WO2011140785A1

WO2011140785A1 - Multiplex section protection method and system in packet transport network

Info

Publication number: WO2011140785A1
Application number: PCT/CN2010/077952
Authority: WO
Inventors: 毛自慧
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-05-14
Filing date: 2010-10-21
Publication date: 2011-11-17
Also published as: CN101854255B; CN101854255A

Abstract

The present invention relates to multiplex section protection method and system. The method includes the following steps: a main single board detects main port alarm information of a main channel at real-time, and sends the main port alarm information to a main control board; a standby single board detects standby port alarm information and a standby port K1K2 byte of a standby channel at real-time, and sends the standby port alarm information and the standby port K1K2 byte to the main control board; according to the main port alarm information, the standby port alarm information, the standby port K1K2 byte and preset external control order, the main control board determines whether a main service works in the main channel or the standby channel. Once the multiplex section protection main control board and system of the present invention detect that the main service needs to switch via the real-time detection of the main port alarm information, the standby port alarm information and the standby port K1K2 byte, the main control board performs the main service switch in time according to the main port alarm information, the standby port alarm information, the standby port K1K2 byte and preset external control order; which further improves the safety and reliability of the data transmission in the packet transport network.

Description

Method and system for multiplex section protection in packet transport network

Technical field

The present invention relates to the field of optical communications, and in particular, to a method and system for multiplex section protection in a packet transport network. Background technique

The MSTP (Multi-Service Transfer Platform) technology based on SDH (Synchronous Digital Hierarchy) provides the transmission function of the carrier-class packet service, which reflects the evolution trend of the optical transport network to support packet transmission. However, MSTP is still based on TDM (Test Data Management/Technical Data Management), which is difficult to meet the application requirements of packet-based services. Therefore, the industry has proposed a transport network suitable for packet services - PTN (Packet Transport Network). PTN can effectively deliver packet services and provide carrier-class OAM (Operation Administration and Maintenance) and protected packet transmission technologies.

In order to protect the stable transmission of services on the network element, multiplex section protection has been widely used. However, the multiplex section protection technology applied in the packet transport network is still immature. Especially, with the rapid development of the network scale and number of users, the packet transport network is increasing, and the security and reliability of data transmission are not improved. A good guarantee. Summary of the invention

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a method and system for multiplex section protection in a packet transport network, which aims to improve the security and reliability of data transmission in a packet transport network.

The present invention provides a method for protecting a multiplex section in a packet transport network. The packet transport network includes an active channel and a backup channel. The two ends of the active channel are the primary ports of the primary board, and the two ends of the standby channel are the standby The standby port of the board, the method includes:

The main board detects the alarm information of the primary port of the active channel in real time, and sends the alarm information of the primary port. To the main control board;

The standby board detects the backup port alarm information and the standby port K1K2 bytes in real time, and sends the standby port alarm information and the standby port K1K2 bytes to the main control board;

The main control board determines whether the main service works in the active channel or the standby channel according to the primary port alarm information, the backup port alarm information, the standby port K1K2 byte, and the preset external control command.

The standby port K1K2 byte is an automatic protection switching protocol signaling byte transmitted in the standby channel.

Preferably, the step of determining, by the main control board, that the main service works in the active channel or the standby channel according to the primary port alarm information, the backup port alarm information, the standby port K1K2 byte, and the preset external control command includes:

The main control board receives the alarm information of the primary port sent by the main board, the backup port alarm information sent by the standby board, and the standby port K1K2 bytes.

The new backup port K1K2 byte and the current working channel information of the protection group are generated by the automatic protection switching protocol according to the primary port alarm information, the backup port alarm information, the standby port K1K2 byte, and the preset external control command.

Set the new standby port K1K2 byte to the standby port of the standby board.

According to the current working channel information of the protection group, it is determined whether to perform the switching of the primary service; and when it is determined that the primary service is switched, the main service is switched between the primary channel and the standby channel according to the new standby port K1K2 byte.

