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Numéro de publicationCN101145871 B
Type de publicationOctroi
Numéro de demandeCN 200610152044
Date de publication6 juin 2012
Date de dépôt12 sept. 2006
Date de priorité12 sept. 2006
Autre référence de publicationCN101145871A
Numéro de publication200610152044.1, CN 101145871 B, CN 101145871B, CN 200610152044, CN-B-101145871, CN101145871 B, CN101145871B, CN200610152044, CN200610152044.1
Inventeurs干建, 罗亚军
Déposant中兴通讯股份有限公司
Exporter la citationBiBTeX, EndNote, RefMan
Liens externes:  SIPO, Espacenet
Method for reducing erroneous alarm generation sequence in SDH service
CN 101145871 B
Résumé
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 SFerror switch events caused by the problem, and thereby reducing the generation rate of SD and SF error switches of the SDH network.
Revendications(5)  Langue du texte original : Chinois
1. 一种SDH业务中对信号误码降低告警产生次序错误的方法,包括:为误码率越限设置第一检测门限值、和第一最大误码检测时间,为信号劣化设置第二检测门限值、和第二最大误码检测时间,对于所述误码率越限,在设置的所述第一最大误码检测时间内的任意时刻,如果累加误码值超过了所述第一检测门限值,则产生越限告警,对于所述信号劣化,在设置的所述第二最大误码检测时间内的任意时刻,如果累加误码值超过了所述第二检测门限值,则产生越限告警;其特征在于:设置计时标志,在误码出现时启动计时,同时累加误码值。 An SDH traffic signal errors in order to reduce error alarm is generated, comprising: providing a first detection-limit threshold, and the first time the maximum error detection error rate for providing a second signal degradation detection threshold, and the second maximum error detection time, the error rate for the more limited, at any time in the first maximum error detection time setting, if the accumulated error exceeds said first value a detection threshold limit alarm is generated for the signal degradation, the maximum in the second set at any time within the error detection time, if the accumulated error detection value exceeds the second threshold value , limit alarm is generated; characterized by: setting the watch flag, start the timer when errors occur, while cumulative error value.
2.如权利要求1所述的SDH业务中对信号误码降低告警产生次序错误的方法,其特征在于:如果当前没有误码率越限告警或者信号劣化越限告警而且检测的误码值非零或者误码累加值大于零,则累加告警产生计时,并且分别累加误码率越限告警或者信号劣化越限告警的误码值;累加的所述误码率越限告警的误码值大于所述第一检测门限值或者累加的所述信号劣化越限告警的误码值大于所述第二检测门限值,则产生误码率越限告警或者信号劣化越限告警,同时清空误码累加值;否则在所述第一最大误码检测时间或者第二最大误码检测时间到时后,清空累加的误码值,同时清空计时标志启动的计时,停止计时。 2. SDH traffic signal according to the error in order to reduce false alarms generated method claims, characterized in that: If there is no error rate limit alarm limit alarm or signal degradation and errors detected value of non- zero or error accumulated value is greater than zero, the alarm is generated cumulative time, and are cumulative error rate limit alarm or signal degradation alarm over limit error value; the cumulative error rate-limit error value is greater than the alarm the first detection threshold or the accumulated error signal degradation over limit value is greater than the second detection alarm threshold, then a bit error rate limit alarm limit alarm or signal degradation, while empty error code accumulated value; otherwise, the maximum error is detected in the first time or the second largest after the error detection time to empty the accumulated error value, while emptying time stamp start time, stop the clock.
3.如权利要求2所述的SDH业务中对信号误码降低告警产生次序错误的方法,其特征在于:如果发生误码率越限告警或者信号劣化越限告警并且计时标志启动的计时为零,累加告警消失计时,同时累加误码值;如果所述第一最大误码检测时间或者所述第二最大误码检测时间到且累加的误码值低于门限值,则消失告警。 3. SDH business 2, wherein the error signal in order to reduce false alarms generated method claims, characterized in that: if the error rate of occurrence limit alarm limit alarm or signal degradation and timing mark start timing zero , cumulative timing alarm disappears, while the accumulated error value; if the first maximum error detection time or detection time of the second maximum error and the accumulated error value is below the threshold, the alarm disappears.
4.如权利要求3所述的SDH业务中对信号误码降低告警产生次序错误的方法,其特征在于:如果所述第一最大误码检测时间到且误码率越限告警产生计时非0或者所述第二最大误码检测时间到且信号劣化告警产生计时非0,则清空计时标志启动的计时,停止计时。 The SDH business 3 reduce errors in the signal sequence error alarm generation method according to claim, characterized in that: if the first time to the maximum error detection and error rate limit alarm generation timings nonzero or the second time to the maximum error detection and signal degradation alarm generation timing is nonzero, then empty the timing mark start time, stop the clock.
5.如权利要求1所述的SDH业务中对信号误码降低告警产生次序错误的方法,其特征在于:如果所述第一最大误码检测时间或者所述第二最大误码检测时间到且累加误码值低于检测门限值,则消失告警,停止计时。 5. SDH traffic signal according to the error in order to reduce false alarms generated method claims, characterized in that: the second biggest error detection time if the first time or the maximum error detection to and the accumulated error value is below the detection threshold, the disappearance of an alarm, stop the clock.
Description  Langue du texte original : Chinois

