CN100362758C - Inter-board channel protection device and method - Google Patents

Abstract

The invention discloses an inter-board channel protection device, which is used in a wavelength division multiplexing system. The device includes: main and standby boards arranged on different board as a backup service channel single board; SCCs set on each subrack, one of the SCCs is the master SCC, and the rest are slave SCCs. The master SCC is used to save the channel protection configuration between the master boards. The management configuration of the single board on the subrack; the slave SCC is used to save the channel protection configuration between the slave boards, and the management configuration of the single board of the subrack where the slave SCC is located; the master SCC and the slave SCC perform cross-subrack Communication, and control the switching operation of the active and standby single boards according to the status of the active and standby single boards or the local switching request to realize inter-board channel protection. In addition, the invention also discloses a corresponding protection method for the channel between boards. The present invention can reduce the equipment cost because it can realize single-board protection across subracks.

Description

Inter-board channel protection device and method

technical field

The invention relates to the technical field of optical communication, and more specifically, the invention relates to an inter-board channel protection device and method applied in a wavelength division multiplexing system.

Background technique

With the rapid development of WDM (Wavelength Division Multiplexing) technology and the doubling of the transmission rate, the security and reliability of the transmission channel has become a factor that has to be considered in the development of the network.

Fig. 1 is a technical solution for channel protection between boards in a single subrack in the prior art. The boards supported by the main controller for inter-board channel protection include an OCU (Optical Conversion Unit) board and an Optical Transponder Unit (OTU) board. As shown in the figure, at the sending end, the client-side signal is divided into two paths through the coupler, which are sent to two single boards respectively. The two optical signals sent by the two single boards are sent to the receiving end through different routes. At the receiving end, the two optical signals enter two single boards respectively, and the system control and communication unit (SCC, System Communication & Control), commonly known as the main control board, controls the communication between the two single boards according to the signal quality reported by the two single boards. Client lasers, the selected client-side lasers are turned on, and the unselected client-side lasers are turned off. The optical signals on the client side of the two boards are selected and sent all the way to the client side. Under normal circumstances, select the optical signal of the active board. Refer to ITU-T G.841 for the processing of external commands and local switching conditions of signal quality.

At present, as the equipment supports more and more services and the protection system becomes more and more complex, the number of boards required by a single network element far exceeds the maximum number of boards that can be accommodated by a single subrack. frame to form a complete network element. In some applications, due to cost reduction or external condition constraints, services carried on boards on multiple different subracks need to be protected from each other.

In the above technical solution, the main control board and the main and backup OCU/OTU single boards must be on the same subrack, and the use is limited by hardware conditions. In some cases, in order to realize channel protection, a new subrack has to be specially added for this purpose, which increases the cost.

In addition, generally only one main control board is installed on a subrack for single-board control. Since the protection switching action in the above technical solution requires the main control board to participate in the control, if the main control board is damaged, the protection switching implemented on the subrack cannot Completed normally.

Contents of the invention

The technical problem solved by the present invention is to provide a low-cost inter-board channel protection device and method, which can realize inter-board channel protection across subracks, thereby canceling the need for inter-board channel protection to protect a single board. The limit of one subrack allows more flexible protection configurations, and reduces the number of subracks required for inter-board channel protection, which can further reduce costs.

In order to solve the above-mentioned problems, the inter-board channel protection device of the present invention includes:

The main and standby single boards arranged on different subracks, wherein the active single board is used as the main service channel single board, and the standby single board is used as the backup service channel single board;

System control and communication units arranged on each subrack, one of the system control and communication units is used as the main system control and communication unit, and the rest are used as slave system control and communication units, and the main system control and communication unit is used to save The master inter-board channel protection configuration is the management configuration of the single board of the subrack where the master system control and communication unit is located; the slave system control and communication unit is used to save the slave inter-board channel protection configuration, and the slave system control and communication unit The management configuration of the single board of the subrack; the main system control and communication unit communicates with the slave system control and communication unit across subracks, and controls the main and standby single boards to perform switching operations according to the status of the main and standby single boards or local switching requests To achieve channel protection between boards.

Wherein, the master system control and communication unit and the slave system control and communication unit communicate across subracks through their respective control command agents, and control the master and standby boards to perform corresponding switching operations.

