JP2002374216A - Optical RF conversion transmission system - Google Patents

Abstract

(57) [Summary] [Problem] To provide an optical cable facility easily by installing a repeater, further reduce maintenance and inspection costs, perform stable operation, suppress facility costs, and maintain an efficient and stable system. An optical RF conversion transmission system capable of realizing operation is provided. SOLUTION: A master station (M / U2 ') is a specific slave station (S / U2').
U3 ') or the repeater (H / U10') transmits a monitoring control command requesting status monitoring, and the S / U3 'transmits slave station status information when the monitoring control command is addressed to itself. Transmits to the repeater, if the target is the own, sends the received supervisory control command to the repeater, and when the repeater receives the supervisory control command addressed to itself from the slave station, This is an optical RF conversion transmission system that transmits the repeater status information to the master station, and transmits the status information to the master station when the slave station status information is received.

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 an optical RF conversion transmission system for equency (radio frequency) conversion transmission, and more particularly, to an optical RF conversion transmission system that suppresses facility costs and realizes efficient and stable system operation.

[0002]

2. Description of the Related Art A conventional optical RF conversion transmission system will be described with reference to FIG. FIG. 9 is a configuration block diagram of a conventional optical RF conversion transmission system. As shown in FIG. 9, a conventional optical RF conversion transmission system includes an RF base station (BTS in the figure) 1 and an RF transmission apparatus main unit (master station).
(M / U in the figure) 2 ″ and an RF transmission apparatus main unit (slave station) (S / U in the figure) 3 ″.

[0003] BTS1 and M / U2 "are connected by a coaxial cable, and communication by electric signals is performed.
2 "and S / U3" are connected by two optical cables, and communication by optical signals is performed. M / U2 "and S / U3"
And two optical cables for transmitting optical signals in the direction of M / U2 "to S / U3" and transmitting optical signals in the direction of S / U3 "to M / U2", respectively. It is used as an upstream optical line for performing

In the optical RF conversion transmission system, an optical transmission distance between M / U2 ″ and S / U3 ″ is:
It is determined by the magnitude of the RF output of the S / U 3 ″ in the upstream direction or the RF output of the M / U 2 ″ in the downstream direction, and the loss of the optical line. For example, as shown in FIG. 9A, when the distance between M / U2 ″ and S / U3 ″ is relatively short (for example, 10 km in the figure), the standard output M / U
U2 "a and S / U3" a may be used, but as shown in FIG. 9B, when the distance between M / U2 "and S / U3" is relatively long (for example, 15 km in the figure). Is a high output M
/ U2 "b and S / U3" b.

[0005] In the above-mentioned RF conversion transmission system, there is a star connection type optical RF conversion transmission system in which a plurality of S / Us 3 "are connected to one M / U 2". In the star connection type optical RF conversion transmission system, M / U2 ″
The electrical signal is distributed and converted into an optical signal within the S / U.
3 ", and the optical signals transmitted from a plurality of S / Us 3" are converted into electric signals, which are combined and handled.

In the star connection type optical RF conversion transmission system, an optical transmission path is used between the M / U 2 "and each S / U 3" in order to manage and control the operation state of each S / U 3 ". This system is called parent-child communication, and in the above-mentioned system, the transmission path is half duplex for performing parent-child communication.
The polling method of performing communication for monitoring the state of U3 "is adopted. That is, the M / U2" performs the state monitoring for monitoring.
/ U3 "transmits a status inquiry signal (monitoring control command) to the / U3" (polling), and the S / U3 "having received the monitoring control command converts the status of the S / U3" at that time into a status response message. / U2 ″, M / U
2 "monitors the status of S / U3".

[0007] Next, M / U for performing conventional parent-child communication.
The configuration of 2 "and S / U3" will be described with reference to FIG.
FIG. 10 shows M / U2 ″ for realizing the conventional parent-child communication.
FIG. 11 is a block diagram showing the configuration of an S / U 3 ″ and an M / U 2 ″ for realizing the conventional parent-child communication, as shown in FIG.
A microcomputer 21 ", a plurality of E / O converters 22, a plurality of O / E converters 23, a signal distributor 24, and a signal synthesizer 2
5 is provided. The S / U 3 ″ includes a microcomputer 31 ″, an O / E converter 32, and an E / U 3 ″ as shown in FIG.
An O converter 33 is provided.

Each part in FIG. 10 will be specifically described.
The microcomputer 21 ″ is a microcomputer that controls the parent-child communication, outputs a control signal (monitoring control command) related to the parent-child communication to the signal distributor 24, and outputs a signal (state response signal) from the optical signal combiner 25. Input and perform processing related to parent-child communication.

