Method of checking amount of transmitted data

And user equipment during network connection between basic device, and a on the basic network device with through the data and related first instruction of transmission connection, and maintaining of the user equipment with the data and related second instruction of transmission. Closed to the inspection preset value to respond (402), a trigger testing program. The testing program product for integrity protection the signal. During testing program, compared with the second indication the first indicating. The testing program can be very easy for discover through and mobile station in network the legitimate connected between the basic transmission and/or receiving data, so the data transmission and a intruder of the mobile station is undertaken.