JP3231977B2 - Spare unit switching controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spare unit switching control device of a transmission apparatus having a plurality of working units and spare units, and more particularly to a quick connection of a working unit to a spare unit in a node having a ring network configuration. The present invention relates to a spare unit switching control device that enables unit switching.

In recent years, the transmission speed has been increased in the communication field, and as a result, even if a short-time failure has occurred in a line, the amount of information lost in that time has become enormous. Therefore, there is a demand for minimizing the loss of information by recovering the failure as soon as possible.

[0003] The present invention is intended to reduce the time required from the occurrence of a failure to the completion of switching when a main signal interruption caused by a unit failure (hardware failure) is restored by switching to a spare unit. is there.

[0004]

2. Description of the Related Art FIG. 9 shows a general ring-shaped network configuration. That is, for example, four nodes (transmission devices) 101 to 104 are connected in a ring by bidirectional links. The configuration of each node is the same, and the configuration of the node 101 will be described as a representative.
d) TSI (T
ime Slot Interchange) 101c, TSI1
01c is connected to an LS (Low Speed) interface 101d. The HS interfaces 101a and 101b are:
It performs interface processing on high-speed signals of SDH (Synchronous Digital Hierarchy) and performs TSI 101c
Performs the exchange of time slots. The LS interface 101d is connected to a PDH (Presiochronous
Performs interface processing with low-speed signals of Digital Hierarchy). The conventional configuration of the LS interface 101d will be described in detail with reference to FIG.

FIG. 10 is a block diagram showing a conventional internal configuration of the LS interface 101d shown in FIG. That is, three main signal units 105 to 107 for interface processing are provided, and a spare unit 108 of the same configuration that is switched and used when a failure occurs in these active devices is provided. The main signal units 105 to 107 and the spare unit 108
It has the function of converting 21 channels of DH C-12 signals (transmission rate of 2.048 Mbps) into SDH STM-0 signals (transmission rate of 25.92 Mbps), and its inverse conversion, and supports network ring configuration. It has a function of monitoring main signals such as C-12 signal and STM-0 signal and outputting an alarm.

The main signal unit control section 109 manages the state of each main signal assigned to each of the main signal units 105 to 107, and also controls the main signal units 105 to 107.
And the provisioning data is sent to the SW control unit 111 via the bus 112. The provisioning data is setting data for performing operation setting for each channel specific to the main signal units 105 to 107. That is, with this provisioning data,
Various control conditions are set for each channel in the unit. The dashed line shown in FIG. 10 indicates the data flow when the spare unit 108 becomes active. The reason for sending the provisioning data to the SW control unit 111 will be described later.

Further, the main signal unit control unit 109 includes:
Main signal units 105 to 107 and spare unit 10
Condition data is input from the bus 8 via the bus 116. That is, in the main signal units 105 to 107 and the backup unit 108, path switches corresponding to the ring configuration of the network are provided for each channel, and the signals arriving via the inner path and the signals arriving via the outer path of the ring are separated. The selection of a path with higher quality is performed voluntarily, but path selection information indicating the selected path name is sent to the main signal unit control unit 109 as condition data. This condition data is also output from the main signal unit control unit 109 as a part of the provisioning data.

[0008] The TL1 control unit 110 is connected to the main signal unit control unit 109. The TL1 control unit 110 terminates the TL1 language which is an interface with the maintenance person, analyzes various commands, and notifies the main signal unit control unit 109 of the setting information.

[0009] The SW control unit 111 is connected to the main signal unit 10.
Failure information is collected from the backup signal units 5 to 107 and the spare unit 108 via the bus 115, and based on the failure information, it is detected that a failure has occurred in any of the main signal units 105 to 107. When the occurrence of a failure is detected, the same data as the provisioning data (including the condition data) set in the main signal unit in which the failure has occurred is read from its own storage space and transferred to the spare unit 108 via the bus 113. I do. After the transfer is completed, the switching signal is output to the main signal units 105 to 107 and the spare unit 108 via the bus 114, and the main signal unit in which the failure has occurred is switched to the spare unit 108.
To switch over. As a result, the spare unit 108
Will continue its operation in place of the failed main signal unit.

