WO2018059344A1

WO2018059344A1 - Method, apparatus, and system for multiplex section protection bidirectional switchover and computer storage medium

Info

Publication number: WO2018059344A1
Application number: PCT/CN2017/103109
Authority: WO
Inventors: 付占亮
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-09-29
Filing date: 2017-09-25
Publication date: 2018-04-05
Also published as: CN107888280A

Abstract

The present invention provides a method, an apparatus, and a system for multiplex section protection bidirectional switchover and a computer storage medium. The method comprises: when link alarm information generated due to a failure in a working link is detected, a first node initiating first protection switchover processing according to the link alarm information; and the first node sending RDI or REI alarm information to a second node, so that the second node initiates the first protection switchover processing according to the RDI or REI alarm information, the first protection switchover processing comprising switching a data transmission link between the first node and the second node from the working link to a protection link, and the working link and the protection link being links between the first node and the second node.

Description

Multiplex section protection bidirectional switching method, device and system, and computer storage medium

Cross-reference to related applications

The present application is filed on the basis of the Chinese Patent Application No. PCT Application No. No. No. No. No. No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No

Technical field

The present invention relates to the field of optical transmission technologies, and in particular, to a multiplex section protection bidirectional switching method, device and system, and computer storage medium.

Background technique

In two-way transmission, one-way or two-way switching can be selected. When performing one-way switching, the selectors at each end are completely independent. When performing bidirectional switching, it tries to coordinate the two ends, so that even if a one-way failure occurs, the settings of the bridges and selectors at both ends are the same. Bidirectional switching always requires an APS channel to convey APS signaling to coordinate both endpoints. One-way switching protects two one-way faults in opposite directions in different entities. Figure 1 shows the traditional functional model of the multiplex section protection (MSP). The link protection range is the link between two nodes. When the link fails, the node that detects the fault will The protection protocol is calculated and interacts with the peer node through the K1/K2 byte information, triggering the protection switching action of the MSP protection group, and switching the traffic to the protection link, thereby realizing the bidirectional switching protection of the link between the two nodes.

When the two-way link is faulty, both nodes can detect the link fault to start the protection protocol calculation and trigger the protection switching operation of the node to perform traffic switching. The two nodes can perform bidirectional switching without K1/K2 byte interaction. For a single link failure, because only one node can detect the link failure, the node that cannot detect the link failure also has protection switching. The node that detected the fault sends a K1/K2 byte notification to the opposite end node, or the opposite end node can also detect the link fault and know the link direction fault in the sending direction. In practice, there is a need for cross-vendor cross-device implementation of MSP bidirectional switching, because there may be differences in the understanding of the ITU-T standard details. There are more problems in K1/K2 byte interaction between different vendors' devices. There is a relatively simple technique for implementing MSP bidirectional switching.

In summary, for the cross-device multiplex section protection MSP bidirectional switching method, the switching method is complicated and prone to failure, and an effective solution has not been proposed.

Summary of the invention

The embodiment of the invention provides a multiplex section protection bidirectional switching method, device and system, and a computer storage medium, so as to at least solve the problem that the switching mode is complicated and prone to failure in the MSP bidirectional switching method of the cross-device multiplex section protection in the related art. .

According to an aspect of the embodiments of the present invention, a multiplex section protection bidirectional switching method is provided, including:

When detecting the link alarm information generated by the fault of the working link, the first node starts the first protection switching process according to the link alarm information;

The first node sends an RDI (Remote Defect Indication) or REI (Remote Error Indication) alarm information to the second node, so that the second node starts the foregoing according to the RDI or REI alarm information. a first protection switching process, wherein the first protection switching process is to switch a link for transmitting data between the first node and the second node from the working link to a protection link, where the working link and The protection link is a link between the first node and the second node.

In an embodiment of the present invention, after detecting the link alarm information generated by the fault of the working link, the method further includes:

When detecting the link alarm disappearing information generated by the foregoing fault recovery of the working link, the first node starts the second protection switching process according to the link alarm disappearing information;

The first node sends the RDI or REI alarm disappearing information to the second node, so that the second node starts the second protection switching process according to the RDI or REI alarm disappearing information, where the second protection switching process is A link for transmitting data between the first node and the second node is switched from the protection link to the working link. In an embodiment of the present invention, the link alarm information is a link SF (Signal Fail) or SD (Signal Degrade) alarm information.

According to another aspect of the embodiments of the present invention, a multiplex section protection bidirectional switching method is provided, including:

The second node receives the RDI or REI alarm information sent by the first node, where the RDI or REI alarm information is used to indicate that the first node detects the link alarm information generated by the fault of the working link, and starts the first Protection switching process;

The second node starts the first protection switching process according to the RDI or REI alarm information, where the first protection switching process is to use a link between the first node and the second node for transmitting data from the working chain. The path is switched to the protection link, and the working link and the protection link are links between the first node and the second node.

