JP2001168814A - Repeater connecting type system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repeater connecting type system where master slave communication about an operating state of a plurality of slave stations is conducted through optical signal transmission between a master station and the slave stations and that can reduce the installation cost and conduct stable operations. SOLUTION: A repeater 10 is provided between the master station 2 and each slave station 3. When each slave station 3 transmits state information to the repeater 10 on the basis of a monitor control instruction sent from the master station 2, the repeater 10 composites its own state information with the state information of each slave station 3 and transmits the composited information to the master station 2. Thus, the master station 2 can recognize the operating state of each slave station 3 or the repeater 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical RF (Radio Fr
The present invention relates to a repeater-connected system in equency (radio frequency) conversion transmission, and more particularly to a repeater-connected system that suppresses maintenance and inspection costs and realizes stable system operation.

[0002]

2. Description of the Related Art A conventional star connection type system for optical RF conversion transmission will be described with reference to FIG. FIG.
It is a configuration block diagram of a conventional star connection type system.
The conventional star connection type system has a structure as shown in FIG.
F base station (BTS) 1, RF master station (M / U) 2, multiple RF slave stations (S / U) 3, distribution of optical signals to S / U 3, and optical signals from S / U 3. And an optical star coupler 4 for synthesizing.

[0003] The BTS1 and the M / U2 are connected by two coaxial cables, and communication by electric signals is performed. M
/ U2 and each S / U3 are connected by two optical cables via the optical star coupler 4, and communication by optical signals is performed. Two coaxial cables connecting the BTS1 and the M / U2, and two optical cables connecting the M / U2 and each S / U3, respectively, are downlink transmissions for transmitting an optical signal from the BTS1 to each S / U3. It is used as a cable and an upstream transmission cable for transmitting an optical signal from each S / U3 to the M / U2.

[0004] In order to manage and control the operation state of each S / U3, in the above-mentioned system, communication for state monitoring is performed between the M / U2 and each S / U3 using an optical transmission path. This is called parent-child communication. The above system employs a polling method of performing communication for monitoring the status of a specific S / U3 from the M / U2, because the runway is half duplex for performing parent-child communication.

[0005] Next, M / U for performing conventional parent-child communication.
2 and S / U3 will be described with reference to FIG. FIG.
Are M / U2 and S / U for realizing the conventional parent-child communication.
FIG. 3 is a configuration block diagram of No. 3; As shown in FIG. 5, the M / U 2 for realizing the conventional parent-child communication is provided by a microcomputer 21.
And a plurality of E / O converters 22 and a plurality of O / E converters 2
3, a signal distributor 24, and an optical signal combiner 25. The S / U 3 includes a microcomputer 31, an O / E converter 32, and an E / O converter 33, as shown in FIG.

A plurality of E / O converters 22, a plurality of O / E converters 23, a signal distributor 24, and an optical signal combiner 25 in FIG. 5 correspond to the optical star coupler 4 in FIG. In FIG. 5, the optical star coupler 4 shown in FIG.
In the M / U2.

Each part in FIG. 5 will be specifically described. The microcomputer 21 is a microcomputer that controls parent-child communication, and transmits a control signal related to parent-child communication to the signal distributor 2.
4 and a signal from the optical signal combiner 25 is input to perform processing relating to parent-child communication.

The signal distributor 24 distributes the electric signal output from the microcomputer 21 to each S / U3. The E / O converter 22 converts the electric signal distributed by the signal distributor 24 into a downstream optical signal and transmits the downstream optical signal to each S / U 3. The O / E converter 23 converts the upstream optical signal transmitted from each S / U 3 into an electric signal and outputs the electric signal to the optical signal combiner 25. The optical signal combiner 25 combines the electric signals converted by the respective E / O converters 23 and outputs the combined signals to the microcomputer 21.

The O / E converter 32 of each S / U 3
The downstream optical signal transmitted from the M / U 2 is converted into an electric signal and output to the microcomputer 31. The microcomputer 31 has the M / U2
And controls the inside of the S / U 3 on the basis of the control signal from the E / O converter 3, and outputs the corresponding signal to the E / O converter 33. E /
The O-converter 33 converts the electric signal output from the microcomputer 31 into an upstream optical signal and transmits it to the M / U2.
Note that all other S / Us 3 connected to the M / U 2 have the same configuration as described above.

