计算机技术与发展2017，Vol.27Issue(3)：12-17,6.DOI:10.3969/j.issn.1673-629X.2017.03.003
IEEE 802.11p MAC协议碰撞概率研究与分析
Investigation and Analysis on Collision Probability of IEEE 802 . 11p MAC
摘要
Abstract
The MAC layer of VANET adopts the IEEE 802. 11p/1609. x protocol,and the existing MAC protocol of wireless communica-tion cannot meet the demand of the industry of traffic informatization. The study of IEEE 802. 11p MAC is mainly through designing Markov chain model,but it is complex and difficult to calculate. Therefore,a intuitional mathematical model has been designed to research and analyze the mechanism. According to mechanisms of EDCA and on the basis of investigation on EDCA standard,a simplified mathe-matical analysis model has been designed to analyze the competitive transmission mechanism in EDCA. The investigation focuses on the collision probability of four different priorities in EDCA without consideration of the Arbitration Inter Frame Space ( AIFS) . The analysis on channel access with more nodes with the proposed model have been conducted after setting parameters of the contention windows of different priorities. The collision probabilities can be reduced and thus the quality of system be improved. Simulation results show that this model has better performance in construction research on the MAC Layer of IEEE 802. 11p.关键词
IEEE802.11p/EDCA/优先级/碰撞概率Key words
IEEE 802. 11p/EDCA/priorities/collision probability分类
信息技术与安全科学引用本文复制引用
张旭,田锦..IEEE 802.11p MAC协议碰撞概率研究与分析[J].计算机技术与发展,2017,27(3):12-17,6.基金项目
国家自然科学基金资助项目(61375121) （61375121）
南京市科技计划(2012ZD003) （2012ZD003）
