JPH0447843A - Data communication system and data transmitting method - Google Patents

Abstract

PURPOSE:To enable data communication with a counter station even when alarming the counter station in respect to a data link bit fixed to a prescribed bit data when warning the counter station by adding violation according to the contents of a desired data to be transmitted. CONSTITUTION:In a normal state, a bit data 103 of the data link bit is transmitted through a violation adding circuit 4 to the counter station after being multiplexed to an F bit of a main data signal as it is. When warning the counter station, the data 103 is fixed to '1' by a reception fault detecting signal 101, multiplexed to the F bit of the main signal and outputted to the circuit 104. Simultaneously, a violation generating circuit 2 generates a violation timing signal 106 and outputs it to the circuit 4 corresponding to the data 104. In the circuit 4, the violation is applied to the frame data at the timing of the signal 106, and the data is transmitted to a transmission line. Thus, when warning the counter station, the data can be transmitted to the counter station.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to, for example, a data communication system and a data transmission method in which a data communication method in a PCM terminal device is improved.

Regarding.

(Conventional technology) PCM (Pulse Code Modulation)
; pulse code modulation), in communication transmission between PCM terminal devices, for example, 1
Considering the next group frame structure, it is as shown in FIG. 4(a). That is, as shown in the figure, each channel from 1CH to 24CH is arranged after the F bit (frame bit), and the F bit is 1 bit, and the channels from 1CH to 24CH are arranged after the F bit (frame bit).
Each of the 24 CHs has an 8-bit configuration. Then, such a frame pattern is repeated 24 times (new frame configuration) or 12 times (24B) as shown in Figure 5.
Frame structure) A repeating multi-frame structure is adopted, and the repeating pattern of the F bit is shown in Figure 4(b).
It's something like this.

In other words, if the frame pattern is repeated 24 times, the F bit is used as the data link bit D in the first frame (frame number 1), and as the code error detection code in the second frame (frame number 2). CR
C (Cyclic Redundancy Check)
In the third frame (frame number 3), it is used as data link bit D, and so on.
5th frame (frame number 5), 7th frame (
Frame number 7), 9th frame (frame number 9)
, 11th frame (frame number 11)... 2nd frame
In odd-numbered frames up to the third frame (frame number 23), the F bit is used as the data link bit D.

Then, the data link bit D is set to D-1° when transmitting a local station alarm.In other words, in the local station, for example, when the line is disconnected and transmission from the transmitting station is interrupted, the data link bit D is - Set to "1" and transmit the frame to the opposite station.

In this way, conventionally, in communication transmission between PCM terminal devices, when a game alarm is issued, the data link bit D is simply fixed to "1" and transmitted to the game; There was no data communication to the opposing station used.

(Problems to be Solved by the Invention) As described above, in the conventional communication transmission system between PCM terminal devices, multiple channel data are multiplexed, frames are transmitted in a predetermined frame structure including the F bit, and the transmit to the station. The F bit is one bit, and by making the frame a multi-frame structure, data link bits, CRC, etc. that are transmitted using the F bit can be transmitted effectively. The data link bit is also used to send an alarm to the opposite station, but conventionally in this case the data link bit D is fixed to "1". By fixing the data link bit D to "1" in this way, it is possible to transmit an alarm from the own station.

However, in the past, the data link bit D was only fixed at "1" and transmitted, and therefore, data communication using the data link bit to the opposite station could not be performed at the time of an alarm. As a result, the opposing station is only notified that an alarm has been issued, and even if it wanted accompanying information, it was unable to exchange data for that purpose.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a data communication system and a data communication method that allow data communication with an opposing station using data link bits even when a game alarm is issued.

[Configuration of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention is configured as follows. That is, the transmission frame of the main signal is converted into a bipolar code and transmitted, and the F bit in the transmission frame of the main signal is used as a data link bit, and this data link bit is fixed to predetermined bit data at the time of game alert. In a data transmission system that transmits data, a violation (Violation
) (to cause a coding rule violation), and when the desired transmission data to be transmitted is given, the violation timing generating means generates the data link bit at the generation timing according to the content of this data. In addition, a violation adding means for adding a violation is provided on the transmitting side, and a separating means for separating and extracting the data link bit from the F bit of the received frame and a separating means for separating and extracting the data link bit from the F bit of the received frame are provided on the receiving side. The device is constructed by providing a violation detection means for detecting a violation from the data link bits and a reproduction means for reproducing data according to the violation detected by the violation detection means.

In addition, at the time of a game alarm, the transmitting side gives the desired transmission data to be transmitted, and also causes a coding rule violation to occur in accordance with the contents of the desired transmission data to be transmitted with respect to the data link bits fixed to predetermined bit data. , so that data is attached, and on the receiving side, the data link bit is separated and extracted from the F bit of the received transmission frame, a violation of the coding rule is detected from the separated and extracted data link bit, and the coding rule is It is characterized by reproducing data according to the violation.

