CN112333757B - Wireless communication test method and system - Google Patents
Wireless communication test method and system Download PDFInfo
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- CN112333757B CN112333757B CN202011101386.7A CN202011101386A CN112333757B CN 112333757 B CN112333757 B CN 112333757B CN 202011101386 A CN202011101386 A CN 202011101386A CN 112333757 B CN112333757 B CN 112333757B
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Abstract
The embodiment of the invention provides a wireless communication test method and a system, comprising the following steps: the method comprises the steps that target frequency is configured on frequency conversion equipment and wireless communication equipment respectively, then the frequency conversion equipment and the wireless communication equipment are arranged on two auxiliary equipment according to a preset distribution mode, then the two auxiliary equipment move oppositely according to frequency conversion times to obtain extended Doppler frequency shift under a target vehicle speed, finally the wireless communication equipment obtains a test result by detecting a wireless communication signal emitted by the other wireless communication equipment, and a frequency conversion processing scheme is constructed, so that the purpose of testing the influence of the Doppler frequency shift on wireless communication under a high-speed moving scene is achieved, and the problems of high cost, low timeliness and poor flexibility caused by the fact that the requirement on a test system for evaluating the adaptability of a wireless communication system under a high-speed moving environment is overhigh are solved.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a wireless communication testing method and system.
Background
At present, with the rapid development progress of society, the mobility of communication environment is gradually increased, and particularly with the development of rail transit, the speed of train operation is higher and higher in recent years. Therefore, the high-speed movement brings huge doppler effect to the wireless communication, the doppler effect brings certain influence to the wireless communication, and although data can be obtained through simulation in a laboratory, the data has certain difference with an actual channel model, so that a test system moving at high speed is urgently required to be constructed in an actual environment.
For constructing a high-speed mobile test system, the wireless communication capability is evaluated by testing the communication system directly on a high-speed mobile locomotive or by a spacecraft, but the above solutions have high cost or complicated approval process, and the two solutions are not usually adopted in the initial stage.
The existing commonly adopted method is to erect a group of communication transceiver equipment through two test automobiles and start the test automobiles to move in opposite directions so as to obtain extended Doppler frequency shift, the method has low cost, and the cost performance and the flexibility are the most reasonable for verifying the communication capability of a wireless communication system in a high-speed environment, so that the method is commonly used at home and abroad to test various different wireless communication systems. However, the moving speed of the automobile usually does not exceed 120km/h, only 132km/h is needed even if the automobile is overspeed by 10%, and the speed can reach 262km/h but not reach the speed of the existing high-speed rail operation in consideration of opposite driving, so that the method cannot directly obtain the test result in a higher moving scene.
In summary, how to design a test method to construct a high-speed mobile test system by increasing doppler shift is an urgent problem to meet the wireless communication test requirement in a high-speed mobile scenario.
Disclosure of Invention
The embodiment provides a wireless communication test method and a wireless communication test system, wherein a frequency conversion processing mode is constructed to improve Doppler frequency shift so as to evaluate the wireless communication capacity under a high-speed moving scene based on the extended Doppler frequency shift, and the problem of wireless communication test under the high-speed moving scene is solved.
In a first aspect, an embodiment of the present invention provides a wireless communication testing method, where the method includes:
the method comprises the steps that frequency conversion equipment and wireless communication equipment respectively obtain target frequencies, wherein the target frequencies are frequency conversion times required by a target vehicle speed and frequencies required to be configured and determined by current channel resources, the number of the wireless communication equipment is two, and the number of the frequency conversion equipment is the same as the frequency conversion times;
the frequency conversion equipment and the wireless communication equipment are arranged in two auxiliary equipment according to a preset distribution mode;
the two auxiliary equipment perform opposite movement according to a preset rule to obtain target Doppler frequency shift, wherein the target Doppler frequency shift is extended Doppler frequency shift generated based on the target vehicle speed, and the current speeds of the two auxiliary equipment are the same;
the wireless communication equipment obtains a test result by detecting a wireless communication signal transmitted by the other wireless communication equipment.
Further, the frequency conversion equipment and the wireless communication equipment are arranged in two auxiliary equipment according to a preset distribution mode, and the frequency conversion equipment and the wireless communication equipment comprise: and the frequency conversion equipment and the wireless communication equipment are distributed in the two auxiliary equipment in an ascending order or a descending order based on the frequency conversion times and the configured frequency.