The signal distributor 24 distributes the electric signal output from the microcomputer 21 "to each S / U 3". The E / O converter 22 converts the electric signal distributed by the signal distributor 24 into a downstream optical signal and transmits it to each S / U 3 ″.
The / 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 converts each E / O converter 23. Are combined and output to the microcomputer 21 ″.

Also, the O / E converter 32 of each S / U 3 "
Converts the downstream optical signal transmitted from the M / U 2 ″ into an electric signal and outputs it to the microcomputer 31 ″. Microcomputer 31 ″
Controls the S / U 3 ″ based on a control signal (monitoring control command) related to parent-child communication from the M / U 2 ″, generates a corresponding signal (state response message), and generates an E / O converter 3.
Output to 3. The E / O converter 33 converts the electric signal output from the microcomputer 31 ″ into an upstream optical signal, and
2 ". All the 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 / U
2 "sets a monitoring control command to be performed on each S / U 3" in the microcomputer 21 "and transmits it as an electric signal to the signal distributor 24. The signal of the monitoring control command is transmitted to the signal distributor 2
After being distributed to the E / O converters 22 corresponding to the respective S / Us 3 ″ in 4, they are converted into optical signals by the E / O converters 22,
It is transmitted to each S / U 3 ″ through an optical cable.

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 state of S / U3 ″ based on the input monitoring control command,
The slave station status information, which is the monitoring result, is generated and output to the E / O converter 33 as an electrical signal of a status response message. Here, the S / U to which the slave station status information was transmitted is included in the slave station status information so that it is possible to determine which S / U 3 ″ was transmitted.
3 ″ identification information. The slave station status information is E /
The signal is converted into an optical signal in the O converter 33 and transmitted to the M / U 2 ″ through the optical cable.

In the M / U 2 ″, the slave station status information is converted into an electric signal by the O / E converter 23, and the other S / U 3 ″
Are synthesized by the signal combiner 25 together with the slave station status information transmitted from the MPU, and are output to the microcomputer 21 ". The microcomputer 21" calculates each S / U 3 "based on the input slave station status information.
It is possible to check the operation status of the system and whether there is a failure.
The above is the operation of the parent-child communication by the conventional polling method.

[0014] As a prior art relating to the optical RF conversion transmission system, Japanese Patent Application Laid-Open No.
No. 00-286802, "Analog Optical Transmission Repeater and Analog Optical Transmission System Using It" (Applicant: Kokusai Electric Inc., Inventor: Ikuo Taniguchi et al.). According to this conventional technique, an optical-to-electrical conversion unit connected to an optical fiber line from a slave station separates an RF signal and a voice band signal to be transmitted, converts them into an electric signal, and performs RF amplification and retransmission. Amplifying means respectively amplify, and the drive control section superimposes the amplified signal on a DC current for driving an electric / optical conversion means for transmitting an optical signal to a master station, and does not soft-control a transmission signal from a slave station. This is an analog optical transmission repeater for relaying to a master station, whereby a control signal from a slave station can be retransmitted without performing software control for relaying to a master station.

[0015]

However, in the above-mentioned conventional optical RF conversion transmission system, M / U2 ″ and S / U
If the distance between 3 ″ is relatively short, the standard output M / U
2 "a and S / U3" a, but when the distance is relatively long, a larger output (high output) M / U
Since 2 "b and S / U3" b are required, there is a problem that the cost for developing the device is increased, and the price of a high-power device is high. In addition, since it is necessary to prepare devices having different outputs according to the distance between the M / U2 "and the S / U3", there is a problem that flexibility in studying the configuration of the facility is lacking. there were. Further, in the optical RF conversion transmission system of the star connection type, when the M / U2 ″ and each S / U3 ″ are far apart, a considerable number of longer optical cables are required. , Labor and cost.

The present invention has been made in view of the above-mentioned circumstances. By installing a repeater, the facility of an optical cable is facilitated, the maintenance and inspection costs are reduced, the stable operation is performed, and the facility cost is reduced. It is an object of the present invention to provide a repeater connection type system capable of realizing efficient and stable system operation.

