【摘要】：隨著通信技術(shù)的發(fā)展,混合自動重傳請求技術(shù)(Hybrid Automatic reQuest,HARQ)作為無線通信中的主要差錯控制技術(shù)逐漸完善。而無線網(wǎng)絡(luò)的規(guī)模越來越大,通信設(shè)備越來越多,網(wǎng)絡(luò)中要求高數(shù)據(jù)傳輸率的業(yè)務(wù)逐漸增多,這就要求無線網(wǎng)絡(luò)提供更高的數(shù)據(jù)吞吐量。網(wǎng)絡(luò)編碼技術(shù)的出現(xiàn),為高吞吐量的要求提供了很好的解決方案,通過網(wǎng)絡(luò)編碼和HARQ技術(shù)的結(jié)合,可以在無線網(wǎng)絡(luò)中提供高吞吐量的數(shù)據(jù)傳輸業(yè)務(wù)。本文研究將網(wǎng)絡(luò)編碼應(yīng)用到HARQ中,提高傳輸系統(tǒng)的吞吐量。本文在多個單播流的環(huán)境中對基于網(wǎng)絡(luò)編碼的HARQ技術(shù)進(jìn)行研究,并在LTE上行鏈路HARQ傳輸機(jī)制中引入網(wǎng)絡(luò)編碼的概念,從而提高系統(tǒng)的吞吐量。本文主要的研究內(nèi)容為:1)介紹了傳統(tǒng)的差錯控制技術(shù)自動重傳請求(ARQ)技術(shù)和前向糾錯(FEC)技術(shù),在此基礎(chǔ)上,對HARQ技術(shù)進(jìn)行研究,并對HARQ中的碼字合并技術(shù)進(jìn)行了研究,隨后對網(wǎng)絡(luò)編碼技術(shù)進(jìn)行了研究。2)在多個單播流的環(huán)境中,對基于網(wǎng)絡(luò)編碼的HARQ技術(shù)進(jìn)行了研究。對基于網(wǎng)絡(luò)編碼的HARQ傳輸方案進(jìn)行詳細(xì)的分析,并給出了針對不同方案的吞吐量的表達(dá)式。最后在瑞利快衰落信道下進(jìn)行仿真,證實了理論分析的結(jié)果,說明了基于網(wǎng)絡(luò)編碼的HARQ技術(shù)能很大地提高系統(tǒng)的吞吐量。3)本文將基于網(wǎng)絡(luò)編碼的HARQ技術(shù)應(yīng)用在LTE上行鏈路中。針對LTE上行鏈路傳統(tǒng)HARQ傳輸?shù)奶攸c,對基于網(wǎng)絡(luò)編碼的HARQ傳輸方案進(jìn)行了研究,其中對不同碼字合并技術(shù)的HARQ傳輸方案進(jìn)行設(shè)計,最后通過仿真證實基于網(wǎng)絡(luò)編碼的HARQ相比于傳統(tǒng)HARQ有33%的吞吐量增益。仿真結(jié)果說明了在LTE上行鏈路中,基于網(wǎng)絡(luò)編碼的HARQ相比于傳統(tǒng)HARQ性能更優(yōu)。
[Abstract]:With the development of communication technology, Hybrid Automatic ReQuest (HARQ) is the main error control technology in wireless communication. As the size of the wireless network is becoming larger and larger, the communication equipment is becoming more and more, and the service of high data transmission rate in the network is increasing gradually, which requires the wireless network to provide higher data throughput. The emergence of the network coding technology provides a good solution for the requirement of high throughput, and can provide high-throughput data transmission service in the wireless network through the combination of the network coding and the HARQ technology. In this paper, the network coding is applied to the HARQ, and the throughput of the transmission system is improved. In this paper, the HARQ technology based on the network coding is studied in the environment of multiple unicast streams, and the concept of network coding is introduced in the LTE uplink HARQ transmission mechanism, thus the throughput of the system is improved. The main research contents of this paper are as follows: 1) The traditional error control technology automatic repeat request (ARQ) technology and forward error correction (FEC) technology are introduced, on this basis, the HARQ technology is studied, and the code word merging technology in the HARQ is studied. then the network coding technology is studied. 2) In the environment of multiple unicast streams, the HARQ technology based on the network coding is studied. The HARQ transmission scheme based on the network coding is analyzed in detail, and the expression of the throughput for different schemes is given. Finally, the simulation is carried out under the Rayleigh fast fading channel, and the result of the theoretical analysis is confirmed, and the system throughput can be greatly improved based on the network-coded HARQ technology. 3) The HARQ technique based on the network coding is applied in the LTE uplink. Aiming at the characteristics of the traditional HARQ transmission of the LTE uplink, the HARQ transmission scheme based on the network coding is researched, the HARQ transmission scheme of the different code word combining technology is designed, and finally, the throughput gain of 33 percent compared with the traditional HARQ is confirmed by the simulation. The simulation results illustrate that in the LTE uplink, the network-coded HARQ is better than the conventional HARQ performance.
【學(xué)位授予單位】：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】：TN929.5

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本文編號：2430959