CN111200838A - Massive MIMO external field test method and system - Google Patents
Massive MIMO external field test method and system Download PDFInfo
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- CN111200838A CN111200838A CN201811367975.2A CN201811367975A CN111200838A CN 111200838 A CN111200838 A CN 111200838A CN 201811367975 A CN201811367975 A CN 201811367975A CN 111200838 A CN111200838 A CN 111200838A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
- H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides a Massive MIMO external field test method and a system, belonging to the technical field of wireless communication. Massive MIMO external field test system, including: the test instrument carrying tool is used for carrying a test instrument to finish testing in the air; the positioning device is used for acquiring the position information of the test instrument; the distance and angle measuring device is used for measuring the distance and the angle between the antenna of the tested base station and the test instrument; the test instrument is used for completing the test of communication data; and the ground control device is used for controlling the motion of the test instrument carrier according to the position information obtained by the positioning device and the measurement data obtained by the distance and angle measuring device and processing the test data obtained by the test instrument. By the technical scheme, the external field test of 5G Massive MIMO can be efficiently and accurately completed.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a Massive MIMO external field test method and a system.
Background
The 5G system adopts a Massvie MIMO (large-scale antenna technology) technology to improve coverage and spectral efficiency, and the masive MIMO technology has become a key technology of 5G. The 5G Massive MIMO technology improves system performance through large-scale antenna array and beam scanning, and can implement not only horizontal beam forming and beam scanning but also vertical beam forming and beam scanning, as shown in fig. 1.
At present, in order to evaluate Massive MIMO performance in an external field, a telecom operator or a base station manufacturer mainly adopts manual driving or carries a road test instrument on foot to carry out external field test. For high-rise coverage, when Massive MIMO technology is adopted to cover the indoor space, the instrument is required to be carried manually to test each layer of signals of the high-rise, the test efficiency is low, and the test accuracy is poor. And the three-dimensional coverage effect of Massive MIMO is difficult to accurately evaluate by the current testing means.
The existing outfield test scheme has the following disadvantages:
the test time is long, the efficiency is low: in the Massive MIMO external field test process, the manual test efficiency is very low, each planned test point needs to be manually walked or driven to arrive, and the test of relevant indexes is completed.
The test accuracy is poor: because the difference of different testers' operation processes and professional knowledge will bring about the test deviation inevitably, even same tester also can cause the deviation because of test angle, antenna position etc. in different test places. Moreover, the existing instrument and test method can not accurately realize the test of the Massive MIMO three-dimensional coverage effect, and can only complete the map dotting test according to the external field condition.
Disclosure of Invention
The invention aims to provide a Massive MIMO external field test method and a Massive MIMO external field test system, which can efficiently and accurately complete the external field test of 5G Massive MIMO.
To solve the above technical problem, embodiments of the present invention provide the following technical solutions:
in one aspect, an embodiment of the present invention provides a Massive MIMO external field test system, including:
the test instrument carrying tool is used for carrying a test instrument to finish testing in the air;
the test instrument is used for completing the test of communication data;
and the ground control device is used for controlling the motion of the test instrument carrier and processing the test data obtained by the test instrument.
Further, still include:
the positioning device is used for acquiring the position information of the test instrument;
the distance and angle measuring device is used for measuring the distance and the angle between the antenna of the tested base station and the test instrument;
the ground control device is specifically configured to control the movement of the test instrument carrier according to the position information obtained by the positioning device and the measurement data obtained by the distance and angle measurement device.
Further, the test instrument carrier is an unmanned aerial vehicle.
Further, the test data includes at least one of: signal strength, cell information, beam information.
Further, the ground control device is also used for controlling the base station to be tested to transmit a fixed beam; or
And controlling the auxiliary terminal on the auxiliary vehicle to continuously communicate with the base station to be tested to fix the beam to be tested.
Further, the ground control device is specifically configured to establish a spherical coordinate system according to the position information of the measured base station antenna obtained by the distance and angle measuring device, where the measured base station antenna is located at the center of the spherical coordinate system; judging far field conditions according to the size of the antenna of the tested base station and the test frequency band; determining an air flight route and a test point position of the test instrument carrier so that the test instrument can test at the test point position, wherein the spherical coordinate radius L of the air flight route meets the far field condition; and receiving the test data of the test instrument and processing the test data.
