JP2004140571A - TRANSMISSION SYSTEM, ITS MONITORING CONTROL DEVICE, AND METHOD OF UPDATING SETTING OF PROTECTION FUNCTION - Google Patents

Abstract

Provided are a transmission system, a monitor and control device therefor, and a method for updating the setting of a protection function, which simplifies a procedure for resetting a protection function according to a change in a network configuration, thereby improving convenience in operation. I do.
When a form of a ring network changes, a recognition processing unit recognizes the change, and receives the setting, and sets by a setting message generation processing unit to reset an APS in response to a change in the network form. Generate a message. This setting message is transmitted to each of the nodes 1-1 to 1-n by the transmission processing unit 65c, and the APS setting table 6a stored in the storage unit 6 of each of the nodes 1-1 to 1-n is updated to thereby update the APS. Update settings automatically.
[Selection diagram] Fig. 4

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a transmission system conforming to standards such as SDH (Synchronous Digital Hierarchy) / SONET (Synchronous Optical Network), a monitoring and control device provided in the transmission system, and a setting and updating method of a protection function provided in the transmission system.
[0002]
[Prior art]
Generally, an information transmission system includes a node device that performs information transmission, and a monitoring control device that provides an OAM (Operations, Administration and Maintenance) service to the system. Such systems are often configured under the SDH / SONET architecture.
[0003]
In this type of system, the network is formed in a ring shape, and a fault-tolerant performance is improved by adopting a redundant configuration including an active system and a standby system in the information transmission line and the internal configuration of the device. When a switching factor such as a line failure occurs, the path of the path transmitting the service traffic is switched to the standby side by the autonomous distributed control of each node device, and the service traffic is relieved from the failure. Further, even in the case of a failure in the apparatus, service traffic can be bypassed by avoiding the failure location.
[0004]
This kind of protection function is known as APS (Automatic Protection Switching). APS has roughly two switching systems. One is a method in which when a switching factor occurs in a working line in a section (Segment: hereinafter referred to as a segment) sandwiched between adjacent node devices, traffic is diverted to a protection line in the same segment. This is called switching. The other is a method in which when a switching factor occurs in both the working system and the protection system line of the same segment, the traffic is diverted to the protection system lines of all segments other than this section, which is called ring switching. Is done. Ring switching includes a method of setting the shortest path as a high-performance version thereof, and in this method, a part of the remaining backup line is used.
[0005]
Ring systems are often set up for each segment when laying. A form in which the ring system is completely ring-shaped is called a full ring, and a form in which only a part of the ring system is partially connected is called a partial ring. In particular, a state where a failure occurs in the full ring is also treated as a partial ring.
[0006]
When the network configuration changes from a partial ring to a full ring, or vice versa, it is necessary to update the APS settings accordingly. This is because, in a partial ring, traffic cannot flow through some segments, so that ring switching cannot be performed. If the ring switching operation is enabled in the partial ring configuration, an error occurs and the operation of the system is hindered.
[0007]
By the way, conventionally, the setting of the APS is manually updated according to the change of the network configuration. APS settings are updated by inputting a command to each node device in the network. In the past, a series of procedures such as selection of an appropriate command, designation of an input location, and input processing had to be manually performed, which was very complicated. In addition, there is a risk of an operation error, and there is also a problem that it takes a long time to complete the processing.
[0008]
[Problems to be solved by the invention]
As described above, in the conventional transmission system, a complicated manual procedure is required for the resetting process of the protection function according to the change of the network configuration. Therefore, there are problems such as a heavy burden on the operator, a possibility of an operation error, and a long time required to complete the processing.
[0009]
The present invention has been made in view of the above circumstances, and its purpose is to simplify a procedure for resetting a protection function in accordance with a change in a network configuration, thereby improving a convenience in operation, and a transmission system therefor. It is an object of the present invention to provide a monitoring control device and a setting update method of a protection function.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a transmission system including a service line for transmitting service traffic and a protection line which is a spare resource of the service line, wherein a segment in which the service line and the protection line are laid is provided. A plurality of node devices that form a network that takes either a full ring or a partial ring depending on the state of the segment, and a monitoring control device that provides an OAM service to the network. And
The network has a ring-type function that can be operated only in the full ring, and a span-type function in which the operable segment is limited in the partial ring. A protection function that operates to rescue the service traffic from the failure by using the protection line,
The monitoring control device includes a recognizing unit that recognizes a form of the network based on notification information respectively notified from the plurality of node devices, and the segment according to the form of the network recognized by the recognizing unit. Setting message generating means for generating a setting message for setting the lockout or release of the lockout of the protection function for each of the ring-type function and the span-type function, and a setting message generated by the setting message generating means Transmitting means for transmitting to each of the plurality of node devices,
Each of the plurality of node devices includes a setting change unit that changes a setting of the protection function in the own device for each of the ring-type function and the span-type function according to a setting message transmitted by the transmission unit. It is characterized by the following.
[0011]
By taking such means, the form of the network is recognized by the recognition means as a full ring or a partial ring. According to the recognition result, a setting message for setting a protection function such as APS is automatically generated by the setting message generating means. This message is transmitted to each node device by the transmission unit, and the setting of the protection function in each node device is updated by the setting change unit.