FIG. 11 is a block diagram showing the internal configuration of the SW control unit 111. The SW control unit 111 has a processor configuration, and executes a predetermined program,
The remaining functional configurations except for the dual port RAM 111a in the figure are realized. That is, the provisioning data (including the condition data) is transmitted to the main signal unit 1
Dual port RA for each 05-107 and each channel
It is input to M111a. The provisioning data storage unit 111b reads the provisioning data from the dual port RAM 111a according to the timing instruction of the capture control unit 111g, and stores the provisioning data for each unit and each channel. As a result, in principle, the main signal unit 105 is stored in the provisioning data storage unit 111b.
This means that the same data as the provisioning data set in to 107 is always stored. actually,
As described later, there is an exception in the condition data.

The fault information collecting unit 111c receives signals from the main signal units 105 to 107 and the spare unit 108 from the bus 1
15 to collect each fault information. The fault information is obtained by the main signal units 105 to 107 and the spare unit 108 detecting their own hardware faults and signaling them. The failure detection unit 111d detects that a failure has occurred in any of the main signal units 105 to 107 based on the collected failure information. When a failure is detected, the name of the failed main signal unit is notified to the data transfer unit 111e and the switching control unit 111f. Data transfer unit 111e
Stores the provisioning data corresponding to the main signal unit whose name has been notified to the provisioning data storage unit 111.
b and transferred to the spare unit 108 via the bus 113. When the transfer is completed, the data transfer unit 11
1e notifies the switching control unit 111f of the completion of the transfer, and upon receiving the notification, the switching control unit 111f transmits a switching signal for instructing switching from the main signal unit in which the failure has occurred to the spare unit 108 via the bus 114. The main signal unit of occurrence and sends it to the standby unit 108.

The capture control unit 111g has a built-in timer,
The provisioning data storage unit 111b is instructed at the timing of fetching the provisioning data from the dual port RAM 111a, and upon receiving the ending signal of the fetching, instructs the failure information collection unit 111c to start collecting the failure information.

FIG. 12 shows the operation order of the provisioning data storage unit 111b and the failure information collection unit 111c based on the operation instruction of the acquisition control unit 111g, and the related failure detection unit 111d, data transfer unit 111e, and switching control unit 111f. The following shows the operation order of. Hereinafter, description will be made along the steps of the flowchart in the figure.

[S11] The provisioning data storage unit 111b fetches the provisioning data from the dual port RAM 111a based on the operation instruction of the fetch control unit 111g. When the capture is completed, the provisioning data storage unit 111b sends a termination signal to the capture control unit 111g.

[S12] Upon receiving the end signal, the acquisition control unit 111g instructs the failure information collection unit 111c to start collecting failure information. The fault information collecting unit 111c collects fault information in the order of the main signal unit 105, the main signal unit 106, the main signal unit 107, and the backup unit 108.

[S13] Based on the collected fault information,
The failure detection unit 111d determines whether a failure has occurred in the main signal units 105 to 107. When the occurrence of a failure is detected, the process proceeds to step S14, and when not detected, the process proceeds to step S15.

[S14] The data transfer unit 111e transfers the provisioning data to the spare unit 108, and after the transfer is completed, the switching control unit 111f instructs switching from the main signal unit in which the failure has occurred to the spare unit 108.

[S15] The capture controller 111g waits for a predetermined time by a built-in timer, and then proceeds to step S11.

[0019]

SUMMARY OF THE INVENTION Main signal unit 105
Since the signal is cut off from the occurrence of a fault in the unit 107 to the start of the operation of the spare unit 108, it is required to reduce the required time as much as possible.

Incidentally, in the conventional apparatus, the execution of step S11 in FIG. 12 is performed without any change in the provisioning data. However, when the provisioning data is taken in, for example, 4 bytes of provisioning data per channel for 21 channels per unit and 3 units are taken in, about 2 m
requires s. Provisioning data storage unit 111
Since the previously stored provisioning data is stored in b, this need not be performed unless there is a change. Therefore, there is room for improvement regarding the acquisition of the provisioning data in step S11 in FIG.

