CN1750487A - System and method for detecting EPA protocol consistency - Google Patents
System and method for detecting EPA protocol consistency Download PDFInfo
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Abstract
This invention relates to EPA protocol conformance testing system and method, which contains EPA tester, network monitor equipment, time synchronous server, standard EPA equipment 1, standard EPA equipment 2, upper tester proxy, tester, tested EPA equipment, wherein the upper tester proxy embedded in tested EPA equipment protocol for receiving control message from tester and sending the received service and response to tester, the tester generating executable test group, executing test process according to test scheduler list determined according to executable test group, analyzing test result and producing test report.
Description
Technical field
The present invention relates to industrial control field, relate in particular to a kind of technology of the EPA product being carried out the EPA testing protocol consistency.
Background technology
In view of Ethernet have open good, be widely used, cheap, traffic rate is high, software and hardware resources is abundant, the global strong advantage of technical support, the capability of sustainable development, the product that possesses the EPA standard will have a large amount of engineerings to use, and the precondition that a large amount of engineering is used is a large amount of products to be arranged by test and authentications such as consistency, interoperabilities.And uniformity test is the basis of other tests such as interoperability.Have only entity, show it is the conformance with standard agreement, just meaningfully carry out other test such as interoperability by uniformity test.But, also the EPA product of using in the industrial control network is not carried out at present the method for EPA testing protocol consistency in the prior art.
Summary of the invention
Technical problem to be solved by this invention is at the EPA product characteristics, to have designed a kind of system and method that the EPA product is carried out the EPA testing protocol consistency.
First technical scheme that solves technical problem of the present invention is to have designed a kind of EPA Protocol Conformance Test System, this system comprises with the lower part: the EPA tester, network monitoring equipment NTD, the time synchronized server, standard EPA equipment 1, standard EPA equipment 2, last tester is acted on behalf of UTA, tester, tested EPA equipment EDUT, integrated agreement realizes consistency explanation PICS/ actualizing additional information explanation PIXIT in described tester, produce ets (executive testing suite) ETS according to ATS and PICS/PIXIT, the test dispatching table of determining according to ets (executive testing suite) leaves in the database; Described time synchronized server provides standard time clock for test macro; Standard EPA equipment 1, standard EPA equipment 2 provide the EPA message of standard for test macro; Network monitoring equipment is used for catching in real time all data messages that transmit on the EPA network and stamps the timestamp that receives; Tested EPA equipment is used to provide the agreement to measurand to realize; Last tester agency is responsible for receiving the control message from tester, and the service or the response that receive are sent to tester, by tester it is write in the test report.Wherein the EPA tester comprises: system administration services part of detecting, application access entity services part of detecting, time synchronized part of detecting, deterministic schedule part of detecting, object properties part of detecting and protocol state machine part of detecting, above each several part is implemented test process according to the test dispatching table, realizes service testing, time synchronized test, deterministic schedule test, object properties test, protocol state machine test to tested EPA object.
Second technical scheme that solves technical problem of the present invention is to have proposed a kind of EPA protocol conformance test method, this method of testing comprises the steps: that the EPA tester reads the PICS/PIXIT file of IUT, check the form of function, performance and the service message of IUT to illustrate whether meet the EPA standard according to the EPA standard; Produce ets (executive testing suite) ETS; Form the test dispatching table; Sequentially encode according to the test dispatching table, and carry out its test process and content, the analytical test result also forms detailed test report, sends into display and shows.Wherein, content measurement comprises: the EPA service testing: comprise the test of system management entity service testing and application access entity services; The test of EPA time synchronized: whether the timing tracking accuracy of test EPA equipment reaches the appointment requirement; EPA deterministic schedule test: the dispatching of test communications scheduling entity; The test of EPA object properties: whether the object properties among the test and management information bank MIB are with the EPA conformance to standard; EPA protocol state machine test: according to the agreement of the state machine in the EPA standard, test its state exchange whether with the EPA standard in define consistent.
The present invention has designed a kind of EPA testing protocol consistency platform and EPA protocol conformance test method, judge whether the EPA product meets the EPA standard agreement, solved the EPA testing protocol consistency problem of EPA product and system, for the check statement is used the testing tool that standard is provided with the matching degree of EPA protocol specification based on equipment under test, system and the engineering of EPA technology, for the devices interconnect between EPA product certification and the different agreement realization of a plurality of producers provides technique guarantee; In addition, the present invention also can be tested EPA product and corrects the mistake of agreement in realizing and offer suggestions.
