JPH08242284A - Network management device - Google Patents

Abstract

PURPOSE: To properly send the management information even when the number of signal routes to be inputted to a cross connect device differs from the number of signal routes to be outputted. CONSTITUTION: A 1:2 optical signal processing part. 46 is provided with the 1st to 3rd optical signal terminal parts 71-73 and which terminates signal routes 14-16. The management information extracted by the 1st-3rd optical signal terminal parts 71-73 is inputted to a management information distribution processing part 76. The part 76 selects the destination of sending the management information to either of the 1st or 2nd management information route processing part 43 or 44 based on a service information correspondence table 77. As the output destination of the management information is switched by the part 76, the management information can be properly transmitted between the three-system signal routes 14-16 and the 2-system signal routes 53 and 54.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network management apparatus for managing a network for transmitting an optical signal, and more particularly to various networks for managing the network by utilizing an overhead portion when the optical signal is framed. The present invention relates to a network management device that transmits information.

[0002]

2. Description of the Related Art Optical signals are transmitted via a network between terminal stations located in various places. The network has a switching function for transmitting an optical signal and switching the transmission destination. When the network is a large-scale network covering the whole of Japan, for example, if the management is carried out in a distributed manner in each region, failure detection and recovery work cannot be carried out efficiently. Therefore, it is common practice to centrally manage the network at one location. Therefore, in addition to the original information to be transmitted, various information for managing the network is transmitted in the network. Usually, such management information is transmitted by utilizing the overhead part of the frame.

FIG. 4 shows the configuration of a conventionally used network. The network includes first to third cross-connect devices 101 to 1 for switching transfer destinations of optical signals.
It has 03. Two signal paths, an active system and a standby system, are connected between each cross-connect device. Of these, a signal path 104 and a signal path 105 are arranged between the first cross-connect device 101 and the second cross-connect device 102. A signal path 106 and a signal path 107 are arranged between the second cross-connect device 102 and the third cross-connect device 103. Similarly, a signal path 108 and a signal path 109 are arranged between the third cross-connect device 103 and the first cross-connect device 101.

In the first cross-connect device 101, a supervisory control device 111 for managing the network is provided in the signal path 11
2 and the signal path 113. A first optical signal terminating device 116 is connected to the second cross-connect device 102 through a signal path 114 and a signal path 115. In addition, the second cross-connect device 102
A second optical signal terminating device 119 is connected to the signal line 117 and the signal line 118 via the signal line 117 and the signal line 118, respectively. The optical signal terminating device is a device for terminating a transmitted optical signal. Similarly, in the third cross-connect device 103,
Third optical signal terminating device 121 and fourth optical signal terminating device 1
22 are connected through signal paths 123 and 124 and signal paths 125 and 126, respectively. For example, when transmitting some management information from the supervisory control device 111 to the fourth optical signal terminating device, the first cross-connect device 101 and the third cross-connect device 103 are routed.

FIG. 5 shows the configuration of the first cross-connect device. The first and second pair monitoring device communication units 131 and 132 are provided with signal paths 112 and 113, respectively.
Through the monitor control device 111 shown in FIG. First and second pair monitoring device communication units 131, 13
Reference numeral 2 is a circuit for interfacing with the monitor control device 111. First pair monitoring device communication unit 131
Is connected to the first management information path processing unit 133. The second monitoring device communication section 132 is connected to the second management information path processing section 134. The management information route processing units 133 and 134 are units that determine the destination of the management information transmitted from the monitoring control device and determine the route of the destination of the management information. Both the first and second management information path processing units 133 and 134 are connected to the management information processing unit 135. The management information processing section is a section for analyzing the content of the management information and performing a process corresponding to the management information when the received management information is addressed to itself.

