JPH11340939A - Control signal transmitting method and sdh multiplexer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control another base station without a modem and telephone line by transmitting a control signal, which is inserted into synchronous digital hierarchy(SDH) path overhead, through each SDH multiplexer. SOLUTION: An information request command from control terminal equipment 111 is sent to a bit rate converter circuit 114 of an SDH multiplexer 112 and adjusts the write or read speed of data to 16 kbps, for example, while asynchronously changing it. A path overhead extracting/inserting circuit 115 inserts the data of 64 kbps into an F2 byte in the path overhead of SDH and transmits it to an SDH multiplexer 122. In the path overhead extracrting/ inserting circuit 125, the F2 byte of the SDH path overhead is extracted. A bit rate converter circuit 124 converts the speed of data of 16 kbps to the velocity of an external serial interface. Data outputted from a serial interface circuit 123 are dispatched to equipment 121 to be controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an SDH (Sync).
Hronous Digital Hierarch
y) It relates to a multiplexing device.

[0002]

2. Description of the Related Art Conventionally, when one of two base stations accommodating an SDH multiplexing apparatus constituting a network controls another apparatus, for example, a subscriber line carrier, it is controlled by a system as shown in FIG. Was.

Referring to FIG. 4, two SDH multiplexers 411 and 421 constituting a network 401 are accommodated in different base stations 410 and 420, respectively.
Conventionally, when the controlled terminal 422 of the other base station 420 is controlled by the control terminal device 412 of one base station 410, the base stations 410 and 420 each have a modem 413 and control via the telephone network 402. The terminal device 412 and the controlled device 422 were connected, and control signals were transmitted and received.

[0004]

According to the prior art,
When one base station accommodating the SDH multiplexing apparatus controls a device of another base station, a control signal is transmitted and received via a telephone network using a modem. That is, it was necessary to prepare a modem and a telephone line.

[0005] The problem to be solved by the present invention is SDH.
A control signal transmission method and a control signal transmission method capable of performing control without using a modem and a telephone line when controlling a device of one base station accommodating a multiplexing device from another base station.
A DH multiplexing device is provided.

[0006]

In order to solve the above problems, the present invention provides the following control signal transmission method and SDH multiplexer.

That is, the present invention provides a method for transmitting a signal between a control terminal apparatus and a first base station having a first SDH multiplexing apparatus and a controlled apparatus and a second base station having a second SDH multiplexing apparatus. In a control signal transmission method in which a control terminal device transmits a control signal for controlling a controlled device, the control signal inserted into the SDH path overhead is transmitted via the first and second SDH multiplexers. A control signal transmission method is provided.

[0008] The present invention also provides a control signal transmission method according to the above control signal, wherein a plurality of control signals are multiplexed and inserted into an SDH overhead.

Further, the present invention provides a control signal transmission method according to the above control signal, wherein an SDH path overhead for inserting a control signal is selectable.

Further, the present invention relates to an SDH multiplexing apparatus, in which at least one of a control terminal apparatus and a controlled apparatus is connected to transmit and receive a control signal to and from the external apparatus. A serial interface circuit which is an interface for connecting and outputting a control signal by connecting a multiplexer, a bit rate converter circuit for converting a data transfer rate of the control signal, and a control signal inserted into the SDH path overhead; And a path overhead extracting / inserting circuit for extracting a control signal from the SDH multiplexer.

Further, the present invention provides the above SDH multiplexer comprising a plurality of serial interface circuits, a plurality of bit rate converter circuits, and a demultiplexing circuit for multiplexing and demultiplexing a plurality of control signals. The circuit is characterized in that the signal received from the bit rate converter circuit is multiplexed and output to the path overhead extraction / insertion circuit, and the signal received from the path overhead extraction / insertion circuit is separated and output to a plurality of bit rate converter circuits. And an SDH multiplexing device.

Further, the present invention provides the SDH multiplexing apparatus described above, further comprising an overhead selection circuit which is a circuit for selecting an SDH path overhead for inserting a control signal by a path overhead extraction and insertion circuit.
A DH multiplexing device is provided.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (1) First Embodiment A first embodiment of the present invention will be described with reference to FIG.

