CN103200587A - Automatic stability test device and method in radio frequency far-end unit - Google Patents
Automatic stability test device and method in radio frequency far-end unit Download PDFInfo
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Abstract
Provided is an automatic stability test device and a method in a radio frequency far-end unit. The automatic stability test device comprises an RRU complete machine to be tested, a base band data transceiver, an auxiliary testing single disc, a stability test platform based on the matlab and an n- one power divider. The auxiliary testing single disc is used for converting base band data into radio-frequency signals and converting the radio-frequency signals into the base band data. The stability test platform is used for finishing all stability operation of control, data analysis and device reboot on the matlab. The n- one power divider is used for combining multi-channel down links and up links of the RRU complete machine to be tested into one and transmitting the multi-channel down links and the up links of the RRU complete machine to be tested to corresponding up links and down links of the auxiliary testing single disc. The automatic stability test device is strong in generality, architecture implementation is simple, resources are reduced and cost is low. The RRU complete machine to be tested is regarded as a black box completely, original functions of the RRU complete machine to be tested do not need to be modified additionally for matching a stability test, the stability test platform is completely based on the RRU complete machine to be tested, and instruments such as a spectrometer and a signal source are not needed for finishing the stability test.
Description
Technical field
The present invention relates to communication technical field, especially relate to a kind of device and method of the realization of automation stability test in the RF remote unit system.
Background technology
Existing LTE (Long Term Evolution, Long Term Evolution) E-NodeB(Evolved NodeB, the B node of evolution) distributed frames that adopt more, the distributed type base station technology characteristics refer to the BBU(Base Band Unit of base station, base station processing unit) and RRU(Remote Radio Unit, a kind of base station mode placed apart and that link to each other by optical fiber as module independently separately Remote Radio Unit).The radio-frequency channel of RRU has comprised transmission channel and receive path.According to actual networking and application scenarios, the RRU port number can be 1,2,4,8.Wherein, RRU mainly realizes the transceiver of radio frequency, and function such as power amplifier.In actual use, in order to guarantee the stability of system, need to the RRU complete machine carry out stability test and by after can dispatch from the factory.Stability test is exactly before product puts into operation, to the final reexamination of software requirement analysis, design specification book and coding, is the shutdown procedures of product software quality.Its definition simply overview is: the process of working procedure in order to find mistake.Along with the continuous expansion of software size, the software quality problem of product has become one of principal element of its development of restriction.As the means that guarantee product quality and reliability, the stability test of software plays irreplaceable effect.
Multichannel RRU carries out the radio frequency automation stability test target of each major company's pursuit of industry just.At present, some companies have also developed automatic test control software that can be commercial, and special stability has been to judge the key factor of a product quality.In manual test, the time of stability test and frequency number of times are controlled by the tester, restart such as equipment, restart by hand and often just can only accomplish several times to tens times, seldom reach up to a hundred times test scale, be prone to the situation of testing insufficient strength and causing the fault leak.At above problem, need to consider the platform of a kind of stability test of design, be aided with corresponding testing apparatus and method of testing, can be so that testing efficiency be higher, manual test again, and the functional block that can will test according to the flexible setting of testing requirement, the time of each functional block test and number of times also need predeterminable putting, and whole test full-automation is finished, and complete test log are arranged for inquiry and analysis, thereby can greatly alleviate the workload of test, increase work efficiency.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of stability test platform and method of testing, realizes the stability test of access device.By this test platform and stability approach, can need not manual intervention, flexible and convenient finish multichannel RRU system test, realize complete and high-intensity stability test.
Technical scheme of the present invention is automation stability test device in a kind of RF remote unit, comprise for the anolog base station processing unit and issue and receive the base band data transceiver of base band data, RRU complete machine to be measured, be used for changing base band data into radiofrequency signal and radiofrequency signal transferred to the subtest single-deck of base band data, and for the PC that provides based on the stability test platform of matlab
The base band data transceiver is provided with light mouth 0,1, and RRU complete machine to be measured is connected with the light mouth 0 of base band data transceiver through optical fiber, and the subtest single-deck is connected with the light mouth 1 of base band data transceiver through optical fiber;
If RRU complete machine to be measured has N passage, N is set divides one power splitter, described N divides one power splitter that the down link synthetic a tunnel of N the passage of RRU to be measured is delivered to the uplink path of subtest single-deck correspondence, and the up link of N the passage of RRU to be measured is synthesized one tunnel downlink path of delivering to subtest single-deck correspondence;
Adopt serial ports to set up between PC and base band data transceiver, RRU complete machine to be measured, the subtest single-deck respectively and be used for communicating to connect of transferring command, adopt network interface to set up between PC and the base band data transceiver and be used for communicating to connect of Data transmission.
