CN111600666A - Wireless communication simulation test system - Google Patents
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- CN111600666A CN111600666A CN202010402303.1A CN202010402303A CN111600666A CN 111600666 A CN111600666 A CN 111600666A CN 202010402303 A CN202010402303 A CN 202010402303A CN 111600666 A CN111600666 A CN 111600666A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/364—Delay profiles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
- H04B17/3912—Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region
Abstract
The invention relates to a wireless communication simulation test system, comprising: the scene simulation device is connected with the scene simulation device and used for being arranged in the shielding box; the multi-path transmission simulation module is used for respectively connecting a wireless measured signal source arranged in a microwave absorption darkroom and a receiving terminal which is arranged in the shielding box and is communicated with the wireless measured signal source; the scene simulation device is used for determining an attenuation value, a phase shift value and signal delay time of the multipath transmission simulation module in a corresponding test scene mode when simulating a corresponding actual network environment according to the acquired real measurement data when the standard wireless signal source and the receiving terminal are transmitted in the corresponding actual network environment; and the scene simulation device is also used for sending the attenuation value, the phase shift value and the signal delay time corresponding to the test scene mode to the multi-path transmission simulation module according to the selected test scene mode. The invention ensures that the test data of the wireless tested signal source is more accurate.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a wireless communication simulation test system.
Background
With the continuous development of wireless communication device technology, most of the test systems for wireless network access devices in the conventional technology cannot meet the standards required by the industry. And the composition of a test system in the traditional technology is not perfect enough, and the difference between the built test environment and the real scene is larger. Therefore, the test system in the conventional technology has low test accuracy on the wireless network access device.
Disclosure of Invention
The invention aims to provide a wireless communication simulation test system aiming at the defects in the prior art.
In one embodiment, the present invention provides a wireless communication simulation test system, comprising: the scene simulation device is connected with the scene simulation device and used for being arranged in the shielding box;
the multi-path transmission simulation module is used for respectively connecting a wireless measured signal source arranged in a microwave absorption darkroom and a receiving terminal which is arranged in the shielding box and is communicated with the wireless measured signal source;
the scene simulation device is used for determining an attenuation value, a phase shift value and signal delay time of the multipath transmission simulation module in a corresponding test scene mode when simulating a corresponding actual network environment according to the acquired real measurement data when the standard wireless signal source and the receiving terminal are transmitted in the corresponding actual network environment;
and the scene simulation device is also used for sending the attenuation value, the phase shift value and the signal delay time corresponding to the test scene mode to the multi-path transmission simulation module according to the selected test scene mode.
In one embodiment, the multipath transmission simulation module comprises a Butler matrix, a connection Butler matrix and an environment simulation module for connecting the receiving terminal; the environment simulation module comprises a program-controlled attenuator, a phase control module and a digital delay module which are connected in series in any sequence;
the Butler matrix is used for connecting the wireless signal source to be tested and simulating different propagation paths of the signal transmitted by the wireless signal source to be tested in the corresponding actual network environment;
the programmable attenuator is used for simulating signal attenuation in a corresponding actual network environment according to the received attenuation value and a signal output by the last module after signal processing;
the phase control module is used for simulating signal phase deviation in a corresponding actual network environment according to the received phase shift value and a signal output after signal processing by the previous module;
and the digital delay module is used for simulating the signal delay in the corresponding actual network environment according to the received signal delay time and the signal output after the signal processing of the last module.
In one embodiment, the butler matrix, the programmable attenuator, the phase control module and the digital delay module are connected in sequence.
In one embodiment, the power divider further comprises a noise source and at least one power divider; the first end of the power divider is connected with a corresponding input end of the environment simulation module, the second end of the power divider is connected with a corresponding output end of the Butler matrix, and the third end of the power divider is connected with the noise source;
the scene simulation device is also used for sending a noise signal corresponding to the test scene mode to the noise source according to the selected test scene mode;
and the power divider is used for synthesizing the noise signal and the signal processed by the Butler matrix into one output signal and transmitting the output signal to the environment simulation module.
