WO2018082180A1 - 无线终端接收性能的测试方法及系统 - Google Patents

无线终端接收性能的测试方法及系统 Download PDF

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Publication number
WO2018082180A1
WO2018082180A1 PCT/CN2016/112954 CN2016112954W WO2018082180A1 WO 2018082180 A1 WO2018082180 A1 WO 2018082180A1 CN 2016112954 W CN2016112954 W CN 2016112954W WO 2018082180 A1 WO2018082180 A1 WO 2018082180A1
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Prior art keywords
wireless
wireless terminal
signal
test
test position
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PCT/CN2016/112954
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English (en)
French (fr)
Inventor
吴敏
韦泽垠
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深圳Tcl新技术有限公司
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Publication of WO2018082180A1 publication Critical patent/WO2018082180A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B17/00Monitoring; Testing
    • H04B17/20Monitoring; Testing of receivers
    • H04B17/29Performance testing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B17/00Monitoring; Testing
    • H04B17/30Monitoring; Testing of propagation channels
    • H04B17/309Measuring or estimating channel quality parameters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B17/00Monitoring; Testing
    • H04B17/30Monitoring; Testing of propagation channels
    • H04B17/391Modelling the propagation channel
    • H04B17/3912Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region

Definitions

  • the present invention relates to the field of radio frequency testing technologies, and in particular, to a method and system for testing radio terminal receiving performance.
  • wireless products and wireless applications are emerging in people's field of vision, such as WiFi, Bluetooth Bluetooth, Zigbee module, NFC (Near Near Field Communication). Field Communication).
  • WiFi the most popular wireless technology in this era of communication is getting closer and closer to our lives.
  • wireless LAN devices wireless router (WiFi Router), wireless AP (WiFi Access Point), bridge (Network) Bridge), etc.; various smart terminal devices (WiFi STAs) that need to be connected to wireless LAN communication: smart TV Smart TV, smart TV box TV box, mobile phone mobile Phone, tablet Tablet PC, notebook notebook, etc.
  • WiFi wireless local area network
  • the module does a separate hardware performance test (as defined by WiFi or 802.11 theory), such as basic parameters: operating frequency range, transmit power, transmit signal spectrum, frequency error, error vector magnitude, spurious emissions, receive sensitivity, receive maximum input signal Level, adjacent channel suppression, etc.
  • This test is the most basic process to ensure the performance of the WiFi module's basic hardware. The general supplier will strictly test it. Then it will do the test of wireless throughput reflecting the data communication capability of WiFi software and hardware. This test is also necessary, because the hardware measurement of the WiFi module itself cannot reflect the overall WiFi performance.
  • the use of the WiFi module requires the loading of the overall system, such as Firmware, WiFi driver, WiFi upper layer configuration and application used inside the WiFi module.
  • WiFi transmitting devices such as WiFi
  • WiFi Forced attenuation on the radio side of Router
  • RSSIR Receiveived Signal Strength
  • the indication of the signal strength received by the indication, the optional part of the wireless transmission layer, used to determine the link quality, and whether to increase the broadcast transmission strength) is generally about -70dbm], and measure the maximum received data rate.
  • the independent module hardware basic parameter qualification test and the data throughput simulation test through the WiFi software and hardware layer it is basically possible to ensure that the WiFi experience has no major risk problem, but there are still many WiFi related problems on the market.
  • the main problem is that the existing tests are basically carried out in a closed environment, and the WiFi usage scenarios are all carried out under various open environments (home, office, outdoor street, etc.) for WiFi.
  • the STA receiving product, the wireless signal it receives, will be interfered. Due to the difference between the test environment and the use environment, the accuracy of the test is directly low.
  • the main object of the present invention is to provide a test method and device for receiving performance of a wireless terminal, which aims to truly simulate WiFi.
  • the use environment improves the accuracy of the wireless terminal receiving performance test.
  • a testing method for receiving performance of a wireless terminal includes the following steps:
  • the wireless routing end or the wireless access node that forwards the wireless signal is respectively placed in the strong signal test position, the middle signal test position, and the weak signal test position in the open environment;
  • the wireless terminal When the wireless terminal receives the signal forwarded by the wireless routing end or the wireless access node, measuring the maximum received data rate of the wireless terminal when the wireless routing end is located at the current test location;
  • the wireless router or the wireless access node When the wireless router or the wireless access node is located at the strong signal test position, the medium signal test position, and the weak signal test position, the maximum received data rate of the wireless terminal is greater than the preset qualified quantitative value corresponding to the test position, and the wireless terminal is determined to be qualified. Otherwise, it is determined that the wireless terminal is unqualified.
  • the step of placing the wireless routing end or the wireless access node that forwards the wireless signal before the step of the strong signal test position, the medium signal test position, and the weak signal test position in the open environment respectively includes:
  • a strong signal test position, a medium signal test position, and a weak signal test position are determined based on the measured maximum received data rate of the wireless terminal at the transmitter at the candidate test location.
  • the open environment can satisfy linear distance attenuation, obstacle attenuation, and multipath effects of wireless signals.
  • the step of placing the wireless terminal to be side at the preset position of the preset open environment includes:
  • the open space is determined to be an open environment.
  • the preset qualified quantitative value is 70% of the measured data of the qualified product at the current test position.
  • the present invention further provides a test system for receiving performance of a wireless terminal, including:
  • a wireless throughput test module configured between the wireless routing end and the wireless terminal, or between the wireless access node and the wireless terminal; used to measure a wireless signal or a wireless access node placed in a strong signal Maximum received data rate of the wireless terminal at the preset position when the test position, the weak signal test position, and the medium test position are selected; the strong signal test position, the medium signal test position, the weak signal test The location and preset location are located in an open environment;
  • the first determining module is configured to determine that the wireless terminal is qualified when the maximum received data rate of the wireless terminal is greater than the qualified quantitative value corresponding to the test location; otherwise, determining that the wireless terminal is unqualified.
  • the test system for receiving performance of the wireless terminal further includes a location determining module, where the location determining module includes:
  • selecting a module configured to select candidate test locations of the open environment according to three attenuation factors in the signal attenuation model
  • a location testing module configured to measure a maximum received data rate of the wireless terminal at a transmitting end at the candidate test location
  • the first determining module is configured to determine a strong signal test position, a medium signal test position, and a weak signal test position according to the measured maximum received data rate of the wireless terminal at the transmit end of the candidate test position.
  • the open environment can satisfy linear distance attenuation, obstacle attenuation, and multipath effect of the wireless signal.
  • the test system for receiving performance of the wireless terminal further includes an environment confirmation module, where the environment confirmation module includes:
  • a second determining module configured to determine whether a line of sight of the open space is within a preset range, and whether there are multiple rooms in the open space
  • a viewing module configured to view a spectrum of the WiFi signal occupied by the set frequency band when the viewing distance of the open space is within a preset range, and when there are multiple rooms in the open space;
  • the second determining module is configured to determine that the open space is an open environment when the number of received signals is not received or the number of received signals is lower than a preset number.
  • the preset qualified quantitative value is 70% of the measured data of the qualified product at the current testing position.
  • the technical solution of the present invention first selects an open environment, then selects a preset position in an open environment, and places the wireless terminal fixedly; selects a strong signal test position, a weak signal test position, and a medium signal test position in an open environment.
  • a wireless router or a wireless access node wherein when the wireless router or the wireless access node is placed in a strong signal test position, the wireless router or the wireless access node and the wireless terminal are wirelessly linked, and the wireless terminal receives the wireless terminal.
  • the signals forwarded by the wireless routing end or the wireless access node are mainly attenuated by the linear distance, and the signal strength and quality are high.
  • the wireless throughput test module is used to test the receiving performance of the wireless terminal under strong signal state; the wireless routing end or wireless access When the node is placed in the weak signal test position, the signal received by the wireless terminal via the wireless routing end or the wireless access node is mainly attenuated by the obstacle, and the signal strength and quality are low, and the wireless terminal is tested by the wireless throughput test module.
  • the module tests the receiving performance of the wireless terminal in the medium signal state; since the open test environment is closer to the use environment of the wireless terminal product, the wireless signal received by the wireless terminal product is interfered during the testing process and interfered during use.
  • the above method can truly simulate the use environment of the WiFi and improve the accuracy of the wireless terminal receiving performance test.
  • FIG. 1 is a schematic flowchart of a first embodiment of a method for testing reception performance of a wireless terminal according to the present invention
  • FIG. 2 is an arrangement of an open environment and a test location in a first embodiment of a test method for receiving performance of a wireless terminal according to the present invention
  • FIG. 3 is a schematic diagram of a connection between a data transmitting end, a radio frequency end, and a wireless terminal in a first embodiment of a method for testing a receiving performance of a wireless terminal according to the present invention
  • FIG. 4 is a schematic flowchart diagram of a second embodiment of a method for testing reception performance of a wireless terminal according to the present invention.
  • FIG. 5 is a schematic flowchart of a third embodiment of a method for testing reception performance of a wireless terminal according to the present invention.
  • FIG. 6 is a schematic diagram of functional modules of a first embodiment of a test system for receiving performance of a wireless terminal according to the present invention
  • FIG. 7 is a schematic diagram of a refinement function module of a location determining module in a second embodiment of a test system for receiving performance of a wireless terminal according to the present invention
  • FIG. 8 is a schematic diagram of a refinement function module of an environment determining module in a third embodiment of a test system for receiving performance of a wireless terminal according to the present invention.
