CN105099832B - A kind of method and system for detecting link signal deterioration state - Google Patents
A kind of method and system for detecting link signal deterioration state Download PDFInfo
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Abstract
The invention discloses a kind of method and system for detecting link signal deterioration state, this method includes：Ensure that link is alerted without related port, open VS layers of CV frames and enable；CV frame counts statistics is performed, when execution number reaches theoretical execution number, record CV frame counts and and actual execution time；When CV frame counts and be less than theory CV frame counts with the ratio of actual execution time and perform the time with theoretical ratio when, judge link signal deterioration, trigger signal deterioration alarm is abandoned via the VP layer CV frames for alerting port；Otherwise, it is determined that Signal Degrade is not present in link, recover VP layers of CV frames transmission.The present invention, ratio size by comparing CV frame counts and with the ratio of actual execution time and theory CV frame counts and with the theoretical execution time, judge that link whether there is Signal Degrade, and improve statistical accuracy by improving CV frame transmission speeds, the adjustment of theory CV frame count sums is carried out according to physical link quality so that the judging result of link signal deterioration is more accurate.
Description
Technical field
The present invention relates to optical-fiber network technical fields, and in particular to it is a kind of detect link signal deterioration state method and be
System.
Background technology
CC (Continuity check and Connectivity Verification, continuity detection and connectedness
Verification) function operation is in aggressive mode, source MEP (MEG End Point, MEG endpoint) periodicity sending OAM (Operation
Administration and Maintenance, Operations, Administration and Maintenance) message, egress MEP detections two are safeguarded between endpoint
Loss of continuity (LOC, loss of continuity) failure and merge, connect by mistake etc. by mistake failure of connectivity.
The frame for transmitting CC information is CV frames, as a kind of OAM of initiative, available for fault management, performance monitoring and guarantor
Protective switching detects the company between any pair of MEP in identical MEG (Maintenance Entity Group, management entity group) domain
Continuous property loses failure, can also detect between two MEG undesirable connective (mistake is mixed into), in MEG with one not
It is required that MEP (unexpected MEP) between failure of connectivity and other fault conditions it is (such as unexpected MEG grades, non-
Desired cycle etc.).The sending cycle of CV frames is 3.3ms/10ms/100ms/1s, and MEP carries out failure to the CV frames of reception and sentences
It is disconnected, if not receiving the correct CV frames of opposite end MEP in 3.5 times of sending cycles, LOC alarms are generated, and to receiving not
Matched CC message must report.For transmission link Signal Degrade failure common in optical-fiber network, due to the OAM message of transmission
It is partially discarded, most of CV frames for detection of connectivity and Connectivity Verification still can be received by the equipment at both ends, be caused
Fail generate LOC alarm, can not trigger protection switch, make business via the link transmission of deterioration, cause to damage.
To solve the above-mentioned problems, scheme proposes to count CV frames using the execution cycle and number of CV frame counts statistics
Quantity, and the mode compared with theoretical count value judges transmission link with the presence or absence of Signal Degrade, still, CV frame counts statistics is appointed
Be engaged in the polling mechanism based on device software operation, execution time of statistics task can be subject to miscellaneous equipment running software situation etc. because
The interference of element and extend, so as to cause CV number of frames statistics excessive, the judging result of transmission link Signal Degrade is not accurate enough
Really.
The content of the invention
The technical problems to be solved by the invention are to solve the prior art according to the execution cycle of statistics task and number to come
CV number of frames is counted, and the mode compared with theoretical count value judges transmission link with the presence or absence of Signal Degrade, since statistics is appointed
The execution time of business can be interfered and extend, and cause CV frame counts statistics excessive, the judging result of transmission link Signal Degrade
The problem of not accurate enough.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is to provide a kind of detection link signal deterioration
The method of state, comprises the following steps：
On the premise of ensuring that link is alerted without related port, open VS layers of CV frames and enable；
Perform CV frame count statistics tasks, when perform number reach it is theoretical perform number when, record CV frame counts and and
Actual execution time；
Judge CV frame counts and whether be less than theory CV frame counts with the ratio of actual execution time and during with theoretical execution
Between ratio, if being less than, judge link presence signal deteriorate, trigger signal deterioration alarm, establish abandoning stream, abandon via announcement
The VP layer CV frames of alert port；Otherwise, it is determined that Signal Degrade is not present in link, Signal Degrade alarm clearance deletes abandoning stream, recovers
VP layers of CV frames transmission.