SDH业务中对信号误码降低告警产生次序错误的方法 SDH traffic signal errors in order to reduce false alarms generated method

技术领域 Technical Field

[0001] 本发明涉及光同步数字传输技术(SDH),具体而言,涉及一种光同步数字传输(SDH)设备中由于接收信号出现误码造成告警错误产生顺序以及引起的误倒换,特别是一种在SDH业务中基于接收信号出现误码实现降低SD和EXC告警产生次序错误的方法。 [0,001] The present invention relates to an optical synchronous digital transmission technology (SDH), specifically, to a Synchronous Digital Hierarchy (SDH) equipment to receive the signal due to bit errors caused by errors generated alarms and errors caused by switching the order, in particular An order of appearance in the SDH business the wrong way to achieve lower error EXC SD and alarm generation based on the received signal.

背景技术 Background

[0002] 为了确保SDH业务传送通路的稳定性,网元设备需要根据特定开销字节值实时检测当前接收到的信号,并且根据信号中的误码大小确定是否产生告警并且执行相应的倒换操作。 [0002] In order to ensure the stability of SDH service delivery pathway network elements require real-time detection signal currently received overhead bytes according to a specific value, and determines whether an alarm is generated and perform the appropriate switching operation according to the size of the error signal.

[0003] 根据ITU标准建议,如果出现误码率越限(EXC)告警将触发SF倒换;如果出现信号劣化(SD)告警将触发SD倒换;如果同时出现EXC告警和SD告警,由于EXC告警的优先级高于SD告警,所以根据优先级处理原则,将引起SF倒换。 [0003] According to ITU standards recommend that if the error rate appears more limited (EXC) SF switchover will trigger an alarm; if there is signal degradation (SD) SD switchover will trigger an alarm; if EXC alarms and SD simultaneous alarms, alarms due EXC SD priority than alarm, so according to the principle of priority processing will cause SF switching.

[0004] EXC告警和SD告警体现的是SDH业务中一段时间内的误码和用户设置的检测门限大小情况,而且根据用户设置门限的高低,误码累加时间也不相同,具体可参考ITU标准建议,如表1,2所示。 [0004] EXC alarms and alarm embodies SD SDH business user error and a period of time set by the detection threshold size cases, and high and low limit of the user set threshold, the error accumulation time is not the same, specifically refer to ITU standard recommendations, as shown in Tables 1 and 2. EXC告警和SD告警同为误码越限告警,两者的区别在于用户的设置门限值不同,EXC告警门限通常高于SD告警门限,所以出现EXC告警时信号中误码情况更严重。 SD EXC alarms and alarm limit alarm with the error, the difference lies in the different user set threshold values, EXC SD alarm threshold is usually higher than the alarm threshold, so EXC warning signal when the error condition is more serious.

