CN108011654A - Apply the device and virtual method in PLC test systems - Google Patents
Apply the device and virtual method in PLC test systems Download PDFInfo
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- CN108011654A CN108011654A CN201711039663.4A CN201711039663A CN108011654A CN 108011654 A CN108011654 A CN 108011654A CN 201711039663 A CN201711039663 A CN 201711039663A CN 108011654 A CN108011654 A CN 108011654A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1479—Generic software techniques for error detection or fault masking
- G06F11/1482—Generic software techniques for error detection or fault masking by means of middleware or OS functionality
- G06F11/1484—Generic software techniques for error detection or fault masking by means of middleware or OS functionality involving virtual machines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/14—Arrangements for monitoring or testing data switching networks using software, i.e. software packages
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/18—Protocol analysers
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- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The present invention relates to a kind of device and virtual method applied in PLC test systems, including transparent access unit, the carrier sense unit and software platform being connected with the transparent access unit, and the software platform and the transparent access unit and the homogeneous mutual communication of carrier sense unit, the transparent access unit and the carrier sense unit are connected with the Devices to test, wherein described software platform sets corresponding virtual site according to test scene, the software platform controls the transparent access unit that the service message that virtual site is sent is transmitted on power line, the carrier sense unit sends the message received from the power line to the software platform.Present invention employs this virtualization technology, test works well, and test method is flexibly controllable, effectively increases testing efficiency, reduces testing cost.
Description
Technical field
The present invention relates to PLC protocol test technical fields, refer in particular to a kind of device applied in PLC test systems and
Virtual method.
Background technology
PLC is a kind of power line communication technology to emerge, be widely used in computer network, communication, smart home,
Multiple industries such as health care, electric power.In recent years, since people increase the continuous of bandwidth demand, including ADSL, PLC technology
Broadband access technology inside is developed rapidly.Particularly PLC technology, due to making full use of the electric power networks popularized the most
Resource, construction speed is fast, small investment, indoor just to be carried out without wiring by spreading all over the power outlet in each room in high speed
Net, possesses the incomparable advantage of other access ways, therefore is subject to extensive concern both domestic and external.
The protocol test of PLC, including performance test, testing protocol consistency, interoperability testing etc., were specifically tested
Journey performs corresponding test case by test system and carries out.Wherein involved in the testing protocol consistency and interoperation test
PLC network is tested, and in PLC network test, has a kind of test scene, it is necessary to test Devices to test in Multi net voting, multi-site, more
Expression behaviour in level scene.Traditional test method, the real equipment of generally use, coordinates Devices to test to be tested.
For example, it is desired to test whether Devices to test meets expection as three-level from the expression behaviour of node, then need in test environment
A host node and two are configured from node.Meanwhile in order to enable Devices to test level reaches requirement, it is necessary on PLC circuits
Arrange the hardware devices such as attenuator, the signal strength of each node in circuit is controlled.Using above-mentioned test method, test
Of high cost, environment configurations are complicated, once and testing requirement change, environment configurations are also required to synchronous change, therefore not only inadequate
Flexibly, it is less efficient and of high cost.
The content of the invention
For this reason, the technical problems to be solved by the invention are to overcome the efficiency of PLC tests in the prior art low, of high cost
The problem of so as to providing a kind of reduction testing cost and can improve a kind of device applied in PLC test systems of testing efficiency
And virtual method.
In order to solve the above technical problems, a kind of device applied in PLC test systems of the present invention, is used for realization and treats
Measurement equipment simulation test in Multi net voting, multi-layer, multi-site scene, including transparent access unit and the transparent access list
Member connected carrier sense unit and software platform, and the software platform is detectd with the transparent access unit and the carrier wave
The homogeneous mutual communication of unit is listened, the transparent access unit and the carrier sense unit are connected with the Devices to test, its
Described in software platform corresponding virtual site is set according to test scene, the software platform controls the transparent access unit
The service message that virtual site is sent is transmitted on power line, the carrier sense unit will be received from the power line
Message send to the software platform.
In one embodiment of the invention, the software platform by interaction protocol respectively with the transparent access unit
It is in communication with each other with the carrier sense unit.
In one embodiment of the invention, the interaction protocol is TCP.
In one embodiment of the invention, between the transparent access unit and the carrier sense unit, the load
Ripple intercept between unit and the Devices to test and the Devices to test and the transparent access unit between pass through electric power
Line connects.