[0017]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides a repeater between a master station for transmitting an optical signal and a plurality of slave stations, wherein the master station is a slave station. Or an optical RF conversion transmission system that monitors the status of the repeater, wherein the master station transmits a monitoring control command requesting the status monitoring to a specific slave station or the relay device, and Is a master station that specifies and transmits a device to be routed until the monitoring control command is transferred to the device to be monitored, and when the slave station receives the monitoring control command from the master station, the device to be monitored becomes If it is self and the device to be passed is not itself, it sends slave station status information indicating the status of the slave station to the repeater, and the device to be monitored is not itself and the device to be passed is Is a slave station that sends the received monitoring control command to the repeater, Tsugiki receives the monitoring control command from the slave station, if device being monitored is self transmits the repeater state information indicating the state of the relay to the parent station,
When the slave station status information is received from the slave station, it is a repeater that transmits the received slave station status information to the master station.Only the monitored device monitors the status, and the status monitoring is performed efficiently. It can be carried out.

According to the present invention for solving the above-mentioned problems of the conventional example, in the optical RF conversion transmission system according to the first aspect, a configuration is added in which a slave station is directly connected to the master station, and the master station is specified. When transmitting a monitoring control command requesting status monitoring to a slave station, the slave station is a master station that specifies and sends a specific slave station as a device to be monitored and a device to be routed. When receiving the monitoring control command from the station, if the device to be monitored and the device to be routed are self, the slave station transmits slave station status information indicating the status of the slave station to the master station. Even if the system configuration is a direct connection type or a repeater connection type, parent-child communication can be realized with the same equipment and control, facility costs can be reduced, and efficient and stable system operation can be realized. .

[0019]

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 the repeater connection type system according to the embodiment of the present invention, a repeater is provided between a master station performing optical signal transmission and a plurality of slave stations, and the master station is connected to a specific slave station or the repeater. When transmitting a monitoring control command requesting monitoring of the status to the monitoring device, the device to be monitored and the device to be routed to which the monitoring control command is transferred to the device to be monitored are specified and transmitted. When receiving the monitoring control command from the master station, if the device to be monitored is its own, it sends slave station status information indicating the status of the slave station to the repeater, and the device to be monitored is not its own, and If the device to be passed is its own, it sends the received monitoring control command to the repeater, and if the relay receives the monitoring control command from the slave station, if the device to be monitored is itself, Transmits repeater status information indicating the status of the repeater to the master station, When receiving the status information, sending the slave station state information received in the master station, and in which the master station monitors the state of the repeater and slave stations. As a result, the optical cable facility can be simplified, the maintenance and inspection costs can be reduced, and efficient and stable operation can be performed.

Incidentally, the correspondence between each part in the embodiment of the present invention and each part in FIG. 4 is shown. The master station corresponds to M / U2 ', the repeater corresponds to H / U10', and the slave station corresponds to H / U10 '. , S / U
3 '.

First, a repeater connection type system according to an embodiment of the present invention which facilitates an optical cable facility and reduces maintenance and inspection costs 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. Parts having the same configurations as those in FIGS. 9 and 10 are described with the same reference numerals. Repeater connection type system according to the present embodiment (this system)
As shown in FIG. 1, from a RF base station (BTS) 1, a master station (M / U) 2, a repeater (H / B) 10, and a plurality of slave stations (S / U) 3 It is configured. BTS1 and M /
U2 is connected by two coaxial cables as in the conventional star connection type system, except that M / U2 and each S are connected.
The H / U 10 is provided between the H / U 10 and the / U 3, and the M / U 2 and each S / U 3 are connected to the H / U 10 by two optical cables.

Also in the present 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 is transmitted.
3, when the monitoring result information is received from the H / U 10, the monitoring result information of the H / U 10 is also obtained.

Next, the configuration of the M / U2, S / U3 and H / U10 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 H / U10 that implement parent-child communication in the present system. The M / U 2 includes a microcomputer 21 for controlling parent-child communication, an E / O converter 22 for converting an electric signal output from the microcomputer 21 into a downstream optical signal, and an H / U 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 H / U 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 H / U 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 H / U 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 /
In U2, a monitoring control command to be performed for each S / U3 is set in the microcomputer 21 and output as an electric signal,
The signal is converted into an optical signal by the E / O converter 22 and transmitted to the H / U 10 through an optical cable. In the H / U 10, the signal of the supervisory control command is transmitted to the optical signal distributor 1 in the downstream optical signal control section.
2 and distributed to each S / U 3 through an optical cable. In S / U3, the signal of the supervisory control command is first O / E
The signal is converted into an electric signal by the converter 32 and the microcomputer 3
1, the microcomputer 31 monitors the status of the S / U 3 based on the input monitoring control command, generates slave station status information as a result of the monitoring, and sends it to the E / O converter 33 as an electric signal. The signal is output, converted into an optical signal by the E / O converter 33, and transmitted to the H / U 10 through an optical cable.

