Line 4G signal the Shanghai subway line opened: speed can go up to 100Mbps-Shanghai subway, 4G-IT information

"I see there's a strange girl on the subway, while on a cell phone make faces, a pout sultry hair, I leaned over and saw turned out to be live. "Miss often take Line 7 line subway in Shanghai found that subway 4G signal a lot recently, operations such as loading Web pages, games are very smooth, even underground, and high-speed road 4G 3G, does not have much impact. Meanwhile, peanuts that have been put into commercial operation the Metro Wi-Fi, as more and more people use, not even Miss Internet access speeds than ever before into the chapter's new obsession.

On July 5 and 6th, the Times reporter IT in peak and peak periods respectively, of Shanghai Metro, 1th, 2nd, 4th, 8th and 11th Internet tests, Line 13, 4G signal of the objects are the three major telecom operators and the Metro free Wi-Fi, good online experience than your correspondent is expected.

"Including the concourse and the platform tunnels, China Mobile and China Telecom's ' new five-line '4G signal in June across the opening. "One person in the 4G construction of subway operators told the Times reporter IT, transformation of the old metro line 4G has made some progress, opening interval 4G will try to finish by the end of this year.

Metro 4G speed test:

Unicom, the fastest most stable telecommunications

Most extensive mobile coverage

By December 2015, the total opening of Shanghai rail transit line 14 (line 1, Line 13, Line 16), 366 stations, the so-called "new five-line" refers to the end of 2012 opening of the Shanghai subway 5 metro lines, including Line 9 line North extension, Line 11, line two phase Eastern section of the line, Line 12, Line 13, line segment and Line 16.

During two days of testing, the same place and time (subject to environmental constraints, timing error is less than 2 minutes), using the same software--Speedtest speed, in six lines of 4G signal test, journalists randomly picked 10 sets of data for comparison, the three operators in terms of speed, coverage and signal stability there, there is also a short Board.

Evening rush hour (6 o'clock in the afternoon) line Line 2 Lujiazui station, China Mobile, China Telecom and China Unicom 4G download speed is 15.38Mbps, 49.20 Mbps, 103.78Mbps, download software and watch videos without Caton. However, China Unicom 4G speed although eye-catching, but in a moving subway car, had the greatest contrast, en route from Lujiazui to Jing an Temple, 4G speed in China Unicom fell to 5.39 Mbps mobile 24.39 Mbps, by contrast, China Telecom 4G speed most stable, 44.27 Mbps.

Flat peak Shi (3:30 P.M. to 4:30), similar of situation appeared in Shanghai railway station Line 1 line to Line 4 line of transfer channel in, in station Office in, mobile, and China Telecom and the China Unicom of 4G speed respectively is 23.29Mbps, and 48.99 Mbps, and 104.99 Mbps, transfer Shi, China Unicom phone displayed no service, reporter Hou in Line 1 line square to new gate road speed, China Telecom 4G speed still jumped site minimum, in 39. 03Mbps, China Mobile and China Unicom are 8.973Mbps and 7.133Mbps respectively.

From 10 set of test results is not difficult to see, in some of the station concourse, 4G the fastest in China Unicom, China Mobile's four times, but on the train, 4G speed in China Unicom has almost been halved; China Telecom between 29.24 Mbps to 49.68 Mbps, China Mobile between 18.02 Mbps to 26.36 Mbps.

"Characteristics of the three carriers obviously, fast China Unicom, China Mobile's coverage continued stronger than China Unicom, China Telecom, the speed faster than China Mobile, by contrast, China Mobile is the weakest link in speed. But on the whole, new five-line Internet experience to be better than the old line. "One person in the 4G construction of subway operators told the Times reporter IT.

According to the source, the new five-line resource construction of public communications facilities are borne jointly by the three operators, Metro construction, network construction is synchronous, 1th, 2nd and other old line of mobile network constructed by the shentong Metro system is leased to the carrier after use. Now, operators are 4G transformation to the old line, but some metro lines in the programme are still under discussion.

