CN101252758A - Communication network simulation system and intelligent simulation method - Google Patents
Communication network simulation system and intelligent simulation method Download PDFInfo
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- CN101252758A CN101252758A CNA2008100659530A CN200810065953A CN101252758A CN 101252758 A CN101252758 A CN 101252758A CN A2008100659530 A CNA2008100659530 A CN A2008100659530A CN 200810065953 A CN200810065953 A CN 200810065953A CN 101252758 A CN101252758 A CN 101252758A
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Abstract
The invention discloses a communication network simulation system and an intelligent simulation method. The communication network simulation system comprises an intelligent controlling module respectively connected with a signaling simulation module and a terminal simulation module control backstage in a communication way; the control backstage provides statistical information on the user action distribution for the intelligent controlling module, the intelligent controlling module performs intelligent controlling over the signaling simulation module according to the statistical information, so that the signaling simulation module generates services according to the probability distribution of a variety of actions in the statistical information. The intelligent simulation method adopts the steps that the statistical information on the user action distribution under the actual operating scene is acquired; during the process that a simulation user replace the real terminal to initiate a service request for testing the network system, according to the distribution probability of the user actions in the statistical information, the service type initiated by the simulation user can be determined at random, and the action parameters in the completed service of the simulation user can also be determined at random.
Description
Technical field
The present invention relates to communication network, relate in particular to a kind of communication network simulation system and a kind of communication network Intelligent Simulation Method.
Background technology
Current mobile communications network just advances with very fast speed, and the quality of communication network device and performance have directly influenced the efficient and the income of network operation, in the communication network of reality operation, needs to handle the service request of great amount of terminals.In present communication network device manufacturer's laboratory owing to be subject to the resource input, be difficult to use numerous true terminals to come the test communications network equipment, therefore before communication network device was delivered for use, the scene that needs to construct closing to reality operation was as far as possible carried out validation test and performance test to it.
Figure 1 shows that the structure chart of present communication network simulation system, comprising:
And the base station system 104 of the wireless connections between the terminal is used for the miscellaneous service that initiate the receiving terminal, hands to mobile switch system 105 after treatment;
The mobile switch system 105 that can be connected with a plurality of base station systems 104 is set up connection between the terminal of initiating service request and destination that terminal is asked;
With the signaling emulation module 101 of base station system 104 direct communications, be used for the control flows signal that the emulation great amount of terminals is initiated service request, the control flows flow process under the emulation great amount of terminals access situation;
Specialized protocol processing module 102 with base station system 104 direct communications, be used for after great amount of terminals is initiated service request, in the call establishment and the media stream service frame after the call setup success, finish the processing of traffic frame encapsulation and decapsulation, the media stream service frame under the emulation great amount of terminals access situation.
The terminal emulation module controls backstage 103 that signaling emulation module 101 is mutual is used to provide man-machine interface to the test operation personnel, and transmitting control commands and receiving information reports.
As can be seen from the above description, in the communication network simulation system, use terminal emulate method to replace a large amount of true terminals, initiate a large amount of service request, reach the purpose of network apparatus test, and saved the resource input.
But in the existing communication network (WSN) emulation system, the terminal traffic request of terminal emulate method institute emulation is to initiate according to pre-set call model and parameter, and the behavior of each emulation terminal is consistent, just stack quantitatively.When for example tested speech is professional, but 200 terminals of setting terminal emulation module emulation, and every emulation terminal is initiated voice service request simultaneously, the successfully back same all maintenances of voice service request 10 seconds, discharge then, same more all cross 15 seconds and initiate voice service request next time, so circulate.And under the scene of actual operation, each terminal all is to be controlled by independent user, can initiate various business at any time, and the time that keeps and the time of next service request all are unfixed.
Just there are some limitation in the existing communication network (WSN) emulation system when doing validation test like this, the just simple operation of carrying out the initiation service request of emulation user, service request to tested mobile communications network input just simply repeats stack, therefore scene that can not the actual operation of complete simulation has some problems also just to be difficult to be found in the laboratory.