The embodiment of the invention also provides a Massive MIMO external field test method, which is applied to the Massive MIMO external field test system and comprises the following steps:
carrying a test instrument by using the test instrument carrier to test in the air;
testing communication data by using the test instrument;
and controlling the motion of the test instrument carrier by using the ground control device, and processing the test data obtained by the test instrument.
Further, the Massive MIMO external field test system further includes a positioning device and a ranging and angle measuring device, and the method further includes:
acquiring the position information of the test instrument by using the positioning device;
measuring the distance and the angle between the antenna of the tested base station and the test instrument by using the distance and angle measuring device;
the controlling motion of the test meter vehicle with the ground control device comprises:
and controlling the motion of the test instrument carrier by using the ground control device according to the position information obtained by the positioning device and the measurement data obtained by the distance and angle measuring device.
Further, in performing the testing, the method further comprises:
controlling the base station to be tested to transmit a fixed beam by utilizing the ground control device; or
And fixing the measured beam by using the uninterrupted communication between the auxiliary terminal on the auxiliary vehicle and the measured base station.
Further, the controlling, by the ground control device, the motion of the test instrument carrier according to the position information obtained by the positioning device and the measurement data obtained by the distance and angle measuring device, and processing the test data obtained by the test instrument includes:
establishing a spherical coordinate system according to the position information of the measured base station antenna obtained by the distance and angle measuring device, wherein the measured base station antenna is positioned at the central position of the spherical coordinate system;
judging far field conditions according to the size of the antenna of the tested base station and the test frequency band;
determining an air flight route and a test point position of the test instrument carrier so that the test instrument can test at the test point position, wherein the spherical coordinate radius L of the air flight route meets the far field condition;
and receiving the test data of the test instrument and processing the test data.
Further, the far-field condition R is:
3D and 3 lambda, wherein D is the size of the antenna of the tested base station, and lambda is the wavelength of the test frequency band; when the distance L between the test instrument and the antenna of the tested base station>And R, the far-field condition is considered to be satisfied.
Further, the determining the air flight route and the test point location of the test instrument vehicle comprises:
determining the test site location according to the following formula:
wherein, P is the total aerial radiation power of the base station antenna to be tested, EIRP is the effective omnidirectional radiation power of any point in the air, (theta, phi) is the coordinate of the test point in the spherical coordinate system, theta has N values from 0 degree to 180 degrees, and phi has M values from 0 degree to 360 degrees.
The embodiment of the invention also provides Massive MIMO external field test equipment which comprises a memory, a processor and a computer program, wherein the computer program is stored on the memory and can run on the processor; when the processor executes the program, the Massive MIMO external field test method is realized.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the Massive MIMO external field testing method described above.
The embodiment of the invention has the following beneficial effects:
in the above scheme, a Massive MIMO external field test system is provided, including test instrument delivery vehicle, test instrument, ground control device, mutually support and can accomplish Massive MIMO external field test high-efficiently. After the flight route and the test point position of the test instrument carrier are set in the whole test process, the test instrument carrier can fly according to the set flight route, the test instrument automatically completes all tests and transmits test data back to the ground control device in real time, the ground control device judges the accuracy and the effectiveness of the test data in real time, and finally a Massive MIMO three-dimensional coverage map is obtained, which is greatly superior to the test efficiency of manually carrying the test instrument to reach a test site for testing.
Drawings
FIG. 1 is a schematic diagram of a Massive MIMO beam scan;
FIG. 2 is a block diagram of a Massive MIMO external field test system according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a Massive MIMO external field test method according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart of a Massive MIMO external field test method according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a coordinate system of a ball system according to an embodiment of the present invention;
fig. 6 is a schematic diagram of an aerial flight route and a test point location of the unmanned aerial vehicle according to the embodiment of the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention provides a Massive MIMO external field test method and a Massive MIMO external field test system, which can efficiently and accurately complete the external field test of 5G Massive MIMO.
An embodiment of the present invention provides a Massive MIMO external field test system, as shown in fig. 2, including:
the test instrument carrier 11 is used for carrying a test instrument 14 to finish testing in the air;
the test instrument 14 is used for completing the test of communication data;
and the ground control device 15 is used for the motion of the test instrument carrier 11 and processing the test data obtained by the test instrument 14.
Further, as shown in fig. 2, the system further includes:
the positioning device 12 is used for acquiring the position information of the test instrument 14;
the distance and angle measuring device 13 is used for measuring the distance and angle between the antenna of the base station to be measured and the test instrument 14;
and the ground control device 15 is specifically configured to control the motion of the test instrument carrier 11 according to the position information obtained by the positioning device 12 and the measurement data obtained by the distance and angle measuring device 13.
