CN110536333B - Method and system for testing base station radio remote unit - Google Patents
Method and system for testing base station radio remote unit Download PDFInfo
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- CN110536333B CN110536333B CN201810521116.8A CN201810521116A CN110536333B CN 110536333 B CN110536333 B CN 110536333B CN 201810521116 A CN201810521116 A CN 201810521116A CN 110536333 B CN110536333 B CN 110536333B
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Abstract
The application discloses a method for testing a base station remote radio unit, which comprises the following steps: a. carrying out test initialization according to the type of a radio frequency test case to be executed, wherein the type comprises an uplink index test and a downlink index test; b. selecting a first test channel of the RRU as a current channel to be tested by using a switching box; c. calling a corresponding test instrument according to the type of the radio frequency test case; d. performing radio frequency index test on the current channel to be tested according to the radio frequency test case by using the test instrument; e. and d, if the radio frequency test case has the untested test channel, selecting the next test channel of the current tested channel by using the switching box as the current tested channel, and executing the step d, otherwise, generating a test report according to the test results of all the test channels. By adopting the invention, the RRU testing efficiency can be improved, and the automation of RRU testing of a plurality of channels can be realized.
Description
Technical Field
The present invention relates to mobile communication technologies, and in particular, to a method and a system for testing a Radio Remote Unit (RRU) of a base station.
Background
The structure of an existing base station (E-NodeB) of Long Term Evolution (LTE) mostly adopts a distributed structure. The distributed Base station refers to a Base Band Unit (BBU) and a Remote Radio Unit (RRU) of a Base station, which are separately placed as independent modules and connected through an optical module-optical fiber. The BBU completes information interaction between the NodeB and the core network, and the functions comprise providing a physical interface for communicating with the core network, providing a CPRI/IR interface for communicating with the RRU, completing uplink and downlink data processing functions, providing a system clock and the like. The RRU mainly implements the transceiver function of radio frequencies. The receiver receives radio frequency information through the antenna feeder, and sends the received signal to the BBU after down-conversion to an intermediate frequency signal, amplification processing, analog-to-digital conversion, digital down-conversion, a matched filter and DAGC; the transmitter performs shaping filtering, digital-to-analog conversion and radio frequency signal up-conversion on downlink baseband data transmitted by the BBU and then reaches a transmitting frequency band for processing. The RRU may provide a multiplexing function of a radio frequency channel for receiving and transmitting signals, may share one antenna channel for the receiving signal and the transmitting signal, and may provide a filtering function for the receiving signal and the transmitting signal.
In the LTE network building process, base station testing is one of the main works, and RRU radio frequency indexes (including reference sensitivity, transmission power, modulation vector amplitude error, occupied channel bandwidth, adjacent channel leakage ratio, spurious signals, and the like) not only affect the performance of the base station itself, but also greatly affect the transceiving of other nearby base stations.
At present, the RRU test mode of the LTE base station comprises manual test and automatic test. The manual testing method is long in testing period, strong in testing subjectivity and not beneficial to verification and generation testing of products. Automated testing can solve the above problems, but current automated testing cannot achieve true automation.
In the existing automatic test scheme, a signal source and a spectrometer used in an automatic index test are connected to one channel of an RRU through a circulator, a PC end tool simulates signal generation and controls the signal source and the spectrometer to complete the test of one channel, and if all channels are covered, the radio frequency wire needs to be manually reconnected and retested after each channel is tested. Because the RRU channel needs to be manually replaced, automation in the true sense cannot be realized.
In addition, when testing a channel, the existing automatic test scheme uses test software to simulate operations such as cell link establishment and the like, and starts a radio frequency test if the operations are successful. The test mode only realizes the automatic control of the instrument, the test can be carried out when the setting of the base station meets the conditions, if the test conditions are not met, the tester needs to reset the base station to test after the test conditions are met, and therefore the test automation in the true sense can not be realized.