Summary of the invention
Technical problem to be solved by this invention provides a kind of communication network simulation system and Intelligent Simulation Method, this communication network simulation system and Intelligent Simulation Method are utilized the statistical information under the actual operation scene, user behavior distributional difference under the actual operation of the reflection scene.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be:
A kind of communication network Intelligent Simulation Method may further comprise the steps: A, obtain the statistical information that user behavior under the actual operation scene distributes; B, utilize the emulation user according to described statistical information test network.
Described method, wherein, described statistical information comprises the distribution probability of customer service type, the professional successfully distribution probability of back retention time of setting up, the distribution probability of blanking time after business discharges successfully, the user uses the ratio of terminal protocol version number.
Described method, wherein: described step B comprises following processing: according to described statistical information, determine that at random the emulation user initiates professional type, and determine the behavior parameter of emulation user in finishing business at random.
Described method, wherein, described behavior parameter comprises the retention time after this professional foundation, and initiates professional blanking time of next time; Described step B comprises the steps: customer service type distribution probability in B1, the described statistical information of foundation, and this initiates the type of service request to determine the emulation user, and initiates service request, sets up corresponding service; The professional successfully distribution probability of back retention time of setting up determines the retention time after this business is set up at random in B2, the described statistical information of foundation; B3, described retention time then after, initiate professional release; The distribution probability of blanking time after business discharges successfully in B4, the described statistical information of foundation, the blanking time of next business is initiated in decision at random; B5, described blanking time then after, return step B1, initiate service request next time.
Described method wherein,, is monitored each emulation user's professional performance, and is reported when noting abnormalities in the B5 process at described step B1.
Described method wherein, also comprised step B0 before described step B1: according to the ratio that user in the described statistical information uses terminal protocol version number, determine each emulation user terminal protocol version.
Described method, wherein, when customer service type in the statistical information during according to even distribution, among the described step B1 user this initiate service request type and obtain as follows: B11, according to different kinds of business proportion in the described statistical information, determine the span of all kinds of business in regulation numerical value interval; B12, in described regulation numerical value interval, get a random number, in any type of service span, determine this to initiate the type of service request according to this random digit.
Described method, wherein, when the customer call retention time was satisfied Poisson distribution in the statistical information, the retention time among the described step B2 after this professional foundation obtained as follows: B21, obtain this type of service sets up successfully retention time average afterwards from described statistical information; B22, call the algorithm of getting the Poisson distribution random number, import this retention time average, obtain the retention time value of a random number that satisfies Poisson distribution after as this professional foundation.
Described method, wherein, when the customer service requesting interval time is satisfied Poisson distribution in the statistical information, initiate professional blanking time of next time among the described step B4 and obtain as follows: B21, from described statistical information, obtain described service request average blanking time; B22, call the algorithm of getting the Poisson distribution random number, import this service request average blanking time, obtain a random number that satisfies Poisson distribution as initiating professional value blanking time next time.
A kind of communication network simulation system, comprise signaling emulation module, specialized protocol processing module, terminal emulation module controls backstage, base station system and mobile switch system, it is characterized in that: also comprise an intelligent control module, the backstage communication is connected described intelligent control module with the terminal emulation module controls with described signaling emulation module respectively; The statistical information that described control backstage provides user behavior to distribute for described intelligent control module, described intelligent control module carries out Based Intelligent Control according to described statistical information to described signaling emulation module, makes the probability distribution that described signaling emulation module takes place according to various actions in the described statistical information generate professional.
Described system, wherein, described intelligent control module also is used to monitor described signaling emulation module business and finishes situation, and the abnormal conditions of finding are reported described terminal emulation module controls backstage.
Compared with prior art, the present invention increases in the communication network simulation system respectively and the signaling emulation module intelligent control module that the backstage communication is connected with the terminal emulation module controls; The control backstage provides user behavior distribution statistics information for intelligent control module, and intelligent control module carries out Based Intelligent Control according to statistical information to the signaling emulation module, makes the probability distribution that the signaling emulation module takes place according to various actions in the statistical information generate professional.To press the mode that probability distribution generates in the single generating mode conversion cost invention that repeats of emulation user behavior in the prior art by above improvement, overcome the defective that can't reflect user's distribution situation in reality operation scene in the prior art, with each emulation user in the communication network simulation system as independently individual, has the independent ability that determines next step behavior according to probability, make the more scene of closing to reality operation of communication network simulation system, in the laboratory proofing test, can find more problem and fault.