In the embodiment, a Massive MIMO external field test system is provided, which comprises a test instrument carrier 11, a positioning device 12, a distance and angle measuring device 13, a test instrument 14 and a ground control device 15, which are mutually matched to efficiently complete Massive MIMO external field test. After the flight route and the test point position of the test instrument carrier 11 are set in the whole test process, the test instrument carrier 11 can fly according to the set flight route, the test instrument 14 automatically completes all tests and transmits test data back to the ground control device 15 in real time, the ground control device 15 judges the accuracy and the effectiveness of the test data in real time, and finally obtains a Massive MIMO three-dimensional coverage map which is greatly superior to the test efficiency of manually carrying the test instrument 14 to reach a test site for testing. In the embodiment, the whole testing process is automatically completed, the accuracy of the flight route and the testing point position of the testing instrument carrier 11 is ensured by the positioning device 12 and the distance and angle measuring device 13, and the testing error caused by manual operation is avoided, so that the testing accuracy and objectivity can be greatly improved.
The positioning device 12, the distance and angle measuring device 13 and the test instrument 14 may be separately arranged or may be an integrated structure.
Further, the Massive MIMO external field test system further includes:
and the adjustable attenuator is used for simulating the insertion loss of the channel, so that the insertion loss of the indoor channel can be simulated, and the indoor coverage evaluation is completed.
In particular, the test meter vehicle 11 may be a drone.
Further, the test data includes at least one of: signal strength, cell information, beam information.
Further, the ground control device 15 is also used for controlling the base station under test to transmit a fixed beam; or
And controlling the auxiliary terminal on the auxiliary vehicle to continuously communicate with the base station to be tested to fix the beam to be tested, so that the beam to be tested can be fixed for testing.
Further, the ground control device 15 is specifically configured to establish a spherical coordinate system according to the position information of the measured base station antenna obtained by the distance and angle measuring device 13, where the measured base station antenna is located at the center of the spherical coordinate system; judging far field conditions according to the size of the antenna of the tested base station and the test frequency band; determining an air flight route and a test point location of the test instrument carrier 11 so that the test instrument 14 can test at the test point location, wherein the spherical coordinate radius L of the air flight route meets the far field condition; and receiving the test data of the test instrument 14, and processing the test data.
Further, the far-field condition R is:
maximum of 3D, 3 λThe value, wherein D is the size of the antenna of the tested base station, and lambda is the wavelength of the test frequency band; when the distance L between the test instrument 14 and the antenna of the base station to be tested>And R, the far-field condition is considered to be satisfied.
Further, the ground control device 15 is specifically configured to determine the test point location according to the following formula:
wherein, P is the total aerial radiation power of the base station antenna to be tested, EIRP is the effective omnidirectional radiation power of any point in the air, (theta, phi) is the coordinate of the test point in the spherical coordinate system, theta has N values from 0 degree to 180 degrees, and phi has M values from 0 degree to 360 degrees.
The embodiment of the present invention further provides a Massive MIMO external field test method, which is applied to the Massive MIMO external field test system described above, and as shown in fig. 3, the method includes:
step 201: carrying a test instrument by using the test instrument carrier to test in the air;
step 202: testing communication data by using the test instrument;
step 203: and controlling the motion of the test instrument carrier by using the ground control device, and processing the test data obtained by the test instrument.
Further, the Massive MIMO external field test system further includes a positioning device and a ranging and angle measuring device, and the method further includes:
acquiring the position information of the test instrument by using the positioning device;
measuring the distance and the angle between the antenna of the tested base station and the test instrument by using the distance and angle measuring device;
the controlling motion of the test meter vehicle with the ground control device comprises:
and controlling the motion of the test instrument carrier by using the ground control device according to the position information obtained by the positioning device and the measurement data obtained by the distance and angle measuring device.
