CN104734865A - Network protection method for PTN (Packet Transport Network), device and network element device - Google Patents
Network protection method for PTN (Packet Transport Network), device and network element device Download PDFInfo
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Abstract
The embodiment of the invention discloses a network protection method for a PTN (Packet Transport Network). The method comprises steps: a first network element device is sure to generate error code alarms, and the generated error code alarms are accumulated; and when the error code alarms are accumulated to a first preset threshold, tunnel switching is triggered. The embodiment of the invention also discloses a PTN network protection device and a network element device. By adopting the technical scheme of the embodiment of the invention, when an error code happens to a network line but the packet service performance is not influenced, the line is changed timely, and flash of service can be prevented.
Description
Technical Field
The present invention relates to an optical communication technology, and in particular, to a network protection method, device, and network element device for a Packet Transport Network (PTN).
Background
In the PTN, a Multiplex Section Protection (MSP) is usually adopted as a Protection mechanism, and the principle is to set a Protection path, and switch a service to the Protection path when a working path fails.
The management work of the network mainly comprises three types: operation (Operation), management (Administration), Maintenance (Maintenance), OAM for short; the OAM mechanism in the PTN mainly includes an alarm detection mechanism and a performance detection mechanism, the performance detection mechanism in the existing PTN is not perfect, and when a network line has an error code but does not affect the performance of a packet service, the network line cannot be switched, which may cause the service carried by the network to be flashed.
Disclosure of Invention
In order to solve the existing technical problem, embodiments of the present invention provide a network protection method, apparatus and network element device for a PTN, which can switch a line in time when a network line has an error code but does not affect the performance of a packet service, so as to prevent a service from being flashed.
In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:
the embodiment of the invention provides a PTN network protection method, which comprises the following steps:
the first network element equipment determines to generate error code alarm and accumulates the generated error code alarm;
and triggering tunnel switching when the error code alarm accumulation is determined to reach a first preset threshold value.
In the above scheme, the determining, by the first network element device, that an error code alarm is generated includes:
the first network element equipment detects error codes and accumulates the detected error codes; and when the error code is determined to be accumulated to a second preset threshold value, the error code alarm is determined to be generated.
In the above scheme, the determining, by the first network element device, that an error code alarm is generated includes:
the first network element equipment receives an alarm message sent by the intermediate network element equipment and determines to generate error code alarm; the alarm message includes error code information and packet loss information.
In the above scheme, the receiving, by the first network element device, the alarm packet sent by the intermediate network element device includes:
the intermediate network element equipment detects error codes and accumulates the detected error codes; and when the error code accumulation is determined to reach a second preset threshold value, sending an alarm message to the first network element equipment.
In the foregoing solution, the triggering tunnel switching includes:
and the first network element equipment sends a switching instruction to second network element equipment, and the second network element equipment is instructed to send a message to the first network element equipment through the standby intermediate network element equipment.
The embodiment of the invention also provides a network protection device of the PTN, and the device comprises: the alarm processing module is used for processing the alarm; wherein,
the alarm determining module is used for determining error code alarm generation;
and the alarm processing module is used for accumulating the error code alarms determined by the alarm determining module and triggering tunnel switching when the error code alarms are determined to be accumulated to a first preset threshold value.
In the foregoing solution, the alarm determining module includes: a detection submodule and a determination submodule; wherein,
the detection submodule is used for detecting error codes;
and the determining submodule is used for accumulating the error codes detected by the detecting submodule, and determining that error code alarm is generated when the error codes are accumulated to a second preset threshold value.
In the above scheme, the alarm determining module further includes a receiving sub-module, configured to receive an alarm message sent by an intermediate network element device, where the alarm message includes error code information and packet loss information;
correspondingly, the determining submodule is further configured to determine that an error code alarm is generated when the receiving submodule receives an alarm message.
In the foregoing solution, the alarm processing module is further configured to send a switching instruction to a second network element device, and instruct the second network element device to send a message to the first network element device through a standby intermediate network element device.
The embodiment of the invention also provides a PTN network protection device, which comprises a detection module and a sending module; wherein,
the detection module is used for detecting error codes;
and the sending module is used for accumulating the error codes detected by the detection module and sending an alarm message when the error codes are determined to be accumulated to a second preset threshold value.