Next, the operation of the parent-child communication by the conventional polling method will be described with reference to FIG. M / U2
Sends a monitoring control instruction to each S / U 3 to the microcomputer 2
1 and transmitted to the signal distributor 24 as an electric signal. The signal of the supervisory control command is distributed to the E / O converters 22 corresponding to the respective S / Us 3 in the signal distributor 24, then converted into optical signals in the E / O converter 22, and passed through the optical cable to each S / U. / U3.

In the S / U 3, the signal of the monitoring control command is first converted into an electric signal by the O / E converter 32 and output to the microcomputer 31. The microcomputer 31 monitors the status of the S / U 3 based on the input monitoring control command, and outputs slave station status information as a monitoring result to the E / O converter 33 as an electric signal. Here, the slave station status information includes which S / U
3 includes information on the S / U 3 to which the slave station status information has been transmitted so that it can be determined whether or not the slave station status has been transmitted. The slave station state information is converted into an optical signal in the E / O converter 33 and transmitted to the M / U 2 through an optical cable.

In the M / U 2, the slave station status information is converted into an electric signal by the O / E converter 23, combined with the slave station status information transmitted from another S / U 2 by the signal combiner 25, and Is output to Microcomputer 21
Can check the operation status of each S / U 3 and the presence or absence of a failure based on the input slave station state information. The above is the operation of the parent-child communication by the conventional polling method.

[0013]

However, in the conventional star connection type system as shown in FIG.
When U2 and each S / U3 are separated, a considerable number of longer optical cables are required, so that there is a problem that a great deal of time, labor and cost are required for the optical cable facilities.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. By installing a repeater, the facility of an optical cable can be made easier, the maintenance and inspection costs can be reduced, and the repeater can be operated stably. It is intended to provide a connection type system.

[0015]

SUMMARY OF THE INVENTION The present invention for solving the above-mentioned problems of the prior art is directed to a repeater connection type system for transmitting an optical signal between a master station, a repeater, and a plurality of slave stations. The master station outputs a signal of monitoring information for monitoring the status of a specific slave station to the slave station, and determines the slave station and the relay station from the input slave station state information and the repeater state information signal. Master station control means for monitoring the status of the power supply, electric / optical signal conversion means for converting a signal of the monitoring information into an optical signal and transmitting the signal to the repeater;
Optical / electrical signal conversion means for receiving the status information of the slave station and the repeater transmitted from the repeater, converting the information into an electric signal, and outputting the electric signal to the master station control means, wherein the repeater receives the information from the master station. Optical signal distribution means for distributing monitoring information to any of a plurality of slave stations, a plurality of optical / electrical signal conversion means for receiving slave station state information transmitted from the slave station and converting the same into electric signals; An optical signal synthesizing means for synthesizing a signal input from the optical / electrical signal converting means, and a signal of repeater status information indicating a state of the repeater being synthesized with a signal of the slave station status information synthesized by the optical signal synthesizing means Repeater control means, and electrical / optical signal conversion means for converting a signal of the status information of the slave station and the repeater synthesized by the repeater control means into an optical signal. An optical / electrical signal converter that converts transmitted monitoring information into electrical signals. Means, a slave station control means for receiving a signal of monitoring information converted by the optical / electrical signal converting means, and outputting a signal of slave station state information indicating a state of the slave station, and a signal of slave station state information. It is a repeater-connected system characterized by comprising an electric / optical signal conversion means for converting into an optical signal. It facilitates facility installation, reduces maintenance and inspection costs, and performs stable operation. Can be.

[0016]

Embodiments of the present invention will be described with reference to the drawings. Note that the function realizing means described below may be any circuit or device as long as the function can be realized, and some or all of the functions may be realized by software. is there. Further, the function realizing means may be realized by a plurality of circuits, or the plurality of function realizing means may be realized by a single circuit.

In a repeater connection type system according to an embodiment of the present invention, a repeater is provided between a master station for transmitting an optical signal and a plurality of slave stations, and the master station monitors the status of a specific slave station. To the slave station, and the slave station transmits slave station status information indicating the status of the slave station to the repeater in response to the monitor information from the master station, and the repeater receives the monitor information from the slave station. The slave station state information and the repeater state information indicating the state of the repeater are combined and transmitted to the master station, and the master station monitors the states of the slave station and the repeater.

This facilitates the optical cable facility,
Further, maintenance and inspection costs can be reduced, and stable operation can be performed.

The master station control means in the claims corresponds to the microcomputer 21 in FIG.
The relay control means corresponds to the microcomputer 11, the optical signal distribution means corresponds to the optical signal distributor, and the signal combining means corresponds to the signal combiner. The optical signal conversion means supplies the E / O converter with an optical /
The electric signal conversion means corresponds to an O / E converter.

