CN101562825A - Test method of uplink error rate of RRU equipment - Google Patents
Test method of uplink error rate of RRU equipment Download PDFInfo
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- CN101562825A CN101562825A CNA2009101469256A CN200910146925A CN101562825A CN 101562825 A CN101562825 A CN 101562825A CN A2009101469256 A CNA2009101469256 A CN A2009101469256A CN 200910146925 A CN200910146925 A CN 200910146925A CN 101562825 A CN101562825 A CN 101562825A
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Abstract
The invention relates to a test method of the uplink error rate of a remote radio unit (RRU) equipment, which is applicable to the formats in the 3G technology such as TD-SCDMA, WCDMA and CDMA2000 and characterized in that a certain bit stream is modulated into a BBU baseband output signal by software according to the requirements for a test signal in a 3GPP test standard to generate a text that can be identified by a signal source, the text is implanted into the signal source to output the radio signal of a required frequency band, the text is sampled as a baseband chip text by the RRU equipment, the obtained baseband chip text is modulated by a demodulation program compiled by the software to obtain a bit stream, the bit stream is compared with the emitted bit stream to obtain an error number, and finally the error rate of the RRU is obtained by a certain number of statistics. The method solves the problem that RRU manufacturers can test the uplink error rate index without the cooperation of BBU manufacturers, thus greatly reducing test cost and saving test time.
Description
Technical field
The present invention relates to a kind of measuring technology in a kind of 3G communication equipment, be specifically related to the method for testing of RRU equipment uplink error rate.
Background technology
Radio frequency remote unit RRU (Radio Remote Unit) technical characterstic is that the base station is divided into the near-end machine is that radio base band control (BBU) and remote termination are that radio frequency zooms out (RRU) two parts, connect by optical fiber between the two, its interface is based on open C PRI interface, can stably be connected with mainstream vendor's equipment.BBU can be installed in suitable machine room position, and RRU is installed in antenna end, and a BBU can connect several RRU, has both saved the space, and is low for base station machine room addressing requirement, adopts existing feeder window and chute, can reduce the networking cost, improves networking efficient.
For RRU producer, the radio-frequency (RF) index that relates to error rate requirement is a lot, and the test of these indexs must cooperate test with BBU producer.This has not only increased difficulty of test, and expends the joint test time, improves testing cost.
Summary of the invention
The object of the invention is to provide a kind of method of carrying out the uplink error rate test at the 3G radio frequency remote unit RRU.Idiographic flow is: utilize common software to produce one group of bit stream, carry out baseband modulation, generated code sheet stream file by 3G communication standard (TD-SCDMA, WCDMA, CDMA2000) physical layer modulation demodulation standard.The mode of stream of chips file, generate data source file, in the write signal source by the requirement of signal source base band data.Signal source is arranged to the arbitrary signal emergence pattern, and chip-rate and filtering characteristic that baseband signal is stipulated by physical layer standard are modulated into radiofrequency signal.Be input to the radio frequency mouth of RRU through signal source radio frequency mouth.To digital baseband signal, CPU reads a long segment base band signal, deposits output data file in through the RRU radio demodulating.PC utilizes serial ports or network interface sense data, and error rate test software carries out a series of demodulation to baseband signal by physical layer standard, obtains the bit stream file at last.The bit stream file of bit stream file that obtains and input is compared, just can obtain number of bit errors.Through repeatedly adding up in a large number, can obtain the error rate of calling hierarchy.
A kind of method of carrying out the uplink error rate test at the 3G radio frequency remote unit RRU of the present invention, comprise: utilize common software to produce one group of bit stream, carry out baseband coding modulation scrambling spread spectrum framing by 3G communication standard physical layer standard and handle, generate the base band data file; The form of base band data file by the requirement of signal source base band data, generate the signal source file, be written in the 3G signal source; Signal source is set to the arbitrary signal emergence pattern, by 3G standard chip-rate and formed filter is set, and baseband signal is modulated into the radiofrequency signal of the frequency range that requires, and outputs to attenuator through signal source radio frequency mouth, is input to the radio frequency mouth of RRU again; Through a series of processing of RRU receiver, radiofrequency signal is separated and is transferred to digital baseband signal, and the CPU in the automatic receiver control of RRU upper layer software (applications) reads a piece of digital baseband signal, is deposited in the output data file of assigned catalogue; Error rate test software read data files is also calculated the error rate.
