本文選題：協(xié)作通信 + 中繼選擇�。� 參考：《西安電子科技大學》2014年碩士論文

【摘要】：近年來,協(xié)作通信技術(shù)因其具有提高系統(tǒng)容量、增大數(shù)據(jù)傳輸速率、有效對抗多徑衰落及降低系統(tǒng)中斷概率和誤碼率等優(yōu)勢受到了廣泛關(guān)注。在協(xié)作通信系統(tǒng)中,中繼節(jié)點的選擇是一項關(guān)鍵技術(shù),直接決定著協(xié)作能否帶來性能上的增益。現(xiàn)有的對協(xié)作通信技術(shù)的研究主要考慮通過節(jié)點之間共享彼此的資源,來改善收發(fā)兩端的性能,卻忽略了資源共享過程中,各用戶之間的公平性問題,而這一問題實際上是會影響到系統(tǒng)的整體性能的。本文主要針對協(xié)作通信系統(tǒng)下中繼選擇和用戶調(diào)度過程的公平性問題展開研究,主要工作包括:1)通過分類介紹不同的公平性衡量準則,給出客觀評判一個資源分配模型或者一個系統(tǒng)所能達到的公平性程度的方法,并對比分析了它們各自的優(yōu)缺點。隨后,進一步闡述了現(xiàn)有的基于網(wǎng)絡壽命的公平協(xié)作協(xié)議和基于中繼節(jié)點能量消耗的公平協(xié)作協(xié)議,這兩種協(xié)議從不同的角度出發(fā),通過設計不同的公平性算法,改善了節(jié)點之間的公平性,有效的提升了網(wǎng)絡的整體性能。2)基于傳統(tǒng)的機會中繼,通過為每個中繼節(jié)點設置計數(shù)器記錄其被雇傭協(xié)助源節(jié)點的次數(shù),本文提出了新穎的公平中繼選擇算法。該算法在中繼節(jié)點選擇過程中,同時考慮由該節(jié)點中繼時的端到端信道質(zhì)量和計數(shù)器值,避免了信道質(zhì)量較好的用戶被過度利用,保證了系統(tǒng)中所有中繼節(jié)點被選擇的次數(shù)近乎相等,擁有相同的資源消耗。最后,通過仿真證明該算法可以有效的平衡每個中繼節(jié)點所消耗的功率,延長了網(wǎng)絡壽命,改善了系統(tǒng)總吞吐量。3)將比例公平調(diào)度的思想延伸到協(xié)作通信中,提出比例公平協(xié)作調(diào)度算法,應用于協(xié)作蜂窩小區(qū)的上行鏈路傳輸過程中。仿真結(jié)果表明:公平中繼選擇與比例公平協(xié)作調(diào)度算法的結(jié)合,不僅在中繼選擇過程中有效的平衡了系統(tǒng)中各個節(jié)點被選擇的次數(shù),保證了中繼選擇的公平性,延長了網(wǎng)絡壽命,還可以在系統(tǒng)吞吐量和用戶公平性之間取得很好的折中,這樣就能保證系統(tǒng)中每個用戶都能獲得近乎相等的吞吐量。
[Abstract]:In recent years, cooperative communication technology has attracted much attention because of its advantages such as increasing system capacity, increasing data transmission rate, effectively resisting multipath fading and reducing system interrupt probability and bit error rate. In cooperative communication systems, the selection of relay nodes is a key technology, which directly determines whether collaboration can bring performance gains. The existing research on cooperative communication technology mainly considers how to improve the performance of each other by sharing each other's resources among nodes, but neglects the fairness between users in the process of resource sharing. This problem will actually affect the overall performance of the system. This paper focuses on the fairness of relay selection and user scheduling in cooperative communication systems. The main work includes: 1) introducing different fairness criteria through classification. An objective method to judge the fairness of a resource allocation model or a system is given, and their respective advantages and disadvantages are compared and analyzed. Then, the existing fair cooperation protocol based on network lifetime and the fair cooperation protocol based on energy consumption of relay nodes are discussed. These two protocols design different fairness algorithms from different angles. Improved fairness between nodes, effectively improved the overall performance of the network .2) based on the traditional opportunity relay, by setting a counter for each relay node to record the number of times it is employed to assist the source node. In this paper, a novel fair relay selection algorithm is proposed. In the process of relay node selection, the end-to-end channel quality and counter value of relay node are taken into account in the algorithm, so that users with better channel quality are avoided from being overutilized. It ensures that all relay nodes in the system are selected almost equal times and have the same resource consumption. Finally, the simulation results show that the proposed algorithm can effectively balance the power consumption of each relay node, prolong the network life, improve the total throughput of the system, and extend the idea of proportional fair scheduling to cooperative communication. A proportional fair cooperative scheduling algorithm is proposed for uplink transmission in cooperative cellular cells. Simulation results show that the combination of fair relay selection and proportional fair cooperative scheduling algorithm not only effectively balances the number of times each node is selected in the relay selection process, but also ensures the fairness of relay selection. The network life is prolonged and a good compromise can be achieved between system throughput and user fairness, which ensures that every user in the system can achieve almost equal throughput.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.5

【參考文獻】

相關(guān)期刊論文 前1條

1 李富年;朱光喜;王德勝;;多用戶協(xié)作通信中基于比例公平的資源分配[J];華中科技大學學報(自然科學版);2012年02期

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本文編號：2055552