The first to fourth one-to-one optical signal processing units 136-
Reference numeral 139 is a circuit device for terminating and sending an optical signal. The first one-to-one optical signal processing unit 136 includes
The signal paths 104 and 105 shown in are connected. The signal paths 108 and 109 shown in FIG. 4 are connected to the second one-to-one optical signal processing section 137, respectively. Also,
The third and fourth one-to-one optical signal processing units 138 and 139 are respectively connected to opposing devices not shown in FIG. The first to fourth one-to-one optical signal processings 136 to 139 are the first and second management information path processing units 133 and 1, respectively.
It is connected to 34. In addition, the first to fourth one-to-one optical signal processing units 136 to 139 are the cross-connect processing units 141.
Are connected to each other via. The cross-connect processing unit 141 is a unit for exchanging optical signals.
This is a part for inputting the optical signal input from the third one-to-one optical signal processing unit 138 to another one-to-one optical signal processing unit according to its destination.

The management information sent through the first communication device 131 for monitoring device is the first management information path processing unit 13.
In 3 the destination is determined. When the destination is the own station, the received management information is passed to the management information processing unit 135. When the destination is, for example, the second cross-connect device 102, the first management information path processing unit 133 delivers the received management information to the first one-to-one optical signal processing unit 136. First
The one-to-one optical signal processing unit 136 sends the management information through the signal path 104.

FIG. 6 shows a configuration of the one-to-one optical signal processing section and a connection state with peripheral circuits. Figure 5
The same circuit parts as those of the above are given the same reference numerals, and the description thereof will be appropriately omitted. The first one-to-one optical signal processing unit,
A first optical signal terminating unit 151 connected to the signal path 104 and terminating an optical signal, and a second optical signal terminal unit 151 connected to the signal path 105.
The optical signal terminating unit 152 of FIG. Optical signal terminal 1
Reference numerals 51 and 152 extract the management information portion from the overhead portion of the framed optical signal. The first and second optical signal termination units 151 and 152 are connected to the switching processing unit 153, respectively. Switching processing unit 1
53 is the first and second optical signal termination units 151, 152.
It is a circuit portion that selectively outputs any one of the signals input from. The switching processing unit 153 is connected to the path frame processing unit 154. The pal frame processing unit 154 is a circuit unit that decomposes a frame and extracts path information. Then, the removed data portion such as the overhead portion is passed to the cross-connect processing unit 141.

The internal structure of the second 1: 1 optical signal processing section 137 is the same as that of the first 1: 1 optical signal processing section 136.
The description is omitted. First one-to-one optical signal processing unit 136
First optical signal terminating unit 151 and second optical signal processing unit 1
The first optical signal termination unit 156 of 37 is both connected to the first management information path processing unit 133. Similarly, the second optical signal termination sections 152 and 156 in the first and second optical signal processing sections 136 and 137 are both connected to the second management method path processing section 134. In this way, each optical terminal unit is connected to the management information path processing unit corresponding to each one.

When the management information is sent through the signal path 104, the information is taken out by the first optical signal terminal unit 151. Then, the extracted management information is sent to the first management information path processing unit 133 connected thereto. The first management information path processing unit 133 determines the destination of the received management information. If the destination is, for example, the third cross-connect device 103, the first management information path processing unit 133 delivers the management information to the first optical signal terminating unit 155 in the second optical signal processing unit 137. . Then, the management information is transmitted to the third cross-connect device 103 through the signal path 108. Meanwhile, the second
The management information transmitted through the optical signal terminating units 152 and 156 is fixedly processed by the second management information path processing unit 134. In this way, which of the first and second management information termination processing units 133 and 134 is used is
It is fixedly determined by these connections.

In addition to this, Japanese Patent Laid-Open No. 63-314044 discloses a network management device which collectively allocates destination information for designating a signal route in a network at a network management center. By centrally managing the occurrence of failures in this device, the optimal route for transmitting information is selected from the perspective of the entire network.

Further, Japanese Patent Application Laid-Open No. 2-143746 discloses a network management device in which the amount of information to be stored for setting a route in each node is reduced. In this device, each node extracts and loads only the information required when transmitting data to another node. Therefore, it is not necessary to always store all the route information, and it is possible to reduce the route information to be stored in each node.

