CN112751696B - Method and system for transmitting in-band SD signal in communication network - Google Patents
Method and system for transmitting in-band SD signal in communication network Download PDFInfo
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- CN112751696B CN112751696B CN201911053144.2A CN201911053144A CN112751696B CN 112751696 B CN112751696 B CN 112751696B CN 201911053144 A CN201911053144 A CN 201911053144A CN 112751696 B CN112751696 B CN 112751696B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0631—Management of faults, events, alarms or notifications using root cause analysis; using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0681—Configuration of triggering conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/22—Alternate routing
Abstract
A method and a system for transmitting an in-band SD signal in a communication network relate to the technical field of communication, and the method comprises the following steps: setting a mark bit for representing an SD alarm state in the CCM message, and sending the CCM message in a non-SD alarm state by default; after receiving the CCM message, the intermediate node with the SD event sets an SD alarm state in the marker bit and forwards the SD alarm state according to a service path; the host node compares the current CCM message with the last CCM message, and if the SD alarm state in the mark bit changes, the service path switching is executed. The whole process of the invention does not need to additionally send AIS messages, thus reducing the occupation of resources by hardware message sending, reducing the occupation of hardware detection and analysis resources, avoiding the occupation of additional network bandwidth and saving the networking cost of a communication network.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a system for transmitting an in-band SD signal in a communication network.
Background
With the high-speed development of communication networks, the scale of the networks is larger and larger, networking is more and more complex, various path protection technologies are required to be adopted to ensure services, the service protection mainly adopts the transmission of CCM (connectivity detection) messages on a main path and a standby path to judge whether the paths are good or bad, when CCM messages are continuously lost, a path fault is judged, and then the services are switched to the standby path.
However, there is a situation that the CCM packet cannot be used for detection in the network, so as to trigger the main/standby switching, that is, an SD (Signal degradation) event, at this time, the CCM packet is not continuously lost, and only one Signal degradation is occasionally lost, so that the main/standby switching cannot be triggered by using the CCM packet for detection in this situation.
The conventional SD trigger switching technique sets a packet loss threshold, detects the number of CCM packets lost at a fixed period, and if the number of CCM packets lost exceeds the SD packet loss threshold, triggers service switching by sending an AIS (Alarm Indication signal) packet to a downstream node, and after receiving the AIS packet, the host node triggers service switching. However, the scheme of implementing SD signal transmission through AIS messages has high requirements on software and hardware of the device, the software needs to analyze services associated with the SD port, and control the transmission enabling of the AIS messages, the nodes on the hardware that generate SD continuously transmit AIS messages with the same service number, the core layer service number of the existing network device reaches 10K + level, the access layer also reaches K level, the transmission of the AIS messages occupies a large amount of resources, and the promotion of service specifications is limited.
Disclosure of Invention
In view of the defects in the prior art, the present invention aims to provide a method and a system for transmitting an in-band SD signal in a communication network, which realize the downstream delivery of the SD signal without adding any device unit.
To achieve the above object, in one aspect, a method for transmitting an in-band SD signal in a communication network is provided, including:
setting a mark bit for representing an SD alarm state in the CCM message, and sending the CCM message in a non-SD alarm state by default;
after receiving the CCM message, the intermediate node with the SD event sets an SD alarm state in the marker bit and forwards the SD alarm state according to a service path;
the host node compares the current CCM message with the last CCM message, and if the SD alarm state in the mark bit changes, the service path switching is executed.
As an optional implementation manner, the intermediate node detects an SD event through a port on the node, and if the SD event occurs, activates a preset message filtering mechanism on the port, intercepts a CCM message sent by a source node, and sets an SD alarm state in a flag bit.
In an alternative embodiment, the flag bits indicate the no-SD alarm state and the SD alarm state respectively with different flags.
As an optional implementation manner, the flag bit is empty when there is no SD alarm state, and is filled with a preset flag when there is an SD alarm state.
As an optional implementation manner, if there is an alarm state in the flag bit of the CCM message currently received by the sink node, and there is no SD alarm state in the flag bit of the last CCM message received, the service is switched from the active path to the standby path.
As an optional implementation manner, if the flag bit of the CCM message currently received by the host node is in the no-alarm state and the flag bit of the previous CCM message received by the host node is in the SD alarm state, the service is switched from the standby path to the primary path.
In another aspect, there is provided a transmission system of an in-band SD signal in a communication network, including:
the setting module is used for setting a mark bit for representing the SD alarm state in the CCM message and defaulting to be the SD-free alarm state;
the judging module is used for judging whether the SD alarm event occurs in the middle node;
the processing module is used for intercepting the received CCM message after the SD alarm event occurs in the middle node, setting the flag bit to be in an SD alarm state and forwarding the flag bit according to the service path;
and the switching module is used for comparing the current CCM message with the last CCM message, and executing service path switching if the SD alarm state in the mark bit changes.
