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| 车用自组网自适应单跳广播协议 |
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刘鸿飞1,2, 李丽君3, 钱林杰2, 葛利嘉1,2
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1.重庆大学 机械工程学院, 重庆 400044;2.重庆通信学院 军事信息工程系, 重庆 400035;3.重庆理工大学 光电信息学院, 重庆 400054
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| 摘要: |
| 在车用自组织网的单跳广播协议中,隐藏/暴露节点是影响广播信息成功分发的关键因素,媒体接入控制层的竞争窗口是影响吞吐量性能的关键因素.首先建模分析广播信息成功接收率、吞吐量与节点密度、竞争窗口之间的关系,然后针对车用自组织网的节点密度动态变化特征提出基于多目标优化的自适应可靠单跳广播协议.仿真研究结果表明,该协议通过自动调整节点竞争窗口可以在保证广播信息可靠分发的同时优化网络吞吐量. |
| 关键词: 车用自组网 单跳广播 吞吐量 多目标优化 |
| DOI： |
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| 基金项目:国家自然科学基金(61271251); 重庆市自然科学基金(cstc2011jjA0848) |
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| Self-Adaptive Single-Hop Broadcasting Protocol in VANET |
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LIU Hong-Fei1,2, LI Li-Jun3, QIAN Lin-Jie2, GE Li-Jia1,2
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1.College of Mechanical Engineering, Chongqing University, Chongqing 400044, China;2.Department of Information Science and Technology, Chongqing Communication College, Chongqing 400035, China;3.School of Opt-Electronic Information, Chongqing University of Technology, Chongqing 400054, China
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| Abstract: |
| Hidden/exposed nodes are key factor which affects the reliability of broadcasting information and the MAC Contention Window is another factor which affects the throughput for single-hop broadcasting protocols in VANET. Firstly, this paper provides a theoretical analytic model to analyze the relationship among reliability, throughput, node density and Contention Window. Next, based on multi-object optimization theory, an adaptive reliability single-hop broadcast protocol (ARSB) is proposed. Simulation results show that ARSB not only enhances broadcast reliability and satisfies the broadcasting information real-time needs, but also optimizes broadcast throughput by adapting Contention Window of broadcasting nodes. |
| Key words: vehicular ad hoc network single-hop broadcasting throughput multi-object optimization |