[0013]

In the conventionally used network management apparatus, each optical signal terminating unit and management information path processing unit are fixedly connected to each other in a one-to-one relationship. Even in the case where the management information route processing unit is fixedly assigned to each route in this way, if the number of routes connecting between the cross-connect devices and the optical signal terminating device match each other, the management information Can be properly transferred. However, if the number of paths differs between the cross-connect devices or between the optical signal termination devices, the optical signal termination unit and the management information route processing unit cannot be fixedly connected in a one-to-one relationship. For example, if there are three signal paths that are input to the cross-connect device and there are only two signal paths that are output to the optical signal terminating device, one input-side system will be left over. Therefore, there is a problem that the management information transmitted through the surplus route cannot be transferred to the optical signal terminal device. In the network management devices disclosed in Japanese Patent Application Laid-Open No. 63-314044 and Japanese Patent Application Laid-Open No. 2-143746, signal paths are also switched. Therefore, if the number of paths differs between devices, the management information is appropriate. The problem of not being able to transmit to the same is occurring.

Therefore, an object of the present invention is to provide a network management apparatus capable of appropriately transferring management information even when the number of signal paths input to the cross-connect apparatus is different from the number of output signal paths. To do.

[0015]

According to a first aspect of the present invention, a transfer destination of predetermined management information included in a signal transmitted from a plurality of partner stations connected by an arbitrary number of transmission paths is set to the transfer destination. A predetermined number of prepared management information destination selecting means for selecting from the plurality of partner stations based on the attached destination information, and a partner connected by a number of transmission lines equal to the number of the management information destination selecting means. One-to-one management information extraction for extracting predetermined management information from the transmitted signal which is provided for each station for each transmission path and is fixedly connected in one-to-one correspondence with the management information destination selecting means. Means and management information extraction means for extracting predetermined management information from the signals sent to and provided from each of the partner stations connected by a number of transmission paths different from the number of management information destination selection means. And a predetermined management information is extracted by any one of the management information extraction means corresponding to the other station, which is provided for each partner station connected by a number of transmission lines different from the number of the management information destination selection means. The network management device is provided with a selection means for selecting a management information destination selection means for determining the transfer destination.

That is, according to the first aspect of the invention, the management information extracting means and the management information destination selecting means are set to 1 for the partner station having the same number of management information destination selecting means and the same number of transmission paths.
They are fixedly connected in a one-to-one correspondence. Then, for the partner station whose number of transmission paths does not match the number of management information destination selecting means, the management information destination selecting means used for discriminating the transfer destination of the management information is selected. Thus, even if the number of transmission paths on the input side of the management information does not match the number of the management information destination selecting means, the transfer destination of the management information can be discriminated by any of the management information destination selecting means.

According to the second aspect of the present invention, the transfer destination of the predetermined management information included in the signals sent from the plurality of partner stations connected by the arbitrary number of transmission lines is set as the destination information attached thereto. A predetermined number of management information destination selecting means for selecting from a plurality of these partner stations based on the
For a partner station connected by the same number of transmission lines as the number of the management information destination selecting means, a predetermined number is provided for each transmission line and fixedly connected in one-to-one correspondence with the management information destination selecting means. Predetermined management information is provided for each transmission path of the counterpart station connected by one-to-one management information transmitting means for transmitting the management information to the other station and the number of transmission paths different from the number of the management information destination selecting means. Is provided for each partner station connected by a number of transmission paths different from the number of management information destination selecting means and management information transmitting means for transmitting the management information to the partner station. When it is determined that there is a network management means for selecting the management information sending means used for sending the management information from the management information sending means provided for the partner station It is not provided in the location.

That is, according to the second aspect of the present invention, the management information sending means and the management information destination selecting means are made to correspond one-to-one with respect to the partner station having the same number of management information destination selecting means and the same number of transmission paths. Fixedly connected. Then, for the partner station whose number of transmission paths does not match the number of management information destination selecting means, the management information transmitting means used for transmitting the management information is selected. Thereby, even if the number of transmission paths on the transmission side of the management information and the number of the management information destination selecting means are different, the management information can be transferred using any one of the management information transmitting means.

According to a third aspect of the invention, the selecting means stores the management information extracting means and the management information destination selecting means to be used for determining the transfer destination of the management information extracted by the management information in advance in association with each other. A table is provided, and the management information destination selecting means is selected based on the table.

