CN101605348B - Data service simulation method and application system - Google Patents
Data service simulation method and application system Download PDFInfo
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- CN101605348B CN101605348B CN 200810219341 CN200810219341A CN101605348B CN 101605348 B CN101605348 B CN 101605348B CN 200810219341 CN200810219341 CN 200810219341 CN 200810219341 A CN200810219341 A CN 200810219341A CN 101605348 B CN101605348 B CN 101605348B
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Abstract
The invention relates to a data service simulation method and a data service simulation system. The data service simulation method comprises the following steps: judging whether one data service is to be started, if so, total information is captured; the captured information is stored and analyzed in sequence, and a service characteristic database is introduced; service characteristics are compared to judge whether the captured information still exists or not; if so, the captured information is discarded, otherwise, the captured information is saved in the database; an executable script templet is generated according to existent characteristic service; one or a plurality of service simulation programs are generated according to the script templet starting condition; the service simulation programs are executed between a service simulation center and a service providing node, and information is exchanged between a simulation user and the service providing node, therefore, a data service and a core network are more compatible, the workload of related testing is effectively reduced, and the data service product quality can be improved.
Description
Technical field
The present invention relates to data service, core net field, especially relate to a kind of data service simulation method and application system.
Background technology
Development along with data service; Make service product substitute and accelerate that professional individual life cycle constantly shortens, business realizing chain ductility is long in addition; Cause network to safeguard complexity increase etc., to product planning, exploitation, promote, safeguard and cause difficulty with professional.
The main body that present GPRS/EDGE network still carries for data service; Around intrinsic index wireless, core net (wired network) itself; For example the channel allocation success rate, activate success rate, FTP downloading rate, open time delay etc., can not satisfy the quality testing needs of multiple business product.
The product quality inspection is common in respectively produces in the middle of the flowing water, and the network access testing of mobile communication data business, data service Performance Evaluation and fault location need the proper supporting means equally.On the existing detection means, general way is the omnidistance data service testing of adopting manual testing's mode or utilizing traditional testing machine to carry out, and the testing machine has just been gathered the industrialization instrument that some application function of mobile phone carries out automatically, does automatic job.
Simulation aspect about data service has a application number to disclose a kind of method and device of large traffic simulation test of packet data service for the one Chinese patent application file of " 200610011439.X ".
Test parameter configuration according to the control backstage; The data source module that utilization includes general protocol stack and emulation terminal is set up PPP with group data service node and is connected; And on ppp link, carry ICMP, TCP message; Utilize said data source module statistics to send/reply situation and flow,, verify tested base station system Packet data service processing performance through statistical analysis to related data.Can be applicable to different platform and system, can test primary channel and complement channel; The Packet data service of ability simulation base station system.
There is a application number to disclose method about the multi-protocol simulation aspect with state machine simulation multi-protocol simulation flow for the one Chinese patent application file of " 200410080941.7 ".
This method comprises: 201 start the call state machine instance; The said call state machine instance of 202 initialization; 203 receive the processing of message; 204 judge whether the state of said call state machine instance is done state, if, the cleaning work after 206 end finish, otherwise change 205; After the data of 205 pairs of said call state machine instances are handled; 207 judge whether the state of said call state machine instance can shift, if the timer that exists of halted state machine then, and change 204, otherwise 208 hold modes are waited for next time and being handled.Testing process has been simplified in this invention and concrete protocol-independent, and owing to can carry out a plurality of simulation protocols simultaneously, so can carry out the Bulk Call test.
But there is following common defects in prior art: be not the know-how that detects to the data service product.
There is following defective in existing industrial testing module: the testing instrument is only contained multimedia; Agreements such as WAP/HTTP/FTP; Receive physical hardware restricted number (sim), receive the wireless environment quality limitations, can't accomplish not influence under the situation of current business and network configuration and state and carry out voice and packet data concurrent service test in enormous quantities; Influenced factor is many, is unfavorable for doing the parameter proficiency assessment.
There is following defective in available data service analogue technology: lack to the broad applicability of multiple network node such as GSN and service node such as PDSN or other IP networks more the data service disposal ability of the BSS system (comprising BSC, BTS) in the middle of the main test communication network and stable, reliability.Lack in addition the multi-protocols support, the main processing agreement is PPP, TCP/IP protocol suite, in case when using other standalone protocols then can't accomplish simulation and detect.