Disclosure of Invention
In view of this, the main objective of the present invention is to provide a method and a system for testing a base station remote radio unit, which can realize the automation of testing a plurality of channels of RRUs, thereby improving the RRU testing efficiency.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a method for testing a base station remote radio unit comprises the following steps:
a. carrying out test initialization according to the type of a radio frequency test case to be executed, wherein the type comprises an uplink index test and a downlink index test;
b. selecting a first test channel of a Radio Remote Unit (RRU) as a current channel to be tested by using a switching box;
c. calling a corresponding test instrument according to the type of the radio frequency test case;
d. performing radio frequency index test on the current channel to be tested according to the radio frequency test case by using the test instrument;
e. and d, if the radio frequency test case has the untested test channel, selecting the next test channel of the current tested channel by using the switching box as the current tested channel, and executing the step d, otherwise, generating a test report according to the test results of all the test channels.
A test system for a base station remote radio unit, comprising: the device comprises control equipment, a switching box, a circulator, a test instrument, an antenna coupling disc, a baseband control unit (BBU) and a Radio Remote Unit (RRU), wherein the switching box is arranged between the antenna coupling disc and the circulator, and the circulator is connected with the test instrument;
the control equipment is used for triggering test initialization according to the type of a radio frequency test case to be executed, wherein the type comprises an uplink index test and a downlink index test; after the test initialization is finished, triggering a switching box to select a first test channel of a Radio Remote Unit (RRU) as a current channel to be tested; after the test of the current channel to be tested is finished, if the current radio frequency test case has a non-tested test channel, the switching box is triggered to select the next test channel of the current channel to be tested as the current channel to be tested, the circulator is triggered to call the corresponding test instrument and trigger the test instrument, the radio frequency index test is carried out on the current channel to be tested according to the radio frequency test case, and when the test of all the test channels is finished, a test report is generated according to the test results of all the test channels;
the switching box is used for selecting the current channel to be tested according to the triggering of the control equipment;
the circulator is used for calling a corresponding test instrument according to the triggering of the control equipment;
and the test instrument is used for carrying out radio frequency index test on the current channel to be tested according to the radio frequency test case and the triggering of the control equipment.
In summary, the method and system for testing the base station remote radio unit provided by the invention utilize the switching box to realize automatic switching among the channels in the testing process, and realize the automation of the RRU test of the channels, thereby effectively reducing the workload of the tester and greatly improving the testing quality and the testing efficiency.
Drawings
FIG. 1 is a schematic flow chart of a method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a system configuration according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of the switching box in fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The core idea of the invention is as follows: in the testing process, the control equipment controls the switching box arranged between the multi-channel RRU and the testing instrument to realize automatic switching among a plurality of channels, so that the workload of testing personnel can be effectively reduced, and the testing quality and the testing efficiency are greatly improved.
Fig. 1 is a schematic flow chart of a method according to an embodiment of the present invention, and as shown in fig. 1, the method for testing a remote radio unit of a base station implemented in the embodiment mainly includes:
The step is used for initializing the test environment, and because the test instruments corresponding to the test of the uplink index and the test of the downlink index in practical application are different, different devices need to be initialized by the uplink index test and the downlink index test.
Specifically, when the type of the radio frequency test case is an uplink index test, the test instrument is a signal source; and when the type of the radio frequency test case is a downlink index test, the test instrument is a frequency spectrograph.
Preferably, the test initialization of this step may include the following:
initializing a test instrument, a baseband control unit (BBU) and a switching box according to the type of the radio frequency test case; and after the BBU is successfully logged in, executing the radio frequency test case to configure the RRU, and establishing corresponding service information according to the type of the radio frequency test case.
In the above process, the initialization of the BBU is realized by logging in the BBU.
Preferably, the radio frequency test case may be generated by the following method:
and generating the radio frequency test case by adopting a tree test structure according to the test item and the test parameter configuration defined by the user in advance.
Specifically, the test parameters may be set by those skilled in the art according to actual needs, and may include, for example, cell bandwidth, frequency point, cell identifier ID, transmission line loss, reception line loss, and the like.
And 102, selecting a first test channel of the RRU as a current channel to be tested by using a switching box.
And 103, calling a corresponding test instrument according to the type of the radio frequency test case.