That is, according to the third aspect of the invention, the management information destination selecting means is selected based on the routing table in which the management information extracting means and the management information destination selecting means to be selected are stored in association with each other. .

According to another aspect of the invention, the selecting means includes a routing table in which the management information destination selecting means and the management information sending means to be selected are associated with each other in advance and are stored. It is designed to select the means.

That is, in the invention described in claim 4, the management information sending means is selected based on the routing table in which the management information destination selecting means and the management information sending means to be selected are stored in association with each other.

According to the invention of claim 5, the number of the management information destination selecting means coincides with the minimum number of transmission paths provided between the other station and the other station.

According to the invention of claim 6, the transmission line is an optical synchronous transmission line for transmitting a framed optical signal, and a plurality of transmission lines are provided between each partner station in order to have a redundant configuration. , The management information is transmitted by including it in the overhead of the frame of the optical signal, and the optical signal from which the management information is removed by the management information extracting means is transmitted to the destination station of the transfer destination through the cross-connect device for switching the transfer destination. It is supposed to be done.

That is, according to the invention of claim 6, the transmission line is an optical synchronous transmission line for transmitting a framed optical signal, and a plurality of transmission lines are provided between each partner station in order to have a redundant configuration. There is. Further, the management information is transmitted by including it in the overhead of the frame of the optical signal, and the optical signal from which the management information is removed by the management information extracting means is transmitted to the destination station of the transfer destination through the cross connect device for switching the transfer destination. To be done.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments.

FIG. 1 shows the configuration of the entire network using a network management device according to an embodiment of the present invention. The network includes first to third cross connect devices 11 to 13 for switching the transfer destination of the optical signal. Two working systems and one standby system signal paths are connected between each cross-connect device. Among these, the first to third signal paths 14 to 16 are arranged between the first cross-connect device 11 and the second cross-connect device 12.
Fourth to sixth signal paths 17 to 19 are arranged between the second cross-connect device 12 and the third cross-connect device 13. Similarly, the third cross-connect device 13
The seventh to ninth signal paths 21 to 23 are provided between the first cross connect device 11 and the first cross connect device 11.

In the first cross-connect device 11, a supervisory control device 24 for managing the network is provided with signal paths 25, 2.
It is connected via 6. A first optical signal terminating device 29 is connected to the second cross-connect device 12 through signal paths 27 and 28, and a second optical signal terminating device 33 is connected through signal paths 31 and 32, respectively. Similarly third
The third optical signal terminating device 34 and the fourth optical signal terminating device 35 are respectively connected to
6, 37 and signal paths 38, 39. Thus, three signal paths are connected between the cross-connect devices 11 to 13, respectively, but two signal paths are connected between the cross-connect device and the optical signal terminating device or the supervisory control device. ing.

FIG. 2 shows the outline of the configuration of the first cross-connect device. The first and second monitoring device communication units 41 and 42 are connected to the monitoring control device 24 through signal paths 26 and 27, respectively. The first monitoring device communication unit 41 includes a first management information path processing unit 43,
The second pair monitoring device communication unit 42 is connected to the second management information path processing unit 44, respectively. Also the first and second
The management information path processing units 43 and 44 are both connected to the management information processing unit 45.

First and second one-to-two optical signal processing section 4
6 and 47 have three signal paths 14 to 16, respectively.
21 to 23 are input. First and second one-to-one
Two signal paths 53, 54 and signal paths 55, 56 are connected to the optical signal processing units 51, 52, respectively. These first and second one-to-two optical signal processing units 46 and 47
The first and second one-to-one optical signal processing units 51 and 52 are connected to each other via the cross-connect processing unit 57. The first and second one-to-one optical signal processing units 51 and 52 and the first and second one-to-two optical signal processing units 46 and 47 each have two management signal paths for transmitting management information. It is connected. Among them, the first management signal paths 61 to 6
4 are respectively connected to the first management information path processing unit 43. The second management signal paths 65 to 68 are connected to the second management information path processing unit 44, respectively. Further, the first and second one-to-two optical signal processing units 46 and 47 are
Each is connected to the management information processing unit 45. Although the first and second one-to-two optical signal processing units 46 and 47 respectively receive three system signal paths, only two system management signal paths are input and output.

