JP3534630B2 - Information management method in ring network - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information management method in a ring network in which a plurality of transmission devices are connected in a ring shape, and more particularly to a management method of information (common information) common to all transmission devices.

[0002]

2. Description of the Related Art A ring network system is a communication system in which a plurality of transmission devices are connected in a ring shape.
FIG. 15 is a diagram showing a configuration example of a ring network system. In FIG. 15, the add / drop repeater (AD
M) and an intermediate relay device (REP), etc.
B, C, D, E and F are, for example, SDH (Synchronous
It is connected in a ring shape via a line that bidirectionally transmits the main signal of Digital Hierarchy. The transmission speed of the main signal is
For example, 2.4 Gbps or 10 Gbps. A monitoring terminal (Ops) that monitors and controls the entire ring network is connected to any one of the transmission devices (transmission device A in the figure) by, for example, a LAN (Local Area Network). The monitoring control signal from the monitoring terminal (Ops) is transmitted to each transmission device via the transmission device A. It should be noted that the supervisory control signal is a DCC (Data Communicator) in the ring network.
cation channel) transmitted by communication.

FIG. 16 shows an OS in supervisory control signal communication.
It is a figure which shows the 7-layer stack structure of I (Open Systems Interconnection). In FIG. 16, FIG.
Is a layer structure of DCC communication between transmission devices, FIG.
FIG. 16B shows a layer structure of LAN communication between the monitoring terminal (Ops) and the transmission device, and FIG. 16C shows an X.X between the monitoring terminal (Ops) and the transmission device instead of the LAN. The layer structure when 25 communication protocols are used is shown.

FIG. 17 is a diagram showing a configuration example of a transmission device. In FIG. 17, the high-speed interface unit 10 has two high-speed interfaces (high-speed IF1 and high-speed IF).
2) interfaces the main signal transmitted bidirectionally on the ring network.

The low-speed interface section 20 also interfaces a signal transmitted between the transmission device and a plurality of 0-multiplexing devices (not shown) connected thereto.
The multiplexing device is a device that multiplexes signals transmitted from the exchange. Specifically, the signal from the subscriber terminal is first multiplexed by the exchange to a transmission rate of about 1.5 Mbps or 2 Mbps. Then, the signal from the exchange is further multiplexed to about 150 Mbps by the multiplexer. Then, in the low-speed interface unit 20, low-speed interfaces (low-speed IF1, low-speed IF2, low-speed IF3, ...) Corresponding to the number of multiplexing devices (for example, 16) connected thereto.
The low-speed IF 16) interfaces the signals transmitted to and from the corresponding multiplexer. Then, the low-speed interface unit 20 multiplexes the 16 signals having a transmission speed of 150 Mbps into data having a transmission speed of 2.4 Gbps, and the high-speed interface unit 10 relays the 2.4 Gbps signal on the ring network.

In a transmission device that constitutes such a ring network, for example, in order to repair a fault that has occurred in the transmission device for some reason, or to update the software function of the transmission device, or in the transmission device. Since the power supply was turned off and the power supply was restarted, the transmission device is restarted.

This restart is performed by the supervisory control processing unit 30 which supervises and controls the transmission device itself. And
The monitoring control processing unit 30 restarts the transmission device based on various setting information necessary to restore the transmission device to the original state.

This setting information is composed of information common to all of the plurality of transmission devices that make up the ring network (hereinafter referred to as common information) and information unique to each transmission device (hereinafter referred to as unique information). Information has traditionally been retained in the ring network system in two ways described below.

[0009]

The first method is to store both the common information and the unique information in the backup memory 40 of the transmission device.

FIG. 18 is a diagram showing an example of setting information stored in the backup memories 40 of the transmission devices A, B, C, D, E and F, respectively. According to FIG. 18, the backup memory 40 of each transmission device stores common management information which is common information, each IF common setting information, ring switching information, and individual management information which is unique information and each IF individual setting information. To be done.

Here, the common management information is, for example, network configuration information and user registration information. The IF common setting information includes soft strap setting information common to the entire network. The ring switching information includes a ring switching method and ring switching setting information. BLSR (Bi-directional Loopback Switch)
Ring) and UPSR (Uni-directional Path Switch)
Ring) method. Further, the individual management information includes DCC communication individual setting information, soft strap setting information unique to each device, and the like. Each IF individual setting information is setting information for each IF or each path.

