作者
Jie Gao, Mushu Li, Lian Zhao, Xuemin Shen
发表日期
2018/10/16
期刊
IEEE Transactions on Vehicular Technology
卷号
67
期号
12
页码范围
12288-12301
出版商
IEEE
简介
In this paper, we propose a contention intensity based distributed coordination (CIDC) scheme for safety message broadcast. By exploiting the high-frequency and periodical features of the safety message broadcast, the application-layer design of the CIDC enables each vehicle to estimate the instantaneous channel contention intensity in a fully distributed manner. With the contention intensity information, the media access control layer design of CIDC allows vehicles to adopt a better channel access strategy compared to the 802.11p. This is because CIDC selects the initial back-off counter for each new packet deterministically, i.e., based on the contention intensity, rather than randomly. The proposed CIDC is modeled, and key performance indicators in terms of the packet collision probability and average contention delay, are derived. It is shown that the proposed change in the initial counter selection leads to a …
学术搜索中的文章
J Gao, M Li, L Zhao, X Shen - IEEE Transactions on Vehicular Technology, 2018