Further, the waiting for a predetermined time by the execution of step S15 in FIG. 12 also hinders the shortening of the signal interruption state time. Further, in the conventional device, when the occurrence of a failure is detected, the data transfer unit 111e transfers the provisioning data to the spare unit 108, and after the transfer is completed,
The switching control unit 111f instructs switching from the main signal unit in which a failure has occurred to the spare unit 108. But,
The time required for the data transfer unit 111e to transfer the provisioning data to the spare unit 108 is, for example, 0.7 ms, whereas the time required for switching from the failed main signal unit to the spare unit 108 is:
For example, 4 ms due to the intervening mechanical operation of the relay. Therefore, even if the switching to the spare unit 108 is started without waiting for the completion of the transfer of the provisioning data, it seems that there is no problem at all. Here also, there is room for improvement that enables the time of the signal interruption state to be reduced.

Further, conventionally, the main signal unit control unit 10
9, condition data is input from the main signal units 105 to 107 and the spare unit 108, and is sent to the SW control unit 111 as a part of the provisioning data. There is a possibility that a situation different from the condition data (path selection information) in the main signal unit in which a failure has occurred may occur.

That is, as shown in FIG. 13, for example, the path # 1 is selected in the main signal unit 105, and the path selection information is sent as condition data to the SW control unit 111 via the main signal unit control unit 109,
Suppose that it was memorized. Next, in the main signal unit 105, a change in the path setting occurs at time T1. For this reason, for example, condition data indicating a new path # 2 is sent to the main signal unit control unit 109, and immediately after that, a failure 121 occurs in the main signal unit 105. In this case, in the SW control unit 111, the new path # 2
Is not received, the path # 1 different from the actual one is transferred to the spare unit 108 together with the provisioning data, and the spare unit 1
08 causes a problem that the operation of the main signal unit 105 cannot be continued properly.

The present invention has been made in view of such a point, and a spare unit switching control device for reducing the time required from the occurrence of a failure in a main signal unit to the start of the operation of a spare unit. The first object is to provide

A second aspect of the present invention is to provide a spare unit switching control device in which the path selection information sent to the spare unit upon occurrence of a failure always coincides with the path selection information of the main signal unit in which the failure has occurred. Aim.

[0026]

According to the present invention, in order to achieve the first object, as shown in FIG. 1, setting data relating to unit operations to be set in a plurality of active units 1 are respectively stored in these units. A setting data transmitting means 2 for periodically transmitting the setting data by adding a change display signal indicating whether or not the setting data has changed, and receiving the setting data transmitted from the setting data transmitting means 2 and receiving the received setting data. Reception determining means 3 for extracting a change display signal added to the setting data to determine whether there is a change in the setting data, and receiving the signal only when the receiving determining means 3 determines that the setting data has changed. Setting data storage and updating means 4 for storing and updating the set data, and a plurality of active units 1
And a data transfer means 6 for reading out the same data as the setting data set in the active unit in which the fault has occurred from the setting data storage / updating means 4 and transferring the same to the spare unit 5. , A spare unit switching control device is provided.

In order to achieve the second object,
As shown in FIG. 2, a plurality of active units 7 which periodically transmit fault information together with path selection information indicating which of the plurality of paths receives a signal.
Receiving the path selection information sent from the plurality of working units 7 and updating the path selection information storage and updating means 8 for storing and updating the failure information sent from the plurality of working units 7; Based on the failure information, the failure detection means 9 for detecting that a failure has occurred in any of the plurality of working units 7 and the setting data relating to the unit operation to be set for each of the plurality of working units 7 are periodically transmitted. The setting data sending means 10 sends the setting data sent from the setting data sending means 10 to the setting data storage updating means 11 for storing and updating the setting data. The same data as the setting data set in the active unit in which the fault has occurred is read out from the setting data storage and updating means 11 and the active data in the occurrence of the fault A data transfer means 13 for transferring read path selection information corresponding to the knit from the path selection information storing and updating means 8 to the spare unit 12, spare unit switching control device, characterized in that it comprises is provided.