In one embodiment, the method further comprises the following steps: the antenna device is used for receiving signals transmitted by the wireless signal source to be tested; the antenna device is connected with the multipath transmission simulation module.
In one embodiment, the system further comprises a first monitoring device;
the first monitoring equipment is used for connecting the wireless signal source to be tested and monitoring data information communicated with the receiving terminal when the wireless signal source to be tested is subjected to analog testing.
In one embodiment, the system further comprises a second monitoring device;
the second monitoring equipment is used for connecting the receiving terminal and monitoring data information when the receiving terminal is communicated with the wireless signal source to be tested for the simulation test.
In one embodiment, the wireless signal source testing device further comprises a rotary table for rotating the wireless signal source to be tested so as to change the placement direction of the wireless signal source to be tested.
In one embodiment, the system further comprises a live acquisition device connected with the scene simulation device and used for transmitting the acquired real measurement data between the standard wireless signal source and the receiving terminal when the real measurement data are transmitted in the corresponding actual network environment to the scene simulation device.
In one embodiment, the multipath transmission simulation module is connected with the wireless signal source to be tested and the receiving terminal through a radio frequency connecting line.
The invention provides a wireless communication simulation test system, which has the following technical effects:
the wireless communication simulation test system comprises a scene simulation device and a multipath transmission simulation module connected with the scene simulation device, wherein the scene simulation device can determine an attenuation value, a phase shift value and a signal delay time of the multipath transmission simulation module acting on a signal transmitted by a wireless tested signal source in a corresponding test scene mode according to the acquired real measurement data transmitted between a standard wireless signal source and a receiving terminal in a corresponding actual network environment. Therefore, each embodiment of the invention can simulate the condition of multiple propagation paths formed by obstacles, different landforms and the like when the signal transmitted by the wireless tested signal source is propagated in the actual network environment based on the multi-path transmission simulation module, so that the test data of the wireless tested signal source is closer to the test data in the actual network environment, thereby saving complex scene construction, having higher stability and data repeatability and utilization rate, and being beneficial to research and development of vulnerability tests.
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FIG. 1 is a schematic diagram of a wireless communication simulation test system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of a wireless communication simulation test system;
FIG. 3 is a schematic diagram of another embodiment of a wireless communication simulation test system;
FIG. 4 is a schematic diagram of another embodiment of a wireless communication simulation test system;
fig. 5 is a schematic diagram showing another structure of the wireless communication simulation test system according to an embodiment of the present invention.
Detailed Description
Various embodiments of the present invention will be described more fully hereinafter. The invention is capable of various embodiments and of modifications and variations therein. However, it should be understood that: there is no intention to limit the scope of the invention to the specific embodiments disclosed herein, but on the contrary, the intention is to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of various embodiments of the invention.
Hereinafter, the terms "includes" or "may include" used in various embodiments of the present invention indicate the presence of the disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to mean that the specified features, numbers, steps, operations, elements, components, or combinations of the foregoing, are only meant to indicate that a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to the possibility of, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the invention, the expression "at least one of a or/and B" includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The term "user" as used in various embodiments of the present invention may indicate a person using an electronic device or a device using an electronic device (e.g., an artificial intelligence electronic device).
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. Terms such as those defined in commonly used dictionaries will be interpreted as having a meaning that is the same as a contextual meaning in the related art and will not be interpreted as having an idealized or overly formal meaning unless expressly so defined herein in various embodiments of the present invention.
Referring to fig. 1, in one embodiment, the present invention provides a wireless communication simulation test system, comprising: the scene simulator 120, the multipath transmission simulation module 110 connected with the scene simulator 120 and arranged in the shielding box b.
And the multipath transmission simulation module 110 is used for respectively connecting a wireless measured signal source 140 arranged in the microwave absorption darkroom a and a receiving terminal 130 arranged in the shielding box b and communicated with the wireless measured signal source 140.