In the H / U 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 together with the slave station state information transmitted from another S / U3. The signal is synthesized by the signal synthesizer 14 and output to the microcomputer 11. When the microcomputer 11 receives the slave station status information, the microcomputer 11 monitors the operation status of the repeater (H / U) 10, adds the repeater status information as the monitoring result to the slave station status information, and adds the E / O converter 15. Is output to Here, the repeater status information includes information for identifying the H / U 10 so that it can be determined that the H / U 10 has been transmitted from the repeater. H
The slave station status information including the repeater status information of / U10 is E
The signal is converted into an optical signal by the / O converter 15 and transmitted to the M / U 2 through an 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. It is converted and output to the microcomputer 21. The microcomputer 21 checks the operation status of each S / U 3 and the repeater 10 and the presence or absence of a failure based on the input slave station status information and repeater status information. 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 H / U 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.

When the status information of each S / U 3 is synthesized by the H / U 10, the status information of the H / U 10 is also added and synthesized, so that the H / U 1 is monitored simultaneously with the status monitoring 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 H / U 10 can be efficiently maintained and inspected. And stable operation can be performed.

In the repeater connection type system described above,
When a monitoring control command is transmitted from the M / U 2 to the S / U 3, the status information of the H / U 10 is always monitored for the status information corresponding to the command, and the status information in the H / U 10 is added to the M / U 2. Since the status is returned to U2, even if the status monitoring of the H / U 10 is unnecessary, the status monitoring process is always performed, which is inefficient. Further, in the star connection type optical RF conversion transmission system shown in FIG. 1, since a plurality of S / Us 3 are connected under the H / U 10, a monitoring control command is individually transmitted to each S / U 3. In such a case, the status of the H / U 10 is monitored each time, and the status information in the H / U 10 is added and returned to the M / U 2, which is very inefficient. When a monitoring control command is transmitted to all S / Us 3 without designating a specific S / U 3, the status monitoring of the H / U 10 may be performed only once. Individual status monitoring cannot be performed for S / U3.

Therefore, when necessary for the H / U 10, the parent / child communication of the state monitoring can be efficiently performed individually for each S / U 3, and the H / U 10 is not connected. An optical RF conversion transmission system that can be directly applied to a direct connection type configuration or a repeater connection type system relaying by the H / U 10 will be described. First,
The outline of the connection form of the optical RF conversion transmission system of the present invention will be described with reference to FIG. FIG. 3 shows the optical RF of the present invention.
It is a block diagram which shows the connection form of a conversion transmission system.
As shown in FIG. 3A, the optical RF conversion transmission system according to the present invention includes an RF base station (BTS in the figure) 1 and an RF transmission apparatus main unit (master station) (M / U in the figure) 2 '. , R
F transmission device main unit (slave station) (S / U in the figure)
3 'and a direct connection type system where the distance between the M / U 2' and the S / U 3 'is relatively short, and as shown in FIG. 3B, the M / U 2' and the S / U 3 ' Is relatively long, and there are two types of repeater connection type systems in which an H / U 10 'is provided between them. 3A and 3B, the same applies to the star connection type in which a plurality of S / Us 3 'are connected.

Also in this system, an optical transmission line is used to manage the operation state of each device or to control the S / U 3 ', and to monitor the state between the M / U 2' and the S / U 3 '. Parent-child communication is performed. Although the polling method is also used in the parent-child communication in this system, a monitoring control command is transmitted from the M / U 2 ′ to a specific S / U 3 ′ or H / U 10 ′, and a specific control which is a destination of the monitoring control command is transmitted. S / U
3 'or H / U 10' creates status information as a monitoring result and transmits it to M / U 2 'as a status response message. Further, it has a direct connection type configuration between M / U 2' and S / U 3 '. H / U1 between M / U2 'and S / U3'
It is characterized in that the parent-child communication can be realized by the same control even in the relay connection type provided with 0 '.

Next, the M / U 2 ', S / U 3' and H / U 10 'for efficiently realizing parent-child communication in the present system.
Will be described with reference to FIG. FIG. 4 shows an M / U 2 ′ and an S / U for efficiently realizing parent-child communication in the present system.
It is a block diagram of 3 'and H / U10'. The M / U 2 'in FIG. 4 includes a microcomputer 21' for controlling parent-child communication.
And an E / O converter 22 for converting an electric signal output from the microcomputer 21 'into a downstream optical signal, and an O / E converter 2 for converting an upstream optical signal transmitted from the H / U 10 into an electric signal.
3 and the subordinate system configuration (unit configuration) is a direct connection type (FIG. 3A) or a repeater connection type (FIG. 3A).
(B)) a unit selection switch 29 for switching between the two.

