本文選題：高速鐵路 + EVDO��； 參考：《大連理工大學(xué)》2016年碩士論文

【摘要】：近些年來鐵路速度大幅提升,中國進入了高鐵時代,高鐵作為一種新型的交通工具,其快速、廉價與便捷的特點深深的吸引了許多用戶,乘坐高鐵出行漸漸成為越來越多用戶的第一選擇。哈大高鐵是國家骨干高速鐵路網(wǎng)絡(luò)的重要組成部分,全長921公里,設(shè)計時速350公里,跨越東北三省四大城市,線路位于遼寧境內(nèi),全長達到553公里。大連境內(nèi)線路總長113公里,設(shè)有大連、大連北、普蘭店西、瓦房店4個停車站,九里莊、臺山、三十里堡明洞、小山屯、筆架山、老虎屯共計6條總長度為6.7公里隧道。哈大高鐵線路匯集了多類的場景,如隧道、市區(qū)與郊縣交界、山區(qū)、農(nóng)村空曠場景等等,用戶感知問題涉及的連續(xù)覆蓋、弱覆蓋、系統(tǒng)間操作問題的優(yōu)化較為困難；同時哈大高鐵時速較高,在高鐵場景研究中也涉及普通鐵路的類似問題,如多普勒效應(yīng)的影響分析、快衰落問題、車體穿透損耗問題、終端高速移動問題、高速行駛中連續(xù)覆蓋的保持問題等等,這大大增加了移動網(wǎng)絡(luò)覆蓋優(yōu)化的難度,在這樣的情況下,也對以往的列車高速運行狀態(tài)下無線網(wǎng)絡(luò)的優(yōu)化方案提出了挑戰(zhàn)。本文主要研究了哈大高鐵大連段中國電信CDMA無線網(wǎng)絡(luò)覆蓋優(yōu)化問題,基于高鐵的高時速、密封性強導(dǎo)致信號穿透性差、邊緣用戶感知、切換帶設(shè)置等特異性,分析和論證了多普勒頻移、快衰落、車體穿透損耗以及終端高速移動等阻礙無線傳播的物理現(xiàn)象,提出了新的高鐵移動網(wǎng)絡(luò)覆蓋的優(yōu)化策略,最終以哈大高鐵大連段為例得出一些通用的解決方案,最終提升后續(xù)的高鐵用戶感知。本文詳細介紹了高鐵移動網(wǎng)絡(luò)覆蓋優(yōu)化的難點,為了提升哈大高鐵大連段的EVDO的網(wǎng)絡(luò)質(zhì)量,給出了高鐵移動網(wǎng)絡(luò)覆蓋優(yōu)化的策略,同時積累了優(yōu)化經(jīng)驗,希望經(jīng)過本次研究,在高鐵移動網(wǎng)絡(luò)覆蓋優(yōu)化上形成一套完善的優(yōu)化思路,最終為高鐵上的3G用戶提供滿意的移動網(wǎng)絡(luò)使用感知。同時,本文還通過大連高鐵沿線的CDMA網(wǎng)絡(luò)覆蓋信號質(zhì)量的優(yōu)化后的網(wǎng)絡(luò)進行復(fù)測,對整個系統(tǒng)進行了有效的調(diào)整,最后各項指標(biāo)都有了非常明顯的提升,優(yōu)化效果顯著。
[Abstract]:In recent years, the speed of the railway has greatly increased. China has entered the era of high-speed rail. As a new type of transportation, high-speed rail has attracted many users deeply because of its rapid, cheap and convenient characteristics. Travel by high-speed train has gradually become the first choice for more and more users. The high-speed railway is an important part of the national backbone high-speed railway network, with a total length of 921 km / h and a design speed of 350 km / h, spanning four cities in three provinces of northeast China. The line is located in Liaoning Province and has a total length of 553 km / h. Dalian line total 113 km, with Dalian, Dalian North, Plantan West, Wafangdian four parking stations, Jiulizhuang, Taishan, Sanshilibao Ming Dong, Xiaotun, Bijiao Hill, Tiger Tun a total of 6 total length of 6.7 km tunnels. There are many kinds of scenarios such as tunnel, the border between urban area and suburban county, mountain area, rural open area and so on. The problem of user perception involves continuous coverage, weak coverage and optimization of operational problems between systems. At the same time, the speed of high-speed railway in Harbin and Dalian is relatively high. Similar problems such as the analysis of the influence of Doppler effect, the problem of fast fading, the problem of car body penetration loss, and the problem of terminal high-speed movement are also involved in the research of high-speed railway. The maintenance of continuous coverage in high speed driving greatly increases the difficulty of mobile network coverage optimization. In this case, it also challenges the previous wireless network optimization schemes in high-speed train operation. This paper mainly studies the coverage optimization of China Telecom CDMA wireless network in Dalian section of high-speed railway. Based on the high speed of high-speed rail, the strong sealing of high-speed railway leads to poor signal penetration, edge user perception, switching band setting and so on. The physical phenomena such as Doppler frequency shift, fast fading, car body penetration loss and terminal high-speed movement are analyzed and demonstrated, and a new optimization strategy for high-speed rail mobile network coverage is proposed. Finally, take Dalian section of Harbin high-speed railway as an example to come up with some common solutions, and finally improve the user perception of high-speed rail. In order to improve the network quality of EVDO in Dalian section of high-speed railway, this paper gives the strategy of coverage optimization of high-speed rail mobile network, and accumulates the experience of optimization, and hopes to pass through this study, in order to improve the network quality of EVDO in Dalian section of high-speed railway. A set of perfect optimization ideas are formed in the coverage optimization of high-speed rail mobile network, and finally provide satisfactory mobile network usage perception for 3G users on high-speed rail. At the same time, this paper also through the CDMA network coverage signal quality optimization of Dalian high-speed rail network after re-testing, the entire system has been effectively adjusted, the last indicators have a very obvious improvement, the optimization effect is remarkable.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TN929.533

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本文編號：2019235