Assuming that the capacity of each of these five pieces of information is 10 Kbytes, the backup memory 40 of each transmission device must have a capacity of 50 Kbytes.

FIG. 19 is a diagram showing a flow of information in the transmission device at the time of restarting in the first method. FIG. 19
According to the above, all the above setting information is sent from the backup memory 40 to the monitoring control processing unit 30. As a result, the monitoring control processing unit 30 can acquire all the setting information necessary for restarting, but the backup memory of each transmission device stores the common information in duplicate and stores all the setting information. Therefore, the backup memory capacity increases,
There is a problem that it causes a cost increase of the transmission device.

Next, the second method is to monitor the common information with the monitoring terminal.
(Ops) backup memory (not shown), and the unique information is stored in each backup memory 40 of each transmission device.

FIG. 20 is a diagram showing an example of setting information stored in the backup memory of the monitoring terminal (Ops) and the backup memory 40 of the transmission devices A, B, C, D, E and F. According to FIG. 20, the common memory management information, each IF common setting information, and ring switching information are stored in the backup memory of the monitoring terminal (Ops). On the other hand, the backup memory 40 of the transmission device stores individual management information and individual IF individual setting information that are unique information.

At the time of restart, the transmission device
Acquire common information from the monitoring terminal (Ops). in this way,
By sharing the common information, it becomes unnecessary to store the backup memory common information of each transmission device in a duplicated manner, so that the capacity of the backup memory of the transmission device can be reduced. Specifically, the capacity of the backup memory of the transmission device is 20 Kbytes, assuming that the capacity of each information is 10 Kbytes. Further, the capacity of the backup memory of the monitoring terminal (Ops) requires 30 Kbytes.

FIG. 21 is a diagram showing a flow of information in the transmission device at the time of restarting in the second method. According to FIG. 21, the unique information is sent from the backup memory 40 to the monitoring control processing unit 30. On the other hand, common information is sent from the monitoring terminal (Ops) via the DCC communication processing unit 50. Thereby, the monitoring control processing unit 30 can acquire all the setting information necessary for restarting.

However, this second method also has the following problems. That is, as shown in FIG. 22, when the transmission device C is restarted, 30 Kbytes of common information is transmitted from the monitoring terminal (Ops) to the transmission device C via the transmission devices A and B. Therefore, to transfer common information, the monitoring terminal
Since a line between (Ops) and the transmission device A is used, communication with a monitoring terminal (Ops) of a transmission device other than the transmission device C is stressed.

Further, as shown in FIG. 23, when all the transmission devices constituting the ring network are simultaneously restarted, the line between the monitoring terminal (Ops) and the transmission device A is shared by all the transmission devices. Information is transmitted. Specifically, between the monitoring terminal (Ops) and the transmission device A, 30 Kbytes of common information transmitted to each of the six transmission devices, that is, 180 Kbytes of information is transmitted. In addition, the transmission device A and the transmission device B
In between, common information transmitted to the transmission devices B, C and D,
That is, 90 Kbytes of information are transmitted, and between the transmission devices B and C, common information transmitted to the transmission devices C and D, that is, 60 Kbytes of information is transmitted, and between the transmission devices C and D. Is the common information transmitted to the transmission device D, that is, 30
Information of K bytes is transmitted, and between the transmission device A and the transmission device F, the common information transmitted to the transmission devices F and E, that is, 60K.
Byte information is transmitted, and between the transmission device F and the transmission device E, common information transmitted to the transmission device E, that is, 30K bytes of information is transmitted.

As described above, at the time of simultaneous restart, since common information for all the transmission devices is transmitted between the monitoring terminal (Ops) and the transmission device A, communication congestion occurs and it is necessary for the restart. There is a problem that it takes a long time.

Further, as shown in FIG.
When restarting multiple transmission devices including (for example,
When restarting the transmission device A and the transmission device C), first, there is a problem that the transmission device C cannot be restarted unless the transmission device A connected to the monitoring terminal (Ops) is restarted. is there.

