面向功率控制的车载自组织网络组网研究

发布时间：2018-04-28 03:41

本文选题：车载自组织网络 + 移动模型　；参考：《福建师范大学》2015年硕士论文

【摘要】：近年来,交通的安全和效率问题成为全世界各国面临的重大考验,全世界由于交通事故和交通效率低下造成了不可估计的人员伤亡和经济损失。车载自组织网络(VANET,Vehicular Ad Hoc Network)作为移动自组织网络(MANET,Mobile Ad Hoc Network)的一个分支,它通过车辆节点之间信息的交换,能够实时的了解周围车辆的行驶状态和及时知道路况信息,从而提高车辆的行驶安全性,并缓解交通拥堵,提高交通效率。单跳广播是VANET中信息传输的主要方式,而由于VANET信道资源有限、网络规模大等特点,随着车辆节点越来越密集,将造成网络负载过大。因此,若不对广播信息的覆盖范围加以控制的话,将造成“广播风暴”等问题,使得网络性能大幅度降低甚至出现网络瘫痪。本文以VANET的安全性应用为出发点,提出一种面向功率控制的VANET组网方式。首先,由于车辆节点的移动直接影响了VANET拓扑结构的变化,因此,为了验证本文提出算法的有效性和优越性,提出了一种更符合现实的车载移动模型。该模型是基于SUMO仿真平台的,是对其中的跟车模型和变道模型改进而成的,并通过仿真分析,证明了新模型的有效性。其次,本文提出了一种新的VANET功率控制算法,该算法通过找出每个车辆节点的直接邻居车辆,然后根据直接邻居车辆的位置来调整发射功率,进而控制节点的广播信息覆盖范围。最后,经过大量的仿真实验和结果分析,证明了文中所提出算法的有效性,并且能够有效的降低网络负载,优化网络传输时延以及分组投递率等性能参数,从而保证安全信息的有效传输。
[Abstract]:In recent years, the problem of traffic safety and efficiency has become a major test for all countries all over the world. Traffic accidents and inefficiency have caused inestimable casualties and economic losses all over the world. As a branch of Manet Mobile Ad Hoc Network), the vehicle-mounted ad hoc network (VANETV) can be used as a branch of Manet Mobile Ad Hoc Network). Through the exchange of information between vehicle nodes, it can understand the driving state of the surrounding vehicles in real time and know the road condition information in time. In order to improve the driving safety of vehicles, and alleviate traffic congestion, improve traffic efficiency. Single hop broadcasting is the main way of information transmission in VANET. Because of the limited resource of VANET channel and the large scale of network, as the vehicle nodes become more and more dense, the network load will be too large. Therefore, if the coverage of broadcast information is not controlled, problems such as "broadcast storm" will be caused, and the performance of the network will be greatly reduced or even the network will be paralyzed. Based on the security application of VANET, this paper proposes a power control oriented VANET networking method. Firstly, because the movement of vehicle nodes directly affects the change of VANET topology, in order to verify the effectiveness and superiority of the proposed algorithm, a more realistic vehicle moving model is proposed. The model is based on the SUMO simulation platform and is improved from the following model and the changing track model. The simulation results show that the new model is effective. Secondly, this paper proposes a new VANET power control algorithm, which finds out the direct neighbor vehicle of each vehicle node, and adjusts the transmission power according to the position of the direct neighbor vehicle. Then the broadcast information coverage of the node is controlled. Finally, a large number of simulation experiments and results analysis show that the proposed algorithm is effective, and can effectively reduce the network load, optimize the network transmission delay and packet delivery rate and other performance parameters. In order to ensure the effective transmission of security information.
【学位授予单位】：福建师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U495;TN929.5

【共引文献】