In the configuration shown in FIG. 1, a spare unit 5 is provided for a plurality of working units 1, and when a failure occurs in any of the plurality of working units 1, it replaces the working unit in which the failure has occurred. Spare unit 5
Is activated. The setting data relating to the unit operation is sent from the setting data sending means 2 to each of the plurality of working units 1 and is set in each working unit.

The setting data sending means 2 adds a change display signal indicating whether or not the setting data has been changed to the setting data and sends it to the reception judging means 3 periodically. The reception judging means 3 receives the setting data sent from the setting data sending means 2, and extracts a change display signal added to the received setting data. Only when the extracted change display signal indicates that a change has occurred in the setting data, the setting data storing and updating means 4 stores and updates the setting data received by the reception determining means 3. That is, if no change has occurred in the setting data, the setting data storing and updating means 4 determines that the operation of taking in the setting data transmitted this time is useless and does not perform the storage update. The setting data storage and updating means 4 stores setting data for each unit of the plurality of working units 1.
In this way, the same data as the setting data set in each of the plurality of working units 1 is stored in the setting data storage and updating means 4.

When a failure occurs in any of the plurality of working units 1, the data transfer means 6 sends the same data as the setting data set in the working unit in which the failure occurred from the setting data storage / update means 4. It is read out and transferred to the spare unit 5. The spare unit 5 sets the transferred setting data to itself, and continues its operation in place of the failed active unit.

As described above, the setting data storage and updating means 4
However, as long as the setting data has not been changed, the storage update of the setting data is omitted, thereby reducing the time required from the occurrence of a failure in the working unit to the start of the operation of the spare unit. Can be.

In the configuration shown in FIG. 2, a spare unit 12 is provided for a plurality of working units 7, and if a failure occurs in any of the plurality of working units 7, the working unit in which the failure has occurred. , The spare unit 12 operates. The setting data relating to the unit operation is sent from the setting data sending means 10 to each of the plurality of working units 7, and is set in each working unit.

The plurality of working units 7 periodically transmit the failure information together with the path selection information. The path selection information storing / updating means 8 has a storage location for each of the plurality of working units 7, receives the path selection information sent from the plurality of working units 7, and updates the storage. Thus, the latest path selection information in the plurality of working units 7 is stored in the path selection information storage / update means 8.

The failure detecting means 9 comprises a plurality of active units 7
Receives the fault information sent from the respective units, and detects that one of the plurality of working units 7 has a fault based on the fault information.

On the other hand, the setting data transmitting means 10 periodically transmits the setting data to the setting data storing / updating means 11. The setting data storing and updating means 11 has a storage location for each unit of the plurality of working units 7, receives the setting data sent from the setting data sending means 10, and stores and updates the setting data. Thus, the setting data storage and updating means 11 includes:
The same data as the setting data set in each of the plurality of working units 7 is stored.

When a failure is detected by the failure detecting means 9, the data transfer means 13 reads out from the setting data storage / update means 11 the same data as the setting data set in the active unit in which the failure has occurred. The path selection information transmitted and stored from the active unit in which the failure has occurred before the occurrence of the failure is read out from the path selection information storage / updating means 8 and transferred to the spare unit 12. The spare unit 12 sets the transferred setting data and path selection information to itself, and continues its operation in place of the active unit in which a failure has occurred.

As described above, the path selection information is sent together with the failure information, and the path selection information storage / updating means 8 stores the latest path selection information in the plurality of active units 7, thereby causing a failure. As a result, the path selection information sent to the spare unit 12 can always be matched with the path selection information in the active unit in which a failure has occurred.

[0038]

Embodiments of the present invention will be described below with reference to the drawings. 3 to 5 are block diagrams showing a specific configuration of the embodiment of the present invention. FIG. 3 shows LS
FIG. 4 shows an internal configuration of the SW control unit 27 shown in FIG. 3, and FIG. 5 shows an internal configuration of the main signal unit 23 shown in FIG.

