Mobile communication system, radio base station apparatus, operation control method therefor and program

An operation control method for a radio base station apparatus in a mobile communication system wherein a mobile station repeatedly transmits a predetermined preamble to a radio base station apparatus prior to transmitting a message to the radio base station apparatus until the mobile station receives an indication signal indicating that transmitting of the message is permitted or refused, said method comprising:

• the radio base station detecting the preamble from the mobile station;
• the radio base station apparatus transmitting the indication signal to the mobile station when the radio base station apparatus detects the preamble from the mobile station;
• and
• the radio base station determining whether a receiving of the indication signal by the mobile station is enabled or disabled based on detection information on the detected preamble,
• wherein a further action by the base station varies according to a result of the determining step, said further action comprising at least one of a control step of causing transmit power for the indication signal to be increased and a step of outputting an alarm signal.

A machine-readable recording medium on which is recorded a program for causing a computer to perform an operation control method for a radio base station apparatus in a mobile communication system wherein a mobile station repeatedly transmits a predetermined preamble to a radio base station apparatus prior to transmitting a message to the radio base station apparatus until the mobile station receives an indication signal indicating that transmitting of the message is permitted or refused, said method comprising:

• transmitting the indication signal to the mobile station when the radio base station apparatus detects the preamble from the mobile station;
• determining whether a receiving of the indication signal by the mobile station is enabled or disabled based on detection information on the detected preamble;
• and
• controlling a further action by the base station according to a result of the determining step, said further action comprising at least one of a control step of causing transmit power for the indication signal to be increased and a step of outputting an alarm signal.