There is following defective in the existing protocol emulation technology: mainly utilize the action of state machine preset protocol signaling process to generate the multi-protocol simulation of the method realization of source template to network equipments such as NGN, then can't preset one by one for diversified flow process and information emulator that business is leading.
Summary of the invention
The present invention provides a kind of data service simulation method and corresponding system; Main technical solution problem is; Be the basis to catch professional message structure and flow process, realize simulation or playing data for broadcasting service product operation, data business and core network are had bigger compatibility; Avoid the influence of wireless environment, overcome prior art can't to the mobile communication data business product carry out high traffic, efficiently, deep difficult problems such as test.
A kind of data service simulation method, comprising step:
Judge whether to have a data initiation of services, if be judged as be, then the professional perfect information of log-on data is caught; Said perfect information is a gn interface information; The information sequence of catching is stored and analyzed, and be incorporated into database to service feature; Judge behind the service feature relatively whether the information of catching exists, is the information that then abandons if be judged as, otherwise deposits database in; According to the already present service feature of database, generation can be carried out script template; Entry condition according to script template generates one or more service analogue programs; The service analogue program provides between the node in service analogue center and business and carries out, and service analogue center and business provide node generation information interaction;
Said information sequence storage and analysis to catching; And be incorporated into database to service feature; Implementation step is: at first; The professional perfect information of data is caught requirement the perfect information of partial data business conduct is each time duplicated, said perfect information comprises the GTP signaling, and business information and partial data business conduct are the limited number of times repetition of single professional family from startup-mutual-end; Once more, monitor through interface, do not influencing and do not changing under the situation of original operation flow, to service feature, for example ID (USID), IP address, protocol port, session identification (SESSION ID) carry out the collection and the filtration of replication form; Preferably with service feature introduce database to initial data, preprocessed data and reduced data these ensembles of communication preserve;
Said the information sequence analysis of catching is required to support employed communication protocol of data service and known safe agreement, analyze, obtain sequence, the structure of service message stream according to the data structure decoding that can know, and replaceable code element information set in the business information stream; Information set to having same professional family identical sequence architectural feature has uniqueness in database; The said data structure decoding of knowing is analyzed, and comprising decodes according to the protocol type of being supported converts readable content to and from readable content, extract these two steps of service feature information; Said have uniqueness to the information set with same professional family identical sequence architectural feature and be meant that for the same data service with identical services characteristic information structure, its service feature information has uniqueness in database in database; Implementation step is following:
The communication protocol of using according to the data service supported or the type of the security protocol acquisition decoded information of decoding, and convert decoded information to readable decoded information;
From readable decoded information, extract service feature information, comprise destination address, purpose URL, protocol type, flow process step-length, message body size;
With decoded information and service feature information package is ensemble of communication;
According to whether having had identical ensemble of communication in the service feature DIALOG information retrieval database DIALOG, as be judged as otherwise keep, otherwise abandon;
Said according to the already present service feature of database; Generation can be carried out script template; Be meant according to the ensemble of communication that has service feature information of preserving in the database, remove variable content or dynamic content in the ensemble of communication, substitute with variable according to protocol specification; Generate executable information framework, be called script template; And it is following that script template generates step:
The first, the untreated ensemble of communication that has service feature information of reading database;
The second, read service feature information, according to the requirement of service feature parameter, like imsi or host ip or session id or url setting variables corresponding model;
The 3rd, static parameter and dynamic parameter in the analytical information set, wherein dynamic parameter is relevant with service feature information;
The 4th, generate the set of information primitive, the input variable that the dynamic parameter corresponding with service feature information then gathered as primitive according to ensemble of communication; The 5th, the generation of primitive collection can be carried out script template;
Said entry condition according to script template generates one or more service analogue programs; And; The service analogue program provides between the node in service analogue center and business and carries out; Service analogue center and business provide node generation information interaction, are meant according to control information to generate the program that one or more carries out certain script template, through initialization; Carry out and handle, State Control is accomplished the information interaction of carrying out data service with service node.