[0012]
That is, the setting of the APS according to the change in the form of the network is automatically updated by processing led by the machine or the system. As a result, the procedure for resetting the protection function is greatly simplified and the burden on the operator is reduced. In addition, operation errors can be prevented, and the time until the processing is completed can be shortened.
[0013]
Further, in the present invention, when a plurality of networks formed by the plurality of node devices are provided, the recognizing unit recognizes the form of each network individually, and the setting message generating unit is configured by the recognizing unit. The setting message is generated individually for each network of which the form is recognized, and the setting change unit changes the setting of the protection function individually for each network.
[0014]
In this way, even when the transmission system is composed of, for example, a plurality of wavelength-multiplexed networks, it is possible to manage each network.
[0015]
Further, the monitoring control device according to the present invention further comprises a grasping means for grasping a failure occurrence form in the network based on the notification information, and a notification for notifying a user of the trouble occurrence form grasped by the grasping means. Means, and instruction accepting means for accepting the user's domain designation instruction made according to the failure occurrence mode reported by the reporting means, wherein the setting message generating means is designated via the instruction accepting means. And generating the setting message for the specified domain.
[0016]
In this way, the user is notified of the failure occurrence mode by, for example, displaying on a display. Then, a setting message corresponding to the user's domain designation operation performed based on the result is generated. Therefore, it is possible to reflect the user's intention in the partial ring setting process, and it is possible to provide a transmission system that further improves convenience.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this embodiment, a system conforming to SDH (Synchronous Digital Hierarchy) as a global standard is assumed.
[0018]
FIG. 1 is a system diagram showing a configuration example of a transmission system according to an embodiment of the present invention. This system includes, for example, a plurality of stations (Stations) ST-1 to ST-m installed across the ocean. Each of the station buildings ST-1 to ST-m includes a plurality of node devices (NODE: hereinafter referred to as nodes) 1-1 to 1-n. A section sandwiched between adjacent nodes is called a segment.
[0019]
Nodes 1-1 to 1-n are connected in a ring by a high-speed line OF extending between stations, and a ring network is formed among a plurality of nodes 1-1, between nodes 1-2,..., And nodes 1-n. Is done. That is, there are n ring networks, and each ring network has m nodes. Each ring network has a protection function called APS (Automatic Protection Switching).
[0020]
Each of the high-speed lines OF connecting the nodes 1-1, 1-2,... And 1-n has a service line and a protection line (shown in FIG. 2). Each high-speed line OF transmits an optical signal of a wavelength assigned to each ring network. That is, the transmission wavelengths are different for each ring network, and these wavelengths are multiplexed to form a wavelength division multiplexing line FL. For the interface of the high-speed line OF, for example, STM-64 (Synchronous Transfer Module-level 64: equivalent to 10 Gbps) that conforms to SDH is adopted.
[0021]
The nodes 1-1 to 1-n in the stations ST-1 to ST-m are connected to the station monitoring device (SSE) 2 in each station. The SSE 2 is connected to the supervisory control device (NME) 3 via a LAN (Local Area Network). The monitoring control device 3 provides an OAM service over the entire area of the network. A router (Router) 4 is connected to the LAN, and a management network ML that connects the monitoring control devices 3 in each station via the router 4 is formed. The management network ML is logically realized as a DCC (Data Communication Channel) in an SOH (Section Over Head) of an SDH frame transmitted via the wavelength multiplex line FL.
[0022]
FIG. 2 is a diagram showing a configuration of nodes 1-1 to 1-n in FIG. Here, the node 1-1 is represented, but the other nodes 1-2 to 1-n have the same configuration. In FIG. 2, the service line SL is connected to the transmission / reception module 10 on the East side and to the transmission / reception module 12 on the West side. The protection line PL is connected to the transmission / reception module 11 on the East side and to the transmission / reception module 13 on the West side. That is, the transmitting / receiving modules 10 and 12 belong to the active system, and the transmitting / receiving modules 11 and 13 belong to the standby system.
[0023]
Note that East and West are names for distinguishing two systems of an incoming route and an outgoing route related to transmission and reception of signals. In the present embodiment, in each of the nodes 1-1 to 1-n, the direction to the station having the larger subscript m is West, and the direction to the station having the smaller subscript m is East. For example, for the node 1-1 of the station ST-1, the direction toward the station ST-2 is West, and the direction toward the station ST-m is East.
[0024]
An STM-64 signal introduced into the device via the transmission / reception modules 10 to 13 is given to a time slot exchange unit (TSA: Time Slot Assignment) 201 and a time slot exchange unit 202. The time slot switching units 201 and 202 drop a predetermined time slot among the time slots multiplexed on the STM-64 signal. The dropped slot is transmitted from the tributary transmission line LL as a low-order group signal via the tributary interface (LS I / F) shelves 31 to 3k.
[0025]
On the other hand, the low-order group signals introduced from the tributary transmission line LL into the device via the LS I / F shelves 31 to 3k are supplied to the time slot switching units 201 and 202, and are transmitted to the predetermined time slots of the STM-64 frame. It is added to a time slot and transmitted to another node via the high-speed line OF.
[0026]
The time slot exchange unit 201 and the time slot exchange unit 202 are duplicated in pairs. The time slot exchange unit 201 is operated as an active system in a normal state of the system. When a failure occurs in the time slot exchange unit 201, the time slot exchange unit 202 is operated instead of the time slot exchange unit 201. In this way, internal redundancy is realized.