In FIG. 4, the electric signal converted by the O / E converter 23 is output to the microcomputer 21 ', and the electric signal output from the microcomputer 21' is output to the E / O converter 22.
2 is different from the microcomputer 21 in FIG. 2 in the transmission control method of transmitting the monitoring control command by the polling method of the microcomputer 21 'in FIG. The microcomputer 2
Since the control of the parent-child communication in 1 'is realized by a program executed in the CPU, the execution program is different from that of the microcomputer 21 in FIG. Details will be described later.

In FIG. 4, a unit selection switch 29 is provided in the M / U 2 'in a different configuration from the microcomputer 21' to switch between the direct connection type and the repeater connection type. The storage unit (not shown) used in the control processing of the parent-child communication performed in 21 'may store data indicating whether it is a direct connection type or a repeater connection type.

The equipment provided in the H / U 10 'can be functionally classified into portions for controlling an upstream optical signal and a downstream optical signal, and the downstream optical signal control portion is the same as that of the H / U 10 in FIG. The downstream optical signal transmitted from the M / U2 is transmitted to each S / U
H / U1.
At 0 ', the downstream optical signal is transmitted to each S / U 3' without being converted into an electric signal.

On the other hand, the upstream optical signal control section has the same components as the H / U 10 in FIG.
And a plurality of O / E converters 13 for converting downstream optical signals transmitted from each S / U 3 ′ into electric signals, and a signal synthesizer for synthesizing the electric signals converted in each E / O converter 13 14 and an E / O converter 15 for converting an electric signal output from the microcomputer 11 'into an upstream optical signal, which is the same as the H / U 10 in FIG. 2, except that the microcomputer 11' controls parent-child communication. The method is different from the microcomputer 11 of FIG. The control of the parent-child communication in the microcomputer 11 'is realized by a program executed in the CPU, so that the execution program is different from that of the microcomputer 11 in FIG. Details will be described later.

Each S / U 3 has the same components as the S / U 3 of FIG. 2, and includes a microcomputer 31 ', an O / E converter 32 for converting a downstream optical signal into an electric signal, and an output from the microcomputer 31. And an E / O converter 33 for converting the converted electrical signal into an upstream optical signal. The E / O converter 33 is the same as the S / U 3 in FIG. 2 except that the microcomputer 31 'controls the parent-child communication in FIG.
Is different from the microcomputer 31 of FIG. The microcomputer 31 '
Is controlled by a program executed in the CPU, the execution program is different from that of the microcomputer 31 in FIG. Details will be described later.

In short, the repeater connection type system of the present invention shown in FIG. 4 has M / U 2 ', H / U 10', and S / U
The control method for parent-child communication at 3 'is different from the control method for parent-child communication in the repeater connection type system of FIG. In the repeater connection type system of the present invention shown in FIG. 4, the M / U 2 'receives the monitoring control command as the monitoring control command, the request target device which is the destination of the monitoring control command, and the identifier of the transit target device which is the transit device of the monitoring control command. Generate and transmit a monitoring control instruction including At this time, the M / U 2 'grasps the configuration of the subordinate units, and sets the request target device and the route target device according to the grasped configuration.

First, the microcomputer 21 'in the M / U 2'
The transmission control method of the parent-child communication monitoring control command will be described with reference to FIG. FIG. 5 is a flowchart showing the flow of the transmission control process of the monitoring control command of the parent-child communication of the microcomputer 21 'in the M / U 2' of the present invention. The flow of the transmission control process of the parent / child communication monitoring control command of the microcomputer 21 'in the M / U 2' of the present invention is as follows.
Based on the state of W29, the configuration of the subordinate units is grasped,
(100), it is determined whether the H / U 10 'is a repeater connection type or a H / U 10' (102). If the H / U 10 'is present (Yes), the monitoring control command transmission (polling) is performed. It is determined whether the target (destination) is S / U3 '(10
4) If the destination is the S / U 3 '(Yes), the identifier of the S / U 3' is specified as the device to be requested for polling (106), and the polling signal of the monitoring control command is transmitted (108). End the polling process.

On the other hand, in process 104, if the polling target (destination) is not S / U 3 ', that is, the destination is H
/ U10 '(No), the identifier of the H / U10' is designated as the polling request target device (11).
0), a specific S / U as a device to be passed via polling
The identifier of 3 'is designated (112), the polling signal of the monitoring control command is transmitted (108), and the polling process is completed.

Further, in process 102, H / U 10 '
Is not a repeater connection type, that is, a direct connection type (N
In o), the identifier of the S / U 3 'is specified as the polling request target device (120), and the same S / U 3' identifier is specified as the polling target device (12).
2) Transmit the polling signal of the monitoring control command (10
8), end the polling process.

