JPH04373224A - Transfer system for switching control information - Google Patents

Abstract

PURPOSE:To reduce the time from the switching start to its end and to expand other job processing in a control sub equipment by decreasing transfer processing of a switching controlled information teregraphic among a control sub equipment, an optical input sub equipment, a cross connect sub equipment and an optical output sub equipment. CONSTITUTION:An optical input sub equipment is provided with an information telegraphic message inset section 71, a cross connect subs equipment is provided with an information teregraphic message read section 73 and an information telegraphic insert section 72, and an optical output sub equipment is provided with an information telegraphic read section 74. Then a switching setting information telegraphic a switching enable information telegraphic and a switching execution text are transmission each once between the control sub equipment and the other sub equipments.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transferring switching control information in a synchronous optical signal network cross-connect device, which constitutes one end of an optical signal transmission network system.

0002

2. Description of the Related Art Conventionally, a synchronous optical signal network cross-connect device transfers switching control information in a format as explained with reference to FIGS. 3 and 4.

The synchronous optical signal network cross-connect device shown in FIG. (hereinafter abbreviated as optical output sub-device) 4, and includes the three types of sub-devices 2, 3,
The cross-connect device control sub-device (hereinafter referred to as the control sub-device) 1 that controls the switching control information transfer communication path (hereinafter referred to as the communication path) 51,
52 and 53.

In the synchronous optical signal network cross-connect device having such a configuration, first, the control sub-device 1 and the optical input sub-device 2 are connected via a communication path 51 from the sub-device 1 to the sub-device. The switching setting information message is transferred to the device 2 (101).

[0005] In response to this, a switching enable information message is transferred from the sub-device 2 to the sub-device 1, informing that the switch within the own device can be set (10
2).

[0006] In response to the transfer of the switchable information message, the sub device 1 transfers a switching execution message instructing the sub device 2 to execute switch settings (107).

That is, the switching control information message is transferred between sub-device 1 and sub-device 2 three times.

Similarly, a communication path 52 is established between the control sub-device 1 and the cross-connect sub-device 3 via a communication path 53, and a communication path 52 is established between the control sub-device 1 and the optical output sub-device 4. Transfer of the switching control information telegram is performed through the communication terminal.

That is, in the switching control information transfer method within the synchronous optical signal network cross-connect device, switching information telegrams are transferred a total of nine times between the control sub-device 1 and the three types of sub-devices. (Figure 4
reference).

0010

[Problem to be Solved by the Invention] When the above-mentioned switching control information transfer method in the synchronous optical signal network cross-connect device is adopted, the communication path is used to connect the control sub-device, the optical input sub-device, and the cross-connect sub-device. , an optical output sub-device, and other sub-devices, there are many transfer processes of switching control information telegrams, and there is a drawback that it takes time from the start to the end of switching.

Furthermore, since the control sub-device processes a large number of switching control information messages, it also has the disadvantage of interfering with the processing of other tasks within the control sub-device.

0012

[Means for Solving the Problems] According to the present invention, an optical input sub-device includes an overhead of a synchronous optical signal (main signal).
The cross-connect sub-device has an information message insertion part that adds a switching setting information message, a switching enable information message of its own device, and a switching execution message, and the cross-connect sub device adds the switching setting information message from the overhead of the main signal.
The optical output sub-device has an information telegram reading unit that retrieves the switching execution telegram, and an information telegram insertion unit that adds the switchable information telegram of its own device to the overhead of the main signal. It has an information telegram reading unit that reads out the telegram, the switching enable information telegram of its own device, and the switching execution telegram, thereby providing a switching control information transfer method that can transfer control information.

Furthermore, in the present invention, the above three types of sub-devices and the control sub-device are connected through communication channels for information transfer, and an information telegram indicating that switching is possible is received from each sub-device. The control sub-device has means for instructing each sub-device to perform switch settings.

[0014]

[Example] Next, the present invention will be explained with reference to the drawings. FIG. 1 is a conceptual diagram of an apparatus using the present invention. The control sub-device 1 connects an optical input sub-device 2, a cross-connect sub-device 3, and an optical output sub-device 4 through communication paths 51, 53, and 52.
And switching control information can be transferred.

The optical input sub-device 2 has an information telegram insertion unit 71 for adding a switching control information telegram to the overhead of the main signal, and the cross-connect sub-device 3 extracts the switching control information from the overhead of the main signal. It has an information telegram reading section 73 for reading the telegram, and an information telegram insertion section 72 for adding the switching control information telegram to the overhead of the main signal. It has an information telegram reading section 74 for reading control information telegrams.

