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Research on the Routing Algorithm for Wireless Mobile Ad Hoc Networks

Author: WangXueWei
Tutor: JinJie
School: Tianjin University
Course: Communication and Information System
Keywords: ad hoc networks DSR protocol Expanding ring search Simulation
CLC: TN929.5
Type: Master's thesis
Year: 2007
Downloads: 111
Quote: 2
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Abstract


The ad hoc network is composed by a group of mobile nodes with wireless transmitters and receivers, a wireless mobile communication network, networking is fast, flexible, easy to use, has been widespread concern in the international academia and industry, and being increasingly wide range of applications, has become an important direction of forward development of mobile communication technology. these ad hoc characteristics also makes the design based on the traditional network routing protocols are unable to work properly in the ad hoc network environment, so set up a special MANET (Mobile Ad hoc Networks) IETF working group to study and development of ad hoc networks, routing algorithm. The focus of this study is the ad hoc network routing protocols. The paper first describes the background of the ad hoc network, history, current status, as well as the significance of the study, and a description of its concept, features, applications, key technologies, architecture. And then focus on the ad hoc network routing protocols, routing protocols MANET working group released several routing protocols and researchers published classified simulation software performance analysis and comparison of several typical routing protocols very promising dynamic source routing protocol (DSR) in-depth study and analysis of its performance, find the lack of routing request process - flooding, proposed using a modified extended ring search technology to solve the flooding. This paper for the first time will be extended ring search applied to the DSR protocol, extended ring search as a way to control the network overhead is very effective technology can effectively control flooding, routing protocols great use value. Expanded ring search technology, improved on the basis of the original extension ring, will be applied to the DSR routing protocol software simulation of the original DSR protocol and use the extended ring search technology DSR protocol performance comparison. The simulation results show that, compared with the original DSR protocol, expanding ring search can reduce routing overhead and improve data packet delivery ratio, reduce the data packet average end-to-end delay, so as to improve the performance of the ad hoc network. In this paper, ns command to write the script to define the network topology, configuration of network information flow generation and reception, as well as the collection of statistical information, the output is a series of records for the entire simulation process data to extract useful information from data processing tools gawk, and drawing Tools gnuplot data presented to the reader in a graphical form, so it can be very intuitive original routing protocol and new routing protocol improved performance.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications
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