JPH03117233A - Sub information signal transmission system - Google Patents

Abstract

PURPOSE:To easily grasp and monitor the entire system by using one transmission system for a transmission system of a sub information signal, using other transmission system for a reception system, superimposing a sub information signal bit separated from a transmission signal of the transmission system onto the transmission signal with an alternate channel and sending the resulting signal to any terminal station equipment. CONSTITUTION:When a sub information signal exists in a transmission signal coming through a transmission system A from a terminal station equipment 11, a sub information signal separate section 22 separates the sub information signal. Moreover, a sub information signal monitor section 23 an idle channel for the transmission signal by monitoring the transmission signal including the sub information signal through a transmission system B. A sub information signal insert section 21 insets the sub information signal to the idle channel and sends the resulting signal to the terminal station equipment 11. A sub information signal bit exchange section 25 replaces the sub information signal sent through the transmission system B in the terminal station equipment 11 into a bit of the transmission signal passing through the transmission system A and sends the resulting signal to a prescribed equipment. The priority is set by controlling the sub information signal bit exchange section 25.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a sub-information signal transmission system in an optical transmission system.

(Prior Art) As an optical transmission system, signals are transmitted through a pair of transmission systems with opposite transmission directions, which are formed by connecting a pair of terminal equipment and a repeater placed between these terminal equipment. There is an optical transmission system that sends and receives data, and some of these optical transmission systems employ a sub-information signal transmission method in which a sub-information signal is added to the transmission signal to retransmit the data signal between devices. be.

That is, in this sub-information signal transmission method, for example, as shown in FIG. 3, a sub-information signal (AUX) slot is prepared in one frame of the transmission signal when configuring the signal frame, and the transmitting side device uses this sub-information signal slot. A transmission signal is transmitted with a sub-information signal inserted therein, and the sub-information signal is separated from the transmission signal and received by the debt collection device.

Conventionally, in order to transmit sub information signals between devices in this transmission method, a pair of transmission systems with opposite directions is used.
A method is adopted in which the sub information signal is transmitted between devices by separating the sub information signal from the transmission signal for each device and inserting the sub information signal into the transmission signal by the device that requires transmission. was. An example of this conventional sub-information signal transmission system will be explained with reference to FIG. In the figure, 11 is a terminal device, and 12 is a relay device 2. The terminal device 11 includes a sub information signal insertion section 21, a sub information signal separation section 22, and a sub information signal processing section 24, and the relay device 12 includes a sub information signal insertion section 21 and a sub information signal separation section 22. , a sub-information signal monitoring section 23 , and a sub-information signal processing section 24 . A plurality of relay devices 12 are arranged side by side between one terminal device 11 and the other terminal device 11 . (In the drawing, one terminal device 11 is ST1, and the next relay device 12 is ST1.
2, and thereafter the relay device 12 is numbered as STj, and the other terminal device 11 is numbered as STm. ) A unidirectional transmission system A is configured by connecting the sub information signal insertion section 21 of each terminal device 11 and the sub information signal separation section 22 and sub information signal insertion section 21 of each relay device 12. When attempting to connect the sub information signal separation unit 22 of the station device 11 and the sub information signal separation unit 22 and sub information signal insertion unit 21 of each relay device 12 to transmit a data signal between the other 12-8T2. First, the sub information signal separation unit 22 on the transmission system B side of the relay device 12-8Tj monitors the sub information signal in the transmission signal, and the sub information signal monitoring unit 23 searches for an empty channel in the transmission signal.

When the sub information signal processing unit 24 receives a lost signal of an empty channel from the sub information signal monitoring unit 23, the sub information signal processing unit 24 sends a call signal specially assigned to the device to be received, in this example, the relay device 12-3T2, and the relay device 12. -5Tj is being sent, is inserted into an empty channel in the transmission signal by the sub-information signal insertion section 21, and sent to the transmission system B.

On the other hand, the relay device 12-3T2 is the relay device 12-5Tj
The sub information signal in the transmission signal sent to the transmission system B is monitored by the sub information signal separation section 22 and the sub information signal monitoring section 23, and a calling signal for the relay device 12-3T2 is detected.

The detected call signal is processed by the sub-information signal processing unit 24 and sent to the destination of the call signal, in this example, the relay device 12-3.
Get to know Tj. Next, using the transmission system A, the relay device 12-3T2 superimposes the sub information signal on the transmission signal and transmits it to the relay device 12-5Tj in the same manner as described above.

As a result, relay device 12-5Tj and relay device 12-3T
A line for transmitting and receiving sub-information signals to and from the terminal 2 is established and data transmission begins.

(Problem to be Solved by the Invention) However, in such a transmission system, each terminal device 11 and each relay device 12 inserts a sub information signal into the transmission signal for both transmission system A and transmission system B, respectively. Since it has the function of separating the sub information signal from the transmission signal, that is, the sub information signal inserting section 21 and the sub information signal separating section 22, each terminal device 11 and each relay device 12 can be operated independently. This makes it possible to insert and separate the sub information signal from the transmission signal.