[0027]
When the system is normal, the time slot exchange unit 202 operates so as to be involved in transmission of part-time traffic (P / T). The part-time traffic is a signal carrying information different from the service traffic flowing through the service line SL. When the system is normal, the protection line PL becomes empty because there is no failure. Part-time traffic is traffic transmitted using this band, and is treated as traffic having lower priority than service traffic.
[0028]
In addition, the node 1-1 in FIG. 3 includes a control unit 5, a storage unit 6 for storing various control programs and the like, and a management network interface (I / F) 7 for interfacing with the SSE2.
[0029]
The control unit 5 includes an APS control unit 5a and a setting change processing unit 5b. The APS control unit 5a executes various controls related to the operation of the APS. APS is a function of relieving service traffic from failures by autonomous cooperative operation between nodes belonging to the same ring network. That is, when the occurrence of a failure is detected in any of the nodes, information is transmitted to another node via the K byte channel, and service traffic is restored to the protection line PL by internal switching of the node.
[0030]
The APS has two operation modes, span switching and ring switching. The span switching is a form when a failure occurs in the service line SL in a certain segment, and the protection line PL in the same section is used. The ring switching is a form when a failure occurs in the service line SL and the protection line PL of the same segment, and all the protection lines PL having no failure are used. Due to such a difference in the operation mode, the ring switching can operate only in the full ring, and the span switching limits the operable segments in the partial ring. The APS control unit 5a executes one of the switching methods according to the failure occurrence mode, and when the failure occurs, whether the network is a full ring or a partial ring, or according to the setting in the system. I do.
[0031]
The setting change processing unit 5b changes the APS setting in the own node when a setting message for updating the APS setting is given from any of the monitoring control devices 3. In particular, the setting change processing unit 5b changes the APS setting for each of the ring switching and the span switching. In the present embodiment, since a plurality of ring networks exist in the system, the setting change processing unit 5b individually changes the APS setting for each ring network.
[0032]
The storage unit 6 stores the APS setting table 6a in a predetermined storage area.
FIG. 3 is a schematic diagram showing the APS setting table 6a. This table is a table for setting the operability / impossibility of the span switching and the ring switching for each node (here, distinguished by symbols A to G) for each of the West and East directions. The APS setting table 6a is used when operating the APS together with data such as a ring map or fabric which is setting state information of a path set in the system.
[0033]
A state in which the APS cannot operate, that is, a state in which the operation is not permitted, is referred to as lockout. In the setting at the time of the full ring in FIG. 3A, since the bit 0 is described in all the resources, there is no locked-out resource. This state is referred to as a state where the lockout is released. On the other hand, in the setting at the time of the partial ring in FIG. 3B, bit 1 meaning lockout is described in some resources, and the operation of the APS is prohibited in some sections.
[0034]
FIG. 4 is a block diagram showing a configuration of the monitoring control device 3 shown in FIG. The monitoring control device 3 includes an input / output unit 61 as a human-machine interface, a display unit 62, an interface unit (LAN I / F) 63 for connecting the SSE 2 and the router 4 via a LAN, and various operation programs. And a main control unit 65.
[0035]
The main control unit 65 includes a recognition processing unit 65a, a setting message generation processing unit 65b, a transmission processing unit 65c, a grasp processing unit 65d, a notification processing unit 65e, and an instruction reception processing unit 65f.
[0036]
The recognition processing unit 65a recognizes the form of each ring network in real time based on the notification information (Notification) notified from each of the nodes 1-1 to 1-n to the monitoring control device 3. That is, the recognition processing unit 65a individually recognizes and manages whether the ring is a full ring or a partial ring for each ring network. When the recognition processing unit 65a recognizes that one or a plurality of ring networks have changed in form, the recognition processing unit 65a notifies the setting message generation processing unit 65b and the like to take appropriate measures.
[0037]
The setting message generation processing unit 65b outputs a setting message for setting APS lockout or lockout release for each ring switching and span switching for each segment according to the network configuration recognized by the recognition processing unit 65a. Generate. In the present embodiment, since a plurality of ring networks exist in the system, the setting message generation processing unit 65b generates a setting message individually for each ring network.
[0038]
The setting message generation processing unit 65b generates a setting message for the domain specified via the instruction reception processing unit 65f. The domain means a distinguishable resource existing in the system, for example, any ring network or any segment in the ring network. That is, when there is a user's instruction, the setting message generation processing unit 65b generates a setting message for setting the APS for the resource corresponding to the instruction.
[0039]
When the network is changed from the full ring to the partial ring as a result of the recognition by the recognition processing unit 65a, the setting message generation processing unit 65b includes a command to lock out ring switching in all segments and a command to lock out a segment that does not belong to the partial ring. And generating a setting message including a command to lock out span switching.
[0040]
In SDH, a command to lock out ring switching is known as a 'Lockout of Protection Ring'. Further, a command for locking out the span switching is known as 'Lockout of Protection Span'. Each command is described in the upper 4 bits of the K1 byte defined in SOH (Section Overhead) of the SDH frame format.
[0041]
In addition, when the network changes from partial ring to full ring as a result of recognition by the recognition processing unit 65a, the setting message generation processing unit 65b generates a setting message including a command to release APS lockout in all segments.