Here, the working unit 1 in FIG.
The setting data transmitting means 2 corresponds to the main signal units 23 to 25 in FIG.
2, the reception determining means 3 is a dual port RAM 2 shown in FIG.
7a and the setting change detection unit 27b, the setting data storage / updating unit 4 includes the provisioning data storage unit 27c of FIG.
The spare unit 5 corresponds to the spare unit 26 in FIG. 3, and the data transfer means 6 corresponds to the edit transfer unit 27i in FIG.

The plurality of working units 7 in FIG.
4 corresponds to the main signal units 23 to 25 in FIG. 3. Similarly, the path selection information storage / update means 8 stores the fault detection information in the monitoring information collection unit 27d, the information separation unit 27e, and the condition data storage unit 27h in FIG. The means 9 comprises the monitoring information collecting unit 27d, the information separating unit 27e, and the fault detecting unit 2 of FIG.
7f, the setting data sending means 10 is in the main signal unit control section 22 in FIG. 3, and the setting data storage / updating means 11 is in the dual port RAM 27a and the setting change detecting section 27 in FIG.
b, the spare unit 12 becomes the spare unit 26 of FIG.
The data transfer unit 13 corresponds to the edit transfer unit 27i in FIG.

First, in FIG. 3, the TL1 control unit 21
Terminates the TL1 language, which is an interface with the maintenance person, analyzes various commands, and executes the main signal unit control unit 22.
To notify the setting information. Main signal unit controller 2
2 manages the state of each main signal assigned to each of the main signal units 23 to 25, and
To 25 and the SW control unit 27 via the bus 28 together with the change indication signal. The provisioning data is setting data for setting operation of each channel specific to the unit for the main signal units 23 to 25. That is, the control data sets various control conditions for each channel in the unit. The broken line shown in FIG. 3 shows the flow of data when the spare unit 26 becomes active.

The main signal unit control section 22 has a processor configuration, and realizes the following functions by executing a predetermined program. That is, the provisioning data is stored in a predetermined storage location for each unit and each channel, and the storage is updated when a change occurs in the provisioning data. In addition, a counter function is provided, and when a change occurs in the provisioning data, it is counted up and the count value is stored in the predetermined storage location. Then, periodically, the count value and the provisioning data stored in the predetermined storage location are read, and the count value is used as a change display signal,
Outputs the data added to the provisioning data.

FIG. 6 shows a transmission frame of the provisioning data output from the main signal unit control unit 22. That is, the sections 29 to 31 include the main signal unit 23
These are the locations where the provisioning data are to be set to ２５25, respectively, and a transmission section 32 for a 1-byte change display signal is provided at the beginning of these sections 29 to 31. The above-mentioned count value is mounted on this transmission section 32.
Each of the sections 29 to 31 has the same internal configuration, and has an internal configuration for 21 channels in which 4 bytes are allocated to each channel.

Next, the SW control unit 27 will be described with reference to FIG. The SW control unit 27 has a processor configuration, and executes a predetermined program so that the dual port R
The function of each unit other than the AM 27a is realized.

The provisioning data having the frame configuration shown in FIG. 6 output from the main signal unit control unit 22 is temporarily stored in the dual port RAM 27a. The setting change detection unit 27b reads it out according to an instruction from the capture control unit 27j. Then, the setting change detection unit 27b
The count value described in the first byte is extracted.
The setting change detection unit 27b stores the count value extracted last time, and compares the count value extracted this time with the count value extracted last time. As a result, only when the count value extracted this time is counted up by one, it is determined that the received provisioning data is changed. That is, if the count value extracted this time is the same as the count value extracted last time, it is determined that the count-up in the main signal unit control unit 22 has not been performed and, therefore, no change has occurred in the provisioning data. Is determined.

When the setting change detection unit 27b determines that the provisioning data has changed, the setting change detection unit 27b outputs the provisioning data received by the dual port RAM 27a to the provisioning data storage unit 27c. Then, after the output is completed, an end signal is sent to the capture control unit 27j. On the other hand, when the setting change detection unit 27b determines that the provisioning data has not changed,
Without outputting the provisioning data, an end signal is immediately sent to the acquisition control unit 27j. Finally, the setting change detection unit 27b stores the count value extracted this time.