Description of drawings
Fig. 1 is the structure chart of communication network simulation system in the prior art;
Fig. 2 is the structure chart of communication network simulation system among the present invention;
Fig. 3 realizes principle flow chart for intelligence simulation among the present invention.
Embodiment
With embodiment the present invention is described in further detail with reference to the accompanying drawings below:
Referring to Fig. 2, a kind of communication network simulation system comprises: and the base station system 204 of the wireless connections between the terminal, be used for the miscellaneous service that initiate the receiving terminal, hand to mobile switch system 205 after treatment; The mobile switch system 205 that can be connected with a plurality of base station systems 204 is set up connection between the terminal of initiating service request and destination that terminal is asked; With the signaling emulation module 201 of base station system 204 direct communications, be used for the control flows signal that the emulation great amount of terminals is initiated service request, the control flows flow process under the emulation great amount of terminals access situation; Specialized protocol processing module 202 with base station system 204 direct communications, be used for after great amount of terminals is initiated service request, in the call establishment and the media stream service frame after the call setup success, finish the processing of traffic frame encapsulation and decapsulation, the media stream service frame under the emulation great amount of terminals access situation; With the mutual terminal emulation module controls backstage 203 of signaling emulation module 201, be used to provide man-machine interface to the test operation personnel, transmitting control commands and receiving information reports.
Also comprise intelligent control module 206, intelligent control module 206 is connected with 203 communications of terminal emulation module controls backstage with signaling emulation module 201 respectively; Control backstage 203 provides user behavior distribution statistics information for intelligent control module 206, intelligent control module 206 carries out Based Intelligent Control according to statistical information to signaling emulation module 201, makes the probability distribution that signaling emulation module 201 takes place according to various actions in the statistical information generate professional.Intelligent control module 206 also is used to monitor signaling emulation module 201 business and finishes situation, and with the abnormal conditions reporting terminal emulation module control backstage of finding 203.User behavior distribution statistics information comprises: various types of traffic proportion, each professional successfully average of back retention time of setting up, the average of blanking time after each business discharges successfully, the ratio of each terminal protocol version number.Emulation Client-initiated service request is by intelligent control module 206 controls, and in test, intelligent control module 206 decisions: the service request of this initiation of emulation user is speech business, data service or short message service; Retention time after this professional foundation of emulation user; Blanking time after this professional release of emulation user.Intelligent control module 206 is also monitored each emulation user's professional performance, when noting abnormalities to terminal emulation module controls backstage reporting information.
Referring to Fig. 3, a kind of communication network Intelligent Simulation Method may further comprise the steps:
301, obtain the statistical information that user behavior distributes under the actual operation scene.This information sends to intelligent control module 206 by tester's 203 inputs on terminal emulation module controls backstage by terminal emulation module controls backstage 203.These information comprise the various types of traffic proportion, each professional successfully average of back retention time of setting up, the average of the blanking time after business discharges successfully, the ratio of each terminal protocol version number.User behavior distribution statistics information also comprises: B01: the number of users of distributing telephone numbers; B02: every user BHCA value (busy hour calling amount); B03: every user ERL (Ireland); B04: speech business, data service, short message service accounts for the ratio of total BHCA value respectively on the RT register traffic statistical significance; B05: speech business, data service retention time mean value; B06: speech business, data service, short message service, RT register traffic is divided other duration of a call time average; B07: the distribution of terminal protocol version number, the percentage that each version number is shared.
Following steps 302 to 308, according to the statistical information under the reality operation scene, intelligent control module 206 determines that at random the emulation user uses terminal protocol version number, and the type that determines the service request of this initiation of emulation user again is speech business, data service or short message service; Initiate service request, set up professional; After business is set up successfully, the retention time after this professional foundation of intelligent control module 206 decision emulation users; Retention time then after, initiatively initiate professional release; After business discharges successfully, the blanking time after this professional release of intelligent control module decision emulation user; Blanking time then after, get back to beginning, professional type is initiated in decision next time once more, so circulation.Promptly, utilizing the emulation user to replace in the process of true terminal originating service request test network system, probability according to user behavior distribution in the statistical information, determine that at random the emulation user uses terminal protocol version number, initiates professional type, and determine the behavior parameter of emulation user in finishing business at random.Described behavior parameter comprises the retention time after this professional foundation, initiates professional blanking time of next time.