4G construction of Metro

"The Rooster crows at midnight"

"Underground station of Shanghai Metro operation sites in total, 266, number over more than 500 civilian communication equipment room, in addition to outside the Speedway and Yan Yulu station not yet in use, the remaining 264 underground stations were opened in March of this year all Telecom 4G signal station concourse. "Lu Wenhao is China Telecom Shanghai Branch Mobile Center project manager, when you sleep in the city, he and his partners were be moist air circulating in tunnel construction.

Carriers far harder than we think of tunnel construction. To Shanghai a week in advance not only operate companies apply for entry into the tunnel room point and interval work, a station can have no more than two nights a week access to subway parties arrangements. 12 o'clock midnight, telecommunications construction workers waiting to subway, carrying mobile devices to walk deep in the tunnel, construction time is only a short 3 hour, 3 points out. According to China Telecom insiders, China telecom equipment installation and commissioning tests of each station is about 1.5 times the other carriers, plus 1.8G and 2.1G two bands and two sets of equipment, they have been working overtime.

Due to the timing and progress of the construction hard to handle, long, 4G reforming needs to adjust the work plan objectives according to the actual situation. According to press reports, China Telecom has been to protect the underlying communications network systems, in addition to the regular line diagnostic test, also has a 7x24-hour monitoring and back analysis group.

Metro Wi-Fi speed is slightly slower but free

Internet in the Shanghai Metro, in addition to 4G, there is free Wi-Fi.

From last year began, by Shanghai Metro and South silver Valley common construction of "peanut Metro Wi-Fi" quietly in Line 13 line, and Line 7 line, main line began test, in IT times this year March of a article Shanghai Metro free Wi-Fi will commercial end of Qian completed signal cover of reported in the, one "peanut Metro Wi-Fi" of operation party force beauty media people introduced, "1, and 2, and 3, and 4, and 6, and 7, and 8, and 9, Metro line of Wi-Fi are has debugging success and online, also left 5, and 10, line 11, Line 12, issue 2, Line 13 Disney still debugging, is expected to achieve full coverage by the end. ”

At the time of testing the 4G network, reporter for "peanut Metro Wi-Fi" has also been speed, 15 sets of test data show, Metro Wi-Fi stability in 1.9Mbps at a rate of up to 2Mbps, even in the morning rush hour line Line 1, speed can be 1.92Mbps, can meet the basic brush page, users running game needs.

However, compared with the smooth online experience at that time, after 4 months of operation, "peanut Metro Wi-Fi" in the face of rush-hour Internet access needs, a bit "powerless". "With morning rush hour line Line 1, on my cell phone does not Wi-Fi, colleague's mobile phone to watch TV. "She complains to the Times reporter IT.

"If more and more users, load will definitely improve, connect error situation occurs, consider the expansion scheme. "A Chongqing Metro Wi-Fi operators IT times, a staff member told reporters.

In the March report, American media have been introduced, according to Shanghai daily 10 million subway passenger flow calculation, peanut Wi-Fi connection rate of the day of 40%, that is, 4 million daily subway passengers through the peanut free Wi-Fi Internet access. As more and more people know that peanuts Metro Wi-Fi, this number is likely to increase, intensive user, the lack of broadband combined with Metro signal interference and other factors, by user "Rob" Wi-Fi, a speed not even keeping up with surprise.

"Metro Wi-Fi has a set of solutions, despite the short Board in a fast-moving environment, but free and still is an advantage for Metro Wi-Fi signal coverage. "Fu Liang, independent telecommunications analyst said. Indeed, when reporters took four devices at the same time when speed, attracting many passengers crowd and whispered, that Metro has free Wi-Fi, everyone was surprised and immediately connect to choose Wi-Fi, almost the same reasons--free of charge.

4G construction of Metro Wi-Fi operators will impact? Fu Liang, free Wi-Fi is a public good in theory, with limited money to solve the problem of limited, must be absent, and the three operators ' networks complement each other. In addition, the Wi-Fi and 4G of engineering difficulty, Wi-Fi can complete a period of commitment in the contract, 4G construction is hard to do that, coupled with the difference in purpose between operators and the MTRC, 4G building is destined to be a long-term project.

