協(xié)作多播組認知無線電網(wǎng)絡的資源分配研究
發(fā)布時間：2018-07-22 11:49
【摘要】：現(xiàn)代社會經濟的發(fā)展帶動科技的進步,科技的快速進步促進無線通信服務的需求量迅速增長,這需要大量的頻譜資源來支撐。然而,頻譜資源十分有限,必須探索超越傳統(tǒng)通信技術的新技術和新方法。為解決無線電頻譜資源匱乏的問題,提出了認知無線電。認知無線電方案自首次提出便受到大量關注,因授權頻段通信具有突發(fā)性,存在大量頻譜空洞,新技術旨在使非授權與授權通信網(wǎng)絡并存。在不對授權用戶造成不可控干擾的前提下,非授權用戶最大限度地使用授權頻段,提高了頻譜的利用率,一定程度上解決了頻譜資源不足的問題。協(xié)作傳輸技術與傳統(tǒng)點對點通信鏈路不同,對傳輸模型中存在的問題進行重新思考,根據(jù)中繼的特點結合分集增益提出新的解決方案,提高系統(tǒng)傳輸容量,具有極大的潛在發(fā)展價值,是通信技術的重要研究方向。本文基于認知無線電網(wǎng)絡,利用協(xié)作多播技術,最大限度的使用無線信道,提升服務質量,研究資源分配方案,具體內容如下:1.在現(xiàn)階段研究基礎上,提出了一種基于協(xié)作認知無線電網(wǎng)絡的頻譜感知方案,允許授權用戶與認知用戶之間就檢測概率、感知時間、能量門限值等影響頻譜感知和頻譜分配的關鍵因素進行博弈,最大化各自的經濟效益。在此基礎上,應用博弈的思想分析授權用戶與認知用戶的行為策略,通過仿真實驗,驗證所提出的模型框架在一定程度上不僅提高了認知用戶的收益,并且在保障授權用戶的權益前提下提高了其最終收益,達到了雙贏的目的。2.研究了基于組內組間協(xié)作傳輸?shù)亩嗖ソM機制,在認知無線電(Cognitive Radio,CR)網(wǎng)絡中該傳輸機制下無線資源配置優(yōu)化問題,考慮主用戶和認知用戶之間的信號干擾,及各用戶的功率限制,理論分析優(yōu)化用戶傳輸速率,得出功率優(yōu)化分配方案,仿真結果驗證,在功率分配方案下,新機制可以使更多用戶擁有更高的傳輸速率,當功率限制時,通過加權因子,可使主用戶保持良好的用戶性能。
[Abstract]:The development of modern society and economy leads to the progress of science and technology, and the rapid progress of science and technology promotes the demand for wireless communication services rapidly, which needs a large number of spectrum resources to support. However, the spectrum resources are very limited, we must explore new technologies and methods beyond traditional communication technology. In order to solve the problem of lack of radio spectrum resources, cognitive radio is proposed. Cognitive radio scheme has attracted much attention since it was first proposed. Because of the sudden nature of authorized frequency band communication, there are a large number of spectrum holes. The new technology aims to make unauthorized and authorized communication networks coexist. On the premise of not causing uncontrollable interference to authorized users, unauthorized users maximize the use of authorized frequency bands, improve the utilization of spectrum, and solve the problem of insufficient spectrum resources to a certain extent. The cooperative transmission technology is different from the traditional point-to-point communication link. The problems existing in the transmission model are reconsidered. According to the characteristics of relay and diversity gain, a new solution is proposed to improve the transmission capacity of the system. It has great potential development value and is an important research direction of communication technology. Based on cognitive radio network, this paper uses cooperative multicast technology to maximize the use of wireless channels, improve the quality of service, research resource allocation scheme, the specific content is as follows: 1. On the basis of current research, a spectrum sensing scheme based on cooperative cognitive radio network is proposed, which allows authorized users and cognitive users to detect probability and sensing time. The key factors affecting spectrum sensing and spectrum allocation, such as energy threshold, play games to maximize their respective economic benefits. On this basis, the game theory is applied to analyze the behavior strategies of authorized users and cognitive users. Through simulation experiments, it is verified that the proposed model framework not only improves the income of cognitive users to a certain extent. And in the premise of protecting the rights and interests of authorized users, it improves its final income and achieves the win-win goal. 2. 2. In this paper, the multicast group mechanism based on inter-group cooperative transmission is studied. In Cognitive Radio (CR) network, the problem of wireless resource allocation optimization is studied. The interference between primary and cognitive users is considered, and the power limitation of each user is considered. Through theoretical analysis and optimization of user transmission rate, the power allocation scheme is obtained. Simulation results show that the new mechanism can make more users have higher transmission rate under the power allocation scheme. When power is limited, the weighting factor is adopted. Can make the main user maintain good user performance.
【學位授予單位】：鄭州大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN925
本文編號：2137362
[Abstract]:The development of modern society and economy leads to the progress of science and technology, and the rapid progress of science and technology promotes the demand for wireless communication services rapidly, which needs a large number of spectrum resources to support. However, the spectrum resources are very limited, we must explore new technologies and methods beyond traditional communication technology. In order to solve the problem of lack of radio spectrum resources, cognitive radio is proposed. Cognitive radio scheme has attracted much attention since it was first proposed. Because of the sudden nature of authorized frequency band communication, there are a large number of spectrum holes. The new technology aims to make unauthorized and authorized communication networks coexist. On the premise of not causing uncontrollable interference to authorized users, unauthorized users maximize the use of authorized frequency bands, improve the utilization of spectrum, and solve the problem of insufficient spectrum resources to a certain extent. The cooperative transmission technology is different from the traditional point-to-point communication link. The problems existing in the transmission model are reconsidered. According to the characteristics of relay and diversity gain, a new solution is proposed to improve the transmission capacity of the system. It has great potential development value and is an important research direction of communication technology. Based on cognitive radio network, this paper uses cooperative multicast technology to maximize the use of wireless channels, improve the quality of service, research resource allocation scheme, the specific content is as follows: 1. On the basis of current research, a spectrum sensing scheme based on cooperative cognitive radio network is proposed, which allows authorized users and cognitive users to detect probability and sensing time. The key factors affecting spectrum sensing and spectrum allocation, such as energy threshold, play games to maximize their respective economic benefits. On this basis, the game theory is applied to analyze the behavior strategies of authorized users and cognitive users. Through simulation experiments, it is verified that the proposed model framework not only improves the income of cognitive users to a certain extent. And in the premise of protecting the rights and interests of authorized users, it improves its final income and achieves the win-win goal. 2. 2. In this paper, the multicast group mechanism based on inter-group cooperative transmission is studied. In Cognitive Radio (CR) network, the problem of wireless resource allocation optimization is studied. The interference between primary and cognitive users is considered, and the power limitation of each user is considered. Through theoretical analysis and optimization of user transmission rate, the power allocation scheme is obtained. Simulation results show that the new mechanism can make more users have higher transmission rate under the power allocation scheme. When power is limited, the weighting factor is adopted. Can make the main user maintain good user performance.
【學位授予單位】：鄭州大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN925
【參考文獻】
相關期刊論文 前1條
1 王凡森;趙拯;陳志剛;;一種基于子載波合并的多播資源調度算法[J];電子與信息學報;2014年05期
，本文編號：2137362
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