Preferably, the step of setting the secondary port to the standby port of the standby board according to the new standby port K1K2 byte includes:

The main control board sends a new standby port K1K2 bytes to the standby board;

The standby board receives the new standby port K1K2 bytes and determines whether the new standby port K1K2 is valid. When the new standby port K1K2 is valid, the new standby port K1K2 is updated to the standby board. Backup port.

Preferably, before the step of detecting the alarm information of the primary port of the active channel in real time, and sending the alarm information of the primary port to the main control board, the method further includes: Create the same multiplex section protection group on the main board and the standby board.

Preferably, the above K1 byte represents a service signal request switching, and the K2 byte represents a bridging state in the multiplex section protection switching.

The present invention also provides a system for multiplex section protection in a packet transport network, comprising:

The main board includes a main port connected to the main channel, and the main board is configured to: detect the alarm information of the main port of the main channel in real time, and send the alarm information of the main port to the main control board;

The standby board includes a backup port connected to the standby channel. The standby board is configured to: detect the backup port alarm information of the standby channel and the standby port K1K2 bytes in real time, and send the standby port alarm information and the standby port K1K2 bytes. To the main control board;

The main control board is configured to determine whether the main service works in the primary channel or the standby channel according to the primary port alarm information, the backup port alarm information, the standby port K1K2 byte, and the preset external control command.

Preferably, the above main control board includes:

The communication board of the main control board is configured to: receive the alarm information of the main port sent by the main board, the alarm information of the standby port sent by the standby board, and the K1K2 byte of the standby port;

The switching decision unit is configured to: generate a new standby port K1K2 byte and the current work of the protection group by using the automatic protection switching protocol according to the primary port alarm information, the standby port alarm information, the standby port K1K2 byte, and the preset external control command. Channel information; and the new standby port K1K2 byte is sent to the standby port of the standby board through the main control board communication unit;

The judging unit is configured to: determine, according to the current working channel information of the protection group, whether to perform the switching of the main service; and the switching execution unit, where the setting is: determining that the main service switching is performed, according to the new standby port K1K2 byte control The main service is switched between the primary channel and the alternate channel.

Preferably, the standby board includes:

The standby board detection unit is configured to: detect the backup port alarm information of the standby channel and the standby port K1K2 bytes in real time;

The standby board communication unit is configured to: send the standby port alarm information and the standby port K1K2 bytes to The main control board is further configured to receive setting information of the standby port K1K2 bytes sent by the main control board; the standby board determining unit is configured to: determine whether the setting information of the new standby port K1K2 byte is legal;

The standby board processing unit is configured to: when the setting information of the new standby port K1K2 byte is valid, the new standby port K1K2 byte is updated to the standby port of the standby board.

Preferably, the standby board processing unit is further configured to: create a multiplex section protection group on the standby board. Preferably, the foregoing main board includes:

The main board detection unit is configured to: detect the alarm information of the main port of the main channel in real time; the main board communication unit is configured to: send the alarm information of the main port to the main control board; and the main board processing unit, Set to: Create a multiplex section protection group on the main board.

The method and system for protecting the multiplex section of the present invention, by detecting the alarm information of the main port, the alarm information of the standby port, and the K1K2 byte of the standby port in real time, once the main service needs to be switched, the main control board is based on the alarm information of the main port. The backup port alarm information, the standby port K1K2 byte, and the preset external control command perform the main service switching in time, thereby further improving the security and reliability of data transmission in the packet transmission network. BRIEF abstract

1 is a schematic flowchart of a method for multiplex section protection in a packet transport network according to the present invention; FIG. 2 is a schematic diagram of the main control board according to the primary port alarm information, the backup port alarm information, the standby port K1K2 byte, and the foregoing embodiment. A schematic diagram of a process of determining an external service command to determine whether the primary service operates in the primary channel or the alternate channel;

3 is a schematic structural diagram of a 1:1 bidirectional linear multiplex section protection switching in the above embodiment; FIG. 4 is a schematic structural diagram of a 1:1 bidirectional linear multiplex section protection switching in the above embodiment; Schematic diagram of the structure before the protection switching of the multiplex section of the central network;