FIG. 3 shows the configuration of the first 1-to-2 optical signal processing unit and the first 1-to-1 optical signal processing unit shown in FIG. 2 and the connection state of these peripheral circuits. . The same circuit portions as those in FIG. 2 are denoted by the same reference numerals, and the description thereof will be omitted as appropriate. First 1-to-2 optical signal processing unit 46
Includes first to third optical signal termination units 71 to 73. These are connected to the switching processing unit 74. The switching processing unit 74 is a selection circuit that selectively connects any one of these three optical signal termination units 71 to 73 to the path frame processing unit 75. The path frame processing unit 75 is a circuit that decomposes a frame, extracts path information, and the like, and converts the frame information into a data format that can be handled by the cross-connect processing unit 57. The removed data part such as the overhead part in the frame is the cross-connect processing part 5.
7 is input. The cross-connect processing unit 57 is a circuit that switches the data transfer destination, and supplies the optical signal input from the first 1-to-2 optical signal processing unit 46 to the first 1-to-1 optical signal processing unit 51, for example. Do things.

The first to third optical signal termination units 71 to 73
Has a function of extracting the management information included in the overhead portion of each frame. The extracted management information is input to the management information distribution processing unit 76. The management information input to the management information distribution processing unit 76 is collected and input to the service information correspondence table 77. The management information distribution processing unit 76 includes the first to third optical signal terminal units 71 to 7
The management information 78 _{1 to} 78 ₃ of 3 systems input from ₃
This is a circuit portion that switches to which of the first and second management information path processing units 43 and 44 the data is output. The service information correspondence table 77 is a matrix-like table in which the management information route processing units to be selected are registered with the content of the management information and the destination as the transfer destination thereof as parameters. By referring to this, it is determined which of the first and second management information path processes 43 and 44 the received management information should be sent to.

The first one-to-one optical signal processing section 51 includes fourth and fifth optical signal terminating sections, a switching processing section 83, and a path frame processing section 84. The fourth optical signal terminal 81 is fixedly connected to the first management information path processor 43. The fifth optical signal terminating unit 82 is fixedly connected to the second management information path processing unit 44.

Next, the operation of the cross-connect device when the management information sent from the monitor control device 11 is transferred will be described.

In FIG. 2, it is assumed that the management information from the monitor controller 11 is sent through the signal path 26. The management information is received by the first pair monitoring device communication unit 41 connected to the signal path 26. Then, the received management information is fixedly transferred to the first management information path processing unit 43. The first management information path processing unit 43 determines the transfer destination based on the destination information attached to the management information. When the destination is the own station, the received management information is delivered to the management information processing unit 45. When the destination is, for example, the second cross-connect device 12, the first management information path processing unit transfers the management information to the first 1 to 2 optical signal processing unit 46 via the path 63.

The management information sent from the first management information path processing unit 43 is once input to the management information distribution processing unit 76 as shown in FIG. Service information correspondence table 7
In 7, the optimum signal path is registered in advance according to the content of the processing indicated by the management information. Then, which path of the first to third optical signal terminators 71 to 73 should be used is selected based on the service information correspondence table 77. Here, it is assumed that the second optical signal terminal unit 72 is selected.
The management information input from the first management information path processing unit 43 is input to the selected second optical signal terminating unit 72.
The second optical signal terminating unit 72 performs processing for adding management information to the overhead portion of the frame. Then, the management information is transmitted to the second cross-connect device 12 through the signal path 15.
Sent to

Next, the operation when the three signal paths are cross-connected to the two signal paths will be described.

It is assumed that the management information has been transmitted through the signal path 14 shown in FIG. Then, it is assumed that the transfer destination is an opposite device connected to the first one-to-one optical signal processing unit 51. The frame input from the signal path 14 is received by the first optical signal terminal unit 71. The first optical signal terminating unit 71 extracts the management information from the overhead portion of the received frame and inputs it to the management information distribution processing unit 76 via the path 78 ₁ . The management information is sent to the service information correspondence table via the management information distribution processing unit 76. Here, the transfer destination of the management information is determined based on the destination information. When the destination of the management information is its own station, that is, the first cross-connect device 11, the service information correspondence table 77 has the first optical signal terminating unit 71.
The management information received by is delivered to the management information processing unit 45. Then, the management information processing unit 45 performs processing according to the content indicated by the management information.