The control terminal device 111 of the base station 110 controls the controlled device 125 of the base station 120. The control terminal device 111 and the controlled device 121 are connected to SDH multiplexers 112 and 122, respectively. The SDH multiplexer 112 includes a serial interface circuit 113,
A bit rate converter circuit 114 and a path overhead extraction / insertion circuit 115 are provided. Similarly, the SDH multiplexer 122 includes a serial interface circuit 123, a bit rate converter circuit 124, and a path overhead extraction and insertion circuit 125.

The serial interface circuit 113 is an interface for connecting the control terminal device 111 and the SDH multiplexer 112. Bit rate converter circuit 11
4 makes the data transfer rate constant. The path overhead extraction / insertion circuit 115 inserts data into or extracts data from the SDH path overhead F2.

Note that the SDH path overhead is ITU-T
This is a 9-byte signal defined in the virtual container in the multiplexing method specified in. The usage of these 9 bytes is defined for each byte, and the F2 byte is one of the byte signals, and the usage is released to the user.

Similarly, the serial interface circuit 12
Reference numeral 3 denotes an interface for connecting the control terminal device 121 and the SDH multiplexer 122. The bit rate converter circuit keeps the data transfer rate constant. The path overhead extraction / insertion circuit 125 inserts data into or extracts data from the SDH path overhead F2.

Next, the control terminal device 11 of the base station 110
The operation of the first embodiment will be described by taking as an example the case where the status information of the controlled device 121 of the base station 120 is collected from No. 1.

The information request command transmitted from the control terminal device 111 is transferred to the bit rate converter circuit 114 via the serial interface circuit 113 of the SDH multiplexer 112.

In the bit rate converter circuit 114, the data write speed and the data read speed are asynchronously changed, and the speed is adjusted to a constant speed inside the device, for example, 16 kbps.

The path overhead extraction / insertion circuit 115 inserts the data of 64 kbps into the F2 byte in the path overhead of the SDH and transmits it to the SDH multiplexer 122.

The path overhead extraction / insertion circuit 125 of the SDH multiplexer 122 extracts the F2 byte of the SDH path overhead received from the SDH multiplexer 115 and passes it to the bit rate converter 124.

The bit rate converter circuit 124
The data rate of 6 kbps is converted to the speed of the external serial interface and passed to the serial interface circuit 123.

Data output from the serial interface circuit 123 is passed to the controlled device 121 connected to the serial interface circuit 123.

Thus, the control terminal device 1 of the base station 110
Data transmitted from 11 is transmitted to the controlled device 121 of the base station 120. On the other hand, the response information of the controlled device 121 is transmitted to the control terminal device 111 along the reverse path of the information request command.

(2) Second Embodiment A second embodiment of the present invention will be described with reference to FIG.

In FIG. 2, a base station 210 includes a plurality of control terminal devices 211a to 211d, which are connected to an SDH multiplexer 212. On the other hand, the base station 220 includes a plurality of controlled devices 221a to 221d, which are also connected to the SDH multiplexer 222.

The SDH multiplexers 212 and 222 constitute a network, and transmit the F2 byte, which is a user channel of the SDH path overhead, to the controlled device 221a.
Ｄd are used as control channels.

For this purpose, the SDH multiplexer 212 includes serial interface circuits 213a to 213d, bit rate converter circuits 214a to 214d, a demultiplexing circuit 215, and a path overhead extraction and insertion circuit 216. The serial interface circuits 213a to 213d are connected to the control terminal device 211.
An interface for connecting the SDH multiplexer 212 to the SDH multiplexer 212. Bit rate converter circuits 214a-d
Keeps the data transfer rate constant. The demultiplexing circuit 215 multiplexes and demultiplexes data of a plurality of serial interfaces. The path overhead extraction / insertion circuit 216 inserts or extracts the multiplexed data into or from the path overhead F2 of the SDH.

Similarly, the SDH multiplexer 222 includes serial interface circuits 223a to 223d, bit rate converter circuits 224a to 224d, demultiplexing circuit 225, and path overhead extraction and insertion circuit 226. The serial interface circuits 223a to 223d are controlled devices 221a to
d and an interface for connecting the SDH multiplexing device 222 with the d. The bit rate converter circuits 224a to 224d make the data transfer speed constant. The demultiplexing circuit 225 multiplexes and demultiplexes data of a plurality of serial interfaces. The path overhead extraction and insertion circuit 226 inserts or extracts the multiplexed data into or from the F2 of the SDH path overhead.