In an embodiment of the present invention, after the second node receives the RDI or REI alarm information sent by the first node, the method further includes:

The second node receives the RDI or REI alarm disappearance information sent by the first node, where the RDI or REI alarm disappearance information is used to indicate that the first node detects the link alarm generated by the fault recovery of the working link. Disappearing the information and starting the second protection switching process;

The second node starts the second protection switching process according to the RDI or REI alarm disappearing information, wherein the second protection switching process is to use a link between the first node and the second node for transmitting data from the foregoing The protection link switches to the above working link.

In an embodiment of the invention, the link alarm information is link SF or SD alarm information.

According to an aspect of the embodiments of the present invention, a multiplex section protection bidirectional switching apparatus is provided, which is applied to a first node, and includes:

The first processing module is configured to: when detecting the link alarm information generated by the fault of the working link, start the first protection switching process according to the link alarm information;

The first sending module is configured to send the RDI or REI alarm information to the second node, so that the second node starts the first protection switching process according to the RDI or REI alarm information, where the first protection switching process is a link for transmitting data between the first node and the second node is switched from the working link to the protection link, where the working link and the protection link are between the first node and the second node. link.

In an embodiment of the present invention, the device further includes: a second processing module, configured to detect, after detecting the link alarm information generated by the fault of the working link, when detecting the fault recovery of the working link When the link alarm disappears, the first node starts the second protection switching process according to the link alarm disappearing information;

The second sending module is configured to send the RDI or REI alarm disappearing information to the second node, so that the second node starts the second protection switching process according to the RDI or REI alarm disappearing information, where the second protection switching process is performed. The link for transmitting data between the first node and the second node is switched from the protection link to the working link.

According to an aspect of the embodiments of the present invention, a multiplex section protection bidirectional switching apparatus is provided, which is applied to a second node, and includes:

The first receiving module is configured to receive the RDI or REI alarm information sent by the first node, where the RDI or REI alarm information is used to indicate that the first node detects the link alarm information generated by the fault of the working link, And starting the first protection switching process;

The third processing module is configured to start a first protection switching process according to the foregoing RDI or REI alarm information, where the first protection switching process is to use a link between the first node and the second node for transmitting data. The working link is switched to the protection link, and the working link is And the protection link is a link between the first node and the second node.

In an embodiment of the invention, the device further includes:

The second receiving module is configured to receive, after the second node receives the RDI or REI alarm information sent by the first node, the RDI or REI alarm disappearing information sent by the first node, where the RDI or REI alarm disappearing information is used. And indicating that the first node detects the link alarm disappearing information generated by the foregoing fault recovery of the working link, and starts the second protection switching process;

The fourth processing module is configured to start the second protection switching process according to the foregoing RDI or REI alarm disappearing information, where the second protection switching process is a chain for transmitting data between the first node and the second node. The road switches from the above protection link to the above working link.

According to an aspect of the embodiments of the present invention, a multiplex section protection bidirectional switching system is provided, including: a first node and a second node, where the first node detects a link generated by a failure of a working link When the alarm information is generated, the first protection switching process is started according to the link alarm information;

The first node sends the RDI or REI alarm information to the second node, so that the second node starts the first protection switching process according to the RDI or REI alarm information, where the first protection switching process is to perform the first a link between the node and the second node for transmitting data is switched from the working link to the protection link, where the working link and the protection link are links between the first node and the second node. .

In an embodiment of the present invention, after the first node detects the link alarm information generated by the fault of the working link, the first node detects that the link alarm generated by the fault recovery of the working link disappears. In the information, the first node starts the second protection switching process according to the link alarm disappearing information;

The first node sends the RDI or REI alarm disappearing information to the second node, so that the second node starts the second protection switching process according to the RDI or REI alarm disappearing information, where the second protection switching process is Used between the first node and the second node The link transmitting the data is switched from the above protection link to the above working link.

According to an aspect of an embodiment of the present invention, a computer storage medium configured to perform the above-described multiplex section protection bidirectional switching method is provided.