[0042]
Further, as a result of the recognition by the recognition processing unit 65a, when the network changes from the partial ring to a partial ring having a different topology from the partial ring, the setting message generation processing unit 65b generates a new setting message corresponding to the change in the topology. Generate.
[0043]
In short, the setting message generation processing unit 65b transmits a message for updating the APS setting table 6a in the nodes 1-1 to 1-n when the form of the network is changed or when a user's instruction is given. Generate.
[0044]
The transmission processing unit 65c transmits the setting message generated by the setting message generation processing unit 65b to each of the nodes 1-1 to 1-n via the management network ML. It is not necessary to notify the setting message to all the nodes 1-1 to 1-n, and the setting message may be transmitted only to the node that the monitoring control device 3 is to operate.
[0045]
The grasping processing unit 65d grasps a failure occurrence mode in the network based on the notification information notified from each of the nodes 1-1 to 1-n to the monitoring control device 3. The notification processing unit 65e notifies the user of the occurrence of the failure grasped by the grasping processing unit 65d by displaying the failure occurrence form on the display unit 62 in a graphics manner. At this time, the display color of a GUI (Graphical User Interface) symbol on the display unit 62 is changed according to the presence or absence of a failure. For example, the display color of a service line having a failure is red, and the display color of a service line having no failure is green.
[0046]
The instruction reception processing unit 65f receives a user's domain designation instruction in the form of a click operation on a GUI symbol displayed on the display unit 62, for example, using a mouse (not shown) of the input / output unit 61 or the like. The user's domain designation instruction is performed to select and designate a domain for which an APS is to be set, according to the failure occurrence mode reported by the notification processing unit 65e.
[0047]
The APS control unit 5a and the setting change processing unit 5b in the control unit 5 of the nodes 1-1 to 1-n, the recognition processing unit 65a in the main control unit 65 of the monitoring control device 3, and the setting message generation processing unit 65b , The transmission processing unit 65c, the grasp processing unit 65d, the notification processing unit 65e, and the instruction reception processing unit 65f, all of which have, for example, software processing of a CPU (Central Processing Unit) as a core and other processing units or hardware It is a functional object realized by a cooperative operation with the wear or the like.
[0048]
Next, the operation of the above configuration will be described. The transmission system is constructed for each segment, and is finally operated in a full ring state. In the case where the segment is being constructed and the system is operated before the full ring network is established, a partial ring network configuration is used. The partial ring is also applied when a failure occurs in a segment or a node device during operation of a network.
[0049]
FIG. 5 is a flowchart showing a processing procedure in the above configuration. In FIG. 5, when a line failure occurs in the monitored and controlled ring network (step S1), first, notification information indicating the line failure is reported from the node that has detected the failure to the monitoring control device 3 (step S2). .
[0050]
The monitoring control device 3 that has received the notification information reflects the content of the notification information on the display content of the display unit 62, and displays a warning (CAUTION) screen as shown in FIG. 6 on the display unit 62 (step S3). .
[0051]
FIG. 6 is a diagram illustrating an example of the CAUTION screen displayed on the display unit 62 in step S3. On this screen, the user, that is, the monitoring control device 3 determines whether or not to issue a read request for information to the node in order to obtain knowledge about the line failure and the node failure in all the ring networks to be monitored and controlled. It is a screen for asking the operator of this.
[0052]
When the 'Cancel' button (FIG. 6B) on the CAUTION screen is clicked in step S3 of FIG. 5, the CAUTION screen closes (step S4). On the other hand, when the “OK” button (FIG. 6A) on the CAUTION screen is clicked, the CAUTION screen closes, and the monitoring control device 3 sends the information to all the nodes 1-1 to 1-n of the ring network. Then, a line state read request is issued (step S5).
[0053]
In the next step, a Network Alarm Summary Display shown in FIG. 7 and a Partial Network Configuration Setting screen shown in FIG. 8 are displayed on the display unit 62 (Step S6).
[0054]
The screen of FIG. 7 is a screen showing the state of occurrence of a failure in a plurality of ring networks for each ring network. In this screen, each ring network is distinguished by a tab (Tab) on the left side of the screen. For the sake of convenience, on this screen, individual nodes are denoted by reference numerals A to G for distinction. That is, seven nodes are provided in one ring network, and each of the nodes A to G is displayed as a symbol. Symbols # 1 to # 32 are assigned to each ring network. Further, the service line SL and the protection line PL connecting each node are represented by a solid line (SRV) and a dotted line (PRT), respectively.
[0055]
The line failure information or node failure information collected in response to the request issued in step S5 in FIG. 5 is reflected in the display contents of the Network Alarm Summary Display in FIG. FIG. 7 shows that a line fault has occurred in the segment between nodes A and B and a segment between nodes B and C, and a node fault has occurred in node B. Cross marks ((a), (b), and (c) in FIG. 7) are displayed at the failure points. Also, these resources are displayed in a different color from other non-failed resources. In the example of FIG. 7, # is added to the ring network tab # 1 having a failure so that a ring network having a failure can be distinguished from a ring network having no failure.
[0056]
Now, on the screen of FIG. 7, the operator can check the fault state of the line or the node. Next, the Partial Network Configuration Setting screen of FIG. 8 will be described.