  • the present invention provides a test method for receiving performance of a wireless terminal.
  • the method includes the following steps:
  • Step S40 placing a wireless terminal to be tested at a preset position of a preset open environment
  • This space is a comprehensive ideal environment that fully satisfies wireless signal linear distance attenuation, obstacle attenuation and multipath effect test; this space can also contain multiple smaller spaces; closer
  • the actual use environment family house, office, shop, etc. selects a fixed location as a preset location in a preset open environment, and places the wireless terminal at the preset location.
  • Step S80 The wireless routing end or the wireless access node that forwards the wireless signal is respectively placed in the strong signal test position, the middle signal test position, and the weak signal test position in the open environment;
  • the linear distance between the preset position and the strong signal test position is between 3.5 and 4.5 meters; two walls are arranged between the preset position and the weak signal test position, and the preset position is strong. a connection between the signal test positions passes through the two walls; a wall is disposed between the preset position and the middle signal test position, and a connection between the preset position and the middle signal test position passes through the Wall; the distance between the signal test position and the wall is greater than 3.5 meters.
  • the wireless signal between the preset position and the strong signal test position travels straight, and the WiFi STA receives the signal mainly by WiFi.
  • the electromagnetic wave energy remaining after the linear distance attenuation forwarded by the router is less due to the linear distance attenuation, and is used for WiFi.
  • the residual electromagnetic wave energy transmitted by the router through the wall is attenuated due to the obstacle crossing, and can be used for WiFi.
  • Quantitative evaluation test of STA in weak signal receiving state wireless signal propagation between preset position and medium signal test position neutralizes the above two cases, the wireless signal has obstacles in the direction of linear propagation, but the obstacle does not reach Degree or thickness of obstacle crossing; WiFi
  • the received signal of the STA is mainly superimposed by the multipath reflection forwarded by the WiFi router, and can be used for WiFi.
  • the STA's quantitative evaluation test in the medium signal state can be tested using the preset position and the medium signal test position.
  • Figure 2 is an optional space home structure that satisfies the condition, in which the solid line is the wall, the dotted line is the glass, and the dotted line is the door, wherein the preset position 1 is located in the living room, WiFi STA is fixedly placed in preset position 1, strong signal test position 2 is selected in the living room within 4 meters from the preset position 1; weak signal test position 3 is selected in the master bedroom separated from the living room by two walls,
  • the signal test position 4 can be selected to be located in the second bedroom that is diagonally opposite the living room door, and can also be selected in a hollow room that is separated from the living room by a wall.
  • the wireless routing end (WiFi) Router) is described in detail as an example.
  • the wireless router has its own location selection in no order.
  • the wireless router can be placed in the strong signal test position, the medium signal test position, and the weak signal test position.
  • the wireless routers can be placed in the strong signal test position in turn, weak.
  • Signal test position, medium signal test position can also be placed in the weak signal test position, the medium signal test position, and the strong signal test position.
  • the wireless terminal can be a smart TV, a smart TV box, a mobile phone, a tablet or a notebook.
  • Step S90 when the wireless terminal receives the signal forwarded by the wireless routing end or the wireless access node, measuring the maximum receiving data rate of the wireless terminal when the wireless routing end is located at the current test location;
  • a wireless throughput test architecture (ie, a wireless throughput test module) is set up between the routers, and the Ixchairot/Endpoint throughput test software is utilized.
  • the wireless AP (corresponding to the wireless routing end 30) corresponds to the strong signal test position 2 (refer to point A in FIG. 2), the weak signal test position 3 (refer to point B in FIG. 2), and the middle signal test position. 4 (refer to point C, point D, point E in Figure 2), the signal position of PC2, equivalent to WiFi STA, Wireless Card accesses PC2 (equivalent to wireless terminal 20) through usb.
  • PC1 acts as the transmitting end of the data, and is forwarded by the wireless AP, and then transmitted to PC2 through WiFi.
  • the WiFi can be measured through this architecture.
  • the STA corresponds to the maximum accepted data rate (Mbps) at the A, B, C, D, and E points corresponding to various signal qualities (the RSSI can be used as one of the reference factors).
  • step S100 when the wireless router or the wireless access node is located at the strong signal test position, the medium signal test position, and the weak signal test position, the maximum received data rate of the wireless terminal is greater than the preset qualified quantitative value corresponding to the test position, and the wireless is determined.
  • the terminal is qualified; otherwise, the wireless terminal is determined to be unqualified.
  • the STA records the received signal strength RSSI value when the wireless AP5 is at the A, B, C, D, and E points.
  • the WiFi is detected.
  • the wireless terminal When the maximum received data rate of the wireless terminal is greater than the qualified quantitative value of the current test location standard data, it is determined that the wireless terminal is qualified, otherwise, the wireless terminal is determined to be unqualified.
  • the qualified quantitative value of the current test position standard data can be set according to the measurement data of the qualified product. For example, if the strong signal test position is selected as the current position, the test is the reception performance of the wireless terminal product after the attenuation is mainly caused by the linear distance, and the reception is performed.
  • the measurement data needs to be compared with the qualified quantitative value of the standard data under the strong signal state (corresponding to the qualified quantitative value of the standard data after the linear distance attenuation), and when the received measurement data is larger than the qualified quantitative value of the current test position standard data, the determination is performed.
  • the wireless terminal is qualified, otherwise, the wireless terminal is determined to be unqualified.
  • the technical solution of the present invention first selects an open environment that satisfies the test requirements, and then selects a preset position 1 in an open environment, and places the wireless terminal fixedly; selects a strong signal test position 2, a weak signal test position 3, and Signal test position 4, for placing a wireless routing end or a wireless access node, wherein when the wireless routing end or the wireless access node is placed in the strong signal test position 2, between the wireless routing end and the wireless terminal or between the wireless access node and the wireless terminal.
  • the wireless link at this time, the wireless signal received by the wireless terminal and transmitted by the wireless routing end or the wireless access node is mainly attenuated by the linear distance, and the signal strength and quality are high, and the wireless terminal is tested by the wireless throughput test module under the strong signal state.
  • the wireless signal received by the wireless terminal and transmitted by the wireless routing end or the wireless access node is mainly attenuated by the obstacle, and the signal strength and quality are low.
  • the wireless terminal test module is used to test the receiving performance of the wireless terminal in the middle signal state; since the open test environment is closer to the use environment of the wireless terminal product, the wireless signal received by the wireless terminal product is in the test process.
  • the interference received is roughly equivalent to the interference encountered during use, so the WiFi can be simulated realistically by the above method.
  • the use environment improves the accuracy of the wireless terminal receiving performance test.
  • the method includes:
  • Step S50 selecting candidate test positions of the open environment according to three attenuation factors in the signal attenuation model
  • Point A will be used as a strong signal test point for WiFi hotspots. It can also be fully explained from the WiFi signal propagation theory. Point A is a linear signal transmission model with line-of-sight range, and the linear distance is about 4 meters.
  • Point B will serve as a weak signal test point for WiFi hotspots, and the WiFi signal propagation theory can also be fully explained.
  • the signal received by the STA is mainly from the energy remaining after transmitting the wireless electromagnetic wave through the two walls, and the residual energy will be weak after the attenuation;
  • Point C, D, and E will be used as WiFi hotspots for medium signal test points.
  • the WiFi signal propagation theory can also be fully explained.
  • the signal received by the STA comes in part from the energy after penetrating a wall, mostly from the superimposed signal of multipath transmission.
  • the three points A, B, and C completely cover the strong, medium, and weak state of the transmitted signal, and can cover most of the outdoor environment's normal communication state.
  • Step S60 establishing a wireless throughput test architecture between the wireless terminal and the wireless routing end, or between the wireless terminal and the wireless access node, to measure the transmission of the wireless terminal at the candidate test location The maximum received data rate under the terminal;
  • the WiFi signal of the 2.4G frequency band and the 5G frequency band is selected, and the WiFi scanning software can be used to obtain and view the spectrum of the 2.4G frequency band WiFi signal and the 5G frequency band WiFi signal. Use status;
  • the surrounding WiFi environment has no interference or less interference.
  • the RSSI is -80dbm, and the transmitting signal is relatively weak, and the transmitting point is weak (RSSI is less than -70dbm).
  • RSSI Service Set Identifier
  • SSID Service Set Identifier, hereinafter referred to as SSID, is a general concept that includes ESSID and BSSID to distinguish different networks. Wireless network cards can be set to enter different networks by setting different SSIDs.
  • the SSIDs are usually broadcast by APs and are provided by XP.
  • the scan function can view the SSID in the current area. For security reasons, the SSID may not be broadcast. In this case, the user must manually set the SSID to enter the corresponding network. Simply put, the SSID is the name of a LAN. Only computers set to the same SSID value can communicate with each other.
  • the R7000-2.4G hotspot is the WiFi that will be selected in the model.
  • the 2.4G signal of the Router so the entire 2.4G band has only one SSID with strong SSID, indicating that the WiFi environment is an open space with very small interference. It can be obtained from the channel occupancy distribution of the 5G band WiFi hotspot.
  • the 5G band has only one hotspot signal with the SSID of R7000-5G, which is also the WiFi to be selected in the model.
  • the 5G signal of the Router indicates that there is no interference signal in this environment.
