无线传感网络的各种MAC协议介绍，T-MAC,S-MAC,B-MAC,X-MAC_S-MAC周期活动时间 - CSDN文库

无线传感网络

4星 · 超过85%的资源需积分: 43 87 浏览量更新于2023-03-16 评论 8 收藏 751KB PDF 举报

身份认证购VIP最低享 7 折!

领优惠券(最高得80元）

资源详情

资源评论

资源推荐

COMPARISON OF CSMA BASED MAC PROTOCOLS

OF WIRELESS SENSOR NETWORKS

Himanshu Singh

1

and Bhaskar Biswas

2

1

Department of Computer Engineering, IT-BHU, Varanasi, India.

himanshu.singh.cse07@itbhu.ac.in

2

Department of Computer Engineering, IT-BHU, Varanasi, India.

bhaskar.cse@itbhu.ac.in

ABSTRACT

Energy conservation has been an important area of interest in Wireless Sensor networks (WSNs). Medium

Access Control (MAC) protocols play an important role in energy conservation. In this paper, we

describe CSMA based MAC protocols for WSN and analyze the simulation results of these protocols. We

implemented S-MAC, T-MAC, B-MAC, B-MAC+, X-MAC, DMAC and Wise-MAC in TOSSIM, a

simulator which unlike other simulators simulates the same code running on real hardware. Previous

surveys mainly focused on the classification of MAC protocols according to the techniques being used or

problem dealt with and presented a theoretical evaluation of protocols. This paper presents the

comparative study of CSMA based protocols for WSNs, showing which MAC protocol is suitable in a

particular environment and supports the arguments with the simulation results. The comparative study

can be used to find the best suited MAC protocol for wireless sensor networks in different environments.

KEYWORDS

Wireless Sensor Networks, Medium Access Control Protocols, Energy efficiency

1. INTRODUCTION

A 'Wireless Sensor Network' (WSN) can be described as a network of sensors which

communicate with each other wirelessly. These sensors may be installed in an unattended

environment with limited computation and sensing capabilities. Hence, they need to be fault-

tolerant and reliable so that maintenance requirement is less. Since sensors are often deployed in

remote applications like forest-fire monitoring and structural health monitoring, the battery

cannot be replaced frequently due to inaccessibility of sensor nodes. To prolong network

lifetime, energy spending should be minimum. Energy conservation can be done using efficient

macro-programming of WSNs. In [4], we present a study of methods of energy efficient macro-

programming. Another approach is to design energy efficient MAC protocols. Various MAC

protocols have been designed to address this issue.

According to a survey [2] on Wireless Sensor Networks, major sources of energy waste at

medium access communication are a) collision - which requires re-transmission of collided

packets, b) overhearing - where a node receives a message meant for another node, c) control

packet overhead - where energy is consumed in exchange of control packets used for control

data transmission and d) idle listening - which means that node is listening to idle channel and

then over-emitting by sending packets when the destination node is not yet ready.

Among all reasons mentioned above idle listening is a major cause of energy waste. So it is

important to design a suitable MAC protocol which can reduce or prevent above energy wastes.

There are four techniques to avoid idle listening - static sleep scheduling, dynamic sleep

scheduling, preamble sampling, and off-line scheduling. Based on these techniques, many MAC

protocols based on CSMA, TDMA, hybrid and cross-layer optimizations were introduced. We

classify all the famous MAC protocols for WSNs in Table 1.

本内容试读结束，登录后可阅读更多

下载后可阅读完整内容，剩余9页未读，立即下载

评论1

crystaly

2020-04-05

学习MAC协议有很好的参考价值。

曲qi~

粉丝: 3
资源: 13

会员权益专享

图片转文字

全年可省5，000元立即开通

最新资源

资源上传下载、课程学习等过程中有任何疑问或建议，欢迎提出宝贵意见哦~我们会及时处理！点击此处反馈