CN1394035A - Method for analyzing performance of transmission network and method for getting error block of prospective network background - Google Patents
Method for analyzing performance of transmission network and method for getting error block of prospective network background Download PDFInfo
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Abstract
The invention relates to the method for analyzing the performance of transmission network. The SDH device of the network reports the performance data regularly, then the data is stored. The network management system determines whether the devices in the network are replaced or not within a period of times as well as determines whether the failures have happened or not. The predicted background error block rate can be obtained by averaging multiple historic background error blocks within a period of time, so as to obtain the background error blocks. Comparing the prospective anticipatory data with the trade standard makes the analysis result more accurate. The invention also discloses the method for obtaining the networked anticipatory background error blocks.
Description
The present invention relates to the management domain of telecommunications network, especially a kind of transmission network method for analyzing performance.In addition, the present invention also comprises a kind of method that obtains network expection background block error, and it is the core of the technology of transmission network method for analyzing performance of the present invention, is the technology that realizes transmission network method for analyzing performance most critical, the effect that itself also possesses skills is so be included in the present specification.
Along with developing rapidly of telecommunications, people are increasing to the dependence of telecommunications network, in case telecommunications network generation heavy congestion or fault will be made troubles to people, even cause very serious consequence.Network management monitors network exactly, the state of network and load-bearing capacity constantly monitored and tests, and the service traffics of taking measures where necessary to control, to guarantee making network obtain the most effective utilization in all cases.Network Management Function provides performance management, fault management, configuration management, accounting management, safety management function.Fault management is one group of function that the abnormal conditions of telecommunications network and telecommunication apparatus are monitored, isolated and proofread and correct.Equipment operation security function, situation and controlled function etc. are finished in configuration management.Accounting management is operating position and an expense of measuring miscellaneous service in the net.Safety management is a series of functions that just guarantee in operating network security.Performance management is responsible for the performance of monitoring network, finishes the qualitative data that collect to transmit passage and relevant network element actual motion in the net, for administrative staff provide evaluation, analysis, predict the means of transmission performance.
When the planning and designing of carrying out transmission network and transmission system and evaluation, use network performance index (NPO), claim reference performance index (RPO) again, be called for short performance index.It is a foundation with subjective assessment or other performance evaluation experiences, is target so that satisfied service to be provided to the user, and describes with statistic (being not more than set-point etc. such as mean value, standard deviation or the probability that surpasses certain impairment value).Performance index and not requiring in All Time all satisfy, and only require that the probability that exceeds standard is not more than a certain predetermined numerical value and gets final product.
Existing transmission network method for analyzing performance is such, shown in the flow chart of Fig. 1 prior art transmission network method for analyzing performance:
(1) network management system is obtained the SDH equipment background block error of network and the information of BBER;
(2) network management system compares the BBER that obtains and background block error and ITU-T and the BBER of Chinese SDH network target bit error regulation and the limit value of background block error, and then network can be used within limit value, and then network is unavailable outside limit value.
Provided the correlated performance index of ITU-T below:
ITU-T is the hypothesis digital reference link of total length 27500km with the digital link equivalence, and distribute high bit error performance index for each section of link, so that make the error condition of each section of primary link under the condition that is not higher than this standard, be linked to be the requirement that can satisfy digital signal end-to-end (27500km) normal transmission after the string.
Performance index mainly contain background block error and BBER index.Below we mainly introduce this two kinds of indexs.For transmission network, we are defined as the A end to the end points that the client layer characteristic information is fitted to service layer's network path function, and the end points that adaptive information is recovered is defined as the Z end.Like this, for the transmission network between A end and Z end, SDH equipment generates section overhead and path overhead at the A end when sending each piece, this section overhead and path overhead have the effect that detects error code, solve section overhead and path overhead at the Z end, inconsistent as finding the section overhead and the path overhead that generate with the A end, then think a mistake piece.This section deducted the scope of time of equipment down time and the serious error code of equipment in the period in, how many mistake pieces have been counted, as the background block error of this section in the time.With background block error divided by the piece number that sends altogether in the scope of the time of deducting equipment down time and the serious error code of equipment at this section in the period, BBER that promptly should the time segment.