  • Step S70 determining a strong signal test position 2, a medium signal test position 4, and a weak signal test position 3 according to the measured maximum received data rate of the wireless terminal at the transmitting end of the candidate test position.
  • the RSSI is -80dbm, and the transmission signals are relatively weak.
  • the interference is small and negligible.
  • the SSID is the hotspot of R7000-2.4G. WiFi to be selected in the model
  • the 2.4G signal of the Router has only one strong signal with a SSID of zxy in the entire 2.4G band. It can be obtained from the channel occupancy distribution of the 5G band WiFi hotspot.
  • the 5G band has only one hotspot signal with the SSID of R7000-5G, which is also the WiFi to be selected in the model. 5G signal of the Router.
  • Table 1 Measurement data of wireless terminals at points A, B, C, D, and E TP Standard (Mbps) 2.4 (CH 11) 5G (CH 161) RSSI(dbm) TP (Mbps) RSSI(dbm) TP (Mbps) A -62 163 -53 220 B -72 68 -75 40 C -69 85 -66 90 D -76 87 -72 60 E -65 140 -58 200
  • step S40 the method further includes:
  • Step S10 determining whether the line of sight of the open space is within a preset range, and whether there are multiple rooms in the open space;
  • the line of sight of the selected space usually needs to meet 15 meters. It can be measured by the distance measuring sensor and combined with the judgment program in the software. There are more than three rooms in the open space, which can be completed by the camera and the judgment program. At the same time, the above conditions are satisfied, and the following steps are performed, which is similar to the real environment, and the test accuracy is higher;
  • Step S20 if yes, checking the usage status of the spectrum occupied by the WiFi signal in the set frequency band;
  • Step S30 when the number of received signals is not received or the number of received signals is lower than a preset number, the open space is determined to be an open environment.
  • wireless signals are more attenuated in open environments than in closed environments; second, in open environments, for WiFi.
  • the STA receiving product the received wireless signal is more susceptible to interference; for example, when there is a room in the open space, the wireless signal needs to cross the obstacle during the propagation process, and the attenuation is more severe than when there is no room; therefore, Set a preset number or a preset number range, and determine that the open space is an open environment when the number of received signals is lower than a preset number range.
  • the qualified quantitative value of the current test position standard data is 70% of the measured data of the qualified product at the current test position.
  • the potential interference of the hardware and software of the STA device can reduce the throughput data, that is, the measurement data loss by 30% as the qualified value of the standard data, and all the WiFi to be tested are required.
  • the STA device performs sexual energy measurement in this model, it cannot be lower than the qualified quantitative value. Otherwise, it is recorded as unqualified, indicating that it is necessary to further rectify the software and hardware of its WiFi.
  • the qualified quantitative standard value only needs to take the throughput TP (throughput), as shown in Table 1 and Table 2.
  • Table 2 Measurement data corresponding to three signal strengths and qualities TP Standard (Mbps) 2.4G 5G A (strong signal) 100 160 B (weak signal) 40 25 C (medium signal) 60 60
  • the present invention further provides a test system for receiving performance of a wireless terminal.
  • a test system for receiving performance of a wireless terminal Referring to FIG. 3 and FIG. 6, in an embodiment, corresponding to the first embodiment of the test method for receiving performance of the wireless terminal, the wireless terminal provided by the present invention receives
  • the performance test system includes a wireless throughput test module 40 and a first decision module 50.
  • the wireless throughput test module 40 is built between the wireless routing end 30 and the wireless terminal 20, or between the wireless access node and the wireless terminal 20; used to measure the wireless routing end 30 or the wireless access node placed in the strong signal test Maximum received data rate of the wireless terminal 20 at the preset position when the selected one of the position, the weak signal test position and the medium signal test position is selected; the strong signal test position, the medium signal test position, the weak signal test The location and preset location are located in an open environment;
  • the open environment can satisfy the linear distance attenuation, obstacle attenuation and multipath effect of the wireless signal; wherein the preset position and the strong signal test position satisfy the requirement of the wireless terminal receiving performance of the test transmission signal in the linear distance attenuation state, Between the preset position and the weak signal test position, the requirement of the wireless terminal receiving performance of the test transmitting signal in the state of penetrating obstacle attenuation is satisfied, and the test signal is satisfied between the preset position and the middle signal test position in the multipath effect The requirement of the wireless terminal receiving performance in the fading state; wherein the preset position and the strong signal test position satisfy the requirement of the wireless terminal receiving performance of the test transmitting signal in the linear distance attenuation state, the preset position and the weak signal testing position The requirement of the wireless terminal receiving performance of the test transmitting signal in the state of penetrating obstacle attenuation is satisfied, and the requirement of the wireless terminal receiving performance of the test transmitting signal in the multipath effect attenuation state is satisfied between the preset position and the middle signal
  • the linear distance between the preset position and the strong signal test position is between 3.5 and 4.5 meters; in the embodiment of the present invention; Between the position and the weak signal test position, two walls are disposed, and a connection between the preset position and the strong signal test position passes through the two walls; the preset position and the middle signal A wall is disposed between the test positions, and a line between the preset position and the middle signal test position passes through the wall; a distance between the middle signal test position and the wall is greater than 3.5 meters.
  • the test position between the preset position and the strong signal test position is satisfied.
  • the WiFi STA receives the signal mainly from WiFi. Straight-line propagation of the transmitted signal of the Router for the quantitative evaluation test of the WiFi STA in the state of strong signal reception; if the WiFi STA receives the signal mainly from WiFi The residual electromagnetic wave energy transmitted by the Router through the wall can be used for the quantitative evaluation test of the WiFi STA weak signal receiving state; the preset position and the strong signal test position can be used for testing; if WiFi The STA receives signals mainly from the superimposed energy of the multi-path reflection transmitted by the WiFi Router, which can be used for WiFi.
  • the quantitative evaluation test of the STA in the medium signal state can be tested by using the preset position and the medium signal test position.
  • Figure 2 is an optional space home structure that satisfies the condition, where the preset position 1 is located in the living room, WiFi STA is fixedly placed in preset position 1, strong signal test position 2 is selected in the living room within 4 meters from the preset position 1; weak signal test position 3 is selected in the master bedroom separated from the living room by two walls,
  • the signal test position 4 can be selected to be located in the second bedroom that is diagonally opposite the living room door, and can also be selected in a hollow room that is separated from the living room by a wall.
  • the wireless terminal 20 is disposed at the preset position 1 for receiving a wireless signal; the wireless terminal may be a smart TV, a smart TV box, a mobile phone, a tablet computer or a notebook.
  • the wireless routing end 30 or the wireless access node is placed at any of the selected current test positions of the strong signal test position 2, the weak signal test position 3, and the medium signal test position 4 for forwarding the wireless signal;
  • the wireless routing end 30 or the wireless access node's own location selection is also not in order.
  • the wireless radio routing end 30 or the wireless access node may be placed in the strong signal test position 2, the middle signal test position 4, and the weak signal test position 3 in sequence;
  • the wireless routing end 30 may be sequentially placed in the strong signal test position 2, the weak signal test position 3, and the middle signal test position 4; or may be placed in the weak signal test position 3, the middle signal test position 4, and the strong signal test position. 2.
  • a wireless throughput test architecture (ie, a wireless throughput test module) is set up between the routers, and the Ixchairot/Endpoint throughput test software is utilized.
  • the wireless AP 5 (which may also be a wireless router) corresponds to the strong signal test position 2 (refer to point A in FIG. 2), the weak signal test position 3 (refer to point B in FIG. 2), and the middle signal test position 4 (Refer to the transmission signal position of point C, point D, and point E in Figure 2), PC2 is equivalent to WiFi.
  • STA Wireless Card accesses PC2 through usb
  • PC1 is used as the transmitting end of data, forwarded by AP5, and then transmitted to PC2 through WiFi, and WiFi can be measured through this architecture.
  • the STA corresponds to the maximum accepted data rate (Mbps) at the A, B, C, D, and E points corresponding to various signal qualities (the RSSI can be used as one of the reference factors).
  • the first determining module 50 is configured to determine that the wireless terminal 20 is qualified when the maximum received data rate of the wireless terminal 20 is greater than the qualified quantitative value corresponding to the test position; otherwise, determine that the wireless terminal 20 is unqualified.
  • the STA records the received signal strength RSSI value when the wireless AP is at points A, B, C, D, and E.
  • the WiFi is detected.
  • the qualified quantitative value of the current test position standard data can be set according to the measurement data of the qualified product. For example, if the strong signal test position is selected as the current position, the test is the reception performance of the wireless terminal product after the attenuation is mainly caused by the linear distance, and the reception is performed.
  • the measurement data needs to be compared with the qualified quantitative value of the standard data under the strong signal state (corresponding to the qualified quantitative value of the standard data after the linear distance attenuation), and when the received measurement data is larger than the qualified quantitative value of the current test position standard data, the determination is performed.
  • the wireless terminal is qualified, otherwise, the wireless terminal is determined to be unqualified.
  • the technical solution of the present invention first selects an open environment that satisfies the test requirements, and then selects a preset position 1 in an open environment, and places the wireless terminal fixedly; selects a strong signal test position 2, a weak signal test position 3, and Signal test position 4, for placing a wireless routing end or a wireless access node, wherein when the wireless routing end or the wireless access node is placed in the strong signal test position 2, between the wireless routing end and the wireless terminal or between the wireless access node and the wireless terminal.