In the above description, in the process 100,
Although the configuration of the subordinate units has been shown to be grasped in the state of the unit selection SW 29, when data indicating the unit configuration is stored in the storage unit in the microcomputer 21 ', the data of the storage unit is read to control the subordinate units. Understand the unit configuration.

Next, the microcomputer 31 'in the S / U 3'
The method of controlling the parent-child communication will be described with reference to FIG. FIG. 6 shows the microcomputer 3 in the S / U 3 'of the present invention.
It is a flowchart figure which shows the flow of control processing of 1 'parent-child communication. Microcomputer 31 'in S / U 3' of the present invention
The flow of the parent-child communication control process is as follows. First, a polling signal of a monitoring control command is received (200), it is determined whether or not the request target device of the monitoring control command is itself (202). If you are yourself (Yes), S /
The status of U3 'is monitored, and slave station status information as the monitoring result is created as a status response message (204).

Then, it is determined whether or not the target device of the monitoring control command is the own device (205). If the target device of the monitoring control command is not the user (No), the status response message is The destination is H / U 10 '(20
6) In a case where the target of the monitoring control command is the user (Ye)
In s), the transmission destination of the status response message is M
/ U2 '(207), the processing 206 or the processing 207
After that, a status response message is transmitted (208), and the parent-child communication control process ends.

On the other hand, in the process 202, if the target of the monitoring control command is not the user (No), it is determined whether the target of the monitoring control command is the user (step 210). In Yes, the received monitoring control command is passed through as it is and transmitted (212), and the parent-child communication control process ends. Further, in the process 210, if the target device of the monitoring control command is not the own device (No), the polling signal of the monitoring control command received as it is is discarded, and the parent-child communication process is terminated.

Next, the microcomputer 1 in the H / U 10 '
The control method of parent-child communication 1 'will be described with reference to FIG. FIG. 7 is a flowchart showing a flow of a control process of parent-child communication of the microcomputer 11 'in the H / U 10' of the present invention. Microcomputer 1 in H / U 10 'of the present invention
First, the flow of the control processing of the parent-child communication of 1 'is as follows: S / U 3'
Is received (300), and it is determined whether the received signal is a status response message (302). If the received signal is not a status response message (No), it is determined whether the received signal is a polling signal of a monitoring control command (304). , If it is a polling signal (Ye
In s), it is determined whether or not the request target of the polling signal is itself (306).
The status of U10 'is monitored, the relay status information as the monitoring result is created as a status response message (308), the status response message is transmitted to M / U2' (310), and the control processing of parent-child communication ends. I do.

On the other hand, in the process 302, if the received signal is a status response message (Yes), the received status response message is directly transmitted to the M / U 2 '(32).
0), the control process of the parent-child communication ends. Processing 30
If the polling signal is not a polling signal in No. 4 (No), and if the polling signal is not requested by itself in the process 306 (No), the received signal is discarded and the parent-child communication process is terminated.

Next, the operation of the optical RF conversion transmission system shown in FIG. 4 will be described with reference to FIG. FIG. 8 is an explanatory diagram showing an operation example of the optical RF conversion transmission system of the present invention. In the optical RF conversion transmission system of the present invention, M / U
As shown in FIG. 3B, the unit configuration under 2 'is as follows.
When the H / U 10 'is of a repeater connection type, the H / U 10'
When monitoring 10 ', as shown in FIG.
/ U2 'transmits a monitoring control command in which H / U 10' is set as a request target device and a specific S / U 3 'is set as a pass target device.

Then, the S / U receiving the monitoring control command
At 3 ', the own device (S / U3') is set as the device to be routed, and the request target is H / U10 ', so that the monitoring control command is passed through as it is to H / U10'.
The H / U 10 'monitors the status of the H / U 10', and repeater status information as the monitoring result is created and transmitted as a status response message, based on the repeater status information received by the M / U 2 '. , H / U 10 'is checked for an operating condition and whether there is a failure.

On the other hand, as shown in FIG. 3B, when the unit configuration under the M / U 2 'is a repeater connection type with the H / U 10' and the S / U 3 'is monitored, FIG. As shown in b), the M / U 2 ′ requests the S / U
3 'is set, and the monitoring control command is transmitted without setting any target device. Then, the S / U 3 'that has received the monitoring control command determines that the self (S / U
Since 3 ') is set, the status of the S / U 3' is monitored, slave station status information as the monitoring result is created as a status response message, and no target device is set. A status response message is sent to H / U 10 ',
At U10 ', the status response message is passed through as it is and
/ U2 ', and confirms the operation status of the S / U3' and whether there is a failure based on the slave station status information received by the M / U2 '.