As an optional implementation manner, the processing module includes a message filtering mechanism and a message editing mechanism that are arranged at a port of the node where the processing module is located, and the message filtering mechanism intercepts and captures a CCM message from a source node after an SD alarm event occurs; the message editing mechanism is used for editing the SD alarm state in the CCM message intercepted and captured.
As an optional implementation manner, the no-SD alarm state and the SD alarm state are respectively represented in the flag bit by using different flags; or the mark bit is empty when no SD alarm state exists, and is filled with a preset mark when the SD alarm state exists.
As an optional implementation manner, if the flag bit of the CCM message currently received by the host node is in an alarm state and the flag bit of the previous CCM message received by the host node is in an SD-free alarm state, switching the service from the primary path to the standby path;
if the mark bit of the current CCM message received by the host node is in the state of no alarm and the mark bit of the last CCM message received by the host node is in the state of SD alarm, the service is switched from the standby path to the main path.
The technical scheme has the following beneficial effects:
setting a mark bit for representing the SD alarm state in the CCM message, defaulting to the SD-free alarm state when the CCM message is sent by a source node, and setting the mark bit of the received CCM message as the SD alarm state to continue forwarding by a corresponding intermediate node after an SD event occurs; the host node can execute the service path switching only by changing the SD alarm state in the current and last CCM messages, and does not need to additionally send AIS messages in the whole process, thereby reducing the occupation of hardware message sending on resources, reducing the occupation of hardware detection and analysis resources, avoiding the occupation of additional network bandwidth, saving the networking cost of a communication network and ensuring that the networking protection has more flexibility.
The invention is applicable to a variety of networking types, including ring, chain, star, and mesh networking.
Drawings
Fig. 1 is a flowchart of a method for transmitting an inband SD signal in a communication network according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, a step of providing a method for transmitting an in-band SD signal in a communication network specifically includes, as a first embodiment:
s1, a mark bit used for representing an SD alarm state is set in a CCM message, and the CCM message defaults to a non-SD alarm state when being sent outwards from a source node.
S2, the intermediate node detects whether an SD event occurs through a physical port of the equipment, if so, the process goes to S3; if not, the description is normal, and the process proceeds to S4.
And S3, indicating that the SD event occurs, wherein the intermediate node of the SD event receives the CCM message, and the SD alarm state is set in the mark bit.
And S4, forwarding by adopting the same path addressing mode as the service message.
And after receiving the CCM message, the host node of the S5 service compares the current CCM message with the last CCM message, and if the SD alarm state in the marker bit changes, the service path switching is executed.
Specifically, in step S3, after the port detects that the SD event occurs, a preset message filtering mechanism on the port is activated, the port obtains a CCM message sent by the source node through the filter, then analyzes a flag bit in the obtained CCM message, sets the SD alarm state in the flag bit to be the SD alarm state, and forwards the message in the same path addressing manner as the service message.
Based on the first embodiment, an embodiment is provided in which the no-SD alarm state and the SD alarm state are respectively indicated by different flags in the flag bit, as a second embodiment. For example, a bit in the CCM message is set as a flag bit, and 0 is used to represent a no SD alarm state, and 1 is used to represent an SD alarm state. In step S1, when the CCM packet is sent out from the service source node, the flag bit is set to 0 by default. In step S3, after the CCM packet is acquired by the intermediate node having the SD event, 0 in the flag bit is set to 1, which indicates that there is an SD alarm state.
Based on the second embodiment, an embodiment is provided in which after receiving a CCM packet, a sink node of a service performs content analysis on the CCM packet, as a third embodiment.
If the flag bit in the currently received CCM message is 1 and the flag bit in the last received CCM message is 0, it indicates that an SD event occurs and it is necessary to perform service path switching; and the flag bit is changed from 0 to 1, which indicates that the service is currently working on the primary path and the service of the primary path needs to be switched to the standby path.
If the flag bit in the currently received CCM message is 0 and the flag bit in the last received CCM message is 1, it indicates that the link has been restored and the service path switching needs to be performed, and the flag bit is changed from 1 to 0, which indicates that the service is currently working on the standby path and the service of the standby path needs to be switched back to the main path.
If the flag bit in the currently received CCM message is 1 and the flag bit in the last received CCM message is 1, it indicates that an SD event occurs, the link is not recovered, switching is not needed, and the current working path of the service is kept unchanged.
If the flag bit in the currently received CCM message is 0 and the flag bit in the last received CCM message is 0, it indicates that no SD event occurs, and no switching is required, so that the service network is currently maintained in the primary working path.