  • the wireless link at this time, the wireless signal received by the wireless terminal and transmitted by the wireless routing end or the wireless access node is mainly attenuated by the linear distance, and the signal strength and quality are high, and the wireless terminal is tested by the wireless throughput test module under the strong signal state.
  • the wireless signal received by the wireless terminal and transmitted by the wireless routing end or the wireless access node is mainly attenuated by the obstacle, and the signal strength and quality are low.
  • the wireless terminal test module is used to test the receiving performance of the wireless terminal in the middle signal state; since the open test environment is closer to the use environment of the wireless terminal product, the wireless signal received by the wireless terminal product is in the test process.
  • the interference received is roughly equivalent to the interference encountered during use, so the WiFi can be simulated realistically by the above method.
  • the use environment improves the accuracy of the wireless terminal receiving performance test.
  • the system further includes a location determining module 10, configured to determine a preset location, a strong signal test location, a weak signal test location, and The medium signal test position; the no position determination module 10 includes:
  • the selecting module 11 is configured to select candidate test locations of the open environment according to three attenuation factors in the signal attenuation model;
  • Point A will be used as a strong signal test point for WiFi hotspots. It can also be fully explained from the WiFi signal propagation theory. Point A is a linear signal transmission model with line-of-sight range, and the linear distance is about 4 meters.
  • Point B will serve as a weak signal test point for WiFi hotspots, and the WiFi signal propagation theory can also be fully explained.
  • the signal received by the STA is mainly from the energy remaining after transmitting the wireless electromagnetic wave through the two walls, and the residual energy will be weak after the attenuation;
  • Point C, D, and E will be used as WiFi hotspots for medium signal test points.
  • the WiFi signal propagation theory can also be fully explained.
  • the signal received by the STA is partly from the energy after penetrating a wall, and most of it comes from the superimposed signal of multipath transmission.
  • the three points A, B, and C completely cover the strong, medium, and weak state of the transmitted signal, and can cover most of the outdoor environment's normal communication state.
  • a location testing module 12 configured to measure a maximum received data rate of the wireless terminal at a transmitting end at the candidate test location
  • the WiFi signal of the 2.4G frequency band and the 5G frequency band is selected, and the WiFi scanning software can be used to obtain and view the spectrum of the 2.4G frequency band WiFi signal and the 5G frequency band WiFi signal. Use status;
  • the surrounding WiFi environment has no interference or less interference.
  • the scan function can view the SSID in the current area.
  • the SSID may not be broadcast. In this case, the user must manually set the SSID to enter the corresponding network. Simply put, the SSID is the name of a LAN. Only computers set to the same SSID value can communicate with each other.
  • the R7000-2.4G hotspot is the WiFi that will be selected in the model.
  • the 2.4G signal of the Router so the entire 2.4G band has only one SSID with strong SSID, indicating that the WiFi environment is an open space with very small interference. It can be obtained from the channel occupancy distribution of the 5G band WiFi hotspot.
  • the 5G band has only one hotspot signal with the SSID of R7000-5G, which is also the WiFi to be selected in the model.
  • the 5G signal of the Router indicates that there is no interference signal in this environment.
  • the first determining module 13 is configured to determine a strong signal test position, a medium signal test position, and a weak signal test position according to the measured maximum received data rate of the wireless terminal at the transmit end of the candidate test position.
  • the RSSI is -80dbm, and the transmission signals are relatively weak.
  • the interference is small and negligible.
  • the SSID is the hotspot of R7000-2.4G. WiFi to be selected in the model
  • the 2.4G signal of the Router has only one strong signal with a SSID of zxy in the entire 2.4G band. It can be obtained from the channel occupancy distribution of the 5G band WiFi hotspot.
  • the 5G band has only one hotspot signal with the SSID of R7000-5G, which is also the WiFi to be selected in the model. 5G signal of the Router.