However, if each device that makes up the transmission equipment inserts and separates the sub-information signal from the transmission signal individually and independently, it becomes difficult to determine how the channels of the sub-information signal are used in the transmission signal in the optical transmission system as a whole. There was a problem in that it was difficult to grasp what was going on. Furthermore, if it is difficult to grasp the use status of the sub information signal channels in the transmission signal for the transmission apparatus as a whole, there is also the problem that it becomes difficult to prioritize the sub information signals.

The present invention has been made based on the above-mentioned circumstances, and it is possible to grasp the usage status of the channel of the sub information signal in the transmission signal in the optical transmission system as a whole, and it is possible to transmit the sub information signal with priority. The purpose is to provide a signal transmission method.

[Configuration of the Invention (Means for Solving the Problems) To achieve the above object, the sub information signal transmission system of the present invention comprises a pair of terminal devices and a relay device disposed between these terminal devices. An optical transmission system that sends and receives signals through a pair of transmission systems in the transmission direction or in opposite directions formed by connecting the sub-information signal bits. In the sub-information signal transmission method, the terminal station device and the relay device transmit signals to one of the pair of transmission systems. A means for monitoring the usage status of the sub-information signal bit in the transmission signal and inserting the sub-information signal when the bit is vacant, and a means for inserting the sub-information signal from the transmission signal by burning it into the other transmission system. The present invention is characterized in that it includes means for separating, and means for exchanging sub information signal bits in the transmission signal in one of the pair of terminal devices.

That is, in the transmission system of the present invention, one transmission system is a sub information signal transmission system, the other transmission system is a sub information signal reception system, and either one of the terminal equipments is provided with a sub information signal separated from the transmission signal. It has a circuit switching function that switches bits and channels, superimposes them on a transmission signal, and sends this transmission signal to the transmission system.

(Function) Since the terminal equipment with line switching function collectively sets the sub information signal line, the transmission of the sub information signal between each device is always done using the sub information signal bit provided in the terminal equipment. Although this is done through the exchange means, it is possible to grasp the usage status of the sub information signal in the entire optical transmission system, and it is also possible to set the channel usage priority of the sub information signal and transmit it.

(Embodiment) An embodiment of the sub-information signal transmission system of the present invention will be described below with reference to the drawings.

FIG. 1 shows the structure of the sub-information signal transmission system of this embodiment. In the figure, 11 is a terminal device, 12 is a relay device, and 13 is a terminal device.
is the terminal equipment.

One terminal device 11 includes a sub information signal inserting section 21 and a sub information signal separating section 22 for transmission system A, a sub information signal inserting section 21 and two sets of sub information signal separating sections 22 .
22, and further includes a sub information signal monitoring section 23, a sub information signal processing section 24, and a sub information signal bit exchange section 25. The other terminal device 13 includes a sub information signal separating section 22 for transmission path A and a sub information signal inserting section 21 for transmission path B.
It further includes a sub-information signal monitoring section 23 and a sub-information signal processing section 24. The relay device 12 is a transmission path A.
A sub information signal separating section 22 for the transmission line B, a sub information signal inserting section 21 and a sub information signal separating section 22 for the transmission path B, and a sub information signal monitoring section 23 and a sub information signal processing section 24. ing.

A number of relay devices 12 are arranged in parallel between one terminal device 11 and the other terminal device 13. (In the drawing, one terminal device 11 is STI, and the next relay device 12 is STI.
Thereafter, the relay device 12 is numbered as STj, and the other terminal device 11 is designated as STm. ) The sub information signal insertion section 21 and the sub information signal separation section 22 for the transmission path A of the terminal device 11 , the sub information signal separation section 22 for the transmission path A of each relay device 12 , and the sub information signal separation section 22 for the transmission path A of the terminal device 13 The transmission system A is connected to the sub information signal separation unit 22 for the transmission path A.
13 sub information signal insertion section 21 of the other terminal device.
and a sub information signal separation unit 2 for transmission path B of each relay device 12.
2 and the sub information signal insertion section 21, and one terminal device 11
A transmission system B is configured by connecting the sub information signal separating section 22, 22 and the sub information signal inserting section 21 for the transmission path B.

That is, the transmission system A is connected from the terminal device 11 to each device 11.1.
A transmission signal and a sub information signal are sent to each device 1.
1.13 receives this, and transmission system B transmits the transmission signal and sub information signal from each device 12.13.

Therefore, the terminal devices 11 and 13 and the relay device 12 use the sub information signal separation section 22, the sub information signal monitoring section 23, the sub information signal processing section 24, and the sub information signal insertion section 21 to It has a function of monitoring the usage status of a sub information signal bit and inserting a sub information signal when the bit is in an empty state.
It has a function to separate specified sub-information signals from transmission signals passing through. Furthermore, the terminal device 11 has a function of exchanging sub information signal bits between the transmission signal transmitted from the transmission system B and the transmission signal transmitted to the transmission system A using the sub information signal bit exchange section 25. There is.