Description of drawings
Fig. 1 EPA testing protocol consistency platform structure schematic diagram
Fig. 2 EPA consistency testing system functional module structure schematic diagram
Fig. 3 territory upload service test result schematic diagram
Embodiment
Be illustrated in figure 1 as the structure of EPA Protocol Conformance Test System platform, this test platform comprises: the EPA tester, network monitoring equipment NTD, time synchronized server TimeServer, standard EPA equipment 1, standard EPA equipment 2, last tester agency (UTA), tester, tested EPA equipment EDUT, wherein the EPA tester comprises the system administration services part of detecting, application access entity services part of detecting, the time synchronized part of detecting, the deterministic schedule part of detecting, object properties part of detecting and protocol state machine part of detecting, integrated abstract test suite ATS in this tester, tested agreement realizes IUT, agreement realizes that consistency explanation PICS/ actualizing additional information explanation PIXIT is integrated in the tested agreement realization, realize that by abstract test suite ATS and agreement consistency explanation PICS/ actualizing additional information explanation PIXIT generates ets (executive testing suite) ETS, determine the test dispatching table according to ets (executive testing suite), implement test process according to the test dispatching table, realize the EPA service testing, the test of EPA time synchronized, EPA deterministic schedule test, the test of EPA object properties, EPA protocol state machine test, analytical test result and form detailed test report then.Provide standard time clock by time synchronized server TimeServer for the EPA network.Provide the EPA message of standard by standard EPA equipment 1 (ESD1), standard EPA equipment 2 (ESD2) for system, EPA message and above-mentioned standard EPA message with product to be measured when carrying out time synchronized test and deterministic schedule and test compare.
To the exigent test of real-time, catch all data messages that transmit on the EPA network in real time and stamp the timestamp that receives by network monitoring equipment NTD, corresponding message is sent to the EPA tester or test packet is sent to the EPA network, for service testing etc. real-time being required is not that very high test can directly realize the EPA service testing by the EPA tester without network monitoring equipment.Tested EPA equipment EDUT is used to provide the agreement to tested EPA product to realize, need add tester agency (UTA) when carrying out service testing, object properties test and protocol state machine test.
Last tester is acted on behalf of UTA with helping the common interface module that tested agreement realizes that tester LT intercoms mutually under IUT part and the consistency testing system, UTA is embedded in the tested agreement realization, as the client layer in the protocol stack, mainly be when service testing, to use.UTA is responsible for receiving the control message from LT, and call corresponding service interface according to the control content of message and carry out corresponding action, be mainly used in the request service that sends, and the service that receives or the issuing service of response employing information sent to tester, again by writing in the test report behind the tester analytical test result.During test, tester is write service with variable control command is sent to UTA, after UTA receives the control command of tester transmission, call corresponding interface according to the content that variable is write in the data field in the message, send corresponding message, and utilize information distribution services that the message information that receives or send is returned to tester.
Before service testing, realize that in tested agreement the upper strata of IUT embeds tester and acts on behalf of UTA earlier, be used as the client layer of IUT, exercise some functions of client layer, last tester is acted on behalf of UTA realizes IUT as tested agreement point of observation, buffering area and controller:
(1) as the controller of IUT, control IUT sends test packet (mainly being the request service message) and stops to send message in the transmission request message ability of test I UT and when testing non-ACK packet;
(2) as point of observation, observed and recorded IUT sends message and receives the situation of message or service, and the response of perhaps making forms journal file, sends to the EPA tester when the EPA tester need call again;
(3) as buffering area, storage is to a plurality of services of EPA product test.
Be illustrated in figure 2 as EPA testing protocol consistency platform feature module diagram.Test interface provides the approach of control test process for the tester as man-machine interface; Tested agreement realizes that the partly integrated protocols having of IUT realizes the agreement realization additional information PIXIT that Declaration of Consistency PICS is relevant with test, and the service that tested EPA product is realized and the description of object are provided; Integrated abstract test suite in the EPA tester is according to this tester generation system management testing part of abstract test suite ATS, application access entity part of detecting, time synchronized part of detecting, deterministic schedule part of detecting, protocol state machine part of detecting and object properties part of detecting; PICS/PIXIT by abstract test suite ATS and IUT produces ets (executive testing suite) ETS, forms the test dispatching table; Carry out test process according to the test dispatching table, send test packet or receive response message to the EPA network; Analytical test result and form test report then.