  • the system further includes an environment confirmation module 60, and the environment confirmation module 60 includes:
  • the second judging module 61 is configured to determine whether the viewing distance of the open space is within a preset range, and whether there are multiple rooms in the open space; the viewing distance of the selected space usually needs to meet 15 meters, specifically through the ranging sensor
  • the measurement is performed in combination with the judgment program in the software; more than three rooms are required in the open space, which can be completed by the camera and the judgment program; if the above conditions are satisfied at the same time, the following steps are performed, which is similar to the real environment, and the test is performed. More accurate;
  • the viewing module 62 is configured to view the usage status of the spectrum occupied by the WiFi signal in the set frequency band when the viewing distance of the open space is within a preset range, and when there are multiple rooms in the open space; In the case of two conditions, the frequency spectrum of the WiFi signal of the set frequency band is further called, and the usage status is checked;
  • the second determining module 63 is configured to determine that the open space is an open environment when the number of received signals is not received or the number of received signals is lower than a preset number.
  • wireless signals are more attenuated in open environments than in closed environments; second, in open environments, for WiFi.
  • the STA receiving product the received wireless signal is more susceptible to interference; for example, when there is a room in the open space, the wireless signal needs to cross the obstacle during the propagation process, and the attenuation is more severe than when there is no room; therefore, Set a preset number or a preset number range, and determine that the open space is an open environment when the number of received signals is lower than a preset number range.
  • the preset qualified quantitative value is 70% of the measured data of the qualified product at the current test position.
  • the potential interference of the hardware and software of the STA device can reduce the throughput data, that is, the measurement data loss by 30% as the qualified value of the standard data, and all the WiFi to be tested are required.
  • the STA device performs sexual energy measurement in this model, it cannot be lower than the qualified quantitative value. Otherwise, it is recorded as unqualified, indicating that it is necessary to further rectify the software and hardware of its WiFi.
  • the qualified quantitative standard value only needs to take the throughput TP (throughput), see Table 2.

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Abstract

本发明公开了一种无线终端接收性能的测试方法及系统,该方法包括:在预设开放环境的预设位置放置待侧的无线终端;将无线路由端或无线访问节点分别放置在开放环境中强、中、弱信号测试位置;当无线终端接收到信号时,测量无线路由端位于当前测试位置时无线终端的最大接收数据速率;当无线路由端或无线访问节点位于强、中、弱信号测试位置时无线终端的最大接收数据速率均大于测试位置对应的预设合格定量值时,判定无线终端合格;否则,判定无线终端不合格。本发明开放式测试环境接近无线终端使用环境,信号在测试中受到的干扰与使用中相当,真实模拟WiFi使用环境,提高无线终端接收性能测试的准确性。

Description

无线终端接收性能的测试方法及系统
技术领域
本发明涉及射频测试技术领域,尤其涉及一种无线终端接收性能的测试方法及系统。
背景技术
随着无线通信技术的成熟和发展,无线产品及无线应用层出不穷的出现在人们的视野中,如WiFi、蓝牙Bluetooth、紫蜂模块Zigbee、近场通信NFC(Near Field Communication)等。而WiFi,这个通信时代最热门的无线技术也越来越贴近我们的生活。如组建无线局域网的设备:无线路由器(WiFi Router)、无线AP(WiFi Access Point,无线访问节点)、桥接器(Network Bridge)等;各种需连入无线局域网通信的智能终端设备(WiFi STA):智能电视Smart TV、智能电视盒TV box、手机mobile phone、平板电脑Tablet PC、笔记本Notebook等。
如此丰富的WiFi产品,如何去衡量和测试其性能和合格性是量产前的必要工作, 否则不合格的WiFi产品将带来较差的无线应用体验,对整机带来较强的负面影响。目前,在量产前,厂商一般首先会对WiFi 模块做单独的硬件性能测试(根据WiFi或802.11的理论定义),比如基本参数:工作频率范围、发射功率、发射信号频谱、频率误差、误差向量幅度、杂散发射、接收灵敏度、接收最大输入信号电平、相邻信道抑制等,此测试为最基本的保证WiFi模块基础硬件性能合格的必备过程,一般供应商都会对其做严格测试。然后会做反映WiFi软硬件数据通信能力的无线吞吐量的测试,此测试也为必须,因为WiFi模块本身的硬件量测不能反映整体的WiFi性能,WiFi模块的使用需要整体系统的加载配合,比如WiFi模块内部使用的固件、WiFi驱动、WiFi上层配置和应用。
为了衡量出基于整个系统的WiFi使用性能,需要基于系统之上的一种测量方法,到目前为止,通常利用Iperf丶Ixchariot等模拟数据收发工具的吞吐量量测手段,基于系统之上,贯穿WiFi软硬件层通道,对于WiFi STA产品,比如智能电视、智能手机等进行无线吞吐量量测,一般会在暗室环境下,对WiFi发射设备(例如WiFi Router)的射频端进行强制衰减,在WiFi弱信号强度下【RSSIR(Received Signal Strength Indication接收的信号强度指示,无线发送层的可选部分,用来判定链接质量,以及是否增大广播发送强度)一般为-70dbm左右】,测量其最大接收数据速率。
经过单独模块硬件基本参数合格测试以及贯穿WiFi软硬件层的数据吞吐量模拟测试,已经可以基本保证WiFi的体验无大的风险性问题,但市场上还有很多的WiFi相关问题。最主要的问题在于,现有的测试基本都是在封闭环境下进行的,而WiFi的使用场景都是处于各种开放式环境(家庭,办公室,户外街等铺)下进行的,对于WiFi STA接收端产品,其接收到的无线信号,会受到干扰,由于测试环境与使用环境的不同,直接导致测试的准确性较低。
发明内容
本发明的主要目的在于提供一种无线终端接收性能的测试方法及装置,旨在真实地模拟WiFi 的使用环境,提高无线终端接收性能测试的准确性。
为实现上述目的,本发明提供的一种无线终端接收性能的测试方法包括以下步骤:
在预设的开放环境的预设位置处放置待侧的无线终端;
将转发无线信号的无线路由端或无线访问节点分别放置在所述开放环境中的强信号测试位置、中信号测试位置、弱信号测试位置;
当无线终端接收到无线路由端或无线访问节点转发的信号时,测量无线路由端位于当前测试位置时无线终端的最大接收数据速率;
当无线路由端或无线访问节点位于强信号测试位置、中信号测试位置、弱信号测试位置时无线终端的最大接收数据速率均大于测试位置对应的预设合格定量值时,判定所述无线终端合格;否则,判定所述无线终端不合格。
优选地,所述将转发无线信号的无线路由端或无线访问节点分别放置在所述开放环境中的强信号测试位置、中信号测试位置、弱信号测试位置的步骤之前包括:
根据信号衰减模型中的三个衰减因子,选取所述开放环境的候选测试位置;
在所述无线终端与所述无线路由端之间,或在所述无线终端与所述无线访问节点之间搭建无线吞吐量测试架构,以测量出无线终端在候选测试位置处的发射端下的最大接收数据速率;