A kind of data service analogue system; Comprise: data service analog detection central station (Services-Simulated TestingCenter; Be called for short SSTC); Being used for wireless terminal (is Global Security Network to the GSN network; The global safety network) output of inner working forms the service analogue script as the input of said data service analogue system through analyzing and processing, makes the script executing result output to the business service node and with the business service node the mutual of known data service perfect information takes place through parameter configuration;
Wherein, this data service analog detection central station also further comprises: the GSN emulation server is used to accomplish the processing of GTP signaling collection, session control, routing addressing work; Information gateway is used for carrying out message through monitoring and catches, and storage; The business diagnosis emulating server is used for the Business Stream ensemble of communication is analyzed, and based on service feature model generation script, simulates one or more operation flows according to trigger condition invoke script template;
Wherein, this business diagnosis emulating server also comprises: the business diagnosis engine, be used for business information stream being decoded according to known communication specification, and obtain abstract Workflow messages set, and the uniqueness of inspection Business Stream ensemble of communication; The service scenario engine is used for being the script template of standard according to the abstract Business Stream ensemble of communication arrangement that obtains; The service analogue engine is used for reading the data of script template memory cell, generates the service analogue trace routine; Memory cell is used to store the original Business Stream ensemble of communication of catching, the script information data.
The invention has the beneficial effects as follows; This data service simulation method and system realize and can be the basis to catch professional message structure and flow process; Realize simulation or playing data for broadcasting service product operation; Data business and core network are had bigger compatibility, effectively reduce workload, help improving the data service product quality dependence test.
Description of drawings
Fig. 1 is the sketch map of the data service simulation method of the embodiment of the invention;
Fig. 2 is the information gateway of the embodiment of the invention carries out the method for monitoring reception to data traffic signaling and message a sketch map;
Fig. 3 is the sketch map of the business diagnosis processing engines method of the embodiment of the invention;
Fig. 4 is the sketch map of the service scenario processing engines method of the embodiment of the invention;
Fig. 5 is the sketch map of the service analogue processing engines method of the embodiment of the invention;
Fig. 6 is the sketch map of the guiding Packet Data Protocol activated system of the embodiment of the invention;
Fig. 7 is the sketch map of the data service analogue system of the embodiment of the invention.
Embodiment
The present invention is an example with the HTTP browse service, and a kind of data service simulation method and system are provided, and can realize learning and duplicates this professional reciprocal process, reaches and can repeat to simulate this professional purpose.
In conjunction with accompanying drawing this programme is implemented to describe.
Fig. 1 is the data service simulation method sketch map; Before simulating, can specify specific path or the processing method of simulation game process that makes specific APN activation to APN (Access Point Name); Simplify the pilot process of simulation; Resource contention for example, traffic interference, content charging etc.; Activate standard according to PDP in addition, can select to use self-defined user ISDN resource, can carry out big service analogue and don't need network authentication.It comprises that step s101 arrives step s106:
Step s101, the initiation message gateway is monitored gn interface message.In the middle of preset environment, we can start an operation flow or select a destination object to monitor.
Step s102, information gateway monitor in step s101 and get access to service message stream, can separate GTP signaling and service message in the gn interface information; The data service process of an independent completion; Need carry out the PDP activation of GTP agreement earlier, the demand according to business set up behind the GTP passage is addressed to business service provides node (SP/CP etc.), initiates actions such as HTTP GET, POST; And business service provides node also to respond accordingly; After this time business information all transmits completion, carry out the PDP deexcitation, finish a professional sample.It is to be analyzed that the information that this process is obtained deposits database etc. in chronological order in.Its detailed process is as shown in Figure 2, comprises that following step s201 arrives step s205:
Step s201 starts the GTP signaling monitoring;
Step s202, the GTP signaling receives, and judges type according to signaling data packet header, obtains flags parameters such as length;
Step s203, the success of GTP signaling response, the expression signaling is set up process and is accomplished, and the follow-up business process will begin, and carry out service message and monitor;
Step s204 monitors and finishes, and service message begins to receive;
Step s205, service message receive and finish, and information temporary storage is gone into database.
Step s103, the business diagnosis engine carries out protocol-decoding to the business information stream of step s102.
