高速公路VANET中的安全信息优化研究
发布时间：2018-12-06 11:30
【摘要】：车辆自组织网络中的空分复用接入方案可有效地提高网络吞吐量与传递效率,但其具有节点隐藏的问题,对此提出了一种根据车辆密度自适应调节空分复用距离的控制算法。首先,每个车辆估算本地车辆密度,并与邻居车辆进行分布式的融合;然后,车辆根据车辆密度动态地调节空分复用距离,从而降低节点隐藏引起的信号干扰与数据包冲突;最终,使得空分复用距离与数据包接收率达到平衡。在每个蜂窝中,使用同步传输来提高空间与带宽的利用效率。仿真实验结果表明,该算法有效地降低了数据包冲突,提高了车辆自组织网络中空分复用接入方案的数据包传递率,并降低了端到端延迟。
[Abstract]:The spatial division multiplexing (SDDM) access scheme in vehicle ad hoc networks can effectively improve the throughput and transmission efficiency of the network, but it has the problem of node concealment. In this paper, an adaptive control algorithm is proposed to adjust the space division multiplexing distance according to the vehicle density. First of all, each vehicle estimates the local vehicle density and carries on the distributed fusion with the neighbor vehicle, then, the vehicle dynamically adjusts the space division multiplexing distance according to the vehicle density, thus reduces the signal interference caused by the node hiding and the packet collision. Finally, the space division multiplexing distance is balanced with the packet receiving rate. In each cell, synchronous transmission is used to improve space and bandwidth efficiency. The simulation results show that the proposed algorithm can effectively reduce the packet collision, improve the packet transfer rate and reduce the end-to-end delay.
【作者单位】： 梧州学院广西高校行业软件技术重点实验室;梧州学院信息与电子工程学院;武汉科技大学计算机科学与技术学院;
【基金】：国家自然科学基金(61502343) 广西自然科学基金(2015GXNSFAA139295,2013GXNSFBA019275,2013GXNSFBA019276) 梧州市科技开发项目(2015A03006) 广西高校科研项目(2013YB227、2013YB228) 武汉科技大学青年科研骨干基金(2014XZ017)
【分类号】：TN929.5;U495
，
本文编号：2365960
[Abstract]:The spatial division multiplexing (SDDM) access scheme in vehicle ad hoc networks can effectively improve the throughput and transmission efficiency of the network, but it has the problem of node concealment. In this paper, an adaptive control algorithm is proposed to adjust the space division multiplexing distance according to the vehicle density. First of all, each vehicle estimates the local vehicle density and carries on the distributed fusion with the neighbor vehicle, then, the vehicle dynamically adjusts the space division multiplexing distance according to the vehicle density, thus reduces the signal interference caused by the node hiding and the packet collision. Finally, the space division multiplexing distance is balanced with the packet receiving rate. In each cell, synchronous transmission is used to improve space and bandwidth efficiency. The simulation results show that the proposed algorithm can effectively reduce the packet collision, improve the packet transfer rate and reduce the end-to-end delay.
【作者单位】： 梧州学院广西高校行业软件技术重点实验室;梧州学院信息与电子工程学院;武汉科技大学计算机科学与技术学院;
【基金】：国家自然科学基金(61502343) 广西自然科学基金(2015GXNSFAA139295,2013GXNSFBA019275,2013GXNSFBA019276) 梧州市科技开发项目(2015A03006) 广西高校科研项目(2013YB227、2013YB228) 武汉科技大学青年科研骨干基金(2014XZ017)
【分类号】：TN929.5;U495
，
本文编号：2365960
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