(Function) This device with such a configuration converts the main signal transmission frame into a bipolar code and transmits it, and also uses the F bit in the main signal transmission frame as a data link bit, and uses this data at the time of game alert. In a data transmission system in which link bits are fixed to predetermined bit data and transmitted, the violation timing generation means generates a violation for the data link bits fixed to predetermined bit data at the time of a game alarm, that is, A timing for causing a code rule violation is generated and given to the violation adding means.

At this time, when the desired transmission data to be transmitted is given, the violation adding means causes a violation, that is, a violation of the coding rule, to the data link bit at the generation timing of the violation timing generating means according to the content of this data. Then, the transmission frame containing this coding rule violation is sent to the opposite station.

On the other hand, on the receiving side of the opposite station, a separating means separates and extracts the data link bit from the F bit of the received frame. The violation detection means detects a violation from the data link bits separated and extracted by the separation means, and the reproduction means reproduces data according to the violation (code rule violation) detected by the violation detection means.

In this way, when a game alarm is issued, the data of the data link bit is fixed to a predetermined value, for example, "1", and is sent to the opposing station. Since data communication is performed by incurring a violation, data communication, which was not available in previous methods, becomes possible when a game alarm is issued, and the F bit can be used effectively.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block configuration diagram of a transmitting section showing an embodiment of a communication system according to the present invention, and 101 is a reception failure detection signal outputted by a monitoring device of its own station when a reception failure is detected. 1 means that the data link bit D is set to “1” when the opposing station is alerted.
This is a circuit for fixing the reception failure detection signal 1 to
When receiving 01, this control circuit controls the data link bit D to be fixed at "1".

Reference numeral 2 denotes a violation timing generation circuit that generates a timing for applying a violation to the data link bit D, and receives as input data 104 to be transmitted to the opposing station at the time of game alarm, a data link timing signal 105, and a reception failure detection signal 101. At the same time, upon receiving the reception failure detection signal 101, a violation timing is generated in accordance with the data link timing signal 105 and data 104.

Here, a violation is a violation of the coding rule of a coded signal with respect to input data, and the violation timing is for providing timing for causing a violation of the coding rule with respect to transmission data according to the input data.

3 is a multiplexing circuit that multiplexes the data link bit D to the F bit of the main signal, and the output of the control circuit 1 and the main signal data 1 are multiplexed.
02, the data link bit D is multiplexed onto the F bit of the main signal in the insertion frame.

4 is N RZ (Non Return to Zer)
o) A M I (Alternate Ma
This is a violation adding circuit that converts the signal into a rk inversion (bipolar code) signal and adds a violation in accordance with the violation timing signal 10B at the time of conversion. Normally, the output from the multiplex circuit 3 is converted into an AMI signal and output as transmission frame data, and
When the violation timing signal 106 is given, when the output from the multiplex circuit 3 is converted into an AMI signal, a violation is added in accordance with the violation timing signal 10B and output as transmission frame data. .

Although not shown, the station includes a monitoring device, which has a function of monitoring the received signal, detecting line disconnection, decrease in the level of the received signal, increase in error rate, etc., and outputting a reception failure detection signal 101. Main signal data l (H is the frame structure obtained by multiplexing the data of each channel to be transmitted. There are F bits in the frame to be transmitted and received, and the F bit for each predetermined frame is
The bit is used as the data link bit D, and the data given to the data link bit D is bit data 103.

104 attempts to transmit to the opposing station at the time of game alert 4
This data is kbps data, and in this device, this data is transmitted by violation using the data link bit in the F bit. 105 is a data link timing signal, 106 is a violation timing signal, and 107 is data of an AMI signal transmitted to the opposite station.

The above is the main configuration of the transmitter. Next, the configuration of the receiving section will be explained.

FIG. 2 is a block diagram showing the configuration of the receiving section, where 5 is a code conversion circuit that converts the received AMI signal 108 into an NRZ signal, and 6 is a violation detection circuit that detects a violation from the received AMI signal 108. , 7 is a data link bit separation circuit that separates data link bits from the received main signal. It separates and outputs it.

8 is a regeneration circuit that regenerates 4 kbps data from the detected violation, and performs data regeneration based on the violation of the coding rule based on the output from the violation detection circuit 6 in synchronization with the data link timing signal 109. While receiving the output control signal 110 from the detection circuit 9, it outputs the reproduced data. Detection circuit 9
detects a match alarm from the data link bit data separated by the data link bit separation circuit 7, and outputs an output control signal 110 while the match alarm is present when a match alarm is detected.

