CN101668228B - Device and method for testing interface - Google Patents
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- CN101668228B CN101668228B CN200810119379A CN200810119379A CN101668228B CN 101668228 B CN101668228 B CN 101668228B CN 200810119379 A CN200810119379 A CN 200810119379A CN 200810119379 A CN200810119379 A CN 200810119379A CN 101668228 B CN101668228 B CN 101668228B
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Abstract
The invention relates to the field of testing wireless network equipment and discloses a device for testing an interface. The device comprises a packing/unpacking unit, an electro-optical/photoelectric conversion unit and a protocol monitoring and simulating unit, wherein the packing/unpacking unit is used for packing baseband data into Ir interface electric signals or unpacking the Ir interface electric signals into the baseband data, and changing an appointed signaling bit used for simulating abnormal signaling flows according to instructions; the electro-optical/photoelectric conversion unit is used for converting the Ir interface electric signals packed by the packing/unpacking unit into Ir interface light signals transmitted to the equipment to be tested or converting the Ir interface light signals received from the equipment to be tested into the Ir interface electric signals; the protocol monitoring and simulating unit is used for monitoring the signaling bit of an Ir interface protocol contained in the baseband data, and indicating the packing/unpacking unit to change the appointed signaling bit used for simulating the abnormal signaling flows. The invention also discloses a method for testing the interface. The device and the method achieve the simulation and the test for the abnormal signaling flows of the Ir interface protocol.
Description
Technical field
The present invention relates to the Wireless Communication Equipment field tests, relate in particular to a kind of interface test device and method.
Background technology
The TD-SCDMA system is the 3G (Third Generation) Moblie standard that is proposed by China, is one of international three big main flow 3G (Third Generation) Moblie standards.Because time division duplex (TDD, Time Division Duplex) pattern is to The Application of Technology such as the relative flexible Application of frequency spectrum and smart antennas, the application prospect of TD-SCDMA system is more and more wide.Traditional T D-SCDMA Wireless Communication Equipment is as shown in Figure 1, is made up of radio network controller (RNC, Radio Network Controller) and NodeB, and wherein, NodeB accomplishes the function of base station, possesses Base-Band Processing and radio-frequency enabled.When considering the loss of high-frequency signal, require radio frequency (RF, Radio Frequency) the as close as possible antenna of port of base station; Simultaneously, need Base-Band Processing to have carrier management and algorithm upgrade function more flexibly, therefore; Present TD-SCDMA Wireless Communication Equipment is as shown in Figure 2, traditional NodeB is divided into two, wherein; Accomplish radio frequency part function, Base Band Unit (BBU by remote radio unit (RRU) (RRU, Remote Radio Unit); Bandwidth Based Unit) the base band signal process function of a plurality of base stations of completion, the interface between BBU and the RRU is an optical interface, called after Ir interface.
Because it is the BBU and the RRU of different vendor will coexist as in the network, therefore the Ir interface is open, as shown in Figure 3 at present; Showing existing testing apparatus tests BBU and RRU; And the sketch map that Ir interface protocol consistency is tested, because present test is limited by testing apparatus, when testing; The BBU of different vendor and RRU carry out interconnected through the Ir interface; Through the RF index of RF instrumentation test RRU,, come Ir interface protocol consistency is tested through the signaling bit of the monitoring of agreement measuring instrument and analysis BBU and RRU.
For the conforming test of Ir interface protocol, can only monitor and analyze normal signaling process through the agreement measuring instrument at present, and because commercial BBU or RRU can't be used to simulate the exceptional signaling flow process, exceptional signaling flow process that therefore can't testing complex.
Summary of the invention
The present invention provides a kind of interface test device, in order to realize that the exceptional signaling flow process of Ir interface protocol is carried out emulation and test.
Correspondingly, the present invention also provides a kind of interface test method.
A kind of interface test device comprises:
The packing unit is used for base band data is packaged into the Ir interface electric signals, or the Ir interface electric signals is unpacked into base band data; And, change the signaling bit of the appointment be used to simulate the exceptional signaling flow process according to indication;
Electric light/photoelectric conversion unit is used for converting the Ir interface electric signals after the packing of said packing unit to Ir interface light signals, maybe will convert the Ir interface electric signals to from the Ir interface light signal that Devices to test receives;
Agreement monitoring and simulation unit are used for monitoring the signaling bit of the Ir interface protocol that base band data comprises, and the signaling bit of indicating said packing unit to change to be used to the appointment of simulating the exceptional signaling flow process.
