摘要近些年来，物联网发展迅速，随之而来的是对无线网络的使用的需求迫切，因此物联网的无线网络协议越来越重要，其中就包括MAC（Media Access Control）协议。MAC协议是连接物理链路和网络层直接的纽带，负责数据通讯以及一些与硬件直接相连的操作。虽然MAC协议有很多相似的地方，但是由于使用场景的多样化，就需要各种不同的MAC协议。65851
在综合大量MAC层协议的基础上，对现有的无线传感器MAC层协议进行了归纳。初步对其进行了分类，介绍了各个典型的协议，并对各种方案进行了分析，指出了具体的优缺点。本文着重对MAC层协议CSMA/CA进行研究，对CSMA/CA协议进行了理论上的分析和通过MATLAB平台仿真分析,展示了CSMA/CA协议在两种不同的网络环境下面的表现。
毕业论文关键词 物联网 MAC层协议 CSMA/CA协议
毕业设计说明书（论文）英文摘要
In recent years, the rapid development of the Internet of Things, followed by the use of the wireless network needs urgent, so things become increasingly important wireless network protocols, including MAC (Media Access Control) protocol. MAC protocol is to connect the physical link and network layer direct link for data communication as well as some hardware directly connected with the operation. Although the MAC protocol has many similarities, but due to the persity of usage scenarios, you need a variety of different MAC protocols.
A large number of MAC layer protocol in the consolidated basis, the existing MAC layer protocol for wireless sensor are summarized. Carried out a preliminary classification describes each typical protocol, and the various options analyzed, pointing out the specific advantages and disadvantages. This article focuses on the MAC layer protocol CSMA / CA conducted research on CSMA / CA protocol for the theoretical analysis and simulation analysis through MATLAB platform, showing the CSMA / CA protocol in two different network environments following the performance.
Keywords ：MAC；protocol；CSMA / CA
目录
1、绪论 5
1.1物联网的概念 5
1.2物联网的发展 5
1.3物联网的研究现状 6
1.4 本文的主要章节安排 8
2. 物联网MAC层协议特性 8
2.1 能量浪费的原因 8
2.2 通信的方式 9
2.3 MAC协议的特征 9
3、物联网MAC层协议 10
3.1 Sensor-MAC (S-MAC) 10
3.2 WiseMAC 11
3.3 Timeout-MAC (T-MAC) 12
3.4 Traffic-Adaptive MAC (TRAMA) 12
3.5 Data-gathering MAC(D-MAC) 13
4、CSMA/CA协议相关 13
4.1 CSMA/CA协议的概念 13
4.2 802.11 MAC层 14
4.3 帧间间隔 14
4.4减少碰撞机制 15
4.5 CSMA/CA工作原理 16
4.3 CSMA/CA协议工作流程 18
6、基于MATLAB程序的CSMA/CA协议仿真对比实验 物联网的MAC层协议设计与测试:http://www.youerw.com/jisuanji/lunwen_73568.html