JPH05327632A - Base station monitor - Google Patents

Abstract

PURPOSE:To attain the state monitor of the entire communication system between base stations without increasing peak power of a transmission signal by allowing a central base station to superimpose a monitor control signal onto the transmission signal at the time of an idle burst allowing each radio base station to extract the monitor control signal and sending back the control signal to the central base station through the use of idle burst of an incoming line signal. CONSTITUTION:A synthesizer 15 at a central base station superimposes a monitor control signal generated by an oscillator 9 synchronously with an idle burst of an outgoing line onto a transmission signal, a distributor 16 at a radio base station side receives the monitor control signal sent from the central base station, a monitor control signal extraction device 4 extracts the monitor control signal synchronously with the signal, a multiplexer 21 superimposes the control signal onto the transmission signal synchronously with the idle burst of the incoming line again and the result is sent to the central base station side. The monitor control signal sent from the radio base station side is sent to the central base station side, and a monitor circuit 6 at the central base station side extracts the monitor control signal synchronously with the idle burst of the incoming line to implement the monitor control for the entire base station.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base station monitoring device for monitoring a base station device. More specifically, the transmitter / receiver is installed in the toll base station, the transmitter / receiver antenna is installed in the radio base station, and the radio base station and the toll base station are connected by a transmission line, and the transmitter / receiver device and the transmitter / receiver antenna are connected. The present invention relates to a base station device in a system including a transmission line between full-duplex base stations for transmitting signals between the base station device and a monitoring device for monitoring the state of the transmission line.

[0002]

2. Description of the Related Art FIG. 6 is a diagram showing an example of the configuration of a conventional monitoring device for monitoring a base station device. 6 is a monitoring circuit, 13 is a monitoring device, 14 is an antenna, 15 is a combiner,
Reference numeral 16 is an extractor, 10 is a centralized base station, 18 is a timing signal extraction circuit, 20 is a radio base station, and 30 and 31 are transceiver devices. As shown in the figure, conventionally, the toll base station 10 and the radio base station 20 are connected by a transmission path, and the toll base station 10 superimposes a signal using a carrier frequency for a supervisory control signal, In the wireless base station 20, the centralized base station 10
The monitoring control signal sent from the wireless base station 20 is extracted and monitored by the monitoring device 13 provided in the wireless base station 20 to monitor the states of the transmission line and the device. On the side of the radio base station 20, the monitoring device 13 superimposes a supervisory control signal on the main signal using the carrier frequency for the supervisory control signal, and sends it to the toll base station 10. The toll base station 10 monitors from this signal. The control circuit is extracted and the monitoring circuit 6 monitors the inter-base station device.

[0003]

As described above, conventionally, the centralized base station side superimposes the supervisory control signal using a frequency different from the main signal, and the radio base station side extracts the signal. The monitoring circuit of the wireless base station was monitoring. In addition, in the uplink, the signal is sent to a transmitter / receiver for monitoring.

Therefore, there has been a problem that the peak power of the transmission signal between the base stations increases and a carrier frequency dedicated to the supervisory control is required. INDUSTRIAL APPLICABILITY The present invention requires a carrier frequency dedicated to supervisory control in a full-duplex line connecting a centralized base station and a wireless base station for communication using the TDD communication method without increasing peak power between the base stations. In addition, it is still another object of the present invention to provide a monitoring device capable of monitoring the wireless base station device and the entire transmission path.

[0005]

According to the present invention, the above-mentioned problems can be solved by the means described in the claims. That is, according to the present invention, a transmission / reception antenna is arranged in a radio base station, and a transmission / reception device corresponding to the transmission / reception antenna is arranged in a toll base station. A transmission line for an uplink line to the wireless base station and a transmission line for a downlink line from the toll base station to the wireless base station are provided, and a transmission / reception signal is transmitted between the toll base station and the wireless base station using the above transmission line. A base station monitoring device for monitoring and controlling a wireless base station of a digital communication system for performing time division two-way communication, wherein a timing signal extraction circuit for detecting an empty burst of a transmission / reception signal on the centralized base station side,
An oscillator used to superimpose a supervisory control signal on an empty burst of a downlink signal, a means for inserting this into the main signal in synchronization with the downlink burst signal, and a supervisory control signal of the uplink signal to the uplink burst signal. A means for synchronously extracting and a monitor circuit for monitoring the state of the extracted supervisory control signal, and means for extracting the supervisory control signal from the downlink signal in synchronization with the downlink burst signal on the base station side,
The base station monitoring device includes a multiplexing circuit that inserts the extracted supervisory control signal into an empty burst on the uplink in synchronization with the uplink burst signal.

[0006]

According to the present invention, the centralized base station side inserts a supervisory control signal into an empty burst and sends it to each downlink transmission line, and the radio base station side also inserts a supervisory control signal into an empty burst to produce an uplink transmission line. Since it is used and sent back to the centralized base station for monitoring, it does not increase the information amount and frequency band of the transmission signal, and there is no need to newly install a monitoring control transmission line, and the entire base station device is monitored. Can be done.