A kind of interface test method comprises:
The Ir interface light signal that first Devices to test is sent converts the Ir interface electric signals to;
Ir interface electric signals after the said conversion is unpacked into base band data;
Monitor the signaling bit of the Ir interface protocol that comprises in the said base band data;
Send to change the indication information of the appointment signaling bit that is used to simulate the exceptional signaling flow process;
The base band data that will comprise the signaling bit after the change is packaged into the Ir interface electric signals;
Convert the Ir interface electric signals after the said packing to Ir interface light signal;
With Ir interface optical signal transmission to the second Devices to test after the said conversion; And
Response message to second Devices to test feedback is tested.
The interface test device that the embodiment of the invention provides, packing unit are used for base band data is packaged into the Ir interface electric signals, or the Ir interface electric signals is unpacked into base band data; And, change the signaling bit of the appointment be used to simulate the exceptional signaling flow process according to indication; Electric light/photoelectric conversion unit is used for converting the Ir interface electric signals after the packing of said packing unit to Ir interface light signals, maybe will convert the Ir interface electric signals to from the Ir interface light signal that Devices to test receives; Agreement monitoring is used to monitor the signaling bit of Ir interface protocol with simulation unit, and the signaling bit of indicating said packing unit to change to be used to the appointment of simulating the exceptional signaling flow process.The embodiment of the invention has realized emulation and test to the exceptional signaling flow process of Ir interface protocol through to specifying the change of signaling bit.
Description of drawings
Fig. 1 is a traditional T D-SCDMA Wireless Communication Equipment structure chart in the prior art;
Fig. 2 is based on the TD-SCDMA Wireless Communication Equipment structure chart of BBU and RRU in the prior art;
Fig. 3 is the testing apparatus of test Wireless Communication Equipment in the prior art;
Fig. 4 A is the structure chart of interface test device in the embodiment of the invention;
Fig. 4 B is the form of Ir interface electric signals;
The signal flow graph of Fig. 5 A when the RRU transmitter tested;
The signal flow graph of Fig. 5 B when the BBU receiver tested;
The signal flow graph of Fig. 6 A when the RRU receiver tested;
The signal flow graph of Fig. 6 B when the BBU transmitter tested;
Fig. 7 is the flow chart of a kind of interface test method in the embodiment of the invention;
Fig. 8 is the flow chart of another kind of interface test method in the embodiment of the invention;
Fig. 9 is the flow chart of another interface test method in the embodiment of the invention.
Embodiment
To the problem that exists in the prior art, the embodiment of the invention provides a kind of interface test device and interface test method, has realized emulation and test to the exceptional signaling flow process of Ir interface protocol.In addition, as shown in Figure 3, because when testing; BBU and RRU carry out interconnected through the Ir interface, and BBU and RRU are Devices to tests, therefore can only simultaneously BBU and RRU be tested; And can't realize the independent test of BBU or RRU; This has just caused when the test result of RF instrumentation shows that Devices to test goes wrong, because the radiofrequency signal that RRU produces depends on the light signal that BBU offers RRU, therefore can't confirm that it still is that RRU goes wrong that BBU goes wrong.In the embodiment of the invention, when BBU or RRU were tested, interface test device can directly be connected with Devices to test, and does not rely on other RRU or BBU, thereby has realized the independent test of BBU or RRU.
Be elaborated below in conjunction with the Figure of description specific embodiments of the invention.
Fig. 4 A shows the structure chart of interface test device in the embodiment of the invention, and wherein the function of each unit is following:
Electric light/photoelectric conversion unit 420 is used for converting the Ir interface electric signals after 410 packings of packing unit to Ir interface light signals, maybe will convert the Ir interface electric signals to from the Ir interface light signal that Devices to test receives;
Agreement monitoring and simulation unit 430 are used for monitoring the signaling bit of the Ir interface protocol that base band data comprises, and indication packing unit 410 changes the signaling bit of the appointment that is used to simulate the exceptional signaling flow process.