On the other hand, when the unit configuration under the M / U 2 'is a direct connection type without the H / U 10' as shown in FIG. 3A and the S / U 3 'is monitored, FIG. As shown in (1), a monitoring control command in which S / U 3 'is set as a request target device and a transit target device is transmitted from M / U 2'. In the S / U 3 ′ receiving the monitoring control command, the self (S / U 3 ′) is set as the requested device, so that the status of the S / U 3 ′ is monitored, and the slave station status which is the monitoring result is obtained. Information is created as a status response message,
Since the own device (S / U3 ') is set as the device to be passed, a status response message is transmitted to M / U2' and the M / U
The operation status of the S / U 3 'and the presence or absence of a failure are confirmed based on the slave station status information received in 2'.

In each of the cases shown in FIGS. 8A, 8B, and 8C, even in the case of a star connection type in which a plurality of S / Us 3 'are connected, the device to be requested by the monitoring control command is When a monitoring control command that is not the same is received, the message is discarded.

According to the optical RF conversion transmission system of the present invention, in the polling type parent-child communication in the case of the repeater connection type, the M / U 2 ′ specifies the request target device and the relay target device in the monitoring control command. The device designated as the transmission target device transmits the monitoring control command through, and only the device designated as the request target device monitors the status, and returns the monitoring result to the M / U 2 ′. There is an effect that the state monitoring can be performed efficiently by reducing the addition to the device which is not the target.

Specifically, in the optical RF conversion transmission system of the present invention, when the monitoring target is S / U 3 ', M / U 2'
Designates the S / U 3 'as a request target device in the monitoring control command and transmits the same, and the S / U 3' receiving the monitoring control command monitors the status and transmits the slave station status information as the monitoring result, and the H / U
10 'transmits through the slave station status information to the M / U 2', so that H /
/ U10 'can be reduced and the state can be monitored efficiently.

When the monitoring target is the H / U 10 ', the M / U 2' receives the H / U 10 '
/ U10 ', and S / U3', which transfers the monitoring control command, is also specified and transmitted as the target device, and the S / U3 'specified as the target device passes the monitoring control command to the H / U10. H / U 10 ', which has transmitted a through control to the H / U 10', receives the monitoring control command, monitors the status, and transmits the relay status information of the monitoring result to the M / U 2 '. There is an effect that the load on the S / U 3 'can be reduced and the state can be monitored efficiently.
In particular, in a star connection type configuration, a plurality of S / Us 3 '
Exists, and a specific S / U 3 ′ is specified as a device to be routed, so that the load on devices not to be routed can be greatly reduced,
There is an effect that the state can be monitored efficiently.

From another point of view, the optical RF of the present invention
In the conversion transmission system, when the H / U 10 ′ receives the monitoring control command, the H / U 10 ′ transmits a monitoring result if it is specified as the request target device, and if it is not specified as the request target device, When the monitoring control command is discarded and the monitoring result is received, the monitoring result is transmitted to the M / U 2 ′ through the monitoring result.
It is sufficient to monitor the status only when the monitoring of U10 'is requested, and there is an effect that the status monitoring can be performed much more efficiently than when monitoring is performed each time in accordance with the status monitoring of S / U 3'.

Further, in the star connection type configuration, there are a plurality of S / Us 3 ',
3 'performs status monitoring and transmits a monitoring result when the device itself is specified as the request target device, and monitors that the device itself is not specified as the request target device but is specified as the transit target device. H / U10 'through control command
If the user is not specified as the request target device or the pass target device, the monitoring control command is discarded, so that the processing for signals not related to the user is reduced, and the status is monitored efficiently. There is an effect that can be.

Further, according to the optical RF conversion transmission system of the present invention, even when the system configuration is diversified such as a direct connection type or a repeater connection type, the M / U 2 'generates M Simple control by simply changing the request target device and the transit target device incorporated in the monitoring control command according to the unit configuration under / U2 'and the type of the device to be monitored, flexibly to diversify the system configuration There is an effect that the state can be monitored efficiently in response. That is, the microcomputer 2 of the M / U 2 ′ has the direct connection type configuration shown in FIG. 3A or the repeater connection type configuration shown in FIG.
1), the processing realized by the microcomputer 31 'of the S / U 3', and the processing realized by the microcomputer 11 'of the H / U 10' can be the same, so that there is no need to develop a system according to the configuration. In addition, since maintenance according to the configuration becomes unnecessary, there is an effect that facility costs can be reduced and stable system operation can be performed.