In the above-mentioned technical solutions, after the link presence signal deterioration is judged, by the transmission of the VS layers of CV frame
Speed is increased to 10 times or 10 times or more, performs CV frame count statistics tasks again, and to the theory CV frame counts and progress
Synchronous change.
In the above-mentioned technical solutions, according to the actual conditions of the link, to the theory CV frame counts and carry out corresponding
Adjustment, more accurately to judge the Signal Degrade state of the link.
In the above-mentioned technical solutions, after triggering the Signal Degrade alarm, keep the connection of the link and continue to execute
The CV frame counts statistics task.
The present invention also provides it is a kind of detect link signal deterioration state system, including：
Enabling unit on the premise of ensuring that link is alerted without related port, is opened VS layers of CV frames and is enabled；
Statistic unit performs CV frame count statistics tasks, when execution number reaches theoretical execution number, records CV frame meters
Number and and actual execution time；
Signal Degrade judging unit judges CV frame counts and whether is less than theory CV frame meters with the ratio of actual execution time
Number and the ratio with the theoretical execution time if being less than, judge that link presence signal deteriorates, and trigger signal deterioration alarm is established
Abandoning stream abandons the VP layer CV frames via alarm port；Otherwise, it is determined that Signal Degrade is not present in link, Signal Degrade alarm is clear
It removes, deletes abandoning stream, recover VP layers of CV frames transmission.
In the above-mentioned technical solutions, Signal Degrade judging unit is after the link presence signal deterioration is judged, by institute
The transmission speed for stating VS layers of CV frames is increased to 10 times or 10 times or more, performs CV frame count statistics tasks again, and to the reason
By CV frame counts and synchronize change.
In the above-mentioned technical solutions, adjustment unit is further included, according to the actual conditions of the link, to the theory CV frames
It counts and is adjusted correspondingly.
In the above-mentioned technical solutions, after Signal Degrade judging unit trigger signal deterioration alarm, the connection of link, system are kept
Meter unit continues to execute the CV frame counts statistics task.
The present invention, by comparing CV frame counts and with the ratio of actual execution time and theory CV frame counts and with theory
The ratio size of time is performed, judges that link whether there is Signal Degrade, when link signal deteriorates, trigger signal deterioration alarm,
And pass through and establish abandoning stream, the VP layer CV frames via alarm port are abandoned, trigger protection is switched, after Signal Degrade alarm disappears,
Recover VP layers of CV frames transmission, and statistical accuracy is improved by improving CV frame transmission speeds, carried out according to physical link quality
The adjustment of theoretical CV frame counts sum so that the judging result of link signal deterioration is more accurate.
Description of the drawings
Fig. 1 is a kind of method flow diagram for detecting link signal deterioration state provided in an embodiment of the present invention；
Fig. 2 is a kind of system schematic for detecting link signal deterioration state provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in detail with reference to specification drawings and specific embodiments.
An embodiment of the present invention provides a kind of methods for detecting link signal deterioration state, are counted by performing CV frame counts
Task performs number and reaches theoretical when performing number, record CV frame counts and and actual execution time, judge CV frame counts and
Whether it is less than theory CV frame counts with the ratio of actual execution time and the ratio of time is performed with theory, if being less than, judges
Link presence signal deteriorates, and abandoning stream is established in trigger signal deterioration alarm, and then by abandoning the VP via the alarm port
The mode of (Virtual, Path, Virtual Channel) layer CV frames triggers the pretection switch via the link, and disappears in Signal Degrade alarm
After mistake, abandoning stream is deleted, recovers the transmission of CP layers of CV frames, as shown in Figure 1, the described method comprises the following steps：
Step 101, definite link without RLOS (Receive Loss of Signal, receiving side dropout),
On the premise of the related ports such as LINKLOS (connection dropout) or VSLOC alert, VS (Virtual Section, void are opened
Section) layer CV frames enable, and middle port is NNI (Network-Node Interface).