This test platform is integrated abstract test suite ATS, agreement realize that the explanation of consistency explanation PICS/ actualizing additional information PIXIT, ets (executive testing suite) ETS, tested agreement realize that IUT and last tester act on behalf of UTA.On this test platform, carry out ETS, measurand is carried out uniformity test, and form detailed test report, send into the display part and show and generate test file by IUT.
Utilize test platform of the present invention, realize that by abstract test suite ATS and agreement consistency explanation PICS/ actualizing additional information explanation PIXIT generates ets (executive testing suite) ETS, obtain the test dispatching table, sequentially encode according to the test dispatching table and to implement its test process, analytical test result and form detailed test report then, thus EPA testing protocol consistency finished to tested EPA product.Particular content and step comprise:
1) static test: the EPA tester reads the PICS/PIXIT file of IUT, and (this document offers the IUT implementor with the form of questionnaire, form corresponding file according to the PICS/PIXIT template then), and this file is carried out static test according to the EPA standard, whether the format description of promptly checking function, performance and some service messages of IUT meets the EPA standard, if do not meet the EPA standard, then must revise the PICS/PIXIT file of IUT, again test is until the test of static test below carrying out again;
2) generation of ets (executive testing suite) ETS: measurand is divided into the test group, and determines the test purpose of each group, extract the abstract test example, and the testing procedure of definite test case, thereby form abstract test suite ATS; The EPA tester is chosen relevant test case according to the PICS/PIXIT file of IUT from abstract test suite ATS, form measurand is tested needed ets (executive testing suite) ETS; ETS can generate automatically and also can manually select test case to form;
3) test dispatching table: form the test dispatching table according to ets (executive testing suite);
4) test execution: tested realization IUT is encouraged/response test with ETS, adopted based on the test execution strategy of explaining, be that test executing device directly calls the execution that makes an explanation of test case among the ETS, and do not need whole test set is compiled preliminary treatment, can observe dynamically and control test process when making test.For each test case, test executing device is sequentially encoded according to the test dispatching table and is carried out its testing procedure, encourage tested realization IUT to make response, in follow-up testing procedure, test executing device receives the protocol Data Unit PDU of tested realization response, decoding and with test case in the PDU that expects compare, provide test result;
5) test report generates: the test record file that test execution produces is analyzed, described specification according to test report and generate test judgement and testing protocol consistency report.The testing protocol consistency report has proved all results of test set, has provided the protocol test consistency with reference to daily record.If test successfully, then test result is PASS; Test is unsuccessful, and then test result is FAIL, and points out the reason of test crash; Then test result that can not illustration is INCONCLUSIVE.
According to abstract test suite generation system management testing part, application access entity part of detecting, time synchronized part of detecting, deterministic schedule part of detecting, protocol state machine tester and object properties part of detecting, the concrete method of testing of each several part is as follows:
(1) EPA service test method
Service testing comprises system management entity service testing and the test of application access entity services.When carrying out the system management entity service testing, test from request service, positive respond services, three aspects of Negative Acknowledgment service.Concerning using the access entity service, the COS in the EPA standard is divided into two kinds: confirm service and non-confirmation service.Concerning non-confirmation service, give UTA by EPA tester transmitting control commands during test, call corresponding interface by UTA and send service to the EPA tester, reference standard relatively judged whether the requirement that conformance with standard defines after the EPA tester was received message; For confirming service, then need to test from three aspects, test I UT sends the ability of request message, the ability that test I UT returns the ability that just responding and test I UT returns Negative Acknowledgment.Test I UT is the same with the service testing of non-confirmation when sending the ability of request message, then send request message excitation IUT by the EPA tester during positive and negative response that test I UT returns and make corresponding response, EPA receives that the message of message heel expection relatively judges whether the conformance with standard requirement.