As described above, the second method has a problem that the communication with the monitoring terminal (Ops) is congested at the time of restarting.

Therefore, an object of the present invention is to reduce the capacity of the backup memory of the transmission device, and to set the setting information necessary for restarting without the transmission device communicating with the monitoring terminal (Ops) on the ring network. It is to provide an information management method on a ring network that can obtain all the information.

[0024]

An information management method on a ring network according to the present invention for achieving the above object comprises a step of dividing common information into a plurality of unit common information,
A step of allocating a plurality of unit common information to each transmission device one by one in order, a step of retaining the allocated unit common information in a memory, and a first transmission device when all the unit common information is required, And transmitting the unit common information that the first transmission device does not have, from another transmission device that has the unit common information to the first transmission device.

As described above, according to the present invention, since the transmission device separately holds the common information, the capacity of the backup memory of the transmission device can be reduced. Further, the transmission device can acquire the necessary common information by communicating with another transmission device, and it is not necessary to communicate with the monitoring terminal (Ops), and communication congestion can be prevented.

For example, the common information is divided into three unit common information, and the transmission devices on both sides of the first transmission device transmit the unit common information held by them to the first transmission device, One transmission device acquires all necessary unit common information.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. However, the technical scope of the present invention is not limited to this embodiment. Note that this embodiment will be described by taking the ring network system shown in FIG. 20 as an example. That is, the transmission devices A, B, C, D, E and F are connected in a ring shape by the SDH line that bidirectionally transmits the main signal. A monitoring terminal (Ops) that monitors the entire ring network system is connected to the transmission device A. Further, the transmission device having the configuration shown in FIG. 21 is applied to the transmission device of the present embodiment. That is, the transmission device includes the high-speed interface unit 10, the low-speed interface unit 20, the monitoring control processing unit 30, and the backup memory 4.
0 and DCC communication processing unit 50.

In the embodiment of the present invention, the common information is separately held in the backup memories of the plurality of transmission devices.

FIG. 1 is a diagram for explaining information stored in the backup memory 40 of the transmission device according to the embodiment of the present invention. In FIG. 1, the backup memory 40 of the transmission device includes, in addition to the individual management information and each IF individual setting information that are the unique information of each transmission device, common management information that configures common information, each IF common setting information, and ring switching. Stores any one of the information. Specifically, the backup memory 40 of the transmission devices A and D stores common management information, the backup memory 40 of the transmission devices B and E stores respective IF common setting information, and the backup memories of the transmission devices C and F are Stores ring switching information. That is, a certain transmission device and the transmission devices on both sides of the transmission device hold common information by dividing it into three pieces.

Then, the capacity of each backup memory 40 becomes 30 Kbytes, which is 20 Kbytes of the unique information and 10 Kbytes for the common information. Therefore,
It is possible to significantly reduce the memory capacity as compared with the first method in the above conventional technique.

At the time of restarting, the common information is transmitted from the transmitters on both sides of the transmitter to be restarted, so that the transmitter to be restarted can obtain all the common information. it can.

FIG. 2 is a diagram for explaining the flow of common information at the time of restarting. Using Figure 2 (a),
The restart of the transmission device C will be described as an example. As shown in FIG. 1, the transmission device C holds the ring switching information in the common information. Then, the transmission devices B and D on both sides of the
Each holds common IF setting information and common management information.

Therefore, the transmission devices B and D transmit the common information held by each to the transmission device C,
The transmission device C can acquire all common information. In this case, compared with the above-mentioned second conventional method, only 10 Kbytes of information are transmitted between the transmission device B and the transmission device C and between the transmission device D and the transmission device C, and the monitoring terminal ( No information is transmitted between Ops) and the transmission device A.

Next, the simultaneous restart of all the transmission devices will be described with reference to FIG. In the case of simultaneous restart, as shown in FIG. 2B, each transmission device
The common information held by itself is transmitted to the transmission devices on both sides thereof. As a result, each transmission device receives the common information held by them from the transmission devices on both sides thereof. In this way, each transmission device transmits the common information possessed by itself to the transmission devices on both sides of each other, whereby each transmission device can acquire all the common information.