Wherein, Base band data is meant baseband I Q data; The signaling bit of Ir interface protocol also is a kind of baseband I Q data, and the form of the Ir interface electric signals that packing unit 410 becomes baseband I Q packing data is shown in Fig. 4 B, and can be found out by Fig. 4 B: I data and Q data in the baseband I Q data are 16 bits; Per 24 groups of baseband I Q data are formed 1 Group; 32 Group form 1 Supergroup, and 200 Supergroup form 1 Ir interface electric signals (i.e. 1 sub-frame), the process that this just packs base band data; Otherwise, be the process that the Ir interface electric signals is unpacked.
Can find out that by Fig. 4 A packing unit 410 comprises:
The subelement 412 of unpacking is used for the Ir interface electric signals is unpacked into base band data;
Emulation subelement 413 is used for according to indication, changes the signaling bit of the appointment be used to simulate the exceptional signaling flow process.
It can also be seen that by Fig. 4 A electric light/photoelectric conversion unit 420 comprises:
Electric light conversion subelement 421 is used for converting the Ir interface electric signals after 410 packings of packing unit to Ir interface light signals;
Opto-electronic conversion subelement 422 is used for converting the Ir interface light signal that receives from Devices to test to the Ir interface electric signals.
It can also be seen that by Fig. 4 A the agreement monitoring comprises with simulation unit 430:
Monitoring subelement 431 is used for monitoring the signaling bit of the Ir interface protocol that base band data comprises;
Indication subelement 432 is used to indicate packing unit 410 to change to be used to the signaling bit of the appointment of simulating the exceptional signaling flow process.
In the signal reciprocal process of BBU and RRU; The agreement monitoring can be monitored the Ir interface protocol signaling bit that comprises in the base band data after unpacking with simulation unit 430; The Ir interface test device that the embodiment of the invention provides can be monitored the normal signaling process of Ir interface protocol; Its observation process is identical with prior art, repeats no more here.When needing the exceptional signaling flow process of emulation Ir interface protocol; Can be according to predefined test script; The signaling bit of indicating 410 pairs of packing unit to be used to simulate the appointment of exceptional signaling flow process changes, so that Ir interface protocol consistency is tested.
The exceptional signaling flow process of Ir interface protocol mainly includes but not limited to following 3 kinds:
1, to send to the signaling bit in the signal of RRU (or BBU) be wrong to BBU (or RRU), and then RRU (or BBU) should be able to identify this mistake, and gives BBU (or RRU) according to the corresponding response message of Ir interface protocol feedback;
2, BBU (or RRU) sends to signal of RRU (or BBU), and RRU (or BBU) is at the appointed time internal feedback response message not, but has postponed behind the certain hour just feeding back response information;
3, BBU (or RRU) sends to signal of RRU (or BBU), and RRU (or BBU) does not have feeding back response information.
For first kind of exceptional signaling flow process of emulation; And Ir interface protocol consistency tested, suppose that BBU will send signal to RRU, then at first convert the Ir interface light signal that BBU sends to the Ir interface electric signals by opto-electronic conversion subelement 422; Secondly; By the subelement 412 of unpacking this Ir interface electric signals is unpacked into base band data, once more, monitor by the Ir interface protocol signaling bit that comprises in the base band data of monitoring after 431 pairs on subelement is unpacked; By indicating subelement 432 according to predefined test script; Such as changing a certain signaling bit, the signaling bit of the 413 pairs of appointments of emulation subelement in the indication packing unit 410 changes, and emulation subelement 413 can be according to the indication that receives; Signaling bit to this appointment changes; The base band data that will comprise the signaling bit after the change by packing subelement 411 then is packaged into the Ir interface electric signals, and the Ir interface electric signals after will pack by electric light conversion subelement 421 again converts Ir interface light signal to, pass through subsequently the Ir interface with Ir interface optical signal transmission to RRU.After RRU receives the rub-out signal that BBU sends; Should be able to parse this mistake; And feed back corresponding response message according to the Ir interface protocol and give BBU, said response message is a kind of Ir interface light signal, converts the Ir interface electric signals to through opto-electronic conversion subelement 422; And the subelement 412 of unpacking is unpacked into base band data with this Ir interface electric signals; The Ir interface protocol signaling bit that comprises in the base band data after being unpacked by 431 pairs on subelement of monitoring is then monitored, and whether the response message of analyzing the RRU feedback is consistent with the Ir interface protocol, thereby accomplished the conforming test of Ir interface protocol.