上海地铁新五线4G信号全线开通：网速可飙至100Mbps - 上海地铁,4G - IT资讯

“我在地铁上看到有个女孩很奇怪，一会儿对着手机挤眉弄眼，一会又嘟嘴撩头发，我凑过去一看，原来是在直播。”经常乘坐上海7号线地铁出行的章小姐发现，最近地铁里的4G信号好了很多，加载网页、玩游戏等操作都很通畅，就算地铁在高速行进时4G变3G，也并无太大影响。同时，已投入商业运营的花生地铁Wi-Fi，随着使用的人越来越多，连不上网及网速不如从前成了章小姐的新困扰。

7月5日和6日，《IT时报》记者分别在高峰及平峰时段，对上海地铁1号、2号、4号、8号、11号、13号线进行了上网测试，对象分别是三大电信运营商的4G信号和地铁免费Wi-Fi，良好的上网体验超出了记者的预期。

“包括站台站厅和隧道区间，中国移动和中国电信的‘新五线’4G信号已在6月份全线开通。”一位地铁4G建设的运营商人士告诉《IT时报》记者，老地铁线路的4G改造也取得一定的进展，今年年底会尽量完成多区间4G开通。

地铁4G网速实测：

联通最快电信最稳定

移动覆盖最广

截至2015年12月，上海轨道交通共开通线路14条（1-13号线、16号线），车站366个，所谓“新五线”，是指上海地铁2012年底开通的5条地铁线路，包括9号线南延伸段、11号线北段二期、12号线东段、13号线一期东西段和16号线。

两天的测试过程中，相同的地点及时间（受环境限制，时间误差不超过2分钟），利用同一个测速软件——Speedtest，在对六条线路的4G信号测试之后，记者随机挑选了10组数据进行比较发现，三家运营商在网速、覆盖及信号稳定性上各有优势，亦存在短板。

晚高峰（下午6点）的2号线陆家嘴站台，中国移动、中国电信及中国联通的4G下载速度分别是15.38Mbps、49.20 Mbps、103.78Mbps，下载软件及看视频均无卡顿。不过，中国联通的4G速度虽然抢眼，但在行驶的地铁车厢内，反差也最大，从陆家嘴至静安寺途中，中国联通的4G速度降至5.39 Mbps，中国移动为24.39 Mbps，相较而言，中国电信4G速度最稳定，为44.27 Mbps。

平峰时（下午3点30分到4点30分），类似的情况出现在上海火车站1号线至4号线的换乘通道里，在站厅里，中国移动、中国电信及中国联通的4G速度分别是23.29Mbps、48.99 Mbps、104.99 Mbps，换乘时，中国联通手机显示无服务，记者后在1号线人民广场至新闸路测速，中国电信4G速度依然跳幅最小，在39. 03Mbps、中国移动与中国联通分别是8.973Mbps及7.133Mbps。

从10组测试结果不难看出，在一些站台站厅，中国联通的4G速度最快，中国移动的四倍，但在列车行驶时，中国联通的4G速度几乎被腰斩；中国电信在29.24 Mbps至49.68 Mbps之间，中国移动在18.02 Mbps至26.36 Mbps之间。

“三大运营商的特征很明显，中国联通速度快、中国移动覆盖广、中国电信的持续性比中国联通强，速度比中国移动快，相较而言，中国移动在速度上是最弱的一环。但总的来说，新五线的上网体验要比老线路好。”一位地铁4G建设的运营商人士告诉《IT时报》记者。

据该人士介绍，新五线的公众通信设施资源建设是由三家运营商共同承担，在地铁建设时，网络建设是同步的，而1号、2号等老线路的移动网络系统是由申通地铁建造后租给运营商使用。现在，运营商正对老线路进行4G改造，但有些线路的地铁区间方案仍在讨论中。

地铁4G建设

“半夜鸡叫”