Further, the two auxiliary devices perform opposite motion according to a preset rule to obtain the target doppler frequency shift, including: and the two auxiliary devices carry out back-and-forth opposite movement of the path according to the frequency conversion times to obtain the target Doppler frequency shift.
Further, the wireless communication device sets the direction of its antenna to be directional.
Further, the wireless communication device obtains a test result by detecting a wireless communication signal transmitted by another wireless communication device, including: and under the condition of the obtained target Doppler frequency shift, the wireless communication equipment evaluates the wireless communication capacity by judging whether a wireless communication signal transmitted by another wireless communication equipment is received, if so, the wireless communication capacity is determined to meet the wireless communication requirement under the target vehicle speed, otherwise, the wireless communication capacity is determined not to meet the wireless communication requirement under the target vehicle speed.
Further, after the two auxiliary devices perform the opposite motion according to the preset rule to obtain the target doppler frequency shift, before the wireless communication device obtains the test result by detecting the wireless communication signal transmitted by the other wireless communication device, the method further includes: and the wireless communication equipment acquires the target Doppler frequency shift error and verifies that the target Doppler frequency shift error does not exceed a threshold value.
The embodiment of the invention provides a wireless communication test method, which comprises the following steps: the method comprises the steps that target frequencies are respectively configured on frequency conversion equipment and wireless communication equipment, then the frequency conversion equipment and the wireless communication equipment are arranged on auxiliary equipment according to a preset distribution mode, then the auxiliary equipment moves in a reverse direction according to frequency conversion times to obtain extended Doppler frequency shift under a target vehicle speed, finally the wireless communication equipment obtains a test result by detecting a wireless communication signal transmitted by another wireless communication equipment, the problem of wireless communication test under a high-speed moving scene is solved, the frequency conversion times required under the high-speed moving scene are evaluated by utilizing the operating speed (namely the target vehicle speed) under the high-speed moving scene and the operating speed (current speed of the auxiliary equipment) of an actual test scene, a frequency conversion processing scheme is constructed by combining the frequency conversion times and channel resources of a current wireless communication system, the frequency conversion equipment and the two wireless communication equipment which are the same in number as the frequency conversion times are arranged on the two auxiliary equipment according to the design of the frequency conversion processing scheme, the frequency conversion times are used as path transmission times between the two auxiliary equipment, and accordingly the frequency conversion times are used as path transmission times of the two auxiliary equipment under the same speed, the frequency conversion times are used for driving in a plurality of paths, the frequency conversion times, the frequency conversion equipment are used as the frequency conversion times, the frequency conversion times are used as the frequency conversion equipment, the frequency conversion times are constructed on the basis of the two auxiliary equipment, the Doppler frequency conversion times, the Doppler frequency of the wireless communication system, and the wireless communication of the wireless communication between the wireless communication system is obtained, and the extended Doppler frequency shift is further, and the wireless communication of the wireless communication system is improved, and accordingly, and the Doppler frequency of the wireless communication under the wireless communication is obtained, and the Doppler frequency of the wireless communication under the Doppler frequency of the wireless communication system is improved.
In a second aspect, an embodiment of the present invention further provides a wireless communication test system, including: a plurality of frequency conversion devices, two wireless communication devices and two auxiliary devices,
the frequency conversion equipment and the wireless communication equipment are used for acquiring a target frequency, wherein the target frequency is a frequency required to be configured and determined based on frequency conversion times required by a target vehicle speed and current channel resources, and the number of the frequency conversion equipment is the same as the frequency conversion times;
the frequency conversion equipment and the wireless communication equipment are also used for being arranged on the two auxiliary equipment according to a preset distribution mode;
the two auxiliary devices are used for carrying out opposite movement according to a preset rule to obtain target Doppler frequency shift, the target Doppler frequency shift is extended Doppler frequency shift generated based on the target vehicle speed, and the current speeds of the two auxiliary devices are the same;
the wireless communication equipment is also used for obtaining a test result by detecting a wireless communication signal transmitted by another wireless communication equipment.
Further, the frequency conversion device and the wireless communication device are further configured to: and performing ascending or descending order distribution on the two auxiliary devices based on the frequency conversion times and the configured frequency.