[0005] 表1 G. 806中对VC-4和VC-3的最大误码检测时间的规定 [0005] Table 1 G. 806 in the provisions of the VC-4 and maximum error detection time of the VC-3

[0006] [0006]

Detector threshold Actual BER >10"3 IO4 IO5 IO6 IO7 IO8 IO9IO"3 10 ms IO"4 10 ms 100ms 10_5 10 ms 100ms 1 s IO"6 10 ms 100ms 1 s 10 s 10_7 10 ms 100ms 1 s 10 s 100 s IO"8 10 ms 100ms 1 s 10 s 100 s 1000s IO-9 10 ms 100ms 1 s 10 s 100 s 1000s 10000s Detector threshold Actual BER> 10 "3 IO4 IO5 IO6 IO7 IO8 IO9IO" 3 10 ms IO "4 10 ms 100ms 10_5 10 ms 100ms 1 s IO" 6 10 ms 100ms 1 s 10 s 10_7 10 ms 100ms 1 s 10 s 100 s IO "8 10 ms 100ms 1 s 10 s 100 s 1000s IO-9 10 ms 100ms 1 s 10 s 100 s 1000s 10000s

[0007] 表2 G. 806中对VC_2,VC-12和VC-Il的最大误码检测时间的规定[0008] [0007] Table 2 G. 806 the maximum error VC_2, VC-12 and VC-Il predetermined detection time [0008]

Detector threshold Actual BER >10-3 10-4 10-5 10-6 10-7 10-810-3 40 ms 10-4 40 ms 400ms 10-5 40 ms 400ms 4 s 10-6 40 ms 400ms 4 s 40 s 10-7 40 ms 400ms 4 s 40 s 400 s 10-8 40 ms 400ms 4 s 40 s 400 s 4 000 s Detector threshold Actual BER> 10-3 10-4 10-5 10-6 10-7 10-810-3 40 ms 10-4 40 ms 400ms 10-5 40 ms 400ms 4 s 10-6 40 ms 400ms 4 s 40 s 10-7 40 ms 400ms 4 s 40 s 400 s 10-8 40 ms 400ms 4 s 40 s 400 s 4 000 s

[0009] 以10_7的检测门限为例,结合ITU标准建议具体说明EXC告警和SD告警的产生和消失方法:如果用户设定的检测门限为10_7,那么最大误码检测时间为100秒,即在100秒内的任意时刻,如果累加误码数超过了10_7的误码门限值Thr,将产生越限告警,如果到100 秒结束时刻累加的误码值仍然低于门限值Thr,将把累加的误码值清0,重新开始误码累加和判断。 [0009] In the detection threshold limit 10_7 example, combining ITU standards recommend specific instructions to generate and disappear methods EXC alarms and SD warning: if you set the detection threshold to 10_7, the maximum error detection time is 100 seconds, ie at any time within 100 seconds, if the accumulated number of errors exceeds the error threshold 10_7 Thr, limit alarm will be generated, if the end of the 100 seconds time accumulated error value remains below the threshold Thr, will the accumulated error value to 0, restart errors accumulate and judgment. 如果已经产生了越限告警,那么在100秒结束时刻,如果累加的误码值低于10_7的误码门限值Thr,那么越限告警将消失。 If the limit alarm has been generated, then the end time of 100 seconds, if the accumulated error value is less than 10_7 error threshold Thr, then the limit alarm will disappear. 根据表中最大误码检测时间与检测门限的关系,可以推断出不同检测门限的误码门限值Thr大小不相等。 According to the table maximum error detection time and detection threshold relationship can be inferred that different detection threshold error threshold Thr unequal size.

[0010] 在实际处理中如果用户设置的SD和EXC告警的检测门限分别为THR1和THR2 (THR1 =n*THR2,n可能为10,IO2, IO3, IO4, IO5或者IO6),接收信号中存在THR1门限的误码(此时设备应该产生EXC告警),网管上往往先产生SD告警,后产生EXC告警,同时原本应该触发SF倒换的设备却触发了SD倒换,造成了业务的错误倒换。 [0010] If the user sets the SD and EXC alarm detection threshold were THR1 and THR2 (THR1 = n * THR2, n may be 10, IO2, IO3, IO4, IO5 or IO6), the received signal in practical treatment THR1 threshold error (in this case the device should generate alarms EXC), the network is often the first SD alarms are generated, after generation of EXC alarm should be triggered at the same time the original SF switching device has triggered the SD switching, resulting in erroneous switching operations.