In the technical solution of the embodiment of the present invention, when detecting the link alarm information generated by the fault of the working link, the first node starts the first protection switching process according to the link alarm information; the first node sends the second node to the second node. And the RDI or REI alarm information, so that the second node starts the first protection switching process according to the RDI or REI alarm information, where the first protection switching process is used between the first node and the second node. The link for transmitting data is switched from the working link to the protection link, and the working link and the protection link are links between the first node and the second node, which solves the cross-device multiplexing in the related art. The segment protection MSP bidirectional switching method has a complicated switching mode and is prone to failure. In this way, the K1/K2 byte interaction is not required in the MSP bidirectional switching to implement the multiplex section protection bidirectional switching, thereby reducing the complexity of the switching. Improve the efficiency of switching.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic diagram of a linear path multiplex section protection function model in the prior art;

2 is a flowchart of a multiplex section protection bidirectional switching method according to an embodiment of the present invention;

3 is a schematic flow chart of a multiplex section protection bidirectional switching method in the case of a unidirectional link failure according to an example of the present invention;

4 is a flow chart of a multiplex section protection bidirectional switching method according to an example of the present invention;

FIG. 5 is a schematic flowchart of a multiplex section protection bidirectional switching method in a bidirectional link failure according to an embodiment of the present invention; FIG.

6 is a structural block diagram of a multiplex section protection bidirectional switching apparatus according to an embodiment of the present invention;

7 is a structural block diagram of a multiplex section protection bidirectional switching apparatus according to an example of the present invention;

FIG. 8 is a structural block diagram of a multiplex section protection bidirectional switching apparatus according to another embodiment of the present invention; FIG.

9 is a block diagram showing the structure of a multiplex section protection bidirectional switching system according to an example of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

In this embodiment, a multiplex section protection bidirectional switching method is provided. FIG. 2 is a flowchart of a multiplex section protection bidirectional switching method according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:

Step S201: When detecting the link alarm information generated by the fault of the working link, the first node starts the first protection switching process according to the link alarm information.

3 is a schematic flowchart of a multiplex section protection bidirectional switching method in a unidirectional link failure according to an example of the present invention. As shown in FIG. 3, when a unidirectional link failure occurs in a link, that is, a second node (ie, a node) B) When the link between the first node (ie node A) fails, but the communication link from the first node to the second node is normal, in this step, the link alarm information is link SF or SD Alarm information. The alarm detecting unit of the first node detects the link alarm information, and reports the link alarm information to the alarm processing unit of the local node. When the node alarm processing unit determines that the link alarm information is the link SF or SD alarm information, first Forwarding the link alarm information to the switching control unit of the local node, and feeding back the alarm information to the second node, because the link sent by the first node to the second node is normal, and the alarm information sent to the second node is transmitted to the second node. After receiving the link SF or SD alarm information forwarded by the alarm processing unit, the switching control unit of the first node starts the protection protocol calculation, and delivers protection switching processing to complete the traffic switching.

When the link unidirectional link is faulty and the link is normal, that is, when the link fault between the second node and the first node disappears, in this step, the link alarm disappears as the link SF or SD alarm disappears. information. The alarm detecting unit of the first node detects the link SF or SD alarm disappearing information, and reports the link alarm disappearing information to the alarm processing unit of the local node, and the node alarm processing unit determines that the link alarm disappearing information is the link SF or When the SD alarm disappears, the link alarm disappearing information is first forwarded to the switching control unit of the local node, and the second node is fed back the RDI or REI alarm disappearing information, because the link sent by the first node to the second node is normal. The RDI or REI alarm disappearance information to the second node is passed to the second node. The switching control unit of the first node starts the protection protocol calculation after receiving the link SF or SD alarm disappearing information forwarded by the alarm processing unit, and sends a protection switching process to complete the traffic switching.

In step S202, the first node sends the RDI or REI alarm information to the second node, so that the second node starts the first protection switching process according to the RDI or REI alarm information, where the first protection switching process is a link for transmitting data between the first node and the second node is switched from the working link to the protection link, where the working link and the protection link are between the first node and the second node. link.

In this step, in conjunction with FIG. 3, the first node sends RDI or REI alarm information to the second node, and the alarm detecting unit of the second node detects the RDI or REI alarm information fed back by the first node, and then alerts the RDI or REI. The information is forwarded to the alarm processing unit. When the alarm processing unit determines that the RDI or REI alarm information is generated, the RDI or REI alarm information is forwarded to the switching control unit of the second node, and the switching control unit receives the RDI forwarded by the second node alarm processing unit. After the REI alarm information is generated, the protection protocol calculation is started, and the protection switching process is delivered, and the traffic switching is also completed, thereby completing the bidirectional switching of the MSP.