For second kind of exceptional signaling flow process of emulation; And Ir interface protocol consistency tested, suppose that BBU has sent a signal to RRU, the response message of RRU feedback converts the Ir interface electric signals to by opto-electronic conversion subelement 422; Subelement 412 is unpacked into base band data with this Ir interface electric signals by unpacking; And monitor by the Ir interface protocol signaling bit that comprises in the base band data of 431 pairs on subelement of monitoring after unpacking, by indication subelement 432 according to predefined test script, such as postponing to send in 2 seconds response message; 413 pairs of corresponding signaling bit of current response message of indication emulation subelement change; Postpone this signaling bit of redispatching after 2 seconds, emulation subelement 413 will change current signaling bit according to the indication that receives; The base band data that will comprise the signaling bit after the change then is packaged into the Ir interface electric signals; Ir interface electric signals after will pack by electric light conversion subelement 421 again converts Ir interface light signal to, transfers to BBU through the Ir interface then, and BBU receives the response message that RRU feeds back in just can't be at the appointed time like this; BBU should make corresponding reaction according to the Ir interface protocol so; Such as resending its signal of issuing RRU etc., whether monitoring subelement 431 can make correct reaction to BBU is carried out monitoring analysis, thereby realizes the conforming test of Ir interface protocol.
For the third exceptional signaling flow process of emulation, and Ir interface protocol consistency tested, suppose that BBU has sent a signal to RRU; The response message of RRU feedback converts the Ir interface electric signals to by opto-electronic conversion subelement 422, by the subelement 412 of unpacking this Ir interface electric signals is unpacked into base band data, and is monitored by the Ir interface protocol signaling bit that comprises in the base band data of monitoring after 431 pairs on subelement is unpacked; According to predefined test script,, promptly intercept and capture response message by indication subelement 432 such as not sending response message; 413 pairs of corresponding signaling bit of current response message of indication emulation subelement change; This signaling bit of not redispatching, emulation subelement 413 will change current signaling bit according to the indication that receives; The base band data that will comprise the signaling bit after the change then is packaged into the Ir interface electric signals; Ir interface electric signals after will being packed by electric light conversion subelement 421 again converts Ir interface light signal to, transfers to BBU through the Ir interface then, and BBU just can't receive the response message of RRU feedback like this; BBU should make corresponding reaction according to the Ir interface protocol so; Such as resending its signal of issuing RRU etc., whether monitoring subelement 431 can make correct reaction to BBU is carried out monitoring analysis, thereby realizes the conforming test of Ir interface protocol.
In addition, can also utilize above-mentioned Ir interface test device that BBU or RRU are tested separately, describe respectively below.
Shown in Fig. 5 A, the signal flow graph when the RRU transmitter is tested, detailed process is following:
Step a1, standard signal source provide standard baseband I Q data to packing subelement 411;
Step a2, packing subelement 411 are packaged into the Ir interface electric signals with the standard base band data that receives;
Ir interface electric signals after step a3, electric light conversion subelement 421 will be packed converts Ir interface light signal to;
Step a4, through the Ir interface with this Ir interface optical signal transmission to Devices to test RRU;
Step a5, the output signal after handling through RRU is tested through RF instrumentation.
Here, standard signal source and RF instrumentation have guaranteed independence and objectivity that the RRU transmitter is tested.
Shown in Fig. 5 B, the signal flow graph when the BBU receiver is tested, detailed process is following:
Step b1, standard signal source provide standard baseband I Q data to packing subelement 411;
Step b2, packing subelement 411 are packaged into the Ir interface electric signals with the standard base band data that receives;
Ir interface electric signals after step b3, electric light conversion subelement 421 will be packed converts Ir interface light signal to;
Step b4, through the Ir interface with this Ir interface optical signal transmission to Devices to test BBU;
Step b5, the output signal after handling through BBU is tested through the RNC simulator.