In this case, between the transmission devices, 10 Kbytes in each direction in both directions, a total of 2 KB.
Information of 0 Kbytes is transmitted almost evenly. Therefore, unlike the second method of the related art, information to be transmitted does not concentrate in a specific section. Also in this case, the monitoring terminal (O
No information is transmitted between ps) and the transmission device A.

FIG. 3 is a diagram for explaining the flow of information in the restarted transmission device. As described above, the restarted transmission device acquires the common information held by itself from the backup memory 40 of its own, and the common information sent from the transmission devices on both sides is transmitted to the DC device.
It is acquired via the C communication processing unit 50.

FIG. 4 shows the frame format of the main signal transmitted through the main signal line on the ring network. The main signal has a frame structure of 4320 columns × 9 rows in the SDH format with a transmission rate of 2.4 Gbps. And
The common information is SOH (Sec
tion Over Head) part. More specifically,
As illustrated, the common information is RSO in SOH.
H (Regenerator Section Over Head) D1, D2, D
It is inserted as a 192 Kbps signal in 3 bytes and transmitted.

FIG. 5 is a flowchart of restarting according to the embodiment of the present invention. More specifically, FIG.
2A is a control flowchart of the monitoring control processing unit 30 of the transmission device C restarted in FIG. 2A, and FIG. 5B is a monitoring control processing unit 30 of the transmission device B.
3 is a control flowchart of FIG. The control of the monitoring control processing unit 30 of the transmission device D is the same as that of the transmission device B.

First, when the transmission device C is installed, the following information is stored in advance in the backup memory 40 as a part of the individual management information of the transmission device C.

(1) Common management information acquisition destination ID = transmission device D (2) Each IF common setting information acquisition destination = transmission device B (3) Ring switching information acquisition destination = own backup memory (4) Self Communication ID of (5) Communication ID of transmission device B (6) Communication ID of transmission device D These information are set in the transmission device C by the monitoring terminal (Ops) when the transmission device C is installed. It Then, the monitoring control processing unit 30 of the transmission device C (hereinafter, simply referred to as the transmission device C) uses these pieces of information as a part of the individual management information.
Store in backup memory.

In FIG. 5A, first, step S1
At 0, the transmission device C reads the individual management information which is one of the unique information stored in the backup memory 40. Then, a portion necessary for DCC communication (for example, D
The CC communication processing unit 50) is started up.

Next, in step S11, the transmission device C uses the DCC communication to request the transmission device B for each IF common setting information and the transmission device D for the common management information.

Then, step S15 of FIG.
In the above, the monitoring control processing unit of the transmission device B (hereinafter, simply referred to as the transmission device B) receives a transmission request for each IF common setting information from the transmission device C. Then, in step S16, the transmission device B reads each I from the backup memory 30.
The F common setting information is read out, and in step S17,
The read information is transmitted to the transmission device C by DCC communication.

Returning to FIG. 5A, in step S12, the transmission device C confirms that the IF common setting information has been received from the transmission device B and the common management information has been received from the transmission device D.

Further, in step S13, the transmission apparatus C restarts the system by using the information read from the backup memory 40 and the information acquired by communication. Then, in step S14, when the restart is completed, the transmission device C transitions to the normal process.

FIG. 6 is a diagram for explaining the transmission of common information when the transmission device C is restarted in the state where the line between the transmission device B or D and the transmission device C is disconnected. In FIG. 6A, the line between the transmission devices B and C is in a line disconnection state, and in this case, the transmission device C transmits the IF common setting information of the common information as shown in FIG. It cannot be acquired from the transmission device B. Therefore, the transmission device C obtains the IF common setting information from another transmission device E that holds the IF common setting information.

Further, FIG. 6B shows a case where the line between the transmission devices C and D is disconnected, and in this case, the transmission device C
As shown in FIG. 2, the common management information of the common information cannot be acquired from the transmission device D. Therefore, the transmission device C
It is acquired from another transmission device A that holds common management information.

FIG. 7 is a flowchart of restarting in the case of FIG. Since steps S10 to S15 in FIG. 7 are the same as those in FIG. 5A, the description thereof will be omitted.