The present invention is method as mentioned above, wherein, error rate test software carries out symbol synchronization, phase place compensate of frequency deviation, descrambling and de-spreading demodulation, demultiplexing decoding to digital baseband signal by physical layer standard, obtain the bit stream file, the bit stream file of bit stream file that obtains and input is compared, obtain number of bit errors,, obtain the error rate through repeatedly adding up in a large number.
The present invention is method as mentioned above, and wherein, the 3G communication standard is TD-SCDMA, or is WCDMA, or is CDMA2000.
The present invention is method as mentioned above, wherein, the corresponding function module of error rate test software is made executable API interface, by clicking the error rate calculation button, calculates the error rate.
The present invention is method as mentioned above, and wherein, read data files is that PC utilizes serial ports or network interface to read.
Advantage of the present invention: having solved RRU manufacturer does not need BBU manufacturer to cooperate the problem that yet can carry out the uplink error rate index test, and test operation is succinctly convenient, greatly reduces testing cost and testing time.
Description of drawings
Fig. 1 is test link figure of the present invention;
Fig. 2 is the error rate test software flow pattern;
Fig. 3 is a RRU error rate test conceptual scheme.
Embodiment
The invention provides a kind of method of carrying out the uplink error rate test at the 3G Remote Radio Unit.
This method of testing comprises process as shown in Figure 1.Generate the base band data file by random bit by the physical layer modulation process, the Text Mode generation data source file of base band data file according to signal source.Data source file is write 3G signal source (as Agilent ESG4438C), signal source is arranged to the arbitrary signal emergence pattern, chip-rate and pulse-shaping filter are pressed the setting of 3GPP standard, signal source is exported the radiofrequency signal of required frequency range, radiofrequency signal enters RRU equipment to be tested, RRU equipment receiver link becomes base band to radiofrequency signal and receives data, and it is bit through software demodulation that base band receives data, relatively obtains the error code bit number by the bit and the former emission bit of demodulation.
Utilize common software to produce one group of bit stream, carry out baseband coding modulation scrambling spread spectrum framing by 3G communication standard (TD-SCDMA, WCDMA, CDMA2000) physical layer standard and handle, generate the baseband chip file.The form of baseband chip file by the requirement of signal source base band data, generate the signal source file, be written in the signal source.Signal source is set to the arbitrary signal emergence pattern, and (TD-SCDMA, WCDMA, CDMA2000) is provided with chip-rate and formed filter by 3G standard, baseband signal is modulated into the radiofrequency signal of the frequency range that requires.Output to attenuator through signal source radio frequency mouth, be input to the radio frequency mouth of RRU again.Through a series of processing of RRU receiver, radiofrequency signal is separated and is transferred to digital baseband signal, and the CPU in the automatic receiver control of RRU upper layer software (applications) reads a piece of digital baseband signal, is deposited in the output data file of assigned catalogue.Calculate the error rate by error rate test software read data files.The error rate test software function comprises: digital baseband signal is carried out symbol synchronization, phase place compensate of frequency deviation, descrambling and de-spreading demodulation, demultiplexing decoding by physical layer standard, obtain the bit stream file, the bit stream file of bit stream file that obtains and input is compared, just can obtain number of bit errors, through repeatedly adding up in a large number, can obtain the error rate.Error rate test software above-mentioned functions module is made executable API interface, only need the error rate calculation button in the some software, just can obtain the error rate automatically.
As shown in Figure 2, error rate test software comprises following functional module: reading of data, symbol synchronization, phase compensation, descrambling and de-spreading demodulation, demultiplexing and decoding, bit stream file process, error rate calculation.The inventive method can be tested all and the relevant radio-frequency (RF) index of error rate requirement in the NodeB equipment, is suitable for all 3G standard standards.
As shown in Figure 3, be error rate test scheme device connection diagram, utilize 3G signal source and AWGN signal source to be coupled as one road signal and enter RRU that RRU passes to PC to base band data and analyzes the error rate.