When the destination of the management information is not the own station, the management information route processing section corresponding to the destination information is selected based on the service information correspondence table 77. Second by destination
If the management information termination processing unit 44 is selected,
The management information distribution processing unit 76 routes the received management information to the route 6
7 to the second management information path processing unit 44.
The second management information path processing unit 44 determines that the first one-to-one optical signal processing unit 51 is the transfer destination based on the destination information attached to the input management information. Then, the management information from the first 1 to 2 optical signal processing unit 46 is transferred to the first 1 to 1
The signal is input to the fifth optical signal terminal unit 82 in the optical signal processing unit 51. The fifth optical signal terminating unit 82 performs a process of adding management information to the overhead portion. After that, the frame is transferred to the opposite device through the signal path 54. Assuming that the device connected to the other end of the signal path 54 is the optical signal terminating device, a response to the sent management information is returned. In this case, the response is transmitted to the monitor control device 24 through the route opposite to the management information.

As described above, by providing the management information distribution processing unit 76, the management information transmitted by the three signal paths is distributed to either of the two management information path processing units. Therefore, even if the number of signal paths is different,
The management information can be transferred appropriately.

[0041]

As described above, according to the first aspect of the invention, with respect to the partner station having the same number of management information destination selecting means and the same number of transmission lines, the management information extracting means and the management information destination selecting means. Are fixedly connected in a one-to-one correspondence. Then, for the partner station whose number of transmission paths does not match the number of management information destination selecting means, the management information destination selecting means used for discriminating the transfer destination of the management information is selected. Accordingly, even if the number of transmission paths on the input side of the management information does not match the number of the management information destination selecting means, the transfer destination of the management information can be discriminated by any of the destination selecting means. For example, when the number of transfer paths of the transfer source is larger than that of the transfer destination, the management information destination selecting means is prepared by the number of transfer paths of the transfer destination. Thus, even when the number of transmission lines between the input and output is different, by selecting the management information destination selecting means, it is possible to transfer the management information to the partner station having a different number of transmission lines.

According to the second aspect of the present invention, the management information sending means and the management information destination selecting means have a one-to-one correspondence with respect to the partner station having the same number of management information destination selecting means and the same number of transmission paths. Correspondingly fixedly connected. Then, for the partner station whose number of transmission paths does not match the number of management information destination selecting means, the management information transmitting means used for transmitting the management information is selected. Thereby, even if the number of transmission paths on the transmission side of the management information and the number of the management information destination selecting means are different, the management information can be transferred using any one of the management information transmitting means.

According to the third aspect of the invention, the management information destination selecting means is selected based on the routing table in which the management information extracting means and the management information destination selecting means to be selected are stored in association with each other. . This makes it possible to easily select the management information extracting means. Further, the management information destination selecting means to be used can be easily changed only by changing the registered contents of the routing table.

According to the fourth aspect of the invention, the management information sending means is selected based on the routing table in which the management information destination selecting means and the management information sending means to be selected are stored in association with each other. . As a result, it is possible to easily select the management information sending means used for sending the management information for which the transfer destination is determined.

Further, according to the invention of claim 5, the number of the management information destination selecting means coincides with the number of the smallest transmission paths. As a result, the management information destination selecting means only needs to be selected for the partner station having a large number of transmission lines, so that the configuration of the network management device can be simplified.

According to the invention described in claim 6, the management information can be transferred even when the number of redundant transmission lines is different. Further, the signal is an optical signal, so that the transmission quality is high. Further, since the management information is transmitted by including it in the overhead of the frame of the optical signal, the transmission efficiency does not decrease because the management information is transmitted. Further, the optical signal from which the management information is removed is transmitted to the partner station of the transfer destination via the cross-connect device for switching the transfer destination, and can be transmitted on a path independent of the management information.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of a network using a network management device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of a cross-connect device used in the network management device in one embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a first 1-to-2 optical signal processing section and a first 1-to-1 optical signal processing section shown in FIG. 2 and a connection state between the first 1-to-2 optical signal processing section and peripheral circuits thereof. .

