基于协议序列的无线信道接入算法研究

发布时间：2018-04-19 23:15

本文选题：协议序列 + 媒体接入控制　；参考：《南京理工大学》2017年硕士论文

【摘要】：协议序列是一种具有低汉明互相关的确定性和周期性二进制序列,作为一种确定性媒体接入控制协议,在不存在信道反馈的情况下能够联合信道编码为无线传感器网络或移动自组织网络中的异步用户提供最差吞吐率或延迟性能保证。尽管如此,传统协议序列信道接入算法要求各用户采用固定的信道编码率以及其序列值与信道时间之间对应关系固定,导致冗余数据传输和较多信道空闲时间,从而使得吞吐率或者延迟性能具有一定的局限性。本论文针对此问题提出改进方案,具体包括以下两方面工作:(1)提出基于自适应信道编码速率的协议序列信道接入算法,理论分析其平均吞吐率以及平均延迟性能,并进行仿真验证。仿真结果进一步表明,此机制相较于传统协议序列可以有效提升吞吐率以及延迟性能。(2)提出支持非固定数据分组传输,基于载波侦听的协议序列信道接入算法,并理论分析其平均吞吐率以及平均延迟性能。仿真结果验证了理论分析的准确性,并进一步表明了新算法可以极大改善传统协议序列的吞吐率以及延迟性能,与最优p坚持CSMA有相近的平均吞吐率性能,同时在平均延时性能上具有较大的优越性。
[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.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5;TN911.22

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