Further, the two auxiliary devices are specifically configured to: and carrying out back and forth opposite movement of the path according to the frequency conversion times to obtain the Doppler frequency shift of the target.
Further, the wireless communication device is also used for setting the direction of the antenna of the wireless communication device to be directional.
Further, the wireless communication device is specifically configured to: and under the condition of the acquired target Doppler frequency shift, evaluating wireless communication capacity by whether a wireless communication signal transmitted by another wireless communication device is received, if so, determining that the wireless communication capacity meets the requirement of wireless communication at the target vehicle speed, otherwise, determining that the wireless communication capacity does not meet the requirement of wireless communication at the target vehicle speed.
Further, the wireless communication device is further configured to: and acquiring the target Doppler frequency shift error, and verifying that the target Doppler frequency shift error does not exceed a threshold value.
The embodiment of the invention provides a wireless connectivity test system, which comprises: the method comprises the steps that the frequency conversion equipment, the two wireless communication devices and the two auxiliary equipment are respectively configured with target frequency, then the frequency conversion equipment and the wireless communication devices are arranged on the auxiliary equipment in a preset distribution mode, then the auxiliary equipment moves in the opposite direction according to the frequency conversion times to obtain extended Doppler frequency shift under a target vehicle speed, finally the wireless communication equipment obtains a test result by detecting a wireless communication signal transmitted by the other wireless communication equipment, the wireless communication test problem under a high-speed mobile scene is solved, the frequency conversion times required under the high-speed mobile scene are evaluated by utilizing the running speed under the high-speed mobile scene (namely the target vehicle speed) and the running speed of an actual test scene (the current speed of the auxiliary equipment), a frequency conversion processing scheme is constructed by combining the frequency conversion times and the channel resources of a current wireless communication system, the frequency conversion equipment and the two wireless communication devices which are the same in number as the frequency conversion times are arranged on the two auxiliary equipment according to the design of the frequency conversion processing scheme, the frequency conversion times are used as the frequency conversion times to be transmitted between the two auxiliary equipment, and the Doppler frequency conversion times are used as the path transmission times to obtain the extended Doppler frequency shift of the wireless communication system under the high-back-and-forth, and-forth Doppler frequency shift communication effect of the Doppler frequency shift system is obtained.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a wireless communication testing method according to an embodiment of the present invention;
fig. 2 is a flowchart of another wireless communication testing method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a wireless communication test system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another wireless communication test system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, in this document, the number of the auxiliary devices and the number of the wireless communication devices are 2, 2 auxiliary devices may be the same or different in terms of model, device parameter, and function setting, and the auxiliary devices may be test cars similar to cars, trucks, and the like, or one auxiliary device may be a test car, and the other auxiliary device may be a truck, as long as it is ensured that the current speeds of the two auxiliary devices are the same, in the following embodiment of the present invention, 2 test cars are exemplified, similarly, 2 wireless communication devices may be the same in terms of model, device parameter, function setting, and the like, and may receive and transmit signals, and the frequency conversion device is correspondingly set according to the requirements of the actual application scenarios, and in the following embodiment provided by the present invention, only the embodiment is exemplified, and the number of the embodiment is not specifically limited.
Moreover, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, a flowchart of a wireless communication testing method according to an embodiment of the present invention is provided, where the method includes:
The target frequency is a frequency which is determined based on frequency conversion times required by a target vehicle speed and a current channel resource and needs to be configured, the number of the wireless communication equipment is two, and the number of the frequency conversion equipment is the same as the frequency conversion times.