The optical input signal 61 is input to the optical input sub-device 2, passes through the main signal transfer path 81, the cross-connect sub-device 3, the main signal transfer path 82, and the optical output sub-device 4.
It is output as an optical output signal 62. At this time, the optical input signal 6
A part of the overhead added to the optical input sub-device 2 is processed by the optical input sub-device 2, and is not used inside the device until it is newly added to the optical output sub-device 4.

FIG. 2 shows an example of an implementation procedure of the present switching information message transfer method. The implementation procedure of this transfer method will be explained with reference to FIGS. 2 and 1. First, the control sub-device 1 sends a switching setting information telegram to the optical input sub-device 2 using the communication path 51 (91 ).

The optical input sub-device 2 adds the received switching information to the overhead part of the main signal, sends it to the cross-connect sub-device 3 using the main signal transfer path 81 (92), and furthermore, the optical input sub-device 2 It is determined whether switching is possible or not, and a switchable information telegram is added to the main signal overhead and sent to the cross-connect sub-device 3 (9
4).

The cross-connect sub-device 3 reads the switching setting information telegram (92) from the main signal transferred via the main signal transfer path 81, and transfers the main signal including overhead using the main signal transfer path 82. It is sent to the optical output sub-device 4 (93).

At this time, the cross-connect sub-device 3:
Determine whether or not the own device is capable of switching, add a switchable information message to the overhead of the main signal,
It is sent to the optical output sub-device 4 using the main signal transfer path 82 (9
5).

The optical output sub-device 4 reads the switching setting information telegram (93) from the main signal transferred through the main signal transfer path 82, and re-adds a new overhead of the main signal.

Furthermore, it is determined whether or not the own device is capable of switching, and if switching is possible, the optical output sub-device 4 transmits the switchable information telegram to the optical input sub-device 2 and the cross-connect sub-device 3. It is transferred to the control sub-device 1 along with the switching-enabled information telegram using the communication path 52 (96).

The control sub-device 1 receives the switchable information telegram (96) from the optical output sub-device 4, and if all the sub-devices are switchable, transmits the switching execution telegram to the optical input sub-device 2. The data is transmitted using route 51 (97).

[0024] Below, the switching execution message (97) is as follows:
The switching instruction is transmitted to the cross-connect sub-device 3 and the optical output sub-device 4 using the overhead of the main signal (98, 99), and switching is executed.

[0025]

As explained above, according to the switching information transfer method according to the present invention, the switching information message transfer between the control sub-device and other sub-devices at the time of switching is the switching setting information message transfer 1. Since it only requires three times in total: one transfer of the switchable information message, and one transfer of the switching execution message, the time from the start to the end of switching can be shortened compared to the conventional method.

Furthermore, since the amount of switching control information telegrams processed by the control sub-device can be reduced, other tasks that can be processed within the device can be expanded.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram of a device using a switching control information transfer method of a synchronous optical signal network cross-connect device of the present invention.

FIG. 2 is a diagram showing an example of an implementation procedure of a switching control information transfer method of the synchronous optical signal network cross-connect device of the present invention.

FIG. 3 is a conceptual diagram of a conventional synchronous optical signal network cross-connect device using a switching control information transfer method.

4 is a diagram illustrating an example of an implementation procedure of a switching control information transfer method of the synchronous optical signal network cross-connect device of FIG. 3; FIG.

Claims (2)

[Claims] 1. A synchronous optical signal input sub-device that receives a synchronous optical signal as a main signal and performs optical/electrical signal conversion;
A synchronous optical signal output sub-device that performs electrical/optical signal conversion, the synchronous optical signal input sub-device, and the synchronous optical signal output sub-device are located between the Switching control information in a synchronous optical signal network cross-connect device constituted by a cross-connect sub-device that outputs a signal to any terminal of a plurality of output terminals, and a cross-connect device control sub-device that controls the three sub-devices. In the transfer method, the synchronous optical signal input sub-device, the synchronous optical signal output sub-device, and the cross-connect sub-device are each connected to the cross-connect device control sub-device through a communication path for transferring a control message. A switching control information transfer system characterized in that the four sub-devices transmit and receive control messages using the overhead of a main signal and connect to each other. 2. The synchronous optical signal input sub-device adds a switching setting information telegram, a switching enable information telegram of the own device, and a switching execution telegram as the control telegram to the overhead of the main signal (synchronous optical signal). The synchronous optical signal output sub-device reads the switching setting information telegram, the switching enable information telegram of the own device, and the switching execution telegram from the overhead of the transferred main signal. The cross-connect sub-device includes an information telegram reader, and the cross-connect sub-device reads a switching setting information telegram from the overhead of the main signal;
2. The switching control information transfer method according to claim 1, further comprising an information telegram reading section for reading the switching execution telegram, and an information telegram insertion section for adding the switchable information telegram of the own device to the overhead of the main signal.