The present invention also further provides and adopts the method for testing that the automation stability test device is realized in the above-mentioned RF remote unit, may further comprise the steps,
Step 2 is carried out down link DL test and up link UL test,
Described down link DL test process is, after the baseband signal that the base band data transceiver produces is issued to RRU complete machine to be measured, divide one power splitter from the down link transmission respective radio-frequency data of each passage of RRU complete machine to be measured to N successively, the road radiofrequency signal synthetic by power splitter is dealt in the uplink path of subtest single-deck; The subtest single-deck transfers synthetic radiofrequency signal to baseband signal, receives and the collection corresponding data from the subtest single-deck by the base band data transceiver then, is saved in PC and treats subsequent treatment;
Described up link UL test process is, after the subtest single-deck will transfer radiofrequency signal to from the baseband signal that the base band data transceiver is uploaded, the gained radiofrequency signal sends to N from the downlink path of subtest single-deck and divides one power splitter, is dealt into the up link of N passage of RRU complete machine to be measured simultaneously by power splitter; Receive and gather the corresponding data of the radiofrequency signal that up link is uploaded of each passage from RRU complete machine to be measured successively by the base band data transceiver, be saved in PC and treat subsequent treatment;
Step 3 is analyzed data, comprises that step 2 is tested the data of gained N passage respectively at down link DL test and up link UL carries out analysis on time domain and the frequency domain;
Step 4 is carried out horizontal analysis, comprises the difference between the comparison N passage, comprises the comparison of the analysis result on time domain and the frequency domain;
Step 5, if i=1, make i=i+1 and return step 2, if vertical analysis item is carried out in i ≠ 1, comprise the analysis result of more same passage on a current and preceding gained time domain, threshold value by comparative analysis result and setting, if not in threshold range then RRU complete machine to be measured keeps present status for the subsequent analysis abnormal cause, if in threshold range then analyze successfully, continue to judge whether i reaches default number of repetition, do not reach and then return step 2, reach then to make j=j+1 restart RRU complete machine to be measured and return step 2 and reach the default number of times of restarting up to j.
The present invention has highly versatile, framework is realized simple, the device that resource is few, cost is low, and fully RRU to be measured is used as black box, need not test the original function of additional modifications RRU to be measured for fitment stability, be based on the stability test platform of RRU complete machine to be measured fully, and do not need instrument such as frequency spectrograph and signal source just can finish stability test.
Description of drawings
Fig. 1 is the realization block diagram of the RRU automation stability test device of the embodiment of the invention.
Fig. 2 is the test flow chart of the embodiment of the invention.
Fig. 3 is that base band sources sends in radio frames and the schematic diagram of receiving position in the embodiment of the invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Device of the present invention as shown in Figure 1, mainly is made of following components: the base band data transceiver, be used for the base band data (being provided with serial ports 1 and network interface, light mouth 0, light mouth 1) that analog BBU issues and receives, and can adopt existing techniques in realizing; RRU complete machine to be measured, i.e. the main body multichannel RRU whole set equipment (being provided with serial ports 2) of stability test; Subtest single-deck (being provided with serial ports 3) is used for base band data is changed into radiofrequency signal and transfers radiofrequency signal to base band data, for the data loopback test, can adopt existing techniques in realizing; Based on the stability test platform of matlab, general by the realization of matlab software is installed at a PC, finish the stability operation that all controls and data analysis and equipment are restarted at matlab software; Optical fiber, be used for connecting base band data transceiver and RRU complete machine to be measured and subtest single-deck, RRU complete machine to be measured (comprises an optical fiber that is used for receipts through optical fiber, article one, for the optical fiber of sending out) be connected with the light mouth 0 of base band data transceiver, the subtest single-deck is connected with the light mouth 1 of base band data transceiver through optical fiber (comprise an optical fiber that is used for receipts, one for the optical fiber of sending out); N divides one power splitter, power splitter can adopt the product on the market, wherein N is generally 1,2,4 or 8, be used for the down link synthetic a tunnel of N the passage of RRU to be measured is connected the uplink path of subtest single-deck correspondence, and the downlink path of the up link of N the passage of RRU to be measured being synthesized one tunnel connection subtest single-deck correspondence; Serial Port Line and netting twine, be respectively applied to PC and each equipment by serial ports 1,2,3 and network interface between communicate by letter.PC can transmit control command to base band data transceiver, RRU complete machine to be measured, subtest single-deck respectively by serial ports 1,2,3, by network interface with FTP mode and base band data transceiver Data transmission.Serial ports generally adopts the RS232 chip.