Based on the first embodiment, another embodiment of representing the SD alarm state in the flag bit is provided as a fourth embodiment. In this embodiment, in step S1, when the CCM packet is sent out from the service source node, the flag bit is empty, and no flag is filled in the CCM packet, so that the non-SD alarm state is indicated. In step S3, after the intermediate node that has generated the SD event obtains the CCM packet, a predetermined flag is filled in the flag bit to indicate that there is an SD alarm state.
Based on the fourth embodiment, a fifth embodiment is provided, which illustrates a process of performing content analysis on a CCM packet after a CCM packet is received by a service destination node.
If the mark bit of the currently received CCM message has a preset mark and the mark bit of the last received CCM message is null, it indicates that an SD event occurs, and it is necessary to perform service path switching, and it is necessary to switch the service of the primary path to the backup path.
If the mark bit of the currently received CCM message is empty and the mark bit of the last received CCM message has a preset mark, it indicates that the SD event has been recovered before, and the service of the standby path needs to be switched back to the active path.
If the preset mark exists in the mark bit of the currently received CCM message and the preset mark exists in the mark bit of the last received CCM message, the SD event is shown to occur, the link is not recovered, the switching is not needed, and the current working path of the service is kept unchanged.
If the mark bit of the currently received CCM message is null and the mark bit of the last received CCM message is null, it indicates that no SD event occurs, and no switching is needed, so that the service network is kept in the current main working path.
In order to implement the above embodiments in real time, a transmission system of an in-band SD signal in a communication network is provided as a sixth embodiment. In this embodiment, the transmission system includes a setting module, a determining module, a processing module, and a switching module, and each node is provided with the determining module, the processing module, and the switching module.
And the setting module is used for setting a mark bit for representing the SD alarm state in the CCM message, and defaults to a non-SD alarm state when the mark bit is sent outwards by a service source node.
And the judging module is arranged on each intermediate node and used for judging whether the intermediate node has an SD alarm event.
And the processing module is arranged at each intermediate node and used for intercepting the received CCM message after the node generates the SD alarm event, editing the marker bit to have the SD alarm state and forwarding the SD alarm state according to the service path.
And the switching module is arranged at each node, is used for comparing the currently received CCM message with the last received CCM message when the node is used as a service destination node, and executes service path switching if the SD alarm state in the marker bit changes.
Specifically, the processing module comprises a message filtering mechanism and a message editing mechanism which are arranged on the port of the node, wherein the message filtering mechanism intercepts a CCM message from a source node after an SD alarm event occurs; and the message editing mechanism is used for editing the SD alarm state in the CCM message. The message filtering mechanism can be realized by adopting a filter, the message editing mechanism can be realized by adopting an editor, the message filtering mechanism and the message editing mechanism are added on hardware, the filtering enabling of the CCM message is only controlled on software, the correlation of services does not need to be analyzed again, and the software complexity is greatly reduced.
When the setting module sets the flag bit, two different flags may be used to respectively indicate the SD-free alarm state and the SD-with alarm state, for example, 0 indicates the SD-free alarm state, and 1 indicates the SD-with alarm state. The source node sends a CCM message with the flag bit set to 0, and the processing module sets the flag bit to 1 after an SD alarm event occurs. When the switching module compares the CCM message received this time with the CCM message received last time, if the flag bit is changed from 0 to 1, which indicates that an SD event occurs, the switching module switches the service from the primary path to the backup path. When the switching module compares the CCM message received this time with the CCM message received last time, if the flag bit is changed from 1 to 0, which indicates that the link has been recovered, the switching module switches the service from the standby path to the main path. If the mark bit is not changed, the last time is 0, the current time is still 0, which indicates that no SD event occurs, switching is not needed, and the service network is kept in the current main working path. If the flag bit is not changed, the previous time is 1, and the current time is still 1, which indicates that an SD event occurs and the link has not been recovered, switching is not needed, and the service is currently maintained in the standby working path.
Or when the setting module sets the marking bit, if the marking bit is empty, no mark is filled, and the SD-free alarm state is indicated; if a preset mark is filled in the mark bit, an SD alarm state is indicated. On this basis, when the switching module compares the CCM message received this time with the CCM message received last time, if the flag bit is found to have the set flag from null, indicating that an SD event occurs, the switching module switches the service from the primary path to the backup path. When the switching module compares the CCM message received this time with the CCM message received last time, if the flag bit is found to be empty from the set flag, indicating that the link has been recovered, the switching module switches the service from the standby path to the main path. If the mark bit is empty twice before and after, it shows that no SD event occurs, no switching is needed, and the service network is kept in the main working path at present. If the mark bit is found to have marks twice, the SD event is generated and the link is not recovered, switching is not needed, and the service is kept in the standby working path at present.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. A method for transmitting an in-band SD signal in a communication network, comprising:
setting a mark bit for representing the SD alarm state in the CCM message, and defaulting to be sent in a non-SD alarm state;
after receiving the CCM message, the intermediate node with the SD event sets an SD alarm state in the marker bit and forwards the SD alarm state according to a service path;
the host node compares the current CCM message with the last CCM message, and if the SD alarm state in the mark bit changes, the service path switching is executed.
