發(fā)布時間：2018-06-25 13:11

  本文選題：網(wǎng)絡(luò)編碼 + 數(shù)字噴泉碼��； 參考：《陜西師范大學(xué)》2014年碩士論文

【摘要】：隨著互聯(lián)網(wǎng)技術(shù)的發(fā)展,網(wǎng)絡(luò)已經(jīng)成為人們?nèi)粘Ｉ畹囊徊糠�。傳統(tǒng)網(wǎng)絡(luò)傳輸方法在傳輸吞吐量方面存在較大缺陷,與傳統(tǒng)路由方法不同,在多播通信網(wǎng)絡(luò)中,通過網(wǎng)絡(luò)編碼可以使得消息傳輸速率達(dá)到網(wǎng)絡(luò)的最大流。網(wǎng)絡(luò)編碼的誕生和發(fā)展為網(wǎng)絡(luò)信息傳輸指明了一個新的研究方向。結(jié)合目前的理論成果和實踐經(jīng)驗,將網(wǎng)絡(luò)編碼技術(shù)應(yīng)用到現(xiàn)有的通信技術(shù)以獲得更好的性能,正日益成為近年來的研究熱點之一。然而,在實際應(yīng)用的過程中,面對傳輸消息和網(wǎng)絡(luò)環(huán)境的復(fù)雜,網(wǎng)絡(luò)編碼存在效率偏低和解碼率難以控制等問題。 針對網(wǎng)絡(luò)編碼的應(yīng)用問題,論文深入分析了現(xiàn)有的網(wǎng)絡(luò)編碼方案,重點研究現(xiàn)有網(wǎng)絡(luò)編碼方案在應(yīng)對復(fù)雜環(huán)境時的不足。針對非等長消息下的網(wǎng)絡(luò)編碼,結(jié)合物理層網(wǎng)絡(luò)編碼,提出了基于MPSK的編碼方案。相對于傳統(tǒng)方案,此方案發(fā)送消息的能量消耗為原方案的一半,并且使得信道容量更接近香農(nóng)熵極限。 針對無線多跳網(wǎng)絡(luò),論文設(shè)計了無線網(wǎng)絡(luò)下解碼率可控的多跳匿名網(wǎng)絡(luò)編碼方案。該方案結(jié)合LT碼的思想,提出了一種匿名可靠的編碼方案,并且方案在中繼節(jié)點不解碼的情況下,完成再編碼過程。實現(xiàn)了通信過程的匿名,保證了信宿端解碼概率的可控,并且提高了網(wǎng)絡(luò)的編解碼效率。論文提出的兩種新型網(wǎng)絡(luò)編碼方案,使網(wǎng)絡(luò)編碼在技術(shù)層面的應(yīng)用有了進(jìn)一步完善。
[Abstract]:With the development of Internet technology, Internet has become a part of people's daily life. Compared with the traditional routing method, the traditional network transmission method has a big defect in the transmission throughput. In multicast communication network, the message transmission rate can reach the maximum flow through network coding. The birth and development of network coding has pointed out a new research direction for network information transmission. Combined with the current theoretical achievements and practical experience, the application of network coding technology to the existing communication technology to achieve better performance is becoming one of the research hotspots in recent years. However, in the process of practical application, faced with the complexity of message transmission and network environment, network coding has some problems such as low efficiency and difficult to control. Aiming at the application of network coding, this paper deeply analyzes the existing network coding schemes, focusing on the shortcomings of existing network coding schemes in dealing with complex environments. Based on the physical layer network coding, a MPSK based coding scheme is proposed for the network coding with unequal length messages. Compared with the traditional scheme, the energy consumption of the scheme is half that of the original scheme, and the channel capacity is closer to the Shannon entropy limit. For wireless multi-hop networks, a multi-hop anonymous network coding scheme with controllable decoding rate is designed in this paper. Combined with the idea of LT code, this scheme proposes an anonymous and reliable coding scheme, and the scheme completes the recoding process without decoding the relay node. The anonymity of communication process is realized, the probability of decoding is controlled, and the efficiency of network coding and decoding is improved. In this paper, two new network coding schemes are proposed, which make the application of network coding in the technical level more perfect.
【學(xué)位授予單位】：陜西師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TP393.02

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本文編號：2066051