JPS60162321A - Circuit control system for mobile radio communication system - Google Patents

Abstract

PURPOSE:To inhibit the transmission of signals to a faulty channel from a mobile station by monitoring the state of a receiver at a base station and breaking the idle line signal of the faulty channel when the receiver has a fault. CONSTITUTION:When a receiver RxCHA has a fault, a fault detecting relay ALA301 of a CHA receiver works to open its contact ala. Therefore the idle line signal given from an idle line signal generator 201 is not connected to a channel conversion part CHA202. Then the idle line signal sent from a base station is cut off. The same state is obtained in receivers CHB-CHN. Thus it is inhibited to transmit signals to a faulty channel from a mobile station by cutting off the idle line signal of the faulty channel.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a line control system in a mobile radio communication system between a plurality of mobile stations and a plurality of base stations.

(Prior art and its problems) In general, in a mobile radio communication system, when a channel is vacant, a base station sends a blank signal to the vacant channel, and the mobile station transmits a blank signal to the vacant channel.

A call can be made when this idle line signal is being received.

In the system schematic diagram of FIG. 1, a conventional connection method will be explained. 101 is a mobile station, and 102 is a base station.

103 is a base station antenna, 104 to 105 are approach lines between the base station and the control station, 106 is a control station, and 107 is a telephone on the control side. Ct-+A at the base station 102
If the line is empty, an empty line signal is being sent to the CHA.

When the mobile station 101 makes a call, the CHA makes the call and the number is 10.
1-1.03-102-104-106-107. When connected, the control station 106 controls the CHA antenna signal of the base station 102 to be disconnected, thereby preventing other mobile stations from talking on the same base station and on the same channel and causing interference.

The operation of this base station will be explained in detail with reference to FIG. C
If HA is empty, an empty line signal is sent from the empty pure signal oscillator 201 through the contact cha of the relay CHA (not shown) to the two communication path converters CIA 202, coupler 203, transmitter 204. The signal is transmitted to the mobile station through antenna 205. When a mobile station makes a call using CHA, antenna 2052, distributor 206. The signal is received by a receiver RXCHA 207 and connected to a control station (not shown). At the control station, in order to operate the relay CHA (not shown), contact cha
is opened and the idle signal at the CHA is disconnected.

In this type of system, even if there is some kind of failure in the base station receiver, the control station controls the antenna signal, so the mobile station will be able to transmit if it transmits on the channel of the failed receiver. The drawback was that it could not be connected. In particular, when a mobile station prioritizes outgoing channels, if the receiver of the channel with the highest priority is in trouble, connection is almost always impossible.

(Objective) In order to solve these drawbacks, the present invention monitors the status of the receiver at the base station, and if the receiver becomes impaired, the idle signal of the CH corresponding to the receiver is cut off, and the mobile station Therefore, it is made impossible to make a call on the faulty Cl-1.

(Example) An embodiment of the present invention will be described below with reference to FIG.

If the receiver RXCHA is not in trouble and the CHA is empty, the empty line signal oscillator 201 sends the empty line signal to contact ala.

9 through the channel converter Cl-lA202. Combiner 203° transmitter 204. The signal is transmitted to the mobile station through antenna 205.

When a mobile station sends a call via CHA, it is received by the antenna 205, distributor 206 receiver RX CHA 207.

It is connected to a control station (not shown). At the control station, contact c is used to operate relay CHA, which is not shown.
ha is opened and the idle signal at CHA is disconnected.

If the receiver RX CHA 207 has a failure, the failure detection relay ALA of the CHA receiver operates, and its contact ala
is open, the idle line signal is transferred to the communication path converter CHA20.
2, and the idle signal is disconnected from the base station to the CHA. The same applies to CHB'-CHN.

(Effects) As explained above, according to the second aspect of the present invention, the idle signal of the faulty Cl-1 is cut off, so even if the mobile station transmits a signal, it does not detect the fault, so it is less likely to be unable to connect. .

[Brief explanation of drawings]

FIG. 1 is a system schematic diagram, FIG. 2 is a conventional line control method, and FIG. 3 is a line control method according to the present invention. 101: Mobile station, 102: Base station, 106: Control station. 202: Communication path converter, 203: Combiner, 204: Transmitter, 205: Antenna, 206: Distributor, 207: Receiver, 301: Relay for detecting receiver failure. Agent Patent Attorney Akio Takahashi

Claims (1)

[Claims] The mobile station is composed of a central station (control station), multiple fixed stations (base stations), and a mobile station, and the mobile station has a channel-compatible antenna signal transmitted from the base station under the control of the control station. In a mobile radio communication system, it is possible to make a call, but it is impossible to make a call if there is no idle line signal.
A line control method in a mobile radio communication system, characterized in that, in the case of a failure in a receiver at the base station, the idle signal of the channel corresponding to the receiver is cut off.