JPH1146169A - Radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably operate the system with high reliability by providing a control station with a 2nd controlling means that verifies the validity of data of a control signal. SOLUTION: A microprocessor 1 generates a control signal. An MSK level converter 2 converts a control signal generated by the microprocessor 1, e.g. into an MSK level. Radio equipment 3 sends it to a terminal station 6 after converting a control signal on an MSK level into a radio frequency band to be used. A TTL level converter 4 converts the control signal on the MSK level into a TTL level. A microprocessor 5 performs validity check about whether or not the control signal that is converted into the TTL level by the converter 4 is normal data and performs resetting of the microprocessor 1 in the case of abnormality. Thus, the microprocessor 1 generates normal data again when the microprocessor 5 resets the microprocessor 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a radio communication system, and more particularly to monitoring operation of a control signal transmitted via a control channel in a radio channel.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, in a wireless communication system including a control station and a terminal station, the operation of a control signal transmitted via a control channel is not monitored, and data of the control signal is generated. It is only necessary to check whether the operation of the microprocessor 1 is normal.

[0003]

As described above, in the conventional radio communication system, there is no function of monitoring important control signals, and even if other functions are operating, if the control signals are stopped. Since the call processing from the terminal station cannot be performed, the system has been stopped from the viewpoint of the terminal station. As described above, the conventional technique has a disadvantage that it is not possible to recognize that the system has stopped. The present invention
An object of the present invention is to provide a wireless communication system which eliminates this drawback and can operate stably with high reliability.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a control station for monitoring a control signal, such as an MSK (Minimum Shift Keyin).
g) After demodulating the signal and converting it to a TTL level, the signal is input to a microprocessor to check the validity of the signal.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. In FIG. 1, reference numeral 1 denotes a microprocessor which generates a control signal. Reference numeral 2 denotes a control signal generated by the microprocessor 1, for example, MSK (Minimum Shift Ke
ying) Convert to level. Reference numeral 3 denotes a radio, which converts the control signal of the MSK level into a radio frequency band to be used, and transmits it to the terminal station 6. Reference numeral 4 denotes a level converter for changing the control signal of the MSK level to the TTL level. In step 5, the microprocessor 1 checks whether the control signal changed to the TTL level is normal data or not, and resets the microprocessor 1 in the case of abnormality. As described above, the microprocessor 5 resets the microprocessor 1 so that the microprocessor 1 generates normal data again.

[0006]

According to the present invention as described above, the reliability of the system can be improved. That is, since the terminal station 6 always receives a normal control signal and can connect to the wireless line, the validity of the control signal data received by the terminal station is improved, and the reliability of the system is improved. Can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a block diagram showing an example of a conventional communication system.

[Explanation of symbols]

1: Microprocessor, 2: Minimum Shift
Keying level translator, 3: radio,
4: TTL level converter, 5: microprocessor,
6: Terminal station.

Claims (2)

[Claims] 1. A control station comprising a control station and a terminal station, the control station having first control means for generating a control signal, wherein the control signal is transmitted from the control station to the terminal station via a radio line. A wireless communication system according to claim 1, wherein said control station includes second control means for verifying validity of data of said control signal. 2. The wireless communication system according to claim 1, wherein the second control means verifies the validity of the data of the control signal, and when the abnormality is detected, the first control means A wireless communication system configured to provide a reset signal.