[0007]

1 is a diagram showing a first embodiment of the present invention. In the figure, reference numeral 1 denotes a transceiver connected to each zone by using the TDD communication system. In the transceiver, a supervisory control signal is transmitted from an oscillator 9 to each transmission line by a synthesizer 15 in synchronization with an empty burst. Are overlaid. The main signal on which the supervisory control signal is superimposed is optically converted by the electric / optical converter 2, and is converted to the original electric signal by the optical / electric converter 3 on the radio base station side 20.

On the side of each radio base station, the supervisory control signal extractor 4
The supervisory control signal is extracted by the multiplex circuit 21, and the multiplex circuit 21 synchronizes this with the empty burst of the upstream transmission line to thereby centralize the base station 10.
Send to the side. On the side of the centralized base station 10, the distributor 16 extracts the supervisory control signal from the uplink signal and the supervisory circuit 6 supervises it.

In the supervisory control, the timing signal extraction circuit 18 extracts a clock from the transmitter / receiver 1, and the control circuit 7 operates the oscillator 9 in synchronization with the empty burst based on the extracted clock. The monitoring circuit 6 monitors the entire base station device in synchronization with the above.

FIG. 2 is a diagram for explaining the flow of the supervisory control signal in more detail regarding the first embodiment of the present invention. In the figure, the centralized base station side superimposes the supervisory control signal generated by the oscillator 9 in the combiner 15 in synchronization with the idle burst of the downlink, and the wireless base station side transmits it from the centralized base station in the distributor 16. The monitor control signal is extracted by the monitor control signal extractor 4 in synchronization with the monitor control signal
This is again synchronized with the idle burst of the uplink and multiplexed in the multiplexing circuit 21 and transmitted to the centralized base station side. The supervisory control signal sent from the radio base station side is extracted by the supervisory circuit 6 by the supervisory circuit 6 in synchronism with the empty burst of the uplink on the centralized base station side, and the supervisory control of the entire base stations is performed.

FIG. 3 is a diagram showing a second embodiment of the present invention. In the figure, each part indicated by numeral reference is the same as that in FIG. The second embodiment shown in the figure is different from the first embodiment in that the centralized base station and the wireless base station are connected in a one-to-one relationship, and the operation of the supervisory control is the same as that described above. 1
This is the same as the case of the embodiment.

FIG. 4 is a diagram showing a third embodiment of the present invention. In the figure, the switches other than the switches indicated by numeral 19 are the same as those in FIG. The third embodiment is different from the first embodiment in that a switch 19 is used for superimposing and extracting the supervisory control signal on the centralized base station side. However, the operation of the monitoring control is the same as in the case of the first embodiment described above.

FIG. 5 is a diagram showing a fourth embodiment of the present invention. This embodiment is different from the first embodiment in that the operation of extracting and superimposing the monitor control signal on the radio base station side is performed immediately before the antenna section, but the operation of the monitor control itself is different from that of the first embodiment. This is similar to the case of the first embodiment shown in FIG.

[0014]

As described above, the present invention utilizes an idle burst or guard time of a signal, and at the time of this idle burst, the supervisory control signal is superposed on the centralized base station side, and each radio base station Since the station extracts the supervisory control signal and sends it back to the centralized base station side by utilizing the empty burst of the uplink signal, the entire base station communication system does not increase the peak power of the transmission signal. The status of can be monitored. Further, there is an advantage that it is not necessary to newly add a frequency for the supervisory control signal.

[Brief description of drawings]

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

FIG. 2 is a diagram illustrating a flow of a supervisory control signal according to the first embodiment of this invention.

FIG. 3 is a diagram showing a second embodiment of the present invention.

FIG. 4 is a diagram showing a third embodiment of the present invention.

FIG. 5 is a diagram showing a fourth embodiment of the present invention.

FIG. 6 is a diagram illustrating an example of a configuration of a device that monitors a conventional base station device.

[Explanation of symbols]

 1 Transmitter / Receiver 2 Electric / Optical Converter 3 Optical / Electric Converter 4 Monitoring Control Signal Extractor 6 Monitoring Circuit 7 Control Circuit 9 Oscillator 10 Centralized Base Station 13 Monitoring Device 14 Antenna 15 Combiner 16 Extractor 17 Amplifier 18 Timing Signal Extraction Circuit 19 Switch 20 Radio base station 21 Multiplexing circuit 30, 31 Transceiver

Claims (1)

[Claims] 1. A transmission / reception antenna is arranged in a radio base station, and a transmission / reception device corresponding to the transmission / reception antenna is arranged in a toll base station. Between the toll base station and the radio base station, the radio base station to the toll base station is provided. Provide a transmission path for the going uplink and a transmission path for the downlink going from the toll base station to the radio base station, and use the above-mentioned transmission line between the toll base station and the radio base station to transmit and receive signals. A base station monitoring device for monitoring and controlling a wireless base station of a digital communication system for performing time division two-way communication, comprising a timing signal extraction circuit for detecting an empty burst of a transmission / reception signal on a centralized base station side, and a downlink signal. The oscillator used to superimpose the supervisory control signal on the empty burst of the And a monitoring circuit for monitoring the state of the extracted supervisory control signal, and at the base station side, means for extracting the supervisory control signal from the downlink signal in synchronization with the downlink burst signal. A base station monitoring device, comprising: a multiplexing circuit that inserts the extracted monitoring control signal into an empty burst of an uplink in synchronization with the upstream burst signal.