Step s104, business diagnosis engine generate the readable information set according to the service feature of step s103.Wherein the detailed process of above-mentioned steps s103, s104 is as shown in Figure 3, comprises that step s301 arrives step s306:
Step s301 reads the business information flow data that s205 deposits in;
Step s302 decodes according to the protocol type of being supported, converts readable content to;
Step s303 extracts service feature information from readable content, comprise destination address, purpose URL, protocol type, flow process step-length, message body size etc.;
Step s304, decoded information and characteristic information are packaged as ensemble of communication;
Step s305 according to whether having had identical information set in the characteristic information searching database, as is judged as otherwise keeps, otherwise abandons;
Step s306, current available information collection warehouse-in.
Step s105, service scenario engine extract and the process information collection, generate the script template of standard, and detailed process is as shown in Figure 4, comprise that step s401 is to s405:
Step s401, the untreated information set of reading database;
Step s402 reads the business model data, according to the requirement of service feature parameter, and like imsi, host ip, sessionid, url etc. set the variables corresponding model;
Step s403, static parameter and dynamic parameter that analytical information is concentrated, wherein dynamic parameter is relevant with business model;
Step s404 generates the set of information primitive according to information set, and the dynamic parameter of business model is as the input variable of primitive set;
Step s405 can carry out script with the generation of primitive collection.
Step s106, the service analogue engine forms one or more service analogue instance program according to the script template that trigger condition invocation step s105 generates, and detailed process is as shown in Figure 5, comprises that step s501 is to s510:
Step s501 starts the service analogue engine;
Step s502 reads the service analogue input parameter, like class of business, and number resource, professional scale, the time interval, number of repetition etc.;
Step s503 generates one or more instances;
Step s504 imports script template;
Step s505, the GSN emulation server is set up the correlative GTP signalling path;
Step s506, instance is carried out script;
Step s507, whether the inspection script finishes, is then to carry out s510 if be judged as, otherwise carries out s508;
Step s508 sends information according to script to the business service node;
Step s509 judges or the response of latency services service node, if response success is then carried out s506, if carry out s510, wherein need support overtimely, retransmits and retransmits number of times and overflow judgement such as the state of grade, retransmits and successfully then carries out s506, and number of times overflows then carries out s510;
Step s510, script executing finishes, and waits for and waking up next time.
In addition, as shown in Figure 6 based on the message flow of GPRS/EGPRS network, description comprises:
1) wireless terminal is initiated network insertion message, activates the PDP message request
2) SGSN initiates to create the PDP message request to GGSN
3) GGSN response SGSN distributes information such as access address
4) SGSN response wireless terminal
5) wireless terminal initiates to insert request to service node
6) service node response wireless terminal (user)
7) data interaction between wireless terminal and the service node comprises business tine, conditional code mutual
8) wireless terminal is initiated service ending message
9) service node returns acknowledge message
10) SSTC catches above information process
11) SSTC simulation SGSN initiates to create the signaling of PDP message request to GGSN
12) GGSN response SSTC
13) SSTC initiates the service access request to service node
14) service node response SSTC
15) between SSTC and the service node data interaction takes place
16) SSTC initiates service ending message
17) service node returns acknowledge message
Fig. 7 is the sketch map of the data service analogue system of the embodiment of the invention; Comprising data service analog detection central station (Services-Simulated Testing Center; Be called for short SSTC); Be used for wireless terminal forming the service analogue script through analyzing and processing, make the script executing result output to the business service node and take place known mutual with it through parameter configuration to the input of the inner working of GSN network output as system.
This service analogue inspection center station can further include: the GSN emulation server is used to accomplish the processing of GTP signaling collection, session control, work such as routing addressing; Information gateway is used for carrying out message through monitoring and catches, and storage; The business diagnosis emulating server is used for the analysis of Business Stream information set, based on service feature model generation script, simulates one or more operation flows according to trigger condition invoke script template.
Business diagnosis server wherein also can comprise: the business diagnosis engine, be used for business information stream being decoded according to known communication specification, and obtain abstract Workflow messages collection, and the uniqueness of inspection message collection; The service scenario engine is used for being the executable code template of standard according to the abstract information set arrangement that obtains; The service analogue engine is used to extract the script template memory cell, generates the service analogue trace routine; Memory cell is used to store the original business information collection of catching, data such as script information.
The used techniques make use of the present invention the notion of black box through to the study of the input and output message of business with duplicate the effect that reaches service analogue; Can realize that the data service product detects; Also can accomplish simultaneously the network equipment and detect, solve prior art and can only be used for network equipment detection.Broken through the bottleneck such as test intensity, density, the degree of depth of prior art.And has independence equally with most of agreements.