6 is a schematic structural diagram of a ring network multiplex section protection switching in the foregoing embodiment;

7 is a schematic structural diagram of an embodiment of a system for multiplexing segment protection in a packet transport network according to the present invention; Figure 8 is a schematic structural view of the main control board in the above embodiment;

9 is a schematic structural view of a standby board in the above embodiment;

FIG. 10 is a schematic structural view of a main veneer in the above embodiment. The implementation, functional features, and advantages of the present invention will be further described with reference to the accompanying drawings. Preferred embodiment of the invention

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The method of multiplex section protection in the packet transport network of the present invention is applied to the multiplex section protection of the main service in the packet transport network. The packet transport network includes a primary channel and a backup channel. The two ends of the active channel are the primary ports of the main board and are used to run the main service. The two ends of the standby channel are the backup ports of the standby board. Generally, they do not carry services. They are used to protect the multiplex section when the primary service link fails. The multiplex section protection includes linear multiplex section protection and ring network multiplex section protection. The multiplex section protection of the present invention is mainly used for one-to-one (1:1) bidirectional using the Automatic Protection Switch (APS) protocol. Linear multiplex section protection and ring network multiplex section protection.

1 shows the flow of an embodiment of a method for multiplex section protection in a packet transport network of the present invention. The method for protecting multiplex section in a packet transport network in this embodiment includes the following steps:

The slave board detects the alarm information of the primary port of the active channel in real time, and sends the alarm information of the primary port to the main control board.

The main board includes multiple primary ports, which can run the primary service. When the primary service link fails, an alarm is generated, which is called primary port alarm information. The primary port alarm information includes signal failure and signal degradation. Signal failure includes Loss Of Frame (LOF), Loss Of Signal (LOS), and Multiplex Section Alarm Indication Signal (MS-AIS). In step S1 l, the detection process of the primary port alarm information may be implemented by a timing trigger or an interrupt trigger. For example, the timed trigger mode is set by setting a fixed time (for example, 10ms) timer on the main board. Trigger signal triggers the main board to detect the alarm information of the primary port. The interrupt triggering is generated by using the interrupt signal generated when the main service link fails. The interrupt signal is used to trigger the main board to detect the alarm information of the main port.

Step S12: The standby board detects the backup port alarm information of the standby channel and the standby port K1K2 byte in real time, and sends the standby port alarm information and the standby port K1K2 bytes to the main control board;

The standby board includes multiple backup ports for switching the main service when the primary service link running on the primary port fails. The alarm information of the standby port includes: signal failure and signal degradation. Signal failures include Loss OfFrame (LOF), Loss Of Signal (LOS), and Multiplex Section Alarm Indication Signal (MS-AIS).

The standby port K1K2 byte is the APS protocol signaling byte transmitted in the alternate channel. The K1 byte indicates the service signal request switching. The 1~4 bits of the K1 byte are bridge request codes, and the bridge request codes include 16 kinds of bridge requests, such as lock protection, forced switching, and manual switching, according to priority levels. The 5~8 bits of the K1 byte are the destination node ID of the bridge request code indicated by the 1~4 bits of the K1 byte. The K2 byte indicates the bridge state in the multiplex section protection switching. The 1~4 bits of the K2 byte are the source node ID for the bridge request, the 5th bit is the long/short path flag, and the 6~8 bits are the current bridge request status code of the source node that issued the bridge request.

According to the backup port alarm information and the standby port K1K2 byte, the current service running status of the standby channel is known. For example, the backup port alarm information determines whether there is an alarm on the standby port of the standby channel. According to the backup port K1K2 byte, it can be determined whether there is another protection service switching.

In step S12, the detection process of the standby port alarm information and the standby port K1K2 byte can also be implemented by a timing query or an interrupt trigger. For example, in the timed query mode, a fixed-time (for example, 10ms) timer is set on the standby board. A trigger signal is generated every time the interval is fixed. The standby board detects the alarm information of the standby port and the standby port K1K2 bytes. The interrupt trigger is generated by using the interrupt signal generated when the service link fails. The interrupt signal is used to trigger the standby board to detect the backup port alarm information and the standby port K1K2 bytes.

