CN102325265A - Method for quantitatively evaluating bidirectional network operation performance of cable television - Google Patents
Method for quantitatively evaluating bidirectional network operation performance of cable television Download PDFInfo
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- CN102325265A CN102325265A CN201110193634A CN201110193634A CN102325265A CN 102325265 A CN102325265 A CN 102325265A CN 201110193634 A CN201110193634 A CN 201110193634A CN 201110193634 A CN201110193634 A CN 201110193634A CN 102325265 A CN102325265 A CN 102325265A
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Abstract
The invention discloses a method for quantitatively evaluating the bidirectional network operation performance of a cable television, which comprises the following steps that: 1) evaluation indexes NDR, TDR and EDR for time characteristics of three parameters, i.e. noise, throughput and error rate, wherein, by virtue of the parameters indicating the time characteristics, the degree of degradation of the operation performance of a cable modem termination system can be known more accurately and the degree of impact caused by network degradation to user experience can be known; and 2) in order to more intuitively compare the health condition of the operation of the CMTS and simplify evaluation results, the system converts signal to noise ratio and the error rate into a centesimal-system scoring value DMS through integrated computation, wherein the DMS can indicate the health degree of the network operation or the magnitude of errors generated during the network operation. The method for quantitatively evaluating the bidirectional network operation performance of the cable television is of a very great significance to knowing the overall network performance or the performance of any area, the change of the performance can be seen intuitively and easily, and a very strong guide effect is taken to network planning, reconstruction, optimization, maintenance and the like.
Description
Technical field
The present invention relates to the method that the cable TV network runnability carries out quantitative evaluation.
Background technology
At present the whole network has been realized the whole conversion of transformation of two-wayization of HFC and DTV basically, and actively expanded business such as cable broadband, interactive TV, VPN, HDTV, pay TV and growth momentum good.In cable TV industry technology standard; Stipulated a series of technical indicator; But all be isolate, reflect technical characteristic in a certain respect; Can't come the running status of decision network in the certain hour scope according to the concrete numeral of a certain item or a few indexs, can't quantize to grasp the health degree of network (digitlization).
Network index is changing constantly; The value that changes can only come record with huge database with each time that changes; If think quality comparison sheet network this operation conditions of yesterday, perhaps a section network with b section network quality who good who is bad, need carry out manual work to a large amount of historical datas and compare; Judge with impression then; But if the network of thousands of sections is carried out comparison over a long time, just can not judge, must quantize scoring a large amount of historical datas through artificial impression.The meaning of this comparison is conspicuous, through the quality ordering, could let the network optimization transform and shoot the arrow at the target, and the monitoring through score value is changed could let network operation accurately put in place, thereby improve the total quality of the whole network effectively.The present invention holds the quantification of global network operation health degree in order to realize, we have independently set up this evaluation system according to the experience to the actual operation of network, have defined detailed evaluation index.The essence of this evaluation system is according to vertical (on the time shaft) of several kinds of critical network parameters being analyzed and the health degree of this sheet network is given a mark, characterizing the quality variation of network quality with the score value that quantizes.
Summary of the invention
The technical problem that the present invention solved is to provide the cable TV two-way network runnability to carry out the method for quantitative evaluation, to solve the shortcoming in the above-mentioned background technology.
The cable TV two-way network runnability carries out the method for quantitative evaluation, may further comprise the steps:
1, sets evaluation index NDR, TDR, the EDR of the temporal characteristics of noise, flow, error rate three major types parameter; Can understand the degree that the CMTS runnability is degenerated more accurately by the parameter of these temporal characteristics, the awareness network deterioration is to the influence degree of user's use experience;
2, be the health status that compares the CMTS operation more intuitively; Simplify assessment result; System passes through to integrate computing with signal to noise ratio and two big types of indexs of the error rate; Be converted into a centesimal score value---DMS, the DMS value characterizes the health degree of the network operation, and mistake what produce in other words in the network operation.
The computing formula of DMS:
DMS＝100-{3.1*LOG10[1+”NDR”/100*(40-SNRmin)]+9.3*LOG10[1+”SNDR”/100*(40-SNRmin)]+2.5*
LOG10(1+”EARmax”*”BER1max”)+5*LOG10(1+”SEARmax”*”BER1max”)+3.75*LOG10(1+”EDRmax”*”BER2max”)+8.75*
LOG10 (1+ " SEDRmax " * " BER2max ") this formula is to draw through a large amount of calculation and careful derivation; The variation of each parameter meets the influence to the actual generation of network to the contribution of DMS value in the formula; Because SNR, BER1, BER2 exert an influence to the latter successively, when SNR corrupted to a certain degree, BER1 began DMS is exerted an influence; When BER1 corrupts to a certain degree; BER2 becomes the main contributor to the DMS value again, and be apparent in view to the linear character that influences of DMS value generation the previous stage that every kind of parameter changes from the superficial to the deep, and integrate; Show as DMS at 60 minutes when above, the actual health status of score value calcaneus rete network has the better linearity corresponding relation.Be lower than 60 timesharing and work as DMS, seriously deterioration of network is described, be badly in need of being optimized or transforming; The value of DMS derives from the variation of SNR and BER; Therefore, DMS also is directly perceived, the real picture that the user experiences network, and DMS is very meaningful to the grasp of network in general (or arbitrary section) performance; Changes of properties is prone to intuitively see the network planning, transformation, optimization, maintenance etc. are all had very strong directive function.