Because background block error and BBER index are to be mutually related, so only provide 420km, the 280km of ITU-T regulation, the background block error index that the 56km digital section should satisfy below us:
For the 420km digital section, speed 155520kbit/s, 622080kbit/s, the pairing BBER limit value of 2488320kbit/s all are 2.31 * 10
-6
For the 280km digital section, speed 155520kbit/s, 622080kbit/s, the pairing BBER limit value of 2488320kbit/s are respectively 3.08 * 10
-6, 1.54 * 10
-6, 1.54 * 10
-6
For the 56km digital section, speed 155520kbit/s, 622080kbit/s, the pairing BBER limit value of 2488320kbit/s are respectively 5.5 * 10
-7, 2.7 * 10
-7, 2.7 * 10
-7
The shortcoming of existing this transmission network method for analyzing performance is: what network management system was obtained is the background block error of history and the information of BBER, also be to take the BBER that historical background block error and BBER and ITU-T and Chinese SDH network target bit error stipulate and the limit value of background block error to compare then, it can't be predicted background block error and the BBER of following time, obtain the expection of the background block error and the BBER in a future, and then compare with ITU-T and Chinese SDH network target bit error, so its result can only be similar to.That is to say that it does not obtain the method for network expection background block error, also just can only compare, make the analysis result inaccuracy with historical data and ITU-T and Chinese SDH network target bit error.
The object of the present invention is to provide a kind of transmission network method for analyzing performance, because this method has proposed a kind of method that obtains network expection background block error, thereby also just no longer use historical data, but with following anticipatory data, compare with ITU-T and Chinese SDH network target bit error, make analysis result more accurate.
For achieving the above object, solution of the present invention is: a kind of transmission network method for analyzing performance, and the end points that the client layer characteristic information is fitted to service layer's network path function is defined as the A end, and the end points that adaptive information is recovered is defined as the Z end, for the transmission network of holding the Z end from A
The SDH equipment of a, network every a time segment with equipment comprise background block error and BBER reports network management system in interior performance data;
B, a database is set, reports the performance data of network management system to store SDH equipment;
C, network management system are obtained the background block error and the BBER data of a plurality of time segments that comprise in big of the leading time of this network A, Z end in this database;
D, network management system judge that whether this network changed equipment in big of this time, if changed equipment, no longer carry out performance evaluation, as do not change continuation;
E, network management system judge whether network in big of this time fault took place, if fault took place, no longer carried out performance evaluation, continued as fault-free;
F, network management system should the time big section a plurality of time segments that comprise BBER average, obtain expecting BBER;
G, obtain expecting background block error according to the expection BBER;
The BBER of expection BBER that h, network management system will calculate and expection background block error and ITU-T and Chinese SDH network target bit error regulation and the limit value of background block error compare, then network can be used within limit value, and then network is unavailable outside limit value.
In step a, the SDH equipment of network generates section overhead and path overhead at the A end when sending each piece, solve section overhead and path overhead at the Z end, inconsistent as finding the section overhead and the path overhead that generate with the A end, then think a mistake piece, in the scope of time of this segment deduction equipment down time and the serious error code of equipment time, how many mistake pieces have been counted, background block error as this time segment, with the piece number that sends altogether in the scope of background block error divided by the time of deducting equipment down time and the serious error code of equipment at this time segment, as the BBER of this time segment, background block error and BBER are reported network management system.
In step c, should the time big section be set to greater than 24 hours; Simultaneously, in steps d, network management system judges that whether network changed the method for equipment is whether to check in big of this time 24 hours History Performance Data of consecutive miss, then is judged as the equipment changed, in this way as not being the equipment do not changed that then is judged as.
In step e, network management system judge method that whether network fault took place be check in big of this time, whether occur continuously 1 hour before History Performance Data, then be judged as in this way fault took place, as not being then to be judged as fault did not take place.
In step g, the method for calculating the expection background block error according to the expection BBER is that the time of multiply by the time segment of setting with circuit speed be multiply by the expection BBER, draws the expection background block error.
The present invention can also comprise step after step h
The background block error that i, network management system are calculated in the next time segment is no more than C probability: P (background block error in the next time segment is no more than C)
, wherein λ is the expection background block error that step g calculates,
P () represents probability;
The background block error that j, network management system are calculated in following N the time segment all is no more than C probability: regard N time segment as N Bei Nuli experiment,
P (background block error in following N time segment all is no more than C)
The Nth power of=P (background block error in the next time segment is no more than C),
P () represents probability, and network management system according to the background block error in following N the time segment all
Be no more than the performance of C the further evaluating network of probability.