The scene simulator 120 is configured to determine, according to the obtained real measurement data when the standard wireless signal source 140 and the receiving terminal 130 transmit in the corresponding actual network environment, an attenuation value, a phase shift value, and a signal delay time of the multipath transmission simulation module 110 in the test scene mode corresponding to the simulation of the corresponding actual network environment.
The scene simulator 120 is further configured to send the attenuation value, the phase shift value, and the signal delay time corresponding to the test scene mode to the multipath transmission simulation module 110 according to the selected test scene mode.
The scene simulator 120 may be, but is not limited to, a computer as a control host. The wireless signal source 140 is, for example, a wireless signal source device such as a wireless ap (access point), a wireless router, and the like. The standard wireless signal source is a wireless signal source which can be normally used and each functional index meets the standard of industrial products. In an actual network environment, due to the existence of obstacles and differences in ground features, various propagation paths in different directions are formed in the process of a wireless signal from a wireless signal source to a receiving terminal due to direct incidence, reflection, diffraction, wall penetration and the like, and signal attenuation, phase shift, time delay, even Doppler effect and the like are caused. In addition, in an actual network environment, there may be a network environment of high-density wireless user terminals, and the network environment may also be affected by the high-density wireless user terminals, so that the wireless signals reaching the receiving terminal are attenuated, phase-shifted, delayed, and the like. Thus, the real measurement data transmitted between the standard wireless signal source and the receiving terminal 130 in the corresponding actual network environment includes the attenuation value, the phase shift value, and the signal delay time of the signal.
The microwave absorbing dark room a and the shielding box b provide a test environment free of external interference and weak reflection. For example, the weak microwave absorption darkroom is a rectangular microwave darkroom with a standard size (for example, 80cmx120cmx80cm), and further, in order to meet the propagation requirement of the MIMO (Multiple Input Multiple output) signal, wave-absorbing materials with different absorption capacities can be adopted, so that both the effective propagation of the MIMO signal and the reliability of the system and the repeatability of test data are met. The shielding box b has a shielding function, such as an isolation degree greater than 70dB, and can provide a clean testing environment for the testing device or the accompanying device (the receiving terminal 130). The actual network environment may be, for example, a home environment, a hotel environment, a classroom environment, or an office environment. In different actual network environments, the attenuation value, the phase shift value, and the signal delay time of the wireless signal from the wireless signal source 140 to the receiving terminal 130 are different, so that the scene simulation apparatus 120 may determine the attenuation value, the phase shift value, and the signal delay time of the multipath transmission simulation module 110 in the corresponding test scene mode when simulating the corresponding actual network environment according to the obtained real measurement data when transmitting between the standard wireless signal source and the receiving terminal 130 in the corresponding actual network environment. Each test scenario mode corresponds to an actual network environment, and the multi-path transmission simulation module 110 acts on the signal transmitted by the wireless signal source 140 to simulate the signal attenuation, phase shift and signal delay of the signal after the signal propagates through different paths in the corresponding actual network environment and/or reaches the receiving terminal 130 after being interfered by a high-density wireless user terminal, so as to test the wireless signal source 140.
The wireless communication simulation test system comprises a scene simulation device 120 and a multipath transmission simulation module 110 connected with the scene simulation device 120, wherein the scene simulation device 120 can determine an attenuation value, a phase shift value and a signal delay time of the multipath transmission simulation module 110 acting on a signal emitted by a wireless signal source 140 to be tested in a corresponding test scene mode according to the acquired real measurement data transmitted between a standard wireless signal source and a receiving terminal 130 in a corresponding actual network environment. Therefore, the embodiment of the present invention can simulate, based on the multipath transmission simulation module 110, a situation of multiple propagation paths formed by the fact that the signal transmitted by the wireless signal source 140 meets obstacles and different ground features when propagating in an actual network environment, and/or a situation that the signal is influenced by a high-density wireless user terminal in the actual network environment, so that the test data of the wireless signal source 140 to be tested is closer to the test data in the actual network environment, thereby omitting complex scene construction, having high stability and data repeatability utilization rate, and being beneficial to research and development of vulnerability testing.