(2) EPA time synchronized method of testing
Whether the timing tracking accuracy of test EPA equipment reaches the appointment requirement.The EPA standard code, time synchronization protocol can be with reference to RFC 2030 SNTP SNTP or IEEE1588 exact time synchronization agreement.Before the test, equipment under test, testing equipment are that benchmark carries out time synchronized with the time synchronized server all, after finishing synchronously, testing equipment is with broadcast mode transmitting time synchronism detection request message, after equipment under test and time synchronized server are received test packet, stamp local time stamp, return to test response message of testing equipment, testing equipment calculates the time deviation of equipment under test and time synchronized server and the result is sent to the EPA tester according to response message.Consider that time synchronized is a dynamic synchronization process, adopt repeatedly to measure mean value.In addition, because time synchronized server and the equipment under test difference on soft, hardware performance, cause two equipment can have error to stamping timestamp receiving start of heading, cause the error of time deviation to become big, therefore, the performance difference that should at first test out both when test is as a correction value, and the time deviation that test is obtained deducts the time precision value that this correction value is only equipment under test again.
(3) EPA deterministic schedule method of testing
The deterministic schedule uniformity test is only considered the work validity and the accuracy of communication scheduling entity, promptly tests its dispatching, comprises scheduling deviation and dispatching sequence.The message that use is set on the whole system sends situation, the network interface card of network monitoring equipment intercepts the message that sends and receive then, be put in the file, send the EPA tester then to, parameter such as the time of reception of EPA tester by analyzing the message write down, priority, IP address, message length and message format judge whether the communication scheduling management entity of this system carries out work by standard.
(4) EPA object properties method of testing
The object properties test is whether the object properties among the test and management information bank MIB follow the EPA conformance to standard.During test, according to the object properties of EPA standard code, the EPA tester sends the variables corresponding reading and writing and serves to IUT, and whether test I UT can correctly carry out and return corresponding response, the contrast expected result was analyzed after the EPA tester received response message, drew test result.For the variable that can not write, send the service of variable write request to IUT, whether test I UT can correctly return the Negative Acknowledgment message.Carry out object properties when test, should the test and management information bank in all objects.
(5) EPA protocol state machine method of testing
The uniformity test of protocol state machine is to arrange according to the state machine in the EPA standard, each different object is tested according to different separately state machines, test its state exchange whether with the EPA standard in define consistent, and test under corresponding state, can object produce correct behavior.This test comprises the test to following state machine:
1) test of system management entity state machine: whether the realization of the state machine of system management entity meets the EPA standard among the test I UT, and whether the test macro management entity can produce correct behavior under certain state.EPA equipment has NoAddress, Configured, three kinds of states of Unconfigured.The test of EPA system management entity state machine is exactly to give IUT transmitting system management service under certain state, and whether the equipment state of test I UT can be transformed into the state of expection, and whether test I UT can produce correct behavior.During test, the EPA tester reads the equipment state of IUT according to the device asserts service message of IUT, sends service accordingly, then according to the equipment state of upgrading in the device asserts service, judge whether consistent with expection of state exchange, and analyze the response that IUT makes and whether meet expected result.During the fetch equipment state, also can be provided the interface of read states by equipment under test, UTA is stored in the buffering area of UTA by this interface reading state, and the data that testing software reads this buffering area can obtain this state.
2) test of territory management state machine: whether the realization of the state machine of territory management meets the EPA standard among the test I UT, and whether test I UT can produce correct behavior under certain state.Field object has EXITENT, DOWNLOADING, UPLOADING, READY, five kinds of states of INUSE.During test, under certain state, send and serve to IUT accordingly, read the DomainStatus of this field object then, analyze it and whether meet expected result, and whether test I UT can correctly produce corresponding behavior.When reading the state of field object, also can be provided the interface of read states by equipment under test, UTA is stored in the buffering area of UTA by this interface reading state, and the data that testing software reads this buffering area can obtain this state.
3) test of incident management state machine: whether the realization of the state machine of incident management meets the EPA standard among the test I UT, and whether test I UT can correctly produce corresponding behavior.The state machine of incident management comprises the conversion of UNLOCKED and LOCKED two states.During test, the EPA tester sends and changes the event condition monitor service to IUT, come the test event management state machine whether can be transformed into expected result by changing the Enable value, transmitting control commands is given UTA simultaneously, indication IUT sends the event notice service, judges whether IUT can produce corresponding behavior by the expected results under the corresponding state.IUT realization side must provide the interface of the state of reading the incident management state machine, and UTA is stored in the buffering area of UTA by this interface reading state, and the data that testing software reads this buffering area can obtain this state.