An embodiment of the present invention further provides a network element device, where the network element device includes the PTN network protection apparatus according to the embodiment of the present invention, and the network protection apparatus includes: the alarm processing device comprises an alarm determining module and an alarm processing module.
An embodiment of the present invention further provides a network element device, where the network element device includes the PTN network protection apparatus according to the embodiment of the present invention, and the network protection apparatus includes: the device comprises a detection module and a sending module.
According to the technical scheme provided by the embodiment of the invention, the error code alarm is determined to be generated through the first network element equipment, and the generated error code alarm is accumulated; when the error code alarm accumulation is determined to reach the first preset threshold value, the tunnel switching is triggered, so that the circuit is switched in time when the error code occurs in the network circuit but the performance of the packet service is not influenced, and the service is prevented from being flashed.
Drawings
FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a network protection method of the PTN according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a first application scenario according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a second application scenario according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a third application scenario according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a network protection device of a PTN according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a network protection device of a PTN according to another embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention; as shown in fig. 1, this embodiment includes a first network element device 11 and a second network element device 16, where a data packet is sent from the second network element device 16 to the first network element device 11, where the first network element device 11 and the second network element device 16 further include at least two intermediate network element devices, where the two intermediate network element devices are a main intermediate network element device and a standby intermediate network element device, respectively, and when a main link normally works, the data packet is forwarded through the main intermediate network element device, and when the main link is abnormal, a tunnel switch is triggered, and the data packet is forwarded through the standby intermediate network element device; the present embodiment includes four intermediate network element devices, where the intermediate network element device 12 and the intermediate network element device 13 are main network element devices, and the intermediate network element device 14 and the intermediate network element device 15 are standby network element devices.
Fig. 1 is a schematic flow chart of a network protection method of a PTN according to an embodiment of the present invention; as shown in fig. 1, the method comprises the following steps:
step 101: the first network element device determines to generate an error code alarm.
Here, the first network element device determines that error code alarm is generated, and accumulates the detected error codes according to the error codes detected by the first network element device; when the error code is determined to be accumulated to a second preset threshold value, the error code alarm is determined to be generated; the method can also receive an alarm message sent by the intermediate network element equipment and determine that error code alarm is generated; wherein, the alarm message includes: node number, error code information, packet loss information.
In this embodiment, the alarm message sent by the intermediate network element device is obtained by detecting error codes through the intermediate network element device and accumulating the detected error codes; and when the error code accumulation is determined to reach a second preset threshold value, sending an alarm message to the first network element equipment.
When the first network element device and the intermediate network element device are connected through a physical port, whether an error code occurs in a data packet received by the physical port is checked through a Frame Check Sequence (FCS).
The packet error rate can be determined by the ratio of the number of detected error packets to the total number of received data packets within a preset time; the packet loss rate may be determined by a ratio of the number of lost packets detected within a preset time to the total number of transmitted packets.
Step 102: and the first network element equipment accumulates the generated error code alarm.
Here, the first network element device may accumulate the bit error rate and/or the packet loss rate in the error alarm, or may accumulate the bit error rate and/or the packet loss rate in the alarm packet sent by the intermediate network element device.
Step 103: and triggering tunnel switching when the error code alarm accumulation is determined to reach a first preset threshold value.
Here, when the first network element device determines that the error code alarm is accumulated to the first preset threshold, the first network element device sends a switching instruction to the second network element device, and instructs the second network element device to send a message to the first network element device through the standby intermediate network element device.
The network element devices may be end network element devices and intermediate network element devices, and the generation of the error code may be between the end network element devices and the intermediate network element devices, or between the intermediate network element devices and the end network element devices, and the present invention will be further described in detail with reference to specific embodiments according to different positions of error code generation.