In the embodiment, a Massive MIMO external field test system is provided, which comprises a test instrument carrier 11, a positioning device 12, a distance and angle measuring device 13, a test instrument 14 and a ground control device 15, which are mutually matched to efficiently complete Massive MIMO external field test. After the flight route and the test point position of the test instrument carrier 11 are set in the whole test process, the test instrument carrier 11 can fly according to the set flight route, the test instrument 14 automatically completes all tests and transmits test data back to the ground control device 15 in real time, the ground control device 15 judges the accuracy and the effectiveness of the test data in real time, and finally obtains a Massive MIMO three-dimensional coverage map which is greatly superior to the test efficiency of manually carrying the test instrument 14 to reach a test site for testing. In the embodiment, the whole testing process is automatically completed, the accuracy of the flight route and the testing point position of the testing instrument carrier 11 is ensured by the positioning device 12 and the distance and angle measuring device 13, and the testing error caused by manual operation is avoided, so that the testing accuracy and objectivity can be greatly improved.
Further, in performing the testing, the method further comprises:
and the adjustable attenuator is used for simulating the insertion loss of the channel, so that the insertion loss of the indoor channel can be simulated, and the indoor coverage evaluation is completed.
Further, in performing the testing, the method further comprises:
controlling the base station to be tested to transmit a fixed beam by utilizing the ground control device; or
The auxiliary terminal on the auxiliary vehicle is used for continuously communicating with the base station to be tested to fix the beam to be tested, so that the beam to be tested can be fixed for testing.
Further, the controlling, by the ground control device, the motion of the test instrument carrier according to the position information obtained by the positioning device and the measurement data obtained by the distance and angle measuring device, and processing the test data obtained by the test instrument includes:
establishing a spherical coordinate system according to the position information of the measured base station antenna obtained by the distance and angle measuring device, wherein the measured base station antenna is positioned at the central position of the spherical coordinate system;
judging far field conditions according to the size of the antenna of the tested base station and the test frequency band;
determining an air flight route and a test point position of the test instrument carrier so that the test instrument can test at the test point position, wherein the spherical coordinate radius L of the air flight route meets the far field condition;
and receiving the test data of the test instrument and processing the test data.
Further, the far-field condition R is:
3D and 3 lambda, wherein D is the size of the antenna of the tested base station, and lambda is the wavelength of the test frequency band; when the distance L between the test instrument and the antenna of the tested base station>And R, the far-field condition is considered to be satisfied.
Further, the determining the air flight route and the test point location of the test instrument vehicle comprises:
determining the test site location according to the following formula:
wherein, P is the total aerial radiation power of the base station antenna to be tested, EIRP is the effective omnidirectional radiation power of any point in the air, (theta, phi) is the coordinate of the test point in the spherical coordinate system, theta has N values from 0 degree to 180 degrees, and phi has M values from 0 degree to 360 degrees.
The technical solution of the present invention is further described with reference to the accompanying drawings and specific embodiments.
The invention provides an automatic, efficient and accurate Massive MIMO external field test system, which mainly comprises: test unmanned aerial vehicle (being above-mentioned test instrument delivery vehicle promptly), positioner, range finding angle measuring device, test instrument, ground controlling means. The unmanned test vehicle is mainly used for carrying a test instrument to complete testing in the air; the positioning device mainly acquires the longitude and latitude and other position information of the test instrument; the distance and angle measuring device mainly measures the position of the antenna of the base station to be measured, the distance between the unmanned aerial vehicle and the antenna of the base station to be measured and the angle; the test instrument mainly completes the tests of signal intensity, cell information, beam information and the like; furthermore, the test system also comprises an adjustable attenuator which is mainly used for simulating channel insertion loss; the ground control device mainly completes the flight control of the unmanned aerial vehicle and the acquisition and processing of test data (including position information, distance and angle data, signal intensity, cell information, beam information and the like) through a control channel and a data channel.
In actual work, Massvie MIMO broadcast beams of a base station work in a scanning mode in the air, service beams change in real time according to the position of a terminal, and a tested beam is often required to be fixed in a test process so as to facilitate the test. In this embodiment, two methods are used for fixing the measured beam: the utility model provides a control basic station transmission fixed beam through ground controlling means, the second kind mode adopts another or many supplementary unmanned aerial vehicle, and every unmanned aerial vehicle carries auxiliary terminal and fixes the survey beam through incessant and survey basic station communication, and this one or many supplementary unmanned aerial vehicle and test unmanned aerial vehicle are controlled and coordinate by ground controlling means.
As shown in fig. 4, the Massive MIMO external field testing method of the present embodiment includes the following steps:
a spherical coordinate system as shown in fig. 5 is first established. The ground control device controls the test unmanned aerial vehicle to lift off, the position, the size and the height of the antenna of the tested base station are determined through the distance and angle measuring device with the camera equipment in the air, a related spherical coordinate system is established, wherein the antenna of the tested base station is located at the central position of the spherical coordinate system, and Phi is defined to be along the Z-axis direction.