Specifically, the calling of the corresponding test instrument may be implemented by the following method:
when the type of the radio frequency test case is an uplink index test, connecting a radio frequency line of a current channel to be tested with a signal source through a circulator;
and when the type of the radio frequency test case is a downlink index test, connecting the radio frequency line of the current channel to be tested with the frequency spectrograph through the circulator.
And 104, performing radio frequency index test on the current channel to be tested according to the radio frequency test case by using the test instrument.
105-106, if the radio frequency test case has the untested test channel, the next test channel of the current tested channel is selected as the current tested channel by using the switching box, and the step 104 is executed, otherwise, a test report is generated according to the test results of all the test channels.
Here, if all the test channels have been tested, a test report is generated, and if there are channels that have not been tested, the switching box is used to automatically switch the test channels, so that the problems of low efficiency, complicated operation and the like in a manual mode can be avoided.
In the above embodiment, the test of the radio frequency index mainly simulates the generation of a corresponding signal through the control device, then performs the index test by controlling the signal source and the frequency spectrometer, and switches to the next channel through the control switch box after the index test of one channel is completed, and after all the test items in the test example are completed, the test result can be stored in a pre-specified path and automatically complete the table unloading function.
In practical application, besides testing the radio frequency index of the RRU, the RRU soft characteristic test can also be automated, and the automated implementation of soft characteristics such as FDR, DPD and the like does not need to operate the instrument any more, and mainly looks up the cell state and the related RRU alarm or soft characteristic test result after simulating the channel establishment process. The process mainly involves simulating the issuing of messages on a control interface of the BBU or performing corresponding operations through an RRU serial port. Specifically, the soft characteristic test can be implemented by the following method:
when the soft characteristic test is needed, initializing the corresponding soft characteristic test according to the soft characteristic test case to be executed; triggering the BBU to execute the soft characteristic test case, comparing the executed result with a preset expected result, and generating a corresponding soft test report according to the compared result; and releasing the environmental resources occupied by the soft characteristic test, and restoring the environmental configuration corresponding to the test initialization to a default value.
In the method, after the BBU executes the soft characteristic test case, the execution result needs to be compared with a preset expected result, so that the automatic verification of the soft characteristic test can be realized.
In addition, in the method, after the test is finished, the resource is released and the test environment is recovered, so that the test continuity among different channels can be ensured, and the automation of the whole test process is realized.
Preferably, the method can adopt the following method to realize the initialization of the soft characteristic test:
initializing the BBU and the switching box according to the soft characteristic test case; and after the BBU is initialized successfully, executing the soft characteristic test case to configure the RRU, and establishing corresponding service information according to the soft characteristic test case.
Fig. 2 is a schematic structural diagram of a test system of a base station remote radio unit corresponding to the above method, and as shown in fig. 2, the system includes: the device comprises control equipment, a switching box, a circulator, a test instrument, an antenna coupling disc, a baseband control unit (BBU) and a Radio Remote Unit (RRU).
Unlike prior art test systems, a switch box is introduced in this embodiment, which is located between the antenna coupling pad and the circulator. Thus, through the switching box, the automatic switching of the testing channels can be realized.
The control equipment is used for triggering test initialization according to the type of a radio frequency test case to be executed, wherein the type comprises an uplink index test and a downlink index test; after the test initialization is finished, triggering a switching box to select a first test channel of a Radio Remote Unit (RRU) as a current channel to be tested; after the test of the current channel to be tested is finished, if the current radio frequency test case has the test channel which is not tested, the switching box is triggered to select the next test channel of the current channel to be tested as the current channel to be tested, the circulator is triggered to call the corresponding test instrument and trigger the test instrument, the radio frequency index test is carried out on the current channel to be tested according to the radio frequency test case, and when the test of all the test channels is finished, a test report is generated according to the test results of all the test channels.
In practical application, the control device may be implemented by a computer device, and other devices in the test system may be controlled through an internal local area network formed by the HUB.
And the switching box is used for selecting the current channel to be tested according to the trigger of the control equipment.
And the circulator is used for calling the corresponding test instrument according to the trigger of the control equipment.
A BBU for generating a baseband signal.
