Metro Lines Asked to Temporarily Block 3G Wi-Fi Devices
The Shenzhen Metro Co. is asking the city radio management authority to temporarily block 3G signals on its Metro trains. This move potentially affects passengers using smart phones or tablet computers. The request is to allow further testing after last week’s disruption of the metro services due to Wi-Fi signals. Authorities have yet to respond to the request and are still unclear whether this type of request will be implemented.
The Metro is still investigating is Wi-Fi devices are causing brief train stoppage on the Shekou line where several trains suddenly stopped. The city radio administration has organized a signal test of the Shenzhen Metro and telecom operators after the train stoppage incident, which showed that Wi-Fi signals from passengers’ mobile devices might have affected the Metro systems but results are still conclusive.
Although telecom operators already suggested that the Metro to change their frequency of their signal system, they will still cooperate with them if the city radio administration will require them to do so. Shenzhen Metro is suspecting that the source of this problem is the 3G MiFi a Wi-Fi service provided by China Mobile.
The Wi-Fi service caused the Metro trains to initiate its automatic protection mode forcing them to operate in less than full speed, forcing passengers to transfer to other lines or use a different form of public transportation.