Data 108 is data of the AMI signal received from the opposing station, and data link timing signal 109 is synchronized to the position of the data link bit by a frame synchronization signal detected by the synchronization detection system of the own station (not shown) based on the received frame. A control system (not shown) generates this. Also, on the transmitting side, data 104 is 4 kbp when a game alert is issued.
Since the signal is sent at 4 kbps, the device 111 comprising the reproducing circuit 8 at the time of game alarm is also transmitted at 4 kbps.

The operation of this device having such a configuration will be explained.

First, to explain the transmission system, when a monitoring device (not shown) determines that there is no failure, a reception failure detection signal 101 is sent.
is not output, the control circuit 1 outputs the bit data of the data link bit in synchronization with the F bit of the main signal data to be transmitted and in synchronization with the transmission frame used for transmitting the data link bit. Here, synchronization of the F bit position in the transmission frame used for transmitting the data link bit is performed by a data link timing signal generated by a timing control system (not shown) in the local station so as to meet this condition.

The bit data 103 of the data link bit given by the control circuit 1 is input to the multiplexing circuit 3, and the multiplexing circuit 3 multiplexes the bit data 103 of the data link bit directly onto the main signal F bit as an NRZ signal, which is sent to the violation adding circuit 4. However, since there is no reception failure detection signal, the violation timing circuit 2 does not generate the violation timing signal 106. Therefore, the violation addition circuit 4 converts the input NRZ signal into an AM signal.
Convert it to an I signal and output it as is to the transmission line,
Transmit to the opposite station.

Therefore, in the normal state, the bit data 103 of the data link bit given by the control circuit 1 to be transmitted is multiplexed as is into the F bit of the main signal data by the multiplexing circuit 3, and then the AMI
It is converted into a signal, output to a transmission path, and transmitted to the opposite station.

At the time of game alarm, a reception failure detection signal 101 is generated from a monitoring device (not shown), and the control circuit 1 that receives this reception failure detection signal 101 fixes the bit data of the data link bit to "1 degree." Then, the control circuit 1 provides fixed data "1" to the multiplex circuit 3 in synchronization with the F bit of the main signal data to be transmitted and in synchronization with the transmission frame used for transmitting the data link bit.

The multiplexing circuit 3 multiplexes the fixed data "1" received from the control circuit 1 onto the main signal F bit, and outputs it to the violation addition circuit 4 as an NRZ signal.

At the same time, the violation timing generation circuit 2 that has received the reception failure detection signal 101 generates a biosignal according to the bit content of the data 104 based on the input 4 kbps data 104 and the data link timing signal 105. A ration timing signal 10B is generated and output.

This is because the input 4 kbps data 104 is transmitted using coding rule violation, and when the violation timing generation circuit 2 is given the data link timing signal 105, the data fixed to "1" is transmitted. For the link bit, a violation timing signal 106 is generated according to the data 104 and output to the violation adding circuit 4. The violation addition circuit 4 converts the frame data input as an NRZ signal from the multiplexer circuit 3 into an AMI signal, applies a violation in accordance with the timing of the violation timing signal 106, and transmits it as an AMI signal 107. transmit to the road.

The violation addition in the violation addition circuit 4 is given as data to be transmitted at the time of failure.
Since this is done in accordance with the contents of the kbps data 104, as a result, it becomes possible to transmit 4 kbps data to the opposing station using the data link bit at the time of game alarm.

On the other hand, in the receiving section having the configuration as shown in FIG. 2, the data of the received frame in the AMI signal format is code-converted into an NRZ signal by the code conversion circuit 5, and the data of the received frame that has been code-converted is , are applied to the data link bit separation circuit 7. Then, the data link bit separation circuit 7 selects the data 1 of the data link bit.
12 are separated. The separated data link bit data 112 is output to the receiving station processing system side and also to the detection circuit 9. The detection circuit 9 receives this data link bit data 112 and detects the presence or absence of a game warning.

As a result, if there is a game warning, the detection circuit 9 generates an output control signal 110 and supplies it to the reproduction circuit 8.

On the other hand, in the violation detection circuit 6, the received AMI
A violation is detected from the signal and the violation detection signal is provided to the regeneration circuit 8.

Therefore, while receiving the output control signal 110, the reproduction circuit 8 performs data reproduction based on the violation of the coding rule based on the violation detection signal in accordance with the data link timing signal 109, and outputs the reproduced data.

In this way, when there is a game warning, the reproducing circuit 8 performs data reproduction based on the violation of the coding rule in accordance with the reception timing of the data link bit, and outputs the reproduced data. As a result, 4 kbps data 111 is reproduced.

Further, when the detection circuit 9 does not detect a game alarm, the detection circuit 9 does not output the output control signal 110, so the reproduction circuit 8 does not output reproduction data or does not reproduce it. Furthermore, the data link bits 112 are separated by passing the conversion output of the code conversion circuit 5 through the data link bit separation circuit 7, but since the data after the data link bit separation is the main signal component, this is not necessary at the receiving station. , and use it as received data for each channel.

