CN101145871A - Method for reducing erroneous alarm generation sequence in SDH service - Google Patents

Method for reducing erroneous alarm generation sequence in SDH service Download PDF

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Publication number
CN101145871A
CN101145871A CNA2006101520441A CN200610152044A CN101145871A CN 101145871 A CN101145871 A CN 101145871A CN A2006101520441 A CNA2006101520441 A CN A2006101520441A CN 200610152044 A CN200610152044 A CN 200610152044A CN 101145871 A CN101145871 A CN 101145871A
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alarm
timing
error code
error
exc
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CN101145871B (en
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干建
罗亚军
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ZTE Corp
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ZTE Corp
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Abstract

The invention relates an optical synchronization digital transmission technique, specifically relates to a warning mistake generation sequence and an error switch caused by the occurrence of bit error in a received signal in optical synchronization digital transmission equipment, in particular to a method for realizing SD reduction and EXC warning mistake generation sequences based on the occurrence of the bit error in the received signal in SDH services. According to the detection threshold and the maximum bit error detection time set for the off-limit of the bit error rate and the signal deterioration respectively, the off-limit warning is made, and by setting a timing label, the timing is started and the bit error values are accumulated at the same time when the bit error occurs. The invention has been tested on the equipment in many times, compared with the prior art, is able to obviously reduce SD warning and EXC warning mistake generation sequences, reduces the service SD and SF error switch events caused by the problem, and thereby reducing the generation rate of SD and SF error switches of the SDH network.