Here, the uplink demodulation ability of BBU receiver is analyzed, guaranteed the independence and the objectivity of test through standard signal source and RNC simulator.
Shown in Fig. 6 A, the signal flow graph when the RRU receiver is tested, detailed process is following:
Steps A 1, Devices to test RRU handle the standard signal that is provided by the standard radio frequency signal source, obtain Ir interface light signal;
The Ir interface light signal that steps A 2, opto-electronic conversion subelement 422 will pass through after RRU handles converts the Ir interface electric signals to;
Steps A 3, the subelement 412 of unpacking are unpacked into baseband I Q data with this Ir interface electric signals;
Steps A 4, said baseband I Q transfer of data to computer is tested through network interface.
Here, the processing of standard radio frequency signal source and computer has guaranteed independence and objectivity that the RRU receiver is tested.
Shown in Fig. 6 B, the signal flow graph when the BBU transmitter is tested, detailed process is following:
Step B1, Devices to test BBU handle the standard signal that is provided by the RNC simulator, obtain Ir interface light signal;
The Ir interface light signal that step B2, opto-electronic conversion subelement 422 will pass through after BBU handles converts the Ir interface electric signals to;
Step B3, the subelement 412 of unpacking are unpacked into baseband I Q data with this Ir interface electric signals;
Step B4, said baseband I Q transfer of data to computer is tested through network interface.
Here, the processing of RNC simulator and computer has guaranteed independence and objectivity that the BBU transmitter is tested.
Correspondingly, the embodiment of the invention also provides a kind of interface test method, and its flow process is as shown in Figure 7, and concrete steps are following:
Wherein, the standard base band data is provided by standard signal source.
Wherein, when Devices to test is RRU,, test through RF instrumentation through the output signal after the RRU processing; When Devices to test is BBU,, test through the RNC simulator through the output signal after the BBU processing.
Correspondingly, the embodiment of the invention provides another kind of interface test method, and its flow process is as shown in Figure 8, and concrete steps are following:
Wherein, when Devices to test was RRU, said RRU handled the standard signal that is provided by the standard radio frequency signal source, obtained Ir interface light signal; When Devices to test was BBU, said BBU handled the standard signal that is provided by standard RNC simulator, obtained Ir interface light signal.
Wherein, said base band data is tested through computer.
Correspondingly, the embodiment of the invention provides another interface test method, and its flow process is as shown in Figure 9, and concrete steps are following:
Wherein, when first Devices to test was RRU, second Devices to test was BBU; When first Devices to test was BBU, second Devices to test was RRU.
This method is emulation and the test process to the exceptional signaling flow process of Ir interface protocol, and concrete grammar repeats no more with aforementioned identical to what describe in the Ir interface test device here.
Through above-mentioned Ir interface test device and Ir interface test method, not only realized independent test to BBU or RRU, also realize emulation and test to the exceptional signaling flow process of the Ir interface protocol of complicacy.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (7)
1. an interface test device is characterized in that, comprises electric light/photoelectric conversion unit, packing unit and agreement monitoring and simulation unit, wherein:
Electric light/photoelectric conversion unit is used for converting the Ir interface light signal that receives from first Devices to test to the Ir interface electric signals;
The packing unit is used for said Ir interface electric signals is unpacked into base band data;
Agreement monitoring and simulation unit are used for monitoring the signaling bit of the Ir interface protocol that said base band data comprises, and the signaling bit of indicating said packing unit to change to be used to the appointment of simulating the exceptional signaling flow process;
The packing unit also is used for according to said indication, changes the signaling bit of the appointment be used to simulate the exceptional signaling flow process, and the base band data that will comprise the signaling bit after the change is packaged into the Ir interface electric signals;
Electric light/photoelectric conversion unit also is used for converting the Ir interface electric signals after the packing of said packing unit to be transferred to second Devices to test Ir interface light signal;
Opto-electronic conversion subelement in electric light/photoelectric conversion unit converts the Ir interface light signal of second Devices to test feedback to the Ir interface electric signals; The subelement of unpacking in the packing unit is unpacked into base band data with this Ir interface electric signals, and the Ir interface protocol signaling bit that comprises in this base band data after the agreement monitoring is unpacked to the subelement of unpacking with the monitoring subelement in the simulation unit is monitored; Perhaps, whether agreement monitoring has been made correct reaction with the monitoring subelement in the simulation unit to second Devices to test and has been carried out monitoring analysis.
