本文選題：TETRA數(shù)字集群系統(tǒng)　切入點(diǎn)：基站子系統(tǒng)　出處：《北京交通大學(xué)》2017年碩士論文

【摘要】：TETRA數(shù)字集群通信系統(tǒng)是基于時(shí)分多址方式的專業(yè)移動(dòng)通信系統(tǒng),主要應(yīng)用于公安、安全、消防、軍隊(duì)、交通、政府等部門的指揮調(diào)度。TETRA數(shù)字集群基站負(fù)責(zé)無線資源管理,實(shí)現(xiàn)固定網(wǎng)絡(luò)與移動(dòng)用戶之間的通信連接,傳送信號(hào)和用戶信息。當(dāng)TETRA數(shù)字集群系統(tǒng)含有多個(gè)基站時(shí),基站同步技術(shù)用于移動(dòng)臺(tái)進(jìn)行小區(qū)搜索和越區(qū)切換。因此,TETRA數(shù)字集群基站同步技術(shù)是TETRA數(shù)字集群系統(tǒng)開發(fā)的關(guān)鍵技術(shù)之一。本論文在綜述了國(guó)內(nèi)外各種移動(dòng)通信系統(tǒng)基站同步技術(shù)的基礎(chǔ)上,首先分析和比較了各種移動(dòng)通信系統(tǒng)的同步技術(shù),根據(jù)TETRA數(shù)字集群系統(tǒng)的組成和基站子系統(tǒng)的工作過程,分析了 TETRA數(shù)字集群基站的同步功能,設(shè)計(jì)了基站同步誤差的抑制方法,并對(duì)基站同步技術(shù)和同步方式進(jìn)行分析和對(duì)比,選擇最佳的基站同步技術(shù)和基站同步方式;然后,基于OPNET仿真軟件,利用C語(yǔ)言,搭建了 TETRA數(shù)字集群系統(tǒng)的網(wǎng)絡(luò)、進(jìn)程、節(jié)點(diǎn)模型,設(shè)計(jì)了交換機(jī)(MSC)、交換設(shè)備以及基站控制器(BSC)的狀態(tài)轉(zhuǎn)移圖,給出了各節(jié)點(diǎn)同步誤差的仿真測(cè)量結(jié)果,分析了基站數(shù)量和基站間距離對(duì)基站同步性能的影響,確定基站同步方案;其次,基于Linux操作系統(tǒng),利用C語(yǔ)言,開發(fā)了 MSC側(cè)主時(shí)鐘同步軟件、BSC側(cè)從時(shí)鐘同步軟件以及BTS與BSC之間不同授時(shí)模式同步軟件,實(shí)現(xiàn)了基于1588協(xié)議的BSC與MSC間的同步和基于三模授時(shí)同步卡的BTS與BSC間的同步。最后,基于Windows操作系統(tǒng),利用Xshell工具和Wireshark工具,通過TETRA數(shù)字集群協(xié)議分析儀捕獲TETRA數(shù)字集群的空口數(shù)據(jù),對(duì)基站同步進(jìn)行了功能測(cè)試和精度測(cè)試,測(cè)試結(jié)果滿足設(shè)計(jì)需求。
[Abstract]:TETRA digital trunking communication system is a professional mobile communication system based on time division multiple access (TDMA). It is mainly used in the command and dispatch of public security, security, fire fighting, military, traffic, government and other departments. TETRA digital trunked base station is responsible for wireless resource management. Realize the communication connection between fixed network and mobile user, transmit signal and user information. When TETRA digital trunking system contains multiple base stations, The technology of base station synchronization is used for cell search and handoff of mobile stations. Therefore, the synchronization technology of Tela digital trunked base station is one of the key technologies in the development of TETRA digital trunking system. This paper summarizes all kinds of mobile communications at home and abroad. Based on the synchronization technology of system base station, Firstly, the synchronization technology of various mobile communication systems is analyzed and compared. According to the composition of TETRA digital trunking system and the working process of base station subsystem, the synchronization function of TETRA digital trunked base station is analyzed. This paper designs a method to restrain the synchronization error of base station, analyzes and compares the synchronization technology and mode of base station, and selects the best synchronization technology and synchronization mode of base station. Then, based on the simulation software of OPNET, using C language, The network, process and node model of the TETRA digital trunking system are built. The state transition diagram of the switch, switching equipment and base station controller is designed, and the simulation measurement results of the synchronization errors of each node are given. The effect of base station number and distance between base stations on base station synchronization performance is analyzed, and the base station synchronization scheme is determined. Secondly, based on Linux operating system, C language is used. The slave clock synchronization software of MSC side and the synchronization software of different timing modes between BTS and BSC are developed. The synchronization between BSC and MSC based on 1588 protocol and between BTS and BSC based on three-mode timing synchronization card is realized. Finally, based on Windows operating system, Xshell and Wireshark tools are used. The empty data of TETRA digital trunking are captured by TETRA digital trunking protocol analyzer, and the function and precision of base station synchronization are tested. The test results meet the design requirements.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN929.52

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本文編號(hào)：1686626