JPH06350552A - Transmitter with informing system path testing function between counter devices - Google Patents

Abstract

PURPOSE:To prevent a line from being disconnected by sending information from a self station side transmitter to a counter station side transmitter, judging the possibility of path test execution while the counter station device returns information showing the state of using an object path, and executing a test during using of the path when performing the path test between the transmitters. CONSTITUTION:When test control is executed from a self station transmitter 1 in the case of executing the path test with a counter station side transmitter 3 by performing the test control by the device 1, a path using state collection circuit 13 collects the pertinent testing path of the path test and test informing information from a control part 11, inserts it in a main signal 5 as an SP byte by using an SP/RP byte inserting circuit 7 and sends it to the device 3. The device 3 separates the SP bytes from the received main signal by using a separating circuit 8, and a collection circuit 16 collects the using state of the relevant testing path shown by that SP byte from a control part 12, inserts it to a main signal 6 as an RP byte by using an inserting circuit 10 and sends it to the device 1. The device 1 separates the RP byte from the main signal by using a separating circuit 9, judges the possibility of the path test by using a judge circuit 14 and informs the result to the control part 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital transmission device, and more particularly to a path test of a counter device notification system.

[0002]

2. Description of the Related Art Conventionally, when carrying out a path test between opposing transmission devices, it is necessary to judge whether or not to carry out the path test of the test target path.
A maintenance person used the OW (order wire) or the like between the transmission devices to confirm the state of the test target path by voice.

[0003]

In the above-mentioned conventional test approval / disapproval judgment of a test applicable path, a path test is executed even if the test applicable path is in use due to an error in confirmation or judgment by a maintenance person. There is a possibility of disconnecting the line.

An object of the present invention is to disconnect a line by conducting a path test even if the path under test is in use due to a voice confirmation using a conventional OW or the like or an error in the judgment of a maintenance person. It is an object of the present invention to provide a transmission device with a path test function between inter-device notification systems that can prevent such a situation.

[0005]

According to the present invention, in a transmission device that performs a path test between opposing devices, the corresponding path of the path test designated by the local station transmission device that performs test control and the execution of the path test are opposed. Overhead for notifying the station side transmission device (hereinafter referred to as "SP byte") and overhead for the opposite station side transmission device to respond to the notification from the local station side transmission device with the usage status of the test target path (hereinafter "RP (Hereinafter referred to as "byte"), and a circuit that collects information from the control unit that notifies the test target path of the path test and execution of the path test, and the collected information as an SP byte in the main signal. A circuit to be inserted, a circuit to separate the SP byte from the main signal being received, a circuit to collect from the control unit the usage status of the relevant path in the path test indicated by the separated SP byte, A circuit that inserts information into the main signal as an RP byte, a circuit that separates the RP byte from the main signal that is being received, and a test of the path test indicated by the separated RP byte. And a circuit for notifying the control unit.

[0006]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 2 shows a main signal frame structure used in the present invention. Reference numeral 17 is a frame, 18 is an overhead (for frame synchronization, etc.), 19 is an overhead (SP byte: path test notification byte), 20 is an overhead (RP byte: test applicable path use status notification byte), and 21 is a payload. In this way, the overhead 19 for notifying the main signal frame 17 of the relevant path of the path test designated by the local station side transmission device performing the test control and the execution of the path test
(SP byte) and overhead 2 in which the opposite device responds to the notification from the local station device with the usage status of the test target path.
0 (RP byte) is assigned.

FIG. 1 shows a block diagram between opposed transmission devices. In FIG. 1, a transmission device with a notification function between opposite devices of the present invention is shown, 1 is a transmission device on the own station side, and 3 is a transmission device on the opposite station side.

The local station side transmission device 1 comprises a control unit 11 and an interface unit 2, and the interface unit 2 is an SP.
/ SR byte insertion circuit 7, SP / SR byte separation circuit 9, path test notification / test applicable path use state collection circuit 1
3 and a pass test availability determination circuit 14.

On the other hand, the transmission apparatus 3 on the opposite side is provided with a control unit 12
And an interface unit 4, and the interface unit 4
Has an SP / SR byte insertion circuit 10, an SP / SR byte separation circuit 8, a path test notification / test applicable path use state collection circuit 15, and a path test availability judgment circuit 16.