If the count value extracted this time is a value that has been counted up by two or more from the count value extracted last time, or has become a value that has been counted down, the main signal unit control unit 22 In, it is estimated that there is an abnormality in a predetermined storage location storing the count value and the provisioning data, and therefore, it is also assumed that the provisioning data is also unreliable data. In such a case, naturally, the provisioning data is not output to the provisioning data storage unit 27c based on the above determination, so that the provisioning data storage unit 27c can avoid fetching erroneous provisioning data. In such a case, the count value extracted this time is stored and waits for the next transmission of the provisioning data.

The provisioning data storage unit 27c
The provisioning data is stored for each of the main signal units 23 to 25. These provisioning data are the same as the provisioning data set in the main signal units 23 to 25, respectively.

The capture control unit 27j includes the setting change detection unit 2
When receiving the end signal from 7b, it instructs the monitoring information collecting unit 27d to start collecting monitoring information. The monitoring information collecting unit 27d is connected to the main signal unit 23 via the bus 33.
25 and the spare unit 26 are connected, and the monitoring information collecting unit 27d sequentially collects monitoring information from the main signal units 23 to 25 and the spare unit 26 in accordance with a start instruction from the capture control unit 27j. The monitoring information will be described while explaining the internal configuration of the main signal unit with reference to FIG.

FIG. 5 is a block diagram showing the internal configuration of the main signal unit 23. Since the main signal units 24 and 25 and the spare unit 26 have the same configuration as the main signal unit 23, the main signal unit 23 will be described as a representative.

The signal conversion unit 23a is provided with a PDH on the public line side.
Of the C-12 signal of 21 channels of SSI of SDH on the TSI side
The signal is converted into a TM-0 signal and the inverse conversion is performed. The main signal unit 23 has a path switch (not shown) for each channel corresponding to the ring configuration of the network, and the path switch control unit 23b controls the signal arriving via the inner path of the ring and the outer path. To select the path with better quality compared to the signal arriving through
The path switch is switched according to the selection. Then, the path switch control unit 23b sends the selected path name to the transfer unit 23d as condition data. The monitoring unit 23c monitors a hardware failure occurring in the main signal unit 23, and when there is a failure, sends the failure information to the transfer unit 23d. Upon receiving a request from the monitoring information collecting unit 27d (FIG. 4), the transfer unit 23d mounts the condition data and the failure information in a monitoring information frame and sends the monitoring data to the monitoring information collecting unit 27d as monitoring information.

FIG. 7 shows the structure of the monitoring information frame. That is, the monitoring information frame is composed of 8 bits,
The failure information is loaded in 2 bits of sections 36 and 39, and section 3
8 with the condition data in 4 bits,
7, two types of condition data type information are mounted.

Returning to FIG. 5, the working / standby switching unit 23e
Receives a switching signal from a later-described switching control unit 27g in FIG. 4 via the bus 34 to operate the relay. If the own unit is designated, the relay is disconnected in the active mode, and the standby mode is switched to the active mode. The provisioning data setting unit 23f receives the provisioning data for the own unit from the main signal unit control unit 22 via the bus 28 if the own unit is in use and sets the provisioning data for the own unit. The provisioning data (including the condition data) is received from the later-described editing transfer unit 27i of FIG. 4 via the bus 35 and set in the own unit.

Returning to FIG. 4, the monitoring information collecting unit 27d
The information separating unit 27e separates the collected monitoring information from the main signal units 23 to 25 and the spare unit 26 into fault information and condition data sequentially, sends the fault information to the fault detecting unit 27f, and stores the condition data in the condition data. Part 27h. The condition data storage unit 27h has a storage location for each of the main signal units 23 to 25, stores the transmitted condition data for each unit, and updates the condition data every time new condition data arrives. . Therefore, information indicating the latest path selection state of the main signal units 23 to 25 is always stored in the condition data storage unit 27h.