A repeater connection type system according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a configuration block diagram of a repeater connection type system according to an embodiment of the present invention. 4 and 5 will be described with the same reference numerals. As shown in FIG. 1, a repeater connection type system (this system) according to the present embodiment includes an RF base station (BTS) 1, a master station (M / U) 2,
It comprises a repeater (HUB) 10 and a plurality of slave stations (S / U) 3. The BTS1 and the M / U2 are connected by two coaxial cables in the same manner as in the conventional star connection type system, except that an H is connected between the M / U2 and each S / U3.
UB10 is provided, and M / U2 and each S / U3 are HUB1.
0 and two optical cables respectively.

Also in this system, a parent-child communication for monitoring the state between the M / U 2 and the S / U 3 using an optical transmission line for managing the operation state of each device or controlling the S / U 3 is also used. Is performed. Although the polling method is also used in the parent-child communication in the present system, a monitoring control command is transmitted from the M / U 2 to a specific S / U 3 and a specific S / U
3, when the monitoring result information is received from the HUB 10, the monitoring result information of the HUB 10 is also obtained.

Next, the configuration of the M / U2, S / U3 and HUB 10 for realizing parent-child communication in the present system will be described with reference to FIG. FIG. 2 is a configuration block diagram of the M / U2, S / U3, and HUB 10 that implement parent-child communication in the present system. The M / U 2 includes a microcomputer 21 that controls parent-child communication, an E / O converter 22 that converts an electric signal output from the microcomputer 21 into a downstream optical signal, and a HUB 10.
O / E that converts upstream optical signal transmitted from
A converter 23 is provided. In FIG. 2, O / E
The electric signal converted by the converter 23 is output to the microcomputer 21, and the electric signal output from the microcomputer 21 is transmitted to the E / O converter 22.

The equipment provided in the HUB 10 can be functionally classified into sections for controlling an upstream optical signal and a downstream optical signal. The upstream optical signal control part monitors the operation status of the HUB 10 and outputs the repeater status information to the microcomputer 11.
A plurality of O / E converters 13 for converting downstream optical signals transmitted from the respective S / Us 3 into electric signals, and a signal combiner 14 for synthesizing the electric signals converted in each E / O converter 13 And an E / O converter 15 for converting an electric signal output from the microcomputer 11 into an upstream optical signal. The electric signal synthesized by the optical signal synthesizer 14 is output to the microcomputer 11, and the electric signal output from the microcomputer 11 is E / E
It is transmitted to the O converter 15.

The downstream optical signal control section comprises an optical signal distributor 12 for distributing the downstream optical signal transmitted from the M / U 2 to each S / U 3. That is, in the HUB 10, the downstream optical signal is transmitted to each S / U 3 without being converted into an electric signal. The equipment provided in each S / U 3 is the same as that of the conventional star connection type system, and the description is omitted.

Next, the operation of the parent-child communication by the polling method of the present system will be described with reference to FIG. M /
U2 sets a monitoring control command to be performed on each S / U3 in the microcomputer 21 and converts the E / O converter 2 into an electric signal.
Output to 2. In the E / O converter 22, the signal of the supervisory control command is converted into an optical signal, and the optical signal is transmitted through the HUB1 through the optical cable.
Sent to 0. In the HUB 10, the signal of the supervisory control command is transmitted to the optical signal distributor 12 in the downstream optical signal control part,
It is distributed to each S / U3 through an optical cable. S / U3
Then, the signal of the monitoring control command is first converted into an electric signal by the O / E converter 32 and output to the microcomputer 31.

The microcomputer 31 monitors the status of the S / U 3 based on the input monitoring control command, and outputs slave station status information as the monitoring result to the E / O converter 33 as an electric signal. The slave station status information is converted into an optical signal in the E / O converter 33 and transmitted to the HUB 10 through an optical cable.

In the HUB 10, the slave station state information is transmitted to the upstream optical signal control part, first converted into an electric signal by the O / E converter 13, and the signal is synthesized together with the slave station state information transmitted from another S / U3. The signals are combined by the device 14 and output to the microcomputer 11. When the slave station status information is input, the microcomputer 11 monitors the operation status of the repeater (HUB) 10, adds the relay status information as the monitoring result to the slave station status information, and outputs the result to the E / O converter 15. I do. Here, the repeater status information includes information for identifying the HUB 10 so that the HUB 10 can be determined to have been transmitted from the repeater. HU
The slave station status information including the repeater status information of B10 is E /
The signal is converted into an optical signal by the O converter 15 and transmitted to the M / U 2 through the optical cable.

