... 1 System structureCIR is a wireless communication terminal unit for driver. It can provide the function ... contains the Control unit,GPS unit,Record unit,GSM-R voice unit,GSM-R data unit,450MHz function unit,Power unit.It is shown ... in Table 2 as follows:3.2 Power ConsumptionThe power of CIR is all offered by main ... peak consumption of CIR is 106W.It requires power supply of the train larger than 300W. ...