Then, in the case of the line disconnection between the transmission devices B and C in FIG. 6A, the transmission device C receives the common management information from the transmission device D in step S20 after step S12. Although it is confirmed, it is confirmed that each IF common setting information cannot be normally received from the transmission device B.

Then, in step S21, the transmission device C requests the transmission device E for each IF common setting information. At this time, in the backup memory 40 of the transmission apparatus C, information indicating that the transmission apparatus E is another source when the IF common setting information cannot be obtained from the transmission apparatus B may be set in advance. Then, the transmission device C, based on this information, sends each IF to the transmission device E.
Request common setting information.

Alternatively, when the transmission apparatus C cannot acquire each IF common setting information from the transmission apparatus B, the transmission apparatus C may search for a transmission apparatus that holds this information. Specifically, the transmission device C requests this information in order from the transmission device E next to the transmission device D until it can acquire this information. At this time, the transmission device C does not have a communication ID for communicating with the transmission device E. Therefore, the transmission device C acquires the communication ID of the transmission device E from the transmission device D before making a request to the transmission device E, and uses the communication ID of the transmission device E to obtain the communication ID.
And request information.

If the ID common setting information cannot be acquired from the transmission apparatus E, the transmission apparatus E to the transmission apparatus F
Communication ID is acquired, and then communication with the transmission device F is performed.
In the case of FIG. 6A, since the transmission device C acquires each IF setting common information from the transmission device E, communication with the transmission device thereafter is not performed.

That is, when it is confirmed in step S22 in FIG. 7 that the transmission device C has received the IF common setting information, in step S23, as in step S13, based on all the unique information and common information, Re-start the transmission equipment. Then, in step S24, as in step S14, when the restart is completed, the transmission device C transitions to the normal process.

Further, the transmission devices C and D shown in FIG.
The same applies to the case of disconnection between lines. That is, when the transmission device C cannot acquire the common management information from the transmission device D (step S30), the transmission device C makes an information request to the transmission device A (step S31) and acquires the common management information from the transmission device A. Then, the restarting of the transmission device C is executed (step S32) (step S33), and when the restarting is completed, a transition is made to normal processing (step S34).

In the above embodiment, each transmission device
Upon restarting, common information not owned by itself is acquired from the transmission devices on both sides. That is, the common information is divided into three, and the divided common information (for example, the above-mentioned common management information, each IF common setting information, and ring switching information) is
The transmission devices are sequentially allocated and held in each transmission device. Therefore,
If the number of transmission devices forming the ring network is a multiple of 3, each transmission device can obtain common information that it does not own from the transmission devices on both sides, but if it is not a multiple of 3, There may be a case where common information that is not owned by itself cannot be acquired from the transmission devices on both sides.

FIG. 8 is a diagram for explaining common information assigned to each transmission device according to the number of transmission devices.
In FIG. 8A, as in the above-described embodiment, six transmission devices that are multiples of three are installed on the ring network. Therefore, all transmission devices can acquire necessary common information from both transmission devices.

In FIG. 8B, the transmission device G is added between the transmission devices C and D. At this time, the common information assigned to the transmission device G is the same common management information (1) as the transmission device D. Then, as shown in the figure, since the transmission devices G and D holding the common management information are continuously installed, the transmission device G cannot acquire the IF common setting information (2) from the transmission devices on both sides. The transmission device D cannot acquire the ring switching information (3) from the transmission devices on both sides. In such a case, the transmission device G acquires each IF common setting information (2) from the transmission device E next to the transmission device D,
The transmission device D acquires the ring switching information (3) from the transmission device C next to the transmission device G.

In FIG. 8C, transmission devices E and F are further added.
A transmission device H is additionally installed between and. At this time, the common information assigned to the transmission device H is the same as that of the transmission device E.
This is the F common setting information (2). Then, as shown in the figure, in addition to the transmission devices G and D, the transmission devices E and F cannot acquire all necessary common information from the transmission devices on both sides. In such a case, the transmission apparatus E acquires the ring switching information (3) from the transmission apparatus F next to the transmission apparatus H, and the transmission apparatus H receives the common management information (1) next to the transmission apparatus E. Get from D.