FIG. 4 is an explanatory diagram showing the configuration of a network in which the number of signal paths between the devices used in the past is the same.

FIG. 5 is a block diagram showing a configuration of a cross-connect device that has been conventionally used.

FIG. 6 is a block diagram showing a configuration of a conventionally used one-to-one optical signal processing unit and a connection state with peripheral circuits.

[Explanation of symbols]

11-13 Cross-connect device 14-23, 25-28, 31, 32, 36-39 Signal path 24 Monitoring control device 29, 33-35 Optical signal terminating device 41, 42 Pair monitoring device communication unit 43, 44 Management information path Processing unit 45 Management information processing unit 46, 47 1 to 2 optical signal processing unit 51, 52 1 to 1 optical signal processing unit 57 Cross connect processing unit 76 Management information distribution processing unit 77 Service information correspondence table

Claims (6)

[Claims] 1. A transfer destination of predetermined management information included in a signal sent from a plurality of partner stations respectively connected by an arbitrary number of transmission paths, based on destination information attached to the transfer destination of the predetermined management information. A predetermined number of prepared management information destination selecting means to be selected from the partner stations, and the management information provided for each of the partner stations connected by the same number of transmission paths as the management information destination selecting means. Number of 1: 1 management information extraction means for extracting the predetermined management information from the transmitted signals fixedly connected to the destination selection means in a one-to-one correspondence, and the number of the management information destination selection means Management information extracting means for extracting the predetermined management information from the signals sent and provided for each transmission path with respect to the partner station connected by a different number of transmission paths; It is provided for each partner station connected by a number of transmission lines different from the number of selecting means, and when any one of the management information extracting means corresponding to the partner station extracts the predetermined management information, the transfer destination is determined. Selecting means for selecting management information destination selecting means for controlling the network management apparatus. 2. A transfer destination of predetermined management information included in a signal sent from a plurality of partner stations respectively connected by an arbitrary number of transmission paths, based on destination information attached to the transfer destination of the predetermined management information. A predetermined number of prepared management information destination selecting means to be selected from the partner stations, and the management information provided for each of the partner stations connected by the same number of transmission paths as the management information destination selecting means. A one-to-one management information sending means for sending the predetermined management information fixedly connected to the destination selecting means in a one-to-one correspondence to the other station, and a number different from the number of the management information destination selecting means. Different from the number of the management information destination selecting means, which is provided for each transmission path with respect to the partner station connected by the other transmission path, and which sends the predetermined management information to the partner station. Management information is provided for each partner station connected by a number of transmission lines, and when the management information destination means determines that this is the transfer destination of the management information, the management information is sent from the management information sending means provided for the partner station. And a selection means for selecting a management information transmission means used for transmitting the network management device. 3. The selection means comprises a routing table in which the management information extracting means and the management information destination selecting means to be used for determining the transfer destination of the management information extracted by the management information are associated with each other in advance and stored. The network management device according to claim 1, wherein the management information destination selecting means is selected based on this. 4. The selection means comprises a routing table in which the management information destination selection means and the management information transmission means to be selected are stored in advance in association with each other, and the management information transmission means is selected based on the routing table. The network management device according to claim 2, wherein 5. The network according to claim 1 or 2, wherein the number of the management information destination selecting means is the same as the minimum number of transmission lines provided between the management station and the destination station. Management device. 6. The transmission line is an optical synchronization transmission line for transmitting a framed optical signal, and a plurality of transmission lines are provided between each of the other stations to adopt a redundant configuration, and the management information is The optical signal transmitted by being included in the overhead of the frame of the optical signal and having the management information removed by the management information extracting means is transmitted to the destination station of the transfer destination via the cross-connect device for switching the transfer destination. The network management device according to claim 1 or 2, characterized in that.