Due to congestion, pollution concerns, and the ever-increasing costs of fuel and parking, millions of people are getting off the roads and opting for trains as an alternative mode of transportation. For many passengers, their daily commute has translated into additional work time, and as a result they need to be reachable and able to communicate. Furthermore, onboard operators and riders alike are concerned about safety in the moving train; therefore, wireless connectivity is mandatory.
Ensuring cellular connectivity for passengers and train workers raises many challenges for operators of railways and for the manufacturers of railcars. Naturally, trains travel through a variety of terrains, including tunnels and metro areas, and they roll into underground stations. All of these environments can impede wireless signals.
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