In FIG. 8D, transmission devices F and A are further added.
A transmission device I is additionally installed between and. At this time, the common information assigned to the transmission device I is the same ring switching information (3) as the transmission device F. Then, as illustrated, as compared with FIG. 8C, the transmission devices F and I cannot acquire all necessary common information from the transmission devices on both sides. In such a case, as in the case of FIGS. 8B and 8C, the transmission devices F and I may acquire the necessary common information from the next transmission device.
When the number of transmission devices that cannot acquire the necessary common information increases from the transmission devices on both sides due to the addition of the transmission devices as in (d), it is preferable to optimize the allocation of the common information held by each transmission device.

FIG. 9 is a diagram showing an example of the transmission device management table possessed by the monitoring terminal (Ops). As shown in the figure, the monitoring terminal (Ops) has a correspondence table of the transmission device and common information that it holds, and based on this table,
The allocation change control of the common information held by each transmission device is performed so that each transmission device can acquire necessary common information from the transmission devices on both sides thereof.

FIG. 10 is a diagram for explaining a state in which the allocation of common information is optimized. Specifically, FIG.
From the state of (d), as shown in FIG. 10, by changing the common information assigned to the transmission devices D, E, H, and F, each of the transmission devices again receives the common information required by the transmission devices on both sides. You will be able to get all the information. In particular, in the case of FIG. 10, compared with FIG. 8A, the number of transmission devices is nine, because three transmission devices have been added.
Since it is a multiple and is a multiple of 3, by optimizing, all transmission devices can acquire all necessary common information from the transmission devices on both sides. The transmission device that changes the common information needs to rewrite the common information stored in the backup memory 40.

FIG. 11 is a diagram for explaining the first method for optimizing the allocation of common information. Figure 11
Then, the rewriting command is transmitted from the monitoring terminal (Ops) to each of the transmission devices whose backup memory 40 is rewritten. Then, at that time, common information to be rewritten is also attached and transmitted together with the rewriting instruction.
That is, the IF common setting information is transmitted to the transmission devices D and F together with the rewriting command, the ring switching information is transmitted to the transmission device E together with the rewriting command, and the transmission device H is transmitted.
, The common management information is transmitted together with the rewriting command.

FIG. 12 is a flow chart for implementing the first method for optimization. Note that FIG. 12 illustrates the rewriting process in the transmission device D as an example. First, in step S40, the monitoring control processing unit 3 of the transmission device D
0 (hereinafter simply referred to as transmission device D) is a monitoring terminal (Ops)
The rewriting command sent from and each I attached to it
F common setting information is received. In step S41, the transmission device D erases the common management information area in the backup memory 40 when it confirms that all the data of each IF common setting information is received. Then, the transmission device D is
In step S42, the received IF common setting information is written in the erased area. Then, after the writing is completed, in step S43, the transmission device D determines that the monitoring terminal
Notify the completion of the rewriting process of common information to (Ops).

FIG. 13 is a diagram for explaining the second method for optimizing the allocation of common information. FIG.
Then, the rewriting command is transmitted from the monitoring terminal (Ops) to each of the transmission devices whose backup memory 40 is rewritten. Then, the transmission device that has received the rewriting command acquires the information from the transmission device that holds the common information required for rewriting, and executes the rewriting process. Specifically, the monitoring terminal (Ops) is
Change to the IF common setting information (2), change to the ring switching information (3) for the transmission device E, and change to common management information (1) for the transmission device H. To send a rewrite command. Receiving this rewriting command, each transmission device searches for the common information required for rewriting in order from the transmission device next to it in the predetermined direction, and the transmission device holding that information To get.