[0057]
The screen of FIG. 8 is a screen for designating a ring network and giving a partial ring setting from the operator for the designated ring network. On this screen, a window (FIG. 8A) for arbitrarily selecting the ring networks # 01 to # 32, a schematic diagram showing the configuration of the ring network (FIG. 8C), and a Read button ( 8 (b)), a Set button (FIG. 8 (d)), a Quit button (FIG. 8 (g)), and a Console window (FIG. 8 (e)). The symbols corresponding to the nodes A to G and the segments a to f are all clickable buttons, and are objects that respond to a mouse click operation.
[0058]
Next, a procedure for setting a partial ring network configuration using the screen of FIG. 8 will be described.
9 and 10 are flowcharts showing the continuation of the processing procedure of FIG. In FIG. 9, the operator clicks and selects a ring network for setting a partial ring network configuration using the window (a) of FIG. 8 (step S8). By using the Ctrl key on the keyboard of the input / output unit 61, a plurality of ring networks can be selected and designated.
[0059]
Next, when the “Read” button (b) on the screen in FIG. 8 is clicked, a request to read out the current setting state of the ring network selected in step S8 is issued to each of the nodes 1-1 to 1-n. Is performed (step S9). When the setting state information has been collected from all the nodes, the process proceeds to step S10.
[0060]
If the collected setting state information is different for each ring network (No in step S10), a CAUTION screen (not shown) notifying the fact is displayed (step S11). When the "OK" button on the CAUTION screen is clicked, the CAUTION screen closes, and the processing procedure returns to step S8. On the other hand, if the setting states of all the ring networks are the same in step S10, the CAUTION screen is not displayed, and the processing procedure proceeds to the next step. In the next step, the contents of the collected setting state information are reflected on the screen display of FIG. 8 as shown in FIG. 8C (step S12).
[0061]
When the setting state is displayed on FIG. 8C, the partial ring network configuration is set using the window of FIG. In this procedure, clickable buttons ((c) -1, (c) -7, (c) -8 in FIG. 8) indicating the line or node where a failure has occurred are clicked. Then, (x) marks are added to these symbols to indicate that a partial ring configuration is to be set. When a plurality of ring networks are selected in this procedure, this setting is reflected on all of the selected ring networks.
[0062]
When the setting of the partial ring network configuration is completed, the operator clicks the 'Set' button ((d) in FIG. 8) (step S13). Then, a CAUTION screen (not shown) for confirming whether or not the setting made in FIG. 8 is actually performed is displayed (step S14). When the “Cancel” button is clicked on the CAUTION screen, the window shown in FIG. 8 is displayed again. When the “OK” button on the CAUTION screen is clicked, a setting message reflecting the contents set in the window of FIG. 8 is generated by the setting message generation processing unit 65b (step S15).
[0063]
Here, a setting message corresponding to the APS setting table 6a of FIG. 3B is generated. That is, in the partial ring, ring switching is prohibited in all segments, so that ring switching is locked out for all resources as shown in FIG. 3B. In addition, in the state of FIG. 8, since the span switching is prohibited in the segments f and g, the span switching is locked out for the corresponding resource (indicated by the arrow ↑).
[0064]
Now, when the setting message is generated in step S15, this message is issued to each node belonging to the ring network selected in FIG. 8A (step S16).
[0065]
A message is issued for each ring network. First, one ring network will be described. For each node in FIG. 8 (c) (FIGS. 8 (c) -2, (c) -3, (c) -4, (c) -5, (c) -6, (c) -0) A configuration message is issued clockwise.
[0066]
Thereafter, the monitoring control device 3 receives responses (SetOK or SetNG) from all nodes that have issued the setting messages, and displays the responses on the console (Console) of FIG. 8E (step S18). Is completed for all nodes, a setting message is sent to the next ring network in the same procedure.
[0067]
When the transmission of the setting message to all the ring networks selected in FIG. 8A ends, and “SetOK” of all the nodes is displayed in Console (FIG. 8E) (step S17 in FIG. 10). 8, “SetOK” is displayed in the footer section (FIG. 8F) on the screen of FIG. 8, and the set partial ring network configuration is displayed again in FIG. 8C (step S18).
[0068]
On the other hand, it is assumed that 'SetNG' is displayed on the Console after the transmission of the setting message. This means that the partial ring setting has not been normally completed in the corresponding node. Even if there is only one node displaying this message, 'SetNG' is displayed in the footer section (FIG. 8 (f)) of FIG. 8 (step S19), and the partial ring setting ends normally. It indicates that it did not. When the 'Quit' button (FIG. 8G) in FIG. 8 is clicked through the above procedure, the partial ring network setting screen is closed.
[0069]
Next, a description will be given of a procedure for resetting the partial ring network when a part of the line or node failure is recovered from the state where the partial ring network setting is applied due to the failure. Such a case corresponds to a case where the same partial ring is used, but the topology is changed.
[0070]
When the failure is recovered when the partial ring setting is valid, notification information indicating failure recovery is notified to the monitoring control device 3 from the node that has detected the failure. Then, the process proceeds to step S3 in FIG. 5, and the CAUTION screen in FIG. 2 is displayed.
[0071]
When the “OK” button on the CAUTION screen is clicked, the CAUTION screen is closed, and a transmission path state read request is issued to all the ring network nodes (step S5). At the same time, a Network Alarm Summary Display (FIG. 7) and a Partial Network Configuration Setting screen (FIG. 8) are displayed.