根据所测量的无线终端在候选测试位置处的发射端下的最大接收数据速率,确定强信号测试位置、中信号测试位置、弱信号测试位置。
优选地,所述开放环境能满足无线信号的直线距离衰弱、障碍物衰减以及多径效应。
优选地,所述在预设的开放环境的预设位置处放置待侧的无线终端的步骤之前包括:
判断开放空间的视距是否在预设范围内,且所述开放空间内是否有多个房间;
若是,则查看设定频段的WiFi信号所占频谱的使用状况;
当未接收到发射信号或接收到的发射信号个数低于预设个数时,确定所述开放空间为开放环境。
优选地,所述预设合格定量值为合格产品在所述当前测试位置的量测数据的70%。
此外,为实现上述目的,本发明还提供一种无线终端接收性能的测试系统包括:
无线吞吐量测试模块,搭建在所述无线路由端与所述无线终端之间,或在所述无线访问节点与所述无线终端之间;用于测量无线路由端或无线访问节点放置在强信号测试位置、弱信号测试位置和中信号测试位置中任一选定的当前测试位置时位于预设位置的无线终端的最大接收数据速率;所述强信号测试位置、中信号测试位置、弱信号测试位置及预设位置均位于开放环境中;
第一判断模块,用于当无线终端的最大接收数据速率均大于测试位置对应的合格定量值时,判定所述无线终端合格;否则,判定所述无线终端不合格。
优选地,所述无线终端接收性能的测试系统还包括位置确定模块,所述位置确定模块包括:
选取模块,用于根据信号衰减模型中的三个衰减因子,选取所述开放环境的候选测试位置;
位置测试模块,用于测量出无线终端在候选测试位置处的发射端下的最大接收数据速率;
第一确定模块,用于根据所测量的无线终端在候选测试位置处的发射端下的最大接收数据速率,确定强信号测试位置、中信号测试位置、弱信号测试位置。
优选地,所述位置确定模块中,所述开放环境能满足无线信号的直线距离衰弱、障碍物衰减以及多径效应。
优选地,所述无线终端接收性能的测试系统还包括环境确认模块,所述环境确认模块包括:
第二判断模块,用于判断开放空间的视距是否在预设范围内,且所述开放空间内是否有多个房间;
查看模块,用于在所述开放空间的视距在预设范围内,且所述开放空间内有多个房间时,查看设定频段的WiFi信号所占频谱的使用状况;
第二确定模块,用于在未接收到发射信号或接收到的发射信号个数低于预设个数时,确定所述开放空间为开放环境。
优选地,所述第一判断模块中,所述预设合格定量值为合格产品在所述当前测试位置的量测数据的70%。
本发明的技术方案,首先选定一开放式环境,然后在开放式环境中选择预设位置,固定放置无线终端;在开放式环境中选择强信号测试位置、弱信号测试位置和中信号测试位置,用于放置无线路由端或无线访问节点,其中在无线路由端或无线访问节点端置于强信号测试位置时,无线路由端或无线访问节点与无线终端之间无线链接,此时无线终端接收到经无线路由端或无线访问节点转发的信号主要经由直线距离衰减,信号强度和质量都较高,通过无线吞吐量测试模块测试无线终端在强信号状态下的接收性能;无线路由端或无线访问节点置于弱信号测试位置时,无线终端接收到的信号经无线路由端或无线访问节点转发的信号主要经由障碍物衰减,信号强度和质量都较低,通过无线吞吐量测试模块测试无线终端在弱信号状态下的接收性能;无线路由端或无线访问节点置于中信号测试位置时,无线终端接收到经无线路由端或无线访问节点转发的信号主要经由多径效应衰减,信号强度和质量介于上述两者之间,通过无线吞吐量测试模块测试无线终端在中信号状态下的接收性能;由于开放式测试环境更接近于无线终端产品的使用环境,无线终端产品接收到的无线信号在测试过程中受到的干扰与使用过程中受到的干扰大体相当,因此通过上述方法能真实地模拟WiFi的使用环境,提高无线终端接收性能测试的准确性。
附图说明
图1为本发明无线终端接收性能的测试方法第一实施例的流程示意图;
图2为本发明无线终端接收性能的测试方法第一实施例中开放环境及测试位置的布置;
图3为本发明无线终端接收性能的测试方法第一实施例中数据发射端、无线射频端及无线终端之间的连接示意图;
图4为本发明无线终端接收性能的测试方法第二实施例的流程示意图;
图5为本发明无线终端接收性能的测试方法第三实施例的流程示意图;
图6为本发明无线终端接收性能的测试系统第一实施例的功能模块示意图;
图7为本发明无线终端接收性能的测试系统第二实施例中位置确定模块的细化功能模块示意图;
图8为本发明无线终端接收性能的测试系统第三实施例中环境确定模块的细化功能模块示意图。
本发明目的的实现、功能特点及优点将结合实施例,参照附图做进一步说明。
具体实施方式
应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
本发明提供一种无线终端接收性能的测试方法,参照图1,在一实施例中,该方法包括以下步骤:
步骤S40,在预设的开放环境的预设位置处放置待测的无线终端;
可选择大约15米左右视距的空间,这个空间为充分满足无线信号直线距离衰弱、障碍物衰减以及多径效应测试的综合理想环境;这个空间内部还可以包含多个较小的空间;更接近实际的使用环境(家庭住宅、办公室、商铺等),在预设的开放环境中选取一固定位置作为预设位置,并在预设位置处放置无线终端。
步骤S80,将转发无线信号的无线路由端或无线访问节点分别放置在所述开放环境中的强信号测试位置、中信号测试位置、弱信号测试位置;
在本发明一实施例中,预设位置与强信号测试位置之间的直线距离在3.5~4.5米之间;预设位置与弱信号测试位置之间设置有两堵墙壁,预设位置与强信号测试位置之间的连线穿过两堵所述墙壁;预设位置与中信号测试位置之间设置有一堵墙壁,预设位置与所述中信号测试位置之间的连线穿过所述墙壁;中信号测试位置到墙壁之间的距离大于3.5米。
预设位置与强信号测试位置之间的无线信号直线传播,WiFi STA接收信号主要由WiFi Router转发的经直线距离衰减后剩余的电磁波能量,因直线距离衰减较小,用于WiFi STA在强信号接收状态下的定量评估测试;预设位置与弱信号测试位置之间的无线信号穿越障碍物,WiFi STA接收信号主要由WiFi Router转发的经过墙壁穿透的剩余电磁波能量,因障碍物穿越衰减较大,可用于WiFi STA在弱信号接收状态下的定量评估测试;预设位置与中信号测试位置之间的无线信号传播中和了上述两种情况,无线信号在直线传播方向上有障碍物,但是障碍物没有达到障碍物穿越的程度或厚度;WiFi STA接收信号主要由WiFi Router转发的经过多径反射的叠加能量,可用于WiFi STA在中等信号状态下的定量评估测试,可利用预设位置与中信号测试位置进行测试。
图2为一满足条件的可选空间家居结构,其中实线为墙体,虚线为玻璃,点划线为门,其中预设位置1位于客厅,WiFi STA固定放置于预设位置1,强信号测试位置2选定于客厅内与预设位置1直线距离4米处;弱信号测试位置3选定位于与客厅间隔两堵墙壁的主卧室内,中信号测试位置4可选定位于与客厅门口斜向相对的次卧室内,还可选定位于与客厅一墙之隔的中空室内。
在强信号测试位置、弱信号测试位置和中信号测试位置中选择任一位置作为当前测试位置,在所述当前测试位置放置无线路由端或无线访问节点;无线路由端或无线访问节点用于转发经无线发射端发出的无线信号,本实施例中以无线路由端(WiFi Router)为例进行详细说明。
无线路由端的自身的位置选择没有顺序,例如可以将无线路由端依次放置在强信号测试位置、中信号测试位置、弱信号测试位置;还可以依次将无线路由端依次放置在强信号测试位置、弱信号测试位置、中信号测试位置;还可以依次放置在弱信号测试位置、中信号测试位置、强信号测试位置。
无线终端可以是智能电视、智能电视盒、手机、平板电脑或笔记本等。
步骤S90,当无线终端接收到经无线路由端或无线访问节点转发的信号时,测量无线路由端位于当前测试位置时无线终端的最大接收数据速率;
在无线终端WiFi STA和WiFi Router之间搭建无线吞吐量测试架构(即无线吞吐量测试模块),利用Ixchairot/Endpoint吞吐量测试软件。进一步参见图3,无线AP(相当于无线路由端30)对应强信号测试位置2(参照图2中的A点)、弱信号测试位置3(参照图2中的B点)、中信号测试位置4(参照图2中的C点、D点、E点)的发射信号位置,PC2相当于WiFi STA,Wireless Card通过usb接入PC2(相当于无线终端20),PC1作为数据的发射端,经过无线AP的转发,然后通过WiFi传送到PC2,通过此架构可测量出WiFi STA对应发射端在A、B、C、D、E点对应各种信号质量(RSSI可做为其中一个参考因素)下的最大接受数据速率(Mbps)。
步骤S100,无线路由端或无线访问节点位于强信号测试位置、中信号测试位置、弱信号测试位置时无线终端的最大接收数据速率均大于测试位置对应的预设合格定量值时,判定所述无线终端合格;否则,判定所述无线终端不合格。
在WiFi STA记录当无线AP5在A、B、C、D、E点时的接受信号强度RSSI值,可使用Inssider无线扫描工具检测出对应A、B、C、D、E点发射信号点时,WiFi STA能够接收到的最大信号强度值。
当无线终端的最大接收数据速率大于当前测试位置标准数据的合格定量值时,判定所述无线终端合格,否则,判定所述无线终端不合格。
当前测试位置标准数据的合格定量值可以根据合格产品的测量数据进行设定,例如选择强信号测试位置为当前位置,则测试的是主要由直线距离导致衰减后,无线终端产品的接收性能,接收量测数据需要跟强信号状态下(对应直线距离衰减后的标准数据的合格定量值)标准数据的合格定量值进行比较,当接收量测数据大于当前测试位置标准数据的合格定量值时,判定所述无线终端合格,否则,判定所述无线终端不合格。
本发明的技术方案,首先选定一的满足测试要求的开放式环境,然后在开放式环境中选择预设位置1,固定放置无线终端;选择强信号测试位置2、弱信号测试位置3和中信号测试位置4,用于放置无线路由端或无线访问节点,其中在无线路由端或无线访问节点置于强信号测试位置2时,无线路由端与无线终端之间或无线访问节点与无线终端之间无线链接,此时无线终端接收到的经无线路由端或无线访问节点转发的无线信号主要经由直线距离衰减,信号强度和质量都较高,通过无线吞吐量测试模块测试无线终端在强信号状态下的接收性能;无线路由端或无线访问节点置于弱信号测试位置3时,无线终端接收到的经无线路由端或无线访问节点转发的无线信号主要经由障碍物衰减,信号强度和质量都较低,通过无线吞吐量测试模块测试无线终端在弱信号状态下的接收性能;无线路由端或无线访问节点置于中信号测试位置4时,无线终端接收到的经无线路由端或无线访问节点转发的无线信号主要由于多径效应衰减,信号强度和质量介于上述两者之间,通过无线吞吐量测试模块测试无线终端在中信号状态下的接收性能;由于开放式测试环境更接近于无线终端产品的使用环境,无线终端产品接收到的无线信号在测试过程中受到的干扰与使用过程中受到的干扰大体相当,因此通过上述方法能真实地模拟WiFi 的使用环境,提高无线终端接收性能测试的准确性。
作为实施例二
在实施例一的基础上,参见图4,步骤S80之前包括:
步骤S50,根据信号衰减模型中的三个衰减因子,选取所述开放环境的候选测试位置;
根据信号衰减模型中的三个衰减因子(直线距离衰减、障碍物衰减、多径效应):
A点将作为WiFi热点强信号测试点,从WiFi信号传播理论也可以完全解释,A点为视距范围的直线信号传输模型,直线距离大概在4米左右;
B点将作为WiFi热点弱信号测试点,从WiFi信号传播理论也可以完全解释, 其WiFi STA接收到的信号主要是来自发射无线电磁波穿透两堵墙壁后剩余的能量, 经过此衰减后剩余能量都将较弱;