And the base station is controlled by the ground control device to transmit fixed beams or the beam is fixed by assisting the unmanned aerial vehicle to carry an auxiliary terminal to continuously communicate with the base station to be tested.
Next far field conditions are established as well as test distances. Specifically, the far field condition is determined according to the antenna size of the base station to be tested and the test frequency band, and the test distance L needs to satisfy the far field condition.
According to electromagnetic field theory, the far field condition R is:
3D and 3 lambda, wherein D is the size of the antenna of the tested base station, and lambda is the wavelength of the tested frequency band. Distance L between test instrument carried by unmanned aerial vehicle and antenna of tested base station>And when R is obtained, the far field condition is considered to be met.
And thirdly, determining a test point position according to the test precision and the test time requirement. The minimum interval between theta and phi is determined, the flight path of the unmanned aerial vehicle is set, the test is carried out according to the set test point positions, and the test instrument transmits test data back to the ground control device in real time.
Assuming that the total radiation power of the antenna of the measured base station in the air is P, and the effective omnidirectional radiation power of any point in the air is EIRP, calculating according to the spherical coordinate integral to obtain a formula 1:
in the actual test, discretization processing needs to be performed on continuous spherical coordinates, and if θ is divided into N intervals from 0 degree to 180 degrees and φ is divided into M intervals from 0 degree to 360 degrees, a formula 2 is obtained:
according to equation 2, for example: if θ is 3 degrees to the minimum interval, N is 180/3-60, and if Φ is 6 degrees to the minimum interval, M is 360/6-60. That is, the unmanned aerial vehicle tests at 59 × 60 ═ 3540 points. Fig. 6 is a schematic diagram of an aerial flight route and a test point location of the unmanned aerial vehicle according to the embodiment of the invention.
And the positioning device and the distance and angle measuring device ensure that the flight path and the test point position are kept accurate in flight. The radius L of the spherical coordinate in flight needs to be ensured to meet the far-field condition, and test data obtained by the test instrument is transmitted back to the ground control device in real time.
And fourthly, the ground control device completes the processing of the test data and generates a three-dimensional coverage graph. The ground control device processes and judges the test data, and if the evaluation of the indoor coverage of the high-rise building is to be finished, the insertion loss of an indoor channel can be simulated through the attenuation value of the preset adjustable attenuator, so that the indoor coverage evaluation is finished.
In this embodiment, a Massive MIMO external field test system is provided, including test unmanned aerial vehicle, positioner, range finding goniometer device, test instrument, ground control device, mutually support and can accomplish Massive MIMO external field test high-efficiently. The unmanned test vehicle is mainly used for carrying a test instrument to complete testing in the air; the positioning device mainly acquires position information such as longitude and latitude; the distance and angle measuring device mainly measures the position of the antenna of the base station to be measured, the distance between the unmanned aerial vehicle and the antenna of the base station to be measured and the angle; the test instrument mainly completes the tests of signal intensity, cell information, beam information and the like; the adjustable attenuator is mainly used for simulating channel insertion loss; the ground control device mainly completes the flight control of the unmanned aerial vehicle and the acquisition and processing of test data (including position information, distance and angle data, signal intensity, cell information, beam information and the like) through a control channel and a data channel. After the flight route and the test point position of the test unmanned aerial vehicle are set in the whole test process, the test unmanned aerial vehicle can fly according to the set flight route, the test instrument automatically completes all tests and transmits test data back to the ground control device in real time, the ground control device judges the accuracy and the effectiveness of the test data in real time, and finally obtains a Massive MIMO three-dimensional coverage map which is greatly superior to the test efficiency of manually carrying the test instrument to reach a test site for testing. In this embodiment, whole test procedure is automatic to guaranteed the accuracy nature of test unmanned aerial vehicle flight route and test point location by positioner and range finding goniometer, avoided the test error that manual operation brought, thereby the improvement that can be very big test accuracy and objectivity.
The embodiment of the invention also provides Massive MIMO external field test equipment which comprises a memory, a processor and a computer program, wherein the computer program is stored on the memory and can run on the processor; when the processor executes the program, the Massive MIMO external field test method is realized.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the Massive MIMO external field testing method described above.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. A Massive MIMO external field test system is characterized by comprising:
the test instrument carrying tool is used for carrying a test instrument to finish testing in the air;
the test instrument is used for completing the test of communication data;
and the ground control device is used for controlling the motion of the test instrument carrier and processing the test data obtained by the test instrument.