Test event when carrying out the EPA testing protocol consistency is to be determined by the ets (executive testing suite) (ETS) that abstract test suite (ATS) and IUTPICS/PIXIT produce, different tested EPA products have different content measurements, below we with territory upload service test specification service testing process.
Be illustrated in figure 4 as the measuring executing process of territory upload service, the territory upload service is a very typical application access entity service, be to confirm service, should test from request message during test, three aspects such as positive response message test, the test of Negative Acknowledgment message test.
At first tester is acted on behalf of UTA in the IUT implantation, carries out static test then, has only through after the static test, and service testing could normally be carried out.
1, request message test
(1) the EPA tester allows its indication IUT transmitting apparatus read the information service message to the UTA transmitting control commands
(2) the EPA tester receives the message that IUT sends
(3) the EPA tester is according to EPA standard analysis message
2, positive response message test
(1) the EPA tester sends territory upload request service message
(2) IUT returns the territory and uploads positive response message
(3) the CTS stand-by period postpones
(4) the EPA tester receives positive response message
(5) the EPA tester is according to EPA standard analysis message
3, Negative Acknowledgment message test
A.DestinationAppID erroneous trigger Negative Acknowledgment
(1) the EPA tester sends territory upload request service message, DestinationAppID erroneous trigger Negative Acknowledgment;
(2) the CTS stand-by period postpones
(3) the EPA tester receives the Negative Acknowledgment message
(4) the EPA tester is according to EPA standard analysis message
B.DestinationObjectID erroneous trigger Negative Acknowledgment
(1) the EPA tester sends territory upload request service message, DestinationAppID erroneous trigger Negative Acknowledgment;
(2) the CTS stand-by period postpones
(3) the EPA tester receives the Negative Acknowledgment message
(4) the EPA tester is according to EPA standard analysis message
C. field object does not allow to download
(1) the EPA tester sends territory upload request service message, DestinationAppID erroneous trigger Negative Acknowledgment;
(2) the CTS stand-by period postpones
(3) the EPA tester receives the Negative Acknowledgment message
(4) the EPA tester is according to EPA standard analysis message
The present invention has designed a kind of EPA testing protocol consistency platform and EPA protocol conformance test method, has solved the EPA testing protocol consistency problem of EPA product and system, for the HIST and the authentication of EPA product are laid a good foundation.
Claims (8)
1, a kind of EPA Protocol Conformance Test System, comprise with the lower part: EPA tester, network monitoring equipment NTD, time synchronized server, standard EPA equipment 1, standard EPA equipment 2, last tester are acted on behalf of UTA, tester, tested EPA equipment EDUT, it is characterized in that, integrated agreement realizes consistency explanation PICS/ actualizing additional information explanation PIXIT, produces ets (executive testing suite) ETS according to ATS and PICS/PIXIT in described tester, and the test dispatching table of determining according to ets (executive testing suite) leaves in the database; Described time synchronized server provides standard time clock for test macro; Standard EPA equipment 1, standard EPA equipment 2 provide the EPA message of standard for test macro; Network monitoring equipment is used for catching in real time all data messages that transmit on the EPA network and stamps the timestamp that receives; Tested EPA equipment is used to provide the agreement to measurand to realize; Last tester agency is responsible for receiving the control message from tester, and the service or the response that receive are sent to tester, by tester it is write in the test report.
2, EPA Protocol Conformance Test System according to claim 1, it is characterized in that, described EPA tester comprises: system administration services part of detecting, application access entity services part of detecting, time synchronized part of detecting, deterministic schedule part of detecting, object properties part of detecting and protocol state machine part of detecting, above each several part is implemented test process according to the test dispatching table, realizes service testing, time synchronized test, deterministic schedule test, object properties test, protocol state machine test to tested EPA object.
3, EPA Protocol Conformance Test System according to claim 1 is characterized in that, described upward tester agency is embedded in the tested agreement realization, as point of observation, buffering area and the controller of tested agreement realization.