Step 102 performs CV frame count statistics tasks, judges to perform whether number reaches theoretical execution number, if so,
Go to step 103；Otherwise, 102 are gone to step.
It should be noted that the theoretical number that performs is obtained according to the theoretical execution computation of Period for performing time and statistics task
It arrives, such as：The execution cycle of statistics task is 5ms, and theory performs the time as 20s, then the theoretical number that performs is 4000 times.
Step 103 removes execution number, and records CV frame counts and and actual execution time.
Step 104, judge CV frame counts and with the ratio of actual execution time whether be less than theory CV frame counts and with reason
By the ratio for performing the time, if being less than, 105 are gone to step；Otherwise, 106 are gone to step.
It should be noted that since the execution cycle of statistics task is 5ms, theory performs time=execution cycle × theory
Number is performed, such as the theoretical number that performs is 4000 times, then it is theoretical to perform time=5ms × 4000=20000ms=20s；By
It is 3.3ms/10ms/100ms/1s in the sending cycle of CV frames, most fast sending cycle is 3.3ms, i.e., sends 300 frame (CV within 1 second
Frame transmission speed), then theory CV frame counts and=theory perform time × CV frame transmission speeds, i.e. theory CV frame counts and=20
The frame of second × 300 frames/second=6000.
Further, after transmission link Signal Degrade is judged, in order to improve statistical accuracy, chain is determined whether
Caused by whether road Signal Degrade is other unexpected factors, the transmission speed of CV frames is increased to 10 times or 10 times or more, again
CV frame count statistics tasks are performed, and to theoretical CV frame counts and synchronize change.
Optionally, since the tolerances of different link pair Signal Degrades are different, CV frames in a period of time can also be stored
Several minimum values of sum are counted, and can be inquired about in network management interface, to check link actual conditions during practical application, according to CV
The situation of change of frame count sum is to theoretical CV frame counts and is adjusted correspondingly, so as to more accurately to the Signal Degrade of link
State is judged.
Step 105 judges that link presence signal deteriorates, and CV frame counts and and reality are removed in trigger signal deterioration alarm
The time is performed, establishes abandoning stream, abandons the VP layer CV frames via alarm port.
Step 106 judges link there is no Signal Degrade, Signal Degrade alarm clearance, removes CV frame counts and and real
Border performs the time, deletes abandoning stream, recovers the transmission of VP layers of CV frames.
It should be noted that after Signal Degrade alarm generates, the port to link and optical module do not carry out shutoff operation, protect
The connection of link is held, to continue the counting statistics task of VS layers of CV frames and the Signal Degrade state of link to be sentenced
It is disconnected.Meanwhile abandoning stream is established, it is necessary to be directed to alarm port for VP layers of relevant linear/looped network protection of triggering, it abandons via the announcement
The VP layer CV frames of alert port, trigger protection are switched, and after Signal Degrade alarm disappears, delete abandoning stream, recover VP layers of CV frames
Transmission.
The embodiment of the present invention additionally provides a kind of system for detecting link signal deterioration state, as shown in Fig. 2, including：
Enabling unit 10 on the premise of ensuring that link is alerted without related port, is opened VS layers of CV frames and is enabled；
Statistic unit 20 performs CV frame count statistics tasks, when execution number reaches theoretical execution number, records CV frames
Counting and and actual execution time；
Signal Degrade judging unit 30 judges CV frame counts and whether is less than theory CV frames with the ratio of actual execution time
The ratio of time is counted and performed with theory, if being less than, judges that link presence signal deteriorates, trigger signal deterioration alarm is built
Vertical abandoning stream, abandons the VP layer CV frames via alarm port；Otherwise, it is determined that Signal Degrade, Signal Degrade alarm is not present in link
It removes, deletes abandoning stream, recover VP layers of CV frames transmission.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn that the knots made under the enlightenment of the present invention
Structure changes, and the technical schemes that are same or similar to the present invention are each fallen within protection scope of the present invention.