2. The Massive MIMO external field test system according to claim 1, further comprising:
the positioning device is used for acquiring the position information of the test instrument;
the distance and angle measuring device is used for measuring the distance and the angle between the antenna of the tested base station and the test instrument;
the ground control device is specifically configured to control the movement of the test instrument carrier according to the position information obtained by the positioning device and the measurement data obtained by the distance and angle measurement device.
3. The Massive MIMO external field test system according to claim 1,
the test instrument carrier is an unmanned aerial vehicle.
4. The Massive MIMO external field test system of claim 1, wherein the test data comprises at least one of: signal strength, cell information, beam information.
5. The Massive MIMO external field test system according to claim 1,
the ground control device is also used for controlling the base station to be tested to emit fixed beams; or
And controlling the auxiliary terminal on the auxiliary vehicle to continuously communicate with the base station to be tested to fix the beam to be tested.
6. The Massive MIMO external field test system according to claim 2,
the ground control device is specifically used for establishing a spherical coordinate system according to the position information of the measured base station antenna obtained by the distance and angle measuring device, and the measured base station antenna is positioned at the central position of the spherical coordinate system; judging far field conditions according to the size of the antenna of the tested base station and the test frequency band; determining an air flight route and a test point position of the test instrument carrier so that the test instrument can test at the test point position, wherein the spherical coordinate radius L of the air flight route meets the far field condition; and receiving the test data of the test instrument and processing the test data.
7. A Massive MIMO external field test method applied to the Massive MIMO external field test system of any one of claims 1-6, comprising:
carrying a test instrument by using the test instrument carrier to test in the air;
testing communication data by using the test instrument;
and controlling the motion of the test instrument carrier by using the ground control device, and processing the test data obtained by the test instrument.
8. The method of claim 7, wherein the Massive MIMO external field testing system further comprises a positioning device and a ranging and angle measuring device, and the method further comprises:
acquiring the position information of the test instrument by using the positioning device;
measuring the distance and the angle between the antenna of the tested base station and the test instrument by using the distance and angle measuring device;
the controlling motion of the test meter vehicle with the ground control device comprises:
and controlling the motion of the test instrument carrier by using the ground control device according to the position information obtained by the positioning device and the measurement data obtained by the distance and angle measuring device.
9. The Massive MIMO external field testing method of claim 7, wherein in performing the testing, the method further comprises:
controlling the base station to be tested to transmit a fixed beam by utilizing the ground control device; or
And fixing the measured beam by using the uninterrupted communication between the auxiliary terminal on the auxiliary vehicle and the measured base station.
10. The Massive MIMO external field test method according to claim 8, wherein the controlling the movement of the test instrument carrier by the ground control device according to the position information obtained by the positioning device and the measurement data obtained by the distance and angle measuring device comprises:
establishing a spherical coordinate system according to the position information of the measured base station antenna obtained by the distance and angle measuring device, wherein the measured base station antenna is positioned at the central position of the spherical coordinate system;
judging far field conditions according to the size of the antenna of the tested base station and the test frequency band;
and determining an air flight route and a test point position of the test instrument carrier so that the test instrument can test at the test point position, wherein the spherical coordinate radius L of the air flight route meets the far field condition.
11. The Massive MIMO external field test method according to claim 10,
the far-field condition R is:
3D and 3 lambda, wherein D is the size of the antenna of the tested base station, and lambda is the wavelength of the test frequency band; when the distance L between the test instrument and the antenna of the tested base station>And R, the far-field condition is considered to be satisfied.
12. The Massive MIMO external field testing method according to claim 10, wherein the determining the air flight route and the test point location of the test instrument carrier comprises:
determining the test site location according to the following formula:
wherein, P is the total aerial radiation power of the base station antenna to be tested, EIRP is the effective omnidirectional radiation power of any point in the air, (theta, phi) is the coordinate of the test point in the spherical coordinate system, theta has N values from 0 degree to 180 degrees, and phi has M values from 0 degree to 360 degrees.
13. A Massive MIMO external field test device comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor; wherein the processor implements the Massive MIMO external field testing method as claimed in any one of claims 7-12 when executing the program.
14. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the Massive MIMO external field testing method according to any one of claims 7 to 12.
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