4, a kind of EPA protocol conformance test method, it is characterized in that: this method of testing comprises the steps: that the EPA tester reads the PICS/PIXIT file of IUT, check the form of function, performance and the service message of IUT to illustrate whether meet the EPA standard according to the EPA standard; Produce ets (executive testing suite) ETS; Form the test dispatching table; Sequentially encode according to the test dispatching table, and carry out its content measurement; The analytical test result also forms detailed test report, sends into display and shows.
5, method of testing according to claim 4 is characterized in that: described content measurement comprises: the EPA service testing: comprise the test of system management entity service testing and application access entity services; The test of EPA time synchronized: whether the timing tracking accuracy of test EPA equipment reaches the appointment requirement; EPA deterministic schedule test: the dispatching of test communications scheduling entity; The test of EPA object properties: whether the object properties among the test and management information bank MIB are with the EPA conformance to standard; EPA protocol state machine test: according to the agreement of the state machine in the EPA standard, test its state exchange whether with the EPA standard in define consistent.
6, method of testing according to claim 5 is characterized in that: described system management entity service testing is tested from request service, positive respond services, three aspects of Negative Acknowledgment service; The service content of application access entity services comprises the service of confirmation and non-confirmation service, and to non-confirmation service, reference standard is relatively judged the message requirement whether conformance with standard defines that the EPA tester is received; For confirming service, test I UT sends the ability of request message, the ability that test I UT returns the ability that just responding and test I UT returns Negative Acknowledgment.
7, method of testing according to claim 5 is characterized in that, described EPA deterministic schedule test comprises scheduling deviation and dispatching sequence's test.
8, method of testing according to claim 5 is characterized in that: described EPA protocol state machine test comprises: the test of the test of system management entity state machine, territory management state machine, the test of incident management state machine.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867504A (en) * | 2010-06-17 | 2010-10-20 | 中控科技集团有限公司 | Method and device for testing consistency of automation fieldbus |
| CN102521124A (en) * | 2011-11-29 | 2012-06-27 | 大唐移动通信设备有限公司 | Method and system for outputting failure reasons |
| CN104657272A (en) * | 2015-03-04 | 2015-05-27 | 上海华东电信研究院 | Method and system for judging test items in mobile terminal |
| CN106789426A (en) * | 2016-12-22 | 2017-05-31 | 福建瑞之付微电子有限公司 | A kind of universal testing method for ICP/IP protocol stack |
| CN113595810A (en) * | 2021-06-17 | 2021-11-02 | 国网上海能源互联网研究院有限公司 | Interactive testing method and system suitable for power distribution network information |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6373822B1 (en) * | 1999-01-08 | 2002-04-16 | Cisco Technology, Inc. | Data network protocol conformance test system |
| CN1207857C (en) * | 2001-08-08 | 2005-06-22 | 中国科学院计算技术研究所 | Virtual testing system in communication protocal conformance test and its method |
| CN100481780C (en) * | 2003-10-27 | 2009-04-22 | 中国科学院计算技术研究所 | Method for designing cases for testing consistency with protocol of internet of next generation |
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2005
- 2005-10-21 CN CNB2005100573381A patent/CN100393050C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867504A (en) * | 2010-06-17 | 2010-10-20 | 中控科技集团有限公司 | Method and device for testing consistency of automation fieldbus |
| CN102521124A (en) * | 2011-11-29 | 2012-06-27 | 大唐移动通信设备有限公司 | Method and system for outputting failure reasons |
| CN102521124B (en) * | 2011-11-29 | 2014-09-10 | 大唐移动通信设备有限公司 | Method and system for outputting failure reasons |
| CN104657272A (en) * | 2015-03-04 | 2015-05-27 | 上海华东电信研究院 | Method and system for judging test items in mobile terminal |
| CN106789426A (en) * | 2016-12-22 | 2017-05-31 | 福建瑞之付微电子有限公司 | A kind of universal testing method for ICP/IP protocol stack |
| CN113595810A (en) * | 2021-06-17 | 2021-11-02 | 国网上海能源互联网研究院有限公司 | Interactive testing method and system suitable for power distribution network information |
| CN113595810B (en) * | 2021-06-17 | 2023-09-26 | 国网上海能源互联网研究院有限公司 | Interactive testing method and system suitable for power distribution network information |
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| Publication number | Publication date |
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| CN100393050C (en) | 2008-06-04 |
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