The first embodiment is as follows:
FIG. 3 is a diagram illustrating a first application scenario according to an embodiment of the present invention; as shown in fig. 3, this embodiment includes a first network element device 11 and a second network element device 16, where a data packet is sent from the second network element device 16 to the first network element device 11, and the first network element device 11 and the second network element device 16 include four intermediate network element devices, where the intermediate network element device 12 and the intermediate network element device 13 are main network element devices, and the intermediate network element device 14 and the intermediate network element device 15 are standby network element devices. When an error code is detected between the second network element device 16 and the intermediate network element device 13, the network protection method of the PTN in this embodiment includes the following steps:
step 31: the intermediate network element device 13 detects the error code, accumulates the detected error code, and sends an alarm message to the first network element device 11 when determining that the error code is accumulated to a second preset threshold.
Here, the intermediate network element device 13 may check, through the FCS, whether an error occurs in a data packet received by the physical port, and send an alarm message to the first network element device 11 when the error accumulates to a second preset threshold, where the alarm message may include: node number, error rate, packet loss filtering and other information;
the packet error rate can be determined by the ratio of the number of detected error packets to the total number of received data packets within a preset time; the packet loss rate may be determined by a ratio of the number of lost packets detected within a preset time to the total number of transmitted packets.
Step 32: the first network element equipment 11 receives the alarm message sent by the intermediate network element equipment 13, determines to generate error code alarm, and accumulates the generated error code alarm; and triggering tunnel switching when the error code alarm accumulation is determined to reach a first preset threshold value.
Specifically, when the first network element device 11 determines that the error code alarm is accumulated to the first preset threshold, the first network element device sends a switching instruction to the second network element device 16, and instructs the second network element device 16 to send a message to the first network element device 11 through the spare intermediate network element device 15 and the spare intermediate network element device 14.
Example two
FIG. 4 is a diagram illustrating a second application scenario according to an embodiment of the present invention; as shown in fig. 4, this embodiment includes a first network element device 11 and a second network element device 16, where a data packet is sent from the second network element device 16 to the first network element device 11, and the first network element device 11 and the second network element device 16 include four intermediate network element devices, where the intermediate network element device 12 and the intermediate network element device 13 are main network element devices, and the intermediate network element device 14 and the intermediate network element device 15 are standby network element devices; when an error code is detected between the intermediate network element device 13 and the intermediate network element device 12, the network protection method of the PTN in this embodiment includes the following steps:
step 41: the intermediate network element device 12 detects the error code, accumulates the detected error code, and sends an alarm message to the first network element device 11 when determining that the error code is accumulated to a second preset threshold.
Here, the intermediate network element device 12 may check, through the FCS, whether an error occurs in a data packet received by the physical port, and send an alarm message to the first network element device 11 when the error accumulates to a second preset threshold, where the alarm message may include: node number, error rate, packet loss filtering and other information;
the packet error rate can be determined by the ratio of the number of detected error packets to the total number of received data packets within a preset time; the packet loss rate may be determined by a ratio of the number of lost packets detected within a preset time to the total number of transmitted packets.
Step 42: the first network element device 11 receives the alarm message sent by the intermediate network element device 12, determines to generate error code alarm, and accumulates the generated error code alarm; and triggering tunnel switching when the error code alarm accumulation is determined to reach a first preset threshold value.
Specifically, when the first network element device 11 determines that the error code alarm is accumulated to the first preset threshold, the first network element device sends a switching instruction to the second network element device 16, and instructs the second network element device 16 to send a message to the first network element device 11 through the spare intermediate network element device 15 and the spare intermediate network element device 14.
EXAMPLE III
FIG. 5 is a diagram illustrating a third application scenario according to an embodiment of the present invention; as shown in fig. 5, this embodiment includes a first network element device 11 and a second network element device 16, where a data packet is sent from the second network element device 16 to the first network element device 11, and the first network element device 11 and the second network element device 16 include four intermediate network element devices, where the intermediate network element device 12 and the intermediate network element device 13 are main network element devices, and the intermediate network element device 14 and the intermediate network element device 15 are standby network element devices; when an error code is detected between the intermediate network element device 12 and the first network element device 11, the network protection method of the PTN in this embodiment includes the following steps:
step 51: the first network element device 11 detects the error code, accumulates the detected error code, and determines to generate an error code alarm when determining that the error code is accumulated to a second preset threshold.