“上海地铁地下站总共运营站点有266个，民用通信机房数量有500多个，除未投入使用的赛车场和严御路站外，其余264个地下站都已在今年的3月份全部开通站台站厅电信4G信号。”陆文皓是中国电信上海分公司移动建设中心的项目经理，当这个城市进入梦乡时，他和他的伙伴正在潮湿且空气难流通的隧道施工。

运营商隧道施工远比大家想得艰难。不仅要提前一周向申通运营公司申请进入隧道机房和区间工作点，一个站一周最多只能有两个晚上获得地铁方的安排。午夜12点，电信施工人员到地铁候场，肩扛手提设备往隧道深处走去，施工时间只有短短3个小时，3点就要撤出来。据中国电信内部人士透露，中国电信每站的设备安装调试测试量约是其他运营商的1.5倍，再加上有1.8G和2.1G两个频段和两套设备，他们一直在加班加点。

由于施工时间及进度难掌控，周期长，4G改造需要根据实际情况来调整工作计划目标。据记者了解，中国电信在保障地铁基础通信网络方面已成体系，除了定期的线路摸底测试外，还设有7×24小时监控及后台分析组。

地铁Wi-Fi网速稍慢但胜在免费

在上海地铁上网，除了用4G，还有免费Wi-Fi。

从去年开始，由上海地铁与南方银谷共同建设的“花生地铁Wi-Fi”悄然在13号线、7号线等主要线路开始测试，在《IT时报》今年3月的一篇《上海地铁免费Wi-Fi将商业化年底前完成信号覆盖》的报道中，一位“花生地铁Wi-Fi”的运营方力美传媒人士介绍，“1、2、3、4、6、7、8、9等地铁线路的Wi-Fi均已调试成功并上线，还剩下5、10、11、12号线2期、13号线迪士尼段仍在调试，预计年底前可以实现全覆盖。”

在对4G网络进行测试的同时，记者对“花生地铁Wi-Fi”也进行了测速，15组测试数据显示，地铁Wi-Fi的速率稳定在1.9Mbps至2Mbps，即使是在早高峰的1号线，速度也能达到1.92Mbps，能满足用户基本的刷网页、运行小游戏的需求。

不过，与当时顺畅的上网体验相比，经过4个多月的运营，“花生地铁Wi-Fi”在面对高峰时的上网需求时，有点“力不从心了”。“同是早高峰的1号线，我的手机连不上Wi-Fi，同事的手机却可看电视剧。”高小姐向《IT时报》记者抱怨。

“如果用户越来越多，负荷肯定会提高，出现连不上的情况，可以考虑扩容方案。”一位重庆地铁Wi-Fi运营商的工作人员告诉《IT时报》记者。

在3月份的报道中，力美传媒的相关人士曾介绍，根据上海单日1000万地铁客流计算，花生Wi-Fi的每日连接率为40%，也就是说，每天有400万地铁乘客通过花生Wi-Fi上网。随着知道花生地铁Wi-Fi的人越来越多，这个数字很可能会增加，用户密集、宽带不足再加上地铁信号干扰等因素，靠用户“抢”的Wi-Fi，速度跟不上甚至连不上不足为奇。

“地铁Wi-Fi有成套的解决方案，在高速移动的环境下虽然存在短板，但免费及信号覆盖依然是地铁Wi-Fi的优势。”独立电信分析师付亮说。事实确实如此，当记者拿着四个设备同时测速时，引来不少乘客的围观及窃窃私语，得知地铁有免费Wi- Fi，大家在惊讶之余马上选择连Wi-Fi，理由几乎相同——免费。

地铁Wi-Fi是否会对运营商的4G建设造成冲击？付亮表示，免费Wi-Fi理论上是公益性质，用有限的钱解决有限的问题，肯定会存在盲点，可以与三大运营商的网络相互补充。此外，Wi-Fi与4G的工程难度不同，Wi-Fi可以在合同中承诺某个时间段完成，4G建设很难做到这点，再加上地铁公司与运营商之间目的上的差异，4G建设注定是一个长期的工程。