Embodiment disclosed herein is exemplary, and it only is for explanation that the present invention is made an explanation, and is not limitation of the present invention, and improvement and the expansion that those skilled in the art will envision that are included within protection scope of the present invention.
Claims (1)
1. data service analogue system comprises:
Data service analog detection central station; Be used for exporting input to wireless terminal to the inner working of GSN network as said data service analogue system; Form the service analogue script through analyzing and processing, make the script executing result output to the business service node and the mutual of known data service perfect information takes place with the business service node through parameter configuration;
Wherein, this data service analog detection central station also further comprises: the GSN emulation server is used to accomplish the processing of GTP signaling collection, session control, routing addressing work; Information gateway is used for carrying out message through monitoring and catches, and storage; The business diagnosis emulating server is used for the Business Stream ensemble of communication is analyzed, and based on service feature model generation script, simulates one or more operation flows according to trigger condition invoke script template;
Wherein, this business diagnosis emulating server also comprises: the business diagnosis engine, be used for business information stream being decoded according to known communication specification, and obtain abstract Business Stream ensemble of communication, and the uniqueness of inspection Business Stream ensemble of communication; The service scenario engine is used for being the script template of standard according to the abstract Business Stream ensemble of communication arrangement that obtains; The service analogue engine is used for reading the data of script template memory cell, generates the service analogue trace routine; Memory cell is used to store the original Business Stream ensemble of communication of catching, the script information data.
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101808084B (en) * | 2010-02-12 | 2012-09-26 | 哈尔滨工业大学 | Method for imitating, simulating and controlling large-scale network security events |
| CN101883340B (en) * | 2010-06-30 | 2014-04-30 | 中兴通讯股份有限公司 | Method and device for short message interaction |
| KR102379202B1 (en) * | 2015-09-30 | 2022-03-28 | 삼성전자주식회사 | Electronic apparatus and the booting method thereof |
| CN105703953B (en) * | 2016-03-08 | 2019-02-15 | 中国联合网络通信集团有限公司 | A kind of determining method and system of OTT service resources consumption |
| CN110019511B (en) | 2017-09-30 | 2021-10-22 | 华为技术有限公司 | Communication method and communication device thereof |
| CN110719179A (en) * | 2018-07-11 | 2020-01-21 | 阿里巴巴集团控股有限公司 | Data processing method, device and system for communication service |
| CN109273077B (en) * | 2018-10-08 | 2021-08-31 | 北京万东医疗科技股份有限公司 | Data processing method and device and intelligent equipment |
| CN109309931A (en) * | 2018-11-23 | 2019-02-05 | 冲石通信技术（北京）有限公司 | Test method, device and the media emulation server of performance of mobile communication system |
| CN111125264B (en) * | 2019-12-12 | 2021-05-28 | 跬云(上海)信息科技有限公司 | Extra-large set analysis method and device based on extended OLAP model |
| CN111274157B (en) * | 2020-02-27 | 2022-08-12 | 深圳平安医疗健康科技服务有限公司 | Test data simulation method and device, computer equipment and storage medium |
| CN112765014B (en) * | 2021-01-04 | 2024-02-20 | 光大兴陇信托有限责任公司 | Automatic test system for multi-user simultaneous operation and working method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1826796A (en) * | 2003-07-18 | 2006-08-30 | 英国电讯有限公司 | Test device for data services |
| CN1842035A (en) * | 2005-08-03 | 2006-10-04 | 中国移动通信集团公司 | Data service performance testing method and apparatus based on mobile communication network |
| CN101146101A (en) * | 2007-07-04 | 2008-03-19 | 中兴通讯股份有限公司 | Protocol analysis system and method based on decoding and coding data service |
-
2008
- 2008-11-24 CN CN 200810219341 patent/CN101605348B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1826796A (en) * | 2003-07-18 | 2006-08-30 | 英国电讯有限公司 | Test device for data services |
| CN1842035A (en) * | 2005-08-03 | 2006-10-04 | 中国移动通信集团公司 | Data service performance testing method and apparatus based on mobile communication network |
| CN101146101A (en) * | 2007-07-04 | 2008-03-19 | 中兴通讯股份有限公司 | Protocol analysis system and method based on decoding and coding data service |
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