Wherein, the control command agent of the system control and communication unit includes:

The monitoring transceiver module is used to monitor and receive control commands or command response information for cross-subrack operations sent by other subrack system control and communication units, and send the control commands or command response information to the system control and communication of this subrack unit processing;

The operation transceiver module is used to receive the control command or command response information for cross-subrack operation sent by the subrack system control and communication unit, and send the control command or command response information to the corresponding subrack.

Wherein, the control command agent also includes:

The command processing module is used to check the legality of the control commands for cross-subrack operation received by the monitoring transceiver module and received by other subrack system control and communication units, and set the control command identification record and timeout waiting time after the check is passed , sending the control command to the system control and communication unit of the subrack for processing; or

Check the validity of the control commands for operating other subracks sent by the system control and communication unit of this subrack, and send the control commands for operating other subracks to the corresponding subracks after the check is passed.

Wherein, the slave system control and communication unit is also used as a backup master system control and communication unit, which is transferred to the master system control and communication unit when the original master system control and communication unit fails, and the original master system control and communication unit is transferred to the slave system Control and communication unit.

Wherein, the channel protection configuration between the main boards includes: setting the main and standby SCC protection pair parameters, setting the protection mode parameters, setting the recovery mode/recovery time parameters, setting the main and standby single board parameters, and setting the switching enable switch parameters for signal degradation events ;

The channel protection configuration between the slave boards includes: setting the parameters of the main and backup SCC protection pairs, setting the parameters of the protection mode, setting the parameters of the main control system and the communication unit, and setting the parameters of the main and backup single boards.

Wherein, the main single board and the main system control and communication unit are arranged on the same subrack.

Correspondingly, the inter-board channel protection method of the present invention, the steps:

a. Set the main and standby boards distributed on different subracks;

b. Set up system control and communication units distributed on each subrack, and designate one of the system control and communication units as the main system control and communication unit, and the rest as slave system control and communication units, and control the main system The control and communication unit performs channel protection configuration between the main boards, configures the channel protection between the slave boards for the control and communication unit of the slave system, and performs management configuration for the single board of the subrack;

c. According to the status of the main and standby single boards or local switching request, the master system control and communication unit communicates with the slave system control and communication unit across subracks, and controls the main and standby single boards to perform switching operations to realize inter-board channel protection.

Wherein, in step c, the master system control and communication unit and the slave system control and communication unit communicate across subracks through their respective control command agents, and control the master and standby boards to perform corresponding switching operations.

Among them, the control command agent performs the following steps to control the switching operation:

c1. Monitor and receive control commands or command response information for cross-subrack operations sent by other subrack system control and communication units, and send the control commands or command response information to the system control and communication unit of this subrack for processing; or

c2. Receive the control command or command response information for cross-subrack operation sent by the subrack system control and communication unit, and send the control command or command response information to the corresponding subrack.

Wherein, step c1 also includes:

Check the legitimacy of the received control commands for cross-subrack operation from other subrack system control and communication units, and set the control command identification record and timeout waiting time after the check is passed, and send the control command to the subrack The rack's system control and communication unit processing;

Step c2 also includes:

Check the validity of the control commands for operating other subracks sent by the system control and communication unit of this subrack, and send the control commands for operating other subracks to the corresponding subracks after the check is passed.

Additionally, include:

The slave system control and communication unit is used as a backup master system control and communication unit, and when the original master system control and communication unit fails, it is used as the master system control and communication unit, and the original master system control and communication unit is used as the slave master system control and communication unit unit and serves as a backup for the main system control and communication unit.

In addition, the channel protection configuration between the active and active boards described in step b includes: setting the active and standby SCC protection pair parameters, setting the protection mode parameters, setting the recovery mode/recovery time parameters, setting the active and standby board parameters, and setting the signal degradation event switching enable switch parameters;

The channel protection configuration between the slave boards includes: setting the parameters of the main and backup SCC protection pairs, setting the parameters of the protection mode, setting the parameters of the main control system and the communication unit, and setting the parameters of the main and backup single boards.

In addition, in step b, the main system control and communication unit and the main single board are arranged on the same subrack.

Wherein, the local switching requests are arranged in order of priority from high to low, including: clear, lock, force, signal failure, signal degradation, and manual; high priority switching requests can preempt low priority switching requests, preempted switching The request is no longer reserved. When the high-priority switching request fails or is preempted by a higher priority, the switching is performed according to the current switching request.