In addition, the present invention also provides a kind of method that obtains network expection background block error, it is the core technology of transmission network method for analyzing performance of the present invention, the end points that the client layer characteristic information is fitted to service layer's network path function is defined as the A end, the end points that adaptive information is recovered is defined as the Z end, for the transmission network of holding the Z end from A
The SDH equipment of a, network every a time segment with equipment comprise background block error and BBER reports network management system in interior performance data;
B, a database is set, reports the performance data of network management system to store SDH equipment;
C, network management system are obtained the background block error and the BBER data of a plurality of time segments that comprise in big of the leading time of this network A, Z end in this database;
D, network management system judge whether this network changed equipment in big of this time, if changed equipment, no longer expect the obtaining of background block error, as do not change continuation;
E, network management system judge whether network in big of this time fault took place, if fault took place, no longer expect the obtaining of background block error, and continue as fault-free;
F, network management system should the time big section a plurality of time segments that comprise BBER average, obtain expecting BBER;
G, obtain expecting background block error according to the expection BBER.
Because in the present invention, the regular reported data of SDH equipment, leave in the database, network management system is obtained the background block error and the BBER of a plurality of time segments that comprise in big of the leading time of this network A, Z end in this database, then a plurality of BBERs are averaged, thereby draw the BBER of following expection, and then also just obtained background block error, these processes have formed a kind of method that obtains network expection background block error, and we can obtain the anticipatory data of background block error by this method.Like this, we just can be without historical data, but with following anticipatory data, compares with ITU-T and Chinese SDH network target bit error, makes analysis result more accurate.
Because the present invention is in the process of the anticipatory data of obtaining background block error, whether this network was changed equipment, whether fault was taken place in big of time, these situations are no longer analyzed and calculated the expection background block error, thereby improved the reliability of obtaining the anxious network performance analysis of expection background block error.
Because in further improvement of the present invention, network management system is utilized the Poisson distribution on the probability theory earlier, the background block error that calculates in the next time segment is no more than C probability, and the background block error that utilizes N Bei Nuli experimental calculation to go out in following N the time segment then all is no more than the individual probability of C.Like this, network management system just can all be no more than the performance of C the further evaluating network of probability according to the background block error in following N the time segment.
Fig. 1 is the flow chart of prior art transmission network method for analyzing performance.
Fig. 2 is the flow chart of transmission network method for analyzing performance of the present invention.
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
In Fig. 2, can be clear that the performing step of transmission network method for analyzing performance of the present invention.
(1) the SDH equipment of network every a time segment with equipment comprise background block error and BBER reports network management system in interior performance data: the SDH equipment of network generates section overhead and path overhead at the A end when sending each piece, section overhead and path overhead have the effect that detects error code, solve section overhead and path overhead at the Z end, inconsistent as finding the section overhead and the path overhead that generate with the A end, then think a mistake piece, in the scope of time of this segment deduction equipment down time and the serious error code of equipment time, how many mistake pieces have been counted, background block error as this time segment, with the piece number that sends altogether in the scope of background block error divided by the time of deducting equipment down time and the serious error code of equipment at this time segment, as the BBER of this time segment, background block error and BBER are reported network management system.SDH equipment generally has the ability that regularly reports performance data, generally is to report once every 15 minutes or 24 hours.Specifically be to report once in 15 minutes or 24 hours, then set up on their own as required by system.
(2) database is set, reports the performance data of network management system to store SDH equipment.Can such as 2 years,, from database, delete automatically for this database automatic setting storage historical data how long, can not influence the capacity of system like this above the data that this time limit deposits.
(3) network management system is obtained the background block error and the BBER data of a plurality of time segments that comprise in big of the leading time of this network A, Z end in this database.The control able to programme of big segment length of this time, big of time is long more, and accuracy of predicting is high more, and the system resource of consumption is also many more.Big of this time is general above 24 hours.
(4) network management system judges that whether this network changed equipment in big of this time, if changed equipment, no longer carry out performance evaluation, as do not change continuation.
Network management system judges that whether network changed the method for equipment is whether to check in big of this time 24 hours History Performance Data of consecutive miss, then is judged as the equipment changed, in this way as not being the equipment do not changed that then is judged as.
(5) network management system judges whether network in big of this time fault took place, if fault took place, no longer carried out performance evaluation, continued as fault-free.