FIG. 14 is a flow chart for implementing the second method for optimization. In FIG. 14, the rewriting process in the transmission device D is illustrated. First, in step S50, the transmission device D receives the rewrite command transmitted from the monitoring terminal (Ops). This rewrite command includes an instruction to change the contents of the backup memory 40 into the IF common setting information (2). In step S51, the transmission device D firstly sends each IF to the adjacent transmission device G.
Request common setting information. The transmission device G uses step S6.
When the request is received at 0, it is confirmed in step S61 that the information is not in its own backup memory 40, and in step S62, a response indicating that the information is not held is returned. Returning to step S52, when the transmission device D receives a response from the transmission device G indicating that it does not hold each IF common setting information, the transmission device D requests the next transmission device C for each IF common setting information. Upon receiving the request in step S70, the transmission device C confirms in step S71 that its own backup memory 40 does not have the information, and in step S72,
It responds that it does not have the information. Step S5
Returning to 3, when the transmission device D receives a response from the transmission device C indicating that the IF common setting information (2) is not held, the transmission device D requests the next transmission device B for each IF common setting information.
Upon receiving the request in step S80, the transmission device B confirms that the information is in its own backup memory 40 in step S81, and reads the information from the backup memory 40 in step S82. Then, in step S83, the transmission device B transmits the read IF common setting information to the transmission device D. Returning to step S54, when the transmission device D receives each IF common setting information (2) from the transmission device B,
In step S55, its own backup memory 4
The common management information (1) area in 0 is erased. Then, in step S56, the transmission device D writes each received IF common setting information in the erased area. And
After the writing is completed, in step S57, the transmission device D
Notifies the monitoring terminal (Ops) of the completion of the common information rewriting process.

In the above-described embodiment, by dividing the common information into three, each transmission device acquires the necessary common information from the transmission devices on both sides thereof, but the present invention is not limited to this embodiment.

For example, the common information may be divided into two, and each transmission device may acquire the necessary common information from either side. As a result, even if the required common information cannot be obtained from the transmission device on one side, the required common information can be obtained from the transmission device on the other side. However, the capacity of the backup memory increases as compared with the case of storing information divided into three.

When four or more transmission devices are installed, the common information may be divided by the number of installed transmission devices, and each transmission device may retain the divided information. This makes it possible to further reduce the capacity of the backup memory as compared with the case of the above-described embodiment. However, at the time of restarting, it is necessary to communicate with all the transmission devices, which may cause communication congestion. Further, when communication with a certain transmission device becomes impossible, it becomes impossible to acquire all necessary common information.

In such a case, the divided common information is stored in the memory of the monitoring terminal (Ops), and if the common information cannot be acquired from a certain transmission device, the common information held by the transmission device is monitored. It may be acquired from the terminal (Ops).

As in the above-described embodiment, by allocating the three pieces of common information to the six transmission devices one by one, at least two transmission devices hold the same common information. As a result, even if communication with a certain transmission device becomes impossible, the same information can be obtained from another transmission device, and all necessary common information can be obtained without communicating with the monitoring terminal (Ops). . Therefore, the above inconvenience does not occur.

[0071]

As described above, according to the present invention, in a ring network in which a plurality of transmission devices are connected in a ring shape,
Since the transmission device separately holds the common information, the capacity of the backup memory of the transmission device can be reduced. Further, the transmission device can acquire necessary common information by communicating with the transmission devices on both sides, it is not necessary to communicate with the monitoring terminal (Ops), and communication congestion can be prevented.

[Brief description of drawings]

FIG. 1 is a diagram for explaining information stored in a backup memory 40 of a transmission device according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining transmission of common information at restart.

FIG. 3 is a diagram for explaining a flow of information in a restarted transmission device.

FIG. 4 is a frame format of a main signal transmitted on a main signal line on a ring network.

FIG. 5 is a flowchart of restarting in the embodiment of the present invention.

FIG. 6 shows a case where the transmission device C has a disconnection between the transmission devices B and C.
FIG. 5 is a diagram for explaining transmission of common information when restarting the device.

FIG. 7 is a flowchart of restarting in the case of FIG.

FIG. 8 is a diagram for explaining common information assigned to each transmission device according to the number of transmission devices.

FIG. 9 is a diagram showing an example of a transmission device management table included in a monitoring terminal (Ops).

FIG. 10 is a diagram for explaining a state in which the allocation of common information is optimized.

FIG. 11 is a diagram for explaining a first method for optimizing allocation of common information.

FIG. 12 is a flow chart implementing a first method for optimizing.

FIG. 13 is a diagram for explaining a second method for optimizing the allocation of common information.