In this manner, in the normal state, the data link bits 112 of the code-converted received frame data are separated by the data link bit separation circuit 7. At the time of game alarm, the violation detection circuit 6 detects the received AMI signal.
, a violation is detected, and the data link timing signal 109 and output control signal 110
The data 111 of s is reproduced.

As a result, the 4 kbps data transmitted by the transmitter shown in FIG. 1 is received by the receiver shown in FIG. 2, allowing data communication at the time of game alert.

FIG. 3 is a frame configuration diagram and F bit pattern of a 24-channel ψ multiframe used in the system of the present invention, where the D bit is the data link bit, and E is the C
Each represents the contents of the RC. ′! As is clear from Figure 4, the J3 diagram is the same as the conventional 24-channel multiframe frame configuration diagram and F bit pattern shown in Figure 4, and the F bit uses a new frame configuration. are doing. However, the format shown in Figure 3 is just an example, and as long as the technical idea of the present invention is applicable,
It is not limited to this.

As explained above, in the present invention, the transmission frame of the main signal is converted into a bipolar code and transmitted, and the F bit in the transmission frame of the main signal is used as a data link bit, and this data link bit is used at the time of game alert. In a data transmission system that fixes the value to a predetermined bi-soto data (for example, "1") and transmits it, "1" is transmitted when a game alarm occurs.
” The desired information is transmitted using the violation by adding a violation to the data link bit, which is fixed to ``. By adding a violation, for example, 4 kbp
It is now possible to send desired data at a rate of Since data communication can be performed by extracting the violation and reproducing 4 kbps data from the violation, there is an advantage that data link bits can be used effectively.

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with appropriate modifications within the scope without changing the gist thereof.

[Effects of the Invention] As detailed above, according to the present invention, the transmission frame of the main signal is converted into a bipolar code and transmitted, and the F bit in the transmission frame of the main signal is used as a data link bit, and the In a data transmission system that fixes this data link bit to a predetermined bit piggy and transmits it at the time of an alarm, the data link bit can be used to perform data communication at the time of a game alarm, so the data link bit can be used effectively. can

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram of a main part of a transmitting section showing an embodiment of the present invention, FIG. 2 is a schematic block diagram of a main part of a receiving section showing an embodiment of the present invention, and FIG. The figure shows the frame structure used in the system of the present invention and the contents of the F bit by frame number. Figure 4 shows the frame structure used conventionally and the contents of the F bit by frame number. The figure is a diagram for explaining transmission using a multi-frame configuration. 1... Control circuit, 2... Violation timing generation circuit, 3...
・Multiple circuit, 4... Violation addition circuit, 5.
... Code conversion circuit, 6... Violation detection circuit, 7... Data link bit separation circuit, 8... Regeneration circuit, 9... Detection circuit, 101... Reception failure detection signal, 102. ...Main signal data, 103...Bit data given to the data link bit, 104...Data sent to the opposing station at the time of game alarm, 105...Data link timing signal, 10B...Violation timing signal, 107...Transmission signal to the opposite station (AMI
signal), 108... Received signal (AMI signal), 109
. . . Data link timing signal, 110 . . . Output control signal, 111 . . . Data output from the reproduction circuit 8.

Claims (2)

[Claims] (1) Converting the transmission frame of the main signal into a bipolar code and transmitting it, and
In a data transmission system that uses a bit as a data link bit and transmits the data link bit fixed to a predetermined bit data at the time of a match alert, the data link bit is fixed to a predetermined bit data at the time of a match alert, and the bio Violation timing generation means that gives timing for applying a violation, and when desired transmission data to be transmitted are given, a violation is added to the data link bit at the generation timing of the violation timing generation means according to the contents of this data. A violation adding means is provided on the transmitting side, and a separating means for separating and extracting data link bits from the F bit of a received frame is provided on the receiving side, and a violation is added on the receiving side from the data link bits separated and extracted by this separating means. 1. A data communication system comprising: a violation detection means for detecting a violation; and a reproduction means for reproducing data according to the violation detected by the violation detection means. (2) Converting the transmission frame of the main signal into a bipolar code and transmitting it, and
In a data transmission method in which bits are used as data link bits and the data link bits are fixed to predetermined bit data and transmitted at the time of a game alert, the transmitting side gives the desired transmission data to be transmitted and also transmits the data at a game alert. A coding rule violation is caused for the data link bit fixed in the bit data of , according to the contents of the desired transmission data to be transmitted, and data is added thereby, and on the receiving side, the F of the received transmission frame A data transmission method comprising separating and extracting data link bits from the bits, detecting a coding rule violation from the separated and extracted data link bits, and reproducing data in accordance with the coding rule violation.