Claims (8)
- A kind of 1. method for detecting link signal deterioration state, which is characterized in that comprise the following steps：On the premise of ensuring that link is alerted without related port, open VS layers of CV frames and enable；CV frame count statistics tasks are performed, when execution number reaches theoretical execution number, record CV frame counts and and reality Perform the time；Judge CV frame counts and whether be less than theory CV frame counts with the ratio of actual execution time and perform the time with theory Ratio if being less than, judges that link presence signal deteriorates, and trigger signal deterioration alarm is established abandoning stream, abandoned via alarm end The VP layer CV frames of mouth；Otherwise, it is determined that Signal Degrade is not present in link, Signal Degrade alarm clearance deletes abandoning stream, recovers VP layers CV frames transmit；Wherein, theoretical CV frame counts and=theory perform time × CV frame transmission speeds；VS layers are Virtual Section, empty Section layer；VP layers of Virtual Path, Virtual Channel layer.
- 2. the method as described in claim 1, which is characterized in that after the link presence signal deterioration is judged, by described in The transmission speed of VS layers of CV frames is increased to 10 times or 10 times or more, performs CV frame count statistics tasks again, and to the theory CV frame counts and synchronize change.
- 3. the method as described in claim 1, which is characterized in that according to the actual conditions of the link, to the theory CV frames It counts and is adjusted correspondingly, more accurately to judge the Signal Degrade state of the link.
- 4. the method as described in claim 1, which is characterized in that after triggering the Signal Degrade alarm, keep the link It connects and continues to execute the CV frame counts statistics task.
- 5. a kind of system for detecting link signal deterioration state, which is characterized in that including：Enabling unit on the premise of ensuring that link is alerted without related port, is opened VS layers of CV frames and is enabled；Statistic unit performs CV frame count statistics tasks, when perform number reach it is theoretical perform number when, record CV frame counts and And actual execution time；Signal Degrade judging unit, judge CV frame counts and with the ratio of actual execution time whether be less than theory CV frame counts and With the theoretical ratio for performing the time, if being less than, judge that link presence signal deteriorates, trigger signal deterioration alarm is established and abandoned Stream abandons the VP layer CV frames via alarm port；Otherwise, it is determined that Signal Degrade is not present in link, Signal Degrade alarm clearance is deleted Except abandoning stream, recover VP layers of CV frames transmission；Wherein, theoretical CV frame counts and=theory perform time × CV frame transmission speeds；VS layers are Virtual Section, empty Section layer；VP layers of Virtual Path, Virtual Channel layer.
- 6. system as claimed in claim 5, which is characterized in that Signal Degrade judging unit is judging the link in the presence of letter After number deterioration, the transmission speed of the VS layer CV frame is increased to 10 times or 10 times or more, performs CV frame counts statistics times again Business, and to the theory CV frame counts and synchronize change.
- 7. system as claimed in claim 5, which is characterized in that adjustment unit is further included, according to the actual conditions of the link, To the theory CV frame counts and it is adjusted correspondingly.
- 8. system as claimed in claim 5, which is characterized in that after the deterioration alarm of Signal Degrade judging unit trigger signal, protect The connection of link is held, statistic unit continues to execute the CV frame counts statistics task.
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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 |
| CN102386997A (en) * | 2010-08-30 | 2012-03-21 | 中兴通讯股份有限公司 | Method and system for detecting signal degradation state of grouping paths |
| CN102724086A (en) * | 2012-06-21 | 2012-10-10 | 中兴通讯股份有限公司 | Method and device for detecting quality of transmission link |
| CN102790702A (en) * | 2011-05-19 | 2012-11-21 | 中兴通讯股份有限公司 | Method, device and system for detecting signal degradation of packet path |
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| US8472325B2 (en) * | 2007-05-10 | 2013-06-25 | Futurewei Technologies, Inc. | Network availability enhancement technique for packet transport networks |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102386997A (en) * | 2010-08-30 | 2012-03-21 | 中兴通讯股份有限公司 | Method and system for detecting signal degradation state of grouping paths |
| CN102790702A (en) * | 2011-05-19 | 2012-11-21 | 中兴通讯股份有限公司 | Method, device and system for detecting signal degradation of packet path |
| CN102724086A (en) * | 2012-06-21 | 2012-10-10 | 中兴通讯股份有限公司 | Method and device for detecting quality of transmission link |
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