[0072]
The status of the line or node collected by the issuing request is displayed on the Network Alarm Summary Display. When the failure has been recovered, the X mark (FIGS. 7A, 7B, and 7C) at the recovered location disappears.
[0073]
When all the line failures and node failures on the ring network have been recovered, the # mark (FIG. 7D) displayed on the Network Alarm Summary Display tab disappears.
[0074]
With such a display, the operator can confirm that the failure of the line or the node has been restored. Next, the operator resets the partial ring network.
[0075]
First, a ring network for which a partial ring network is to be reset is selected from (a) of the Partial Network Configuration Setting screen (FIG. 8) (step S8). Next, a request to read the current setting state of the selected ring network is issued to each of the nodes 1-1 to 1-n by clicking the 'Read' button (FIG. 8B) on the screen with the mouse (FIG. 8B). Step S9).
[0076]
If the collected setting state information is different for each ring network (No in step S10), a CAUTION screen (not shown) notifying the fact is displayed (step S11). When the "OK" button on the CAUTION screen is clicked, the CAUTION screen closes, and the processing procedure returns to step S8. On the other hand, if the setting states of all the ring networks are the same in step S10, the CAUTION screen is not displayed, and the processing procedure proceeds to the next step. In the next step, the contents of the collected setting state information are reflected on the screen display of FIG. 8 as shown in FIG. 8C (step S12).
[0077]
When the setting state is displayed on FIG. 8C, the partial ring network configuration is reset using the window of FIG. In this procedure, the clickable buttons ((c) -1, (c) -7, (c) -8 in FIG. 8) indicating the line and the node from which the fault has been recovered are clicked to remove the mark (x). Here, when a plurality of ring networks are selected, this setting is reflected on all of the selected ring networks. When the reconfiguration of the partial ring network configuration is completed, the operator clicks the 'Set' button ((d) in FIG. 8) (step S13).
[0078]
Then, a CAUTION screen (not shown) for confirming whether or not the setting made in FIG. 8 is actually performed is displayed (step S14). When the “OK” button on the CAUTION screen is clicked, a new setting message reflecting the contents reset in the window of FIG. 8 is newly generated by the setting message generation processing unit 65b (step S15).
[0079]
The newly generated setting message is issued to each node belonging to the ring network selected in FIG. 8A (step S16). Then, when it is displayed in the Console (FIG. 8E) that the reset of the partial ring has been normally completed in each node, the reset partial ring network configuration is displayed again in FIG. 8C. Then, 'SetOK' is displayed in the footer section (FIG. 8F) on the screen. If at least one of the units has an NG response, 'SetNG' is displayed in the footer section (FIG. 8F) on the screen.
[0080]
As described above, in the present embodiment, when the form of the ring network changes, the recognition processing unit 65a recognizes the change, and in response to this, the setting message generation processing unit 65b generates the APS in response to the change in the network form. Generate a configuration message for resetting. This setting message is transmitted to each of the nodes 1-1 to 1-n by the transmission processing unit 65c, and the APS setting table 6a stored in the storage unit 6 of each of the nodes 1-1 to 1-n is updated to thereby update the APS. The settings are updated automatically.
[0081]
With this configuration, the setting of the APS according to the change in the form of the network is automatically updated by a process initiated by the machine or the system. As a result, the procedure for resetting the protection function is greatly simplified and the burden on the operator is reduced. In addition, operation errors can be prevented, and the time until the processing is completed can be shortened.
[0082]
From these facts, it is possible to simplify the procedure for resetting the protection function in accordance with the change in the network configuration, thereby improving the operation convenience of the transmission system, its monitoring control device, and updating the setting of the protection function. A method can be provided.
[0083]
Note that the present invention is not limited to the above embodiment. For example, in the present embodiment, when a change in the network configuration is detected, the current state of the ring network is visually displayed to notify the operator, and the resource corresponding to the user's domain designation corresponding to the state is partially displayed. Ring settings are now implemented. Instead, when a change in the network configuration is detected, the resource for which the partial ring configuration is to be set is calculated on the machine side, and a setting message is generated in accordance with the calculation to automatically generate the setting message without waiting for the user operation. Alternatively, a command may be input. In this way, all processing is executed on the machine side, so that there is less room for reflecting the intention of the user, but it is possible to further reduce the load on the operator. In addition, various modifications can be made without departing from the spirit of the present invention.
[0084]
【The invention's effect】
As described above in detail, according to the present invention, when the form of the ring network changes, the recognizing means recognizes the change, and, based on the result, a setting message for resetting the APS in response to the change in the network form. The setting message is generated by the generating means, and this setting message is transmitted to each node device by the transmitting means, and the setting of the protection function in the node device is changed by the setting changing means in accordance with the transmitted setting message.
[0085]
Because of this, the setting process of the protection function according to the change of the network form is automated, thereby providing the transmission system, the monitoring control device thereof, and the method of updating the setting of the protection function with the aim of improving the convenience in operation. be able to.
[Brief description of the drawings]
FIG. 1 is a system diagram showing a configuration example of a transmission system according to an embodiment of the present invention.
FIG. 2 is a diagram showing a configuration of nodes 1-1 to 1-n shown in FIG.
FIG. 3 is a schematic diagram showing an APS setting table 6a of FIG. 2;
FIG. 4 is a block diagram showing a configuration of the monitoring control device 3 shown in FIG.