发明内容 DISCLOSURE

[0011] 本发明目的在于解决SDH业务中误码越限后SD告警和EXC告警产生次序错误的问题,从而降低由于该问题造成的业务SD,SF误倒换的发生,提高SDH网络运行的自愈性。 [0011] The invention aims to solve the problem SDH business errored code EXC SD alarms and alarm generation sequence error, thereby reducing business due to the problems caused by SD, SF switching error occurs, increase the self-healing SDH network operation sex.

[0012] 本发明具体是这样实现的: [0012] The present invention is achieved in particular:

[0013] 一种SDH业务中对信号误码降低告警产生次序错误的方法,包括: [0013] A SDH traffic signal errors in order to reduce false alarms generated, comprising:

[0014] 根据为误码率越限和信号劣化分别设置的检测门限值、最大误码检测时间,进行越限告警; [0014] According to the bit error rate and signal degradation are more limited set of detection thresholds, the maximum error detection time, be more limited alarm;

[0015] 其特征在于: [0015] wherein:

[0016] 设置计时标志,在误码出现时启动计时,同时累加误码值。 [0016] Set the timing mark, start timing when errors occur, while the accumulated error value.

[0017] 所述累加误码值大于检测门限值,产生越限告警,同时清空误码累加值;否则在最大误码检测时间到时后停止计时。 [0017] The accumulated value is greater than the error detection threshold limit alarm generation, and will clear the error accumulation value; otherwise, the maximum error is detected in time to stop the clock after.

[0018] 所述最大误码检测时间到,清空误码累加值,同时清空计时标志启动的计时,停止计时。 [0018] The maximum error detection time to empty the error accumulated value while emptying time stamp start time, stop the clock.

[0019] 发生越限告警并且计时标志启动的计时为零,在越限告警消失后计时标志启动计时,同时累加误码值。 [0019] happen limit alarm and timer starts counting zero mark, disappears after limit alarm time stamp start time, while the accumulated error value.

[0020] 发生越限告警并且计时标志启动的计时非零,所述最大误码检测时间到,则清空计时标志启动的计时,停止计时。 [0020] The occurrence limit alarm and timer starts counting zero mark, the maximum time to error detection, then empty the timing mark start timing and stop timing.

[0021] 如果告警的最大误码检测时间到且累加误码值低于检测门限值,则消失告警,停止计时。 [0021] If the alarm time to the maximum error detection and error accumulation values below the detection threshold, the disappearance of an alarm, stop the clock.

[0022] 采用本发明在设备上进行了多次测试,与现有方法相比,可以明显降低SD告警和EXC告警产生次序错误,减少由于该问题造成的业务SD,SF误倒换事件,从而降低SDH网络SD, SF误倒换的发生概率。 [0022] The present invention conducted a number of tests on the device, compared with the conventional methods, can significantly reduce the SD EXC alarms and alarm generation sequence error, reduce the problems caused by the business SD, SF mistakenly switching event, thereby reducing SDH network SD, SF error probability switchover occurs.

附图说明 Brief Description

[0023] 图1为现有方案EXC告警产生坐标图; [0023] FIG. 1 is a conventional scheme EXC alarm occurs plot;

[0024] 图2为现有方案SD告警产生坐标图; [0024] FIG. 2 for existing programs SD alarm is generated plot;

[0025] 图3为本发明的SD,EXC告警产生坐标图; [0025] FIG. 3 of the present invention SD, EXC alarm occurs plot;

[0026] 图4为本发明的告警产生和消失流程图。 [0026] Figure 4 is an alarm generation and disappearance flowchart invention.

具体实施方式 DETAILED DESCRIPTION

[0027] 以坐标图说明现有方案和本发明的SD告警和EXC告警处理过程说明,参考图1,2, 3。 [0027] In graph explaining SD alarms existing programs and the invention and the EXC warning process described with reference to FIG. 1, 2, 3. 图中横轴t为时间,纵轴err count为误码累加值。 The horizontal axis t is time, and the vertical axis err count for the error accumulated value. 假设EXC告警和SD告警的检测门限分别为THR1和THR2 (THR1 = 10*THR2),EXC告警的最大误码检测时间为T,则SD告警的最大误码检测时间为10T,实际的误码产生时刻为t1;、可能位于0至T之间的任意时刻。 Assume EXC alarms and alarm detection threshold SD were THR1 and THR2 (THR1 = 10 * THR2), EXC alarms maximum error detection time T, the SD alarm maximum error detection time is 10T, the actual bit errors moment t1 ;, may be located at any time between 0 and T.