Description

In the SDH business signal errors is reduced the wrong method that produces order of alarm
Technical field
The present invention relates to Optical synchronization digital transmission technology (SDH), particularly, relate in a kind of Optical synchronization digital transmission (SDH) equipment because received signal occurs that error code causes the wrong generation order of alarm and the mistake that causes is switched, particularly a kind ofly in the SDH business, error code occurs and realize reducing SD and the wrong method that produces order of EXC alarm based on received signal.
Background technology
In order to ensure the stability of the professional drive access of SDH, network element device need detect the current signal that receives in real time according to specific overhead byte value, and determines whether to produce alarm and carry out corresponding switching operation according to the error code size in the signal.
According to the ITU standard recommendation,, the error rate out-of-limit (EXC) alarm switches if will triggering SF; If will triggering SD, Signal Degrade (SD) alarm switches; If occur EXC alarm and SD alarm simultaneously, because the priority of EXC alarm is higher than the SD alarm, so, will cause that SF switches according to the processed principle.
EXC alarm and SD alarm embody is the detection threshold size cases of the error code in a period of time and user's setting in the SDH business, and the height of thresholding being set according to the user, error code time of adding up is also inequality, specifically can be with reference to the ITU standard recommendation, as table 1, shown in 2.EXC alarm and SD alarm are all the error code Threshold Crossing Alert, and what both differences were the user is provided with the threshold value difference, and the EXC alarming threshold is usually above the SD alarming threshold, thus when EXC occurring and alarming in the signal error condition more serious.Among table 1 G806 to the regulation of maximum Error detection time of VC-4 and VC-3
Detector threshold Actual BER
≥10 -3 10 -4 10 -5 10 -6 10 -7 10 -8 10 -9
10 -3 10 -4 10 -5 10 -6 10 -7 10 -8 10 -9 10ms 10ms 10ms 10ms 10ms 10ms 10ms 100ms 100ms 100ms 100ms 100ms 100ms 1s 1s 1s 1s 1s 10s 10s 10s 10s 100s 100s 100s 1000s 1000s 10000s
Table 2 G.806 in to VC-2, the regulation of the maximum Error detection time of VC-12 and VC-11
Detector threshold Actual BER
≥10 -3 10 -4 10 -5 10 -6 10 -7 10 -8
10 -3 10 -4 10 -5 10 -6 10 -7 10 -8 40 ms 40ms 40ms 40ms 40ms 40ms 400ms 400ms 400ms 400ms 400ms 4s 4s 4s 4s 40s 40s 40s 400s 400s 4000s
With 10 -7Detection threshold be example, specify the generation and the disappearance method of EXC alarm and SD alarm in conjunction with the ITU standard recommendation: if the detection threshold of user's setting is 10 -7, the so maximum Error detection time is 100 seconds, i.e. any time in 100 seconds is if the number of bit errors that adds up has surpassed 10 -7Error code threshold T hr, will produce Threshold Crossing Alert, if still be lower than threshold T hr to the error code values that adds up 100 second finish time, will be clear 0 the error code values that adds up, restart error code and add up and judge.If produced Threshold Crossing Alert, so 100 second finish time, if the error code values that adds up is lower than 10 -7Error code threshold T hr, Threshold Crossing Alert will disappear so.According to the relation of maximum Error detection time and detection threshold in the table, can infer that the error code threshold T hr size of different detection threshold is unequal.
If the detection threshold of SD that the user is provided with in actual treatment and EXC alarm is respectively THR 1And THR 2(THR 1=n*THR 2, n may be 10,10 2, 10 3, 10 4, 10 5Perhaps 10 6), there is THR in the received signal 1The error code of thresholding (this moment equipment should produce EXC alarm) often produces the SD alarm earlier on the webmaster, the back produces the EXC alarm, simultaneously formerly should trigger equipment that SF switches and has but triggered SD and switch, and has caused professional mistake to switch.
Summary of the invention
The object of the invention is to solve SD alarm of the out-of-limit back of error code in the SDH business and the wrong problem that produces order of EXC alarm, thereby reduces because the professional SD that this problem causes the generation that the SF mistake is switched, the self-healing property of the raising SDH network operation.
The present invention specifically is achieved in that
In a kind of SDH business signal errors is reduced the wrong method that produces order of alarm, comprising:
According to detection threshold value, maximum Error detection time out-of-limit for the error rate and that Signal Degrade is provided with respectively, carry out Threshold Crossing Alert;
It is characterized in that:
The timing sign is set, starts timing when error code occurs, error code values simultaneously adds up.
The described error code values that adds up produces Threshold Crossing Alert greater than detection threshold value, empties the error code accumulated value simultaneously; Otherwise stop timing.
The described maximum Error detection time arrives, and empties the error code accumulated value, empties the timing that the timing sign starts simultaneously, stops timing.
The timing that the startup of Threshold Crossing Alert and timing sign takes place is zero, and the timing sign starts timing after Threshold Crossing Alert disappears, and error code values simultaneously adds up.
The timing non-zero that Threshold Crossing Alert and timing sign start takes place, and the described maximum Error detection time arrives, and then empties the timing that the timing sign starts, and stops timing.
If the maximum Error detection time of alarm to and the error code values that adds up be lower than detection threshold value, then disappear to alarm, stop timing.
Adopt the present invention on equipment, to carry out repeatedly test, compare, can obviously reduce the wrong order that produces of SD alarm and EXC alarm with existing method, reduce because the professional SD that this problem causes, the SF mistake is switched incident, thereby reduces SDH network SD, the probability of happening that the SF mistake is switched.