2. The method for transmitting an inband SD signal in a communication network according to claim 1, characterized in that: the intermediate node detects the SD event through the port on the node, if the SD event occurs, a preset message filtering mechanism on the port is activated, a CCM message sent by the source node is intercepted, and an SD warning state is set in the mark bit.
3. The method for transmitting an inband SD signal in a communication network according to claim 1, characterized in that: in the flag bit, the non-SD alarm state and the SD alarm state are respectively represented by different flags.
4. The method for transmitting an inband SD signal in a communication network according to claim 1, characterized in that: the mark bit is empty when no SD alarm state exists, and a preset mark is filled when an SD alarm state exists.
5. The method for transmitting an inband SD signal in a communication network according to any of claims 1 to 4, characterized by: if the flag bit of the CCM message currently received by the host node is in the alarm state and the flag bit of the previous CCM message received by the host node is in the non-SD alarm state, the service is switched from the primary path to the backup path.
6. The method for transmitting an inband SD signal in a communication network according to any of claims 1 to 4, characterized by: if the flag bit of the CCM message currently received by the host node is in the no-alarm state and the flag bit of the previous CCM message received by the host node is in the SD alarm state, the service is switched back to the primary path from the standby path.
7. A system for transmitting an in-band SD signal in a communication network, comprising:
the setting module is used for setting a mark bit for representing the SD alarm state in the CCM message and defaulting to be the SD-free alarm state;
the judging module is used for judging whether the SD alarm event occurs in the middle node;
the processing module is used for intercepting the received CCM message after the SD alarm event occurs in the middle node, setting the flag bit to be in an SD alarm state and forwarding the flag bit according to the service path;
and the switching module is used for comparing the current CCM message with the last CCM message, and executing service path switching if the SD alarm state in the mark bit changes.
8. The system for transmitting an inband SD signal in a communication network according to claim 7, characterized in that: the processing module comprises a message filtering mechanism and a message editing mechanism which are arranged at the port of the node, wherein the message filtering mechanism intercepts a CCM message from a source node after an SD alarm event occurs; the message editing mechanism is used for editing the SD alarm state in the CCM message intercepted and captured.
9. The system for transmitting an in-band SD signal in a communication network according to claim 7 or 8, characterized in that: the SD-free alarm state and the SD alarm state are respectively represented in the mark bit by adopting different marks;
or the mark bit is empty when no SD alarm state exists, and is filled with a preset mark when the SD alarm state exists.
10. The system for transmitting an in-band SD signal in a communication network according to claim 7 or 8, characterized in that:
if the flag bit of the current CCM message received by the host node is in an alarm state and the flag bit of the last CCM message received by the host node is in an SD-free alarm state, switching the service from the main path to the standby path;
if the mark bit of the current CCM message received by the host node is in the state of no alarm and the mark bit of the last CCM message received by the host node is in the state of SD alarm, the service is switched from the standby path to the main path.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1525671A (en) * | 2003-02-27 | 2004-09-01 | �ձ�������ʽ���� | Alarm transfer method and wide area ethernet network |
| US6898177B1 (en) * | 1999-09-09 | 2005-05-24 | Nortel Networks Limited | ATM protection switching method and apparatus |
| CN104852809A (en) * | 2014-02-14 | 2015-08-19 | 中兴通讯股份有限公司 | Method and system for processing SD (signal degradation) fault |
| CN108632121A (en) * | 2017-03-23 | 2018-10-09 | 中兴通讯股份有限公司 | A kind of pretection switch method and device for looped network |
| CN108712207A (en) * | 2018-04-17 | 2018-10-26 | 烽火通信科技股份有限公司 | A kind of management method and system of link and business |
-
2019
- 2019-10-31 CN CN201911053144.2A patent/CN112751696B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6898177B1 (en) * | 1999-09-09 | 2005-05-24 | Nortel Networks Limited | ATM protection switching method and apparatus |
| CN1525671A (en) * | 2003-02-27 | 2004-09-01 | �ձ�������ʽ���� | Alarm transfer method and wide area ethernet network |
| CN104852809A (en) * | 2014-02-14 | 2015-08-19 | 中兴通讯股份有限公司 | Method and system for processing SD (signal degradation) fault |
| CN108632121A (en) * | 2017-03-23 | 2018-10-09 | 中兴通讯股份有限公司 | A kind of pretection switch method and device for looped network |
| CN108712207A (en) * | 2018-04-17 | 2018-10-26 | 烽火通信科技股份有限公司 | A kind of management method and system of link and business |
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