The operation of the sub-information signal transmission system configured as described above will be explained.

The sub information signal for transmission is transmitted from the relay device 12 and the terminal device 13 and is superimposed on the transmission signal passing through the transmission system B and sent to the terminal device 11, and the sub information signal bit of the terminal device 11 is The bits are exchanged in the exchange section 25, and the signal is ffi-folded into the transmission signal passing through the transmission path A, and then sent to each device. In the terminal device 11, the relay device 12, and the terminal device 13, the sub information signal separation unit 22 monitors the transmission system A, and the terminal device 11
If there is a sub information signal in the transmission signal sent from the transmission system A through the transmission system A, the sub information signal separation unit 22 separates the sub information signal. Further, the sub information signal 22 monitors the transmission signal passing through the transmission system B, and the sub information signal monitoring unit 23 searches for an empty channel in the transmission signal. The sub information signal insertion unit 21 inserts the sub information signal into an empty channel of the transmission signal and transmits it to the terminal device 11 through the transmission system B.

In the terminal device 11, the sub information signal bit exchange unit 25 replaces the sub information superimposed on the transmission signal sent from a predetermined device through the transmission system B with the bits of the transmission signal passing through the transmission system A. Send to the specified device.

Next, an example of the operation of transmitting and receiving sub information signals between each device will be described.

Now, in FIG. 1, the relay device 12-8Tj is the relay device 1.
I am trying to exchange data with 2-8T2.

In the relay device 12-3Tj, the sub information signal separation unit 22.22
The sub-information signal monitoring section 23 monitors the transmission system A and the transmission system B. For example, assuming that the frame of the sub information signal has the configuration shown in FIG. Transmission system B sends a call signal containing information specifying the destination to which it wants to send.
send to the side. This call signal is sent to the terminal equipment 1l-8T.
When I is detected, the sub information signal bit exchange unit 25 converts the data of channel chk and channel ch2, which are unused channels of the sub information signal on the transmission system A side, for example, in FIG.
The sub information signal of transmission system B is inserted into transmission system A with the remaining data unchanged. Further, the relay device 12-3T2 monitors the sub information signal of the transmission system A in the same operation as the terminal station device 11-STI described above. While monitoring, if the relay device 12-5T2 detects the calling signal for 0 minutes and the channel in use, it sends a response signal to the transmission system B on the same detected channel chk. As a result, relay device 12-5
Data transmission is started between Tj and relay device 12-5T2, and the terminal device 1l-STI monitors this.

In this way, the transmission of the sub information signal between each device 11 to 13 is always performed via the sub information signal bit exchange section 25 provided in the terminal device 11, and the usage state of the channel of the sub information signal is always The optical transmission system as a whole can be monitored and grasped. Furthermore, by controlling the sub-information signal bit exchange section 25 of the terminal device 11, it is possible to set the priority of channel use of the sub-information signal.

According to the formula, one transmission system is a sub-information signal transmission system, the other transmission system is a sub-information signal reception system, and either one of the terminal stations is provided with sub-information signal bits separated from the transmission signal of the transmission system. It has a line switching function that swaps the channels, superimposes it on the transmission signal, and sends this transmission signal to the receiving system.
Transmission of sub-information signals between each device is always performed via the sub-information signal pit exchange section provided in the terminal equipment, and the usage status of the sub-information signal channel is always monitored and understood as a whole optical transmission system. can do. Furthermore, by controlling the sub-information signal bit exchange section of the terminal device, it is possible to set the priority of channel use of the sub-information signal.

[Brief explanation of drawings]

FIG. 2 is a time chart showing signal transmission, and FIG. 3 is a diagram showing it. 11.13... Terminal device, 12... Relay device, 21
...Sub information signal insertion section, 22...Sub information signal section, 2
3...Sub information signal monitoring unit, 24...Sub information signal processing unit, 25...Sub information signal bit exchange unit.

Claims (1)

[Claims] An optical transmission system that sends and receives signals via a pair of transmission systems with opposite transmission directions formed by connecting a pair of terminal devices and a relay device arranged between these terminal devices, In a sub-information signal transmission method in which a sub-information signal bit is superimposed on a transmission signal and the sub-information signal bit is used to transmit a signal between the terminal station device and the relay device, the terminal station device and the relay device The relay device includes means for monitoring the use state of the sub information signal bit in the transmission signal for one of the pair of transmission systems and inserting the sub information signal when the bit is in an empty state. and means for separating a specified sub-information signal from the transmission signal for the other transmission system, and having one of the pair of terminal devices exchange the sub-information signal bits in the transmission signal. A sub-information signal transmission method characterized by comprising means.