In a specific embodiment, determining an attenuation value, a phase shift value, and a signal delay time of a multipath transmission simulation module in a test scenario mode when simulating a corresponding actual network environment according to acquired real measurement data transmitted between a standard wireless signal source and a receiving terminal in the corresponding actual network environment includes:
and simulating a network environment according to the acquired real measurement data to obtain a test scene mode corresponding to the simulated corresponding actual network environment, and an attenuation value, a phase shift value and signal delay time corresponding to the test scene mode.
For example, a field simulation model can be used to model a real environment according to real measurement data, and the attenuation value, the phase shift value and the signal delay time of the multipath transmission simulation module are adjusted based on corresponding weights, so that the process of the signal reaching the receiving terminal after undergoing the superposition of attenuation, phase shift and delay from the wireless signal source and the signal parameters are close to or consistent with those in the corresponding actual network environment. The signal parameters include an uplink rate, a downlink rate, and the like. And further, generating a corresponding test scene mode according to the simulated corresponding actual network environment, and determining an attenuation value, a phase shift value and signal delay time of the test scene mode simulating multipath transmission. After determining a certain actual network environment, a corresponding test scene mode can be selected from the scene simulation device, and after the connection between the wireless signal source to be tested and the receiving terminal is established through, for example, an SSID, the multipath transmission simulation module acts on a signal sent by the wireless signal source to be tested according to the selected test scene mode, so that the wireless signal source to be tested is tested.
The wireless communication simulation test system provided by the embodiment of the invention can simulate the propagation process of the spatial wireless signal through software calculation, thereby facilitating the performance test of the product, improving the test efficiency and saving the complex scene construction.
Referring to fig. 2, in a specific embodiment, the multipath transmission simulation module includes a butler matrix 210, an environment simulation module 20 connected to the butler matrix 210 and connected to the receiving terminal 130; the environment simulation module 20 includes a programmable attenuator, a phase control module, and a digital delay module connected in series in any order.
The Butler matrix connection scene simulation device is used for connecting the wireless signal source to be tested and simulating different propagation paths of signals transmitted by the wireless signal source to be tested in corresponding actual network environments.
And the program-controlled attenuator is used for simulating signal attenuation in a corresponding actual network environment according to the received attenuation value and the signal output by the last module after signal processing.
And the phase control module is used for simulating the signal phase offset in the corresponding actual network environment according to the received phase shift value and the signal output by the last module after signal processing.
And the digital delay module is used for simulating the signal delay in the corresponding actual network environment according to the received signal delay time and the signal output after the signal processing of the last module.
The butler matrix has a plurality of input ports and a plurality of output ports, and the phase difference of each adjacent output port is different, so that the signal of each input port can be divided into a plurality of signals with different phase differences for output. The input ports of the Butler matrix are larger than or equal to the number of antennas of the wireless signal source to be tested. For example, the butler matrix is a 4 × 4 butler matrix, and the phase difference of each output port is 0 °, 45 °, 90 °, and 135 °. Therefore, various propagation paths of the wireless measured signal source in the corresponding actual network environment due to direct projection, reflection, diffraction and the like caused by ground features, obstacles and the like can be simulated. The programmable attenuator can be, for example, stepped from 0dB to 100dB by 0.5dB to simulate signal attenuation caused by distance movement, wall penetration, obstacles, etc. in an actual network environment. The phase control module can be a phase shifter or a modulation mode adopting a digital frequency synthesizer, realizes automatic control of the phase, and is used for simulating distortion caused by phase deviation of signals in an actual network environment. The digital delay module can buffer the digital signal through a software algorithm to realize signal delay transmission.
In the embodiment of the invention, the program-controlled attenuator, the phase control module and the digital delay module can be connected in series in any sequence, and the scene simulation device respectively controls the parameters of the modules, so that the modules respectively and sequentially superpose and act on the signals transmitted to the receiving terminal by the wireless signal source to be tested according to the received parameter values, and the process that the signals reach the receiving terminal in the actual network environment is simulated, so that the test data of the wireless signal source to be tested is consistent with the test data in the actual environment or the expected effect is achieved.
