JP3132685B2 - Transceiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission / reception device which connects a device to a device with a connection line and transmits / receives a signal via the connection line, and simply tests the connection state of the connection line. Is made possible.

[0002]

2. Description of the Related Art Conventionally, as this kind of connection line test technique, the normality of the connection line connection is tested by using a game device alarm in a frame format.

FIG. 5 shows the configuration.

[0005] As shown in FIG. 5, in the conventional transmitting / receiving apparatus, a transmitting circuit 11 is provided with an insertion circuit 12 for inserting a game device alarm signal into a transmission signal, and a game device alarm generating circuit 13. A failure detection circuit 22, a transmission line alarm detection circuit 23, and an alarm processing circuit 24 are provided. The output of the transmission line failure detection circuit 22
And the other output of the transmission path failure detection circuit 22 is input to the alarm processing circuit 24 and also to the remote control apparatus alarm generation circuit 13. Game device alarm generation circuit 1
The output of No. 3 is inserted into the transmission signal by the insertion circuit 12. The output of the transmission line alarm detection circuit 23 is input to the alarm processing circuit 24.

Now, when the test is performed, a test instruction is given to the game device alarm generation circuit 13, and the game device alarm generation circuit 13 generates a game device alarm and is inserted into the transmission signal via the insertion circuit 12. . When the test is performed in the opposing transmission circuit, the transmission line failure detection circuit 22 receives the signal in which the device alarm is inserted and sends it to the transmission line alarm detection circuit 23. The transmission line alarm detection circuit 23 detects a game device alarm contained in the signal, and
4 and the alarm processing circuit 24 notifies the failure. When a failure of the signal received by the receiving circuit 21 occurs, the transmission line failure detecting circuit 22 detects the failure, and the fact is transmitted to the alarm processing circuit 24 to notify the failure. The other output of the transmission line failure detection circuit 22 is transmitted to the game device alarm generation circuit 13, which generates a game device alarm and is inserted into the transmission signal via the insertion circuit 12.

FIG. 6 shows an example of a transmission system using a transmission / reception device having the above-described transmission circuit and reception circuit.

The transmission / reception apparatus T1 includes a transmission circuit S1 having the above-described function of generating and inserting an alarm in the game apparatus, and a receiving circuit R6 having a function of detecting and notifying the alarm of the game apparatus. Transceiver T2
The transmission circuit S4 also has a game device alarm generation / insertion function, and the reception circuit R3 also has a game device alarm detection notification function.
Is provided. The multiplex conversion device M1 includes a transmission circuit S2 having a game device alarm generation / insertion function, a transmission circuit S6 not having a game device alarm generation / insertion function, a reception circuit R1 not having a game device alarm detection / notification function, and a game device alarm detection / notification function. , A multiplex conversion circuit and a separation conversion circuit. Similarly, the multiplex conversion device M2 includes a transmission circuit S3 not having the above-mentioned device alarm generation and insertion function, a transmission circuit S5 having a game device alarm generation and insertion function, a reception circuit R2 having a game device alarm detection notification function, The receiver circuit R4, the multiplex conversion circuit, and the separation conversion circuit which do not have the alarm detection notification function are provided.

The output of the transmission circuit S1 is input to the reception circuit R1 via the connection line L11, and the output of the reception circuit R1 is
The signal is input to the transmission circuit S2 via the multiplex conversion circuit, the output of the transmission circuit S2 is input to the reception circuit R2 via the connection line L12, and the output of the reception circuit R2 is input to the transmission circuit S3 via the separation conversion circuit. The output of the transmission circuit S3 is the connection line L
13 to the receiving circuit R3. The output of the transmission circuit S4 is supplied to the reception circuit R via the connection line L23.
4, the output of the receiving circuit R4 is input to the transmitting circuit S5 via the multiplex conversion circuit, and the output of the transmitting circuit S5 is input to the receiving circuit R5 via the connection line L22, and the output of the receiving circuit R5 is output. Is a transmission circuit S6 via a separation conversion circuit.
And the output of the transmission circuit S6 is connected to the reception circuit R6 via the connection line L21.

In this transmitting / receiving apparatus, the transmitting / receiving apparatus T1
A game device alarm between the transmission and reception device T2 is transmitted to the transmission circuit S1.
In the transmission signal at a in FIG.
And the other is inserted in the transmission signal at e of the transmission circuit S4 and detected at h of the reception circuit R6. Further, the multiplex conversion device M1 and the multiplex conversion device M2
Is inserted into the transmission signal at b of the transmission circuit S2 and detected at c of the reception circuit R2, and the other is inserted into the transmission signal at f of the transmission circuit S5, Detected in g of R5.