Next, the operation of the transmission apparatus with the path test function between the opposed apparatuses when the path test is controlled from the local station side will be described. In FIG. 1, when test control is performed from the local station side transmission apparatus 1 and a path test is performed with the opposite station side transmission apparatus 3, when the local station side transmission apparatus 1 performs the test control, The internal path test notification / test applicable path use state collection circuit 13 collects the test applicable path of the path test and the test notification information from the internal control unit 13 of the own station device, and mainly uses the SP / RP byte insertion circuit 7 as an SP byte. It is inserted into the signal 5 and sent to the opposite station side transmission device 3.

In the opposite station side transmission device 3, the SP byte is separated from the received main signal by the SP / SR byte separation circuit 8 and the usage state of the test target path indicated in the separated SP byte is notified to the path test in the opposite device. / Test applicable path use state collection circuit 16 collects data from the control unit 12 in the opposite device and R
As the P byte, the SP / RP byte inserting circuit 10 inserts it into the main signal 6 and sends it to the local station side transmission apparatus 1.

In the local station side transmission apparatus 1, the SP / RP byte separation circuit 9 separates the RP byte from the received main signal, and the path use possibility judgment circuit in the local station apparatus is used to determine the usage status of the test target path shown in the RP byte. 14 collects and judges whether or not the path test can be carried out for the test target path,
To notify.

[0014]

As described above, according to the present invention, when a path test is conducted between opposing transmission devices, the transmission condition of the path under test is transmitted to the transmission device on the opposing station side from the transmission device on the local station side which performs test control. Information to be inquired is inserted in the overhead and sent to the device on the opposite station side, and the device on the opposite station side inserts information on the usage status of the test target path into the overhead device and sends it to the device on the local station side. Whether or not the path test can be performed in the own station device is determined based on the information of the usage status of the device. Therefore, even if the test target path is in use due to the confirmation by voice using the conventional OW or the error of the maintenance person's judgment. Regardless of this, it is possible to prevent the line from being disconnected because the path test is performed.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a transmission device with a path test function between inter-device notification systems according to the present invention.

FIG. 2 is a diagram showing a main signal frame structure used in the present invention.

[Explanation of symbols]

1 Local station side transmission device 2 Local station side transmission device interface unit 3 Opposite station side transmission device 4 Opposition station side transmission device interface unit 5 Main signal (S) 6 Main signal (R) 7 SP / SR byte insertion circuit 8 SP / SR Byte Separation Circuit 9 SP / SR Byte Separation Circuit 10 SP / SR Byte Insertion Circuit 11 Local Station Control Unit 12 Opposed Device Control Unit 13 Local Station Device Path Test Notification / Test Applicable Path Usage Status Collection Circuit 14 Local Station In-apparatus path test availability judgment circuit 15 Opposite station equipment path test notification / test applicable path usage status collection circuit 16 Opposed station equipment path test availability judgment circuit

Claims (2)

[Claims] 1. In a transmission device that performs a path test between opposing devices, an overhead for notifying the opposite station side transmission device of the path of the path test designated by the local station side transmission device performing test control and the execution of the path test. (SP byte) and the overhead signal (RP byte) in which the opposite station side transmission device responds to the notification from the local station side transmission device with the usage status of the test target path is used, and a path test is performed. Circuit that collects the information notifying the execution of the path and the path test from the control unit, a circuit that inserts the collected information into the main signal as an SP byte, and a circuit that separates the SP byte from the received main signal. And a circuit that collects from the control unit the usage status of the relevant path in the path test indicated by the separated SP byte, and a circuit that inserts the collected information into the main signal as the RP byte. It has a circuit for separating the RP byte from the main signal, and a circuit for judging whether or not the path test can be carried out according to the usage state of the test path of the path test indicated by the separated RP byte and notifying the control section. A transmission device with a path test function, which is a notification method between opposite devices. 2. In the local station side transmission device for performing the test control, the local station device internal collecting circuit collects the test target path of the path test and the test notification information from the local station device internal control section, and outputs the SP byte as an SP byte. The byte insertion circuit inserts it into the main signal and sends it to the opposite station side transmission device. At the opposite station side transmission device, the SP byte separation circuit separates the SP bytes from the received main signal, and the test shown in the separated SP bytes is shown. The collection circuit in the opposite device collects the usage status of the corresponding path from the control unit in the opposite device, inserts it into the main signal as the RP byte by the RP byte insertion circuit, sends it to the local station transmission device, and transmits it to the local station side. In the equipment, the RP byte is separated from the received main signal by the RP byte separation circuit, and the usage status of the test applicable path indicated in the RP byte is collected by the path test execution availability judgment circuit in the own station apparatus and the test applicable path is collected. Performs path test implementation capability determination, notifies the local station apparatus control unit, facing the inter-device notification type path test function transmission apparatus according to claim 1, wherein a.