Network management system judge method that whether network fault took place be check in big of this time, whether occur continuously 1 hour before History Performance Data, then be judged as in this way fault took place, as not being then to be judged as fault did not take place.
(6) BBER that network management system should the time big section a plurality of time segments that comprise is averaged, and obtains expecting BBER.This time, the big section a plurality of time segments that comprise were many more, and its result of calculation is accurate more.
(7) obtain expecting background block error according to the expection BBER: the time of multiply by the time segment of setting with circuit speed be multiply by the expection BBER, draws the expection background block error.Formula is:
λ=BT
0P
e, wherein:
B: circuit speed, as 2M, 155M.
T
0: the time of time segment, as 15 minutes, 24 hours.
P
e: the long-term average of BBER.
Like this, we have just calculated the expection background block error λ in the next time segment.Owing to be the prediction of carrying out performance data, so may need to carry out interative computation, promptly the performance data of next time point need be calculated according to the result of calculation of last time.That is to say that the background block error of this calculating is stored in the database, as the historical data of calculating background block error next time.
System can be sent to display with the expection background block error that calculates and show.
(8) BBER stipulated of network management system expection BBER that will calculate and expection background block error and ITU-T and Chinese SDH network target bit error and the limit value of background block error compare, then network can be used within limit value, and then network is unavailable outside limit value.System can with network can with or disabled information be sent to display and show.
(9) background block error in following N the time segment of network management system calculating all is no more than C probability, further estimates the transmission network performance according to this probability then.An index can be set as the case may be, promptly the probability that the background block error in following N time segment all is no more than C is set a limit value, by judge background block error in following N the time segment all be no more than C probability whether above this limit value estimate the transmission network performance whether reach need standard.
Concrete steps are:
The mathematical expectation λ of the background block error of the next time segment that I, calculating will be predicted.Method is with (7).
II, the background block error that calculates in the next time segment are no more than C probability.
If the background block error in time segment of incident A={ is no more than C }, the background block error value in time segment is stochastic variable X: according to Poisson distribution,
P(A)
＝P(X<＝C)
III, regard N time segment as N Bei Nuli test, single test is whether a background block error number in the time segment surpasses C.
Possibility P (Y=N)=C then
N N(P (A)
) N(1-P (A)
) 0=(P (A)
) N
In addition, a kind of method that obtains network expection background block error disclosed in this invention just in time corresponding (1)-(7) in the above-mentioned steps.Because what step (1)-(7) had been narrated in the above is more detailed, so repeat no more.It is the core technology of a kind of transmission network method for analyzing performance of the present invention, the key technical feature of transmission network method for analyzing performance all obtains embodying in the method that obtains network expection background block error, and solve the technical problem of a part separately, so in same application, propose with the transmission network method for analyzing performance.
Claims (9)
1, a kind of transmission network method for analyzing performance, the end points that the client layer characteristic information is fitted to service layer's network path function is defined as the A end, and the end points that adaptive information is recovered is defined as the Z end, for the transmission network of holding the Z end from A,
The SDH equipment of a, network every a time segment with equipment comprise background block error and BBER reports network management system in interior performance data;
B, a database is set, reports the performance data of network management system to store SDH equipment;
C, network management system are obtained the background block error and the BBER data of a plurality of time segments that comprise in big of the leading time of this network A, Z end in this database;
D, network management system judge that whether this network changed equipment in big of this time, if changed equipment, no longer carry out performance evaluation, as do not change continuation;
E, network management system judge whether network in big of this time fault took place, if fault took place, no longer carried out performance evaluation, continued as fault-free;
F, network management system should the time big section a plurality of time segments that comprise BBER average, obtain expecting BBER;
G, obtain expecting background block error according to the expection BBER;
The BBER of expection BBER that h, network management system will calculate and expection background block error and ITU-T and Chinese SDH network target bit error regulation and the limit value of background block error compare, then network can be used within limit value, and then network is unavailable outside limit value.
2, transmission network method for analyzing performance according to claim 1, it is characterized in that: in step a, the SDH equipment of network generates section overhead and path overhead at the A end when sending each piece, solve section overhead and path overhead at the Z end, inconsistent as finding the section overhead and the path overhead that generate with the A end, then think a mistake piece, in the scope of time of this segment deduction equipment down time and the serious error code of equipment time, how many mistake pieces have been counted, background block error as this time segment, with the piece number that sends altogether in the scope of background block error divided by the time of deducting equipment down time and the serious error code of equipment at this time segment, as the BBER of this time segment, background block error and BBER are reported network management system.