Description of drawings
Fig. 1 produces coordinate diagram for existing scheme EXC alarm;
Fig. 2 produces coordinate diagram for existing scheme SD alarm;
Fig. 3 is SD of the present invention, and the EXC alarm produces coordinate diagram;
Fig. 4 is alarm generation of the present invention and disappearance flow chart.
Embodiment
With the existing scheme of coordinate diagram explanation and SD of the present invention alarm and EXC alarming processing procedure declaration, with reference to figure 1,2,3.Transverse axis t is the time among the figure, and longitudinal axis err count is the error code accumulated value.The detection threshold of supposing EXC alarm and SD alarm is respectively THR 1And THR 2(THR 1=10*THR 2), the maximum Error detection time of EXC alarm is T, and then the maximum Error detection time of SD alarm is 10T, and it is t that actual error code produces constantly 1, t 1May be in any time between 0 to T.
Existing scheme EXC, the SD alarming processing is with reference to figure 1,2.At detection threshold THR 1The maximum Error detection time the T of end constantly because the accumulated value of error code may still be lower than error code threshold T hr, thus will be clear 0 the error code values that adds up, restart error code and add up and judge, until t 3The error code accumulated value is higher than the error code threshold value constantly, will produce the EXC alarm this moment.Because it is 10T that SD alarms the maximum Error detection time, so arrive T constantly, error code adds up continuing, and arrives t 2Constantly, the error code accumulated value surpasses threshold T hr, produces the SD alarm, and the SD alarm produces prior to the EXC alarm like this.
Fig. 3 is a processing procedure of the present invention, and to alarm the finish time of maximum Error detection time be t to EXC in the present invention 1+ T is t and SD alarms the finish time of maximum Error detection time 1+ 10*T, thus T arrived constantly, even the error code values that adds up is lower than the operation that empties that error code threshold T hr does not make error code yet, until t 2Constantly, the error code accumulated value of EXC alarm and SD alarm surpasses threshold T hr simultaneously, produces SD and EXC alarm simultaneously.Greatest improvement point of the present invention just is to have added timing and starts sign, has only occurred error code, the statistics that just picks up counting, in the corresponding diagram 3 from t 1Operations such as error code values constantly pick up counting and add up.Idiographic flow of the present invention is, can be with reference to figure 4.
The first step: if current error code values non-0 that does not have Threshold Crossing Alert and a detection or error code accumulated value then start timer greater than 0, the alarm that adds up produces timing, and add up respectively SD and EXC alarm error code values, otherwise to the 5th step;
Second step:, empty EXC alarm error code accumulated value simultaneously if the EXC that adds up alarm error code values then produces the EXC alarm greater than threshold value.Otherwise to the 8th step;
The 3rd step:, empty SD alarm error code accumulated value simultaneously if the SD that adds up alarm error code values then produces the SD alarm greater than threshold value.Otherwise to the 8th step;
The 4th step: if the maximum Error detection time of alarm arrives, then empty the error code accumulated value, empty alarm simultaneously and produce timing; To the 8th step.
The 5th step: if produced SD and EXC alarm and alarm generation timing is 0, the alarm disappearance timing that then adds up, and error code values simultaneously adds up; Otherwise to the 7th step;
The 6th step: if the maximum Error detection time of alarm to and the error code values that adds up be lower than threshold value, the alarm that then disappears goes on foot to the 8th;
The 7th step: if the maximum Error detection time of alarm to and alarm to produce timing non-0, then empty alarm and produce timing.
The 8th step: close down timer.
With 10 -6With 10 -7Detection threshold be that (wherein the detection threshold of EXC alarm is 10 to example -5, the detection threshold of SD alarm is 10 -7), in conjunction with the handling process of this paper generation and the disappearance method that EXC alarm and SD alarm is described:
The first step: if current error code values non-0 that does not have Threshold Crossing Alert and a detection or error code accumulated value then start timer greater than 0, the alarm that adds up produces timing, and add up respectively SD and EXC alarm error code values, otherwise to the 5th step;
Second step:, empty EXC alarm error code accumulated value simultaneously if the EXC that adds up alarm error code values then produces the EXC alarm greater than threshold value.Otherwise to the 8th step;
The 3rd step:, empty SD alarm error code accumulated value simultaneously if the SD that adds up alarm error code values then produces the SD alarm greater than threshold value.Otherwise to the 8th step;
The 4th step: if alarm produced timing by 10 seconds, then empty the error code accumulated value of EXC alarm, empty alarm simultaneously and produce timing; If alarm produced timing by 100 seconds, then empty the error code accumulated value of SD alarm, empty alarm simultaneously and produce timing; To the 8th step.
The 5th step: if produced SD and EXC alarm and alarm generation timing is 0, the alarm disappearance timing that then adds up, and error code values simultaneously adds up; Otherwise to the 7th step;
The 6th step: if alarm disappearance timing to 10 seconds and the EXC alarm error code values that adds up be lower than threshold value, the EXC that then disappears alarm, if alarm disappearance timing to 100 seconds and the SD alarm error code values that adds up be lower than threshold value, the SD that then disappears alarm is to the 8th step;
The 7th step: if arrived in 10 seconds, and alarm to produce timing non-0, then empty alarm and produce timing; If 100 seconds to and alarm to produce timing non-0, then empty alarm and produce timing.
The 8th step: close down timer.