When the link returns to normal, the first node feeds back the RDI or REI alarm disappearing information to the second node, and the second node alarm detecting unit detects the RDI or REI alarm disappearing information fed back by the first node, and then the RDI or REI alarm is generated. The disappearing information is forwarded to the alarm processing unit, and the alarm processing list is When the element is judged to be the RDI or REI alarm disappearing information, the RDI or REI alarm disappearing information is forwarded to the switching control unit of the second node, and the switching control unit starts after receiving the RDI or REI alarm disappearing information forwarded by the second node alarm processing unit. The protection protocol is calculated, and the protection switching process is delivered, and the traffic switching is also completed, thereby completing the bidirectional switching of the MSP. The first protection switching process is to switch a link for transmitting data between the first node and the second node from the working link to a protection link, where the working link and the protection link are the first The link between the node and the second node described above.

The Chinese meaning in the English abbreviation in the drawing means A: adapter; Ap: protection adapter; TT: path terminal; TTp: protection path terminal; Trail_P: protection link; Trail_W: working link; NC_P: protection subnet connection; NC_W: working subnet connection; SD: signal degradation; SF: signal failure; RDI: remote defect indication; REI: remote error indication.

The method used in the embodiment of the present invention can implement the bidirectional switching of the MSP without the K1/K2 byte information interaction, and obtain the sending direction by detecting the RDI or REI alarm disappearing information fed back to the upstream node by the node receiving the link failure. The link fault information starts the protection protocol calculation according to the detected RDI or REI alarm disappearance information, and performs a switching action, thereby implementing the MSP bidirectional switching, and compensating the cross-device multiplexing section in the related technology compared with the prior art. The problem of the switching mode is complicated and easy to be faulty in the MSP bidirectional switching method, so that the multiplex section protection bidirectional switching can be implemented without K1/K2 byte interaction in the MSP bidirectional switching, thereby reducing the complexity of the switching and improving the complexity. Switching efficiency.

In this embodiment, a multiplex section protection bidirectional switching method is provided. FIG. 4 is a flowchart of a multiplex section protection bidirectional switching method according to an example of the present invention. As shown in FIG. 4, the process includes the following steps:

Step S401, the second node receives the RDI or REI alarm information sent by the first node, where the RDI or REI alarm information is used to indicate that the first node detects the link alarm information generated by the fault of the working link, and Initiating a first protection switching process;

In this step, in conjunction with FIG. 3, when a unidirectional link failure occurs in the link, that is, the link between the second node (ie, Node B) to the first node (ie, node A) fails, but from the first When the communication link from the node to the second node is normal, the link alarm information is link SF or SD alarm information. The alarm detecting unit of the first node detects the link SF or SD alarm information, and reports the link alarm information to the alarm processing unit of the local node. The node alarm processing unit determines that the link alarm information is the link SF or SD alarm information. The link alarm information is first forwarded to the switching control unit of the local node, and the second node is fed back the RDI or REI alarm information, because the link sent by the first node to the second node is normal, and the RDI is sent to the second node. Or the REI alarm message is passed to the second node. After receiving the link alarm information forwarded by the alarm processing unit, the switching control unit of the first node starts the protection protocol calculation, and delivers protection switching processing to complete the traffic switching. Therefore, when the second node receives the RDI or REI alarm information, it indicates that the first node has detected the link alarm information generated by the fault of the working link, and the first protection switching process has been started. The first node sends the RDI or REI alarm information to the second node, and after detecting the RDI or REI alarm information sent by the first node, the alarm detecting unit of the second node forwards the alarm information to the alarm processing unit, and the alarm processing unit determines that When the RDI or REI alarm information is sent, the alarm information is forwarded to the switching control unit of the second node, and the switching control unit receives the RDI or REI alarm information forwarded by the second node alarm processing unit, starts the protection protocol calculation, and delivers the protection switching. Processing, also completes the flow switching, thereby completing the bidirectional switching of the MSP.

When the link is restored, the alarm detection unit of the first node detects the link SF or SD alarm disappearance information, and reports the link alarm information to the alarm processing unit of the local node, and the local node alarm processing unit determines the link alarm information. When the link SF or SD alarm disappears, the link alarm disappearing information is first forwarded to the switching control unit of the local node, and the second node is fed back the RDI or REI alarm disappearing information, because the first node sends the second node to the second node. The link is also normal, and the RDI or REI alarm disappearance message sent to the second node is transmitted to the second node. The switching control unit of the first node starts the protection protocol calculation after receiving the link alarm disappearing information forwarded by the alarm processing unit, And the protection switching process is delivered to complete the traffic switching. The first node sends the RDI or REI alarm disappearing information to the second node, and the alarm detecting unit of the second node detects the RDI or REI alarm disappearing information sent by the first node, and then forwards the alarm disappearing information to the alarm processing unit, and the alarm processing is performed. When the unit determines that the RDI or REI alarm disappears, the alarm disappearance information is forwarded to the switching control unit of the second node, and the switching control unit starts the protection protocol calculation after receiving the RDI or REI alarm disappearing information forwarded by the second node alarm processing unit. And the protection switching process is delivered, and the traffic switching is also completed, thereby completing the bidirectional switching of the MSP.