Upon receiving the failure information, the failure detecting unit 27f specifies the main signal unit in which the failure has occurred, and notifies the switching control unit 27g and the edit transfer unit 27i. First, the switching control unit 27g outputs a switching signal, thereby starting a relay operation for disconnecting the faulty main signal unit and switching the spare unit 26 to the active state. At the same time, the edit transfer unit 27i reads the same data as the provisioning data set in the failed main signal unit from the provisioning data storage unit 27c, and reads the latest path of the failed main signal unit. The condition data indicating the selected state is read from the condition data storage unit 27h. Then, both are edited (the frame format is recreated) and output to the spare unit 26.

The time required for the relay operation for switching from the main signal unit in which a fault has occurred to the spare unit 26 is sufficiently longer than the time required for setting the provisioning data (including the condition data) in the spare unit 26. The setting of the provisioning data is completed before the switching relay operation is completed. This is the same even when the number of parable channels is larger.

The operation procedure of the SW control unit 27 described above will be described with reference to the flowchart of FIG. Less than,
Description will be made along the steps in the figure. [S1] Initialization of each storage unit and the like inside the SW control unit 27 is performed.

[S2] The setting change detector 27b determines whether or not the provisioning data has changed. [S3] If the result of determination in step S2 is that there is a change in the provisioning data, the flow proceeds to step S4, and if not, the flow proceeds to step S5.

[S4] Provisioning data storage unit 2
7c stores and updates the sent provisioning data. As described above, if there is no change in the provisioning data, the storage processing of the provisioning data is not performed, so that the time required from the occurrence of a failure in the main signal unit to the start of the operation of the spare unit can be reduced.

[S5] The monitoring information collecting unit 27d sequentially collects the condition data together with the fault information as the monitoring information from the main signal units 23 to 25 and the spare unit 26.

Since this condition data, that is, path selection information, is directly collected in the SW control unit 27 together with the failure information, the path selection sent to the spare unit upon occurrence of the failure is combined with execution of steps S7 and S9 described later. The information can always be made consistent with the path selection information in the main signal unit in which a failure has occurred.

[S6] The failure detector 27f determines whether or not a failure has occurred in any of the main signal units 23 to 25. If a failure has occurred, the process proceeds to step S7. Return to S2.

As described above, if no failure has occurred,
Immediately after returning to step S2, it is determined whether or not the provisioning data has been changed. Therefore, unlike the related art, since the standby for a predetermined time (step S15 in FIG. 12) is not performed, the time required from the occurrence of a failure in the main signal unit to the start of the operation of the spare unit is also reduced. be able to.

[S7] The editing transfer unit 27i performs editing for storing the provisioning data and the condition data in the same transmission frame. [S8] The switching control unit 27g outputs a switching signal.

[S9] The editing and transferring unit 27i determines in step S
The data edited in step 7 is transferred to the spare unit 26. As described above, the switching control unit 27g outputs the switching signal before the transfer of the provisioning data or the like by the edit transfer unit 27i. Therefore, the time required for transferring provisioning data and the like is eliminated from the conventional time required from the occurrence of a failure in the main signal unit to the start of operation of the spare unit. It is possible to reduce the time required from when the standby unit starts operating.

In the above embodiment, one spare unit is provided for three main signal units.
The present invention is generally applicable to a transmission apparatus having m (1 ≦ m <N) spare units for N main signal units.

[0067]

As described above, according to the present invention, if there is no change in the provisioning data, the storage processing of the provisioning data is not performed in the SW control unit. Also, if the occurrence of a fault in the main signal unit is not detected after collecting the fault information,
Without waiting for a predetermined time (step S15 in FIG. 12),
Immediately, the provisioning data acquisition processing (including determination of the presence or absence of a change) is started. Further, when a failure occurs in the main signal unit, a relay switching signal is output to the main signal unit and the spare unit in which the failure has occurred before transferring provisioning data or the like to the spare unit. This makes it possible to reduce the time required from the occurrence of a failure in the main signal unit to the start of the operation of the spare unit.