Present invention also offers a kind of virtual method applied in PLC test systems, utilizes any one above-mentioned dress
Put device under test to be tested, include the following steps：Step S1：Set accordingly according to test scene in the software platform
Virtual site, and construct the service message that the virtual site needs to send；Step S2:The service message is transmitted to institute
State on transparent access unit；Step S3:The industry for being sent virtual site by the software platform control transparent access unit
Business message is sent on power line, and the service message received from the power line is reported to institute by the carrier sense unit
Software platform is stated, is analyzed and is handled by the software platform.
In one embodiment of the invention, between the transparent access unit, carrier sense unit and Devices to test
It is additionally provided with the step of the whole network clock synchronization.
In one embodiment of the invention, between the transparent access unit, carrier sense unit and Devices to test
When carrying out the synchronization of the whole network clock, if the Devices to test is host node, Devices to test sends certain service message specified, institute
Transparent access unit, carrier sense unit are stated according to the received service message, it is actively same into row clock with the Devices to test
Step.
In one embodiment of the invention, between the transparent access unit, carrier sense unit and Devices to test
Carry out the whole network clock it is synchronous when, if the Devices to test is from node, the software platform it is virtual be host node when, it is described soft
Certain service message for specifying of part platform tissue, the power line is sent to by the transparent access unit by the service message
On, the carrier sense unit and the Devices to test are by according to the service message active received from the power line
It is synchronous into row clock with the transparent access unit.
In one embodiment of the invention, the software platform obtains network time by the transparent access unit,
And be sent to service message on the power line by the transparent access unit in specific network time, the carrier wave is detectd
When listening the unit service message received from power line is reported to the software platform, the network for receiving the message is carried
Time.
In one embodiment of the invention, the software platform sets the carrier sense unit to reply ACK messages
Behavior, wherein after service message of the carrier sense unit on the power line received, ACK messages are replied according to setting.
The above technical solution of the present invention has the following advantages over the prior art：
The device and virtual method of the present invention applied in PLC test systems, not only avoid Multi net voting,
Real equipment website subtest is used in multi-layer, multinode test scene, and avoids and is decayed structure by control channel
Multi-layer scene is made, therefore reduces testing cost；At the same time so that behavioral test of the Devices to test under corresponding scene becomes more
Add flexibly, improve testing efficiency.
Brief description of the drawings
In order to make the content of the present invention more clearly understood, the specific embodiment below according to the present invention and combination
Attached drawing, the present invention is described in further detail, wherein
Fig. 1 is the schematic diagram of the present invention for applying the device in PLC test systems；
Fig. 2 is the flow chart of the present invention for applying the virtual method in PLC test systems；
Fig. 3 is the Application Example of software platform process flow of the present invention.
Embodiment
Embodiment one：
As shown in Figure 1, the present embodiment provides a kind of device applied in PLC test systems, it is used for realization and is set to be measured
Standby 14 in Multi net voting, multi-layer, multi-site scene simulation test, it is including transparent access unit 11, single with the transparent access
Member 11 connected carrier sense units 12 and software platform 13, and the software platform 13 and the transparent access unit 11 and
The 12 homogeneous mutual communication of carrier sense unit, the transparent access unit 11 and the carrier sense unit 12 with it is described
Devices to test 14 is connected, wherein the software platform 13 sets corresponding virtual site, the software platform according to test scene
The service message that virtual site is sent is transmitted on power line by the 13 control transparent access units 11, the carrier sense list
Member 12 sends the message received from the power line to the software platform 13.
The device in PLC test systems is applied described in the present embodiment, is used for realization device under test 14 in Multi net voting, more
Simulation test in level, multi-site scene, including transparent access unit 11, carrier sense unit 12 and software platform 13, and
The transparent access unit 11 is connected with carrier sense unit 12, is used for transmission service message, the software platform 13 with it is described
12 homogeneous mutual communication of transparent access unit 11 and the carrier sense unit, the transparent access unit 11 and the carrier wave are detectd
Unit 12 is listened to be connected with the Devices to test 14, to test the Devices to test 14, wherein the software platform 13
Corresponding virtual site is set according to test scene, the software platform 13 controls the transparent access unit 11 by virtual site
The service message of transmission is transmitted on power line, specifically, the service message that the virtual site is sent is put down by the software
Platform 13 is transmitted to the transparent access unit 11, then is sent service message to power line by the transparent access unit 11,
The carrier sense unit 12 sends the service message received from the power line to the software platform 13, by institute
State software platform 13 to be analyzed and handled, passed so as to fulfill in the simulation and processing of virtual site finishing service message, substitution
The method tested in real equipment environment of system, reduces testing cost, improves testing efficiency.