Step S13: The main control board determines, according to the primary port alarm information, the standby port alarm information, the standby port K1K2 byte, and the preset external control command, that the primary service works in the primary channel or the standby channel. Referring to FIG. 2, step S13 further includes:

Step S131: The main control board receives the alarm information of the main port sent by the main board, the backup port alarm information sent by the standby board, and the standby port K1K2 byte. Step S132: According to the main port alarm information, the backup port alarm information, and the standby port K1K2 The byte and the preset external control command generate a new standby port K1K2 byte and the current working channel information of the protection group through the automatic protection switching protocol;

The main control board uses the automatic protection switching protocol to perform the switching decision based on the primary port alarm information, the backup port alarm information, the standby port K1K2 byte, and the preset external control command, and generates a new standby port K1K2 byte and the current work of the protection group. Channel information. The automatic protection switching protocol conforms to the ITU-G.841 standard, and the specific switching decision of the automatic protection switching protocol is specified in the ITU0-G.841 standard. For example, first, according to the alarm information of the primary port, it is determined whether the primary service needs to be switched. The alarm information of the primary port is the triggering condition of the primary service switching. When the alarm information of the primary port is detected, it is determined that the primary service needs to be switched. Secondly, according to the alarm information of the standby port, it is determined whether there is an alarm information of the standby port of the standby channel. If yes, it is determined that the standby port of the standby channel is unavailable; otherwise, the standby port of the standby channel is available. Finally, it is determined whether the operation of the alternate channel is satisfied according to the standby port K1K2 byte, and whether the condition of the switching is satisfied. For example, when it is known that the alternate channel is being used for the switching request of another service according to the backup port K1K2 byte, the priority of the switching control command of the primary service is determined according to the priority order of the bridge request code in the K1 byte. The priority of the switching request that is higher than the other service is to determine that the standby channel satisfies the condition of the switching request; otherwise, it is determined that the standby channel does not satisfy the condition of the switching request. Therefore, according to different switching decision results, a new standby port K1K2 byte and the current working channel information of the protection group are generated.

Step S133: Set a new standby port K1K2 byte to the standby port of the standby board.

Further, step S133 is specifically:

A. The main control board sends a new standby port K1K2 bytes to the standby board.

B. The standby board receives the new standby port K1K2 byte and determines whether the new standby port K1K2 byte is legal. When the new standby port K1K2 byte is legal, the new standby port K1K2 byte is updated to the standby form. The backup port of the board;

According to the new standby port K1K2 byte, determine the destination node in the new standby port K1K2 byte If the ID is the standby board, it is determined that the new standby port K1K2 is legal. Otherwise, it is determined that the new standby port K1K2 is invalid. The new standby port K1K2 is discarded. When the new standby port K1K2 is valid, the new standby port K1K2 is updated to the standby port of the standby board. Therefore, when the main control board switches the primary service from the active channel to the standby channel, the backup port of the standby channel performs the primary service transmission according to the updated standby port K1K2 bytes.

Step S134: Determine, according to current working channel information of the protection group, whether to perform switching of the primary service;

The current working channel information of the protection group is compared with the working channel information before the decision. If the current working channel information of the protection group changes, it is determined that the primary service is switched; otherwise, the primary service switching is not performed.

Step S135: Control the main service to switch between the primary channel and the standby channel according to the new standby port K1K2 byte.

When it is judged that the main service is switched, the main service is switched between the main channel and the alternate channel according to the new standby port K1K2 byte. Otherwise, the primary port alarm information, the standby port alarm information, and the standby port K1K2 bytes are discarded.

In this embodiment, the method for protecting the multiplex section in the packet transport network, the main board is used to detect the alarm information of the main port in real time, and the standby board detects the alarm information of the standby port and the K1K2 byte of the standby port in real time, and once the main service needs to be switched, the main control The board performs the main service switching in time according to the main port alarm information, the standby port alarm information, the standby port K1K2 byte, and the preset external control command, thereby further improving the security and reliability of data transmission in the packet transmission network.

