计算机工程与应用2016，Vol.52Issue(14)：105-109,135,6.DOI:10.3778/j.issn.1002-8331.1601-0302
基于速度与状态感知的车载网络接入退避算法
Vehicle-speed-and-network-status-sensing based backoff algorithm for vehicular netwok access
杨博 1王杉 2石新新1
作者信息
- 1. 国防科学技术大学 电子科学与工程学院，长沙 410073
- 2. 中国人民解放军96172部队
- 折叠
摘要
Abstract
IEEE 802.11p protocol is the MAC layer and physical layer standard designed for wireless access in vehicular environment. The backoff algorithm it utilized is Binary Exponential Backoff(BEB). BEB doesn’t adjust along with the change of the vehicle speed and the network status, which will lead to serious unfairness and collision in vehicle-to-infrastructure communications. So it can’t be well applied to the vehicular network. In order to solve these problems, a novel algorithm is proposed, which uses a constant optimal contention window in backoff process. The contention window can also be adjusted with the vehicle speed as well as the network status got from roadside units. The mathematical analysis and simulation experimental results show that the proposed algorithm in this paper can obviously improve the performance of channel access such as throughput, fairness, reliability and so on.关键词
车载自组织网络/车路通信/IEEE 802.11p/公平性/媒体访问控制协议Key words
Vehicular Ad Hoc Networks(VANET)/Vehicle to Infrastructure(V2I)communication/IEEE 802.11p/fairness/Media Access Control(MAC)protocol分类
计算机与自动化引用本文复制引用
杨博,王杉,石新新..基于速度与状态感知的车载网络接入退避算法[J].计算机工程与应用,2016,52(14):105-109,135,6.