In addition, path selection information (condition data) is collected in advance in the SW control section together with the failure information in advance, and when a failure occurs in any of the main signal units, this path selection information is stored together with the provisioning data. Transferred to the spare unit. This makes it possible to always match the path selection information sent to the spare unit with the occurrence of the failure with the path selection information in the main signal unit in which the failure has occurred.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a first principle of the present invention.

FIG. 2 is a diagram illustrating a second principle of the present invention.

FIG. 3 is a configuration diagram of an LS interface of the present invention.

FIG. 4 is an internal configuration diagram of a SW control unit of the present invention.

FIG. 5 is an internal configuration diagram of a main signal unit of the present invention.

FIG. 6 is a diagram illustrating a transmission frame of provisioning data according to the present invention.

FIG. 7 is a configuration diagram of a monitoring information frame according to the present invention.

FIG. 8 is a flowchart of the operation of the SW control unit of the present invention.

FIG. 9 is a configuration diagram of a network.

FIG. 10 is a configuration diagram of a conventional LS interface.

FIG. 11 is an internal configuration diagram of a conventional SW control unit.

FIG. 12 is a flowchart showing an operation procedure in a conventional SW control unit.

FIG. 13 is a diagram illustrating a conventional condition data transfer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plurality of working units 2 Setting data sending means 3 Reception judgment means 4 Setting data storage / updating means 5 Spare unit 6 Data transfer means 7 Plurality of working units 8 Path selection information storage / updating means 9 Failure detecting means 10 Setting data sending means 11 Setting Data storage and updating means 12 Spare unit 13 Data transfer means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-282510 (JP, A) JP-A-6-259271 (JP, A) JP-A-5-20237 (JP, A) JP-A-63-1988 131636 (JP, A) JP-A-6-169323 (JP, A) JP-A-3-89654 (JP, A) JP-A-1-157649 (JP, A) JP-A-4-150133 (JP, A) JP-A-63-209245 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04L 12/42 H04L 12/56 H04L 29/14 H04M 3/22 H04Q 3/545

Claims (2)

(57) [Claims] 1. A plurality of working units and spare units
In the spare unit switching control device of the transmission device equipped with
Te, units to be set to a plurality of working units
Setting data for periodically sending setting data related to operation
Sending means for receiving the setting data sent from the setting data sending means.
And a setting data storage updating unit for storing and updating, and a failure occurs in any of the plurality of working units.
Was set to the active unit where this failure occurred
The same data as the setting data is stored and updated.
Data read from the means and transferred to the spare unit
The transfer unit and the failure of any of the plurality of working units
Backup unit in place of the active unit
In order to operate the unit, the data transfer means
Before the end of the transmission,
Switching control means for causing the spare unit to start switching operation
And a spare unit switching control device. 2. A plurality of working units and spare units.
In the spare unit switching control device of the transmission device equipped with
Te, fault information, signals from any path of the plurality of paths
Periodically with path selection information indicating whether or not to receive
A plurality of working units to be transmitted and transmitted, and respective path selection information transmitted from the plurality of working units.
Path selection information storage updating means for receiving and updating the storage
And the respective fault information sent from the plurality of working units.
Based on the fault information, and
Failure to detect that one of the
Harm detection means and a unit to be set for each of the plurality of working units.
To the setting data related to
Add a change indication signal to indicate whether a change has occurred
A setting data sending means for sending the setting data periodically; and a setting data sending means for receiving the setting data sent from the setting data sending means.
At the same time as the
Extract the change display signal to determine whether the setting data has changed
And the setting data is changed by the receiving judgment means.
Only when it is determined that the
A setting data storing / updating unit for updating the memory, and when a failure is detected by the failure detecting unit,
Setting data set for the active unit in which the error occurred
The same data as the data from the setting data storage / update means.
And respond to the faulty working unit.
Read path selection information from the path selection information storage / update means.
A data transfer unit that reads out and transfers the data to the spare unit ;
Use a spare unit in place of the failed active unit.
End of transfer by the data transfer means to operate
Before the faulty working unit and the spare unit
A switching control means for causing the switching unit to start a switching operation .