Next, the control terminal device 21 of the base station 210
The operation of the second embodiment will be described by taking as an example the case where the status information of the controlled device 221a of the base station 220 is collected from 1a.

The information request command transmitted from the control terminal device 211a is transferred to the bit rate converter circuit 214a via the serial interface circuit 213a of the SDH multiplexer 212.

The bit rate converter circuit 214a changes the data write speed and the data read speed asynchronously,
The speed is adjusted to a constant speed inside the device, for example, 16 kbps.

The data whose speed has been adjusted in this way is passed to the demultiplexing circuit 215 together with the data of the other bit rate converter circuits 214b, 214c and 214d. The multiplexing / demultiplexing circuit 215 multiplexes these data and transfers the multiplexed data to the path overhead extraction / insertion circuit 216 as 64 kbps data.

The path overhead extraction / insertion circuit 216 inserts 64 kbps data into the F2 byte in the SDH path overhead and transmits the data to the SDH multiplexer 222.

The path overhead extraction and insertion circuit 226 of the SDH multiplexer 222 extracts the F2 byte of the SDH path overhead received from the SDH multiplexer 216 and passes it to the demultiplexer 225.

The demultiplexing circuit 225 includes respective bit converter circuits 224a, 224b, 224c and 224.
Separate the data into d and sort.

The bit rate converter circuit 224a
The allocated 16 kbps data is converted into a data speed of the external serial interface and passed to the serial interface circuit 223a.

The data output from the serial interface circuit 223a is
is passed to the controlled device 221a connected to a.

Thus, the control terminal device 2 of the base station 210
The data transmitted from 11a is transmitted to the controlled device 221a of the base station 220. On the other hand, the response information of the controlled device 221a is transmitted to the control terminal device 211a along the reverse path of the information request command.

(3) Third Embodiment FIG. 3 shows a third embodiment of the present invention. When comparing the configuration with the second embodiment, the difference in the configuration of the third embodiment is that the output data of the demultiplexing circuit is provided between the demultiplexing circuit and the overhead extraction and insertion circuit of the SDH multiplexer. The point is that an overhead selection circuit for selecting the overhead of the SDH to be inserted is provided.

The SDH multiplexer 312 of the base station 310
Are serial interface circuits 313a-d for connecting the control terminal devices 311a-d, bit rate converter circuits 314a-d for making the data transfer rate constant, and a demultiplexing circuit 315 for multiplexing and demultiplexing data of a plurality of serial interfaces. And an overhead selection circuit 317 for selecting an SDH overhead for inserting the output data of the demultiplexing circuit 315, and an overhead extraction and insertion circuit 316 for inserting data into the selected overhead.

The SDH multiplexer 322 of the base station 320
Are serial interface circuits 323a-d connecting the controlled devices 321a-d, bit rate converter circuits 324a-d for making the data transfer rate constant, and a demultiplexing circuit 325 for multiplexing and demultiplexing data of a plurality of serial interfaces. And an overhead selection circuit 327 for selecting an SDH overhead for inserting the output data of the demultiplexing circuit 325, and an overhead extraction and insertion circuit 326 for inserting data into the selected overhead.

Next, the operation of the third embodiment will be described. As described in the operation of the second embodiment, the base station 3
A case where the status information of the controlled device 321a of the base station 320 is collected from ten control terminal devices 311a will be described as an example.

The demultiplexing circuit 3 from the control terminal 311a
The processing of the data up to 15 is the same as in the second embodiment, and a description thereof will be omitted.

Bit rate converter circuits 314a to 314d
Multiplexing / demultiplexing circuit 3 which has received speed-adjusted data from
15 multiplexes these data and passes them to the overhead selection circuit 317 as 64 kbps data.

The overhead selection circuit 317 assigns the control channel of the controlled device to an arbitrary overhead and passes it to the overhead extraction and insertion circuit 316.

