Mobility and QoS oriented 802.11p MAC scheme for vehicle-to-infrastructure communications

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• 作者：Lin Zhang ; Yu Liu ; Zi Wang ; Jinjie Guo ; Yiding Huo
• 关键词：Vehicular ad hoc networks (VANETs) ; 802.11p ; Fairness ; Delay
• 刊名：Telecommunication Systems
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：60
• 期：1
• 页码：107-117
• 全文大小：1,305 KB
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  2.Du, Y., Zhang, L., Feng, Y., Ren, Z., & Wang, Z. (2010). Performance analysis and enhancement of IEEE 802.11p/1609 protocol family in vehicular environments. In Proceedings of the 13th international IEEE conference on intelligent transportation systems (pp. 19鈥?2).
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  14.Campolo, C., Vinel, A., & Koucheryavy, Y. (2011). Modeling broadcasting in IEEE 802.11p/WAVE vehicular networks. IEEE Communication Letters, 15(2), 199鈥?01.View Article
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• 作者单位：Lin Zhang (1)
  Yu Liu (1)
  Zi Wang (1)
  Jinjie Guo (1)
  Yiding Huo (1)
  
  1. Key Lab of Universal Wireless Communications, Ministry of Education of PRC, Beijing University of Posts and Telecommunications, No. 10, Xitucheng Road, Beijing, China
  
• 刊物类别：Business and Economics
• 刊物主题：Economics
  Business Information Systems
  Computer Communication Networks
  Artificial Intelligence and Robotics
  Probability Theory and Stochastic Processes
  
• 出版者：Springer Netherlands
• ISSN：1572-9451

文摘

Vehicles in Intelligent Transportation System (ITS) can communicate with other vehicles or roadside unit (RSU) within a specific area. In ITS, different services have different requirements of Quality of Service (QoS). For delay-tolerant services, such as FTP and Email, a longtime fairness should be guaranteed, which means vehicles with different speeds should have the same chance to communicate with RSU. While for real-time services, such as voice and video, a low average delay should be achieved. Based on original DCF scheme, much modification work has been done to achieve better QoS for mixed services, but fail to consider the unfairness problem brought by mobility. In this paper, we study the performance of 802.11p MAC scheme under high- speed mobility conditions and build a Mixed-Service-Mobility model to analyze the interaction among different services. By adjusting the minimum contention window size of 802.11p MAC scheme according to different speeds, we succeed in providing a balance between the longtime fairness of delay-tolerant services and the average delay of real-time services. The proposed analytical model is validated against simulation results to demonstrate its accuracy and effectiveness.