò)中上游節(jié)點(diǎn)選擇中繼的過程對(duì)同一路徑上其他節(jié)點(diǎn)的中繼選擇以及鏈路端到端性能的影響,定義了一種新的協(xié)作模式：分節(jié)協(xié)作模式,分析了該協(xié)作模式的信道容量和中斷概率性能。研究了分節(jié)協(xié)作中基于動(dòng)態(tài)博弈委托-代理模型的功率分配方法,以優(yōu)化自身吞吐量為目標(biāo)對(duì)參與協(xié)作的節(jié)點(diǎn)進(jìn)行自適應(yīng)的功率分配。進(jìn)一步提出了啟發(fā)式的分節(jié)協(xié)作算法來改善多中繼協(xié)作多跳鏈路的信道容量和中斷概率性能,降低節(jié)點(diǎn)的能量消耗。 3)提出了一種協(xié)作無線自組織網(wǎng)絡(luò)中基于節(jié)點(diǎn)能量效率的子載波配對(duì),中繼選擇和能量分配聯(lián)合優(yōu)化機(jī)制。對(duì)基于放大轉(zhuǎn)發(fā)模式的OFDM多中繼系統(tǒng)中的能量效率問題進(jìn)行了分析,設(shè)計(jì)了基于節(jié)點(diǎn)的能量效率和剩余能量的協(xié)作中繼選擇標(biāo)準(zhǔn)；提出了基于能量效率的異步功率迭代方法,并證明了該方法中納什均衡的存在性和收斂性；進(jìn)一步提出了子載波配對(duì),中繼選擇和能量分配的聯(lián)合優(yōu)化算法,并應(yīng)用遺傳算法對(duì)所提算法性能進(jìn)行優(yōu)化。該算法能夠提高網(wǎng)絡(luò)節(jié)點(diǎn)的能量效率和生存時(shí)間。
[Abstract]:With the rapid development of wireless communication technology, a new wireless access technology and wireless data service applications appear continuously. Accordingly, the wireless spectrum leads to a sharp increase in the demand for the available spectrum resources become more and more crowded and inadequate; at the same time, the network data transmission rate and quality of service, with wireless transmission reliability and network connectivity the contradictions have become increasingly prominent. The cognitive radio technology in cognitive wireless ad hoc network based on the effective use of the authorized users can use the lower rate of spectrum resources, improves the spectrum utilization efficiency; and relay cooperative wireless ad hoc network based on processing and forwarding through the network users to send the information provided the space diversity gain, and effectively improve the transmission rate and quality of data. As the future mobile communication system and terminal network components, cognitive As an important direction of the development of mobile communication, more and more attention has been paid to the cooperative wireless self-organizing network.
In the cognitive and cooperative wireless ad hoc networks, one of the key problems of wireless resource management, such as channel capacity optimization, spectrum sharing, relay selection and power allocation. At present, there have been a lot of research institutions and scholars in related fields, and achieved certain results. However, there are still many problem to be solved in this field.
This thesis focuses on the cognitive wireless ad hoc network's distributed power allocation, relay selection and power allocation in multi hop wireless networks, in-depth research and relay selection and power allocation problems in cooperative OFDM network, proposes some innovative solutions, and prove that the proposed algorithm to enhance the performance of the system through theoretical analysis and simulation experiments. The main contributions and achievements of this thesis include three aspects, summarized as follows:
1) proposed a cognitive wireless ad hoc network distributed power allocation mechanism based on evolutionary game theory. Based on the analysis of the cognitive user throughput and transmission strategy, the optimal reaction dynamic model of the cognitive users distributed power allocation process model. Further, put forward by the user according to their own transmission strategy and the adjacent nodes, adjust power distributed algorithm, the total power network and cognitive user's power restriction, data transmission rate optimization of cognitive users, reduce the energy consumption.
2) we propose a cooperative wireless ad hoc network segment model and game theory multi hop link Relay Selection and power allocation mechanism based on multi hop relay node. According to the network from the upstream relay selection process for the same path selection of other nodes and relay link end to end performance, definitions a new cooperation mode: segmented cooperative mode, cooperative mode of the channel capacity and outage probability performance is analyzed. The research section cooperation power allocation method of principal agent model based on dynamic game theory, to optimize the throughput for power allocation of cooperative node adaptively. Further put forward the cooperation section the heuristic algorithm to improve the multi relay cooperative multi hop link channel capacity and outage probability performance, reduce the energy consumption of the nodes.
3) we propose a cooperative wireless ad hoc network node energy efficiency based on subcarrier pairing mechanism, the joint optimization of relay selection and power allocation. The energy efficiency problem of amplify and forward mode of OFDM relay system are analyzed based on the design criteria for selecting cooperative energy efficiency and the residual energy of nodes based on the relay put forward; asynchronous power iteration method based on energy efficiency, and prove the convergence and the existence of Nash equilibrium in the process; further proposed subcarrier pairing algorithm, joint optimization of relay selection and power allocation, and the application of genetic algorithm to optimize the performance of the proposed algorithm. The algorithm can improve the energy efficiency and survival the time of network nodes.

【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 馬東冉;張科;;Ad Hoc網(wǎng)絡(luò)的體系結(jié)構(gòu)分析[J];重慶科技學(xué)院學(xué)報(bào)(自然科學(xué)版);2007年03期

2 梅中輝;李曉飛;;協(xié)作通信技術(shù)[J];數(shù)據(jù)通信;2009年05期

3 魏急波;王杉;趙海濤;;認(rèn)知無線網(wǎng)絡(luò):關(guān)鍵技術(shù)與研究現(xiàn)狀[J];通信學(xué)報(bào);2011年11期

，

本文編號(hào)：1567701