FIG. 5 is a flowchart showing a processing procedure in the transmission system according to the embodiment of the present invention.
FIG. 6 is a view showing an example of a (CAUTION) screen displayed on a display unit 62 in step S3 of FIG. 5;
FIG. 7 is a view showing an example of a Network Alarm Summary Display displayed on the display unit 62.
FIG. 8 is a diagram showing an example of a Partial Network Configuration Setting screen displayed on a display unit 62.
FIG. 9 is a flowchart showing a continuation of the processing procedure of FIG. 5;
FIG. 10 is a flowchart showing a continuation of the processing procedure of FIG. 9;
[Explanation of symbols]
ST-1 to ST-m ... office building
OF: High-speed line
FL: wavelength multiplexing line
ML: Management network
SL… Service line
PL… Protection line
LL: Tributary transmission path
1-1 to 1-n ... nodes
2. Station monitoring device (SSE)
3. Monitoring and control device
4: Router
5 ... Control unit
5a: APS control unit
5b: setting change processing unit
6 ... Storage unit
6a: APS setting table
7 ... Management network interface
10. Transmit / receive module
10-13 ... Transceiver module
31 ~ 3k ... Tributary interface shelf
61 ... Input / output unit
62 ... Display unit
63 Interface unit
64 storage unit
65: Main control unit
65a: recognition processing unit
65b: setting message generation processing unit
65c: Transmission processing unit
65d ... grasp processing unit
65e: Notification processing unit
65f ... instruction reception processing unit
201, 202: Time slot exchange unit

Claims (23)

In a transmission system including a service line that transmits service traffic and a protection line that is a spare resource of the service line,
A plurality of node devices that are arranged via a segment where the service line and the protection line are laid, and form a network that takes one of a full ring and a partial ring depending on the state of the segment,
A monitoring and control device that provides an OAM (Operations, Administration and Maintenance) service to the network;
The network is
A ring-type function that can be operated only in the full ring, and a span-type function in which the operable segment is limited in the partial ring, and any one of the functions is operated in accordance with a failure occurrence mode. A protection function for relieving service traffic from the failure using the protection line,
The monitoring control device,
Recognizing means for recognizing the form of the network based on notification information respectively notified from the plurality of node devices,
A setting message for setting the lockout of the protection function or the release of the lockout for each of the ring-type function and the span-type function is generated for each segment according to the form of the network recognized by the recognition means. Setting message generating means;
Transmitting means for transmitting the setting message generated by the setting message generating means to each of the plurality of node devices,
Each of the plurality of node devices includes:
A transmission system, comprising: a setting change unit that changes a setting of the protection function in the own device for each of the ring-type function and the span-type function according to a setting message transmitted by the transmission unit. The setting message generating means, when the network changes from the full ring to the partial ring as a result of the recognition by the recognition means, a command for locking out the ring-type function in all segments, and a command belonging to the partial ring. The transmission system according to claim 1, wherein a configuration message including a command for locking out the span type function in a segment that does not exist is generated. The setting message generating means generates a setting message including a command for releasing lockout of the protection function in all segments when the network changes from the partial ring to the full ring as a result of recognition by the recognizing means. The transmission system according to claim 1, wherein: When the network changes from a partial ring to a partial ring having a different topology from the partial ring as a result of the recognition by the recognition unit, the setting message generating unit generates a new setting message corresponding to the change in the topology. The transmission system according to claim 1, wherein: The monitoring control device,
Further, grasping means for grasping a failure occurrence mode in the network based on the notification information,
Notifying means for notifying the user of the occurrence mode of the failure grasped by the grasping means;
Instruction receiving means for receiving the user's domain designation instruction made according to the failure occurrence mode notified by the notifying means,
The transmission system according to claim 1, wherein the setting message generating unit generates the setting message for a domain specified via the instruction receiving unit. When a plurality of networks formed by the plurality of node devices are provided,
The recognition means individually recognizes the form for each network,
The setting message generating means generates the setting message individually for each network whose form is recognized by the recognition means,
2. The transmission system according to claim 1, wherein the setting change unit changes the setting of the protection function individually for each network. The monitoring control device,
Further, grasping means for grasping a failure occurrence mode in each of the plurality of networks based on the notification information,
Notifying means for notifying the user of the occurrence mode of the failure grasped by the grasping means for each network;
Instruction receiving means for receiving the user's domain designation instruction made according to the failure occurrence mode for each network notified by the notification means,
7. The transmission system according to claim 6, wherein the setting message generating unit generates the setting message for a domain specified via the instruction receiving unit. Further, the monitoring control device includes a display,
The notifying unit notifies the user of the occurrence of the failure grasped by the grasping unit by displaying the occurrence form of the trouble on the display.