The wireless communication simulation test system provided by the embodiment of the invention has the advantages that the structure is well built, the simulation of a test environment close to or consistent with a real actual network environment is facilitated, and the stability and the reusability are high. Further, the test efficiency and the test precision can be improved.
For example, for a common home environment in an actual network environment, a normally used wireless measured signal source is placed in a living room as a standard wireless measured signal source, a receiving terminal of a user is in a room and can equivalently mean that a signal passes through two walls from the standard wireless measured signal source to the receiving terminal, so that signal attenuation, phase shift, delay, signal-to-noise ratio and the like of the signal from the standard wireless measured signal source to the receiving terminal are obtained, a field simulation model is used for modeling the network environment and the simulation truth is improved through parameter optimization adjustment, so that a corresponding test scene mode is obtained, and an attenuation value, a phase shift value and signal delay time corresponding to the test scene mode are determined. Further, the standard wireless signal source is placed in a microwave absorption darkroom a of a laboratory, the receiving terminal is placed in a shielding box, and if the signal parameters of the signal of the standard wireless signal source received by the receiving terminal are consistent with or expected to the signal parameters of the corresponding actual network environment, the testing environment in the corresponding testing scene mode is considered to be equivalent to the actual network environment.
Referring to fig. 3, in one embodiment, butler matrix 210, programmable attenuator 220, phase control module 230, and digital delay module 240 are connected in series.
In the wireless communication analog test system according to the embodiment of the present invention, the butler matrix 210 is respectively connected to the wireless signal source to be tested 140 and the programmable attenuator 220, the phase control module 230, and the digital delay module 240 are sequentially connected. In the signal transmission and propagation process, the attenuation occupies a larger weight, and the weights of phase shift, time delay and the like caused by multipath effects caused by reflection, diffraction and the like are smaller, so that the connection mode of the modules in the embodiment of the invention is favorable for further enabling the simulated network environment to be closer to the actual network environment, and improving the test precision of the wireless signal source to be tested.
Referring to fig. 4, in a specific embodiment, the power divider further includes a noise source 250 and a plurality of power dividers 260; a first end of the power divider 260 is connected to a corresponding input end of the environmental simulation module 20, a second end of the power divider 260 is connected to a corresponding output end of the butler matrix 210, and a third end of the power divider 260 is connected to the noise source 250.
The scene simulator 120 is further configured to send a noise signal corresponding to the test scene pattern to the noise source 250 according to the selected test scene pattern.
The power divider 260 is configured to combine the noise signal and the signal processed by the butler matrix into one output signal and transmit the output signal to the environment simulation module 20.
There are other signal source influencing factors in the actual network environment, so that the simulated noise signal can be input to the power divider 260 by simulating the corresponding actual noise signal according to the selected test scene mode by the scene simulation apparatus. So that the power divider 260 combines the noise signal and the signal processed by the butler matrix into one path to be output and input to the environment simulation module 20. The noise source 250 can output white gaussian noise, and the noise gain coefficient is controllable.
The wireless communication simulation test system provided by the embodiment of the invention has a more perfect composition structure, the noise source can superpose interference noise on the system, various interference signals in a real environment are simulated, and the simulation of the test environment which is closer to or consistent with a real actual network environment is facilitated, so that the test data of a wireless tested signal source is closer to the test data in the actual network environment, the complex scene construction can be omitted, the stability and the data repeatability utilization rate are higher, and the system is also beneficial to research and development of vulnerability tests.
Referring to fig. 5, in a specific embodiment, the method further includes: an antenna device 550 for receiving the signal transmitted by the wireless signal source under test 140; the antenna device 550 is connected to the multipath propagation simulation module 110.
