【正文】 Tibet railroad train wireless network demand, we decided uses the wireless netted network to realize the munication, meanwhile may realize:實現(xiàn)列車內(nèi)部無線信號良好覆蓋 Realization train interior wireless signal good cover滿足乘客、列車工作人員在旅途中的無線上網(wǎng)需求Satisfies the passenger, the train staff wireless accesses the net in the journey needs提供WiFi語音業(yè)務(wù)，實現(xiàn)列車工作人員的內(nèi)部免費通話 Provides the WiFi pronunciation service to realize train staff39。s industry ring net Ethernet switchboard EDS518A, this switchboard has two kilomega electricity orifice, may set up kilomega ring nets, the equipment in the partment uses other 16 10/100M electricity orifice. Two electricity orifice uses for meeting each partment two wireless plugin point AP (can elect), two electricity orifice meet the singlechannel monitoring server which two monitoring camera uses, A electricity orifice uses in each partment’s monitor workstation, the surplus Ethernet electricity orifice uses in the VOD system which meets in the partment tip box and the RJ45 plug in which the wired data turns on and so on. Moreover, the IC card partment door also needs a RJ45 orifice corresponds with the administrative center. If the passenger telephone munication system uses the wireless MESH technology, wireless plugin point AP could omit, the passenger who uses wireless net may turn on the MESH system to realize. So train LAN mainly services for the special partment for the wired data、the monitoring、the IC card door and the VOD system and so on. 系統(tǒng)圖System Diagram局域網(wǎng)系統(tǒng)示意圖如下所示：LAN diagram as follows shows:注：上圖中如果采用無線網(wǎng)格（MESH）通信，無線接入AP可以省去Note: in chart if uses the wireless MESH to correspond, wireless turns on AP is allowed to omit（二）因特網(wǎng)接入服務(wù)系統(tǒng)Internet Turns on the Service System技術(shù)選型Product Election由于列車的移動特征，本方案選用無線接入方式。s product, its median line cable uses six UTP the 1071004ESL line cable, the module uses the MGS400BH262 module, the board uses stainless steel Englishtype with dustproof cap board M12SP (double hole). Between the partment and the other uses the specialpurpose data Jumper connection. In the partment the data wired plugin point also uses six UTP line cable, will satisfy the future band width to expand acmodates39。那么沒有更好的產(chǎn)品或解決方案呢？答案是肯定的，就是采用目前技術(shù)日益成熟的工業(yè)環(huán)網(wǎng)以太網(wǎng)交換機。 集中管理控制系統(tǒng)。Regarding power source question, because the train already met the pair of road uninterrupted power supply requirement, therefore the UPS power supply already solved. Because on the train power source majority is 110 volts directcurrent power supplies, but we select the equipment power supply is the 220V exchange majority in this plan, therefore must carry on the contra variant transformation. According to equipment quantity in each partment, we design in each partment lay a 1KVA contra variant power source (input 10VDC, output 220VAC), the monitoring center (Kitchen dinning car) lays a 2KVA contra variant power source. This plan selects the specialpurpose contra variant power source for the Guangdong EAST product, the correspondence base center massive uses in the Qinghai and Tibet rail line nobody value, which defends underwent the plateau, the low atmospheric pressure, the low temperature and so on .（五）系統(tǒng)總體規(guī)劃System overall plan根據(jù)客戶的要求，并結(jié)合當(dāng)前主流智能化系統(tǒng)的技術(shù)特點及列車的特殊要求，我們?yōu)檫M(jìn)藏列車的智能化系統(tǒng)設(shè)計規(guī)劃了以下子系統(tǒng)：According to the customer request, the parallel connection gathers the current mainstream intellectualization system the technical characteristic and the train special request, we for came into Tibet the train intellectualization system design to plan below the subsystem: 列車局域網(wǎng)通信系統(tǒng)；LAN Communication System。Because this design is serves to the train which es into Tibet, Tibet plateau cold special environment to equipment election influence heavily, the temperature and the elevation in particular. Therefore to the various intellectualized subsystems, essential equipment must possibly meets in Tibet in the low temperature environment can normal work. This plan according to the operating temperature 20℃ ~ 60℃, the preserve temperature 45℃ ~ 70℃ scopes designs.本方案中的環(huán)網(wǎng)以太網(wǎng)交換機、工業(yè)接入AP、服務(wù)器、磁盤陣列、攝像機、衛(wèi)星接入設(shè)備、IC卡門鎖等均選用能在低溫環(huán)境下正常工作。 GB5016992《電氣裝置安裝工程接地裝置施工及驗收規(guī)范》178。 新建時速200公里客貨共線鐵路設(shè)計暫行規(guī)定 TB1006399 鐵路工程設(shè)計防火規(guī)范178。 TB1000498 鐵路機務(wù)設(shè)備設(shè)計規(guī)范178。Each subsystem is interdependence and the relative independence. This guaranteed the system structure extension, causes the system along with the technical development and the progress, unceasingly obtains the enrichment and the enhancement. In this system， the product collects international, domestic general product, follows the general interface standard, and expanded for the system promotion allows to lay the foundation.安全性、可靠性Security And Reliability設(shè)計時我們充分考慮了各子系統(tǒng)供電、低溫、防雷、抗震等問題，對整個系統(tǒng)的安全運行也作了完善的設(shè)計。Constructed the Qinghai and Tibet railroad, is the significant strategy which the Central Party Committee, the State Council makes，is a sign project of west development, speeds up the Qinghai and Tibet railroad construction item autonomous region and Qinghai various races people many years’ hope, is the new and older Chinese generation leader and several generation of railroads constructors39。另外，還注冊擁有某通軟網(wǎng)絡(luò)科技有限公司、某信馳電子有限公司、某聚誠電子有限公司、某市易貨交易中心等四家獨立公司。青藏鐵路大部分路段處在無人煙的區(qū)域，沿途通訊無法得到保障，本項目就是為了滿足乘坐青藏鐵路的旅客在旅途中的上網(wǎng)、通話以及列車內(nèi)部的各種現(xiàn)代化需求。This plan is our pany for es into Tibet the design proposal which the train intellectualization system does, is engaged in the intellectualized integration according to the intellectualized weak electricity system function characteristic with our pany many years the experience, in view of the train function demand to design. In the plan both has exhaustively analyzed each system function and the disposition, and has manifested the digitization, information this distinct characteristic with emphasis.某電子開發(fā)有限公司是某最大的弱電系統(tǒng)集成公司之一，也是從事小區(qū)/大廈智能管理系統(tǒng)、安防電子工程、計算機信息系統(tǒng)的設(shè)計安裝、軟件開發(fā)、電子產(chǎn)品開發(fā)、工程和售后服務(wù)于一體的綜合性專業(yè)公司。The pany collects research and development, Production, Sale, Project, Postsale service to a body. We have set the system inte