The above only is a preferred embodiments of the present invention, and the interest field that the present invention advocated is not limited thereto.The present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those skilled in the art work as can make various corresponding changes and distortion according to the present invention, but these changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (5)
1, a kind of method of carrying out the uplink error rate test at the 3G radio frequency remote unit RRU is characterized in that this method comprises:
Utilize common software to produce one group of bit stream, carry out baseband coding modulation scrambling spread spectrum framing by 3G communication standard physical layer standard and handle, generate the base band data file;
The form of base band data file by the requirement of signal source base band data, generate the signal source file, be written in the 3G signal source;
Signal source is set to the arbitrary signal emergence pattern, by 3G standard chip-rate and formed filter is set, and baseband signal is modulated into the radiofrequency signal of the frequency range that requires, and outputs to attenuator through signal source radio frequency mouth, is input to the radio frequency mouth of RRU again;
Through a series of processing of RRU receiver, radiofrequency signal is separated and is transferred to digital baseband signal, and the CPU in the automatic receiver control of RRU upper layer software (applications) reads a piece of digital baseband signal, is deposited in the output data file of assigned catalogue;
Error rate test software read data files is also calculated the error rate.
2, method according to claim 1, it is characterized in that, error rate test software carries out symbol synchronization, phase place compensate of frequency deviation, descrambling and de-spreading demodulation, demultiplexing decoding to digital baseband signal by physical layer standard, obtain the bit stream file, the bit stream file of bit stream file that obtains and input is compared, obtain number of bit errors,, obtain the error rate through repeatedly adding up in a large number.
3, method according to claim 1 and 2 is characterized in that, the 3G communication standard is TD-SCDMA, or is WCDMA, or is CDMA2000.
4, method according to claim 1 and 2 is made executable API interface with the corresponding function module of error rate test software, by clicking the error rate calculation button, calculates the error rate.
5, method according to claim 1 and 2 is characterized in that, read data files is that PC utilizes serial ports or network interface to read.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101469256A CN101562825B (en) | 2009-06-08 | 2009-06-08 | Test method of uplink error rate of RRU equipment |
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| CN2009101469256A CN101562825B (en) | 2009-06-08 | 2009-06-08 | Test method of uplink error rate of RRU equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098698A (en) * | 2010-12-02 | 2011-06-15 | 上海电机学院 | Method and system for testing error rate |
| CN103369575A (en) * | 2012-03-31 | 2013-10-23 | 中国移动通信集团公司 | Method and device for determining limited channel |
| CN110120856A (en) * | 2019-04-29 | 2019-08-13 | 西安微电子技术研究所 | The test vector generation and detection system and method for a kind of polymorphic type cycle tests |
| CN112312422A (en) * | 2019-07-29 | 2021-02-02 | 中兴通讯股份有限公司 | Method and device for acquiring uplink bit error rate of remote radio unit |
-
2009
- 2009-06-08 CN CN2009101469256A patent/CN101562825B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098698A (en) * | 2010-12-02 | 2011-06-15 | 上海电机学院 | Method and system for testing error rate |
| CN103369575A (en) * | 2012-03-31 | 2013-10-23 | 中国移动通信集团公司 | Method and device for determining limited channel |
| CN103369575B (en) * | 2012-03-31 | 2016-05-25 | 中国移动通信集团公司 | A kind of determination methods of limited channel and device |
| CN110120856A (en) * | 2019-04-29 | 2019-08-13 | 西安微电子技术研究所 | The test vector generation and detection system and method for a kind of polymorphic type cycle tests |
| CN112312422A (en) * | 2019-07-29 | 2021-02-02 | 中兴通讯股份有限公司 | Method and device for acquiring uplink bit error rate of remote radio unit |
| WO2021018056A1 (en) * | 2019-07-29 | 2021-02-04 | 中兴通讯股份有限公司 | Method and apparatus for acquiring uplink bit error rate of radio remote unit |
| EP4007343A4 (en) * | 2019-07-29 | 2022-10-12 | ZTE Corporation | Method and apparatus for acquiring uplink bit error rate of radio remote unit |
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| CN101562825B (en) | 2011-04-20 |
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Address after: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee after: CITIC Mobile Communication Technology Co.,Ltd. Address before: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee before: CITIC Mobile Communication Technology Co., Ltd |
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