Step S402, the second node starts a first protection switching process according to the RDI or REI alarm information, where the first protection switching process is to use a link between the first node and the second node for transmitting data. The working link is switched to the protection link, and the working link and the protection link are links between the first node and the second node.

In this step, in conjunction with FIG. 3, the first node sends RDI or REI alarm information to the second node, and the alarm detecting unit of the second node detects the RDI or REI alarm information fed back by the first node, and then alerts the RDI or REI. The information is forwarded to the alarm processing unit. When the alarm processing unit determines that the RDI or REI alarm information is generated, the RDI or REI alarm information is forwarded to the switching control unit of the second node, and the switching control unit receives the forwarding of the second node B alarm processing unit. After the RDI or REI alarm information is generated, the protection protocol calculation is started, and the protection switching process is delivered, and the traffic switching is also completed, thereby completing the bidirectional switching of the MSP.

When the link returns to normal, the first node sends an RDI or REI alarm disappearing message to the second node, and the second node alarm detecting unit detects the RDI or REI alarm disappearing information fed back by the first node, and then the RDI or REI alarm is generated. The disappearing information is forwarded to the alarm processing unit. When the alarm processing unit determines that the RDI or REI alarm disappears, the RDI or REI alarm disappearing information is forwarded to the switching control unit of the second node, and the switching control unit receives the second node B alarm processing. After the RDI or REI alarm disappeared by the unit, the protection protocol calculation is started, and the protection switching process is delivered, and the traffic switching is also completed, thereby completing the bidirectional switching of the MSP.

According to the present invention, the second node receives the RDI or REI alarm information sent by the first node, where the RDI or REI alarm information is used to indicate that the first node detects the link alarm information generated by the fault of the working link, And the first protection switching process is started; the second node starts the first protection switching process according to the RDI or REI alarm information, and solves the problem that the switching mode of the MSP bidirectional switching method is complicated and prone to failure in the cross-device multiplex section protection in the related art. The problem is that the multiplex section protection bidirectional switching can be implemented without performing K1/K2 byte interaction in the MSP bidirectional switching, thereby reducing the complexity of the switching and improving the switching efficiency.

Based on the technical solutions of the foregoing embodiments, the foregoing technical solutions are described in detail below in conjunction with an embodiment.

In this embodiment, a method for protecting a bidirectional switching method in a bidirectional link failure is provided, and FIG. 5 is a schematic flowchart of a bidirectional link failure method in a bidirectional link failure according to an embodiment of the present invention. As shown in FIG. 5, the method specifically includes the following steps:

A: The alarm detecting unit of the first node detects the link alarm information, and reports the link alarm information to the alarm processing unit of the node.

B: The alarm processing unit of the first node determines that the alarm information is link alarm information, first forwards the link alarm information to the switching control unit of the local node, and simultaneously sends the RDI or REI alarm information to the second node, because the fault is a two-way chain. In the case of a road failure, the RDI or REI alarm information sent to the second node cannot be transmitted to the second node.

C: The switching control unit of the first node starts the protection protocol calculation after receiving the link alarm information forwarded by the alarm processing unit, and sends a protection switching process to complete the traffic switching.

D: The switching control unit of the second node starts the protection protocol calculation after receiving the RDI or REI alarm information forwarded by the alarm processing unit of the node, and issues a protection switching action, and also completes the traffic switching, thereby implementing the bidirectional switching of the MSP.

The method used in the embodiment of the present invention can implement the bidirectional switching of the MSP without the K1/K2 byte information interaction, and the RDI fed back to the upstream node by detecting the node receiving the link failure. Or the REI alarm information, to obtain the information of the link direction fault in the sending direction, start the protection protocol calculation according to the detected RDI or REI alarm information, and perform the switching action, thereby realizing the MSP bidirectional switching, which is compensated compared with the prior art. In the related art, the cross-device multiplex section protects the MSP bidirectional switching method from being complicated and prone to failure, so that the multiplex section protection bidirectional switching can be implemented without performing K1/K2 byte interaction in the MSP bidirectional switching. Thereby reducing the complexity of switching and improving the switching efficiency.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is more Good implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods of various embodiments of the present invention.