Beneficial effect:
Patent of the present invention is very meaningful to the grasp of network in general (or arbitrary section) performance, changes of properties is prone to intuitively see the network planning, transformation, optimization, maintenance etc. are all had very strong directive function.
Embodiment
In order to make best execution mode of the present invention is to set up site and network system earlier, according to integral body, divide other scheme, implement respectively.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection range to be defined by appending claims and equivalent thereof.
Claims (1)
1. the cable TV two-way network runnability carries out the method for quantitative evaluation, it is characterized in that, may further comprise the steps:
(1) evaluation index NDR, TDR, the EDR of the temporal characteristics of setting noise, flow, error rate three major types parameter; Can understand the degree that the CMTS runnability is degenerated more accurately by the parameter of these temporal characteristics, the awareness network deterioration is to the influence degree of user's use experience;
(2) be the health status that compares the CMTS operation more intuitively; Simplify assessment result; System passes through to integrate computing with signal to noise ratio and two big types of indexs of the error rate; Be converted into a centesimal score value---DMS, the DMS value characterizes the health degree of the network operation, and mistake what produce in other words in the network operation.
The computing formula of DMS:
DMS＝100-{3.1*LOG10[1+”NDR”/100*(40-SNRmin)]+9.3*
LOG10[1+”SNDR”/100*(40-SNRmin)]+2.5*
LOG10(1+”EARmax”*”BER1max”)+5*LOG10(1+”SEARmax”*”BER1max”)+3.75*LOG10(1+”EDRmax”*”BER2max”)+8.75*
LOG10 (1+ " SEDRmax " * " BER2max ") this formula is to draw through a large amount of calculation and careful derivation; The variation of each parameter meets the influence to the actual generation of network to the contribution of DMS value in the formula; Because SNR, BER1, BER2 exert an influence to the latter successively, when SNR corrupted to a certain degree, BER1 began DMS is exerted an influence; When BER1 corrupts to a certain degree; BER2 becomes the main contributor to the DMS value again, and be apparent in view to the linear character that influences of DMS value generation the previous stage that every kind of parameter changes from the superficial to the deep, and integrate; Show as DMS at 60 minutes when above, the actual health status of score value calcaneus rete network has the better linearity corresponding relation.Be lower than 60 timesharing and work as DMS, seriously deterioration of network is described, be badly in need of being optimized or transforming.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110193634 CN102325265B (en) | 2011-07-12 | 2011-07-12 | Method for quantitatively evaluating bidirectional network operation performance of cable television |
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| CN 201110193634 CN102325265B (en) | 2011-07-12 | 2011-07-12 | Method for quantitatively evaluating bidirectional network operation performance of cable television |
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| CN102325265A true CN102325265A (en) | 2012-01-18 |
| CN102325265B CN102325265B (en) | 2013-11-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414958A (en) * | 2013-08-21 | 2013-11-27 | 中广有线信息网络有限公司 | Cable television network broad band user experience evaluation system |
| CN107295408A (en) * | 2017-08-03 | 2017-10-24 | 合肥有线电视宽带网络有限公司 | Response method, apparatus and system based on cable TV two-way network runnability |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1564597A (en) * | 2004-04-10 | 2005-01-12 | 华中科技大学 | End-to-end video service method and device thereof |
| CN1584850A (en) * | 2003-08-20 | 2005-02-23 | 联想(北京)有限公司 | Method for passive long-range deterministic system state |
| WO2010037131A1 (en) * | 2008-09-29 | 2010-04-01 | Kabushiki Kaisha Toshiba | System and method for evaluating multiple connectivity options |
| CN101764641A (en) * | 2009-12-22 | 2010-06-30 | 上海磁浮交通发展有限公司 | Train and ground wireless communication synchronous evaluating system and method |
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2011
- 2011-07-12 CN CN 201110193634 patent/CN102325265B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584850A (en) * | 2003-08-20 | 2005-02-23 | 联想(北京)有限公司 | Method for passive long-range deterministic system state |
| CN1564597A (en) * | 2004-04-10 | 2005-01-12 | 华中科技大学 | End-to-end video service method and device thereof |
| WO2010037131A1 (en) * | 2008-09-29 | 2010-04-01 | Kabushiki Kaisha Toshiba | System and method for evaluating multiple connectivity options |
| CN101764641A (en) * | 2009-12-22 | 2010-06-30 | 上海磁浮交通发展有限公司 | Train and ground wireless communication synchronous evaluating system and method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414958A (en) * | 2013-08-21 | 2013-11-27 | 中广有线信息网络有限公司 | Cable television network broad band user experience evaluation system |
| CN107295408A (en) * | 2017-08-03 | 2017-10-24 | 合肥有线电视宽带网络有限公司 | Response method, apparatus and system based on cable TV two-way network runnability |
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| CN102325265B (en) | 2013-11-06 |
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