The present invention is based on the flow chart of the key step of the above device method of testing that adopts, as shown in Figure 2:
Beginning configuration testing environment, start base band data transceiver and subtest single-deck, start RRU complete machine to be measured then, the base band sources that wherein issues is stronger by one group of autocorrelation, the more weak sequence of cross correlation forms by molding filtration through OFDM (orthogonal frequency division multiplexi) modulation, sends and receives in the special subframe of the subframe 1 of 10ms radio frames.
Carry out downlink test and uplink test then respectively.
The data flow of downlink data link test is:
(1) one group of (N) baseband signal producing of base band data transceiver from light mouth 0 after optical fiber is issued to RRU complete machine to be measured, successively from down link DL0, the DL1 of each passage of RRU complete machine to be measured ... DLN-1 sends descending respective radio-frequency data and divides one power splitter to N.PC, can be controlled the down link of certain passage of RRU complete machine to be measured and open to RRU complete machine to be measured by serial ports 2 input related commands, and the down link of other passages is closed, and divides to N in one the power splitter thereby the down link by this passage sends radiofrequency signal.
(2) after the radiofrequency signal that sends from the down link from N passage of RRU complete machine to be measured successively all arrives power splitter, by synthetic one tunnel radiofrequency signal of power splitter, be dealt among the uplink path UL of subtest single-deck.To the subtest single-deck, the uplink path UL that can control the subtest single-deck opens to receive the rf data that RRU complete machine to be measured transmits to PC from N divides one power splitter by serial ports 3 input related commands.
(3) the subtest single-deck transfers synthetic radiofrequency signal to baseband signal, receives and gather corresponding data then by the base band data transceiver.The concrete implementation procedure of gathering comprises, subtest single-deck conversion gained baseband signal passes in the base band data transceiver by optical fiber and by light mouth 1, corresponding baseband signal data are delivered to PC by network interface from the base band data transceiver, and data save as the .dat file for subsequent analysis at PC.PC to base band data transceiver input related command, can be controlled the baseband signal transmitting-receiving of base band data transceiver by serial ports 1.
The data flow of up data link test is:
(1) the subtest single-deck will be from the light mouth 1 of base band data transceiver after the baseband signal that optical fiber is uploaded transfers radiofrequency signal to, and the gained radiofrequency signal sends to N from the downlink path DL of subtest single-deck and divides one the power splitter.To the subtest single-deck, the downlink path DL that can control the subtest single-deck opens to send radiofrequency signal and divides one power splitter to N PC by serial ports 3 input related commands.
(2) radiofrequency signal of subtest single-deck transmission is dealt into up link UL0, the UL1 of N passage of RRU complete machine to be measured by power splitter ... among the ULN-1, wherein can import related commands to RRU complete machine to be measured by serial ports 2 by PC, the up link of opening N passage of RRU complete machine to be measured simultaneously receives N and divides the radiofrequency signal data that transmit from the subtest single-deck in the power splitter.
(3) receive and gather the corresponding baseband signal data of the radiofrequency signal that up link is uploaded of each passage successively from RRU complete machine to be measured by the base band data transceiver.Concrete corresponding baseband signal data implementation procedure of gathering certain passage of RRU complete machine to be measured comprises, the corresponding baseband signal data of this passage pass to the base band data transceiver by optical fiber and by light mouth 0 from RRU complete machine to be measured, be delivered to PC by network interface from the base band data transceiver then, data save as the .dat file for subsequent analysis at PC.PC to base band data transceiver input related command, can be controlled the baseband signal transmitting-receiving of base band data transceiver by serial ports 1.