302:, determine each emulation user terminal protocol version according to the ratio that user in the statistical information uses terminal protocol version number.For each emulation user, intelligent control module 206 is determined emulation user's terminal protocol version number according to the statistical information under the reality operation scene, and the terminal protocol version number that adopts in the follow-up test promptly is fixed up.
303, intelligent control module is according to the statistical information under reality operation scene, this initiates the type of service request to determine the emulation user, when customer service type in the statistical information during according to even distribution, this initiates the user service request type and obtains as follows:
According to different kinds of business proportion in the statistical information, determine the span of all kinds of business in regulation numerical value interval.For example, for satisfying the behavior that is evenly distributed, determine the span of various actions between regulation numerical value interval 0～99 according to the ratio of various actions.Get random number in this scope, in any type of service span, determine this to initiate the type of service request according to this random digit.Suppose that speech business and data service account for 30% and 70% respectively, get 0～99 random number x,, then initiate voice service request,, then initiate the data service request as 30≤x＜100 as 0≤x＜30.Before each emulation user initiated service request at every turn, the service request type of intelligent control module 206 these initiations of decision was speech business, data service or short message service.
304, initiate service request, set up corresponding service.
305, after business is set up successfully, the retention times after Based Intelligent Control mould 206 these business of decision emulation users of determining are set up; When the distribution probability of customer call retention time in the statistical information satisfied Poisson distribution, Poisson distribution was the common discrete probability distribution that arrives in a kind of statistics and the Probability, was suitable for describing the number of times that chance event takes place in the unit interval.Retention time obtains according to the following steps:
From statistical information, obtain this type of service and set up successfully back retention time average; Obtain random number according to Poisson distribution.That is, call the algorithm of getting the Poisson distribution random number, import this retention time average, obtain the retention time value of a random number that satisfies Poisson distribution after as this professional foundation.For example: call holding time satisfies Poisson distribution, average is 60, then when intelligent control module 206 is determined call holding time at every turn, calls the algorithm of getting the Poisson distribution random number, the parameter of input average 60 obtains the call holding time of a random number as this.
306, the retention time then after, initiate professional release;
307, the distribution probability of blanking time after discharging successfully according to business in the statistical information, the blanking time of business next time is initiated in decision at random; When the customer service requesting interval time is satisfied Poisson distribution in the statistical information, initiate professional blanking time of next time and obtain as follows:
From statistical information, obtain earlier service request average blanking time;
Call the algorithm of getting the Poisson distribution random number then, import this service request average blanking time, obtain a random number that satisfies Poisson distribution as initiating professional value blanking time next time.
308, blanking time then after, execution in step 303 is initiated service request next time.
From the whole circulation of step 301 to 308, intelligent control module 206 is monitored each emulation user's professional performance, and reports to terminal emulation module controls backstage 203 when noting abnormalities.Intelligent control module 206 comprises the monitoring of each emulation user's professional performance: after one time service request is set up service fail, intelligent control module 206 control emulation users repeat to set up this business again twice, next if twice also all fail (totally three failures continuously), then intelligent control module 206 reports a unusual terminal emulation module controls backstage 203 of arriving; After speech business is successfully set up, speech frame is monitored, as the forward direction speech frame of receiving continues to be 1/8 rate frame in 8 seconds, this expression voice quality occurs unusual, then report one unusual to terminal emulation module controls backstage 203; After data service is successfully set up, the data traffic transmission situation is monitored, surpass 50% as the packet packet loss, and packet loss is lasting above 20 seconds, then report a unusual terminal emulation module controls backstage 203 of arriving.
Below in conjunction with a specific embodiment that carries out intelligence simulation implementation method of the present invention is described,
S10: it is as follows to obtain statistics from a certain actual operation scene.