Here, the first network element device 11 may check, through the FCS, whether an error occurs in the data packet received by the physical port, and determine that an error alarm is generated when the error accumulates to a second preset threshold; wherein the error code alarm may include: node number, error rate, packet loss filtering and other information;
the packet error rate can be determined by the ratio of the number of detected error packets to the total number of received data packets within a preset time; the packet loss rate may be determined by a ratio of the number of lost packets detected within a preset time to the total number of transmitted packets.
Step 52: the first network element device 11 accumulates the generated error code alarm; and triggering tunnel switching when the error code alarm accumulation is determined to reach a first preset threshold value.
Specifically, when the first network element device 11 determines that the error code alarm is accumulated to the first preset threshold, the first network element device sends a switching instruction to the second network element device 16, and instructs the second network element device 16 to send a message to the first network element device 11 through the spare intermediate network element device 15 and the spare intermediate network element device 14.
Fig. 6 is a schematic structural diagram of a network protection device of a PTN according to an embodiment of the present invention, and as shown in fig. 6, the device includes: an alarm determination module 61 and an alarm processing module 62; wherein,
the alarm determining module 61 is configured to determine that an error code alarm is generated;
the alarm processing module 62 is configured to accumulate the error code alarms determined by the alarm determining module 61, and trigger tunnel switching when the error code alarms are determined to be accumulated to a first preset threshold.
Preferably, the alarm determination module 61 includes: a detection sub-module 611 and a determination sub-module 612; wherein,
the detection submodule 611 is configured to detect an error code;
the determining submodule 612 is configured to accumulate the error codes detected by the detecting submodule 611, and determine that an error code alarm is generated when the error codes are accumulated to a second preset threshold.
Preferably, the alarm determining module 61 further includes a receiving submodule 613, configured to receive an alarm message sent by an intermediate network element device, where the alarm message includes error code information and packet loss information;
correspondingly, the determining sub-module 612 is further configured to determine that an error code alarm is generated when the receiving sub-module 613 receives an alarm message.
Preferably, the alarm processing module 62 is further configured to send a switching instruction to a second network element device, and instruct the second network element device to send a message to the first network element device through a standby intermediate network element device.
It should be understood by those skilled in the art that, the functions of each processing module in the network protection device of the PTN according to the embodiment of the present invention may be understood by referring to the foregoing description of the network protection method of the PTN, and each processing module in the network protection device of the PTN according to the embodiment of the present invention may be implemented by an analog circuit that implements the functions described in the embodiment of the present invention, or may be implemented by running software that executes the functions described in the embodiment of the present invention on an intelligent terminal.
The network protection device of the PTN can be realized by end network element equipment in the PTN in practical application; the alarm processing module 62 in the device may be implemented by a Central Processing Unit (CPU) or a Digital Signal Processor (DSP) or a Programmable Gate Array (FPGA); the alarm determination module 61 and its sub-modules in the device: the detection sub-module 611, the determination sub-module 612 and the receiving sub-module 613 can be implemented by a CPU and a receiver in the device.
An embodiment of the present invention further provides a network element device, where the network element device includes a PTN network protection apparatus as shown in fig. 6; the network element equipment is used as end network element equipment, has the error code detection function of a port of the network element equipment, and triggers the switching operation of the protection link when the received alarm message sent by the middle network element equipment is accumulated to a first preset threshold value.
Fig. 7 is a schematic structural diagram of a network protection device of a PTN according to another embodiment of the present invention, and as shown in fig. 7, the device includes: a detection module 71 and a transmission module 72; wherein,
the detection module 71 is configured to detect an error code;
the sending module 72 is configured to accumulate the error codes detected by the detecting module 71, and send an alarm message when it is determined that the error codes are accumulated to a second preset threshold.
It should be understood by those skilled in the art that, the functions of each processing module in the network protection device of the PTN according to the embodiment of the present invention may be understood by referring to the foregoing description of the network protection method of the PTN, and each processing module in the network protection device of the PTN according to the embodiment of the present invention may be implemented by an analog circuit that implements the functions described in the embodiment of the present invention, or may be implemented by running software that executes the functions described in the embodiment of the present invention on an intelligent terminal.
The network protection device of the PTN can be realized by intermediate network element equipment in the PTN in practical application; the detection module 71 in the device may be implemented by a Central Processing Unit (CPU), a Digital Signal Processor (DSP), or a Programmable Gate Array (FPGA); the sending module 72 in the device can be realized by a CPU and a transmitter in the device together in practical application.
