摘要
车载自组织网络默认的IEEE802.11P协议采用了简单的干扰模型,产生了隐藏终端问题,影响了车载自组织网络的性能。提出一种启发式解决方案,考虑了干扰因素在车载自组织网络传输的不同阶段对其造成的影响,根据交通拥堵情况适时调整竞争窗尺寸和传输功率。在启发式解决方案中,不同传输阶段的数据包丢包用碰撞丢包率、SINR和队列溢出表示,自适应改善数据包竞争窗尺寸和传输功率,提高了数据包传输成功率,降低了端到端延迟。
Due to using the simplified interference model in vehicular Ad hoc network(VANET),IEEE 802.11P protocol introduces hidden terminal problems,which significantly decrease the performance of VANET.In the paper,a novel heuristic scheme was proposed to improve the contention window size and transmission power according to network and traffic conditions with consideration of the effects of interference as one of the main factors in VANET,in which packet loss can occur at different stages of transmission.By means of self-adaption,the proposed heuristic scheme optimizes the contention window size and transmission power based on three parameters,namely the collision rate,SINR(signal to interference plus Noise Ratio)and queue overflow which represent packet drop at different stages of transmission.The proposed Heuristic scheme can improve the packet transmission success rate,and reduce the endto-end delay.
作者
张宏
齐连生
吕悦晶
ZHANG Hong;QI Liansheng;LV Yuejing(Transportation Institute,Inner Mongolia University,Hohhot 010021,China;School of Automotive and Traffic Engineering,Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《应用科技》
CAS
2018年第2期76-80,共5页
Applied Science and Technology
基金
内蒙古大学高层次人才引进项目(22200-5165118)
中央高校基本科研业务费资助项目(310822171134)
