张旭东,姚卫红,方仁孝.一种基于虚拟目的节点的VANET可靠单跳广播机制[J].,2015,55(4):417-423 |
一种基于虚拟目的节点的VANET可靠单跳广播机制 |
A reliable one-hop broadcast scheme in VANET based on virtual destination node |
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DOI:10.7511/dllgxb201504013 |
中文关键词: 车载自组网 单跳 广播 虚拟目的节点 |
英文关键词: vehicular ad hoc network one-hop broadcast virtual destination node |
基金项目:“八六三”国家高技术研究发展计划资助项目(2012AA111902-2). |
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中文摘要: |
在车载自组网(VANET)中,单跳广播通常是紧急警告消息传播的基本机制.针对传统IEEE 802.11单跳广播存在的不可靠性问题,提出了一种基于虚拟目的节点的可靠单跳广播机制VDB-ROBS 广播节点对实时接收的数据帧进行统计分析,从邻居节点中选择一个合适的节点作为虚拟目的节点,然后广播节点将与这个虚拟目的节点进行单播传输,同时其他邻居节点仍然将单播帧视作传统的广播帧接收.这种机制使得广播传输能够利用单播中的RTS/CTS、ACK、重传和竞争窗口调整等多种修复和自适应机制,有效地提高了单跳广播的可靠性.仿真结果表明,VDB-ROBS相比传统的IEEE 802.11单跳广播机制和基于概率的可靠单跳广播机制,能够提供更可靠的单跳广播通信性能. |
英文摘要: |
In the vehicular ad hoc network (VANET), one-hop broadcast is usually the basic scheme of emergency warning messages communication. To deal with the problem of unreliability of traditional IEEE 802.11 one-hop broadcast, a reliable one-hop broadcast scheme based on virtual destination node — VDB-ROBS is proposed. The broadcast node carries on the statistical analysis of the received real-time data frames to select a suitable node from neighbor nodes as virtual destination node, then the broadcast node will be unicast with the virtual destination node, while the other neighbor nodes still receive this unicast frames as traditional broadcast frames. Therefore, this approach can utilize multiple unicast recovery and self-adaptation scheme, such as RTS/CTS, ACK, retransmission and contention window adjustment, thus can effectively improve the reliability of one-hop broadcast. Simulation results show that compared with traditional IEEE 802.11 one-hop broadcast scheme and probability-based reliable one-hop broadcast scheme, the proposed VDB-ROBS provides more reliable performance of one-hop broadcast communication. |
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