In view of needing virtual website number more when the software platform 13, meet the needs of network message amount is big, it is described
Software platform 13 is in communication with each other with the transparent access unit 11 and the carrier sense unit 12 respectively by interaction protocol.Tool
Body, the interaction protocol is TCP, more reliable can be rapidly performed by handling by the TCP.
Between the transparent access unit 11 and the carrier sense unit 12, the carrier sense unit 12 treats with described
Connected between measurement equipment 14 and between the Devices to test 14 and the transparent access unit 11 by power line.PLC believes
Number it is transmitted by power line, while, it is necessary to makes the transparent access unit 11, carrier sense unit 12, Devices to test 14
Same working frequency range is in, can be communicated.The transparent access unit 11 and the carrier sense unit 12 are supported logical
Cross the software platform 13 and working frequency range is set, easy to test the Devices to test 14 to work on different frequency bands.Specifically
Ground, the message that the software platform 13 needs to send by TCP transmission are single to the transparent access unit 11, the transparent access
Member 11 is sent it on power line.(i.e. transparent access unit and Devices to test are sent all service messages on power line
Service message), by the power line transmission to the carrier sense unit 12, the carrier sense unit 12 is from power line
Upper reception message, the software platform 13 is reported to by TCP.
In order to maintain the clock of virtual site and true website in network synchronous, ensure normal communication, the transparent access
It is between unit 11, carrier sense unit 12, Devices to test 14, it is necessary to synchronous into row clock.To be maintained by central beacon message
Exemplified by the mode of clock synchronization：When the Devices to test 14 is host node, Devices to test 14 sends central beacon, described at this time
Transparent access unit 11, carrier sense unit 12 are according to received central beacon message, actively with Devices to test 14 into row clock
It is synchronous；When the Devices to test 14 be from node, the software platform 13 it is virtual be host node when, 13 groups of the software platform
Central beacon message is knitted, central beacon message is sent on power line by the transparent access unit 11, at this time, the load
When ripple intercepts unit 12, Devices to test 14 is actively carried out according to the central beacon message received with the transparent access unit 11
Clock is synchronous.
The software platform 13 is supported to obtain network time by the transparent access unit 11, supports to be arranged on specific
Network time sends PLC messages；The carrier sense unit 12 is reported to the service message received from power line described
, it is necessary to carry the network time for receiving the message while software platform 13.To the transparent access unit 11, carrier sense
The use of 12 network time of unit stamp, contributes to the more real awareness network situation of virtual site, so as to be conducive to virtual site
The simulation and processing of finishing service message.
In PLC network message interaction, there are a kind of ACK mechanism, i.e., when certain website receives the segment message of other websites,
Need to reply ACK, inform that the website for sending message has been received that its message sent, while characterize and connect in ACK messages
The state of receiving text, mistake etc. is received such as whether existing.If the website for sending message does not timely receive ACK replies, may
Continue to repeat to send message, cause the message in network chaotic.Due to the time requirement very little that ACK is replied, typically in microsecond
Rank, if after message is received from power line and being reported to the software platform 13 by the carrier sense unit 12, then
ACK messages are organized to be sent by the transparent access unit 11 by the software platform 13, it is likely that to be limited more than ACK turnaround times
System, while also increase the complexity of 13 Message processing of software platform.Therefore, ACK messages are by the carrier sense unit 12
Automatically replied after message is received according to setting, set carrier sense unit 12 to need by the software platform 13
Which station replies ACK message is given, which type of ACK message replied, meeting that ACK is replied with this requires.
Embodiment two：
As shown in Fig. 2, the present embodiment provides a kind of virtual method applied in PLC test systems, embodiment is utilized
Apply the device device under test 14 in PLC test systems to be tested described in one, include the following steps：Step S1：
Respective virtual website is set according to test scene in the software platform 13, and constructs the business that the virtual site needs to send
Message；Step S2：The service message is transmitted on the transparent access unit 11；Step S3：By the software platform 13
Control the transparent access unit 11 that the service message that virtual site is sent is sent on power line, the carrier sense unit
The service message received from the power line is reported to the software platform 13 by 12, is analyzed by the software platform
And processing.