The RRU is a tested device, and the test indexes and the soft characteristic test of the transceiver are realized in the RRU.
Fig. 3 is a schematic diagram of the internal structure of the switching box, as shown in fig. 3, there is a radio frequency line in the switching box to connect to the circulator, and the circulator has a direction to connect to the signal source or the spectrometer according to the direction selection.
And the test instrument is used for carrying out radio frequency index test on the current channel to be tested according to the radio frequency test case and the triggering of the control equipment.
When the type of the radio frequency test case is an uplink index test, the test instrument is a signal source; and when the type of the radio frequency test case is a downlink index test, the test instrument is a frequency spectrograph.
A signal source: the signal source is mainly used for testing uplink indexes and calibrating line loss. An external reference and an external Trigger provided by the BBU are needed for the signal source to perform uplink test, so that the synchronization of signals sent by the BBU, the RRU and the signal source can be ensured. For a signal source to emit a signal, it is necessary to set its frequency, amplitude value and set the waveform of the emitted signal (distribution of power in time, frequency and modulation domain). When the signal source is used, the circulator is used as much as possible, so that power is transmitted in a single direction, and a large signal is prevented from being reversely poured into the signal source.
A frequency spectrograph: the spectrum analyzer is mainly used for testing downlink indexes (such as ACLR, power, EVM and the like).
Preferably, the control device is configured to trigger initialization of the test instrument, BBU login information, and the switching box according to the type of the radio frequency test case; and after successfully logging in the BBU, executing the MML script of the radio frequency test case to configure the RRU, and establishing corresponding service information according to the type of the radio frequency test case.
Preferably, the circulator is configured to connect the radio frequency line of the current channel under test with the signal source when the type of the radio frequency test case is the uplink indicator test; and when the type of the radio frequency test case is a downlink index test, connecting the radio frequency line of the current channel to be tested with the frequency spectrograph.
Preferably, the control device is configured to generate the radio frequency test case by using a tree test structure in advance according to a test item and test parameter configuration defined by a user, where the test parameters include a cell bandwidth, a frequency point, a cell identifier ID, a transmission line loss, and a reception line loss.
Preferably, the control device is further configured to perform corresponding soft feature test initialization according to a to-be-executed soft feature test case when the soft feature test is required; triggering the BBU to execute the soft characteristic test case, comparing the executed result with a preset expected result, and generating a corresponding soft test report according to the compared result; and releasing the environmental resources occupied by the soft characteristic test, and restoring the environmental configuration corresponding to the test initialization to a default value.
Preferably, the control device is configured to initialize the BBU and the switching box according to the soft characteristic test case; and after the BBU is initialized successfully, executing the soft characteristic test case to configure the RRU, and establishing corresponding service information according to the soft characteristic test case.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A method for testing a base station Remote Radio Unit (RRU), comprising:
a. carrying out test initialization according to the type of a radio frequency test case to be executed, wherein the type comprises an uplink index test and a downlink index test;
b. selecting a first test channel of a Radio Remote Unit (RRU) as a current channel to be tested by using a switching box;
c. calling a corresponding test instrument according to the type of the radio frequency test case;
d. performing radio frequency index test on the current channel to be tested according to the radio frequency test case by using the test instrument;
e. if the radio frequency test case has the untested test channel, the switching box is used for selecting the next test channel of the current tested channel as the current tested channel, and the step d is executed, otherwise, a test report is generated according to the test results of all the test channels;
the method further comprises:
when the soft characteristic test is needed, initializing the corresponding soft characteristic test according to the soft characteristic test case to be executed;
triggering the BBU to execute the soft characteristic test case, comparing the executed result with a preset expected result, and generating a corresponding soft test report according to the compared result;
and releasing the environmental resources occupied by the soft characteristic test, and restoring the environmental configuration corresponding to the test initialization to a default value.
2. The method of claim 1, wherein the test initialization comprises:
initializing a test instrument, a baseband control unit (BBU) and a switching box according to the type of the radio frequency test case;
and after the BBU is successfully logged in, executing the radio frequency test case to configure the RRU, and establishing corresponding service information according to the type of the radio frequency test case.
