通信学报2016，Vol.37Issue(10)：108-116,9.DOI:10.11959/j.issn.1000-436x.2016202
基于信道拥塞代价计算的车联网自适应消息发送速率控制方法
Adaptive message sending rate control method based on channel congestion cost calculation in VANET
摘要
Abstract
In VANET, sending beacon messages reliably played a vital role in cooperative awareness and collision avoid-ance, and changes of vehicle density in real traffic environment had a direct impact on channel load and will cause the channel congestion to a certain degree, thus causing inefficiency of cooperative security applications. Aiming at this issue, a adaptive method based on channel congestion detection to control message sending rate was designed. First of all, an interference model that can accurately reflect the current state of the channel was established. Secondly, according to the Shannon information theory and network utility maximization theory, the optimal transmission speed of the current node in the physical layer was calculated. Finally, according to the mismatch of transmission rate and transmission queue length, the next moment's cost function of the channel congestion degree by monitoring the message queue was estab-lished to avoid channel congestion and queue overflow. The simulation experiment shows that the scheme effectively re-duces communication transmission delay and avoids channel congestion, ensuring that the data be sent reliably.关键词
车联网/拥塞控制/效用/消息发送速率控制Key words
VANET/congestion control/utility/message sending rate control分类
信息技术与安全科学引用本文复制引用
刘明剑,谭国真,李帅兵,丁男,宋彩霞..基于信道拥塞代价计算的车联网自适应消息发送速率控制方法[J].通信学报,2016,37(10):108-116,9.基金项目
国家高科技基金资助项目（No.2012AA111902）；国家自然科学基金资助项目（No.61471084） Foundation Items：The National High-Tech Projects(No.2012AA111902), The National Natural Science Foundation of China (No.61471084) （No.2012AA111902）