Claims (6)

1. in a SDH business signal errors is reduced the wrong method that produces order of alarm, comprising:
According to detection threshold value, maximum Error detection time out-of-limit for the error rate and that Signal Degrade is provided with respectively, carry out Threshold Crossing Alert;
It is characterized in that:
The timing sign is set, starts timing when error code occurs, error code values simultaneously adds up.
2. in the SDH business as claimed in claim 1 signal errors is reduced the wrong method that produces order of alarm, it is characterized in that:
The described error code values that adds up produces Threshold Crossing Alert greater than detection threshold value, empties the error code accumulated value simultaneously; Otherwise stop timing.
3. in the SDH business as claimed in claim 1 signal errors is reduced the wrong method that produces order of alarm, it is characterized in that:
The described maximum Error detection time arrives, and empties the error code accumulated value, empties the timing that the timing sign starts simultaneously, stops timing.
4. in the SDH business as claimed in claim 1 signal errors is reduced the wrong method that produces order of alarm, it is characterized in that:
The timing that the startup of Threshold Crossing Alert and timing sign takes place is zero, and the timing sign starts timing after Threshold Crossing Alert disappears, and error code values simultaneously adds up.
5. in the SDH business as claimed in claim 1 signal errors is reduced the wrong method that produces order of alarm, it is characterized in that:
The timing non-zero that Threshold Crossing Alert and timing sign start takes place, and the described maximum Error detection time arrives, and then empties the timing that the timing sign starts, and stops timing.
6. as in claim 1 or the 4 or 5 described SDH business signal errors being reduced the wrong method that produces order of alarm, it is characterized in that:
If the maximum Error detection time of alarm to and the error code values that adds up be lower than detection threshold value, then disappear to alarm, stop timing.
CN2006101520441A 2006-09-12 2006-09-12 Method for reducing erroneous alarm generation sequence in SDH service Expired - Fee Related CN101145871B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101404542B (en) * 2008-10-14 2011-05-04 烽火通信科技股份有限公司 Method for eliminating random PPI-AIS alarm at circuit self-loop of 2M interface in SDH equipment
CN102215127A (en) * 2011-06-08 2011-10-12 中兴通讯股份有限公司 Signal degrade processing method, device and node equipment
CN101741518B (en) * 2010-02-09 2012-12-19 华为技术有限公司 Link circuit processing method and device
CN105281931A (en) * 2014-06-18 2016-01-27 中兴通讯股份有限公司 Error code detection method, device and system of POTN
CN110011819A (en) * 2018-01-04 2019-07-12 中兴通讯股份有限公司 Generate method, apparatus, equipment and the system of SD warning information

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5606563A (en) * 1995-05-18 1997-02-25 Pmc-Sierra, Inc. Programmable jump window for sonet compliant bit error monitoring

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101404542B (en) * 2008-10-14 2011-05-04 烽火通信科技股份有限公司 Method for eliminating random PPI-AIS alarm at circuit self-loop of 2M interface in SDH equipment
CN101741518B (en) * 2010-02-09 2012-12-19 华为技术有限公司 Link circuit processing method and device
CN102215127A (en) * 2011-06-08 2011-10-12 中兴通讯股份有限公司 Signal degrade processing method, device and node equipment
WO2012167667A1 (en) * 2011-06-08 2012-12-13 中兴通讯股份有限公司 Signal degradation processing method, device and node device
CN105281931A (en) * 2014-06-18 2016-01-27 中兴通讯股份有限公司 Error code detection method, device and system of POTN
CN105281931B (en) * 2014-06-18 2019-11-29 南京中兴新软件有限责任公司 Bit error detection method, the apparatus and system of POTN
CN110011819A (en) * 2018-01-04 2019-07-12 中兴通讯股份有限公司 Generate method, apparatus, equipment and the system of SD warning information

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