In this step, 2 test cars with the current maximum operating speed of 120km/h are required to be selected as auxiliary equipment, and the vehicle speed of 800km/h is used as a required vehicle speed (i.e. a target vehicle speed), so as to construct a wireless communication test system in a high-speed mobile scene, wherein in an operating environment with the current speed of 120km/h, the wireless communication equipment monitors that the bandwidth BW =10MHz occupied by the communication system, and the original carrier fc =8GHz of the whole wireless communication system, according to a formula:
can calculate the wireless communication test system required under the operating environment of the target vehicle speedThe frequency conversion times are carried out in a unified way, wherein N represents the frequency conversion times, V max Representing the current running speed, V, of the test vehicle ref Representing a target vehicle speed, obtaining the frequency conversion times N & ltx & gt 4.7 times, taking values by adopting a further method (only excluding), obtaining the frequency conversion times required under the running vehicle speed of 800km/h as 5 times, correspondingly adopting 5 frequency conversion devices with the same model, equipment parameters and function settings for testing according to the obtained frequency conversion times, in order to ensure the subsequent optimal test effect, in the frequency conversion process, reducing interference factors of channels and protecting communication bandwidth are required, so a certain bandwidth is required to be reserved for the wireless communication system for protection in the frequency conversion process, preferably, the bandwidth reserved for each frequency conversion in the embodiment of the invention is 2 BW, and the frequency spectrum resource required by the whole wireless communication system is 2 BW according to the frequency spectrum resource required by the whole wireless communication system, therefore, based on the frequency conversion times of 5 times, further obtaining the frequency spectrum resource required by the whole wireless communication system as 100MHz, and because the carrier subjected to frequency conversion changes, the carrier subjected to frequency conversion can be divided into f carrier waves of a low-frequency end LO Carrier f with high frequency side HO The frequency signal range of the low frequency end is f LO -BW/2～f LO The frequency signal range of + BW/2 high frequency end is f HO -BW/2～f HO + BW/2, wherein f HO ＝f LO +2*N*BW，fc＝(f LO +f HO ) 2, since the frequency conversion times are 5, the number of the frequency conversion devices is 5, the bandwidth BW occupied by the original channel is =10MHz, that is, under the running vehicle speed of 800km/h, the frequency signal of the low-frequency end of the wireless communication system is f LO -5～f LO +5 carriers f LO The frequency signal of the high frequency side is f HO -5～f HO +5 carriers f HO For frequency conversion equipment, the frequency is according to f LO /(f LO +2*BW)，f LO +2*(2*BW)/(f LO +3*(2*BW))，f LO +4*(2*BW)/(f LO +5*(2*BW))，...，f LO +1*(2*BW)/(f LO +2*(2*BW))，f LO +3*(2*BW)/(f LO +4 × bw) ],. The first value represents the frequency received by the frequency conversion device, and the second value represents the frequency transmitted by the frequency conversion device after frequency conversionAccording to the original carrier wave fc =8GHz, f of the wireless communication system under the operation environment of 120km/h HO ＝f LO +100，fc＝(f LO +f HO ) And 2, obtaining the carrier f at the low frequency end after the frequency conversion for 5 times LO =7950MHz, carrier f at high frequency end HO After that, the frequency settings of 5 pieces of frequency conversion devices were set at 7950MHz/7970mhz,7990mhz/8010mhz,8030mhz/8050mhz,7970mhz/7990mhz,8010mhz/8030MHz, and the frequencies of 2 pieces of wireless communication devices were set at 7950MHz and 8050MHz, respectively.
In addition, considering that the wavelength of the wireless communication device is approximately 3.75cm around an original carrier 8GHz, and in combination with that the previously acquired channel bandwidth is approximately 100MHz, and the ratio of the bandwidth to the original carrier is 0.0125, the antenna of the wireless communication device may adopt a plurality of modes such as a microstrip antenna, a slot array, a horn antenna, and the like according to actual situations, and further, in order to avoid channel interference and channel distortion, it is necessary to maintain a low noise requirement of a channel in a signal receiving process of the wireless communication device, and meanwhile, a transmission signal of the wireless communication device needs to meet a high linearity requirement, so that the size of the wireless communication device may be within a range of 30cm, the transmission power is not more than 30dB, the received noise coefficient NF is not higher than 3.0dB, and since a distance in a high-speed moving scene is mobile and changes, a dynamic wireless communication range needs to be supported according to a test area, so that the detection range of the signal of the wireless communication device is 50 meters to 1500 meters.
And 102, arranging the frequency conversion equipment and the wireless communication equipment in two auxiliary equipment according to a preset distribution mode.
And the frequency conversion equipment and the wireless communication equipment are distributed in the two auxiliary equipment in an ascending order or a descending order based on the frequency conversion times and the configured frequency.