The path overhead extraction and insertion circuit 316 inserts 64 kbps data into the bytes assigned by the overhead selection circuit 317 in the SDH path overhead and transmits the data to the SDH multiplexer 322.

The path overhead extraction and insertion circuit 326 of the SDH multiplexer 322 extracts the F2 byte of the SDH path overhead received from the SDH multiplexer 316 and passes it to the demultiplexer 225.

From the demultiplexing circuit 325 to the controlled device 321
The processing of the data up to "a" is the same as in the second embodiment, and a description thereof will be omitted.

Unlike the second embodiment, the third embodiment includes overhead selection circuits 160 and 260 so that the control channel of the controlled device can be assigned to an overhead other than F2.

Although the present invention has been described based on the embodiments, the present invention is not limited to these embodiments, and it is understood that changes and improvements can be made within the ordinary knowledge of those skilled in the art. Of course.

[0053]

According to the present invention, for example, in an application in which a subscriber line carrier is connected to an SDH multiplexer as a controlled device, the control channel of the subscriber line carrier is controlled by the SDH multiplexer. Is provided, it is possible to manage and control the subscriber line carrier of another base station from the control terminal of one base station without using a modem and a telephone line.

Further, according to the second embodiment of the present invention, since a demultiplexing circuit is provided, a plurality of communication paths can be provided, and there is an effect of improving communication efficiency.

Further, according to the third embodiment of the present invention, there is an effect that the overhead for assigning the control channel of the controlled device can be selected.

[Brief description of the drawings]

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

FIG. 2 is a functional block diagram according to a second embodiment of the present invention.

FIG. 3 is a functional block diagram according to a third embodiment of the present invention.

FIG. 4 is a functional block diagram of a conventional control signal transmission system.

[Explanation of symbols]

110, 120, 210, 220, 310, 320, 4
10, 420 Base station 111, 211a-d, 311a-d, 412 Control terminal device 112, 122, 212, 222, 312, 322, 4
11,421 SDH multiplexer 113,123,213a-d, 223a-d, 313
a-d, 323a-d serial interface circuits 114, 124, 214a-d, 224a-d, 314
a-d, 324a-d Bit rate converter circuits 115, 125, 216, 226, 316, 326 Path overhead extraction and insertion circuits 121, 221a-d, 321a-d, 422 Controlled devices 215, 225, 315, 325 Demultiplexing Circuits 317, 327 Overhead selection circuit 402 Telephone network 413, 423 Modem

Claims (6)

[Claims] 1. A control terminal device and a first SDH (Syn)
chronous Digital Hierarch
y) a control signal for controlling the controlled device by the control terminal device between a first base station having a multiplexing device and a second base station having a controlled device and a second SDH multiplexing device; , Wherein the control signal inserted in the SDH path overhead is transmitted via the first and second SDH multiplexers. 2. The control signal transmission method according to claim 1, wherein a plurality of said control signals are multiplexed and inserted into an SDH overhead. 3. The control signal transmission method according to claim 1, wherein the control signal is inserted.
A control signal transmission method, wherein a path overhead is selectable. 4. An SDH multiplexer, wherein at least one of a control terminal device and a controlled device is connected to transmit and receive control signals to and from the external device, and the external device and the SDH multiplexer are connected to each other. , A serial interface circuit which is an interface for inputting and outputting the control signal, a bit rate converter circuit for converting a data transfer rate of the control signal, and an SDH path overhead for inserting the control signal into the SDH path overhead. And a path overhead extraction / insertion circuit for extracting the control signal from the SDH multiplexer. 5. The SDH multiplexer according to claim 4, further comprising: a plurality of the serial interface circuits; a plurality of the bit rate converter circuits; and a demultiplexing circuit that multiplexes and demultiplexes the plurality of control signals. The demultiplexing circuit multiplexes a signal received from the bit rate converter circuit and outputs the multiplexed signal to the path overhead extraction and insertion circuit, and separates a signal received from the path overhead extraction and insertion circuit into the plurality of bit rate converter circuits. An SDH multiplexing device characterized in that the multiplexed data is output. 6. The SDH multiplexer according to claim 5, further comprising an overhead selection circuit which is a circuit for selecting an SDH path overhead into which the control signal is inserted by the path overhead extraction and insertion circuit. Multiplexer.