VANET安全应用中安全消息传输参数的自适应控制

发布时间：2018-06-14 20:49

本文选题：安全消息 + 车头时距　；参考：《西南师范大学学报(自然科学版)》2017年02期

【摘要】：车联网VANETs(Vehicular ad hoc network)被认为是下一代汽车系统的重要部分.VANETs的多数安全应用依赖于周期的基础安全消息BSM(Basic Safety Message)的可靠传输.然而,由于车辆密度、速度的不断变化,固定传输参数如BSM传输范围以及产生率会引起数据包碰撞,降低控制信道利用率,为此,传输参数应自适应VANETs安全应用的变化,而不是固定传输参数.考虑到车辆安全以及最大化控制信道利用率,提出了自适应设定传输范围以及数据包产生率ASRR(Adaptive-Set Range-Rate)算法.首先,先测量车头时距作为车辆安全的性能指标,并依据车头时距产生BSM产生率,然后再利用BSM产生率、车辆密度以及网络负载3个参数计算传输范围,使得BSM产生率、传输范围随车辆密度自适应地变化.仿真结果表明,在变化的车辆密度、车辆速度场景,提出的ASRR算法可以提高安全消息的传输成功率以及控制信道利用率.
[Abstract]:Vehicular ad hoc network) is considered to be an important part of the next generation automobile system. Most safety applications of VANETs depend on the reliable transmission of periodic basic safety message. However, due to the continuous change of vehicle density and speed, fixed transmission parameters such as BSM transmission range and rate of generation will cause packet collisions and reduce the utilization of control channels. Therefore, the transmission parameters should be adaptive to the changes of VANETs security application. Rather than a fixed transmission parameter. Considering vehicle security and maximization of control channel utilization, an adaptive algorithm for setting the transmission range and packet generation rate (ASRRX Adaptive-Set Range-Ratee) is proposed. First of all, the head-time distance is measured as the performance index of vehicle safety, and the BSM generation rate is generated according to the head-time distance, and then the BSM generation rate, vehicle density and network load are used to calculate the transmission range to make the BSM generation rate. The transmission range changes adaptively with vehicle density. The simulation results show that the proposed ASRR algorithm can improve the transmission success rate and control channel utilization rate of security messages in the varying vehicle density and vehicle speed scenes.
【作者单位】：重庆电子工程职业学院;重庆大学生物工程学院;
【基金】：国家科技支撑计划资助项目(2012BAI19B03) 教育部高校博士点基金资助项目(20090191110030) 中央高校基本科研业务费资助项目(CDJXS10231179,CDJSX102300)
【分类号】：TN929.5;U495

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