An embodiment of the present invention further provides a network element device, where the network element device is an intermediate network element device in a PTN, and the network element device includes a PTN network protection apparatus as shown in fig. 7, and the apparatus includes: a detection module 71 and a transmission module 72; wherein,
the detection module 71 is configured to detect an error code;
the sending module 72 is configured to accumulate the error codes detected by the detecting module 71, and send an alarm message when it is determined that the error codes are accumulated to a second preset threshold.
The network element equipment is used as intermediate network element equipment and only has the error code detection function of a port of the network element equipment, and when the detected error codes are accumulated to a second preset threshold value, an alarm message is sent to the end network element equipment so as to trigger tunnel switching through the end network element equipment.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (12)
1. A network protection method of a packet transport network, PTN, the method comprising:
the first network element equipment determines to generate error code alarm and accumulates the generated error code alarm;
and triggering tunnel switching when the error code alarm accumulation is determined to reach a first preset threshold value.
2. The method of claim 1, wherein the determining, by the first network element device, that the error alarm is generated comprises:
the first network element equipment detects error codes and accumulates the detected error codes; and when the error code is determined to be accumulated to a second preset threshold value, the error code alarm is determined to be generated.
3. The method of claim 1, wherein the determining, by the first network element device, that the error alarm is generated comprises:
the first network element equipment receives an alarm message sent by the intermediate network element equipment and determines to generate error code alarm; the alarm message includes error code information and packet loss information.
4. The method of claim 3, wherein the receiving, by the first network element device, the alarm packet sent by the intermediate network element device comprises:
the intermediate network element equipment detects error codes and accumulates the detected error codes; and when the error code accumulation is determined to reach a second preset threshold value, sending an alarm message to the first network element equipment.
5. The method of claim 1, wherein the triggering the tunnel switch comprises:
and the first network element equipment sends a switching instruction to second network element equipment, and the second network element equipment is instructed to send a message to the first network element equipment through the standby intermediate network element equipment.
6. An apparatus for network protection of a PTN, the apparatus comprising: the alarm processing module is used for processing the alarm; wherein,
the alarm determining module is used for determining error code alarm generation;
and the alarm processing module is used for accumulating the error code alarms determined by the alarm determining module and triggering tunnel switching when the error code alarms are determined to be accumulated to a first preset threshold value.
7. The apparatus of claim 6, wherein the alert determination module comprises: a detection submodule and a determination submodule; wherein,
the detection submodule is used for detecting error codes;
and the determining submodule is used for accumulating the error codes detected by the detecting submodule, and determining that error code alarm is generated when the error codes are accumulated to a second preset threshold value.
8. The apparatus according to claim 6, wherein the alarm determining module further comprises a receiving sub-module, configured to receive an alarm message sent by an intermediate network element device, where the alarm message includes error code information and packet loss information;
correspondingly, the determining submodule is further configured to determine that an error code alarm is generated when the receiving submodule receives an alarm message.
9. The apparatus of claim 6, wherein the alarm processing module is further configured to send a switch instruction to a second network element device, and instruct the second network element device to send a packet to the first network element device through a standby intermediate network element device.
10. A PTN network protection device is characterized in that the device comprises a detection module and a sending module; wherein,
the detection module is used for detecting error codes;
and the sending module is used for accumulating the error codes detected by the detection module and sending an alarm message when the error codes are determined to be accumulated to a second preset threshold value.
11. A network element device, characterized in that it comprises the network protection means of the PTN of any one of claims 6 to 9.
12. A network element device, characterized in that it comprises the network protection means of the PTN of claim 10.
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| CN201310698545.XA CN104734865A (en) | 2013-12-18 | 2013-12-18 | Network protection method for PTN (Packet Transport Network), device and network element device |
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| CN112073285A (en) * | 2019-06-10 | 2020-12-11 | 华为技术有限公司 | Error code notification method and related equipment |
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| CN101719843A (en) * | 2009-12-18 | 2010-06-02 | 烽火通信科技股份有限公司 | Method of LSP linear protection switching in PTN |
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Application publication date: 20150624 |