C点、D点、E点将作为WiFi热点中等信号测试点,从WiFi信号传播理论也可以完全解释, 其WiFi STA接收到的信号部分来自穿透一睹墙以后的能量,大部分来自多径发射的叠加信号。
A、 B、C三点完全覆盖发射信号的强中弱状态,可涵盖户外坏境的大部分能够正常通信的状态。
步骤S60,在所述无线终端与所述无线路由端之间,或在所述无线终端与所述无线访问节点之间搭建无线吞吐量测试架构,以测量出无线终端在候选测试位置处的发射端下的最大接收数据速率;
获取设定频段的WiFi信号所占频谱的使用状况;本实施例中选用2.4G频段和5G频段的WiFi信号,可使用WiFi扫描软件获取并查看2.4G频段WiFi信号和5G频段WiFi信号所占频谱的使用状况;
周边WiFi环境基本无干扰或者干扰较小,可使用WiFi扫描软件查看WiFi 2.4G频段和5G频段WiFi信号所占频谱的使用状况。从为2.4G频段WiFi热点(信号发射设备Router或AP)的信道占用分布状况中可得到,RSSI为-80dbm的发射信号比较多,都是信号较弱的发射点(RSSI小于-70dbm),干扰小到可以忽略不计,SSID(Service Set Identifier,以下简称SSID,是的笼统的概念,包含了ESSID和BSSID,用来区分不同的网络,无线网卡设置了不同的SSID就可以进入不同网络,SSID通常由AP广播出来,通过XP自带的扫描功能可以查看当前区域内的SSID,出于安全考虑可以不广播SSID,此时用户就要手工设置SSID才能进入相应的网络。简单说,SSID就是一个局域网的名称,只有设置为名称相同SSID的值的电脑才能互相通信)为R7000-2.4G的热点为模型中将要选择的WiFi Router的2.4G信号,所以整个2.4G频段只有1个SSID为zxy的强信号,说明此WiFi环境为干扰非常小的开放式空间。从5G频段WiFi热点的信道占用分布状况中可以得到,5G频段只有一个SSID为R7000-5G的热点信号,也是模型中将要选择的WiFi Router的5G信号,说明此环境没有任何干扰信号。
步骤S70,根据所测量的无线终端在候选测试位置处的发射端下的最大接收数据速率,确定强信号测试位置2、中信号测试位置4、弱信号测试位置3。
选择SSID为R7000~设定频段的热点为模型,在所述模型中选择最强的信号作为无线路由端的发射信号;
从2.4G频段WiFi热点的信道占用分布状况中可得到,RSSI为-80dbm的发射信号比较多,都是信号较弱的发射点,干扰小到可以忽略不计,SSID为R7000-2.4G的热点为模型中将要选择的WiFi Router的2.4G信号,整个2.4G频段只有1个SSID为zxy的强信号。从5G频段WiFi热点的信道占用分布状况中可以得到,5G频段只有一个SSID为R7000-5G的热点信号,也是模型中将要选择的WiFi Router的5G信号。
以数据表格记录当前所选测试点的所有量测数据,以便决策出固定WiFi STA位置的三种不同的信号强度和质量的五个标准测试点,见表1;以此,将A点作为强信号测试位置2,B点作为弱信号测试位置3,C、D、E三点均作为中信号测试位置4。
表1:无线终端在A、B、C、D、E点的量测数据
TP Standard(Mbps)
2.4(CH 11) 5G(CH 161)
RSSI(dbm) TP(Mbps) RSSI(dbm) TP(Mbps)
A -62 163 -53 220
B -72 68 -75 40
C -69 85 -66 90
D -76 87 -72 60
E -65 140 -58 200
实施例三
在上述实施例的基础上,参见图5,步骤S40之前还包括:
步骤S10,判断开放空间的视距是否在预设范围内,且所述开放空间内是否有多个房间;
选择空间的视距通常需要满足15米,具体可通过测距传感器进行测量,结合软件中的判断程序进行判断;开放空间内需要有三个以上的房间,具体可通过摄像头和判断程序来完成;如果同时满足上述条件再进行下述步骤,这与真实环境类似,测试的准确性更高;
步骤S20,若是,则查看设定频段的WiFi信号所占频谱的使用状况;
若同时满足上述两个条件的情况下,进一步调用设定频段的WiFi信号所占频谱,并查看使用状况;
步骤S30,当未接收到发射信号或接收到的发射信号个数低于预设个数时,确定所述开放空间为开放环境。
首先,相对于封闭式环境,开放式环境中无线信号衰减较厉害;其次在开放式环境中,对于WiFi STA接收端产品,其接收到的无线信号更容易受到干扰;例如,在开放空间中有房间时,相对于没有房间,无线信号在传播过程中需要穿越障碍物,衰减更为厉害;因此,设定一个预设个数或预设个数范围,在接收到的信号个数低于预设个数范围时,确定开放空间为开放环境。
进一步地,在实施例三的基础上,参见表2,所述当前测试位置标准数据的合格定量值为合格产品在所述当前测试位置的量测数据的70%。
因为考虑实测WiFi STA设备的整机软硬件的潜在干扰,可把吞吐量数据即量测数据损失30%作为标准数据的合格定量值,需要待测的所有WiFi STA设备在此模型中做性能量测时,都不能低于此合格定量值,否则记为不合格,说明需进一步对其WiFi做软硬件的整改。合格定量标准值只需取吞吐量TP(throughput),如表1、表2所示。
表2:三种信号强度和质量对应的量测数据
TP Standard(Mbps)
2.4G 5G
A(强信号) 100 160
B(弱信号) 40 25
C(中信号) 60 60
还可以通过上述方式进行测试,选择一个性能较好已被市场认可的WiFi Router和Wireless Card,充分保证收发端无任何涉及WiFi收发性能和连接稳定性的问题。为数据模型和标准信号测试点位置的确认做最根本有效的保证,然后把对应测试位置的测量数据的70%作为合格定量值。
本发明还提供一种无线终端接收性能的测试系统,参照图3、图6,在一实施例中,与上述无线终端接收性能的测试方法的第一实施例对应,本发明提供的无线终端接收性能的测试系统包括无线吞吐量测试模块40和第一判断模块50。
无线吞吐量测试模块40,搭建在所述无线路由端30与无线终端20之间,或在无线访问节点与无线终端20之间;用于测量无线路由端30或无线访问节点放置在强信号测试位置、弱信号测试位置和中信号测试位置中任一选定的当前测试位置时位于预设位置的无线终端20的最大接收数据速率;所述强信号测试位置、中信号测试位置、弱信号测试位置及预设位置均位于开放环境中;
开放环境能满足无线信号的直线距离衰弱、障碍物衰减以及多径效应;其中所述预设位置与强信号测试位置之间满足测试发射信号在直线距离衰减状态下无线终端接收性能的要求,所述预设位置与弱信号测试位置之间满足测试发射信号在穿透障碍物衰减状态下无线终端接收性能的要求,所述预设位置与中信号测试位置之间满足测试发射信号在多径效应衰减状态下无线终端接收性能的要求;其中所述预设位置与强信号测试位置之间满足测试发射信号在直线距离衰减状态下无线终端接收性能的要求,所述预设位置与弱信号测试位置之间满足测试发射信号在穿透障碍物衰减状态下无线终端接收性能的要求,所述预设位置与中信号测试位置之间满足测试发射信号在多径效应衰减状态下无线终端接收性能的要求;
可选择大约15米左右视距的空间,这个空间为充分满足无线信号直线距离衰弱丶障碍物衰减以及多径效应测试的综合理想环境;这个空间内部还可以包含多个较小的空间;更接近实际的使用环境(家庭住宅、办公室、商铺等),在本发明一实施例中,所述预设位置与所述强信号测试位置之间的直线距离在3.5~4.5米之间;所述预设位置与所述弱信号测试位置之间设置有两堵墙壁,所述预设位置与强信号测试位置之间的连线穿过两堵所述墙壁;所述预设位置与所述中信号测试位置之间设置有一堵墙壁,所述预设位置与所述中信号测试位置之间的连线穿过所述墙壁;所述中信号测试位置到所述墙壁之间的距离大于3.5米。
预设位置与强信号测试位置之间满足测试WiFi STA接收信号主要来自WiFi Router发射信号的直线传播,用于WiFi STA在强信号接收状态下的定量评估测试;WiFi STA接收信号假如主要来自WiFi Router发射信号经过墙壁穿透的剩余电磁波能量, 可用于WiFi STA弱信号接收状态下的定量评估测试;可利用预设位置与强信号测试位置进行测试;假如WiFi STA接收信号主要来自WiFi Router发射信号经过多径反射的叠加能量,可用于WiFi STA中等信号状态下的定量评估测试,可利用预设位置与中信号测试位置进行测试。
图2为一满足条件的可选空间家居结构,其中预设位置1位于客厅,WiFi STA固定放置于预设位置1,强信号测试位置2选定于客厅内与预设位置1直线距离4米处;弱信号测试位置3选定位于与客厅间隔两堵墙壁的主卧室内,中信号测试位置4可选定位于与客厅门口斜向相对的次卧室内,还可选定位于与客厅一墙之隔的中空室内。
无线终端20,设置在所述预设位置1,用于接收无线信号;无线终端可以是智能电视、智能电视盒、手机、平板电脑或笔记本等。
无线路由端30或无线访问节点,放置在强信号测试位置2、弱信号测试位置3和中信号测试位置4中任一选定的当前测试位置,用于转发无线信号;
无线路由端30或无线访问节点的自身的位置选择也没有顺序,例如可以将无线射路由端30或无线访问节点依次放置在强信号测试位置2、中信号测试位置4、弱信号测试位置3;还可以依次将无线路由端30依次放置在强信号测试位置2、弱信号测试位置3、中信号测试位置4;还可以依次放置在弱信号测试位置3、中信号测试位置4、强信号测试位置2。
在无线终端WiFi STA和无线路由端WiFi Router之间搭建无线吞吐量测试架构(即无线吞吐量测试模块),利用Ixchairot/Endpoint吞吐量测试软件。进一步参见图3,无线AP5(也可以是无线路由器)对应强信号测试位置2(参照图2中的A点)、弱信号测试位置3(参照图2中的B点)、中信号测试位置4(参照图2中的C点、D点、E点)的发射信号位置,PC2相当于WiFi STA,Wireless Card通过usb接入PC2,PC1作为数据的发射端,经过AP5的转发,然后通过WiFi传送到PC2,通过此架构可测量出WiFi STA对应发射端在A、B、C、D、E点对应各种信号质量(RSSI可做为其中一个参考因素)下的最大接受数据速率(Mbps)。
第一判断模块50,用于当无线终端20的最大接收数据速率均大于测试位置对应的合格定量值时,判定所述无线终端20合格;否则,判定所述无线终端20不合格。
在WiFi STA记录当无线AP在A、B、C、D、E点时的接受信号强度RSSI值,可使用Inssider无线扫描工具检测出对应A、B、C、D、E点发射信号点时,WiFi STA能够接收到的最大信号强度值。
当前测试位置标准数据的合格定量值可以根据合格产品的测量数据进行设定,例如选择强信号测试位置为当前位置,则测试的是主要由直线距离导致衰减后,无线终端产品的接收性能,接收量测数据需要跟强信号状态下(对应直线距离衰减后的标准数据的合格定量值)标准数据的合格定量值进行比较,当接收量测数据大于当前测试位置标准数据的合格定量值时,判定所述无线终端合格,否则,判定所述无线终端不合格。