3, transmission network method for analyzing performance according to claim 1 and 2 is characterized in that: in step c, should the time big section be set to greater than 24 hours; Simultaneously, in steps d, network management system judges that whether network changed the method for equipment is whether to check in big of this time 24 hours History Performance Data of consecutive miss, then is judged as the equipment changed, in this way as not being the equipment do not changed that then is judged as.
4, transmission network method for analyzing performance according to claim 1 and 2, it is characterized in that: in step e, network management system judge method that whether network fault took place be check in big of this time, whether occur continuously 1 hour before History Performance Data, then be judged as in this way fault took place, as not being then to be judged as fault did not take place.
5, transmission network method for analyzing performance according to claim 1 and 2, it is characterized in that: in step g, the method of calculating the expection background block error according to the expection BBER is, the time of multiply by the time segment of setting with circuit speed be multiply by the expection BBER, draws the expection background block error.
6, transmission network method for analyzing performance according to claim 1 and 2 is characterized in that: also comprise step after step h
The background block error that i, network management system are calculated in the next time segment is no more than C probability: P (background block error in the next time segment is no more than C)
, wherein λ is the expection background block error that step g calculates,
P () represents probability;
The background block error that j, network management system are calculated in following N the time segment all is no more than C probability: regard N time segment as N Bei Nuli experiment,
P (background block error in following N time segment all is no more than C)
The Nth power of=P (background block error in the next time segment is no more than C),
P () represents probability, and network management system according to the background block error in following N the time segment all
Be no more than the performance of C the further evaluating network of probability.
7, a kind of method that obtains network expection background block error, the end points that the client layer characteristic information is fitted to service layer's network path function is defined as the A end, and the end points that adaptive information is recovered is defined as the Z end, for the transmission network of holding the Z end from A,
The SDH equipment of a, network every a time segment with equipment comprise background block error and BBER reports network management system in interior performance data;
B, a database is set, reports the performance data of network management system to store SDH equipment;
C, network management system are obtained the background block error and the BBER data of a plurality of time segments that comprise in big of the leading time of this network A, Z end in this database;
D, network management system judge whether this network changed equipment in big of this time, if changed equipment, no longer expect the obtaining of background block error, as do not change continuation;
E, network management system judge whether network in big of this time fault took place, if fault took place, no longer expect the obtaining of background block error, and continue as fault-free;
F, network management system should the time big section a plurality of time segments that comprise BBER average, obtain expecting BBER;
G, obtain expecting background block error according to the expection BBER.
8, the method that obtains network expection background block error according to claim 7, it is characterized in that: in step a, the SDH equipment of network generates section overhead and path overhead at the A end when sending each piece, solve section overhead and path overhead at the Z end, inconsistent as finding the section overhead and the path overhead that generate with the A end, then think a mistake piece, in the scope of time of this segment deduction equipment down time and the serious error code of equipment time, how many mistake pieces have been counted, background block error as this time segment, with the piece number that sends altogether in the scope of background block error divided by the time of deducting equipment down time and the serious error code of equipment at this time segment, as the BBER of this time segment, background block error and BBER are reported network management system.
9, according to claim 7 or the 8 described methods that obtain network expection background block error, it is characterized in that: in step g, the method of calculating the expection background block error according to the expection BBER is, the time of multiply by the time segment of setting with circuit speed be multiply by the expection BBER, draws the expection background block error.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384153C (en) * | 2005-12-26 | 2008-04-23 | 北京交通大学 | Network performance analysis report system based on IPv6 and its implementing method |
| CN101299636B (en) * | 2008-06-18 | 2011-01-19 | 中兴通讯股份有限公司 | Method for performance treatment using performance buffer |
-
2001
- 2001-06-30 CN CNB011225394A patent/CN1145310C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384153C (en) * | 2005-12-26 | 2008-04-23 | 北京交通大学 | Network performance analysis report system based on IPv6 and its implementing method |
| CN101299636B (en) * | 2008-06-18 | 2011-01-19 | 中兴通讯股份有限公司 | Method for performance treatment using performance buffer |
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| CN1145310C (en) | 2004-04-07 |
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