The following embodiments provide a multiplex section protection bidirectional switching device. The following devices are used to implement the foregoing embodiments and preferred embodiments, and are not described again. As used below, the term "module" may implement a combination of software or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

In the present example, a multiplex section protection bidirectional switching device is also provided. FIG. 6 is a structural block diagram of a multiplex section protection bidirectional switching apparatus according to an embodiment of the present invention. As shown in FIG. 6, the apparatus includes:

The first processing module 61 is configured to: when detecting the link alarm information generated by the fault of the working link, start the first protection switching process according to the link alarm information;

The first sending module 62 is connected to the first processing module 61 and configured to send to the second node. And the RDI or REI alarm information, so that the second node starts the first protection switching process according to the RDI or REI alarm information, where the first protection switching process is used between the first node and the second node. The link for transmitting data is switched from the working link to the protection link, and the working link and the protection link are links between the first node and the second node.

In an embodiment of the present invention, the apparatus further includes a second processing module 63 configured to detect, after detecting the link alarm information generated by the fault of the working link, when the fault recovery of the working link is detected. When the link alarm disappears, the first node starts the second protection switching process according to the link alarm disappearing information;

The second sending module 64 is connected to the second processing module 63, and configured to send the RDI or REI alarm disappearing information to the second node, so that the second node starts the second protection switching process according to the RDI or REI alarm disappearing information. The second protection switching process is to switch a link for transmitting data between the first node and the second node from the protection link to the working link.

In the embodiment of the present invention, the specific processing procedure of the second node and the first node is consistent with the process in the foregoing method embodiment, and details are not described herein again. The embodiment of the present invention can realize the bidirectional switching of the MSP without the K1/K2 byte information interaction through the comprehensive action of the first processing module 61, the second sending module 62, the second processing module 63, and the second sending module 64. Detecting the RDI or REI alarm information fed back to the upstream node by the node receiving the link fault, obtaining the information of the link direction fault in the sending direction, starting the protection protocol calculation according to the detected RDI or REI alarm information, and performing the switching action, thereby implementing Compared with the prior art, the MSP bidirectional switching compensates for the problem that the switching mode of the MSP bidirectional switching method in the cross-device multiplex section protection in the related art is complicated and prone to failure, so that K1/K2 is not required in the MSP bidirectional switching. The byte interaction can realize the multiplex section protection bidirectional switching, thereby reducing the complexity of the switching and improving the switching efficiency.

In this example, a multiplex section protection bidirectional switching device is also provided, and FIG. 7 is according to the present invention. The structural block diagram of the multiplex section protection bidirectional switching device of the example is shown in FIG. 7, the device includes:

The first receiving module 71 is configured to receive the RDI or REI alarm information sent by the first node, where the RDI or REI alarm information is used to indicate that the first node detects the link alarm information generated by the fault of the working link. And starting the first protection switching process;

The third processing module 72 is connected to the receiving module 71, and configured to start the first protection switching process according to the RDI or REI alarm information, where the first protection switching process is used between the first node and the second node. The link for transmitting data is switched from the working link to the protection link, and the working link and the protection link are links between the first node and the second node.

In an embodiment of the present invention, the apparatus further includes: a second receiving module 73, configured to receive, after the second node receives the RDI or REI alarm information sent by the first node, the RDI or REI alarm sent by the first node The disappearing information, wherein the RDI or REI alarm disappearing information is used to indicate that the first node detects the link alarm disappearing information generated by the fault recovery of the working link, and starts the second protection switching process;

The fourth processing module 74 is connected to the second receiving module 73, and configured to start the second protection switching process according to the RDI or REI alarm disappearing information, wherein the second protection switching process is to use the first node and the second The link between the nodes for transmitting data is switched from the above protection link to the above working link.

In the embodiment of the present invention, the specific processing procedure of the second node and the first node is consistent with the process in the foregoing method embodiment, and details are not described herein again. Through the combination of the first receiving module 71, the third processing module 72, the second receiving module 73, and the fourth processing module 74, the embodiment of the present invention can realize the bidirectional switching of the MSP without the K1/K2 byte information interaction. Detecting the RDI or REI alarm information fed back to the upstream node by the node receiving the link fault, obtaining the information of the link direction fault in the sending direction, starting the protection protocol calculation according to the detected RDI or REI alarm information, and performing the switching action, thereby implementing MSP bidirectional switching, compared with the prior art, make up the relevant technology The intra-process cross-device multiplex section protects the MSP bidirectional switching method from the complicated switching mode and is prone to failure. In this way, the multiplex section protection bidirectional switching can be realized without K1/K2 byte interaction in the MSP bidirectional switching. Reduce the complexity of switching and improve switching efficiency.

