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: | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 565683 10 pages doi 2009 565683 Research Article A Rule-Based Data Transfer Protocol for On-Demand Data Exchange in Vehicular Environment Hsien-Chou Liao and Wen-Le Liao Department of Computer Science and Information Engineering Chaoyang University of Technology 168 JifongE. Rd. Wufong Township Taichung County 41349 Taiwan Correspondence should be addressed to Hsien-Chou Liao hcliao@ Received 28 March 2008 Revised 18 August 2008 Accepted 14 November 2008 Recommended by Zhisheng Niu The purpose of Intelligent Transport System ITS is mainly to increase the driving safety and efficiency. Data exchange is an important way to achieve the purpose. An on-demand data exchange is especially useful to assist a driver avoiding some emergent events. In order to handle the data exchange under dynamic situations a rule-based data transfer protocol is proposed in this paper. A set of rules is designed according to the principle of request-forward-reply RFR . That is they are used to determine the timing of data broadcasting forwarding and replying automatically. Two typical situations are used to demonstrate the operation of rules. One is the front view of a driver occluded by other vehicles. The other is the traffic jam. The proposed protocol is flexible and extensible for unforeseen situations. Three simulation tools were also implemented to demonstrate the feasibility of the protocol and measure the network transmission under high density of vehicles. The simulation results show that the rule-based protocol is efficient on data exchange to increase the driving safety. Copyright 2009 . Liao . Liao. 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 The improvement .
