JPH1032525A - Base station radio equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure communication between mobile stations by detecting a detection circuit detecting the disconnection of data communication to automatically turn back a transmission and reception signal when data communication is disconnected and a switch circuit for turning back the transmission and reception signal of a transmitter-receiver to turn-back-connect the transmission and reception of a base station radio equipment when a multiplex line is disconnected. SOLUTION: An outgoing signal from the multiplex line normally comes from a transmitter 1 through an antenna sharing device 3 to transmit radio waves from an antenna 4. On the other hand a radio wave from a mobile station is received by the antenna 4, demodulated by a receiver 2 through the device 3 and transmitted through a line. When a fault occurs at the multiplex line to disconnect a control line to disable data communication with a line controller, a detection part 5 detects the fault, controls a switch part 6 and turn-back- connects the speech path, the squelch and the press signal of the transmitter 1 and the receiver 2. Consequently a received signal from the mobile station is turned back to the transmitter 1 and sent from the antenna 4 again to enable communication between mobile stations.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base station radio apparatus for a mobile radio communication system.

[0002]

2. Description of the Related Art A conventional base station radio apparatus will be described with reference to FIG. As shown in FIG. 2, the transmitter 1 and the receiver 2 are combined by the antenna duplexer 3 and connected to the antenna 4. The input and output of the transmitter 1 and the receiver 2 are connected to a line controller via a multiplex line. However, if a failure occurs in the multiplex line and the line is disconnected, the base station becomes unusable.

[0003]

SUMMARY OF THE INVENTION As described above, an object of the present invention is to solve the problem that a base station radio apparatus cannot be used when a multiplex line is disconnected.

[0004]

In order to achieve the above object, the present invention detects a disconnection of a multiplex line and loops back a transmission / reception signal of a base station radio apparatus.

[0005]

FIG. 1 shows an embodiment of the present invention. In FIG. 1, 1 is a transmitter, 2 is a receiver, 3 is an antenna duplexer for sharing an antenna of a transceiver, 4 is an antenna, 5 is a detector for detecting a failure of a multiplex line, and 6 is a detector. Is a switching unit that loops back the communication path under the control of. Hereinafter, the operation of this embodiment will be described. In a normal state, the down signal from the multiplex line is transmitted from the antenna 4 via the transmitter 1 and the antenna duplexer 3, and the radio wave received from the mobile station is received by the antenna 4 and the antenna duplexer. 3
The signal is demodulated by the receiver 2 via the multiplexing line, and transmitted to the line control device via the multiplex line.

When a failure occurs in the multiplex line and the control line is disconnected and data communication with the line control device becomes impossible, the detection unit 5 detects the failure and controls the switching unit 6 to control the transmitter 1 and the receiver. The press signal is looped back and connected to the communication path 2 and the squelch. Therefore, when a failure occurs in the multiplex line, the received signal from the mobile station is looped back to the transmitter 1 and transmitted again from the antenna 4, so that the mobile stations can communicate with each other.

[0007]

As described above, according to the present invention, when a multiplex line is disconnected, transmission and reception of the base station radio apparatus are looped back, so that communication between mobile stations is ensured.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an embodiment of a base station radio according to the present invention.

FIG. 2 is a system diagram of a conventional base station radio apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Transmitter, 2 ... Receiver, 3 ... Antenna duplexer, 4 ... Antenna, 5 ... Detection part, 6 ... Switching part.

Claims (1)

[Claims] 1. A radio communication system comprising: a plurality of mobile stations; a plurality of base station radio apparatuses; and a line control apparatus connected to the base station radio apparatus via a multiplex communication path and a control line, and supervising all base station radio apparatuses. In a mobile system based on the wave press-talk system, when data communication is performed between the base station wireless device and the line controller and the data communication is interrupted, the data communication is interrupted because the transmission / reception signal is automatically turned back. A base station radio apparatus, comprising: a detection circuit for detecting the occurrence of a signal; and a switching circuit for returning a transmission / reception signal of the transceiver.