Compared with the prior art, the present invention has the following beneficial effects:

First of all, the present invention sets the master SCC and the slave SCC, uses the master SCC to judge the master-standby switchover, and controls the corresponding slave SCC to protect the master-standby single board, so as to realize the inter-board channel protection across subracks, and cancel the protection of the single board. Must be limited to one subrack, allowing for more flexible protection configurations;

Secondly, the present invention can reduce the number of required subracks and reduce the cost of equipment because the inter-board channel protection is across subracks;

Thirdly, the present invention also utilizes the secondary SCC as the backup SCC, which can avoid the loss caused by the failure of a single SCC.

Description of drawings

Fig. 1 is a working schematic diagram of channel protection between boards in the prior art;

Fig. 2 is the composition block diagram of SCC control order agent module of the present invention;

Fig. 3 is a schematic diagram of the working principle of the SCC control command proxy module of the present invention;

Fig. 4 is the internal message processing schematic diagram of SCC control command agent module of the present invention;

Fig. 5 is a schematic diagram of the working principle of the SCC realizing inter-board channel protection in the present invention;

Fig. 6 is a flow chart of the method for protecting the channel between boards of the present invention;

Fig. 7 is a schematic diagram of a specific embodiment of the method for protecting the inter-board channel of the present invention.

Detailed ways

The inter-board channel protection method and device of the present invention realize the single-board control across sub-racks by expanding the existing inter-sub-rack communication technology, thereby allowing mutually protected single boards to be located on different sub-racks, reducing the time required for inter-board channel protection. The number of subracks is required to reduce the dependence of the network configuration of protection switching on hardware.

The inter-board channel protection device of the present invention mainly includes:

The main and standby boards are set on different subracks, where the main board is used as the main service channel board, and the backup board is used as the backup service channel board. Any subrack, so it is convenient for network designers to plan, so that the configuration of the protection board is not limited by hardware conditions, and the purpose of saving subracks is achieved. In addition, the main and standby boards can adopt different protection methods according to the protection requirements, such as 1+1 or 1:1 or 1:N, etc. If the mode is 1:N, the main board can be set on a subrack, N A spare board can be set on one or more other subracks.

A system control and communication unit (SCC, System Communication & Control) is arranged on each subrack, one of the SCCs is used as a master SCC, and the rest are used as slave SCCs, and the master SCC and slave SCCs communicate across subracks, and Control the active and standby single boards to perform corresponding switching operations according to the status of the active and standby single boards or the local switching request to realize inter-board channel protection.

In the present invention, as in the prior art, each subrack has an independent SCC for managing and can only directly manage the boards of the subrack. Conversely, the boards on a subrack can only be directly managed by the SCC on the subrack.

In addition, the present invention also designates one of the SCCs as the master SCC, and the rest as slave SCCs, wherein the slave SCC can only directly manage the boards of the subrack where it is located, while the master SCC can only directly manage the boards of the subrack where it is located. The single board can also manage the single boards on other subracks through the slave SCC across the subracks. The main SCC saves the relevant status of the main and standby single boards, and can perform corresponding switching operations according to the local switching conditions.

Specifically, the above-mentioned statuses of the active and standby single boards mainly refer to: laser power-on status, working status of the active and standby boards, switching status, and the like. Under normal circumstances, select the light of the main board.

The local switching condition refers to a switching condition input from the outside or enforced according to signal quality. The processing of external commands and local switching conditions of signal quality can be realized by referring to G.841 of ITU-T. Specifically, a high-priority switching request may preempt a low-priority switching request. And the preempted switching request is no longer reserved. When a high-priority switching request fails or is preempted by a higher priority, switching is performed according to the current switching request. The following instructions are as follows according to the priority of the local switching request from high to low:

Clear: Clear all the following switching requests. Including waiting for recovery.

Lock: it can only work on the main board.

Forced: Forced to switch to the specified board. In non-recovery mode, it can be forced to switch to the main board or to the standby board. In recovery mode, it can only be forced to switch to the standby board.

Signal failure: According to the signal quality and the condition of key components on the board, each board generates a signal failure switching request.

