本文關(guān)鍵詞： 交通工程 車聯(lián)網(wǎng) 無線通信子系統(tǒng) 網(wǎng)絡(luò)性能測量 測試床　出處：《長安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著車聯(lián)網(wǎng)在城市智能交通領(lǐng)域的廣泛應(yīng)用，對(duì)車聯(lián)網(wǎng)無線通信子系統(tǒng)通信的性能要求也越來越高，因此如何有效檢測車聯(lián)網(wǎng)無線通信子系統(tǒng)的網(wǎng)絡(luò)性能就成為車聯(lián)網(wǎng)領(lǐng)域一個(gè)亟待解決的問題。由于車聯(lián)網(wǎng)具有網(wǎng)絡(luò)節(jié)點(diǎn)高速移動(dòng)、網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)快速變化等特點(diǎn)，傳統(tǒng)的無線網(wǎng)絡(luò)測試平臺(tái)并不適合車聯(lián)網(wǎng)無線通信子系統(tǒng)的測試，于是設(shè)計(jì)一個(gè)功能完備、使用方便，適合車聯(lián)網(wǎng)特征的無線網(wǎng)絡(luò)測試床就具有重要的實(shí)際意義。 本文在對(duì)國內(nèi)外已有的無線網(wǎng)絡(luò)測試床進(jìn)行廣泛研究和總結(jié)的基礎(chǔ)上，提出了一種針對(duì)車聯(lián)網(wǎng)環(huán)境的無線網(wǎng)絡(luò)測試床體系架構(gòu)和設(shè)計(jì)方案。在針對(duì)車聯(lián)網(wǎng)環(huán)境的無線網(wǎng)絡(luò)測試床中，，基于網(wǎng)絡(luò)斷層掃描技術(shù)實(shí)現(xiàn)了網(wǎng)絡(luò)性能指標(biāo)的測試方案和估計(jì)算法，能夠有效獲得測試網(wǎng)絡(luò)的往返延遲、丟包率和吞吐率等主要性能指標(biāo)。具體提出了針對(duì)車聯(lián)網(wǎng)Zigbee無線通信子系統(tǒng)測試床的實(shí)現(xiàn)方案，通過對(duì)Zigbee設(shè)備節(jié)點(diǎn)是否加入網(wǎng)絡(luò)進(jìn)行自動(dòng)探測來控制網(wǎng)絡(luò)探測數(shù)據(jù)包的發(fā)送過程，從而有效解決了在車聯(lián)網(wǎng)中測試車輛快速移動(dòng)情況下的網(wǎng)絡(luò)性能測試問題，該測試床在測試過程中只傳遞探測數(shù)據(jù)包，當(dāng)檢測到被測設(shè)備移出測試區(qū)域后再對(duì)測試數(shù)據(jù)進(jìn)行離線式處理，從而進(jìn)一步提高了測試過程的實(shí)時(shí)性。最后，通過測試實(shí)例對(duì)在不同車速條件下由1個(gè)車載和1個(gè)路側(cè)ZigBee設(shè)備組成的無線網(wǎng)絡(luò)進(jìn)行了性能測試，發(fā)現(xiàn)在車輛高速移動(dòng)時(shí)ZigBee網(wǎng)絡(luò)性能波動(dòng)較大且下降嚴(yán)重，這說明ZigBee無線網(wǎng)絡(luò)并不適合高速移動(dòng)情況下的車聯(lián)網(wǎng)應(yīng)用，測試結(jié)果同時(shí)也驗(yàn)證了所設(shè)計(jì)的車聯(lián)網(wǎng)環(huán)境無線網(wǎng)絡(luò)測試床的有效性。
[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.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP391.44;TN929.5;U495

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