Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Performance Evaluation of Important Ad Hoc Network Protocols | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2006 Article ID 78645 Pages 1-11 DOI WCN 2006 78645 Performance Evaluation of Important Ad Hoc Network Protocols S. Ahmed and M. S. Alam Department of Electrical and Computer Engineering University of South Alabama Mobile AL 36688-0002 USA Received 15 July 2005 Accepted 12 December 2005 A wireless ad hoc network is a collection of specific infrastructureless mobile nodes forming a temporary network without any centralized administration. A user can move anytime in an ad hoc scenario and as a result such a network needs to have routing protocols which can adopt dynamically changing topology. To accomplish this a number of ad hoc routing protocols have been proposed and implemented which include dynamic source routing DSR ad hoc on-demand distance vector AODV routing and temporally ordered routing algorithm TORA . Although considerable amount of simulation work has been done to measure the performance of these routing protocols due to the constant changing nature of these protocols a new performance evaluation is essential. Accordingly in this paper we analyze the performance differentials to compare the above-mentioned commonly used ad hoc network routing protocols. We also analyzed the performance over varying loads for each of these protocols using OPNET Modeler . Our findings showthat for specific differentials TORA shows better performance over the two on-demand protocols that is DSR and AODV. Our findings are expected to lead to further performance improvements of various ad hoc networks in the future. Copyright 2006 S. Ahmed and M. S. Alam. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION A collection of autonomous nodes or terminals that communicate with each other by forming a
