本文選題：LTE-A　切入點(diǎn)：D2D中繼通信　出處：《深圳大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：近年以來,移動(dòng)通信技術(shù)實(shí)現(xiàn)了爆發(fā)式的跨越發(fā)展,4G網(wǎng)絡(luò)已經(jīng)在全球主要國家大規(guī)模商用,5G的部署也已迫在眉睫。無線通信系統(tǒng)正在朝著多網(wǎng)絡(luò)融合的方向前進(jìn),也將綜合利用多種通信技術(shù)和接入方式以解決頻譜資源短缺的問題,提高頻譜利用效率和系統(tǒng)的通信容量。D2D(Device-to-Device)技術(shù)就是其中一個(gè)熱門通信技術(shù),它允許蜂窩網(wǎng)絡(luò)中間距較近的移動(dòng)設(shè)備不通過基站而進(jìn)行直接的數(shù)據(jù)傳輸。D2D通信技術(shù)可以在移動(dòng)網(wǎng)絡(luò)中提供更加靈活的網(wǎng)絡(luò)接入和通信服務(wù),它具有數(shù)據(jù)傳輸速率高和網(wǎng)絡(luò)開銷低等眾多優(yōu)點(diǎn)。它可以復(fù)用蜂窩用戶的頻譜資源,從而極大的提高了頻譜利用效率,緩解了頻譜資源短缺的問題,同時(shí)也增加了通信系統(tǒng)的吞吐量。目前D2D通信的研究存在的問題主要有:(1)研究場景簡單,多集中于最基礎(chǔ)的D2D單跳通信和一個(gè)D2D對復(fù)用一個(gè)蜂窩用戶的場景,與實(shí)際應(yīng)用和需求不符;(2)中繼節(jié)點(diǎn)的選擇忽略節(jié)點(diǎn)的安全性和節(jié)點(diǎn)參與中繼的意愿,難以保證鏈路的安全和連接成功率;(3)干擾協(xié)調(diào)算法多注重于模式選擇、資源分配、功率控制的某個(gè)方面,若要獲得更好的效果應(yīng)該聯(lián)合多個(gè)方面,共同協(xié)作。針對當(dāng)前研究存在的問題,本論文提出了一個(gè)引入社交關(guān)系的D2D中繼通信干擾協(xié)調(diào)算法。該算法具有以下創(chuàng)新點(diǎn)和優(yōu)勢:(1)在D2D通信基礎(chǔ)架構(gòu)之上融合中繼技術(shù),并在D2D中繼通信中融合一個(gè)或多個(gè)D2D對復(fù)用同一蜂窩用戶頻譜的場景,使用分組策略進(jìn)行資源分配,可進(jìn)一步提高頻譜利用效率,增加系統(tǒng)的容量和總吞吐量;(2)利用社交關(guān)系的關(guān)鍵特性進(jìn)行中繼節(jié)點(diǎn)選擇,可顯著提高通信安全性,增加連接成功率,減小中繼探測成本;(3)結(jié)合中繼選擇、資源分配和功率控制等多個(gè)方面共同協(xié)作進(jìn)行干擾協(xié)調(diào),有效地提高了用戶SINR及系統(tǒng)吞吐量。鑒于D2D是一種新技術(shù),仿真平臺(tái)尚不成熟,本論文基于Matlab軟件開發(fā)了一個(gè)基于LTE-A的D2D通信仿真系統(tǒng),并運(yùn)用該系統(tǒng)對本論文提出的算法進(jìn)行了仿真驗(yàn)證。結(jié)果表明,該算法與傳統(tǒng)的算法相比,鏈路安全性能和連接成功率更高,且在提高用戶的SINR和系統(tǒng)總吞吐量方面具有明顯的優(yōu)勢。
[Abstract]:In recent years, mobile communication technology has achieved explosive leapfrogging development of 4G networks. The deployment of large-scale commercial 5G networks in major countries is imminent. Wireless communication systems are moving towards multi-network convergence. It will also make comprehensive use of multiple communication technologies and access methods to solve the problem of the shortage of spectrum resources. One of the most popular communication technologies is to improve the efficiency of spectrum utilization and the communication capacity of the system. D2DU Device-to-Devicetechnology is one of the most popular communication technologies. It allows mobile devices close to each other in cellular networks to transmit data directly without passing through the base station. D2D communication technology can provide more flexible network access and communication services in mobile networks. It has many advantages, such as high data transmission rate and low network overhead. It can reuse the spectrum resources of cellular users, thus greatly improve the efficiency of spectrum utilization and alleviate the shortage of spectrum resources. At the same time, it also increases the throughput of the communication system. At present, the main problems existing in the research of D2D communication are: the research scene is simple, and the most basic D2D single-hop communication and a D2D pair multiplexing a cellular user scenario are mainly focused on the most basic D2D single-hop communication. The selection of relay nodes neglects the security of nodes and the willingness of nodes to participate in relay, so it is difficult to ensure link security and connection success rate / / 3) interference coordination algorithm pays more attention to mode selection and resource allocation. Some aspect of power control, to achieve better results, should be combined with a number of aspects, work together. In view of the existing problems in current research, In this paper, a D2D relay communication interference coordination algorithm with social relationship is proposed. The algorithm has the following innovations and advantages: 1) integrating relay technology on D2D communication infrastructure. Combining one or more D2D pairs with the same cellular user spectrum in D2D relay communication and using packet strategy for resource allocation can further improve the spectrum utilization efficiency. Increase the system's capacity and total throughput to select relay nodes using the key features of social relations, can significantly improve communication security, increase the success rate of connection, and reduce the cost of relay detection. Resource allocation and power control work together to coordinate interference, which effectively improves user SINR and system throughput. Since D2D is a new technology, the simulation platform is not mature. In this paper, a D2D communication simulation system based on LTE-A is developed based on Matlab software, and the algorithm proposed in this paper is simulated and verified by the system. The results show that the algorithm is compared with the traditional algorithm. The link security performance and connection success rate are higher, and it has obvious advantages in improving the user's SINR and the total throughput of the system.
【學(xué)位授予單位】：深圳大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN929.5

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相關(guān)期刊論文 前1條

1 王磊;高露露;蔣國平;鄭寶玉;;D2D中基于社交關(guān)系的按需用戶發(fā)現(xiàn)策略[J];信號處理;2015年09期

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本文編號：1568839