In this step, with reference to step 101, after setting corresponding frequencies for the frequency conversion device and the wireless communication device, the frequency conversion device and the wireless communication device are placed on 2 test cars according to a preset distribution mode, where the preset distribution mode is: according to the method, when the frequency conversion number N is an odd number, the 2 wireless communication devices are installed on the same test automobile, when the frequency conversion number N is an even number, the 2 wireless communication devices are respectively installed on two test automobiles, and then the frequency conversion devices and the wireless communication devices are arranged on the 2 test automobiles in a scattered manner according to ascending or descending order of configured frequency, so that the frequency conversion devices and the wireless communication devices are arranged from the ascending order or the descending order according to a Z shape on the whole (when the frequency conversion number N is an even number, the arrangement mode can refer to fig. 3, and when the frequency conversion number N is an odd number, the arrangement mode can refer to fig. 4). Specifically, in the embodiment of the present invention, with reference to fig. 4, in this step, the frequency conversion devices with the set frequencies of 7950MHz/7970mhz,7990mhz/8010mhz, and 8030mhz/8050MHz are sequentially installed in one test vehicle, the frequency conversion devices with the set frequencies of 7970MHz/7990mhz,8010mhz/8030MHz are sequentially arranged, and the wireless communication device with the frequency set to 7950MHz is arranged before the frequency conversion device with the frequency set to 7970MHz/7990MHz and the wireless communication device with the frequency set to 8050MHz is arranged after the frequency conversion device with the frequency set to 8010MHz/8030MHz, and then sequentially installed in another test vehicle in the above order, or the frequency conversion devices with the set frequencies of 8030 MHz/805090 MHz, 79900mhz, 7950MHz/7970MHz are sequentially installed in one test vehicle, the frequency conversion devices with the set frequencies of 8010 MHz/30mhz, 707990 MHz/7990MHz, and the wireless communication device with the frequency set to 7950MHz is sequentially arranged before the frequency conversion device with the frequency set to 7950MHz, and then the wireless communication device is arranged before the frequency conversion device with the above test vehicle.
In addition, the direction of the antenna of the wireless communication device may be set to be omnidirectional or directional, omnidirectional means that the antenna of the wireless communication device may point to any direction, directional means that the antenna of the wireless communication device points to the direction of another test vehicle, and the direction of the antenna and the vehicle-mounted axis line are kept on the same straight line, in order to improve the accuracy of the subsequent test, in the embodiment of the present invention, the direction of the antenna of the wireless communication device may be set to be directional, i.e., pointing to the direction of another test vehicle.
And 103, the two auxiliary devices perform opposite motion according to a preset rule to obtain the target Doppler frequency shift.
The target Doppler frequency shift is an extended Doppler frequency shift generated based on the target vehicle speed, and the current speeds of the two auxiliary devices are the same.
Further, the two auxiliary devices perform back-and-forth opposite movement of the path according to the frequency conversion times to obtain the target Doppler frequency shift.
In the step 102, 2 test cars move back and forth 5 times in opposite directions from their respective starting positions to the starting position of the other car according to a speed of 120km/h, so that the communication path between the two test cars is increased by the two test cars returning for multiple times at the same speed, an 800km/h high-speed moving scene is constructed, and multiple Doppler shifts (i.e. extended Doppler shifts) under the high-speed moving scene are obtained based on the communication path, and the Doppler shifts are obtained according to a Doppler formula f d = v/λ cos θ, the maximum doppler frequency at the running speed of 800km/h can be obtained
And step 104, the wireless communication equipment obtains a test result by detecting a wireless communication signal transmitted by another wireless communication equipment.
Wherein, the wireless communication equipment obtains the test result by detecting another wireless communication signal transmitted by the wireless communication equipment, and the test result comprises: and under the condition of the obtained target Doppler frequency shift, the wireless communication equipment evaluates the wireless communication capacity by whether a wireless communication signal transmitted by another wireless communication equipment is received, if so, the wireless communication capacity is determined to meet the wireless communication requirement under the target vehicle speed, otherwise, the wireless communication capacity is determined to not meet the wireless communication requirement under the target vehicle speed.