The virtual method applied in PLC test systems described in the present embodiment, in the step S1, in the software
Respective virtual website is set according to test scene in platform 13, and constructs the service message that the virtual site needs to send, from
And be conducive to the scene of virtual Multi net voting, multi-site and multi-layer；In the step S2, the service message is transmitted to described
On transparent access unit 11, it is sent to by the transparent access unit 11 on PLC circuits；In the step S3, by described soft
Part platform 13 controls the transparent access unit 11 that the service message that virtual site is sent is sent on power line, the carrier wave
Intercept unit 12 and the service message received from the power line is reported into the software platform 13, wherein the business report
Text includes the service message that the transparent access unit 11 and the Devices to test 14 are sent, and institute is parsed by the software platform 13
State the PLC messages that carrier sense unit 12 reports, analyzed and handled, make it is corresponding judge and response, so as to fulfill
The simulation and processing of virtual site finishing service message, substitute traditional method tested in real equipment environment, drop
Low testing cost, improves testing efficiency.
In order to maintain the clock of virtual site and true website in network synchronous, ensure normal communication, the transparent access
The step of the whole network clock synchronization is additionally provided between unit 11, carrier sense unit 12 and Devices to test 14.Specifically, it is described
Carried out between bright access unit 11, carrier sense unit 12 and Devices to test 14 the whole network clock it is synchronous when, to be measured set if described
Standby 14 be host node, then Devices to test 14 sends service message, and the transparent access unit 11, carrier sense unit 12 are according to receipts
The service message arrived, it is actively synchronous into row clock with the Devices to test 14.If the Devices to test 14 is from node, described soft
Part platform 13 it is virtual be host node when, the 13 organization business message of software platform, passing through the transparent access unit 11 will
Service message is sent on the power line, and the carrier sense unit 12 and the Devices to test 14 will be from the power lines
On the service message that receives it is actively synchronous into row clock with the transparent access unit 11.In addition, the software platform 13
Hold and network time is obtained by the transparent access unit 11, support that be arranged on specific network time passes through institute by service message
Transparent access unit 12 is stated to be sent on the power line；The carrier sense unit 12 will receive industry from the power line
, it is necessary to carry the network time for receiving the message while business message is reported to software platform 13.Transparent connect to described
Enter the use of unit 11,12 network time of carrier sense unit stamp, contribute to the more real awareness network situation of virtual site, from
And be conducive to the simulation and processing of virtual site finishing service message.
In addition, in PLC network message interaction, for ACK mechanism, the software platform 13 sets the carrier sense list
Member 12 replys the behavior of ACK messages：Which type of message ACK is replied for, replys which type of ACK.Wherein described carrier wave is detectd
After listening service message of the unit 12 on the power line received, ACK messages are replied according to setting, so as to avoid to be measured set
14 occur repeatedly message.
For the present invention when testing Multi net voting scene, the software platform 13 needs virtual host node；When test multi-site and
During multi-layer scene, if the Devices to test 14 is from node, the software platform 13 needs virtual host node at the same time and one
It is or multiple from node；If the Devices to test 14 is host node, the software platform 13 needs virtual multiple from node, names
Example explanation：
As shown in figure 3, it is necessary to test Devices to test as the table for acting on behalf of website in PLC bandwidth carrier interconnection agreements
Existing is whether to meet protocol requirement, wherein 1 represents the central beacon message of the simulation of the software platform 13 host node transmission；2 generations
Devices to test 14 described in table sends association request message；3 represent software platform 13 receive the Devices to test 14 association please
Message is sought, simulation host node sends association confirmation message so that the Devices to test 14 networks as first order station point；4 represent institute
State to send after Devices to test 14 networks and find beacon message, the software platform 13 checks the discovery beacon that Devices to test 14 is sent
Whether message meets agreement, if not meeting, the EOT end of test；5, which represent the software platform 13, simulates two level from node, sends and closes
Join request message, specify and its agent node is used as by the Devices to test 14；6 represent the secondary station that the Devices to test 14 forwards
The association request of point, the software platform 13 check whether the association request message of the forwarding meets protocol requirement, if not meeting,
The then EOT end of test；7, which represent the software platform 13, simulates association confirmation message of the host node transmission to two level website；8 represent institute
State Devices to test 14 and forward association confirmation message of the host node to two level website, the software platform 13 checks whether it meets association
View requires, if not meeting, the EOT end of test；9, which represent the software platform 13, simulates the central beacon message of host node transmission, center
Include the time slot allocation information as the Devices to test of agent node and the two level website of simulation in beacon；10 represent the software
Platform 13 checks whether Devices to test 14 meets agreement as the agent beacon message that first-level agent's website is sent.In this checkout area
Jing Zhong, the software platform 13 by coordinating with the transparent access unit 11, carrier sense unit 12, virtual host node and
Two level has reached the test Devices to test 14 as the test for acting on behalf of website expression behaviour and whether meeting protocol requirement from node
Purpose.