8. The transmission system according to claim 5, wherein the instruction accepting unit accepts a domain designation instruction of the user via a GUI (Graphical User Interface) symbol displayed on the display. 9. The transmission system according to claim 8, wherein the monitoring control device changes a display color of the GUI symbol on the display in accordance with the presence or absence of a failure. A service line for transmitting service traffic, a protection line that is a spare resource of the service line, and a full ring or a partial ring depending on the state of the segment in which the service line and the protection line are arranged via a segment where the service line and the protection line are laid. It has a ring-type function that can operate only in the full ring and a span-type function in which the operable segment is limited in the partial ring. And a plurality of node devices forming a network having a protection function for relieving the service traffic from the failure by using the protection line by operating the function of Operations, a monitoring control device that provides Administration and Maintenance) services,
Recognizing means for recognizing the form of the network based on notification information respectively notified from the plurality of node devices,
A setting message for setting the lockout of the protection function or the release of the lockout for each of the ring-type function and the span-type function is generated for each segment according to the form of the network recognized by the recognition means. Setting message generating means;
A transmission means for transmitting the setting message generated by the setting message generating means to each of the plurality of node devices. The setting message generating means, when the network changes from the full ring to the partial ring as a result of the recognition by the recognition means, a command for locking out the ring-type function in all segments, and a command belonging to the partial ring. The supervisory control device according to claim 10, wherein a setting message including a command for locking out the span type function in a segment that does not exist is generated. The setting message generating means generates a setting message including a command for releasing lockout of the protection function in all segments when the network changes from the partial ring to the full ring as a result of recognition by the recognizing means. The supervisory control device according to claim 10, wherein: When the network changes from a partial ring to a partial ring having a different topology from the partial ring as a result of the recognition by the recognition unit, the setting message generating unit generates a new setting message corresponding to the change in the topology. The supervisory control device according to claim 10, wherein: Further, grasping means for grasping a failure occurrence mode in the network based on the notification information,
Notifying means for notifying the user of the occurrence mode of the failure grasped by the grasping means;
Instruction receiving means for receiving the user's domain designation instruction made according to the failure occurrence mode notified by the notifying means,
11. The monitoring control apparatus according to claim 10, wherein the setting message generating unit generates the setting message for a domain specified via the instruction receiving unit. When the transmission system includes a plurality of networks formed by the plurality of node devices,
The recognition means individually recognizes the form for each network,
The setting message generating means generates the setting message individually for each network whose form is recognized by the recognition means,
The monitoring control apparatus according to claim 10, wherein the setting change unit changes the setting of the protection function individually for each network. Further, grasping means for grasping a failure occurrence mode in each of the plurality of networks based on the notification information,
Notifying means for notifying the user of the occurrence mode of the failure grasped by the grasping means for each network;
Instruction receiving means for receiving the user's domain designation instruction made according to the failure occurrence mode for each network notified by the notification means,
16. The monitoring control device according to claim 15, wherein the setting message generating unit generates the setting message for a domain specified via the instruction receiving unit. In addition, a display is provided
The notifying unit notifies the user of the occurrence of the failure grasped by the grasping unit by displaying the occurrence form of the trouble on the display.
17. The monitoring control apparatus according to claim 14, wherein the instruction receiving unit receives the user's domain designation instruction via a GUI (Graphical User Interface) symbol displayed on the display. 18. The monitoring control device according to claim 17, wherein the display color of the GUI symbol on the display is changed according to the presence or absence of a failure. A service line for transmitting service traffic, a protection line that is a spare resource of the service line, and a full ring or a partial ring depending on the state of the segment in which the service line and the protection line are arranged via a segment where the service line and the protection line are laid. A plurality of node devices forming a network that takes any form, wherein the network has a ring-type function that can operate only in the full ring, and a span in which segments that can operate in the partial ring are limited. The protection function used in a transmission system having a protection function of relieving the service traffic from the failure using the protection line by operating one of the functions according to a failure occurrence mode. A set method of updating the emission function,
A first step of recognizing a form of the network based on notification information respectively notified from the plurality of node devices;
According to the configuration of the network recognized in the first step, a setting message for setting lockout or release of lockout of the protection function for each of the ring-type function and the span-type function for each segment is generated. A second step,
A third step of transmitting the setting message generated in the second step to each of the plurality of node devices;
And a fourth step of changing the setting of the protection function in each of the plurality of node devices for each of the ring-type function and the span-type function in response to the setting message transmitted in the third step. A feature updating method of the protection function. Further, a fifth step of grasping a failure occurrence mode in the network based on the notification information;
A sixth step of notifying the user of the occurrence mode of the failure grasped in the fifth step;
A seventh step of receiving a user's domain designation instruction made according to the failure occurrence mode reported in the sixth step,
20. The method according to claim 19, wherein the second step is a step of generating the setting message for the domain specified in the seventh step. When the transmission system includes a plurality of networks formed by the plurality of node devices,
The first step is a step of individually recognizing the form for each network,
The second step is a step of individually generating the setting message for each network whose form is recognized in the first step,
20. The method according to claim 19, wherein the fourth step is a step of individually changing the setting of the protection function for each network. Further, a fifth step of grasping a failure occurrence mode in each of the plurality of networks based on the notification information,
A sixth step of notifying the user of the occurrence mode of the failure identified in the fifth step for each network;
A seventh step of receiving the user's domain designation instruction made according to the failure occurrence mode for each network notified in the sixth step,
22. The method according to claim 21, wherein the second step is a step of generating the setting message for the domain specified in the seventh step. The sixth step is a step of displaying on the display provided in the transmission system the occurrence mode of the failure grasped in the fifth step to notify the user,
23. The protection function according to claim 20, wherein the seventh step is a step of receiving a domain designation instruction of the user via a GUI (Graphical User Interface) symbol displayed on the display. How to update settings.

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