[0010]

However, in the above-mentioned conventional system, since the game apparatus alarm is used, the receiving circuit 21 has a problem that it is not possible to determine whether the failure notification is due to a failure or a test. Further, a transmitting circuit S1 for performing a test, a receiving circuit R3 and a transmitting circuit S4 for detecting an alarm of the remote device, a receiving circuit R6 and a transmitting circuit S2.
, A receiving circuit R2 and a transmitting circuit S5, and a receiving circuit R5
Can be confirmed, the transmitting and receiving device T
The connection line L11 and the connection line L21 connecting the multiplexing device 1 to the multiplex conversion device M1 and the connection line L13 and the connection line L23 connecting the transmission / reception device T2 and the multiplex conversion device M2 are not connected to the original connection. there were. Furthermore, since the test can be performed only in one direction, there is a problem that the test must be performed by an operator for each of the transmitting and receiving device for performing the test and the transmitting and receiving device for detecting the alarm of the game device.

According to the present invention, a signal dedicated to a test is added to a signal to be transmitted, and a distinction between an alarm and a test is made clear.
The purpose of the present invention is to provide a transmission / reception device in which the test section is set to be the same as the connection line section so that the connection destination of each connection line can be confirmed, and the test / transmission device can easily perform the test and confirmation. And

[0012]

According to the present invention, in order to achieve the above object, a test transmitting apparatus detects a test signal and a test signal for testing a connection state at an unused portion on a frame format. To the test-side receiving device, the test-side receiving device detects the test signal given on the frame format, and the test-side receiving device sends the response signal on the frame format to the test-side transmitting device. A response is given.

That is, a transmitting circuit and a receiving circuit are provided.
For example, are connected by the transmission and reception device and connection line which faces a transceiver for transmitting and receiving signals via the connecting line, the transmitting and receiving apparatus means for monitoring the connection state of the connecting line is provided, the transmission circuit Means for instructing the generation of a test signal for testing the connection state of the connection line, and a section for generating the test signal and outputting the STM-N frame format.
Means for inserting the unused bytes of ® down overhead, and means for transmitting the test signal in the connection line, the receiving times
The response signal for notifying that the test signal has been detected from the path is over the section of the STM-N frame format.
Insert the unused bytes of the head and means for transmitting along with the test signal, the said reception circuit, coming from the signal received from the connection line and means for detecting the test signal, and detects this test signal the upper Symbol response signal, characterized in that a means for transmitting to the transmitting circuit <br/>.

[0014]

When a test is performed, transmission of a test signal is started from the test-side transmitting device, and the receiving-side device under test detects the test signal and notifies that the test signal has been received. Further, the transmitting device under test starts transmitting a response signal when the receiving device under test detects the test signal, and the receiving device under test detects the response signal and notifies that the response signal has been received. Accordingly, a confirmation test can be performed to determine whether or not the transmission / reception device is connected to a position where the transmission / reception device is originally connected, independently of the alarm, and the test transmission / reception device can perform and confirm the test.

[0015]

EXAMPLES Hereinafter, an embodiment of the present invention with reference to the drawings.

FIG. 1 is a block diagram of a transmitting circuit and a receiving circuit provided in a transmitting / receiving apparatus according to one embodiment of the present invention.

The transmission circuit 11 shown in FIG. 1 includes an insertion circuit 12 for inserting a test signal and a response signal,
A test signal generation circuit 15 for generating a test signal and a response signal generation circuit 14 for generating a response signal are provided.
The receiving circuit 21 includes a test signal detecting circuit 25 for detecting a test signal and a response signal detecting circuit 26 for detecting a response signal. A determination circuit 27 is provided for instructing the signal generation circuit 14 to generate a response signal, notifying that the test signal has been received, and notifying that the response signal has been received when the response signal has been detected.

Next, the operation of the embodiment shown in FIG. 1 will be described.

When this apparatus is on the test side, when a test instruction is given to the test side transmission circuit 11, a test signal is transmitted from the test signal generation circuit 15 and the insertion circuit 12 transmits the test signal.
It is inserted into an unused portion of the main signal input to 1 in the frame format and sent out to the connection line.

When this apparatus is the device under test, the test-side receiving circuit 21 converts the test signal inserted into the unused portion of the frame format of the main signal input from the connection line into a test signal detection circuit 25. The detection circuit 27
In step (1), the reception of the test signal is determined, the reception of the test signal is notified, and a response signal generation instruction is given to the response signal generation circuit 14 of the transmission circuit under test 11. A response signal is transmitted from the response signal generation circuit 14, inserted into an unused portion in the frame format of the main signal input to the transmission circuit under test 11 in the insertion circuit 12, and transmitted to the connection line.

When this apparatus is on the test side, the test side receiving circuit 21 uses the response signal detection circuit 26 to detect the response signal inserted in the unused portion of the frame format of the main signal input from the connection line. Then, the determination circuit 27 notifies the determination circuit 27 of the reception of the response signal.

