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Research and Implementation of MAC Protocols in Wireless Sensor Networks

Author: DaiZuo
Tutor: YuHongYi
School: PLA Information Engineering University
Course: Communication and Information System
Keywords: Wireless sensor networks MAC protocol Reliable Broadcast μC / OS-II
CLC: TN915.04
Type: Master's thesis
Year: 2009
Downloads: 75
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Abstract


Wireless sensor network is currently a hot field of information technology research, the purpose of collaboration and awareness, collect and process monitoring objects, and transmits the information to the needs of the user. MAC protocol is mainly to solve multiple nodes and efficient, reasonably shared channel resources and avoid conflict, is one of the key technologies of wireless sensor networks. This paper focuses on wireless sensor network MAC protocol conduct research focuses on projects designed and implemented to meet the needs of the MAC protocol. Mainly to complete the work as follows: 1, for the needs of the project to develop a MAC layer technology program, the design of a wireless sensor network MAC protocol - RB-MAC. The protocol can support reliable unicast, broadcast and reliable broadcast three kinds of ordinary business. In the Linux operating system using the NS2 simulation software for the protocol simulation, simulation results show that, RB-MAC protocol can more effectively improve network packet delivery ratio, reliability and performance indicators to meet the design requirements. 2, in the RB-MAC protocol based on a reliable broadcast given adaptive implementation. Simulation results show that in the studied reliable broadcast in several ways, the adaptive mode, the average efficiency is the highest broadcast. While the RB-MAC protocol transmission probability algorithm for the dynamic adjustment of preliminary research, and through the establishment of two-dimensional Markov chain model for analyzing its performance. The results show that, compared with the p-persistent CSMA, the algorithm has better performance. 3, a detailed description of the RB-MAC protocol in the μC / OS-II environment implementation process. According to μC / OS-II software design requirements, the RB-MAC protocol is divided into three modules and three tasks to achieve. The functions of the three modules were tested, the test results show, MAC protocol software modules running normally. 4, in the μC / OS-II environment, the realization of the application layer protocol. On RB-MAC protocol and routing protocol for functional testing, based on the upper layer protocols in order to ensure proper functioning of the RB-MAC protocols, routing protocols and application layer protocol for joint functional tests. Test results show that the upper layer protocol of each module is operating normally, to achieve their respective functions. Finally, a summary of the work done on the research process deficiencies and improvements needed are described, and the follow-up work was expected.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication network > General issues > Communication protocols, communication protocols
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