(1) number of users 500000 of distributing telephone numbers, total BHCA (busy hour calling amount) value is about 600K, and always ERL (Ireland) is about 10000.In total BHCA value, speech business accounts for 66%, and data service accounts for 24%, and short message service accounts for 10%;
(2) the retention time average was about 60 seconds after speech business was set up successfully, and the retention time average was about 470 seconds after data service was set up successfully, all met Poisson distribution;
(3) professionally discharges successfully that afterwards blanking time, average was 2940 seconds, meet Poisson distribution;
(4) terminal protocol version number, version number 6 account for 92%, and version number 3 accounts for 8%;
S20: be subject to emulation number of users resource, the emulation number of users is made as 20000 (actual user's number is 500000), accordingly business being discharged successfully, the back is made as ((2940+60) * 20000/500000)-60=60 second blanking time.Among 20000 emulation users, the 1st～18400 emulation user uses 6, the 18401～20000 emulation users of terminal protocol version number to use terminal protocol version number 3;
S30: before each emulation user initiates service request.Intelligent control module 206 is got and is evenly distributed random number x between 0～99, as 0＜=x＜66, then initiates voice service request, as 66＜=x＜90, then initiates the data service request, as 90＜=x＜100, then initiates the short message service request.
S40: initiate service request, set up professional;
S50: professional set up successfully after, if the random number that the complete fulfillment average is 60 Poisson distributions is then got in speech business, the retention time after setting up successfully as speech business; If data service, the random number of then getting the complete fulfillment average and be 47 Poisson distributions multiply by 10 (when average was big, the Poisson distribution random number was calculated more time-consuming, simplified processing so do here) again, the retention time after setting up successfully as data service; If short message service, because short message service need not to keep, so need not to calculate the retention time.
S60: when speech business and data service retention time then after, the emulation user initiatively initiates professional release.After setting up and send short message, business initiates professional release immediately for short message service.
S70: after business discharges successfully, get the random number that the complete fulfillment average is 60 Poisson distributions, as blanking time.
S80: blanking time then after, get back to step S30, initiate service request next time, so circulation.
S90: in the recursive call process of step S80, intelligent control module 206 is monitored the situation of setting up of each emulation customer service request at step S30.After setting up service fail as a service request, repeated attempt is set up this business twice again, if the step of setting up successfully then continuing to begin from step C50 the back is arranged, next if twice also all fail (totally three failures continuously), then report a unusual terminal emulation module controls backstage 203 (103) of arriving, comprise the fault location information of this emulation user necessity during this reports unusually.
S91: after each emulation user speech business is successfully set up, the forward direction speech frame is monitored, as the forward direction speech frame of receiving continues to be 1/8 rate frame (the expression voice quality occurs unusual) in 8 seconds, then report one unusual to terminal emulation module controls backstage 203;
S92: after each emulation user data service is successfully set up, the data traffic transmission situation is monitored, surpass 50%, and packet loss is lasting above 20 seconds, then report one unusually to terminal emulation module controls backstage 203 as the packet packet loss.
Wherein, get the example C language codes following (call the P_Rand function and return random number, parameter La mda is an average) of Poisson distribution random number:
const?int?MAX_VAL＝10000；
Double U_Rand (double a, double b) // evenly distribute
{
double?x＝random(MAX_VAL)；
return?a+(b-a)*x/(MAX_VAL-1)；
}
Double P_Rand (double Lamda) // Poisson distribution
{
double?x＝0，b＝1，c＝exp(-Lamda)，u；
do{
u＝U_Rand(0，1)；
b*＝u；
if(b＞＝c)
x++；
}while(b＞＝c)；
return x；
}
The present invention as independently individual, has the independent ability that determines next step behavior according to probability with each emulation user in the communication network simulation system by increase " intelligent control module " in the communication network simulation system.The mode that generates by probability distribution during emulation user behavior in the prior art is single and generating mode conversion cost that repeat is invented, overcome the defective that can't reflect user's distribution situation in reality operation scene in the prior art, made the more scene of closing to reality operation of communication network simulation system.
Intelligent control module is monitored each emulation user's professional performance among the present invention, make each emulation user have an ability that simply reports unusually as independently individual, accuse terminal use's fault Shen under the similar actual operation scene, make the communication network simulation system have better exception catching ability, thereby in validation test, can find more fault.
Be understandable that, for those of ordinary skills, can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the present invention.
Claims (11)
1, a kind of communication network Intelligent Simulation Method is characterized in that: may further comprise the steps:
A, obtain the statistical information that user behavior under the actual operation scene distributes;
B, utilize the emulation user according to described statistical information test network.
