本文選題：協(xié)議序列 + 媒體接入控制�。� 參考：《南京理工大學(xué)》2017年碩士論文

【摘要】：協(xié)議序列是一種具有低漢明互相關(guān)的確定性和周期性二進(jìn)制序列,作為一種確定性媒體接入控制協(xié)議,在不存在信道反饋的情況下能夠聯(lián)合信道編碼為無線傳感器網(wǎng)絡(luò)或移動(dòng)自組織網(wǎng)絡(luò)中的異步用戶提供最差吞吐率或延遲性能保證。盡管如此,傳統(tǒng)協(xié)議序列信道接入算法要求各用戶采用固定的信道編碼率以及其序列值與信道時(shí)間之間對(duì)應(yīng)關(guān)系固定,導(dǎo)致冗余數(shù)據(jù)傳輸和較多信道空閑時(shí)間,從而使得吞吐率或者延遲性能具有一定的局限性。本論文針對(duì)此問題提出改進(jìn)方案,具體包括以下兩方面工作:(1)提出基于自適應(yīng)信道編碼速率的協(xié)議序列信道接入算法,理論分析其平均吞吐率以及平均延遲性能,并進(jìn)行仿真驗(yàn)證。仿真結(jié)果進(jìn)一步表明,此機(jī)制相較于傳統(tǒng)協(xié)議序列可以有效提升吞吐率以及延遲性能。(2)提出支持非固定數(shù)據(jù)分組傳輸,基于載波偵聽的協(xié)議序列信道接入算法,并理論分析其平均吞吐率以及平均延遲性能。仿真結(jié)果驗(yàn)證了理論分析的準(zhǔn)確性,并進(jìn)一步表明了新算法可以極大改善傳統(tǒng)協(xié)議序列的吞吐率以及延遲性能,與最優(yōu)p堅(jiān)持CSMA有相近的平均吞吐率性能,同時(shí)在平均延時(shí)性能上具有較大的優(yōu)越性。
[Abstract]:Protocol sequence is a deterministic and periodic binary sequence with low hamming cross-correlation as a deterministic media access control protocol. In the absence of channel feedback, joint channel coding can guarantee the worst throughput or delay performance for asynchronous users in wireless sensor networks or mobile ad hoc networks. However, the traditional protocol sequence channel access algorithm requires each user to adopt a fixed channel coding rate and a fixed relationship between the sequence value and the channel time, which leads to redundant data transmission and more channel idle time. Therefore, the throughput or delay performance is limited to a certain extent. In this paper, an improved scheme is proposed to solve this problem, including the following two aspects: 1) A protocol sequence channel access algorithm based on adaptive channel coding rate is proposed, and its average throughput and average delay performance are analyzed theoretically. And the simulation is carried out. Simulation results further show that compared with conventional protocol sequences, this scheme can effectively improve throughput and delay performance. (2) the proposed protocol sequence channel access algorithm based on carrier detection supports non-fixed data packet transmission. The average throughput and average delay performance are analyzed theoretically. The simulation results verify the accuracy of the theoretical analysis, and further show that the new algorithm can greatly improve the throughput and delay performance of the traditional protocol sequences, and has the same average throughput performance as the optimal p persistent CSMA. At the same time, it has great superiority in average delay performance.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN929.5;TN911.22

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本文編號(hào)：1775169