[0028] 现有方案EXC,SD告警处理参考图1,2。 [0028] existing programs EXC, SD alarm processing with reference to Figure 1. 在检测门限THR1的最大误码检测时间的结束处T时刻,由于误码的累加值可能仍然低于误码门限值Thr,所以将把累加的误码值清0,重新开始误码累加和判断,直至t3时刻误码累加值高于误码门限值,此时将产生EXC告警。 T time at the end of the detection threshold THR1 maximum error detection time due to the error accumulated value may still be less than the error threshold Thr, so will the accumulated error value to 0, restart errors accumulate and judgment until the time t3 error accumulated value is higher than the error threshold, then an alarm will be generated EXC. 由于SD告警最大误码检测时间为10T,所以到达T时刻,误码将继续累加,到达、时刻, 误码累加值超过门限值Thr,产生SD告警,这样SD告警先于EXC告警产生。 Since the SD alarm maximum error detection time 10T, so arrive in time T, the error will continue to accumulate, reach, time, error accumulated value exceeds the threshold value Thr, SD alarms are generated, so that the first generation in EXC SD warning alarm.

[0029] 图3为本发明的处理过程,在本发明中EXC告警最大误码检测时间的结束时刻为ti+T,而SD告警最大误码检测时间的结束时刻为、+10*Τ,所以到达T时刻,即使累加的误码值低于误码门限值Thr也不作误码的清空操作,直至t2时刻,EXC告警和SD告警的误码累加值同时超过门限值Thr,同时产生SD和EXC告警。 Process [0029] FIG. 3 of the present invention, in the present invention EXC alarm end time for the maximum error detection time ti + T, and end time SD alarm maximum error detection time is, + 10 * Τ, so T arrival time, even if the accumulated error value is less than the error threshold Thr not make the error of emptying operation until the time t2, EXC alarms and SD error alarms simultaneously accumulated value exceeds the threshold Thr, while producing SD and EXC alarms. 本发明最大改进点就在于添加了计时启动标志,只有出现了误码,才开始计时统计,对应图3中的从、时刻开始计时和累加误码值等操作。 The biggest improvement is that the point of the present invention to add a timer start flag, and only appeared in error, it began counting statistics, corresponding to Fig. 3 from the moment of timing and cumulative error value and so on. 本发明的具体流程为,可参考图4。 Specific processes of the present invention is, refer to Figure 4.

[0030] 第一步:如果当前没有越限告警而且检测的误码值非0或者误码累加值大于0,则启动计时器,累加告警产生计时,并且分别累加SD和EXC告警误码值,否则至第五步; [0030] The first step: If there is no limit alarm and detection error value other than 0 or error accumulated value is greater than zero, then start the timer, cumulative alarm generation time, and SD and EXC alarms were accumulated error value, or to the fifth step;

[0031] 第二步:如果累加的EXC告警误码值大于门限值,则产生EXC告警,同时清空EXC 告警误码累加值,否则执行第四步; [0031] Step 2: If the alarm EXC accumulated error value is greater than the threshold, an alarm is generated EXC, EXC trap errors while emptying the accumulated value, else the fourth;

[0032] 第三步:如果累加的SD告警误码值大于门限值,则产生SD告警,同时清空SD告警误码累加值,否则执行第四步; [0032] Step 3: If the alarm SD accumulated error value is greater than the threshold, an alarm is generated SD, SD alarm error while emptying the accumulated value, else the fourth;

[0033] 第四步:如果告警的最大误码检测时间到,则清空误码累加值,同时清空告警产生计时;至第八步。 [0033] Step Four: If the alarm time to the maximum error detection, error accumulated value is cleared, and will clear the alarm generation timings; to the eighth step.

[0034] 第五步:如果已经产生SD和/或EXC告警而且告警产生计时为0,则累加告警消失计时,同时累加误码值;否则至第七步;[0035] 第六步:如果告警的最大误码检测时间到且累加的误码值低于门限值,则消失告警,至第八步; [0034] Step five: If you have to produce SD and / or EXC alarms and alarm generation timing is 0, then the sum of the alarm disappear time, while the accumulated error value; otherwise, to the seventh step; [0035] Step Six: If the alarm The maximum time to error detection and error cumulative value is less than the threshold, then disappear warning to eighth step;

[0036] 第七步:如果告警的最大误码检测时间到且告警产生计时非0,则清空告警产生计时。 [0036] Step Seven: If the alarm time to the maximum error detection and alarm generation timing is nonzero, then empty the alarm generation timing.

