车联网车路无线网络性能测试床的设计

发布时间：2018-01-23 13:37

本文关键词： 交通工程车联网无线通信子系统网络性能测量测试床　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着车联网在城市智能交通领域的广泛应用，对车联网无线通信子系统通信的性能要求也越来越高，因此如何有效检测车联网无线通信子系统的网络性能就成为车联网领域一个亟待解决的问题。由于车联网具有网络节点高速移动、网络拓扑结构快速变化等特点，传统的无线网络测试平台并不适合车联网无线通信子系统的测试，于是设计一个功能完备、使用方便，适合车联网特征的无线网络测试床就具有重要的实际意义。本文在对国内外已有的无线网络测试床进行广泛研究和总结的基础上，提出了一种针对车联网环境的无线网络测试床体系架构和设计方案。在针对车联网环境的无线网络测试床中，，基于网络断层扫描技术实现了网络性能指标的测试方案和估计算法，能够有效获得测试网络的往返延迟、丢包率和吞吐率等主要性能指标。具体提出了针对车联网Zigbee无线通信子系统测试床的实现方案，通过对Zigbee设备节点是否加入网络进行自动探测来控制网络探测数据包的发送过程，从而有效解决了在车联网中测试车辆快速移动情况下的网络性能测试问题，该测试床在测试过程中只传递探测数据包，当检测到被测设备移出测试区域后再对测试数据进行离线式处理，从而进一步提高了测试过程的实时性。最后，通过测试实例对在不同车速条件下由1个车载和1个路侧ZigBee设备组成的无线网络进行了性能测试，发现在车辆高速移动时ZigBee网络性能波动较大且下降严重，这说明ZigBee无线网络并不适合高速移动情况下的车联网应用，测试结果同时也验证了所设计的车联网环境无线网络测试床的有效性。
[Abstract]:With the wide application of vehicle networking in the field of urban intelligent transportation, the performance of wireless communication subsystem is becoming more and more important. Therefore, how to effectively detect the network performance of the vehicle network wireless communication subsystem has become an urgent problem in the field of vehicle networking. The traditional wireless network testing platform is not suitable for the test of the wireless communication subsystem of vehicle network, so the design of a complete function, easy to use. The wireless network test bed suitable for vehicle networking features is of great practical significance. This paper is based on the extensive research and summary of the existing wireless network test bed at home and abroad. This paper presents a wireless network test bed architecture and design scheme for the vehicle network environment, in the wireless network test bed for the vehicle network environment. Based on the network tomography technology, the test scheme and estimation algorithm of network performance index are implemented, which can effectively obtain the round-trip delay of the test network. The main performance indexes, such as packet loss rate and throughput rate, are presented. The implementation of the test bed for the Zigbee wireless communication subsystem in the vehicle network is put forward in detail. The transmission process of network detection data packet is controlled by automatically detecting whether the Zigbee device node joins the network. Therefore, the network performance testing problem in the case of fast moving vehicle in the vehicle network is effectively solved. The test bed only transmits the detection data packet during the testing process. When the tested equipment is removed from the test area, the test data is processed offline, which further improves the real-time performance of the test process. Finally. The performance of a wireless network composed of one vehicle and one roadside ZigBee device under different speed conditions is tested by a test example. It is found that the performance of ZigBee network fluctuates greatly and decreases seriously when the vehicle moves at high speed, which indicates that the ZigBee wireless network is not suitable for the application of vehicle networking under the condition of high-speed movement. The test results also verify the effectiveness of the designed wireless network test bed.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP391.44;TN929.5;U495

【参考文献】