The antenna device 550 may be a single antenna or a multi-dimensional antenna array according to the number of antennas of the wireless signal source 140, for example, if the number of the transmitting and receiving antennas of the wireless signal source 140 is 4, the antenna device 550 may be a 4 × 4 antenna array or a 4 × 1 antenna array.
In the wireless communication simulation test system according to the embodiment of the present invention, the multipath transmission simulation module 110 receives the signal transmitted by the wireless signal source 140 to be tested through the antenna device 550, and plays a role in stable signal transmission. Further, the antenna device 550 can make the signal of the anechoic chamber a be uniformly distributed, reduce the influence on the accuracy of the test data, and improve the test precision.
Referring to FIG. 5, in one particular embodiment, a first monitoring device 510 is also included.
The first monitoring device 510 is used for connecting the wireless signal source under test 140 and monitoring data information communicated with the receiving terminal 130 when the wireless signal source under test 140 is subjected to analog testing.
The data information communicated with the receiving terminal 130 when the wireless signal source under test 140 performs the analog test includes: the signal strength of the signal transmitted by the wireless signal source 140 to be tested, and the communication data such as the uplink rate and the downlink rate. The first monitoring device 510 may be a computer, among others.
The wireless communication simulation test system of the embodiment of the invention has a perfect composition structure, and can acquire and observe the communication data of the wireless tested signal source 140 in real time through the first monitoring equipment 510, thereby being capable of mastering the change in the test process, being convenient for operation and being beneficial to improving the test efficiency.
Referring to FIG. 5, in one particular embodiment, a second monitoring device 520 is also included.
The second monitoring device 520 is used for connecting the receiving terminal 130 and monitoring data information when the receiving terminal 130 communicates with the wireless signal source under test 140 for analog test.
The data information for monitoring the communication between the receiving terminal 130 and the wireless signal source under test 140 for analog test includes: the receiving terminal 130 receives the signal strength of the signal transmitted by the wireless signal source to be tested 140, and the communication data such as the uplink rate and the downlink rate. The first monitoring device 510 may be a computer, among others.
The wireless communication simulation test system of the embodiment of the invention has a perfect composition structure, and can acquire and observe the communication data of the receiving terminal 130 in real time through the second monitoring device 520, thereby being capable of mastering the change in the test process, being convenient for operation and being beneficial to improving the test efficiency.
Referring to fig. 5, in a specific embodiment, a turntable 540 for rotating the wireless signal source 140 to change the placement direction of the wireless signal source 140 is further included.
In the wireless communication simulation test system according to the embodiment of the present invention, the turntable 540 may, for example, rotate freely by 360 degrees to change the placement direction of the wireless signal source 140 to simulate the situation that the wireless signal source 140 is converted in the actual network environment. The embodiment of the invention can sufficiently simulate the azimuth change of the tested wireless signal source 140 in the actual network environment, so that the testing environment is closer to or consistent with the actual situation.
Referring to fig. 5, in a specific embodiment, a live capture device 560 connected to the scene simulation device is further included, for transmitting the captured real measurement data between the standard wireless signal source and the receiving terminal 130 in the corresponding actual network environment to the scene simulation device 120.
In the wireless communication simulation system according to the embodiment of the present invention, the live acquisition device 560 may acquire real measurement data during transmission between the standard wireless signal source and the receiving terminal 130 in the corresponding actual network environment, such as signal attenuation, phase shift, and delay time during the process that a signal transmitted by the standard wireless signal source reaches the receiving terminal 130, so as to be used by the scene simulation device 120 to perform network environment modeling, so that the multipath transmission simulation module 110 may simulate a test environment similar to or consistent with the corresponding actual network environment. Meanwhile, complex scene construction can be omitted, and the intelligent degree is high.
In a specific embodiment, the multipath transmission module is connected with the wireless signal source to be tested and the receiving terminal through a radio frequency connecting line.
According to the wireless communication simulation test system provided by the embodiment of the invention, the multipath transmission simulation module is connected with the wireless tested signal source and the receiving terminal through the radio frequency connecting line, so that the signal transmission stability can be ensured, and the reliability of the test system is improved.