At last the The data of preserving is analyzed based on the stability test platform of matlab, finish the stability operation that all controls and data analysis and equipment are restarted at matlab software, the analysis data are that data (data that respectively relate to N passage of RRU complete machine to be measured) in the up link of PC preservation or the down link are carried out the analysis on time domain and the frequency domain, according to analysis result, by comparing to determine the threshold value of setting, if in threshold range then analyze successfully, carry out the automation stability test by repeatedly restarting RRU to be measured so, and figure and corresponding type information after the corresponding preservation analysis data supply analysis.Wherein can in once restarting, have and carry out reboot operation again after repeatedly analyzing successfully.Flow process can be designed to, the discriminatory analysis result whether in the threshold range after, if otherwise RRU complete machine to be measured keeps present status for the subsequent analysis abnormal cause, if then continue to judge whether the number of repetition that reaches default, do not reach then to return and start RRU complete machine to be measured cycle analysis again, preservation final result and relevant type information when reaching.
For the sake of ease of implementation, provide the idiographic flow of embodiment as follows:
Base band sources sends in radio frames and the schematic diagram of receiving position among the embodiment, as shown in Figure 3, the 10ms radio frames is made up of 10 subframes, comprises subframe 0, subframe 1, subframe 2, subframe 3, subframe 4, subframe 5, subframe 6, subframe 7, son 8, subframe 9.Wherein first subframe is special subframe, is GP protection time slot in the middle of down pilot tone and last pilot tone, places the up-downgoing base band sources here, and in corresponding up link the receiving baseband signal source.The symbol that relates among the figure is this area Essential Terms, as DwPTS descending pilot frequency, UpPTS ascending pilot frequency, DL SIG downgoing baseband signal source, UL SIG uplink baseband signal source, RX SIG receiving baseband signal source, GP protection time slot, Time time; Descending frame head and up frame head all are to be the benchmark up-downgoing frame head that time-delay forms on the fixing plate of UL Time of having delayed time with same (PP2S) frame head.
Step 2 is carried out down link DL test and up link UL test,
Described down link DL test process is, after the baseband signal that the base band data transceiver produces is issued to RRU complete machine to be measured, divide one power splitter from the down link transmission respective radio-frequency data of each passage of RRU complete machine to be measured to N successively, the road radiofrequency signal synthetic by power splitter is dealt in the uplink path of subtest single-deck; The subtest single-deck transfers synthetic radiofrequency signal to baseband signal, receives and the collection corresponding data from the subtest single-deck by the base band data transceiver then, is saved in PC and treats subsequent treatment;
Described up link UL test process is, after the subtest single-deck will transfer radiofrequency signal to from the baseband signal that the base band data transceiver is uploaded, the gained radiofrequency signal sends to N from the downlink path of subtest single-deck and divides one power splitter, is dealt into the up link of N passage of RRU complete machine to be measured simultaneously by power splitter; Receive and gather the corresponding data of the radiofrequency signal that up link is uploaded of each passage from RRU complete machine to be measured successively by the base band data transceiver, be saved in PC and treat subsequent treatment.
Step 3 is analyzed data, comprises that step 2 is tested the data of gained N passage respectively at down link DL test and up link UL carries out analysis on time domain and the frequency domain.
When the data of N passage collection of RRU complete machine to be measured were carried out analysis on time domain and the frequency domain, wherein time domain analysis was to carry out time delay by the search of relevant peaks, the analysis of amplitude and phase place; Frequency-domain analysis is to carry out the analysis of amplitude and phase place by FFT transform analysis subcarrier.
Step 4 is carried out horizontal analysis, comprises the difference between the comparison N passage, comprises the comparison of the analysis result on time domain and the frequency domain.
Step 5, if i=1, make i=i+1 and return step 2, if vertical analysis item is carried out in i ≠ 1, comprise the analysis result of more same passage on a current and preceding gained time domain, threshold value by comparative analysis result and setting, if not in threshold range then RRU complete machine to be measured keeps present status for the subsequent analysis abnormal cause, if in threshold range then analyze successfully, continue to judge whether i reaches default number of repetition, do not reach and then return step 2, reach then to make j=j+1, restart RRU complete machine to be measured and return step 2 and reach the default number of times of restarting up to j.By repeating 2 ~ 5, just can finish the realization of RRU system internal stability test in real time automatically.Threshold value can according to circumstances be set voluntarily by those skilled in the art.
The judgment mechanism of embodiment is to come analysis and judgement by horizontal and vertical mode respectively, and wherein horizontal analysis is the difference between N passage in the RRU complete machine more to be measured, can comprise the time delay on time domain and the frequency domain, the comparison of amplitude and phase place; Vertical analysis is the temporal analysis (comprising on time domain and the frequency domain) of same passage different number of times in front and back in the RRU complete machine more to be measured.By comparing to determine the threshold value of setting, for example relatively before and after twice difference whether in the threshold range, if in threshold range then analyze successfully, carry out the automation stability test by repeatedly restarting RRU to be measured so, and figure and corresponding type information after the corresponding preservation analysis data supply analysis.Wherein can in once restarting, have and carry out reboot operation again after repeatedly analyzing successfully.
