CN101145871B - 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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CN101145871B
CN101145871B CN2006101520441A CN200610152044A CN101145871B CN 101145871 B CN101145871 B CN 101145871B CN 2006101520441 A CN2006101520441 A CN 2006101520441A CN 200610152044 A CN200610152044 A CN 200610152044A CN 101145871 B CN101145871 B CN 101145871B
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alarm
timing
error
error code
adds
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CN101145871A (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 method that alarm produces the order mistake
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 and cause the mistake of alarming wrong generation order and causing to switch owing to error code appears in the reception signal, particularly a kind of error code realization reduction SD appears in signal and EXC alarms the method that produces the order mistake based on receiving in the SDH business.
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 based on specific overhead byte value, and determines whether to produce alarm and carry out corresponding switching operation based on 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.
Alarm embodies with SD is the detection threshold size cases of the error code in a period of time and user's setting in the SDH business for EXC alarm; 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; Like table 1, shown in 2.Alarm is all the error code Threshold Crossing Alert with SD for EXC alarm, 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.
Table 1 G.806 in to the regulation of maximum Error detection time of VC-4 and VC-3
Figure GDA0000053374310000011
Table 2 G.806 in to VC-2, the regulation of the maximum Error detection time of VC-12 and VC-11
Figure GDA0000053374310000021
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.Based on 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 possibly be 10,10 2, 10 3, 10 4, 10 5Perhaps 10 6), there is THR in the reception 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 the SD alarm of the out-of-limit back of error code in the SDH business, and alarm produces the problem of order mistake with EXC, 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 method that alarm produces the order mistake, comprising:
According to for out-of-limit detection threshold value, the maximum Error detection time that is provided with respectively with Signal Degrade of the error rate, carry out Threshold Crossing Alert;
It is characterized in that:
The timing sign is set, when error code occurs, starts timing, error code values simultaneously adds up.
The said 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 then in the maximum Error detection time.
The said 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 said 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 SD alarm and EXC alarm generation order mistake 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 1Maybe 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 possibly 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, have only error code to have occurred, 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 does, can be with reference to figure 4.
The first step: if current error code values that does not have Threshold Crossing Alert and a detection non-0 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 goes on foot to the 5th;
Second step:, empty EXC alarm error code accumulated value simultaneously, otherwise carried out for the 4th step if the EXC that adds up alarm error code values then produces the EXC alarm greater than threshold value;
The 3rd step:, empty SD alarm error code accumulated value simultaneously, otherwise carried out for the 4th step if the SD that adds up alarm error code values then produces the SD alarm greater than threshold value;
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/or 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 that does not have Threshold Crossing Alert and a detection non-0 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 goes on foot to the 5th;
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 (5)

1. in a SDH business signal errors is reduced the method that alarm produces the order mistake, comprising:
First detection threshold value and the first maximum Error detection time are set for the error rate is out-of-limit; For Signal Degrade is provided with second detection threshold value and the second maximum Error detection time, out-of-limit for the said error rate, any time of the said first maximum Error detection in the time that is being provided with; Error code values has surpassed said first detection threshold value if add up; Then produce Threshold Crossing Alert, for said Signal Degrade, any time of the said second maximum Error detection in the time that is being provided with; Error code values has surpassed said second detection threshold value if add up, and then produces Threshold Crossing Alert;
It is characterized in that:
The timing sign is set, when error code occurs, starts timing, error code values simultaneously adds up.
2. in the SDH business as claimed in claim 1 signal errors is reduced the method that alarm produces the order mistake, it is characterized in that:
If current error code values non-zero that does not have error rate Threshold Crossing Alert or Signal Degrade Threshold Crossing Alert and a detection or error code accumulated value are greater than zero; The alarm that then adds up produces timing, and the error code values of add up respectively error rate Threshold Crossing Alert or Signal Degrade Threshold Crossing Alert;
The error code values of the said error rate Threshold Crossing Alert that adds up greater than the error code values of said first detection threshold value or the said Signal Degrade Threshold Crossing Alert that adds up greater than said second detection threshold value; Then produce error rate Threshold Crossing Alert or Signal Degrade Threshold Crossing Alert, empty the error code accumulated value simultaneously; Otherwise the said first maximum Error detection time or the second maximum Error detection time then after, empty the error code values that adds up, empty the timing that the timing sign starts simultaneously, stop timing.
3. in the SDH business as claimed in claim 2 signal errors is reduced the method that alarm produces the order mistake, it is characterized in that:
If it is zero that the timing of error rate Threshold Crossing Alert or Signal Degrade Threshold Crossing Alert and timing sign startup takes place, the alarm disappearance timing that adds up, error code values simultaneously adds up; If the said first maximum Error detection time or the said second maximum Error detection time to and the error code values that adds up be lower than threshold value, then disappear and alarm.
4. in the SDH business as claimed in claim 3 signal errors is reduced the method that alarm produces the order mistake, it is characterized in that:
If the said first maximum Error detection time to and error rate Threshold Crossing Alert produce timing non-0 or the said second maximum Error detection time to and the Signal Degrade alarm to produce timing non-0, then empty the timing that the timing sign starts, stop timing.
5. in the SDH business as claimed in claim 1 signal errors is reduced the method that alarm produces the order mistake, it is characterized in that:
If the said first maximum Error detection time or the said second maximum Error detection time to and the error code values that adds up be lower than detection threshold value, then disappear and 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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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
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
CN110011819B (en) * 2018-01-04 2022-04-19 中兴通讯股份有限公司 Method, device, equipment and system for generating SD (secure digital) alarm information

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Patent Citations (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

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