In the M / U 2, the slave station state information including the repeater state information is converted into an electric signal by the O / E converter 23 and output to the microcomputer 21. The microcomputer 21 determines each S / S based on the input slave station status information and repeater status information.
The operation status of U3 and the repeater 10 and the presence or absence of a failure are confirmed. The above is the operation of the parent-child communication of the present system.

According to this system, M / U2 and each S / U
3 and the monitoring result information of each S / U 3
Providing the HUB 10 for transmitting data to the optical fiber 2 has the effect of reducing the labor and cost of the optical cable facility. Especially M
The effect is remarkable when the distance between / U2 and each S / U3 is a long distance.

Further, when the status information of each S / U 3 is synthesized by the HUB 10, the status information of the HUB 10 is also added and synthesized, so that the HUB 1 can be simultaneously monitored with the status of the S / U 3.
Since the status monitoring of 0 can be performed, the number of times of transmission of the monitoring control command from the M / U 2 can be reduced. As a result, the transmission cost can be reduced, and the S / U 3 and the HUB 10 can be efficiently maintained and inspected. It is possible and stable operation can be performed, which is effective.

[0031]

Next, the configuration and operation of a specific embodiment of the present system will be described with reference to FIG. FIG. 3 is a configuration block diagram of a specific embodiment of the present system. FIG.
Alternatively, portions having the same configuration as in FIG. 2 are denoted by the same reference numerals, and description thereof is omitted. In the present embodiment, as shown in FIG. 3, BTS1, M / U2, S / U3, and HUB10
And an operation state monitoring / control device (monitor) 5.

In this embodiment, the radio frequency communication and each S / U
3 is performed using the circuit shown in the block diagram of FIG. In order to improve the quality of the radio frequency communication, a signal amplifier (AMP) for amplifying the electric signal and a constant level of the amplified signal are provided at the entrance of the electric signal of the M / U2, S / U3 or HUB10. A signal attenuator (ATT) is provided.

In the downstream optical signal control part of the HUB 10, the optical signal distributor 14 only distributes the optical signal to each S / U 3, and since no electric signal is transmitted, AMP and ATT are not provided. Further, the antennas 36 and 37 set in each S / U 3 are an antenna for transmitting a radio frequency to the wireless handset and an antenna for receiving the radio frequency from the wireless handset, respectively.

Next, the operation of the radio frequency communication of this embodiment will be described with reference to FIG. When transmitting a radio frequency signal from the BTS 1 to a specific wireless slave,
1 transmits a radio frequency signal to the M / U 2 as an electric signal through a coaxial cable. Here, the radio frequency signal includes information on a specific slave unit that is a transmission destination. M
At / U2, the radio frequency signal is first amplified by the AMP 26, adjusted to a constant level by the ATT 27, and then output to the E / O converter 22. Further, the radio frequency signal is converted into an optical signal in the E / O converter 22 and transmitted to the HUB 10 through an optical cable.

In the HUB 10, the radio frequency signal is distributed by the optical signal distributor 12 to each S / U 3 through an optical cable. In S / U3, the radio frequency signal is first O / E
After being converted into an electric signal by the converter 32, amplified by the AMP 34, and adjusted to a certain level by the ATT 35,
The signal is transmitted to a specific wireless slave through the antenna 36.

When a radio frequency signal is transmitted from the radio terminal, the radio frequency signal is
/ U3. Further, the radio frequency signal is amplified by the AMP 38 of the received S / U3,
After being adjusted to a certain level by the TT39, the signal is converted into an optical signal by the E / O converter 33,
/ U2.

In the HUB 10, the radio frequency signal is first
Is converted into an electric signal by the / E converter 13 and the AMP1
After being amplified at 6 and adjusted to a constant level at ATT 17, the signal is combined with a radio frequency signal transmitted from another S / U 3 by the signal combiner 14. The synthesized radio frequency signal is converted into an optical signal by the E / O converter 15 and transmitted to the M / U 2 through an optical cable.

In the M / U 2, the radio frequency signal is converted into an electric signal by the O / E converter 23, amplified by the AMP 28, adjusted to a certain level by the ATT 29, and transmitted to the BTS 1 through the coaxial cable. . The BTS 1 transmits the received radio frequency signal to a destination base station. The above is the operation of the radio frequency communication according to the present embodiment.