3. The method according to claim 1, wherein when the type of the radio frequency test case is an uplink indicator test, the test instrument is a signal source; and when the type of the radio frequency test case is a downlink index test, the test instrument is a frequency spectrograph.
4. The method of claim 1, wherein said invoking the corresponding test meter comprises:
when the type of the radio frequency test case is an uplink index test, connecting a radio frequency line of a current channel to be tested with a signal source through a circulator;
and when the type of the radio frequency test case is a downlink index test, connecting the radio frequency line of the current channel to be tested with the frequency spectrograph through the circulator.
5. The method of claim 1, further comprising:
and generating the radio frequency test case by adopting a tree test structure according to test item and test parameter configuration defined by a user in advance, wherein the test parameters comprise cell bandwidth, frequency points, cell Identification (ID), transmission line loss and reception line loss.
6. The method of claim 1, wherein the soft characterization test initialization comprises:
initializing the BBU and the switching box according to the soft characteristic test case;
and after the BBU is initialized successfully, executing the soft characteristic test case to configure the RRU, and establishing corresponding service information according to the soft characteristic test case.
7. A system for testing a remote radio unit of a base station, comprising: the device comprises control equipment, a switching box, a circulator, a test instrument, an antenna coupling disk, a baseband control unit (BBU) and a Radio Remote Unit (RRU), wherein the switching box is arranged between the antenna coupling disk and the circulator, and the circulator is connected with the test instrument;
the control equipment is used for triggering test initialization according to the type of a radio frequency test case to be executed, wherein the type comprises an uplink index test and a downlink index test; after the test initialization is finished, triggering a switching box to select a first test channel of a Radio Remote Unit (RRU) as a current channel to be tested; after the test of the current channel to be tested is finished, if the current radio frequency test case has a non-tested test channel, the switching box is triggered to select the next test channel of the current channel to be tested as the current channel to be tested, the circulator is triggered to call the corresponding test instrument and trigger the test instrument, the radio frequency index test is carried out on the current channel to be tested according to the radio frequency test case, and when the test of all the test channels is finished, a test report is generated according to the test results of all the test channels; when the soft characteristic test is required, initializing the corresponding soft characteristic test according to the soft characteristic test case to be executed; triggering the BBU to execute the soft characteristic test case, comparing the executed result with a preset expected result, and generating a corresponding soft test report according to the compared result; releasing the environmental resources occupied by the soft characteristic test, and restoring the environmental configuration corresponding to the test initialization to a default value;
the switching box is used for selecting the current channel to be tested according to the triggering of the control equipment;
the circulator is used for calling a corresponding test instrument according to the triggering of the control equipment;
and the test instrument is used for carrying out radio frequency index test on the current channel to be tested according to the radio frequency test case and the triggering of the control equipment.
8. The system of claim 7, wherein the control device is configured to trigger initialization of the test instrument, the BBU, and the switch box according to the type of the radio frequency test case; and after the BBU is initialized successfully, executing the radio frequency test case to configure the RRU, and establishing corresponding service information according to the type of the radio frequency test case.
9. The system of claim 7, wherein when the type of the radio frequency test case is an uplink indicator test, the test instrument is a signal source; and when the type of the radio frequency test case is a downlink index test, the test instrument is a frequency spectrograph.
10. The system of claim 7, wherein the circulator is configured to connect a radio frequency line of a current channel under test with a signal source when the type of the radio frequency test case is an uplink indicator test; and when the type of the radio frequency test case is a downlink index test, connecting the radio frequency line of the current channel to be tested with the frequency spectrograph.
11. The system according to claim 7, wherein the control device is configured to generate the radio frequency test case in a tree test structure in advance according to a test item and a test parameter configuration defined by a user, where the test parameter includes a cell bandwidth, a frequency point, a cell identifier ID, a transmission line loss, and a reception line loss.
12. The system according to claim 7, wherein the control device is configured to perform initialization of the BBU and the switch box according to the soft feature test case; and after the BBU is initialized successfully, executing the soft characteristic test case to configure the RRU, and establishing corresponding service information according to the soft characteristic test case.
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