This series of operations is performed while a test instruction is given. The means for giving a test instruction is realized by a method using a manual switch or a command from an operating system. The notification of the reception of the test signal and the notification of the reception of the response signal are realized by a method of notifying by lighting the light emitting diode or by notifying the operating system.

The main signal input to the transmission circuit 11 and the reception circuit 21 is, for example, an STM
When the -N frame format is applied, unused bytes of the SOH (section overhead) can be used as a portion for inserting a test signal and a response signal. By using the SOH, the test signal and the response signal can be commonly defined on the STM frame format.

FIG. 2 shows a format example of an embodiment in which signals used for the test signal and the response signal are assigned one bit at a time. Here, this is realized by assigning b1 of the unused byte 11 to a test signal and assigning b2 to a response signal. If b1 is "0" when the test is being performed and b1 is "1" when the test is not being performed, b2 is determined by the state transition shown in FIG. In FIG. 3, x is the number of protection steps against a transmission line error.
Takes an integer value of 1, 2,..., N.

FIG. 4 shows an example of a communication system using a transmission / reception apparatus having the transmission circuit and the reception circuit shown in FIG.

The transmitting / receiving device T11 shown in FIG. 4 includes a transmitting circuit S11 and a receiving circuit R11. Also, the transmitting / receiving device T2
1 includes a transmission circuit S21 and a reception circuit R21. The transmission circuit S11 and the reception circuit R21 are connected via a connection line L31, and the transmission circuit S21 and the reception circuit R11 are connected via a connection line L32.

Now, when a test is performed in the transmission / reception device T11, a test instruction is given to the transmission circuit S11, and the transmission circuit S11 inserts a test signal in a frame format and sends it out to the connection line L31. The receiving circuit R21 detects that the test signal is inserted in the frame format received via the connection line L31, thereby notifying that the test signal has been received. The receiving circuit R2
Numeral 1 gives an instruction to issue a response signal to the transmission circuit S21, and the transmission circuit S21 inserts the response signal on the frame format and sends it out to the connection line L32. The receiving circuit R11 notifies that the response signal has been received by detecting the response signal inserted in the frame format received via the connection line L32. As a result, the transmission / reception device T11 of the test example is notified that the response signal has been received, so that the connection lines L31 and L3
2 can be easily confirmed to be correctly connected between the transmission / reception device T11 and the transmission / reception device T21.

[0028]

As described above, according to the present invention, the connection position of the bidirectional connection line connecting the transmitting and receiving apparatuses can be confirmed independently of the transmission path alarm, and the unused area in the frame format can be used. By doing so, testing and confirmation can be performed for the same section as the connection line, and furthermore, bidirectional connection lines and test and confirmation can be performed independently from the test-side transmitting / receiving device. This makes it possible to easily check whether or not the connection line is connected to the position to be connected.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a transmission / reception circuit according to the present invention.

FIG. 2 is a format diagram showing an example of assignment of a test signal and a response signal.

FIG. 3 is a diagram showing an example of state transition of a test signal and a response signal.

FIG. 4 is a configuration diagram of a transmission / reception device including the transmission / reception circuit of the embodiment.

FIG. 5 is a block diagram of a conventional transmitting / receiving apparatus.

FIG. 6 is a configuration diagram of a transmission / reception device including a conventional transmission / reception circuit.

[Explanation of symbols]

REFERENCE SIGNS LIST 11 transmission circuit 12 insertion circuit 13 remote device alarm generation circuit 14 response signal generation circuit 15 test signal generation circuit 21 reception circuit 22 transmission line failure detection circuit 23 transmission line alarm detection circuit 24 alarm processing circuit 25 test signal detection circuit 26 response signal detection Circuit 27 Judgment Circuit S1, S2, S3, S4, S5, S6, S11, S21
Transmission circuit R1, R2, R3, R4, R5, R6, R11, R21
Receiver circuit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04B 3/46 H04B 17/00

Claims (1)

(57) [Claims] A transmitting circuit and a receiving circuit;
That are connected by the transmission and reception device and connected wire, a transceiver for transmitting and receiving signals via the connecting line, in the transmission and reception device means is provided for monitoring the connection state of the connecting line, to the above transmission circuit, Means for instructing generation of a test signal for testing the connection state of the connection line, and STM-N frame format for generating the test signal
Means for inserting the test signal into the unused bytes of the section overhead, means for transmitting the test signal via the connection line, and a response signal for notifying that the test signal has been detected from the receiving circuit by the STM. -N frame format section
And means for transmitting with and inserted into the unused bytes of ® down overhead the test signal, the said reception circuit, coming from the signal received from the connection line and means for detecting the test signal, and detects this test signal the transmission times on the Symbol response signal
Means for transmitting to a road .