认知协作中继通信MAC设计毕业设计模版.doc

南京邮电大学毕业设计(论文) 题目认知协作中继通信 MAC 设计专业通信工程学生姓名梁原班级学号 B080209 B08020930 指导教师田峰指导单位通信工程系日期: 年月日至年月日毕业设计(论文)原创性声明本人郑重声明:所提交的毕业设计(论文),是本人在导师指导下,独立进行研究工作所取得的成果。除文中已注明引用的内容外,本毕业设计(论文)不包含任何其他个人或集体已经发表或撰写过的作品成果。对本研究做出过重要贡献的个人和集体,均已在文中以明确方式标明并表示了谢意。论文作者签名: 日期: 年月日摘要无线 Mesh 协作中继网是一种基于无线 Mesh 网的网络结构, 它通过引入协作中继通信的概念来优化其结构、提升其性能。本文在该类网络中提出了一种新的 MAC 协议设计方案,该方案研究了 Mesh 协作中继通信中中继节点的选取问题。在该MAC 协议中,当目的节点接受数据出现差错时,它向各个中继节点广播发送重传帧(Retran ),中继节点根据相应算法设置计时器,竞争产生最佳机会中继节点, 之后该最佳机会中继节点向目的节点重新传送数据信号。仿真表明,当网络中选取合适的中继节点数时,该 MAC 协议可有效改善网络的误比特率和吞吐量,提高通信质量。关键词: 无线 Mesh 网络;协作中继; MAC 协议 ABSTRACT Wireless Mesh cooperative work work structure which bases on wireless work. It optimizes its structure and enhances its performance by using cooperative relaying. This paper proposes a novel cooperative MAC design which discusses the selection of relaying nodes in Wireless Mesh cooperative work. In this new protocol, the destination node will broadcast Retran frames to relaying nodes when it can't receive data from the source node correctly. After that, those relaying nodes will set their timers according to the selection algorithm pete for the best opportunistic relaying node which will send correct data to the destination node. Experimental results show that this new MAC protocol distinctly improves the performance of work when the number of relaying nodes is proper. Key words: Wireless work; Cooperative Relaying; MAC Protoco l 目录第一章绪论................................................................................................ 1 无线 M ESH 网的发展背景和概况............................................................................ 1 协作中继通信的发展背景和概况......................................................................... 1 本文的结构与安排................................................................................................. 2 第二章 MESH 网络与协作中继通信........................................................... 3 无线 M ESH 网络概述..................................................................................