[0061]

According to the present invention, a repeater is provided between a master station performing optical signal transmission and a plurality of slave stations, and the master station requests a specific slave station or the repeater to monitor the status. When transmitting a supervisory control command to be transmitted, a supervisory device and a device to be routed until the supervisory control command is transferred to the supervisory target device are specified and transmitted. When receiving the control command, if the device to be monitored is itself and the device to be routed is not self, the slave device transmits slave station status information indicating the status of the slave station to the repeater, and the device to be monitored is If the device to be passed is not the device itself and the device to be passed is the device itself, the received monitoring control command is transmitted to the repeater, and when the device receives the monitoring control command from the slave station, the device to be monitored becomes In some cases, repeater status information indicating the status of the repeater is transmitted to the master station. When receiving the slave station status information from the slave station, it is an optical RF conversion transmission system that transmits the received slave station status information to the master station. Has the effect that the state can be monitored and the state can be monitored efficiently.

According to the present invention, a configuration in which a slave station is directly connected to the master station is added, and the master station transmits a monitoring control command requesting a specific slave station to monitor the status. When a specific slave station is designated and transmitted as the device to be monitored and the device to be passed, and the slave station receives the monitoring control command from the master station, if the device to be monitored and the device to be routed are itself, Since the optical RF conversion transmission system transmits the slave station status information indicating the status of the slave station to the master station, the same equipment and control can be used regardless of whether the system configuration is a direct connection type or a repeater connection type. There is an effect that parent-child communication can be realized, facility costs can be reduced, communication system maintenance and inspection can be performed efficiently, and stable system operation can be realized.

[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 shows an M / M that realizes parent-child communication in the present system.
It is a block diagram of a structure of U, S / U, and H / U.

FIG. 3 is a block diagram showing a connection form of the optical RF conversion transmission system of the present invention.

FIG. 4 is a configuration block diagram of M / U, S / U, and H / U for realizing efficient parent-child communication in the present system.

FIG. 5 is a flowchart illustrating a flow of a transmission control process of a monitoring control command for parent-child communication of the microcomputer in the M / U of the present invention.

FIG. 6 is a flowchart illustrating a flow of control processing of parent-child communication of the microcomputer in the S / U of the present invention.

FIG. 7 is a flowchart showing a flow of control processing of parent-child communication of the microcomputer in the H / U of the present invention.

FIG. 8 is an explanatory diagram showing an operation example of the optical RF conversion transmission system of the present invention.

FIG. 9 is a configuration block diagram of a conventional optical RF conversion transmission system.

FIG. 10 shows M / U and S for realizing conventional parent-child communication.
FIG. 3 is a configuration block diagram of / U.

[Explanation of symbols]

1: RF base station (BTS), 2, 2 ', 2 "... RF master station (M / U), 3, 3', 3" ... RF slave station (S /
U), 10 ... repeater (H / U), 11, 21, 31
... Microcomputer, 12 ... Optical signal distributor, 13,23,3
2 ... optical / electrical signal converter 14, 25 ... signal combiner,
15, 22, 33 ... electric / optical signal converter, 24 ... signal distributor, 25 ... signal combiner, 29 ... unit selection S
W

Claims (2)

[Claims] 1. An optical RF conversion transmission system in which a repeater is provided between a master station performing optical signal transmission and a plurality of slave stations, wherein the master station monitors a state of the slave station or the repeater. When the master station transmits a monitoring control command requesting status monitoring to a specific slave station or the repeater, the monitoring target device and the monitoring control command are transferred to the monitoring target device. The slave station specifies and transmits a device to be routed until the slave station receives the monitoring control command from the master station, and the device to be monitored is itself, and the device to be routed. Is not its own, transmits slave station status information indicating the status of the slave station to the repeater, and if the device to be monitored is not its own and the device to be passed is its own, A slave station transmitting the monitored control command to the repeater. The relay, when receiving the monitoring control command from the slave station, if the device to be monitored is itself, transmits to the master station repeater status information indicating the status of the repeater, the slave station Receiving the slave station status information from the base station, and transmitting the received slave station status information to the master station. 2. A configuration in which a slave station is directly connected to a master station, wherein the master station transmits a monitoring control command requesting a specific slave station to monitor a state, and A master station that designates and transmits the specific slave station as a device and a device to be passed on; the slave station, when receiving the monitoring control command from the master station, causes the device to be monitored and the device to be routed to 2. The optical RF conversion transmission system according to claim 1, wherein, when the condition is satisfied, the slave station transmits slave station status information indicating the status of the slave station to the master station.