摘要
针对车联网IEEE 802.11p协议的视频传输展开研究工作。首先分析无线802.11p传输机制,说明吞吐量很大程度上受节点MAC层竞争窗口值影响;其次提出针对视频节点的竞争窗口自适应算法;最后通过NS仿真实验对比,结果表明CWSA算法在画面质量与传输延迟上优于IEEE 802.11p默认竞争窗口算法。
The video transmission based on IEEE 802.11p protocol in Internet of Vehicle （IOV） is studied. The wireless 802.11p transmission mechanism is analyzed to illustrate that the throughput is affected by the contention window value in node MAC layer to a great extent. The contention window self adaptation （CWSA） algorithm for video node is proposed. The CWSA algorithm is compared with CW algorithm by means of NS simulation experiment. The results show that the image quality and transmission delay of the CWSA algorithm are better than those of IEEE 802.11p competition default window algorithm.
出处
《现代电子技术》
北大核心
2017年第16期120-122,共3页
Modern Electronics Technique
基金
国家自然科学基金(61602267)
江苏省高校自然科学研究项目(15KJB520029)
江苏省现代教育技术研究2015年度课题(2015-R-41455)