Specific embodiment described herein only is that the present invention's spirit is illustrated.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (2)
1. automation stability test device in the RF remote unit, it is characterized in that: comprise for the anolog base station processing unit issuing and receiving the base band data transceiver of base band data, RRU complete machine to be measured, be used for changing base band data into radiofrequency signal and radiofrequency signal transferred to the subtest single-deck of base band data, and for the PC that provides based on the stability test platform of matlab
The base band data transceiver is provided with light mouth 0,1, and RRU complete machine to be measured is connected with the light mouth 0 of base band data transceiver through optical fiber, and the subtest single-deck is connected with the light mouth 1 of base band data transceiver through optical fiber;
If RRU complete machine to be measured has N passage, N is set divides one power splitter, described N divides one power splitter that the down link synthetic a tunnel of N the passage of RRU to be measured is delivered to the uplink path of subtest single-deck correspondence, and the up link of N the passage of RRU to be measured is synthesized one tunnel downlink path of delivering to subtest single-deck correspondence;
Adopt serial ports to set up between PC and base band data transceiver, RRU complete machine to be measured, the subtest single-deck respectively and be used for communicating to connect of transferring command, adopt network interface to set up between PC and the base band data transceiver and be used for communicating to connect of Data transmission.
2. one kind is adopted the method for testing that the automation stability test device is realized in the described RF remote unit of claim 1, it is characterized in that: may further comprise the steps,
Step 1, the base band data transceiver produces baseband signal, baseband signal is stronger by one group of autocorrelation, the more weak sequence of cross correlation forms by molding filtration through the modulation of OFDM OFDM, the position that baseband signal sends and receives is in the special subframe GP of the subframe 1 of 10ms radio frames protection time slot, if i=1, j=1;
Step 2 is carried out down link DL test and up link UL test,
Described down link DL test process is, after the baseband signal that the base band data transceiver produces is issued to RRU complete machine to be measured, divide one power splitter from the down link transmission respective radio-frequency data of each passage of RRU complete machine to be measured to N successively, the road radiofrequency signal synthetic by power splitter is dealt in the uplink path of subtest single-deck; The subtest single-deck transfers synthetic radiofrequency signal to baseband signal, receives and the collection corresponding data from the subtest single-deck by the base band data transceiver then, is saved in PC and treats subsequent treatment;
Described up link UL test process is, after the subtest single-deck will transfer radiofrequency signal to from the baseband signal that the base band data transceiver is uploaded, the gained radiofrequency signal sends to N from the downlink path of subtest single-deck and divides one power splitter, is dealt into the up link of N passage of RRU complete machine to be measured simultaneously by power splitter; Receive and gather the corresponding data of the radiofrequency signal that up link is uploaded of each passage from RRU complete machine to be measured successively by the base band data transceiver, be saved in PC and treat subsequent treatment;
Step 3 is analyzed data, comprises that step 2 is tested the data of gained N passage respectively at down link DL test and up link UL carries out analysis on time domain and the frequency domain;
Step 4 is carried out horizontal analysis, comprises the difference between the comparison N passage, comprises the comparison of the analysis result on time domain and the frequency domain;
Step 5, if i=1, make i=i+1 and return step 2, if vertical analysis item is carried out in i ≠ 1, comprise the analysis result of more same passage on a current and preceding gained time domain, threshold value by comparative analysis result and setting, if not in threshold range then RRU complete machine to be measured keeps present status for the subsequent analysis abnormal cause, if in threshold range then analyze successfully, continue to judge whether i reaches default number of repetition, do not reach and then return step 2, reach then to make j=j+1 restart RRU complete machine to be measured and return step 2 and reach the default number of times of restarting up to j.
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| CN112770336A (en) * | 2019-10-21 | 2021-05-07 | 中移(成都)信息通信科技有限公司 | Equipment testing method and system |
| CN113572543A (en) * | 2021-07-19 | 2021-10-29 | 深圳市国电科技通信有限公司 | Apparatus for testing performance of communication transmitter |
| CN113572543B (en) * | 2021-07-19 | 2023-10-10 | 深圳市国电科技通信有限公司 | Apparatus for testing performance of communication transmitter |
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