基于数据优先级和车辆密度的安全数据的转发算法

发布时间：2018-02-24 03:00

本文关键词： VANET 数据优先级车辆密度数据转发　出处：《计算机工程与科学》2017年03期 　论文类型：期刊论文

【摘要】：在VANET中,为了保证安全数据的准确性和实时性,和安全相关的数据通常需要较高的优先级并且优先传输,现有的VANET数据转发算法不能满足这一点。为了满足VANET中安全数据的优先传输需求,提出了一种数据优先级模型,并基于数据优先级和车辆密度提出了一种安全数据转发算法。数据优先级模型可以给不同状态的数据分配相应的优先级;基于数据优先级和车辆密度的数据转发算法PDT动态分配计数器阈值和碰撞窗口,动态分配碰撞窗口可以确保数据的传输次序,而动态设定计数器阈值既能够保证数据的可靠传输又能有效地抑制广播风暴。仿真结果表明,与传统的counter-based数据转发算法和slotted-p数据转发算法相比,在数据吞吐量、传输时延和抑制广播风暴方面,PDT算法都有显著的性能提升。
[Abstract]:In VANET, in order to ensure the accuracy and real-time of the security data, the security-related data usually needs higher priority and priority transmission. The existing VANET data forwarding algorithms can not meet this point. In order to meet the priority transmission requirements of secure data in VANET, a data priority model is proposed. A secure data forwarding algorithm based on data priority and vehicle density is proposed. The data priority model can assign the corresponding priority to the data in different states. Data forwarding algorithm based on data priority and vehicle density PDT dynamically allocates counter threshold and collision window. Dynamic allocation of collision window can ensure the transmission order of data. The dynamic setting of counter threshold can not only guarantee the reliable transmission of data but also effectively suppress the broadcast storm. The simulation results show that compared with the traditional counter-based data forwarding algorithm and slotted-p data forwarding algorithm, the data throughput, In terms of transmission delay and broadcast storm suppression, the PDT algorithm has significant performance improvements.
【作者单位】：武汉大学计算机学院软件工程国家重点实验室;武汉大学地球空间信息技术协同创新中心;
【基金】：国家自然科学基金(61373040,61572370) 教育部博士点基金(20150141110073)
【分类号】：U495;TN929.5

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