日批在线视频_内射毛片内射国产夫妻_亚洲三级小视频_在线观看亚洲大片短视频_女性向h片资源在线观看_亚洲最大网

USEUROPEAFRICAASIA 中文雙語Fran?ais
China
Home / China / China

Shenzhen Metro disruption leads to calls to ban Wi-Fi devices on subways

By Huang Yuli in Shenzhen and Shi Yingying in Shanghai | China Daily | Updated: 2012-11-06 08:15

A subway operator in Shenzhen in Guangdong province is investigating whether passengers' portable Wi-Fi devices were the cause of a brief suspension of metro services on Thursday.

"Unknown signals", as the Shenzhen Metro Group put it, interrupted several trains on the city's Shekou line from 8:15 am to 9:30 am on Thursday, forcing many passengers to transfer to other lines. Others found themselves stranded.

The incident has attracted nationwide attention as more cities in China have started operating subway services. There has been much discussion as to whether portable Wi-Fi devices should be banned on metro lines to ensure their safe operation.

Because of interfering signals, the trains on the Shekou line stalled a number of times under the automatic protection mode or failed to operate at full speed.

Concerns rise over the Communication Based Train Control System - a railway signaling system that uses the telecommunications between the train and track equipment for traffic management and infrastructure control - which may be affected by Wi-Fi signals.

Chen Qi, deputy manager of the Shenzhen Metro, said on Monday that portable Wi-Fi devices may be the cause of the disruption, but there has been no final conclusion.

According to the operator, the Shekou line and Huanzhong line in Shenzhen use the CBTC system.

The incident has been the cause of much concern around the country, as first-tier cities such as Beijing and Shanghai are expanding their metro services, and second- and third-tier cities are building their own subway systems at a brisk pace.

Metro companies in a number of cities approached by China Daily on Monday said they never had services interrupted by unknown or Wi-Fi signals.

Shanghai Shentong Metro Group, the main operator of Shanghai's subway lines, said no signal interference has ever occurred on metros in the city despite metro lines 6 to 11 using the same CBTC system as their wireless communication system.

"But the interference is possible in theory," said Yang Di, a manager at Shentong.

Jia Peng, spokesman for Beijing Subway Operation Co, said the signal system of subway networks operated by the company never experienced problems like the case in Shenzhen and he firmly believes in the safety of Beijing's subway signal system.

"The CBTC system we use is the most widely used signal system in the world and also the most tested," he said.

Despite the confidence of some metro operators, mobile communication experts said it remains a concern that portable Wi-Fi signals can be a potential hazard to subways using CBTC systems.

Contact the writers at huangyuli@chinadaily.com.cn and shiyingying@chinadaily.com.cn

 

Editor's picks
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
主站蜘蛛池模板: 久久av喷吹av高潮av | 日韩av在线播放观看 | 亚洲天堂中文在线 | 免费黄色在线观看 | 国产麻豆自拍 | 999福利视频| 成人在线视频免费看 | 精品不卡一区 | 国产成人福利在线 | 国产美女福利在线 | 亚洲图片综合网 | 欧美一区二区三区久久久 | 99视频热| 午夜三级在线 | 日本片网址| 一区二区三区国产在线 | 欧美另类xxx| 99热精品在线观看 | 日本一本草久p | av网站免费在线观看 | av不卡在线| 久久亚洲精品国产 | 一道本在线视频 | 精品欧美久久 | 欧美日韩一区二区不卡 | 99热这里只有精品2 超碰在线网站 | 欧美精品三级 | 国产中文字幕一区二区 | 色综合视频网 | 在线观看国产91 | 婷婷日韩| 一级福利视频 | 天天看片天天爽 | 全部免费毛片在线播放高潮 | 福利视频一区 | 美国成人免费视频 | 免费在线看黄的网站 | 婷婷社区五月天 | 热99在线 | 2014天堂网| 欧美日韩国产免费观看 |