In this step, in combination with step 103, under the condition based on the obtained extended doppler shift, 1 of the 2 wireless communication devices evaluates the wireless communication capability at the current target vehicle speed according to whether a wireless communication signal transmitted by another wireless communication device is received, if the wireless communication signal transmitted by the other wireless communication device is received, the wireless communication requirement under the high-speed mobile operation scene is satisfied, the wireless communication condition is good, if the wireless communication signal continuously transmitted by the other wireless communication device is received, the wireless communication condition is good and stable, if the wireless communication signal continuously transmitted by the other wireless communication device is not received, the wireless communication requirement under the high-speed mobile operation scene is not satisfied, at this time, the wireless communication condition is poor, or if the wireless communication signal continuously transmitted by the other wireless communication device is not received, the wireless communication condition is poor and unstable, so that the test result of this time is obtained based on the reception condition of the wireless signal, and a basis is set for ensuring the subsequent normal operation.
As shown in fig. 2, a flowchart of another wireless communication testing method provided for the embodiment of the present invention is combined with the method steps of fig. 1, after step 103 and before step 104, the method further includes:
and 105, the wireless communication equipment acquires the target Doppler frequency shift error and verifies that the target Doppler frequency shift error does not exceed a threshold value.
In this step, with reference to fig. 1, because the carrier after frequency conversion is different from the original carrier, there is a certain difference in the doppler shift in the actual testing process, and in order to reduce the error of the doppler shift in the actual testing process, it is necessary to ensure that the obtained error of the maximum doppler shift is within 5% (i.e., it is necessary to ensure that BW +2 × fd is within 5%)<1.05 bw) due to maximum doppler shift at an operating speed of 800km/h
By the formula, the extended Doppler frequency shift is verified to meet the error requirement, and the accuracy of the wireless communication test result is further improved by verifying the error of the extended Doppler before testing.
The embodiment of the invention provides a wireless communication test method, which comprises the following steps: respectively configuring target frequencies on frequency conversion equipment and wireless communication equipment, then placing the frequency conversion equipment and the wireless communication equipment in auxiliary equipment according to a preset distribution mode, then enabling the auxiliary equipment to move in opposite directions according to the frequency conversion times so as to obtain extended Doppler frequency shift under a target vehicle speed, finally enabling the wireless communication equipment to obtain a test result by detecting a wireless communication signal transmitted by another wireless communication equipment, solving the problems of high cost, low timeliness and poor flexibility caused by overhigh requirement on the test system for evaluating the adaptability of a wireless communication system under a high-speed mobile environment, evaluating the frequency conversion times required under the high-speed mobile environment by utilizing the operating speed under the high-speed mobile scene (namely the target vehicle speed) and the operating speed of an actual test scene (the current speed of the auxiliary equipment), constructing a frequency conversion processing scheme by combining the frequency conversion times and channel resources of the current wireless communication system, installing the frequency conversion equipment and the wireless communication equipment on the auxiliary equipment according to the design of the frequency conversion processing scheme, enabling the frequency conversion equipment and the wireless communication equipment to be used as path transmission times between the frequency conversion processing scheme under the same speed, and further achieving the purpose of rapidly verifying the Doppler frequency conversion of the wireless communication under the extended Doppler frequency shift environment so as to obtain the wireless communication under the extended Doppler frequency shift. The test platform in the primary stage is provided for the wireless communication environment in the future high-speed or even ultra-high-speed mobile scene.
As shown in fig. 3, a wireless communication testing system 300 according to an embodiment of the present invention includes: a plurality of frequency conversion devices 301, two wireless communication devices 302 and two auxiliary devices 303,
the frequency conversion device 301 and the wireless communication device 302 are respectively configured to obtain a target frequency, where the target frequency is a frequency to be configured and determined based on a frequency conversion frequency required by a target vehicle speed and a current channel resource, where the number of the frequency conversion devices 301 is the same as the frequency conversion frequency, and the frequency conversion frequency is an even number;
the frequency conversion device 301 and the wireless communication device 302 are further configured to be disposed in the two auxiliary devices 303 according to a preset distribution manner;
the two auxiliary devices 303 are configured to perform opposite movement according to a preset rule to obtain a target doppler frequency shift, where the target doppler frequency shift is an extended doppler frequency shift generated based on the target vehicle speed, and the current speeds of the two auxiliary devices 303 are the same;
the wireless communication device 302 is configured to obtain a test result by detecting a wireless communication signal transmitted by another wireless communication device 302.
Further, the frequency conversion device 301 and the wireless communication device 302 are further configured to: and performing ascending or descending order distribution on the two auxiliary devices 303 based on the frequency conversion times and the configured frequency.