In the present invention, the realization of 13 service message of the software platform processing, recommendation uses TTCN-3 (Testing and
Test Control Notation) standard testing language encoded, and compared to common high-level language, it is used more
Add flexibly, help quickly to realize a variety of test scenes.
Obviously, the above embodiments are merely examples for clarifying the description, not to the restriction of embodiment.For
For those of ordinary skill in the art, other multi-form changes can also be made on the basis of the above description or are become
It is dynamic.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change or change thus extended out
Among moving still in the protection domain of the invention.
Claims (10)
1. a kind of device applied in PLC test systems, is used for realization device under test in Multi net voting, multi-layer, multi-site
Simulation test in scene, it is characterised in that：The carrier sense list being connected including transparent access unit, with the transparent access unit
Member and software platform, and the software platform and the transparent access unit and the homogeneous mutual communication of carrier sense unit,
The transparent access unit and the carrier sense unit are connected with the Devices to test, wherein the software platform according to
Test scene sets corresponding virtual site, and the software platform controls the industry that the transparent access unit sends virtual site
It is engaged on message transmissions to power line, the carrier sense unit sends the message received from the power line to described soft
On part platform.
2. the device in PLC test systems is applied according to claim 1, it is characterised in that：The software platform passes through
Interaction protocol is in communication with each other with the transparent access unit and the carrier sense unit respectively.
3. the device in PLC test systems is applied according to claim 2, it is characterised in that：The interaction protocol is
TCP。
4. the device in PLC test systems is applied according to claim 1, it is characterised in that：The transparent access unit
Between the carrier sense unit, between the carrier sense unit and the Devices to test and the Devices to test and institute
State and connected by the power line between transparent access unit.
5. a kind of virtual method applied in PLC test systems, utilizes any one device pair in the claims 1-4
Devices to test is tested, it is characterised in that is included the following steps：
Step S1：Corresponding virtual site is set according to test scene in the software platform, and constructs the virtual site
Need the service message sent；
Step S2：The service message is transmitted on the transparent access unit；
Step S3：Control the transparent access unit that the service message that virtual site is sent is sent to electricity by the software platform
In the line of force, the service message received from the power line is reported to the software platform by the carrier sense unit, by
The software platform is analyzed and handled.
6. the virtual method in PLC test systems is applied according to claim 5, it is characterised in that：It is described transparent to connect
Enter the step that the synchronization of the whole network clock is additionally provided between unit, carrier sense unit and Devices to test.
7. the virtual method in PLC test systems is applied according to claim 6, it is characterised in that：It is described transparent to connect
When entering to carry out the synchronization of the whole network clock between unit, carrier sense unit and Devices to test, if the Devices to test is host node,
Then Devices to test sends certain specified services message, and the transparent access unit, carrier sense unit are according to the received business
Message, it is actively synchronous into row clock with the Devices to test.
8. the virtual method in PLC test systems is applied according to claim 6, it is characterised in that：It is described transparent to connect
When entering to carry out the synchronization of the whole network clock between unit, carrier sense unit and Devices to test, if the Devices to test is from node,
The software platform it is virtual be host node when, certain specified services message of the software platform tissue, transparent is connect by described
Enter unit the service message is sent on the power line, the carrier sense unit and the Devices to test will according to from
The service message received on the power line is actively synchronous into row clock with the transparent access unit.
9. the virtual method in PLC test systems is applied according to claim 6, it is characterised in that：The software is put down
Platform obtains network time by the transparent access unit, and transparent connects service message by described in specific network time
Enter unit to be sent on the power line, the service message received from power line is reported to institute by the carrier sense unit
When stating software platform, the network time for receiving the message is carried.
10. the virtual method in PLC test systems is applied according to claim 5, it is characterised in that：The software is put down
Platform sets the behavior of the carrier sense unit reply ACK messages, wherein the carrier sense unit is on power line is received
Service message after, according to set reply ACK messages.
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| CN201711039663.4A CN108011654A (en) | 2017-10-30 | 2017-10-30 | Apply the device and virtual method in PLC test systems |
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| CN201711039663.4A CN108011654A (en) | 2017-10-30 | 2017-10-30 | Apply the device and virtual method in PLC test systems |
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Cited By (1)
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| CN101136790A (en) * | 2006-09-01 | 2008-03-05 | 中兴通讯股份有限公司 | Cluster managerial automatization test system and method of ethernet switchboard |
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Application publication date: 20180508 |