In practical applications, the multiplex section protects functions implemented by each unit in the bidirectional switching device, and may be a central processing unit (CPU) or a microprocessor located in the multiplex section protection bidirectional switching device. (MPU, Micro Processor Unit), or digital signal processor (DSP, Digital Signal Processor), or Field Programmable Gate Array (FPGA).

In the present example, a multiplex section protection bidirectional switching device is also provided. FIG. 8 is a structural block diagram of a multiplex section protection bidirectional switching apparatus according to another embodiment of the present invention. As shown in FIG. 8, the apparatus includes:

The alarm detecting unit 81 is configured to detect link SF or SD alarm information, and forward the link SF or SD alarm information to the alarm processing unit.

The alarm processing unit 82 is connected to the alarm detecting unit 81 and configured to receive the link SF or SD alarm information reported by the alarm detecting unit, and then determine the switching control of the alarm to the local node if the link SF or the SD alarm information is sent. The unit simultaneously feeds back the RDI or REI alarm information to the upstream node. If it is an RDI or REI alarm message, it is directly forwarded to the switching control unit of the node.

The switching control unit 83 is connected to the alarm processing unit 82, and is configured to receive the link SF or SD alarm information or the RDI or REI alarm information fed back, and then start the protection protocol calculation and perform a protection switching operation.

In the embodiment of the present invention, the integrated action of the alarm detecting unit 81, the alarm processing unit 82, and the switching control unit 83 can realize the bidirectional switching of the MSP without the K1/K2 byte information interaction, and the upstream of the node that detects the failure of the receiving link. The RDI or REI alarm information fed back by the node is used to obtain the information of the link failure in the transmission direction, and the protection protocol calculation is started according to the detected RDI or REI alarm information, and the switching operation is performed, thereby implementing the MSP bidirectional switching, and the prior art Compared with the cross-device multiplex section protection in the related art, the MSP bidirectional switching method has a complicated switching mode and is prone to failure, thereby enabling multiplexing in the MSP bidirectional switching without K1/K2 byte interaction. Segment protection bidirectional switching, which reduces the complexity of switching and improves the switching efficiency.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination. The forms are located in different processors.

In practical applications, the functions implemented by each unit in the multiplex section protection bidirectional switching device can be implemented by a CPU, an MPU, or a DSP, or an FPGA, etc., located in the multiplex section protection bidirectional switching device.

In the present example, a multiplex section protection bidirectional switching system is further provided. FIG. 9 is a structural block diagram of a multiplex section protection bidirectional switching system according to an example of the present invention. As shown in FIG. 9, the system includes: a first node 91. And a second node 92, wherein

When the first node 91 detects the link alarm information generated by the fault of the working link, the first protection switching process is started according to the link alarm information.

The first node 91 sends the RDI or REI alarm information to the second node 92, so that the second node 92 starts the first protection switching process according to the RDI or REI alarm information, where the first protection switching process is The link for transmitting data between the first node 91 and the second node 92 is switched from the working link to the protection link, and the working link and the protection link are the first node 91 and the second node. The link between nodes 92.

The system of the embodiment of the present invention can realize the bidirectional switching of the MSP without the K1/K2 byte information interaction through the combined action of the first node 91 and the second node 92, and feedback to the upstream node by detecting the node receiving the link failure. The RDI or REI alarm information is used to obtain the information of the link failure in the transmission direction, and the protection protocol calculation is started according to the detected RDI or REI alarm information, and the switching operation is performed, thereby implementing the MSP bidirectional switching, which is compensated compared with the prior art. Related The cross-device multiplex section in the technology protects the MSP bidirectional switching method from the problem that the switching mode is complicated and prone to failure, so that the multiplex section protection bidirectional switching can be realized without performing K1/K2 byte interaction in the MSP bidirectional switching. Reduce the complexity of switching and improve switching efficiency.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions. A computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

Correspondingly, an embodiment of the present invention further provides a computer storage medium, wherein a computer program is configured, and the computer program is configured to perform a multiplex section protection bidirectional switching method according to an embodiment of the present invention.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

Claims

A multiplex section protection bidirectional switching method includes:

When detecting the link alarm information generated by the fault of the working link, the first node starts the first protection switching process according to the link alarm information;

The first node sends a remote defect indication RDI or a remote error indication REI alarm information to the second node, so that the second node starts the first protection switching process according to the RDI or REI alarm information, where The first protection switching process is to switch a link for transmitting data between the first node and the second node from the working link to a protection link, the working link and the protection The link is a link between the first node and the second node.
The method of claim 1, wherein after detecting the link alarm information generated by the fault of the working link, the method further comprises:

When detecting the link alarm disappearing information generated by the fault recovery of the working link, the first node starts a second protection switching process according to the link alarm disappearing information;