It should be noted that, in the present invention, the main board and the standby board belong to the same multiplex section protection group. Therefore, before step S11, step S10 is further included: the same multiplex section protection group is created on the main board and the standby board respectively. The attributes of the multiplex section protection group include the protection group ID and the protection group name. The primary board and the standby board are created with the same protection group ID and the same protection group name. group.

The multiplex section protection process of the present invention will be described below with 1: 1 bidirectional linear multiplex section protection and ring network multiplex section protection, respectively.

(1) 1: 1 bidirectional linear multiplex section protection (as shown in Figure 3) In the 1:1 bidirectional linear protection, the alternate channel can be used to protect the service switching of the N primary channels. Therefore, the APS protocol is required for bidirectional switching.

First, when the primary channel fails, the primary board A or the main board B detects the alarm information of the primary port, and sends the alarm information of the primary port to the main control board to notify the main control board that the primary channel needs to be switched.

Secondly, the standby board A or the standby board B will also detect the backup port alarm information and the standby port K1K2 bytes in real time, and send the backup port alarm information and the standby port K1K2 bytes to the main control board to let the main control board know. The operation of the alternate channel;

Finally, the main control board performs a switching decision through the automatic protection switching protocol according to the primary port alarm information, the standby port alarm information, the standby port K1K2 byte, and the preset external control command, and determines whether to perform the main service according to the result of the switching decision. Switched. When it is determined that the primary service is switched, the selectors of the primary service sender and the receiver are switched from the primary channel to the standby channel, and a backup port is generated.

The K1K2 byte setting information is sent to the standby board, so that the standby board updates the configuration information of the standby port K1K2 bytes to the standby port of the standby board to complete the main service switching, as shown in Figure 4. When it is determined that the main service is not switched, the primary port alarm information, the backup port alarm information, and the standby port K1K2 bytes are discarded, and the main service still works in the active channel.

(2) Ring network multiplex section protection

The two-fiber bidirectional multiplex section protection and the four-fiber bidirectional multiplex section protection are commonly used in the ring network multiplex section protection. Here, only the two-fiber bidirectional multiplex section protection is taken as an example for description.

The multiplex section protection ring shown in Figure 5 includes port A to port E. Each port corresponds to a single board. Two fibers are connected between each port. One is the working fiber and the other is the protection fiber. The main service is sent by the sender and transmitted to the receiver through the primary channel of port A, port B, port C, and port D. The channel formed by port A, port E, and port D is the alternate channel.

First, when the transmission between the port B and the port C is faulty, both the board B and the board C will detect the alarm information of the master port and send the alarm information of the master port to the main control board.

Secondly, the board E will detect the backup port alarm information of the port E and the standby port K1K2 bytes in real time, and send the backup port alarm information and the standby port K1K2 bytes to the main control board, so that the main control board knows the alternate channel. Operational situation; Finally, the main control board performs a switching decision through the automatic protection switching protocol according to the primary port alarm information, the standby port alarm information, the standby port K1K2 byte, and the preset external control command, and determines whether to perform the main service according to the result of the switching decision. Switched. When it is determined that the main service is switched, the switch of the primary service sender and the receiver is switched from the active channel to the backup channel according to the automatic protection switching protocol, and the setting information of the standby port K1K2 bytes is generated and sent to the board E. The board E updates the setting information of the standby port K1K2 bytes to the corresponding standby port to complete the main service switching, as shown in Figure 6. When it is determined that the main service is not switched, the primary port alarm information, the backup port alarm information, and the standby port K1K2 bytes are discarded, and the main service still works in the active channel.