The operation of the parent-child communication in this embodiment is based on M / U
2, except that amplification and level adjustment of the electric signal by AMP and ATT are performed at the entrance of the electric signal to the S / U 3 or the HUB 10, so the detailed description is omitted. Omitted. Also, the monitoring device 5 connected to the M / U 2 by a serial I / F changes the condition of the monitoring control command and confirms the status information of each S / U 3 and HUB 10 transmitted to the M / U 2. It is possible to do.

The microcomputers 31 and 11 provided in each S / U 3 or HUB 10 operate in a stable state, so that the input and output levels of electric signals in each S / U 3 or the repeater 10 and the temperature. Is measured by a sensor (not shown) or the like, and these measured values are monitored. Based on the measured values, signal attenuation by ATT is controlled. When it is determined that the measured value in each S / U 3 or the repeater 10 exceeds a certain range and hinders the operation, the microcomputers 31 and 11 add warning information to the status information to be transmitted to the M / U 2 to call attention. Or each S / U3 or HUB10
Stop the operation of.

According to the present embodiment, since the devices for performing the radio frequency communication and the parent-child communication are common, in addition to the effects of the invention shown in FIGS. There is an effect that can be reduced.

[0042]

According to the present invention, a repeater is provided between a master station for transmitting an optical signal and a plurality of slave stations, and the relay station combines the status information of each slave station and the status of the relay station. Since it is a repeater communication system that transmits information to the master station with additional information and monitors the status information of each slave station and the repeater at the master station, there is an effect that optical cable facilities can be easily performed and costs can be reduced. Furthermore, since the status information of the slave station and the status information of the relay station are combined and transmitted, the number of times of optical signal transmission can be reduced, and the maintenance and inspection of the repeater communication system can be performed efficiently. In addition, there is an effect that stable operation can be performed.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a repeater connection type system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a master station and a slave station for realizing master-slave communication in the present system.

FIG. 3 is a configuration block diagram of a specific embodiment of the present system.

FIG. 4 is a configuration block diagram of a conventional star connection type system.

FIG. 5 is a configuration block diagram of a master station and slave stations for realizing conventional master-slave communication.

[Explanation of symbols]

1: RF base station (BTS), 2: RF master station (M /
U), 3 ... RF slave station (S / U), 4 ... optical star coupler, 5 ... operating state monitoring / control device, 10 ... repeater (HUB), 11, 21, 31 ... microcomputer, 12 ...
Optical signal distributor, 13, 23, 32: Optical / electrical signal converter, 14, 25: Signal combiner, 15, 22, 33 ...
Electrical / optical signal converter, 16, 26, 28, 34, 38
... signal amplifier, 17, 27, 29, 35, 39 ... signal attenuator, 24 ... signal distributor, 36 ... RF signal transmitting antenna, 37 ... RF signal receiving antenna

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04Q 7/30

Claims (2)

[Claims] A repeater is provided between a master station performing optical signal transmission and a plurality of slave stations, wherein the master station transmits monitoring information for monitoring the state of a specific slave station to the slave station. When the slave station receives the monitoring information from the master station,
A slave station that transmits slave station state information indicating the state of the slave station to the repeater, wherein the repeater receives slave station state information from the slave station and repeater state information indicating the state of the repeater. And a repeater for transmitting the combined signal to the master station. 2. A repeater connection type system for transmitting an optical signal between a master station, a repeater, and a plurality of slave stations, wherein the master station transmits monitoring information for monitoring a state of a specific slave station. Master station control means for outputting a signal to the slave station and monitoring the states of the slave station and the relay station from the input slave station state information and repeater state information signals; and An electrical / optical signal converting means for converting the signal into a signal and transmitting the signal to the repeater; receiving the state information of the slave station and the repeater transmitted from the repeater and converting the received information into an electrical signal to the master station controlling means; An optical / electrical signal conversion unit for outputting, the relay unit distributes the monitoring information received from the master station to any of a plurality of slave stations, and a slave transmitted from the slave station. A plurality of optical / electrical signal conversion means for receiving the station state information and converting the information into electric signals; Optical signal combining means for combining signals input from the plurality of optical / electrical signal converting means, and repeater state information indicating the state of the repeater in a signal of slave station state information combined by the optical signal combining means Repeater control means for synthesizing the signals of the above, and electrical / optical signal conversion means for converting a signal of the status information of the slave station and the repeater synthesized by the repeater control means into an optical signal. An optical / electrical signal converting means for converting the monitoring information transmitted from the optical signal distributing means into an electric signal;
A slave station control unit that inputs the monitoring information signal converted by the electric signal conversion unit and outputs a slave station state information signal indicating a state of the slave station; and converts the slave station state information signal into an optical signal. And an electric / optical signal converting means.