2, method according to claim 1, it is characterized in that described statistical information comprises the distribution probability of customer service type, the professional successfully distribution probability of back retention time of setting up, the distribution probability of blanking time after business discharges successfully, the user uses the ratio of terminal protocol version number.
3, method according to claim 2 is characterized in that: described step B comprises following processing: according to described statistical information, determine that at random the emulation user initiates professional type, and determine the behavior parameter of emulation user in finishing business at random.
4, method according to claim 3 is characterized in that: described behavior parameter comprises the retention time after this professional foundation, and initiates professional blanking time of next time; Described step B comprises the steps:
Customer service type distribution probability in B1, the described statistical information of foundation, this initiates the type of service request to determine the emulation user, and initiates service request, sets up corresponding service;
The professional successfully distribution probability of back retention time of setting up determines the retention time after this business is set up at random in B2, the described statistical information of foundation;
B3, described retention time then after, initiate professional release;
The distribution probability of blanking time after business discharges successfully in B4, the described statistical information of foundation, the blanking time of next business is initiated in decision at random;
B5, described blanking time then after, return step B1, initiate service request next time.
5, method according to claim 4 is characterized in that:, each emulation user's professional performance is monitored, and report when noting abnormalities in the B5 process at described step B1.
6, method according to claim 4 is characterized in that: also comprised step B0 before described step B1: according to the ratio that user in the described statistical information uses terminal protocol version number, determine each emulation user terminal protocol version.
7, method according to claim 4 is characterized in that: when customer service type in the statistical information during according to even distribution, among the described step B1 user this initiate service request type and obtain as follows:
B11, according to different kinds of business proportion in the described statistical information, determine the span of all kinds of business in regulation numerical value interval;
B12, in described regulation numerical value interval, get a random number, in any type of service span, determine this to initiate the type of service request according to this random digit.
8, method according to claim 4 is characterized in that: when the customer call retention time was satisfied Poisson distribution in the statistical information, the retention time among the described step B2 after this professional foundation obtained as follows:
B21, from described statistical information, obtain this type of service and set up successfully back retention time average;
B22, call the algorithm of getting the Poisson distribution random number, import this retention time average, obtain the retention time value of a random number that satisfies Poisson distribution after as this professional foundation.
9, method according to claim 4 is characterized in that: when the customer service requesting interval time is satisfied Poisson distribution in the statistical information, initiate professional blanking time of next time among the described step B4 and obtain as follows:
B21, from described statistical information, obtain described service request average blanking time;
B22, call the algorithm of getting the Poisson distribution random number, import this service request average blanking time, obtain a random number that satisfies Poisson distribution as initiating professional value blanking time next time.
10, a kind of communication network simulation system, comprise signaling emulation module, specialized protocol processing module, terminal emulation module controls backstage, base station system and mobile switch system, it is characterized in that: also comprise an intelligent control module, the backstage communication is connected described intelligent control module with the terminal emulation module controls with described signaling emulation module respectively; The statistical information that described control backstage provides user behavior to distribute for described intelligent control module, described intelligent control module carries out Based Intelligent Control according to described statistical information to described signaling emulation module, makes the probability distribution that described signaling emulation module takes place according to various actions in the described statistical information generate professional.
11, system according to claim 10 is characterized in that: described intelligent control module also is used to monitor described signaling emulation module business and finishes situation, and the abnormal conditions of finding are reported described terminal emulation module controls backstage.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102104503A (en) * | 2009-12-21 | 2011-06-22 | 中国移动通信集团设计院有限公司 | Transmission flow simulating method and equipment for network |
| CN106332163A (en) * | 2015-06-30 | 2017-01-11 | 展讯通信（上海）有限公司 | Functional module testing method and system |
-
2008
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102104503A (en) * | 2009-12-21 | 2011-06-22 | 中国移动通信集团设计院有限公司 | Transmission flow simulating method and equipment for network |
| CN102104503B (en) * | 2009-12-21 | 2013-04-17 | 中国移动通信集团设计院有限公司 | Transmission flow simulating method and equipment for network |
| CN106332163A (en) * | 2015-06-30 | 2017-01-11 | 展讯通信（上海）有限公司 | Functional module testing method and system |
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Application publication date: 20080827 |