2. interface test device as claimed in claim 1 is characterized in that, said packing unit also comprises packing subelement and emulation subelement:
The packing subelement is used for base band data is packaged into the Ir interface electric signals;
The emulation subelement is used for according to indication, changes the signaling bit of the appointment be used to simulate the exceptional signaling flow process;
The subelement of unpacking also is used for the Ir interface electric signals that electric light/photoelectric conversion unit will convert to from the Ir interface light signal that first Devices to test receives is unpacked into base band data.
3. interface test device as claimed in claim 1 is characterized in that, said electric light/photoelectric conversion unit also comprises electric light conversion subelement:
Electric light conversion subelement is used for converting the Ir interface electric signals after the packing of said packing unit to be transferred to second Devices to test Ir interface light signal;
The opto-electronic conversion subelement also is used for converting the Ir interface light signal that receives from first Devices to test to the Ir interface electric signals.
4. interface test device as claimed in claim 1 is characterized in that, said agreement monitoring also comprises the indication subelement with simulation unit:
The indication subelement is used to indicate said packing unit to change to be used to the signaling bit of the appointment of simulating the exceptional signaling flow process;
The monitoring subelement also is used for monitoring the signaling bit of the Ir interface protocol that base band data comprises.
5. an interface test method is characterized in that, comprising:
The Ir interface light signal that first Devices to test is sent converts the Ir interface electric signals to;
Ir interface electric signals after the said conversion is unpacked into base band data;
Monitor the signaling bit of the Ir interface protocol that comprises in the said base band data;
Send to change the indication information of the appointment signaling bit that is used to simulate the exceptional signaling flow process;
The base band data that will comprise the signaling bit after the change is packaged into the Ir interface electric signals;
Convert the Ir interface electric signals after the said packing to Ir interface light signal;
With Ir interface optical signal transmission to the second Devices to test after the said conversion; And
Response message to second Devices to test feedback is tested.
6. method as claimed in claim 5 is characterized in that, said first Devices to test is RRU, and said second Devices to test is BBU.
7. method as claimed in claim 5 is characterized in that, said first Devices to test is BBU, and said second Devices to test is RRU.
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| CN103297994B (en) * | 2012-02-27 | 2016-09-21 | 普天信息技术研究院有限公司 | A kind of method and apparatus of debugging radio frequency remote base station |
| CN102665237B (en) * | 2012-04-24 | 2014-09-10 | 北京邮电大学 | Simulative Ir interface protocol conformance testing device and interoperability testing method |
| CN103699017A (en) * | 2013-12-24 | 2014-04-02 | 中广核核电运营有限公司 | Simulation test system and simulation test method for interface equipment of simulator in nuclear power station |
| CN113691419B (en) * | 2021-08-26 | 2022-07-19 | 中信科移动通信技术股份有限公司 | Extension unit testing method and system |
| CN113890868A (en) * | 2021-09-23 | 2022-01-04 | 恒睿(重庆)人工智能技术研究院有限公司 | Signaling interaction simulation method and device and computer storage medium |
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| US20070177552A1 (en) * | 2005-01-12 | 2007-08-02 | Wangjun Wu | Distributed based station system and method for networking thereof and base band unit |
| CN101159933A (en) * | 2005-05-19 | 2008-04-09 | 华为技术有限公司 | Split type base station system and networking method and base band unit thereof |
| CN101183900A (en) * | 2007-11-23 | 2008-05-21 | 深圳国人通信有限公司 | Baseband extension radio frequency subsystem RRU testing method, system and analog BBU device |
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| US20070177552A1 (en) * | 2005-01-12 | 2007-08-02 | Wangjun Wu | Distributed based station system and method for networking thereof and base band unit |
| CN101159933A (en) * | 2005-05-19 | 2008-04-09 | 华为技术有限公司 | Split type base station system and networking method and base band unit thereof |
| CN101183900A (en) * | 2007-11-23 | 2008-05-21 | 深圳国人通信有限公司 | Baseband extension radio frequency subsystem RRU testing method, system and analog BBU device |
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