本发明的技术方案,首先选定一的满足测试要求的开放式环境,然后在开放式环境中选择预设位置1,固定放置无线终端;选择强信号测试位置2、弱信号测试位置3和中信号测试位置4,用于放置无线路由端或无线访问节点,其中在无线路由端或无线访问节点置于强信号测试位置2时,无线路由端与无线终端之间或无线访问节点与无线终端之间无线链接,此时无线终端接收到的经无线路由端或无线访问节点转发的无线信号主要经由直线距离衰减,信号强度和质量都较高,通过无线吞吐量测试模块测试无线终端在强信号状态下的接收性能;无线路由端或无线访问节点置于弱信号测试位置3时,无线终端接收到的经无线路由端或无线访问节点转发的无线信号主要经由障碍物衰减,信号强度和质量都较低,通过无线吞吐量测试模块测试无线终端在弱信号状态下的接收性能;无线路由端或无线访问节点置于中信号测试位置4时,无线终端接收到的经无线路由端或无线访问节点转发的无线信号主要由于多径效应衰减,信号强度和质量介于上述两者之间,通过无线吞吐量测试模块测试无线终端在中信号状态下的接收性能;由于开放式测试环境更接近于无线终端产品的使用环境,无线终端产品接收到的无线信号在测试过程中受到的干扰与使用过程中受到的干扰大体相当,因此通过上述方法能真实地模拟WiFi 的使用环境,提高无线终端接收性能测试的准确性。
实施例二
参见图7,与上述无线终端接收性能的测试方法的第二实施例对应,系统还包括位置确定模块10,用于在开放环境中,确定预设位置、强信号测试位置、弱信号测试位置和中信号测试位置;无位置确定模块10包括:
选取模块11,用于根据信号衰减模型中的三个衰减因子,选取所述开放环境的候选测试位置;
根据信号衰减模型中的三个衰减因子(直线距离衰减、障碍物衰减、多径效应):
A点将作为WiFi热点强信号测试点,从WiFi信号传播理论也可以完全解释,A点为视距范围的直线信号传输模型,直线距离大概在4米左右;
B点将作为WiFi热点弱信号测试点,从WiFi信号传播理论也可以完全解释, 其WiFi STA接收到的信号主要是来自发射无线电磁波穿透两堵墙壁后剩余的能量, 经过此衰减后剩余能量都将较弱;
C点、D点、E点将作为WiFi热点中等信号测试点,从WiFi信号传播理论也可以完全解释, 其WiFi STA接收到的信号部分来自穿透一堵墙以后的能量,大部分来自多径发射的叠加信号。
A、 B、C三点完全覆盖发射信号的强中弱状态,可涵盖户外坏境的大部分能够正常通信的状态。
位置测试模块12,用于测量出无线终端在候选测试位置处的发射端下的最大接收数据速率;
获取设定频段的WiFi信号所占频谱的使用状况;本实施例中选用2.4G频段和5G频段的WiFi信号,可使用WiFi扫描软件获取并查看2.4G频段WiFi信号和5G频段WiFi信号所占频谱的使用状况;
周边WiFi环境基本无干扰或者干扰较小,可使用WiFi扫描软件查看WiFi 2.4G频段和5G频段WiFi信号所占频谱的使用状况。从2.4G频段WiFi热点(信号发射设备Router或AP)的信道占用分布状况中可得到,RSSI为-80dbm的发射信号比较多,都是信号较弱的发射点(RSSI小于-70dbm),干扰小到可以忽略不计,SSID(Service Set Identifier,以下简称SSID,是的笼统的概念,包含了ESSID和BSSID,用来区分不同的网络,无线网卡设置了不同的SSID就可以进入不同网络,SSID通常由AP广播出来,通过XP自带的扫描功能可以查看当前区域内的SSID,出于安全考虑可以不广播SSID,此时用户就要手工设置SSID才能进入相应的网络。简单说,SSID就是一个局域网的名称,只有设置为名称相同SSID的值的电脑才能互相通信)为R7000-2.4G的热点为模型中将要选择的WiFi Router的2.4G信号,所以整个2.4G频段只有1个SSID为zxy的强信号,说明此WiFi环境为干扰非常小的开放式空间。从5G频段WiFi热点的信道占用分布状况中可以得到,5G频段只有一个SSID为R7000-5G的热点信号,也是模型中将要选择的WiFi Router的5G信号,说明此环境没有任何干扰信号。
第一确定模块13,用于根据所测量的无线终端在候选测试位置处的发射端下的最大接收数据速率,确定强信号测试位置、中信号测试位置、弱信号测试位置。
选择SSID为R7000~设定频段的热点为模型,在所述模型中选择最强的信号作为无线射频端的发射信号;
从2.4G频段WiFi热点的信道占用分布状况中可得到,RSSI为-80dbm的发射信号比较多,都是信号较弱的发射点,干扰小到可以忽略不计,SSID为R7000-2.4G的热点为模型中将要选择的WiFi Router的2.4G信号,整个2.4G频段只有1个SSID为zxy的强信号。从5G频段WiFi热点的信道占用分布状况中可以得到,5G频段只有一个SSID为R7000-5G的热点信号,也是模型中将要选择的WiFi Router的5G信号。
以数据表格记录当前所选测试点的所有量测数据,以便决策出固定WiFi STA位置的三种不同的信号强度和质量的五个标准测试点,见表2。
实施例三
与上述无线终端接收性能的测试方法的第三实施例对应,参见图8,所述系统还包括环境确认模块60,环境确认模块60包括:
第二判断模块61,用于判断开放空间的视距是否在预设范围内,且所述开放空间内是否有多个房间;选择空间的视距通常需要满足15米,具体可通过测距传感器进行测量,结合软件中的判断程序进行判断;开放空间内需要有三个以上的房间,具体可通过摄像头和判断程序来完成;如果同时满足上述条件再进行下述步骤,这与真实环境类似,测试的准确性更高;
查看模块62,用于在所述开放空间的视距在预设范围内,且所述开放空间内有多个房间时,查看设定频段的WiFi信号所占频谱的使用状况;若同时满足上述两个条件的情况下,进一步调用设定频段的WiFi信号所占频谱,并查看使用状况;
第二确定模块63,用于在未接收到发射信号或接收到的发射信号个数低于预设个数时,确定所述开放空间为开放环境。首先,相对于封闭式环境,开放式环境中无线信号衰减较厉害;其次在开放式环境中,对于WiFi STA接收端产品,其接收到的无线信号更容易受到干扰;例如,在开放空间中有房间时,相对于没有房间,无线信号在传播过程中需要穿越障碍物,衰减更为厉害;因此,设定一个预设个数或预设个数范围,在接收到的信号个数低于预设个数范围时,确定开放空间为开放环境。
与上述无线终端接收性能的测试方法的第三实施例对应,所述第一确定模块50中,所述预设合格定量值为合格产品在所述当前测试位置的量测数据的70%。
因为考虑实测WiFi STA设备的整机软硬件的潜在干扰,可把吞吐量数据即量测数据损失30%作为标准数据的合格定量值,需要待测的所有WiFi STA设备在此模型中做性能量测时,都不能低于此合格定量值,否则记为不合格,说明需进一步对其WiFi做软硬件的整改。合格定量标准值只需取吞吐量TP(throughput),参见表2。
还可以通过上述方式进行测试,选择一个性能较好已被市场认可的WiFi Router和Wireless Card,充分保证收发端无任何涉及WiFi收发性能和连接稳定性的问题。为数据模型和标准信号测试点位置的确认做最根本有效的保证,然后把对应测试位置的测量数据的70%作为合格定量值。
以上仅为本发明的优选实施例,并非因此限制本发明的专利范围,凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本发明的专利保护范围内。

Claims (10)

  1. 一种无线终端接收性能的测试方法,其特征在于,所述方法包括以下步骤:
    在预设的开放环境的预设位置处放置待侧的无线终端;
    将转发无线信号的无线路由端或无线访问节点分别放置在所述开放环境中的强信号测试位置、中信号测试位置、弱信号测试位置;
    当无线终端接收到无线路由端或无线访问节点转发的信号时,测量无线路由端位于当前测试位置时无线终端的最大接收数据速率;
    当无线路由端或无线访问节点位于强信号测试位置、中信号测试位置、弱信号测试位置时无线终端的最大接收数据速率均大于测试位置对应的预设合格定量值时,判定所述无线终端合格;否则,判定所述无线终端不合格。
  2. 如权利要求1所述的无线终端接收性能的测试方法,其特征在于,所述将转发无线信号的无线路由端或无线访问节点分别放置在所述开放环境中的强信号测试位置、中信号测试位置、弱信号测试位置的步骤之前包括:
    根据信号衰减模型中的三个衰减因子,选取所述开放环境的候选测试位置;
    在所述无线终端与所述无线路由端之间,或在所述无线终端与所述无线访问节点之间搭建无线吞吐量测试架构,以测量出无线终端在候选测试位置处的发射端下的最大接收数据速率;
    根据所测量的无线终端在候选测试位置处的发射端下的最大接收数据速率,确定强信号测试位置、中信号测试位置、弱信号测试位置。
  3. 如权利要求1所述的无线终端接收性能的测试方法,其特征在于,所述开放环境能满足无线信号的直线距离衰弱、障碍物衰减以及多径效应。
  4. 如权利要求3所述的无线终端接收性能的测试方法,其特征在于,所述在预设的开放环境的预设位置处放置待侧的无线终端的步骤之前包括:
    判断开放空间的视距是否在预设范围内,且所述开放空间内是否有多个房间;
    若是,则查看设定频段的WiFi信号所占频谱的使用状况;
    当未接收到发射信号或接收到的发射信号个数低于预设个数时,确定所述开放空间为开放环境。
  5. 根据权利要求1所述的无线终端接收性能的测试方法,其特征在于,所述预设合格定量值为合格产品在所述当前测试位置的量测数据的70%。
  6. 一种无线终端接收性能的测试系统,其特征在于,所述系统包括:
    无线吞吐量测试模块,搭建在所述无线路由端与所述无线终端之间,或在所述无线访问节点与所述无线终端之间;用于测量无线路由端或无线访问节点放置在强信号测试位置、弱信号测试位置和中信号测试位置中任一选定的当前测试位置时位于预设位置的无线终端的最大接收数据速率;所述强信号测试位置、中信号测试位置、弱信号测试位置及预设位置均位于开放环境中;
    第一判断模块,用于当无线终端的最大接收数据速率均大于测试位置对应的预设合格定量值时,判定所述无线终端合格;否则,判定所述无线终端不合格。
  7. 根据权利要求6所述的无线终端接收性能的测试系统,其特征在于,所述无线终端接收性能的测试系统还包括位置确定模块,所述位置确定模块包括:
    选取模块,用于根据信号衰减模型中的三个衰减因子,选取所述开放环境的候选测试位置;
    位置测试模块,用于测量出无线终端在候选测试位置处的发射端下的最大接收数据速率;
    第一确定模块,用于根据所测量的无线终端在候选测试位置处的发射端下的最大接收数据速率,确定强信号测试位置、中信号测试位置、弱信号测试位置。
  8. 根据权利要求7所述的无线终端接收性能的测试系统,其特征在于,所述位置确定模块中,所述开放环境能满足无线信号的直线距离衰弱、障碍物衰减以及多径效应。
  9. 根据权利要求8所述的无线终端接收性能的测试系统,其特征在于,所述无线终端接收性能的测试系统还包括环境确认模块,所述环境确认模块包括:
    第二判断模块,用于判断开放空间的视距是否在预设范围内,且所述开放空间内是否有多个房间;
    查看模块,用于在所述开放空间的视距在预设范围内,且所述开放空间内有多个房间时,查看设定频段的WiFi信号所占频谱的使用状况;
    第二确定模块,用于在未接收到发射信号或接收到的发射信号个数低于预设个数时,确定所述开放空间为开放环境。
  10. 根据权利要求6所述的无线终端接收性能的测试系统,其特征在于,所述第一判断模块中,所述预设合格定量值为合格产品在所述当前测试位置的量测数据的70%。
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