Further, the two auxiliary devices 303 are specifically configured to: and carrying out back-and-forth opposite movement of the path according to the frequency conversion times to obtain the Doppler frequency shift of the target.
Further, the wireless communication device 302 is also configured to set the direction of its antenna to be directional.
Further, the wireless communication device 302 is specifically configured to: under the acquired target Doppler frequency shift, evaluating wireless communication capability by whether a wireless communication signal transmitted by another wireless communication device 302 is received, if so, determining that the wireless communication capability meets the requirement of wireless communication at the target vehicle speed, otherwise, determining that the wireless communication capability does not meet the requirement of wireless communication at the target vehicle speed.
Further, the wireless communication device 302 is further configured to: and acquiring the target Doppler frequency shift error, and verifying that the target Doppler frequency shift error does not exceed a threshold value.
As shown in fig. 4, another wireless communication testing system 400 provided in the embodiment of the present invention is combined with the wireless communication testing system shown in fig. 3, where the wireless communication testing system 400 is a testing system when the frequency conversion times are odd.
The implementation principle and the resulting technical effects of the wireless communication test system provided by the embodiment of the present invention are the same as those of the foregoing method embodiments, and for brief description, corresponding contents in the method embodiments of fig. 1 or 2 may be referred to where corresponding product embodiments are not mentioned, and are not described herein again.
The embodiment of the invention provides a wireless communication test system, which comprises: the method comprises the steps that a plurality of frequency conversion devices, two wireless communication devices and two auxiliary devices are respectively configured with target frequencies, then the frequency conversion devices and the wireless communication devices are arranged on the auxiliary devices in a preset distribution mode, then the auxiliary devices move oppositely according to frequency conversion times to obtain extended Doppler frequency shift under a target vehicle speed, finally the wireless communication devices obtain a test result by detecting a wireless communication signal transmitted by the other wireless communication device, the problems of high cost, low timeliness and poor flexibility caused by the fact that the requirement of the adaptability of a wireless communication system on the test system is too high under a high-speed moving environment are solved, and the operating speed under a high-speed moving scene (namely the target vehicle speed) and the operating speed of an actual test scene (auxiliary current speed) are utilized, the frequency conversion equipment and the wireless communication equipment are arranged on auxiliary equipment according to the design of the frequency conversion processing scheme, and the frequency conversion times are used as the path transmission times among the auxiliary equipment, so that the opposite driving of multiple back-and-forth paths is carried out based on the frequency conversion times under the same speed of the auxiliary equipment, the Doppler frequency shift under the scene is improved according to the back-and-forth path times among the auxiliary equipment, so as to obtain the expanded Doppler frequency shift, and the wireless communication capability is evaluated based on the Doppler frequency shift, so that the purpose of testing the influence of the Doppler frequency shift under the high-speed moving scene on the wireless communication is achieved, and the environment adaptability of the wireless communication system in the high-speed moving field can be tested and verified rapidly, the test platform in the primary stage is provided for the wireless communication environment in the future high-speed or even ultra-high-speed mobile scene.
In addition, in the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. A method for wireless communication testing, the method comprising:
the method comprises the steps that frequency conversion equipment and wireless communication equipment respectively obtain target frequencies, wherein the target frequencies are frequency conversion times required based on a target vehicle speed and frequencies required to be configured and determined by current channel resources, the number of the wireless communication equipment is two, and the number of the frequency conversion equipment is the same as the frequency conversion times; the frequency conversion times are calculated by formula
Determining, wherein N represents frequency conversion times, and a value is taken by adopting a further method, vmax represents a preset movement speed of auxiliary equipment, vref represents a target vehicle speed, and the channel resources comprise an original carrier fc, a communication occupied bandwidth BW and a frequency conversion reserved bandwidth 2 × BW; target frequency pass of the wireless communication device
Is determined in which
And
respectively representing target frequencies of two wireless communication devices; the target frequency of the frequency conversion equipment comprises a receiving frequency and a frequency-converted transmitting frequency, and the receiving frequency of the ith I E (1,2,3, a
The transmission frequency of the ith frequency conversion equipment after frequency conversion is determined as
；
Frequency conversion equipment with two supplementary equipment are arranged in according to presetting the distribution mode to wireless communication equipment, include: the frequency conversion equipment and the wireless communication equipment are distributed in the two auxiliary equipment in an ascending order or a descending order based on the frequency conversion times and the configured frequency;
the two auxiliary equipment perform opposite movement according to a preset rule to obtain target Doppler frequency shift, wherein the target Doppler frequency shift is extended Doppler frequency shift generated based on the target vehicle speed, and the current speeds of the two auxiliary equipment are the same;
the wireless communication equipment obtains a test result by detecting a wireless communication signal transmitted by another wireless communication equipment.