[0037] 第八步:关停计时器。 [0037] Step Eight: shut down timer.

[0038] 以10_6和10_7的检测门限为例(其中EXC告警的检测门限为10_5,SD告警的检测门限为10_7),结合本文的处理流程说明EXC告警和SD告警的产生和消失方法: [0038] In the detection gate 10_6 and 10_7 limiting example (where EXC alarm detection threshold of 10_5, SD alarm detection threshold is 10_7), combined with the processing described herein and disappear methods generate alarms and SD EXC alarms:

[0039] 第一步:如果当前没有越限告警而且检测的误码值非0或者误码累加值大于0,则启动计时器,累加告警产生计时,并且分别累加SD和EXC告警误码值,否则至第五步; [0039] The first step: If there is no limit alarm and detection error value other than 0 or error accumulated value is greater than zero, then start the timer, cumulative alarm generation time, and SD and EXC alarms were accumulated error value, or to the fifth step;

[0040] 第二步:如果累加的EXC告警误码值大于门限值,则产生EXC告警,同时清空EXC 告警误码累加值。 [0040] Step 2: If the alarm EXC accumulated error value is greater than the threshold, an alarm is generated EXC, EXC trap errors while emptying the accumulated value. 否则至第八步; Otherwise to step eighth;

[0041] 第三步:如果累加的SD告警误码值大于门限值,则产生SD告警,同时清空SD告警误码累加值。 [0041] Step 3: If the alarm SD accumulated error value is greater than the threshold, an alarm is generated SD, SD alarms while emptying the accumulated value of errors. 否则至第八步; Otherwise to step eighth;

[0042] 第四步:如果告警产生计时到了10秒,则清空EXC告警的误码累加值,同时清空告警产生计时;如果告警产生计时到了100秒,则清空SD告警的误码累加值,同时清空告警产生计时;至第八步。 [0042] Step Four: If the alarm is generated timed to 10 seconds, then empty the EXC warning error accumulated value while emptying alarm generation timing; if alarm generation timer to 100 seconds, then empty the SD alarm error accumulated value, at the same time Clear alarm generation timing; to the eighth step.

[0043] 第五步:如果已经产生SD和EXC告警而且告警产生计时为0,则累加告警消失计时,同时累加误码值;否则至第七步; [0043] Step five: If you have to produce SD and EXC alarms and alarm generation timing is 0, then the sum of the alarm disappear time, while the accumulated error value; otherwise, to the seventh step;

[0044] 第六步:如果告警消失计时到了10秒且累加的EXC告警误码值低于门限值,则消失EXC告警,如果告警消失计时到了100秒且累加的SD告警误码值低于门限值,则消失SD 告警,至第八步; [0044] Step Six: If the alarm timed to 10 seconds disappear and the EXC warning the accumulated error value is less than the threshold, then disappear EXC alarm, if the alarm disappears timed to 100 seconds, and the accumulated error value is lower than SD alarm threshold, the disappearance SD alarm to the eighth step;

[0045] 第七步:如果10秒到,且告警产生计时非0,则清空告警产生计时;如果100秒到且告警产生计时非0,则清空告警产生计时。 [0045] Step Seven: If 10 seconds, and the alarm generation timer is non-zero, then empty the alarm generating timing; if 100 seconds and the alarm is generated to the timing of non-zero, then empty the alarm generation timing.

[0046] 第八步:关停计时器。 [0046] Step Eight: shut down timer.

6 6

Citations de brevets
Brevet cité Date de dépôt Date de publication Déposant Titre
US560656318 mai 199525 févr. 1997Pmc-Sierra, Inc.Programmable jump window for sonet compliant bit error monitoring
Classifications
Classification internationaleH04B17/00, H04J3/14
Événements juridiques
DateCodeÉvénementDescription
19 mars 2008C06Publication
14 mai 2008C10Entry into substantive examination
6 juin 2012C14Grant of patent or utility model
9 nov. 2016EXPYTermination of patent right or utility model