Sending, by the first node, RDI or REI alarm disappearing information to the second node, so that the second node starts the second protection switching process according to the RDI or REI alarm disappearing information, where the second node The protection switching process is to switch a link for transmitting data between the first node and the second node from the protection link to the working link.
The method according to claim 1 or 2, wherein the link alarm information is link SF or SD alarm information.
A multiplex section protection bidirectional switching method includes:

The second node receives the RDI or REI alarm information sent by the first node, where the RDI or REI alarm information is used to indicate that the first node detects the link alarm information generated by the fault of the working link, and Initiating a first protection switching process;

The second node starts the first protection switching process according to the RDI or REI alarm information, The first protection switching process is to switch a link for transmitting data between the first node and the second node from the working link to a protection link, where the working link and the The protection link is a link between the first node and the second node.
The method according to claim 4, wherein after the second node receives the RDI or REI alarm information sent by the first node, the method further includes:

The second node receives the RDI or REI alarm disappearance information sent by the first node, where the RDI or REI alarm disappearance information is used to indicate that the first node detects the fault recovery of the working link. The generated link alarm disappears information, and the second protection switching process is started;

The second node starts the second protection switching process according to the RDI or REI alarm disappearing information, where the second protection switching process is used for transmitting between the first node and the second node. A link of data is switched from the protection link to the working link.
The method according to claim 4 or 5, wherein the link alarm information is link SF or SD alarm information.
A multiplex section protection bidirectional switching device is applied to the first node, including:

The first processing module is configured to: when detecting the link alarm information generated by the fault of the working link, start the first protection switching process according to the link alarm information;

The first sending module is configured to send RDI or REI alarm information to the second node, so that the second node starts the first protection switching process according to the RDI or REI alarm information, where the first protection switching Processing to switch a link for transmitting data between the first node and the second node from the working link to a protection link, where the working link and the protection link are A link between a node and the second node.
The apparatus of claim 7 wherein said apparatus further comprises:

a second processing module, configured to detect, after detecting the link alarm information generated by the fault of the working link, detecting the link alarm generated by the fault recovery of the working link When the information is lost, the first node starts the second protection switching process according to the link alarm disappearing information;

The second sending module is configured to send the RDI or REI alarm disappearing information to the second node, so that the second node starts the second protection switching process according to the RDI or REI alarm disappearing information, where The second protection switching process is to switch a link for transmitting data between the first node and the second node from the protection link to the working link.
A multiplex section protection bidirectional switching device is applied to the second node, including:

The first receiving module is configured to receive the RDI or REI alarm information sent by the first node, where the RDI or REI alarm information is used to indicate that the first node detects that the working link is faulty. Alarm information, and the first protection switching process is started;

a third processing module, configured to start a first protection switching process according to the RDI or REI alarm information, where the first protection switching process is used to transmit data between the first node and the second node The link is switched from the working link to the protection link, and the working link and the protection link are links between the first node and the second node.
The apparatus of claim 9 wherein said apparatus further comprises:

The second receiving module is configured to receive, after the second node receives the RDI or REI alarm information sent by the first node, the RDI or REI alarm disappearance information sent by the first node, where the RDI or REI alarm disappears The information is used to indicate that the first node detects the link alarm disappearing information generated by the fault recovery of the working link, and starts a second protection switching process;

The fourth processing module is configured to start the second protection switching process according to the RDI or REI alarm disappearing information, where the second protection switching process is used between the first node and the second node A link for transmitting data is switched from the protection link to the working link.
A multiplex section protection bidirectional switching system includes: a first node and a second node, where

When the first node detects the link alarm information generated by the fault of the working link, the first protection switching process is started according to the link alarm information;

Sending, by the first node, RDI or REI alarm information to the second node, so that the second node starts the first protection switching process according to the RDI or REI alarm information, where the first protection switching Processing to switch a link for transmitting data between the first node and the second node from the working link to a protection link, where the working link and the protection link are A link between a node and the second node.
The system according to claim 11, wherein said first node detects said failure recovery of said working link after said first node detects link alarm information generated by a failure of a working link When the generated link alarm disappears, the first node starts the second protection switching process according to the link alarm disappearing information;

Sending, by the first node, RDI or REI alarm disappearing information to the second node, so that the second node starts the second protection switching process according to the RDI or REI alarm disappearing information, where the second node The protection switching process is to switch a link for transmitting data between the first node and the second node from the protection link to the working link.
A computer storage medium storing computer executable instructions configured to perform the multiplex section protection bidirectional switching method according to any one of claims 1-3, or claim 4 The multiplex section protection bidirectional switching method according to any one of the items -6.