JPS6173440A - Monitoring system of repeater station - Google Patents

Abstract

PURPOSE:To restore quickly a trouble and to prevent a system from system down by sending forcedly a monitoring signal for a fixed period from a repeater station to a base station when the repeater station is at fault, and also after the passage of the fixed period, sending the monitoring signal superposed to a voice at a low level to the base station and a mobile station. CONSTITUTION:When a trouble is generated in the repeater station A, a signal outputted from a fault signal connecting terminal 7 is supplied to a remote supervisory control part 6, and at that time, a timer control part 8 is actuated to control a repeater control part 5 for a fixed period and send a monitoring signal to the base station. After the passage of the fixed period, the signal sending level from the control part 6 is reduced, and every reception of the monitoring signal, a low-level monitoring signal superposed to a voice signal is sent under control by the control part 5. A base station device B receives said monitoring signal and displays the signal on a control display part 9. The display part 9 displays the trouble when the monitoring signal has been received for a fixed period, but even if said signal is not received, the status of the repeater station can be monitored by the low-level monitoring signal superposed to the voice obtained from a speaker. Similar operation is applied also to a mobile station.

Description

[Detailed Description of the Invention] (Technical Part! Lij.) The invention relates to an improvement of a relay station monitoring method in a mobile afυ wireless communication system.

(Conventional (Shijutsu and its problems) The conventional relay station monitoring method is based on relay station failure (1 = ! electricity).

In the event of an abnormal temperature, malfunction of major equipment, intruder, etc., the relay station would send a monitoring signal to the base station for a certain period of time, and the base station would receive the monitoring signal and display the status. However, in this system, if the base station is absent or if the monitoring signal is not properly transmitted for a certain period of time, there is a risk that recovery will be delayed or a system down will occur because the fault status is unknown.

(Purpose) In order to monitor the status of a relay station at a base station and a mobile station, the present invention forcibly sends a monitoring signal from the relay station to the base station for a certain period of time when a relay station fails, and when a certain period of time has elapsed. The system is characterized by transmitting a low-level monitoring signal superimposed on voice to the base station and mobile station, and is intended for early recovery from failures and prevention of system downtime.

(Example) Figures 1 and 2 are examples of the present invention. Figure 1 is a relay station equipment system diagram, and Figure 2 is a base station equipment system diagram. A bag switching unit, 3 is an inter-base station receiver, 4
is a base station transmitter, 5 is a relay control unit, 6 is a separate remote monitoring unit, 7 is a fault signal connection terminal, 8 is a timer control unit, 9
1 is a receiver in the mobile station, 10 is a mobile station transmitter, 11 is an antenna switching section, 12 is an antenna for the mobile station, 13 is an antenna in the relay station, 14 is an antenna switching section, 15 is a relay station receiver,
Reference numeral 16 indicates a relay phase transmitter, 17 a signal receiving section, 18 a transmission control section, and 19 a j-interval display section.

First, the operation of the relay station device shown in FIG. 1 will be explained. Radio waves from the base station are received by the inter-base station receiver 3 through the base station antenna l and the aerial switching unit 2, and the received signal and reception output are supplied to the relay control unit 5. The relay control section 5 receives the received signal and controls the mobile station transmitter 10, and the antenna switching section 11. It is transmitted to the mobile station through the inter-mobile station antenna 12.

Also, the radio waves from the mobile station follow the reverse route of the radio waves from the base station, and the mobile station antenna 12. The signal is supplied to the relay control section 5 through the antenna switching section If and the mobile station receiver 9, controls the base station transmitter 4, and is transmitted from the base station antenna 1 to the base station through the antenna switching section 2. Next, when a fault occurs at the relay station, a signal from the fault signal connection terminal 7 is supplied to the remote monitoring control unit 6, and at this point the timer control unit 8 operates to control the relay control unit 5 for a certain period of time. , the monitoring signal is sent to the base station transmitter 4° antenna switching unit 2. It is transmitted to the base station through the base station antenna 1. After a certain period of time has elapsed, the level of the signal sent from the remote monitoring control unit 6? Each time the mobile station receives a signal from the base station, it sends a low-level monitoring signal superimposed on the voice signal to the relay control unit 5 under Kl''1 control.

Next, the operation of the base station device shown in FIG. 2 will be explained. The monitoring signal from the relay station is supplied to the receiver 15 through the relay station antenna 13° antenna switching section 14, and is displayed on the control display section 19 via the signal receiving section 17.

In the control display unit 19, a fault is displayed using a lamp, a buzzer, etc. when a monitoring signal is received for a certain period of time. The status of a relay station can be monitored using a high-level visual signal.Similarly, the status of a relay station can be monitored at a mobile station using a low-level monitoring signal superimposed on an audio signal.

(Effects) As explained above, according to the present invention, it is possible to reliably monitor the failure status of relay stations at base stations and mobile stations, and prevent system downtime by performing early recovery from failures. Not only can this be done, but the wireless line can be used effectively.

[Brief explanation of the drawing]

! #1 and FIG. 2 are a relay station device system diagram and a base station device system diagram according to an embodiment of the present invention. 1.12.13: Antenna, 2,11,14:
Aerial switching section. 3, 9, 15: Receiver, 4.10.16: Transmitter, 5: Relay control unit, 6: Remote monitoring control unit, 7: Fault signal connection terminal, 8: Timer control unit, 17: Signal reception Section, 18: Sending side @1 section, 19: Control display section. t to 1 shi: /, J to 2nd day

Claims (1)

[Claims] In a mobile radio communication system composed of a base station, a relay station, and a mobile station, the relay station operates a timer when a failure occurs in its own station, and forcibly sends a monitoring signal to the base station for a time set by the timer. In addition, after the timer setting time has elapsed, a supervisory signal whose transmission level is lowered is superimposed on the audio signal and transmitted to the base station and the mobile station, and the failure state is monitored using the supervisory signal and the low-level supervisory signal. Relay station monitoring method.