2. The wireless communication testing method of claim 1, wherein the two auxiliary devices perform a relative motion according to a preset rule to obtain a target doppler shift, comprising: and the two auxiliary devices carry out back-and-forth opposite movement of the path according to the frequency conversion times to obtain the target Doppler frequency shift.
3. The wireless communication testing method of claim 2, wherein the wireless communication device obtains the testing result by detecting a wireless communication signal transmitted by another wireless communication device, comprising: and under the condition of the obtained target Doppler frequency shift, the wireless communication equipment evaluates the wireless communication capacity by judging whether a wireless communication signal transmitted by another wireless communication equipment is received, if so, the wireless communication capacity is determined to meet the wireless communication requirement under the target vehicle speed, otherwise, the wireless communication capacity is determined not to meet the wireless communication requirement under the target vehicle speed.
4. The wireless communication testing method according to any one of claims 1-3, wherein after the two auxiliary devices perform a relative motion according to a preset rule to obtain a target Doppler shift, before the wireless communication device obtains a testing result by detecting a wireless communication signal transmitted by another wireless communication device, the method further comprises: and the wireless communication equipment acquires the target Doppler frequency shift error and verifies that the target Doppler frequency shift error does not exceed a threshold value.
5. A wireless communication test system, the system comprising: a plurality of frequency conversion devices, two wireless communication devices and two auxiliary devices,
the frequency conversion equipment and the wireless communication equipment are used for acquiring a target frequency, wherein the target frequency is a frequency required to be configured and determined based on frequency conversion times required by a target vehicle speed and current channel resources, and the number of the frequency conversion equipment is the same as that of the frequency conversion times; the frequency conversion times are calculated by formula
Determining, wherein N represents frequency conversion times, and a value is taken by adopting a further method, vmax represents a preset movement speed of auxiliary equipment, vref represents a target vehicle speed, and the channel resources comprise an original carrier fc, a communication occupied bandwidth BW and a frequency conversion reserved bandwidth 2 × BW; target frequency pass of the wireless communication device
Is determined in which
And
respectively representing target frequencies of two wireless communication devices; the target frequency of the frequency conversion equipment comprises a receiving frequency and a frequency-converted transmitting frequency, and the receiving frequency of the ith I E (1,2,3, a
The transmission frequency of the ith frequency conversion equipment after frequency conversion is determined as
；
The frequency conversion equipment and the wireless communication equipment are also used for arranging the two auxiliary equipment in a preset distribution mode, and are specifically used for: distributing the frequency-variable frequency signals to the two auxiliary devices in an ascending order or a descending order based on the frequency-variable frequency times and the configured frequency;
the two auxiliary devices are used for carrying out opposite movement according to a preset rule to obtain target Doppler frequency shift, the target Doppler frequency shift is extended Doppler frequency shift generated based on the target vehicle speed, and the current speeds of the two auxiliary devices are the same;
the wireless communication equipment is also used for obtaining a test result by detecting a wireless communication signal transmitted by another wireless communication equipment.
6. The wireless communication test system of claim 5, wherein the two auxiliary devices are specifically configured to: and carrying out back-and-forth opposite movement of the path according to the frequency conversion times to obtain the Doppler frequency shift of the target.
7. The wireless communication test system of claim 6, wherein the wireless communication device is specifically configured to: and under the condition of the acquired target Doppler frequency shift, evaluating wireless communication capacity by whether a wireless communication signal transmitted by another wireless communication device is received, if so, determining that the wireless communication capacity meets the requirement of wireless communication at the target vehicle speed, otherwise, determining that the wireless communication capacity does not meet the requirement of wireless communication at the target vehicle speed.
8. The wireless communication test system of any of claims 5-7, wherein the wireless communication device is further configured to: and acquiring the target Doppler frequency shift error, and verifying that the target Doppler frequency shift error does not exceed a threshold value.
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