Signal degradation: According to the signal quality, each board generates a signal degradation switching request.

Manual: Manually switch to the specified board. In non-recovery mode, you can manually switch to the active board or to the standby board. In recovery mode, you can only manually switch to the standby board.

Waiting for recovery: The state of waiting for recovery means that when the board is working in the recovery mode and the signal of the standby board is used, if the signals of the main board and the standby board are normal, counting is performed, and the state at this time is the state of waiting for recovery . When the set recovery time is counted, switch to the active board.

No request: When the recovery mode is non-recovery mode, if no external command is issued, or other external commands are preempted by the clear command, and the active and standby boards are normal, the status is no request. When the recovery mode is the recovery mode, if no external command is issued, or other external commands are preempted by the clear command, and the active and standby boards are normal, the status of the working board is the active board, and the status is no request.

Among the above local switching requests, clear, lock, force, and manual are external commands, and signal failure and signal degradation are generated by the board according to the actual signal quality and the condition of key components on the board.

In addition, it should be noted that, in order to improve switching efficiency, it is preferable to arrange the main SCC and the main board on the same subrack.

At the same time, in consideration of safety, the slave SCC is also used as a backup master SCC, and becomes the master SCC when the original master SCC fails. It should be noted that the backup master SCC can also be selected separately, which will not be described in detail here.

Under normal working conditions, only the active SCC completes the switching operation and control of the active and standby single boards, and at the same time synchronizes the protection configuration data and status data to the standby SCC. When the main control SCC detects its own failure, it will downgrade itself to the standby SCC , notify the standby SCC that it has been downgraded, and request the standby SCC to take over its work. After receiving the request, the standby SCC automatically upgrades to the master control SCC, and generates an alarm to notify the maintenance personnel.

The following describes a specific example of performing board protection across subracks according to the status of the active and standby boards.

The boards protected by the channel between boards across subracks include OCU/OTU boards. The two boards are respectively inserted into different subracks of the same NE, and the SCC on any subrack in the NE is designated as the main control SCC board for cross-subrack inter-board channel protection (it is recommended to specify the inter-board channel to protect the main control The SCC and the active OCU/OTU single board are on the same subrack, so as to improve switching efficiency), and serve as the switching master controller, and the SCCs of the remaining subracks are slave SCCs, and the slave SCCs are also used as switching backup SCCs.

The specific signal processing process is as follows:

The client-side signal is divided into two paths through the coupler, and is sent to two OCU/OTU boards respectively. The two optical signals sent by the two OCU/OTU boards are sent to the receiving end through different routes. At the receiving end, the two paths of light enter two OCU/OTU boards respectively, and the inter-board channel protection main control SCC is responsible for the adjudication task. At the same time, relevant data is also synchronized to the backup SCC. The master control SCC/standby SCC reports the signal quality status (SD/SF), the master control SCC determines one of the boards in good condition as a service channel board according to the status of the master board and the slave board, and then sends a switching operation command to the slave SCC, and the slave board The SCC controls the OCU/OTU board on its control subrack to issue a command to switch on and off the client-side lasers. The selected client-side lasers are turned on, and the unselected client-side lasers are turned off. The light on the client side of the two boards is selected and goes all the way down to the client side. Under normal circumstances, select the light of the main board.

As can be seen from the foregoing, the master SCC and each slave SCC in the present invention can use the existing inter-subrack communication technology to communicate across subracks, such as RS485, RS232, Ethernet and other communication methods to ensure fast and reliable communication between subracks. communication.

Since cross-subrack communication is a well-known technology in the art, an optimized implementation will be described below, that is, an SCC control command proxy module that supports cross-subrack management is run on each subrack, and provided to other subracks of the same network element. It is used when the SCC of the subrack operates the boards of the subrack or the SCC of the subrack operates the boards of other subracks. The SCC control command proxy module can be configured on any single board of the subrack, but it is preferably configured on the SCC for the convenience of control.

Fig. 2 is a composition block diagram of the SCC control command proxy module.

Referring to Fig. 2, the control command agent of SCC described in the present embodiment mainly includes: monitoring transceiver module 10, operation transceiver module 11

The monitoring transceiver module 10 is configured to monitor and receive control commands or command response information for cross-subrack operations sent by other subrack SCCs, and then send the control commands or command response information to the SCC of the subrack for processing;

The operation transceiver module 11 is used to receive the control command or command response information for cross-subrack operation sent by the subrack SCC, and then send the control command or command response information to the corresponding subrack.

It should be noted that, from the perspective of security, it is also necessary to check the validity of the cross-subrack SCC control command. In order to realize this function, the control command proxy also includes:

The command processing module 12 is used to check the legality of the control command for cross-subrack operation sent by the other subrack system control and communication unit received by the monitoring transceiver module, and set the control command identification record and timeout waiting after the check is passed. time, and then send the control command to the SCC of the subrack for processing; or

Check the validity of the control commands for operating other subracks sent by the subrack SCC, and send the control commands for operating other subracks to the corresponding subracks after the check is passed.

Fig. 3 is a schematic diagram of the working principle of the SCC control command proxy module.

As shown in FIG. 3 , the SCC control command proxy in this embodiment is an independent software module compared to the original SCC function, and its function is to complete the command proxy function between subracks. The SCC control command agent on the two subracks is a Client/Server relationship.

When the local SCC host software application module is ready to operate modules/boards on other subracks, the SCC host software application module will send this operation to the local SCC control command agent, and the local SCC control command agent will find the destination subrack according to the communication route , and record the ID of the command log, and then set the timeout waiting period for this command. After receiving the operation command, the peer SCC control command agent notifies the command to the corresponding software module of the peer SCC host software, and returns the processing result to the local SCC control command proxy. When the local SCC control command agent receives the processing result within the timeout waiting time set, then clear the sign of the command log recorded previously, and return the result to the corresponding software module of the SCC host software that initiated the order; if the SCC control command agent If the processing result is not received within the set timeout waiting time, the corresponding software module command timeout of the SCC host software that initiated the command will be notified, and the identifier of the previously recorded command log will be cleared; if the SCC control command agent receives an unrecorded If the command identified in the command log returns, the return information is discarded (maybe the command has been treated as timeout). The peer SCC control command agent is usually in the service server state, and monitors the signal on the communication channel. After receiving the command sent to itself, it will identify the source (subrack ID) and legality of the command, and send the legal command to The peer SCC host software corresponds to the software module, waits for the processing result of the corresponding software module to return, and then returns the result to the local SCC control command agent.

The schematic diagram of the internal information processing flow of the SCC control command agent is shown in Figure 4, and there are a total of 4 paths for processing:

Two of the paths are used to process the local subrack to operate the terminal rack, and the other two paths are used to operate the local subrack to the terminal rack. A brief description is as follows:

There are two paths to terminal racks to handle local subrack operations:

1. Waiting to receive the message sent by the relevant module -- (command to operate other subracks) -- combined

Legality check--(send commands to other subracks);

2. The server listens to the information sent by other subracks -- (the command response is returned to the relevant module) There are two paths to operate the local subrack for the terminal rack:

3. Server listens to the information sent by other subracks--(command to operate this subrack)--validity check--command identification record/timeout waiting time--(send the command to the relevant module);

4. Waiting to receive the message sent by the relevant module--(command response)--command identification record/timeout waiting time--(return the command response to other subracks).

Fig. 5 is a schematic diagram of the working principle of the SCC for implementing inter-board channel protection according to the present invention.

In order to realize the switching operation of the active and standby boards, the SCC on a subrack needs to include: an inter-board channel protection module and a single board management/configuration module. In the present invention, the SCC is divided into a master SCC and a slave SCC. The inter-board channel protection of the subrack requires some necessary settings. The configurations of the master and slave SCCs are not the same, and are described below.

The main SCC described in the present invention includes:

The channel protection module between the main boards is used to save the channel protection configuration between the main boards, and control the main and standby boards across subracks to perform corresponding switching operations according to the status of the main boards or the local switching request. Protection configuration includes: active and standby SCC protection pair, protection mode, recovery mode/recovery time, active and standby boards, switching enable switch for signal degradation events;

Active and standby SCC protection pair, create an active and standby SCC protection pair to manage the protection unit;

Protection mode, set the protection mode to cross-subrack channel protection;

Recovery mode/recovery time, set whether it is the recovery mode, if the recovery mode is set, also set the recovery time;

For active and standby boards, set the ID and slot number of the subrack where the active and standby boards are located, and set the relationship between the active and standby boards;

SD event switching enable switch, set whether SD time is used as switching condition.

Save the configuration parameters, and after other settings are completed, order the single board to save the configuration to Flash, so that the two single boards can be restored regardless of the soft reset or hard reset of the single board, even if the main control (ie SCC) is not in place. previous configuration.

The main single board management configuration module is used to realize the management configuration function of the subrack single board where the main SCC is located;

The slave SCC includes:

The slave inter-board channel protection module is used to save the slave inter-board channel protection configuration, and respond to the switching control request of the main board inter-board channel module to perform corresponding switching operations on the controlled main or standby single board. The slave inter-board channel protection configuration includes: Active and standby SCC protection pair, protection mode, main control system and communication unit, main and standby boards;

Active and standby SCC protection pair, create a protection pair to manage the protection unit;

Protection mode, set the protection mode to cross-subrack channel protection;

Main control SCC, set the main subrack ID and board position of the main control SCC;

OCU/OTU boards, set the OCU/OTU boards on this subrack as protected boards.

Save the configuration parameters, and after other settings are completed, command the board to save the configuration to the Flash, so that the two boards can restore the previous configuration even after the board is reset softly or hard, even if the main control is not in place.

The slave board management and configuration module is used to realize the management and configuration function of the board of the subrack where the SCC is located.

The present invention allows the main control SCC, the main OCU/OTU, and the standby OCU/OTU to be located on any subrack in the network element without any restrictions and constraints. In practical applications, considering efficiency, the main SCC, main OCU/OTU The OTU is placed on one subrack, and the standby OCU/OTU and slave SCC are placed on another subrack to improve efficiency. Other situations can be transformed into this situation through planning or transformed into channel protection on a single subrack.

A method for protecting a channel between boards according to another aspect of the present invention will be described below.

Fig. 6 is a flow chart of the method for protecting the channel between boards of the present invention.

As shown in the figure, in step s10, the active and standby single boards distributed on different subracks are firstly set. The single boards protected by the inter-board channel of the mid-span subrack in the present invention include OCU/OTU single boards, and the conditions of the active and standby single boards and the local switching conditions are as described above, and will not be described in detail here.

Then, in step s11, set the SCCs distributed on each subrack, and designate one of the SCCs as the master SCC, and the rest as slave SCCs. During specific implementation, it is preferable to arrange the main SCC and the main board on the same subrack. In addition, it is necessary to configure the master inter-board channel protection configuration for the master SCC, and perform slave inter-board channel protection configuration for the slave SCC. For the protection configuration of the channel between the master boards and the channel protection configuration between the slave boards, refer to the foregoing description, and will not be described in detail here.

In addition, from the perspective of safety, it is necessary to implement the backup of the main control SCC, that is, to set up a backup main control SCC. Under normal working conditions, only the main control SCC completes the operation and control of the OTU single board, and at the same time protects the configuration data and status data. Synchronize to the standby SCC. When the main control SCC detects its own failure, it will downgrade itself to the standby SCC, notify the standby SCC that it has been downgraded, and request the standby SCC to take over its work. After receiving the request, the standby SCC will automatically upgrade to the main control SCC, and An alarm is generated to notify maintenance personnel.

Finally, in step s12, according to the status of the active and standby boards or the local switching request, the master SCC communicates with the slave SCC across subracks, and controls the master and standby boards to perform corresponding switching operations to realize inter-board channel protection.

In the present invention, the master-slave SCC and each slave SCC can use the existing inter-subrack communication technology to perform inter-subrack communication. For details, refer to the foregoing description, and details will not be repeated here.

As mentioned above, in specific implementation, an SCC control command proxy service module that supports cross-subrack management can be run on the SCC on each subrack, providing the SCC control command proxy function to realize the switching operation of active and standby boards across subracks . Specifically, the SCC control command agent mainly implements the following operations:

1. Monitor and receive the control command or command response information for cross-subrack operation sent by the SCC of other subracks, and then send the control command or command response information to the SCC of the subrack for processing; in specific implementation, for other subracks The control command for cross-subrack operation sent by the system control and communication unit needs to be checked for legality, and the control command identification record and timeout waiting time are set after the check is passed;

2. Receive the control command or command response information for cross-subrack operation sent by the subrack SCC, and then send the control command or command response information to the corresponding subrack. During specific implementation, the control commands for operating other subracks sent by the subrack SCC need to be checked for legality, and the control commands for operating other subracks are sent to the corresponding subracks only after the check is passed.

The following uses a specific example of channel protection between boards to illustrate.

As shown in FIG. 7 , the network element in this embodiment includes two subracks A and B, and the SCC on a certain subrack can only directly control the single board on the same subrack as itself. However, in the realization of inter-board channel protection across subracks, the OTU boards that protect each other are located on different subracks. Define a cross-subrack inter-board channel protection group. Two subracks A and B have SCC boards A1 (main control SCC) and B1 (standby SCC) and OTU boards A2 (main OTU) and B2 (standby OTU) respectively. . A1 and A2 are located on subrack A, and B1 and B2 are located on subrack B. A1 and B1 are SCC boards that protect each other, and A2 and B2 are OTU boards that protect each other. In order to realize inter-board channel protection, A1 needs to control A2 and B2 at the same time. In addition, B1 needs to manage the boards on its own subrack, and also needs to manage the B2 board. If A1 simply bypasses B1 and directly controls the B2 board, it is inevitable that the B1 board will lose its management due to the unpredictable state of the B2 board, which may cause security problems.

To achieve control safely, A1 must control B2 through B1, and the SCC control command agent provides this function. As shown in the figure, the SCC (that is, the main control board) on each subrack runs an SCC control command agent module that supports cross-subrack management, and provides it to other subrack SCCs of the same network element to use when operating the boards of this subrack . Each subrack has its own subrack ID for identifying itself and for inter-subrack communication. By configuring the active-standby relationship of the SCC, the two SCCs A1 and B1 form a mutual trust mechanism, and the commands between them do not require additional security authentication. A1 issues a command to B2, and the addressing of B2 includes two parts: the subrack number and the board position number. At this time, the command is passed to the SCC control command agent on A1 for execution, and the SCC control command agent searches for the to the specified subrack, and pass the command to the SCC control command agent on B1. After receiving the command, the SCC control command agent on B1 parses the command, notifies the relevant module on B1 to process the command, and waits for the execution result. Finally, the The command result is returned to the SCC control command agent on the A1 subrack, and then the SCC control command agent on A1 notifies the relevant modules on A1 of the result.

In summary, the present invention realizes board management across subracks through the existing inter-subrack communication technology, cancels the restriction that a single board must be in one subrack for protection, allows more flexible protection configuration, and can reduce the number of required subracks number, reducing equipment costs.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.

Claims (14)

1. path protection device between a plate is used for wavelength-division multiplex system, it is characterized in that, comprising:

Be arranged on the standby usage veneer on the different subracks, wherein primary veneer is as working traffic passage veneer, and standby board is as service channel veneer for subsequent use;

Be arranged on the system's control and communication unit on each subrack, described system control and communication unit one of them as the main system control and communication unit, all the other conducts are from system's control and communication unit, described main system control and communication unit be used for to be preserved path protection configuration between main board, to the administration configuration of the veneer of this main system control and communication unit place subrack; Described path protection disposes between slave plate for preserving from system's control and communication unit, to this administration configuration from the veneer of system's control and communication unit place subrack; Described main system control and communication unit with stride subrack from system's control and communication unit and communicate by letter, and carry out switching operation to realize path protection between plate according to main and standby boards situation or local switching request control main and standby boards.

2. path protection device between plate according to claim 1; it is characterized in that; main system control and communication unit with stride sub-frame from system's control and the communication unit control command agency by separately and communicate by letter, and control main and standby boards and carry out corresponding switching operation.

3. path protection device between plate according to claim 2 is characterized in that, the control of described system comprises with the control command agency of communication unit:

Monitor transceiver module, be used for to monitor and receive control command or the command response message of the cross-shelf operating that other subrack system control and communication units send, the system's control and communication unit that described control command or command response message is sent to this subrack is processed;

The operation transceiver module be used for to receive control command or the command response message of the cross-shelf operating that book frame system control and communication unit sends, and described control command or command response message are sent to corresponding subrack.

4. channel protection device between plate according to claim 3 is characterized in that, described control command agency also comprises:

Command processing module, be used for carrying out validity checking to monitoring transceiver module other sub-frame system controls that receive and the control command of striding sub-frame operation that communication unit is sent, and check by after this control command identification record and waiting-timeout time are set, the system's control that described control command is sent to the book frame is handled with communication unit; Or

The control command of other subracks of operation that book frame system control and communication unit is sent is carried out validity checking, and check by after the control command of described other subracks of operation is sent to corresponding subrack.

5. according to path protection device between claim 1,2,3 or 4 each described plates; it is characterized in that; described control with communication unit from system also controlled and communication unit as standby main system; transferred main system control and communication unit to when former main system control is lost efficacy with communication unit, former main system control then transfers to from system's control and communication unit with communication unit.

6. path protection device between plate according to claim 5 is characterized in that,

Path protection configuration comprises between described main board: arrange the protection of main preparation system control and communication unit to parameter, the protected mode parameter is set, the recovery pattern is set/recovery time parameter, the standby usage single-plate parameters is set, the signalization deterioration event is switched the enable switch parameter;

The path protection configuration comprises between described slave plate: the main preparation system control and communication unit is set protects parameter, the protected mode parameter is set, master control system and communication unit parameter are set, the standby usage single-plate parameters is set.

7. channel protection device between plate according to claim 1 is characterized in that, described primary veneer and main system control and communication unit are arranged on the same subrack.

8. channel protection method between a plate is used for wavelength-division multiplex system, it is characterized in that, comprises step:

A, setting are distributed in the standby usage veneer on the different subracks;

B, setting are distributed in the system's control and communication unit on each subrack, and specify in the described system control and communication unit one of them as the main system control and communication unit, all the other conducts are from system's control and communication unit, described main system control and communication unit is carried out path protection configuration between main board, carry out between slave plate the path protection configuration to described from system's control and communication unit, the veneer of place subrack is managed configuration;

C, according to main and standby boards situation or the described main system control and communication unit of local switching request with stride subrack from system's control and communication unit and communicate by letter, control standby usage veneer carries out corresponding switching operation to realize path protection between plate.

9. channel protection method between plate according to claim 8; it is characterized in that; the described main system control of step c and communication unit with stride sub-frame from system's control and the communication unit control command agency by separately and communicate by letter, and control main and standby boards and carry out corresponding switching operation.

10. channel protection method between plate according to claim 9 is characterized in that, the control command agency carries out following steps control and carries out switching operation:

C1, monitoring also receive the control command or the command response message of striding sub-frame operation that other sub-frame systems controls and communication unit send, and then system's control that described control command or command response message send to the book frame is handled with communication unit; Or

C2, receive control command or the command response message of the cross-shelf operating that book frame system control and communication unit sends, and then described control command or command response message are sent to corresponding subrack.

11. channel protection method between plate according to claim 10 is characterized in that, step c1 also comprises:

The control command of the cross-shelf operating that other subrack system control and communication units that receive are sent is carried out validity checking, and check by after this control command identification record and waiting-timeout time are set, and then system's control and communication unit that described control command sends to this subrack is processed;

Step c2 also comprises:

The control command of other subracks of operation that book frame system control and communication unit is sent is carried out validity checking, and check by after the control command of described other subracks of operation is sent to corresponding subrack.

12. according to Claim 8, channel protection method between 9,10 or 11 each described plates, it is characterized in that, also comprise:

With described from system's control and communication unit as main system control and communication unit for subsequent use, as the main system control and communication unit, former main system control and communication unit was then as from main system control and communication unit and for subsequent use as the main system control and communication unit when former main system control and communication unit loses efficacy.

13. channel protection method between plate according to claim 12, it is characterized in that, described in the step b between main board path protection configuration comprise: be provided with active and standby with system's control and communication unit protection to parameter, the protected mode parameter is set, the recovery pattern is set/recovery time parameter, be provided with and active and standbyly switch the enable switch parameter with single-plate parameters, signalization deterioration event;

The path protection configuration comprises between described slave plate: standby usage system control and communication unit is set protects parameter, the protected mode parameter is set, master control system and communication unit parameter are set, the standby usage single-plate parameters is set.

14. channel protection method between plate according to claim 8 is characterized in that, step b is arranged on described main system control and communication unit and primary veneer on the same subrack.

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