Referring to FIG. 7, a structure of a system for protecting a multiplex section in a packet transport network according to the present invention is provided. The system for protecting a multiplex section in a packet transport network in this embodiment includes:

The main board 10, including the main port connected to the main channel, is used for real-time detection of the main port alarm information of the main channel, and sends the main port alarm information to the main control board 30;

The main port alarm information includes: signal failure and signal degradation. Signal failure includes Loss Of Frame (LOF), Loss Of Signal (LOS), and Multiplex Section Alarm Indication Signal (MS-AIS). When the primary board 10 detects the alarm information of the primary port, it indicates that the primary board 10 needs to be switched.

The standby board 20 includes a backup port connected to the standby channel, and is configured to detect the backup port alarm information of the standby channel and the standby port K1K2 bytes in real time, and send the standby port alarm information and the standby port K1K2 bytes to the main control board 30;

The backup port alarm information also includes: signal failure and signal degradation. Signal failure includes Loss Of Frame (LOF), Loss Of Signal (LOS), and Multiplex Section Alarm Indication Signal (MS-AIS). The standby port K1K2 byte is the APS protocol signaling byte transmitted in the alternate channel. The K1 byte indicates that the service signal is requested to be switched. The 1~4 bits of the K1 byte are the bridge request code, and the 5~8 bits of the K1 byte are the destination node ID of the bridge request code indicated by the 1~4 bits of the K1 byte. The K2 byte indicates the bridge state in the multiplex section protection switching. The 1~4 bits of the K2 byte are the source address of the bridge requesting the source node, the 5th bit is the long/short path flag, and the 6~8 bits are the current bridge request status code of the source node that sends the bridge request. The main control board 30 is configured to determine whether the main service works in the primary channel or the standby channel according to the primary port alarm information, the standby port alarm information, the standby port K1K2 byte, and the preset external control command.

Referring to Figure 8, the main control board 30 includes:

The main control board communication unit 31 is configured to receive the main port alarm information sent by the main board 10, the standby port alarm information sent by the standby board 20, and the standby port K1K2 byte;

The switching decision unit 32 is configured to generate a new standby port K1K2 byte and a current working channel of the protection group by using an automatic protection switching protocol according to the primary port alarm information, the standby port alarm information, the standby port K1K2 byte, and the preset external control command. The new standby port K1K2 byte is sent to the standby port of the standby board through the main control board communication unit 31;

The determining unit 33 is configured to determine, according to current working channel information of the protection group, whether to perform switching of the main service;

The switching execution unit 34 is configured to determine that the primary service is switched between the primary channel and the standby channel according to the new standby port K1K2 byte when performing the primary service switching.

Referring to Figure 9, the standby board 20 includes:

The standby board detection unit 21 is configured to detect the backup port alarm information and the backup port of the standby channel in real time.

K1K2 bytes;

The standby board communication unit 22 is configured to send the standby port alarm information and the standby port K1K2 byte to the main control board 30; and is further configured to receive the new standby port K1K2 byte sent by the main control board 30;

The standby board determining unit 23 is configured to determine whether the new standby port K1K2 byte is legal;

The standby board processing unit 24 is configured to update the new standby port K1K2 byte to the standby port of the standby board 20 when the new standby port K1K2 is legal.

The standby board processing unit 24 is further configured to create a multiplex section protection group on the standby board 20.

Referring to Figure 10, the main board 10 includes:

The main board detecting unit 11 is configured to detect the main port alarm information of the main channel in real time; the main board communication unit 12 is configured to send the main port alarm information to the main control board 30;

The main board processing unit 13 is configured to create a multiplex section protection group on the main board 10.

In the present invention, the main board and the standby board belong to the same multiplex section protection group, so the main board 10 is The standby board 20 is created with the same protection group ID and the same protection group name, so that the main board 10 and the standby board 20 belong to the same multiplex section protection group.

In this embodiment, the multiplex section protection system in the packet transmission network detects the alarm information of the primary port in real time through the main board 10, and the standby board 20 detects the alarm information of the standby port and the K1K2 byte of the standby port in real time, and once the main service needs to be switched, the main The control board 30 can perform the main service switching in time according to the main port alarm information, the standby port alarm information, the standby port K1K2 byte, and the preset external control command, thereby further improving the security and reliability of data transmission in the packet transmission network.