Those skilled in the art will appreciate that the figures are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The above-mentioned invention numbers are merely for description and do not represent the merits of the implementation scenarios. The above disclosure is only a few specific implementation scenarios of the present invention, however, the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (10)
1. A wireless communication simulation test system, comprising: the system comprises a scene simulation device and a multi-path transmission simulation module which is connected with the scene simulation device and is arranged in a shielding box;
the multipath transmission simulation module is used for being respectively connected with a wireless tested signal source arranged in a microwave absorption darkroom and a receiving terminal which is arranged in the shielding box and is communicated with the wireless tested signal source;
the scene simulation device is used for determining an attenuation value, a phase shift value and signal delay time of the multipath transmission simulation module in a corresponding test scene mode when simulating a corresponding actual network environment according to the acquired real measurement data when the standard wireless signal source and the receiving terminal are transmitted in the corresponding actual network environment;
the scene simulation device is further configured to send an attenuation value, a phase shift value, and a signal delay time corresponding to the test scene mode to the multipath transmission simulation module according to the selected test scene mode.
2. The wireless communication simulation test system according to claim 1, wherein the multipath transmission simulation module comprises a butler matrix, an environment simulation module connected to the butler matrix and configured to be connected to the receiving terminal; the environment simulation module comprises a program-controlled attenuator, a phase control module and a digital delay module which are connected in series in any sequence;
the Butler matrix is used for connecting the wireless signal source to be tested and simulating different propagation paths of signals transmitted by the wireless signal source to be tested in the corresponding actual network environment;
the program-controlled attenuator is used for simulating signal attenuation in the corresponding actual network environment according to the received attenuation value and a signal output by the last module after signal processing;
the phase control module is used for simulating signal phase deviation in the corresponding actual network environment according to the received phase shift value and a signal output after signal processing by the previous module;
and the digital delay module is used for simulating the signal delay in the corresponding actual network environment according to the received signal delay time and the signal output after the signal processing of the last module.
3. The wireless communication analog test system of claim 2, wherein the butler matrix, the programmable attenuator, the phase control module, and the digital delay module are connected in sequence.
4. The wireless communication simulation test system of claim 2, further comprising a noise source and at least one power divider; a first end of the power divider is connected with a corresponding input end of the environment simulation module, a second end of the power divider is connected with a corresponding output end of the butler matrix, and a third end of the power divider is connected with the noise source;
the scene simulation device is further configured to send a noise signal corresponding to the test scene mode to the noise source according to the selected test scene mode;
and the power divider is used for synthesizing the noise signal and the signal processed by the Butler matrix into one output signal and transmitting the output signal to the environment simulation module.
5. The wireless communication simulation test system of claim 1, further comprising: the antenna device is used for receiving the signal transmitted by the wireless signal source to be tested; the antenna device is connected with the multipath transmission simulation module.
6. The wireless communication simulation test system of claim 1, further comprising a first monitoring device;
the first monitoring equipment is used for connecting the wireless signal source to be tested and monitoring data information communicated with the receiving terminal when the wireless signal source to be tested is subjected to analog testing.
7. The wireless communication simulation test system of claim 1, further comprising a second monitoring device;
the second monitoring equipment is used for connecting the receiving terminal and monitoring data information when the receiving terminal is communicated with the wireless tested signal source for carrying out the simulation test.
8. The wireless communication simulation test system of claim 1, further comprising a turntable for rotating the wireless signal source under test to change the placement direction of the wireless signal source under test.
9. The wireless communication simulation test system according to claim 1, further comprising a live acquisition device connected to the scene simulation device, for transmitting the acquired real measurement data between the standard wireless signal source and the receiving terminal when transmitted in the corresponding actual network environment to the scene simulation device.
10. The wireless communication simulation test system according to any one of claims 1 to 9, wherein the multi-path transmission simulation module connects the wireless signal source to be tested and the receiving terminal through a radio frequency connection line.
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