FIG. 14 is a flow chart implementing a second method for optimizing.

FIG. 15 is a diagram showing a configuration example of a ring network system.

FIG. 16 is a diagram showing a 7-layer stack structure of OSI in supervisory control signal communication.

FIG. 17 is a diagram showing a configuration of a transmission device.

FIG. 18 is a diagram showing an example of setting information stored in each backup memory 40 of the transmission devices A, B, C, D, E, and F.

FIG. 19 is a diagram showing a flow of information in the transmission device at the time of restarting in the first method.

FIG. 20 is a backup memory of a monitoring terminal (Ops) and a backup memory 4 of transmission devices A, B, C, D, E and F.
It is a figure which shows the example of the setting information stored in 0.

FIG. 21 is a diagram showing a flow of information in the transmission device at the time of restarting in the second method.

FIG. 22 is a diagram for explaining the problem of restarting by the conventional second method (No. 1).

FIG. 23 is a diagram for explaining the problem of restarting by the second conventional method (No. 2).

FIG. 24 is a diagram for explaining the problem of restarting by the second conventional method (No. 3).

[Explanation of symbols]

10 High-speed interface section 20 Low speed interface 30 Monitoring control processing unit 40 backup memory 50 DCC communication processing unit

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Claims (11)

(57) [Claims] 1. A method of managing information common to a plurality of transmission devices on a ring network (hereinafter, referred to as common information), wherein the common information is divided into a plurality of unit common information, and the plurality of units. Assigning the common information to each transmission device one by one in order, retaining the assigned unit common information in a memory, and when the first transmission device requires all the unit common information, Unit common information that one transmission device does not have,
And a step of transmitting it to the first transmission device from another transmission device that owns the information transmission method. 2. The common information according to claim 1, wherein the common information is divided into three unit common information, and the transmission devices on both sides of the first transmission device store the unit common information held by the first transmission device in the first transmission information. An information management method, wherein the first transmission device acquires all necessary unit common information by transmitting the information to the device. 3. The unit transmission information according to claim 1, wherein the second transmission device and the third transmission device hold the same unit shared information, and the second transmission device transfers the unit shared information to the first transmission device. Is not transmitted, the third transmission device transmits the unit common information to the first transmission device. 4. The third transmission device according to claim 3, wherein the third transmission device is provided as another acquisition destination transmission device when the unit common information cannot be acquired from the second transmission device. An information management method characterized by being preset. 5. The third transmission device according to claim 3, wherein when the first transmission device cannot acquire the unit common information from the second transmission device, the first transmission device searches for the third transmission device and An information management method, characterized in that the unit common information is acquired. 6. A predetermined number of transmission devices that cannot acquire all necessary unit common information in the unit common information transmitted from the transmission devices on both sides by adding a transmission device on the ring network according to claim 2. In the above case, again, the unit common information assigned to each transmission device is acquired so that each transmission device can acquire all necessary unit common information by the unit common information transmitted from the transmission devices on both sides thereof. An information management method, further comprising a step of changing. 7. The information management method according to claim 6, wherein a monitoring terminal that monitors the entire ring network controls the changing step. 8. The monitoring terminal according to claim 7, wherein the monitoring terminal transmits a change command and unit common information necessary for a change to a transmission device that needs to change the unit common information held therein, and the transmission device comprises: An information management method, characterized in that the unit common information held in the memory is rewritten to the unit common information transmitted from the monitoring terminal. 9. The monitoring terminal according to claim 7, wherein the monitoring terminal transmits a change command and a type of the unit common information necessary for the change to a transmission device that needs to change the unit common information held by the monitoring terminal. Based on the type, finds a transmission device that holds the unit common information necessary for change, acquires the information from the transmission device, and rewrites the unit common information held in the memory with the acquired unit common information. And information management method. 10. In a ring network system in which a plurality of transmission devices are connected in a ring shape, each transmission device separately holds information common to all of the plurality of transmission devices (hereinafter referred to as common information). And ring network system. 11. The transmission device according to claim 10, when any of the transmission devices requires all of the common information, the transmission device retains information of the common information which is not possessed by the transmission device. A ring network system characterized in that it is acquired from another transmission device that is operating.