While the preferred embodiments of the present invention have been disclosed for purposes of illustration, those skilled in the art will recognize that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.

One of ordinary skill in the art will appreciate that all or a portion of the steps above may be accomplished by a program to instruct the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

Industrial applicability

The present invention detects the main port alarm information, the backup port alarm information, and the standby port K1K2 byte in real time. Once the main service needs to be switched, the main control board is based on the main port alarm information, the backup port alarm information, and the standby port K1K2 byte and The preset external control command performs the main service switching in time, thereby further improving the security and reliability of data transmission in the packet transmission network.

Claims

Claim

A method for protecting a multiplex section in a packet transport network, wherein the packet transport network includes a primary channel and a backup channel, and both ends of the primary channel are primary ports of the primary board, and two of the standby channels The port is the standby port of the standby board. The method includes:

The main board detects the alarm information of the main port of the active channel in real time, and sends the alarm information of the main port to the main control board.

The standby board detects the backup port alarm information and the standby port K1K2 bytes in real time, and sends the backup port alarm information and the standby port K1K2 bytes to the main control board;

The main control board determines whether the main service works in the active channel or the standby channel according to the primary port alarm information, the standby port alarm information, the standby port K1K2 byte, and the preset external control command.

2. The method of protecting a multiplex section in a packet transport network according to claim 1, wherein the main control board is configured according to the primary port alarm information, the standby port alarm information, the standby port K1K2 byte, and a preset external control command. The steps to determine whether the primary service works in the primary channel or the alternate channel include:

According to the primary port alarm information, the standby port alarm information, the standby port K1K2 byte, and the preset external control command, the new backup port K1K2 byte and the current working channel information of the protection group are generated through the automatic protection switching protocol;

Set the new standby port K1K2 byte to the standby port of the standby board.

The multiplex section protection method in the packet transport network of claim 2, wherein the step of setting the new standby port K1K2 byte to the standby port of the standby board includes: The main control board sends a new standby port K1K2 bytes to the standby board;

The method of protecting a multiplex section in a packet transport network according to claim 1, wherein the step of detecting the primary port alarm information of the active channel in real time and transmitting the primary port alarm information to the main control board, The method also includes:

Create the same multiplex section protection group on the main board and the standby board.

The multiplex section protection method in a packet transport network according to any one of claims 1 to 4, wherein the K1 byte represents a service signal request switching, and the K2 byte represents a multiplex section protection switching. Bridge status.

6. A system for multiplex section protection in a packet transport network, comprising:

The main control board is configured to: determine the main service to work in the primary channel or the backup channel according to the primary port alarm information, the backup port alarm information, the standby port K1K2 byte, and the preset external control command;

7. The system of multiplex section protection in a packet transport network according to claim 6, wherein the main control board comprises:

The switching decision unit is configured to: according to the primary port alarm information, the backup port alarm information, and the backup The port K1K2 byte and the preset external control command generate a new standby port K1K2 byte and the current working channel information of the protection group through the automatic protection switching protocol; and send the new standby port K1K2 byte to the main control board communication unit to Standby port of the standby board;

a judging unit, configured to: determine, according to current working channel information of the protection group, whether to perform switching of the main service;

The switching execution unit is configured to: when it is determined that the primary service switching is performed, the main service is switched between the primary channel and the standby channel according to the new standby port K1K2 byte.

The multiplex section protection system in the packet transport network of claim 7, wherein the standby board comprises:

The standby board communication unit is configured to: send the standby port alarm information and the standby port K1K2 bytes to the main control board; and also receive the new standby port K1K2 bytes sent by the main control board;

The standby board judgment unit is configured to: determine whether the new standby port K1K2 byte is legal; and

The standby board processing unit is configured to: when the new standby port K1K2 is legal, the new standby port K1K2 byte is updated to the standby port of the standby board.

The multiplex section protection system in the packet transport network of claim 8, wherein the standby board processing unit is further configured to: create a multiplex section protection group on the standby board.

The multiplex section protection system in the packet transport network of claim 6, wherein the main board comprises: