WO2020239125A1 - Procédé et dispositif de test de radar - Google Patents

Procédé et dispositif de test de radar Download PDF

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Publication number
WO2020239125A1
WO2020239125A1 PCT/CN2020/093740 CN2020093740W WO2020239125A1 WO 2020239125 A1 WO2020239125 A1 WO 2020239125A1 CN 2020093740 W CN2020093740 W CN 2020093740W WO 2020239125 A1 WO2020239125 A1 WO 2020239125A1
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WIPO (PCT)
Prior art keywords
radar
type
frame
sent
scan
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PCT/CN2020/093740
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English (en)
Chinese (zh)
Inventor
韩霄
尹瑞
张中源
闫莉
张美红
刘辰辰
杜瑞
李云波
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华为技术有限公司
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Publication of WO2020239125A1 publication Critical patent/WO2020239125A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/40—Means for monitoring or calibrating

Definitions

  • This application relates to the field of communication technology, and in particular to radar testing methods and devices.
  • Radar (radar) test is to find the target with wireless electromagnetic waves and detect the spatial position of the target.
  • the introduction of radar testing in Wireless Local Area Networks (WLAN) is a very promising technology in the future.
  • WIFI radar can be used to detect the presence of people, identify people's actions, and troubleshoot equipment failures.
  • Using radar testing in WLAN can make full use of existing network resources without the need to deploy a large number of additional radars, thereby saving costs.
  • This application provides a radar test method and device, which are used to support the implementation of radar test in WLAN.
  • a radar test method including: a first device generates a second type of scan frame, the second type of scan frame includes a radar signal; and the first device sends one or more The second type of scanning frame.
  • the first device can implement radar testing by sending the second type of scanning frame during the beamforming training phase.
  • the technical solution of the present application realizes the process compatibility between beamforming training and radar testing, so that the first device can perform beamforming training and radar testing at the same time, so that there is no need to allocate additional time domain resources for radar testing, which is beneficial to saving information. Make costs and resource costs.
  • the technical solution of the present application can support the realization of radar testing in WLAN.
  • the first device determines the number of sent scan frames of the second type according to the FSS value.
  • the FSS value may be determined according to the beacon frame sent by the second device.
  • the first device determines the number of sent scan frames of the second type according to the FSS value, including: the first device determines the number of sent scan frames of the second type according to the FSS value and the first correspondence. Number; wherein, the first correspondence is the correspondence between the FSS value and the number of sent scan frames of the second type.
  • the second type scan frame is a second type sector scan SSW frame, or a second type short sector scan short SSW frame.
  • the first corresponding relationship may be as shown in the following table:
  • the time length of the radar signal in the second type of scanning frame is determined according to the following formula:
  • TXTIME radar signal
  • TXTIME first type scan frame
  • SBIFS the interval between short beam forming frames
  • x the first type corresponding to the FSS value
  • y represents the number of sent second type scan frames corresponding to the FSS value.
  • the first device determines the number of scan frames of the second type according to the FSS value, including: the first device determines the scan frame of the second type according to the FSS value and the time length of the radar signal The number of sent.
  • the number of sent scan frames of the second type is determined according to the following formula:
  • m represents the number of sent scan frames of the second type.
  • the first device determines the number of scan frames of the second type to be sent according to the FSS value, including: the first device according to the FSS value, the length type of the radar signal, and the second correspondence, The number of sent scan frames of the second type is determined; wherein the second correspondence is the correspondence between the FSS value, the length type of the radar signal, and the number of sent scan frames of the second type.
  • the sector scan time slot is determined according to the following formula:
  • aSSSlotTime aAirPropagationTime+assduration+radar signal length*N+MBIFS+aSSFBDuration+MBIFS;
  • aSSSlotTime represents the length of the sector scan time slot
  • aAirPropagationTime represents the propagation delay between the first device and the second device
  • assduration represents the time required for the first device to transmit the first type of scan frame under the corresponding FSS value
  • radar signal length represents the time length of the radar signal in the second type of scan frame
  • N represents the number of sent second type of scan frames
  • aSSFBDuration represents the time required for the second device to perform the SSW feedback process
  • MBIFS represents the interval between medium beamforming frames .
  • the method further includes: the first device receives a beacon frame sent by the second device, where the beacon frame includes radar test information. Based on this design, because the beacon frame includes radar test information, the first device can perform corresponding radar tests in the beamforming training phase according to the radar test information.
  • the radar test information includes at least one of the following parameters: radar data feedback type, radar signal length type, and indication information.
  • radar data feedback type is used to indicate the radar test data to be fed back.
  • the length type of the radar signal is used to determine the time length of the radar signal.
  • the indication information is used to indicate one or more first devices that need to perform a radar test.
  • the method further includes: the first device sends radar test data to the second device in a first SP, and the first SP is an SP used to feed back the radar test data. Based on this design, the second device can obtain radar test data.
  • the method further includes: the first device sends an association request frame to the second device, where the association request frame is used to indicate whether the first device has a radar test capability.
  • the first device sends an association request frame to the second device during the association phase, and the association request frame can be used to indicate whether the first device has the radar test capability.
  • the second device can learn whether the first device can perform radar testing according to the association request frame, thereby avoiding the second device from scheduling the first device without radar testing capability to perform radar testing, thereby ensuring the radar test process Can be executed normally.
  • a radar test method including: a second device generates a beacon frame, the beacon frame including radar test information. The second device sends a beacon frame to one or more first devices.
  • the first device can perform corresponding radar tests in the beamforming training phase according to the radar test information.
  • the radar test information includes at least one of the following parameters: radar data feedback type, radar signal length type, and indication information.
  • radar data feedback type is used to indicate the radar test data to be fed back.
  • the length type of the radar signal is used to determine the time length of the radar signal.
  • the indication information is used to indicate one or more first devices that need to perform a radar test.
  • the beacon frame further includes an FSS value, and the FSS value is used to determine the number of transmissions of the second type of scanning frame, and the second type of scanning frame includes a radar signal.
  • the time length of the radar signal in the second type of scanning frame is determined according to the following formula:
  • TXTIME radar signal
  • TXTIME first type scan frame
  • SBIFS the interval between short beam forming frames
  • x the first type corresponding to the FSS value
  • y represents the number of sent second type scan frames corresponding to the FSS value.
  • the number of sent scan frames of the second type is determined according to the FSS value and the time length of the radar signal.
  • the number of sent scan frames of the second type is determined according to the following formula:
  • m represents the number of sent scan frames of the second type.
  • the sector scan time slot is determined according to the following formula:
  • aSSSlotTime aAirPropagationTime+assduration+radar signal length*N+MBIFS+aSSFBDuration+MBIFS;
  • aSSSlotTime represents the length of the sector scan time slot
  • aAirPropagationTime represents the propagation delay between the first device and the second device
  • assduration represents the time required for the first device to transmit the first type of scan frame under the corresponding FSS value
  • radar signal length represents the time length of the radar signal in the second type of scan frame
  • N represents the number of sent second type of scan frames
  • aSSFBDuration represents the time required for the second device to perform the SSW feedback process
  • MBIFS represents the interval between medium beamforming frames .
  • the method further includes: the second device receives the radar test data sent by the first device in the first SP, and the first SP is an SP used to feed back the radar test data.
  • the method further includes: the second device receives an association request frame sent by the first device, the association request frame is used to indicate whether the first device has radar test capability; the second device according to the association request frame, Determine whether the first device has radar test capability.
  • a radar test method including: a first device receives a first indication frame sent by a second device, the first indication frame is used to indicate radar test scheduling information; the first device sends to the second device The first response frame, the first response frame is used to respond to the first indication frame; the first device receives the second indication frame sent by the second device, and the second indication frame is used to instruct the first device to perform a radar test; the first device responds to the radar The scheduling information of the test is used for radar testing.
  • the second device sends the first indication frame, so that the multiple first devices learn the scheduling information of the radar test. After that, the second device sends a second indication frame to the first device to uniformly schedule multiple first devices to perform radar tests according to the radar test scheduling information, thereby realizing multi-station radar testing.
  • the radar test scheduling information includes at least one of the following parameters: radar SP information, radar data feedback type, and radar transceiver control information.
  • the information of the radar SP includes the information of the second SP and the information of the third SP
  • the second SP is the SP used for radar testing
  • the third SP is the SP used to feed back radar test data.
  • the radar data feedback type is used to indicate the radar test data to be fed back.
  • the radar transceiver control information is used to indicate the function of each first device in the radar test among the M first devices, and M is a positive integer.
  • the first device receiving the second indication frame sent by the second device includes: the first device receives the second indication frame sent by the second device in the second SP.
  • the first device performs the radar test according to the radar test scheduling information, including: the first device performs the radar test according to the radar test scheduling information in the second SP.
  • the first device performs the radar test according to the radar test scheduling information, including: if the first device serves as the transmitter of the radar, the first device sends the radar signal in a sector scan mode; If the first device serves as the receiving end of the radar, the first device receives the radar signal in a quasi-omnidirectional manner.
  • the method further includes: the first device sends second response information to the second device in the second SP, and the second response information is used to indicate that the first device has completed the radar test.
  • the method further includes: the first device receives third indication information sent by the second device, the third indication information is used to instruct the first device to feed back radar test data; the first device sends radar to the second device Test Data.
  • the first device receiving the third indication information sent by the second device includes: the first device receives the third indication information sent by the second device in the third SP.
  • the first device sending radar test data to the second device includes: the first device sends radar test data to the second device in the third SP.
  • the method further includes: the first device sends an association request frame to the second device, where the association request frame is used to indicate whether the first device has a radar test capability.
  • a radar test method including: a second device sends a first indication frame to M first devices, the first indication frame is used to indicate radar test scheduling information, and M is a positive integer; second The device receives the first response frame sent by each of the M first devices, the first response frame is used to respond to the first indication frame; the second device sends the second indication frame to the N first devices, the second The indication frame is used to instruct the first device to perform a radar test, the N first devices are a subset of the M first devices, and N is a positive integer less than or equal to M.
  • the second device sends the first indication frame, so that the multiple first devices learn the scheduling information of the radar test. After that, the second device sends a second indication frame to the first device to uniformly schedule multiple first devices to perform radar testing according to the radar test scheduling information, thereby realizing multi-station radar testing.
  • the radar test scheduling information includes at least one of the following parameters: radar SP information, radar data feedback type, and radar transceiver control information.
  • the information of the radar SP includes the information of the second SP and the information of the third SP
  • the second SP is the SP used for radar testing
  • the third SP is the SP used to feed back radar test data.
  • the radar data feedback type is used to indicate the radar test data to be fed back.
  • the radar transceiver control information is used to indicate the function of each first device in the radar test among the M first devices, and M is a positive integer.
  • the second device sending the second indication frame to the N first devices includes: the second device sending the second indication frame to the N first devices in the second SP.
  • the method further includes: the second device receives the second response information sent by the first device in the second SP, and the second response information is used to indicate that the first device has completed the radar test.
  • the method further includes: the second device sends third indication information to the first device, the third indication information is used to instruct the first device to feed back radar test data; the second device receives the radar sent by the first device Test Data.
  • the second device sending the third indication information to the first device includes: the second device sends the third indication information to the first device in the third SP.
  • the second device receiving the radar test data sent by the first device includes: the second device receives the radar test data sent by the first device in the third SP.
  • the method further includes: the second device receives an association request frame sent by the first device, where the association request frame is used to indicate whether the first device has a radar test capability.
  • a communication device may be a first device or a device in the first device.
  • the device may include modules for executing the methods/operations/steps/actions described in the first aspect and any of the designs, or the method/operation/step/action described in the third aspect and any of the designs.
  • the above-mentioned modules may be hardware circuits, or software, or implemented by hardware circuits combined with software.
  • a communication device may be a second device or a device in the second device.
  • the device may include modules for executing the second aspect and any of the designs, or the method/operation/step/action described in the fourth aspect and any of the designs.
  • the above-mentioned modules may be hardware circuits, or software, or implemented by hardware circuits combined with software.
  • a communication device in a seventh aspect, includes a processor and a transceiver.
  • the processor is configured to perform processing operations in the radar test method involved in any of the designs of the first to fourth aspects, such as Generate second type scan frames and so on.
  • the transceiver is used to accept the control of the processor to perform the transceiver operations in the radar test method designed in any one of the designs of the first aspect to the fourth aspect, such as sending the second type of scanning frame.
  • a computer-readable storage medium is provided.
  • the computer-readable storage medium is used to store instructions.
  • the instructions are read by a computer, the computer is used to execute any one of the above-mentioned designs in the first to fourth aspects.
  • the radar test method involved.
  • a computer program product includes instructions.
  • the computer reads the instruction, the computer executes the radar test method involved in any one of the above-mentioned first to fourth aspects.
  • a chip in a tenth aspect, includes a processing circuit and a transceiver pin.
  • the chip also includes a memory.
  • the processing circuit is used to perform processing operations in the radar test method involved in any one of the possible designs of the first aspect to the fourth aspect, such as generating a second type of scan frame.
  • the transceiver pin is used to receive the control of the processing circuit, and execute the transceiver operation in the radar test method involved in any one of the possible designs of the first aspect to the fourth aspect, such as sending the second type of scanning frame.
  • the memory is used to store instructions, which are called by the processor to perform processing operations in the radar test method involved in any one of the first to fourth aspects.
  • a communication system including: a first device and a second device.
  • the first device is used to execute the radar test method involved in any one of the above-mentioned first aspect or the third aspect;
  • the second device is used to implement any one of the above-mentioned design involved in the second or fourth aspect Radar test method.
  • the technical effects brought by any one of the designs of the fifth aspect to the eleventh aspect can refer to the beneficial effects in the corresponding method provided above, which will not be repeated here.
  • FIG. 1 is a schematic structural diagram of a beacon interval provided by an embodiment of this application.
  • FIG. 2 is a schematic diagram of a flow of beamforming training provided by an embodiment of this application.
  • FIG. 3 is a flowchart of a radar test method provided by an embodiment of the application.
  • FIG. 4 is a schematic diagram of a radar signal in the head of a second-type scanning frame provided by an embodiment of the application;
  • FIG. 5 is a schematic diagram of a radar signal in the middle of a second type of scanning frame provided by an embodiment of the application;
  • FIG. 6 is a schematic diagram of a radar signal at the end of a second type of scanning frame provided by an embodiment of the application;
  • FIG. 7 is a schematic diagram of a scenario where a first device sends a scan frame of a first type according to an embodiment of the application
  • FIG. 8 is a schematic diagram of a single-station radar test scenario provided by an embodiment of the application.
  • FIG. 9 is a schematic diagram of a multi-station radar test scenario provided by an embodiment of the application.
  • FIG. 10 is a flowchart of a radar testing method provided by an embodiment of the application.
  • FIG. 11 is a schematic diagram of a frame structure of a beacon frame provided by an embodiment of this application.
  • FIG. 12 is a schematic diagram of another frame structure of a beacon frame provided by an embodiment of this application.
  • FIG. 13 is a flowchart of a capability reporting method provided by an embodiment of the application.
  • FIG. 14 is a schematic structural diagram of an EMDG capabilities element provided by an embodiment of the application.
  • FIG. 15 is a feedback method of radar test data provided by an embodiment of the application.
  • FIG. 16 is a schematic diagram of a frame structure of an SPR frame provided by an embodiment of this application.
  • FIG. 17 is a timing diagram of a radar test provided by an embodiment of the application.
  • FIG. 18 is a flowchart of a radar test method provided by an embodiment of the application.
  • FIG. 19 is a schematic diagram of a frame structure of a first indication frame provided by an embodiment of this application.
  • FIG. 21 is a timing diagram of a radar test provided by an embodiment of the application.
  • 22 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 23 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • indication may include direct indication and indirect indication, as well as explicit indication and implicit indication.
  • the information indicated by a certain piece of information is called information to be instructed.
  • the information to be indicated may be directly indicated, wherein the information to be indicated itself or the index of the information to be indicated, etc.
  • the information to be indicated can also be indicated indirectly by indicating other information, where there is an association relationship between the other information and the information to be indicated.
  • it is also possible to realize the indication of specific information by means of the arrangement sequence of each information agreed in advance (for example, as stipulated in the agreement), thereby reducing the indication overhead to a certain extent.
  • the radar can be divided into single station radar, bistatic radar and multistatic radar.
  • the transmitter and receiver of a single station radar are co-located.
  • the receiving end and transmitting end of bistatic radar and multistatic radar are physically separated.
  • Beacon interval (beacon interval, BI)
  • BI includes beacon header indication (BHI) and data transmission interval (DTI).
  • BHI includes: beacon transmission interval (BTI), association-beamforming training (A-BFT), and announcement transmission interval (ATI).
  • DTI can be divided into several sub-intervals. Among them, there are two types of sub-intervals: contention-based access period (CBAP) and service period (SP).
  • CBAP contention-based access period
  • SP service period
  • DTI may include CBAP1, CBAP2, SP1, SP2, and so on.
  • the PCP/AP will send multiple beacon (beacon) frames according to the sector number to perform downlink sector scanning.
  • a station In A-BFT, a station (station, STA) can be associated with a personal basic service set control point (PCP) or an access point (access point, AP), and the STA can perform uplink sectors scanning.
  • PCP personal basic service set control point
  • AP access point
  • PCP/AP can poll multiple STAs for cached data information and allocate resources in DTI to STAs.
  • the transmitting beam may refer to the distribution of signal strength in different directions in space after a signal is transmitted through the antenna
  • the receiving beam may refer to the signal strength distribution of the wireless signal received from the antenna in different directions in space.
  • the beam can be a wide beam, or a narrow beam, or other types of beams.
  • the beam forming technology may be beamforming technology or other technologies.
  • the beamforming technology may specifically be a digital beamforming technology, an analog beamforming technology, or a hybrid digital/analog beamforming technology, etc.
  • Beamforming also called beamforming and spatial filtering, is a signal processing technology that uses a sensor array to send and receive signals directionally.
  • Beamforming training is used to form an aligned transmit beam and receive beam between the sender and receiver, so that the sender and receiver can communicate normally.
  • beamforming training mainly includes two parts: Sector-Level Sweep (SLS) and Beam Refinement Protocol (BRP)
  • SLS includes the following stages:
  • the initiator sector scan (ISS) stage is used to train the initiator's directional transmission beam.
  • the initiator sends training data with a certain width beam orientation, and the responder receives the training data in a quasi-omnidirectional manner.
  • the responder sector scan (RSS) stage is used to train the responder's directional transmission beam.
  • the responder sends training data with a certain width of beam directional and contains the best sending sector information of the initiator in the previous stage. At this time, the initiator receives the training data in a quasi-omnidirectional manner.
  • the initiator sends feedback information to the responder.
  • the feedback information is a list of sectors sent by the initiator sorted by sector quality and contains the best sector of the responder in the previous stage.
  • the responding party is now in a quasi-omnidirectional receiving mode.
  • Sector Scanning Acknowledgement (SSW ACK) is used for responding to the initiator to feed back a list of sectors sent by the responding party sorted by quality.
  • SSW ACK is optional.
  • SLS may be executed before DTI without the SSW ACK phase, and SSW ACK phase is required to execute SLS in the DTI phase.
  • BRP includes the following stages:
  • the initial setup (BRP setup) stage is used to configure subsequent multi-sector ID detection (MID) and beam pairing (Beam Combining, BC) training information.
  • MID multi-sector ID detection
  • Beam Combining, BC Beam Combining
  • the MID phase is used to train the best receiving beams of the initiator and the responder.
  • the method is similar to the training process of the best sending beam, except that the training data is sent in the quasi-omnidirectional mode and the training data is received in the directional mode.
  • the BC stage is used to pair the receiving and transmitting beams trained in the SLS and MID stages to obtain the best pairing of the receiving and transmitting beams to find the best directional communication link. At this time, both sending and receiving training data adopt the directional mode.
  • At least one round of beam refinement (BRT) stage is used to perform further beam refinement, so as to iteratively find more refined beam pairs and improve the quality of the communication link.
  • the radar test data may include at least one of the following parameters:
  • Channel state information (channel state information, CSI).
  • CSI is used to reflect the state of the channel.
  • the CSI may include at least one of the following parameters: precoding matrix indicator (PMI), rank indicator (RI), channel quality indicator (CQI), channel state information Reference signal resource indicator (CSI-RS resource indicator, CRI) and layer indicator (layer indicator, LI).
  • the sampling data of the time-domain signal includes: each sampling point and the corresponding sampling value of the time-domain signal without fast Fourier numbering.
  • the FFT spectrum is obtained by FFT transformation of the sampled digital signal.
  • the FFT spectrum can be a rang-FFT spectrum, a doppler-FFT spectrum, or an angle-FFT spectrum.
  • (4) Radar test results including: distance, speed, and angle.
  • the distance is the distance between the measured object and the radar.
  • the speed is the speed of the measured object.
  • the angle is the angle between the measured object and the radar.
  • the distance can be determined according to the value of the abscissa corresponding to the peak in the range-FFT spectrum.
  • the speed can be based on the value of the abscissa corresponding to the peak in the doppler-FFT spectrum.
  • the angle can be determined according to the value of the abscissa corresponding to the peak in the angle-FFT spectrum.
  • the FSS value is used to determine the number of short SSW/SSW frames sent in the sector scan slot. As shown in Table 1, the current standard defines the correspondence between the FSS value and the number of short SSW/SSW frames sent.
  • the standard adopted by the WLAN may be the IEEE 802.11 standard, such as the 802.11ad standard, the 802.11ay standard, and the next-generation 802.11 standard.
  • the technical solution of the present application can also be applied to a cellular communication system, such as a fourth generation (4G) communication system and a fifth generation (5G) communication system.
  • a cellular communication system such as a fourth generation (4G) communication system and a fifth generation (5G) communication system.
  • the applicable scenarios of the technical solution of the present application include: a communication scenario between the first device and the second device, a communication scenario between the first device and the first device, and a communication scenario between the second device and the second device.
  • the first device may be an STA.
  • STAs can have different names, such as subscriber unit, access terminal, mobile station, mobile station, mobile device, terminal, user equipment, and so on.
  • STAs can be cellular phones, smart phones, wireless local loops (WLL), and other handheld devices and computer devices with wireless local area network communication functions.
  • the second device may be a base station, PCP or AP.
  • APs can be wireless routers, wireless transceivers, wireless switches, etc.
  • the technical solution of the present application is mainly introduced from the communication scenario between the first device and the second device, and technical solutions in other scenarios can be implemented with reference to the communication scenario between the first device and the second device.
  • a radar test method provided by an embodiment of this application includes:
  • the first device generates a second type of scan frame, where the second type of scan frame includes a radar signal.
  • the second type scanning frame may be a second type short SSW frame or a second type SSW frame.
  • the embodiments of the present application refer to the short SSW frame/SSW frame in the prior art as the first type scanning frame. It can be understood that the second type of scanning frame is equivalent to a combination of the first type of scanning frame and the radar signal. Compared to the first type of scan frame, the second type of scan frame can be used for radar testing.
  • the radar signal carried in the second type of scanning frame can be realized by using the existing information in the current short SSW/SSW frame.
  • the radar signal carried in the second type of scanning frame may be carried in a new independent field (or called a bit field).
  • This embodiment of the application does not limit the position of the field used to carry radar signals in the second type of scanning frame.
  • the field carrying radar signals may be located at the beginning, middle, or end of the second type of scanning frame.
  • FIG. 4 a schematic diagram of a radar signal in the head of a second type scanning frame provided by an embodiment of this application.
  • FIG. 5 a schematic diagram of a radar signal in the middle of a second-type scanning frame provided by an embodiment of this application.
  • FIG. 6 a schematic diagram of a radar signal at the end of a second-type scanning frame provided by an embodiment of this application.
  • the radar signal may be a sequence or data used for radar testing, and the embodiment of the present application is not limited thereto.
  • the first device sends one or more scan frames of the second type in the beamforming training phase.
  • the beamforming training stage can be A-BFT.
  • A-BFT includes multiple sector scan time slots (an SSW slot, aSSSlotTime)
  • step S102 can also be specifically implemented as: the first device sends one or more second Type scan frame.
  • the first device before sending the second type of scan frame, the first device needs to determine the number of the second type of scan frame sent in a sector scan time slot. In this way, the first device can send a corresponding number of scan frames of the second type in the sector scan time slot to implement beamforming training.
  • the number of sent scan frames of the second type in a sector scan slot is referred to as the number of sent scan frames of the second type in the following, which will be described in a unified manner, and will not be repeated hereafter.
  • the first device may determine the number of sent scan frames of the second type according to the FSS value.
  • the FSS value may be indicated by the second device.
  • the second device sends a beacon frame to the first device, and the beacon frame includes the FSS value.
  • the first device determines the number of frames sent of the second type according to the FSS value, including the following implementation manners:
  • Implementation manner 1 The first device determines the number of sent scan frames of the second type according to the FSS value and the first correspondence.
  • the first correspondence is the correspondence between the FSS value and the number of sent scan frames of the second type. It should be noted that the first correspondence relationship may be pre-configured or defined in the standard, which is not limited in the embodiment of the present application.
  • the first corresponding relationship may be as shown in Table 2 below.
  • a, b, c, d, e, f, g, h, i, j, k, l, n, m, o, p, A, B, C, D, E, F, G, H, I, J, K, L, N, M, O, and P are all integers greater than or equal to zero.
  • the first correspondence relationship may be as shown in some columns in Table 3.
  • Table 3 not only shows the correspondence between the FSS value and the number of sent scan frames of the second type, but also shows the correspondence between the FSS value and the number of sent scan frames of the first type.
  • the time length of the radar signal in the second type of scanning frame may be pre-configured, or may be determined by the first device according to the following formula (1).
  • the first device can determine the time length of the radar signal in the second type of scanning frame according to the following formula (1).
  • TXTIME radar signal
  • TXTIME first type scan frame
  • SBIFS the interval between short beam forming frames
  • x represents the first type corresponding to the FFS value
  • y represents the number of sent second type scan frames corresponding to the FSS value.
  • the first device determines the number of scanned frames of the second type to be sent according to the FSS value, the length type of the radar signal, and the second correspondence relationship.
  • the second correspondence is the correspondence between the FSS value, the length type of the radar signal, and the number of sent scan frames of the second type. It should be noted that the second correspondence relationship may be pre-configured or defined in the standard, and the embodiment of the present application is not limited thereto.
  • the second correspondence can also be expressed as: the correspondence between the length type of the radar signal and the first correspondence. That is, for the first device, there is a first corresponding relationship that matches the length type of each radar signal. In this case, the first device determines the number of scan frames sent of the second type according to the FSS value, the length type of the radar signal, and the second correspondence. This can be specifically implemented as follows: the first device according to the length type of the radar signal, The first corresponding relationship that matches the length type of the radar signal is determined; then, the first device determines the number of sent scan frames of the second type according to the FSS value and the first corresponding relationship that matches the length type of the radar signal.
  • the length type of the radar signal is used to directly indicate the time length of the radar signal.
  • the length type of each radar signal directly indicates the time length of a radar signal.
  • the length type of the radar signal includes a first length type, a second length type, and a third length type.
  • the time length of the radar signal indicated by the first length type is 4 us
  • the time length of the radar signal indicated by the second length type is 8 us
  • the time length of the radar signal indicated by the third length type is 12 us.
  • the first corresponding relationship matching the first length type may be shown in Table 4 below.
  • the first corresponding relationship matching the second length type may be shown in Table 5 below.
  • the first corresponding relationship matching the third length type may be shown in Table 6 below.
  • the number of sent scan frames of the second type may also be 1.
  • the length type of the radar signal is used to indicate the time length of the radar signal indirectly.
  • the length type of the radar signal is used to characterize the range of the time length of the radar signal.
  • the length type of the radar signal includes a first length type, a second length type, and a third length type.
  • the first length type corresponds to the first value range
  • the second length type corresponds to the second value range
  • the third length type corresponds to the third value range.
  • the first value range is smaller than the second value range
  • the second value range is smaller than the third value range.
  • the first value range may be 0-4.9us
  • the second value range may be 0-19.6us
  • the third value range may be 0-29.4us.
  • Table 7 shows the corresponding first correspondence and the time length of the radar signal corresponding to each FSS value.
  • Table 8 shows the corresponding first correspondence and the time length of the radar signal corresponding to each FSS value.
  • Table 9 shows the corresponding first correspondence and the time length of the radar signal corresponding to each FSS value.
  • Implementation mode 3 The first device determines the number of sent scan frames of the second type according to the time length of the radar signal and the FSS value.
  • the time length of the radar signal may be pre-configured.
  • the second device sends a beacon frame to the first device, and the beacon frame includes the time length of the radar signal.
  • the time length of the radar signal is defined in the standard.
  • the time length of the radar signal is determined by the first device according to actual application scenarios.
  • the number of sent scan frames of the second type may be determined according to the following formula (2):
  • m represents the number of sent scan frames of the second type. Indicates rounding down.
  • Implementation manner 4 The first device determines the number of sent scan frames of the second type according to the maximum value of the time length of the radar signal and the FSS value.
  • the maximum value of the time length of the radar signal may be pre-configured.
  • the second device sends a beacon frame to the first device, and the beacon frame includes the maximum value of the time length of the radar signal.
  • the maximum value of the time length of the radar signal is defined in the standard.
  • the maximum value of the time length of the radar signal is determined by the first device according to the actual application scenario.
  • the number of sent scan frames of the second type may be determined according to the following formula (3):
  • TXTIME radar signal max
  • Implementation manner 5 The first device determines the number of sent scan frames of the second type according to the minimum time length of the radar signal and the FSS value.
  • TXTIME radar signal min
  • the third, the fourth, and the fifth when the first device sends the second type of short SSW frame, the above formulas (1), (2), (3), (4)
  • the parameter TXTIME (first type scan frame) in can be replaced with TXTIME (shortSSW).
  • TXTIME (shortSSW) represents the time length of the first type of short SSW frame.
  • the parameter TXTIME (first type scan frame) in the above formulas (1), (2), (3), (4) can be replaced with TXTIME (SSW).
  • TXTIME (SSW) represents the time length of the first type of SSW frame.
  • the sector scan time slot can be calculated according to the formula in the prior art.
  • Implementation mode 6 The first device determines the number of scan frames of the first type to be sent according to the FSS value and the relationship between the FSS value and the number of scan frames of the first type, and then determines the number of scan frames of the second type. number. That is to say, for the same FSS value, the number of sent scan frames of the first type and the number of sent scan frames of the second type are the same.
  • the sector scan time slot can be determined according to the following formula (5):
  • aSSSlotTime represents the time length of the sector scan slot.
  • aAirPropagationTime represents the propagation delay between the first device and the second device.
  • assduration represents the time required for the first device to transmit the first type of scan frame under the corresponding FSS value
  • radar signal length represents the time length of the radar signal in the second type of scan frame
  • N represents the number of sent second type scan frames
  • aSSFBDuration represents The time required for the second device to perform the SSW feedback process.
  • MBIFS represents the medium beamforming interframe interval.
  • the time length of the sector scan time slot determined based on formula (5) is larger. That is, the embodiment of the present application expands the length of the sector scan time slot, so that the number of the second type of scan frames sent by the first device that conducts the radar test can be equal to that of the first device that does not conduct the radar test. The number of scanning frames of the first type is the same, so as to ensure that the first device performing the radar test can achieve more accurate beamforming training.
  • the first device that does not perform radar testing is in the sector scan time slot, and the first device needs to send the first type of scan frame after sending the additional time length of the radar signal.
  • the same empty packet is used to ensure that the sector scan time slot of the first device not performing the radar test is the same in time length as the sector scan time slot of the first device performing the radar test.
  • the first device can implement radar testing by sending the second type of scanning frame during the beamforming training phase.
  • the technical solution of the present application realizes the process compatibility between beamforming training and radar testing, so that the first device can perform beamforming training and radar testing at the same time, so that there is no need to allocate additional time domain resources for radar testing, which is beneficial to saving information. Make costs and resource costs.
  • the technical solution of the present application can support the realization of radar testing in WLAN.
  • the technical solution shown in Figure 3 can realize single-station radar testing. That is, after the first device sends the second type of scan frame, the first device still needs to receive the reflected wave of the radar signal to complete the radar test. As shown in FIG. 8, STA1 transmits the second type of scanning frame, and STA1 receives the reflected wave of the radar signal.
  • the technical solution shown in Figure 3 can also implement multi-station radar testing. That is, one first device sends the second type of scanning frame, and other first devices receive the reflected wave of the radar signal. As shown in Figure 9, STA1 sends the second type of scanning frame, and STA2 and STA3 receive the reflected wave of the radar signal.
  • a radar test method provided in an embodiment of this application includes the following steps:
  • the second device sends a beacon frame to one or more first devices, so that the one or more first devices receive the beacon frame sent by the second device.
  • the beacon frame includes radar test information.
  • the radar test information includes at least one of the following parameters: radar data feedback type, radar signal length type, and indication information.
  • the radar data feedback type is used to indicate the radar test data to be fed back.
  • the radar data feedback type is used to instruct the first device to feed back the content included in the radar test data.
  • the radar data feedback type may only indicate that the first device feeds back the sampling data of the time domain signal.
  • the radar data feedback type may indicate that the first device feeds back the sampling data of the time domain signal and the FFT spectrum.
  • the length type of the radar signal is used to determine the time length of the radar signal.
  • the length type of the radar signal is used to directly indicate the time length of the radar signal.
  • the length type of the radar signal is used to characterize the value range of the radar signal.
  • Various length types of radar signals may be predefined in the standard, such as a first length type, a second length type, and a third length type, and the embodiment of the present application is not limited thereto.
  • the indication information is used to indicate one or more target first devices, and the target first devices are the first devices that need to perform a radar test.
  • the indication information includes one or more target first device information, and the target first device information may be an association identifier (AID).
  • AID association identifier
  • the indication information may include: a bitmap offset value (bitmap offset) and a partial virtual bitmap (partial virtual bitmap).
  • the bitmap offset value is used to determine the AID corresponding to the first bit in the partial virtual bitmap. For example, if the bitmap offset value is 300, the AID corresponding to the first bit in the partial virtual bitmap is 300.
  • Each bit in the partial virtual bitmap corresponds to an AID, and different bits correspond to different AIDs.
  • the two AIDs corresponding to the two bits are also adjacent.
  • the AID corresponding to the first bit in some virtual bitmaps is 300
  • the AID corresponding to the second bit is 301
  • the AID corresponding to the third bit is 302, and so on, and will not be repeated.
  • the value of each bit is used to indicate whether the first device with the AID corresponding to the bit needs to perform a radar test. For example, in some virtual bitmaps, if the value of a bit is "0", the first device with the AID corresponding to the bit does not need to perform radar testing; if the value of a bit is "1", it has The first device of the AID corresponding to this bit needs to perform a radar test.
  • instruction information may also adopt other implementation manners, and the embodiment of the present application is not limited thereto.
  • the beacon frame is used to instruct the first device to perform a radar test in the beamforming training phase.
  • the beacon frame is used to instruct the first device to send the second type of scanning frame in the beamforming training phase.
  • the beacon frame specifically includes the following two situations:
  • Case 1 The beacon frame is used to instruct the first device with radar test capability to perform radar test in the beamforming training phase.
  • the first device regardless of whether the first device has an association relationship with the second device, when the first device has radar test capability, after the first device receives the beacon frame, the first device performs the beamforming training phase Radar test.
  • the beacon frame includes at least the following bit fields: frame control, duration, basic service set ID (Basic Service Set ID, BSSID), radar element (radar element), and FCS.
  • BSSID Basic Service Set ID
  • radar element radar element
  • FCS FCS
  • the radar unit bit field includes at least the following bit fields: radar parameter and radar signal length type.
  • the radar parameter bit field is used to carry the radar data feedback type.
  • the radar signal length type bit field is used to indicate the length type of the radar signal.
  • the radar parameter bit field includes at least the following bit fields: CSI, before FFT, FFT info, FFT result, and reserved.
  • the CSI bit field is used to indicate whether the first device feeds back CSI.
  • the CSI bit field can be implemented with 1 bit.
  • the value of the CSI bit field is "0", which means that the first device does not need to feed back CSI; the value of the CSI bit field is "1", which means that the first device needs to feed back CSI.
  • the before FFT bit field is used to indicate whether the first device feeds back the sampling data of the time domain signal.
  • the before FFT bit field can be implemented with 1 bit.
  • the value of the before FFT bit field is "0", indicating that the first device does not need to feed back the sampling data of the time domain signal; the value of before FFT bit field is "1", which indicates that the first device needs to feed back the sampling data of the time domain signal .
  • the FFTinfo bit field is used to indicate whether the first device feeds back the FFT spectrum.
  • the FFTinfo bit field can be implemented with 1 bit.
  • the value of the FFTinfo bit field is "0", which means that the first device does not need to feed back the FFT map; the value of the FFTinfo bit field is "1", which means that the first device needs to feed back the FFT map.
  • the FFT result bit field is used to indicate whether the first device feeds back the radar test result.
  • the FFT result bit field can be implemented with 1 bit.
  • the value of the FFT result bit field is "0", which indicates that the first device does not need to feed back the radar test result; the value of the FFT result bit field is "1", which indicates that the first device needs to feed back the radar test result.
  • the CSI bit field may also be called the first indicator bit field
  • the before FFT bit field may also be called the second indicator bit field
  • the FFT info bit field may also be called the third indicator bit field
  • FFT result The bit field may also be referred to as the fourth indication bit field, and the embodiment of the present application is not limited thereto.
  • Case 2 The beacon frame is used to instruct one or more first devices having an association relationship with the second device to perform radar testing in the beamforming training phase.
  • the second device may select a first device with radar test capability from a plurality of first devices having an association relationship with the second device to perform radar test in the beamforming training phase. It should be noted that the first device can establish an association relationship with the second device in the previous BI according to the capability reporting method shown in Figure 13 below, and enable the second device to learn whether the first device has radar test capabilities.
  • FIG. 12 a schematic diagram of a frame structure of a beacon frame provided in an embodiment of this application.
  • the radar unit bit field of the beacon frame shown in FIG. 12 further includes the following bit fields: a bitmap offset value and a part of a virtual bitmap.
  • the beacon frame may not include the indication information.
  • the beacon frame must include indication information.
  • S202 The target first device sends one or more second-type scan frames in the beamforming training phase.
  • the target first device is the first device with radar test capability.
  • the target first device is determined according to the indication information carried in the beacon frame.
  • step S202 reference may be made to the embodiment shown in FIG. 3, which will not be repeated here.
  • the first device that does not perform radar testing performs beamforming training in a traditional manner. That is, the first device that does not perform the radar test sends one or more scan frames of the first type in the beamforming training phase.
  • the second device sends a beacon frame to trigger the first device to perform radar testing in the beamforming training phase, thereby supporting the implementation of radar testing in WLAN.
  • a capability reporting method provided by an embodiment of this application includes the following steps:
  • S301 The first device sends an association request (Association Request) frame to the second device, so that the second device receives the association request frame sent by the first device.
  • association Request Association Request
  • association request frame is used to establish an association relationship between the first device and the second device.
  • association request frame is also used to indicate whether the first device has a radar test capability. It is understandable that the first device with radar testing capability can perform radar testing; the first device without radar testing capability cannot perform radar testing.
  • the association request frame sent by the first device with radar test capability includes radar test capability information.
  • the association request frame sent by the first device without radar test capability does not include radar test capability information.
  • the radar test capability information is used to indicate that the first device has a radar test capability. Further, the radar test capability information may also be used to indicate the relevant information of the first device for radar test, for example: the type of radar supported by the first device. Among them, radar types include: single-station radar, dual-station radar, and multi-station radar.
  • the radar test capability information may be carried in an independent field in the association request frame.
  • the directional multi-gigabit (DMG)/enhanced directional multi-gigabit (EDMG) capability element in the association request frame uses the radar capability (radar capability) field to carry the radar test Ability information.
  • FIG. 14 shows a schematic structural diagram of an EMDG capabilities element in an embodiment of the present application.
  • association request frame includes the radar capability field, it means that the association request frame contains radar test capability information; if the association request frame does not include the radar capability field, it indicates that the association request frame does not include radar test capability information.
  • the second device determines whether the first device has a radar test capability according to the association request frame.
  • the second device can determine that the first device has radar test capability; if the association request frame does not include radar test capability information, the The second device can determine that the first device does not have radar test capability.
  • the first device sends an association request frame to the second device during the association phase, and the association request frame may be used to indicate whether the first device has the radar test capability.
  • the second device can learn whether the first device can perform radar testing according to the association request frame, thereby avoiding the second device from scheduling the first device without radar testing capability to perform radar testing, thereby ensuring the radar test process Can be executed normally.
  • the technical solution shown in FIG. 13 can make the reporting process of the radar capability compatible with the existing correlation process, so that the first device does not need to perform additional steps.
  • a feedback method for radar test data provided in this embodiment of the application includes the following steps:
  • the first device sends radar test data to the second device in the first SP, so that the second device receives the radar test data sent by the first device in the first SP.
  • the first SP is the SP used to feed back the radar test data.
  • the process of determining the first SP may refer to steps S501-S503.
  • the second device sends a poll frame to the first device in the ATI phase, so that the first device receives the poll frame sent by the second device in the ATI phase.
  • the polling frame is used to trigger the first device to send the SPR frame.
  • S502 The first device sends a service period request (SPR) frame to the second device in the ATI phase, so that the second device receives the SPR frame sent by the first device in the ATI phase.
  • SPR service period request
  • the SPR frame is used to request the second device to allocate the first SP to the first device.
  • the SPR frame is used to request feedback of radar test data.
  • FIG. 16 it is a schematic diagram of the frame structure of the SPR frame.
  • the SPR frame includes the following bit fields: frame control (frame control), duration (duration), receiving address (RA), transmitting address (TA), dynamic allocation information (dynamic allocation info), beamforming Control (BF control) and frame check sequence (FCS).
  • frame control frame control
  • duration duration
  • RA receiving address
  • TA transmitting address
  • TA dynamic allocation information
  • dynamic allocation info dynamic allocation info
  • BF control beamforming Control
  • FCS frame check sequence
  • the dynamic allocation information bit field includes at least the following bit fields: traffic identifier (TID), allocation type (allocation type), source (source) AID, destination (destination) AID, allocation duration (allocation duration), And reserved (reserved).
  • TID traffic identifier
  • allocation type allocation type
  • source source
  • destination destination
  • allocation duration allocation duration
  • allocation duration allocation duration
  • reserved reserved
  • the SPR frame provided in the embodiment of this application plans a new combination (or called value) in the allocation type bit field to indicate that the SPR frame is used to request the second device Assign the SP used to feed back the radar test data to the first device.
  • allocation type bit field consists of 3 bits, the first bit can be recorded as Bit4, the second bit can be recorded as Bit5, and the third bit can be recorded as Bit6.
  • each bit in the allocation type bit field and the corresponding meaning can refer to Table 10.
  • allocation type bit field of the SPR frame may also adopt other preset values (for example, "111") to indicate the meaning "Radar-SP for radar data feedback”.
  • S503 The second device sends an announcement frame to the first device in the ATI phase, so that the first device receives the announcement frame sent by the first device in the ATI phase.
  • the announcement frame includes the information of the first SP.
  • the first device sends radar test data to the second device at a predetermined first SP, so that the second device can obtain the radar test data.
  • FIG. 10 The technical solutions shown in FIG. 10, FIG. 13 and FIG. 15 will be described in detail below with reference to FIG. 17 by way of example.
  • the AP sends a beacon frame to STA1 to instruct STA1 to perform radar testing in the beamforming training phase.
  • STA1 sends the second type scan frame in the form of sector scan. After that, the AP will execute SSW feedback. STA1 performs SSW ACK.
  • STA1 and AP send an association request frame to each other to establish an association request frame between STA1 and AP.
  • the association request frame sent by STA1 may include radar test capability information, so that the AP knows that STA1 has radar test capability. If there is an association relationship between STA1 and AP, the process of sending association request frames between STA1 and AP can be omitted.
  • the AP can send a polling frame to STA1.
  • STA1 sends an SPR frame to the AP to request the AP to allocate an SP for feedback of radar test data.
  • the AP sends an announcement frame to STA1, and the announcement frame includes information about the SP used to feed back the radar test data.
  • STA1 actively feeds back the radar test data in the SP used to feed back the radar test data.
  • a radar test method provided by an embodiment of this application includes the following steps:
  • the second device sends a first indication frame to M first devices, so that the M first devices receive the first indication frame.
  • each of the M first devices has a radar test capability. It is understandable that the second device can determine whether a first device has the radar test capability according to the technical solution shown in FIG. 13.
  • the second device sends the first indication frame to M first devices in the ATI phase.
  • each of the M first devices receives the first indication frame sent by the second device in the ATI phase.
  • M is a positive integer.
  • the first indication frame is used to indicate the scheduling information of the radar test.
  • the scheduling information of the radar test includes one of the following parameters: radar data feedback type, radar SP information, radar receiving and sending control information.
  • the information of the radar SP includes at least the information of the second SP and the information of the third SP.
  • the second SP is the SP used for radar testing.
  • the third SP is the SP used to feed back the radar test data.
  • the information of the radar SP may include: time domain resources of the second SP, time domain resources of the third SP, and so on.
  • the radar transceiver control information is used to indicate the function of each first device in the M first devices during the radar test. In other words, the radar transceiver control information is used to indicate whether each of the M first devices is the receiving end or the transmitting end of the radar. In other words, the radar transceiver control information is used to indicate the first device as the radar receiving end and the first device as the radar transmitting end among the M first devices.
  • the first indication frame further includes the radar test type.
  • Radar test types include: single-station radar test and multi-station radar test.
  • the first indication frame includes at least one of the following bit fields: frame control, duration, sending address, receiving address, radar test type, radar element, and frame check sequence.
  • the radar unit bit field includes at least the following bit fields: radar parameters, radar SP, and radar sender/receiver control (radar sender/receiver control).
  • radar parameter bit field can refer to the related description above (for example, the related description of the radar parameter bit field in the beacon frame shown in FIG. 12), which will not be repeated here.
  • the radar SP bit field is used to carry radar SP information.
  • the radar transmit/receive control bit field is used to carry radar information.
  • the M first devices send first response frames to the second device respectively, so that the second device accepts the first response frames sent by the M first devices respectively.
  • the first response frame is used to respond to the first indication frame.
  • the first response frame is used to indicate that the first device has received the first indication frame.
  • the first device sends a first response frame to the second device in the ATI phase.
  • the second device receives the first response frame sent by the first device in the ATI phase.
  • the second device sends a second indication frame to N first devices, so that the N first devices receive the second indication frame sent by the second device.
  • the second indication frame is used to instruct the N first devices to perform a radar test.
  • the second indication frame may be implemented in the form of a trigger frame.
  • N first devices are a subset of the M first devices.
  • N is a positive integer less than or equal to M.
  • the second device sends a second indication frame to N first devices in the second SP.
  • each of the N first devices receives the second indication frame sent by the second device in the second SP.
  • the N first devices perform a radar test according to the scheduling information of the radar test.
  • the N first devices perform a radar test in the second SP. Specifically, for any first device among the N first devices, if the first device serves as the transmitter of the radar, the first device sends radar signals in a sector scan mode; if the first device serves as a radar The first device receives the radar signal in a quasi-omnidirectional manner.
  • each of the N first devices may send second response information to the second device.
  • the second response information is used to indicate that the first device has Complete the radar test.
  • step S603 and step S604 can be performed multiple times. That is, the second device may send the second indication frame to the N first devices multiple times, so that the N first devices perform multiple rounds of radar testing.
  • the first device as the radar transmitting end may be different. For example, during the first round of radar testing, STA1 sends radar signals, and STA2 and STA3 receive radar signals. In the second round of radar testing, STA2 sends radar signals, and STA3 and STA4 receive radar signals.
  • the second device sends the first indication frame, so that multiple first devices learn the scheduling information of the radar test. After that, the second device sends a second indication frame to the first device to uniformly schedule multiple first devices to perform radar tests according to the radar test scheduling information, thereby realizing multi-station radar testing.
  • a method for feeding back radar test data includes the following steps:
  • the second device sends a third indication frame to the first device that performs the radar test, so that the first device that performs the radar test receives the third indication frame.
  • the third instruction frame is used to instruct the first device performing radar test to feed back radar test data.
  • the third indication frame may be implemented in the form of a trigger frame or a polling frame.
  • the second device sends a third indication frame to the first device performing the radar test in the third SP.
  • the first device performing the radar test receives the third indication frame sent by the second device in the third SP.
  • the first device that performs the radar test sends radar test data to the second device, so that the second device receives the radar test data.
  • the first device that performs the radar test sends radar test data to the second device in the third SP.
  • the second device receives the radar test data sent by the first device performing the radar test in the third SP.
  • the second device sends a third indication frame to the first device, so that the first device feeds back the radar test data.
  • the second device can synthesize the radar test data fed back by the multiple first devices to effectively analyze the relevant information (such as the spatial position) of the measured object.
  • FIGS. 18 and 20 will be described in detail below with reference to FIG. 21 by way of example.
  • the AP sends the first indication frame to STA1, STA2, and STA3; after that, STA1, STA2, and STA3 respectively send the first response frame to the AP.
  • STA1 sends radar signals in a sector scan manner
  • STA2 and STA3 receive radar signals in a quasi-omnidirectional manner
  • STA2 sends radar signals in a sector scan manner
  • STA1 and STA3 receive radar signals in a quasi-omnidirectional manner
  • STA3 sends radar signals in a sector scan manner
  • STA1 and STA2 receive radar signals in a quasi-omnidirectional manner.
  • the AP sends third indication frames to STA1, STA2, and STA3 respectively; STA1, STA2, and STA3 respectively send radar test data to the AP.
  • each network element such as the first device and the second device, in order to implement the above-mentioned functions, includes a hardware structure and/or software module corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiment of the present application may divide the device into functional modules according to the foregoing method examples.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function:
  • FIG. 22 is a schematic structural diagram of a communication device provided by an embodiment of this application. As shown in FIG. 22, the communication device includes: a processing unit 101 and a communication unit 102.
  • the communication device can execute the following scheme one or two.
  • the processing unit 101 is configured to generate a second type of scan frame, where the second type of scan frame includes a radar signal.
  • the communication unit 102 is configured to send one or more scan frames of the second type during the beamforming training phase.
  • the processing unit 101 is further configured to determine the number of sent scan frames of the second type according to the FSS value.
  • the FSS value may be determined according to the beacon frame sent by the second device.
  • the processing unit 101 is specifically configured to determine the number of sent scan frames of the second type according to the FSS value and the first correspondence; wherein, the first correspondence is the FSS value and the Correspondence between the number of sent scan frames of the second type.
  • the second type scan frame is a second type sector scan SSW frame, or a second type short sector scan short SSW frame.
  • the first corresponding relationship may be as shown in Table 2 above.
  • the time length of the radar signal in the second type of scanning frame is determined according to the following formula:
  • TXTIME radar signal
  • TXTIME first type scan frame
  • SBIFS the interval between short beam forming frames
  • x the first type corresponding to the FSS value
  • y represents the number of sent second type scan frames corresponding to the FSS value.
  • the processing unit 101 is specifically configured to determine the number of sent scan frames of the second type according to the FSS value and the time length of the radar signal.
  • the number of sent scan frames of the second type is determined according to the following formula:
  • m represents the number of sent scan frames of the second type.
  • the processing unit 101 is specifically configured to determine the number of sent scan frames of the second type according to the FSS value, the length type of the radar signal, and the second correspondence; where the second correspondence is Correspondence between the FSS value, the length type of the radar signal, and the number of sent scan frames of the second type.
  • the sector scan slot is determined according to the following formula:
  • aSSSlotTime aAirPropagationTime+assduration+radar signal length*N+MBIFS+aSSFBDuration+MBIFS;
  • aSSSlotTime represents the time length of the sector scan slot.
  • aAirPropagationTime represents the propagation delay between the first device and the second device.
  • assduration represents the time required for the first device to transmit the first type of scan frame under the corresponding FSS value
  • radar signal length represents the time length of the radar signal in the second type of scan frame
  • N represents the number of sent second type scan frames
  • aSSFBDuration represents The time required for the second device to perform the SSW feedback process.
  • MBIFS represents the medium beamforming interframe interval.
  • the communication unit 102 is further configured to receive a beacon frame sent by the second device, where the beacon frame includes radar test information.
  • the radar test information includes at least one of the following parameters: radar data feedback type, radar signal length type, and indication information.
  • radar data feedback type is used to indicate the radar test data to be fed back.
  • the length type of the radar signal is used to determine the time length of the radar signal.
  • the indication information is used to indicate one or more first devices that need to perform a radar test.
  • the communication unit 102 is further configured to send radar test data to the second device in the first SP, and the first SP is an SP used to feed back the radar test data.
  • the communication unit 102 is further configured to send an association request frame to the second device, where the association request frame is used to indicate whether the first device has a radar test capability.
  • the communication unit 102 is configured to receive a first indication frame sent by the second device, where the first indication frame is used to indicate the scheduling information of the radar test; send a first response frame to the second device, and the first response frame is used to respond to the first An indication frame; receiving a second indication frame sent by the second device, the second indication frame used to instruct the first device to perform a radar test.
  • the processing unit 101 is configured to perform radar testing according to the scheduling information of the radar testing.
  • the radar test scheduling information includes at least one of the following parameters: radar SP information, radar data feedback type, and radar transceiver control information.
  • the information of the radar SP includes the information of the second SP and the information of the third SP
  • the second SP is the SP used for radar testing
  • the third SP is the SP used to feed back radar test data.
  • the radar data feedback type is used to indicate the radar test data to be fed back.
  • the radar transceiver control information is used to indicate the function of each first device in the radar test among the M first devices, and M is a positive integer.
  • the communication unit 102 is specifically configured to receive the second indication frame sent by the second device in the second SP.
  • the communication unit 102 is specifically configured to perform a radar test according to the radar test scheduling information in the second SP.
  • the processing unit 101 is specifically configured to send radar signals in a sector scan mode if the first device is used as the transmitting end of the radar; if the first device is used as the receiving end of the radar, then Receive radar signals in a quasi-omnidirectional manner.
  • the communication unit 102 is further configured to send second response information to the second device in the second SP, and the second response information is used to indicate that the first device has completed the radar test.
  • the communication unit 102 is further configured to receive third indication information sent by the second device, and the third indication information is used to instruct the first device to feed back the radar test data; and send the radar test data to the second device.
  • the communication unit 102 is specifically configured to receive the third indication information sent by the second device in the third SP.
  • the communication unit 102 is specifically configured to send radar test data to the second device in the third SP.
  • the communication unit 102 is further configured to send an association request frame to the second device, where the association request frame is used to indicate whether the first device has a radar test capability.
  • the communication device can execute the following scheme three or four.
  • the processing unit 101 is configured to generate a beacon frame, the beacon frame including radar test information.
  • the communication unit 102 is configured to send a beacon frame to one or more first devices.
  • the radar test information includes at least one of the following parameters: radar data feedback type, radar signal length type, and indication information.
  • radar data feedback type is used to indicate the radar test data to be fed back.
  • the length type of the radar signal is used to determine the time length of the radar signal.
  • the indication information is used to indicate one or more first devices that need to perform a radar test.
  • the beacon frame further includes an FSS value, and the FSS value is used to determine the number of sent scan frames of the second type.
  • the time length of the radar signal in the second type of scanning frame is determined according to the following formula:
  • TXTIME radar signal
  • TXTIME first type scan frame
  • SBIFS the interval between short beam forming frames
  • x the first type corresponding to the FSS value
  • y represents the number of sent second type scan frames corresponding to the FSS value.
  • the number of sent scan frames of the second type is determined according to the FSS value and the time length of the radar signal.
  • the number of sent scan frames of the second type is determined according to the following formula:
  • m represents the number of sent scan frames of the second type.
  • the sector scan time slot is determined according to the following formula:
  • aSSSlotTime aAirPropagationTime+assduration+radar signal length*N+MBIFS+aSSFBDuration+MBIFS;
  • aSSSlotTime represents the time length of the sector scan slot.
  • aAirPropagationTime represents the propagation delay between the first device and the second device.
  • assduration represents the time required for the first device to transmit the first type of scan frame under the corresponding FSS value
  • radar signal length represents the time length of the radar signal in the second type of scan frame
  • N represents the number of sent second type scan frames
  • aSSFBDuration represents The time required for the second device to perform the SSW feedback process.
  • MBIFS represents the medium beamforming interframe interval.
  • the communication unit 102 is further configured to receive radar test data sent by the first device in a first SP, where the first SP is an SP used to feed back the radar test data.
  • the communication unit 102 is further configured to receive an association request frame sent by the first device, and the association request frame is used to indicate whether the first device has a radar test capability.
  • the processing unit 101 is further configured to determine whether the first device has radar test capability according to the association request frame.
  • the processing unit 101 is configured to generate a first indication frame.
  • the communication unit 102 is configured to send a first indication frame to M first devices, where the first indication frame is used to indicate the scheduling information of the radar test, and M is a positive integer; each of the M first devices receives the The first response frame sent by the device, the first response frame is used to respond to the first indication frame; the second indication frame is sent to N first devices, and the second indication frame is used to instruct the first device to perform a radar test.
  • the device is a subset of M first devices, and N is a positive integer less than or equal to M.
  • the scheduling information of the radar test includes at least one of the following parameters: radar SP information, radar data feedback type, and radar transceiver control information.
  • the information of the radar SP includes the information of the second SP and the information of the third SP.
  • the second SP is the SP used for radar testing, and the third SP is the SP used to feed back radar test data.
  • the radar data feedback type is used to indicate the radar test data to be fed back.
  • the radar transceiver control information is used to indicate the function of each of the M first devices in the radar test, and M is a positive integer.
  • the communication unit 102 is specifically configured to send a second indication frame to N first devices in the second SP.
  • the communication unit 102 is specifically configured to receive the second response information sent by the first device in the second SP, and the second response information is used to indicate that the first device has completed the radar test.
  • the communication unit 102 is further configured to send third indication information to the first device, and the third indication information is used to instruct the first device to feed back the radar test data; to receive the radar test data sent by the first device.
  • the communication unit 102 is specifically configured to send the third indication information to the first device in the third SP.
  • the communication unit 102 is specifically configured to receive the radar test data sent by the first device in the third SP.
  • the communication unit 102 is further configured to receive an association request frame sent by the first device, where the association request frame is used to indicate whether the first device has a radar test capability.
  • the processing unit 101 is further configured to determine whether the first device has radar test capability according to the association request frame.
  • the communication device provided in the above embodiments of the present application can be implemented in a variety of product forms.
  • the communication device can be configured as a general processing system; for another example, the communication device can be implemented by a general bus architecture; For another example, the communication device may be implemented by an application specific integrated circuit (ASIC).
  • ASIC application specific integrated circuit
  • FIG. 23 is a result diagram of possible product forms of the communication device according to the embodiment of the present application.
  • the communication device described in the embodiment of the present application may be a communication device, and the communication device includes a processor 201 and a transceiver 202.
  • the communication device further includes a storage medium 203.
  • the processor 201 is configured to perform step S101 in FIG. 3, and the transceiver 202 is configured to perform step S102 in FIG. 3.
  • the transceiver 202 is configured to perform steps S201 and S202 in FIG. 10.
  • the transceiver 202 is configured to perform step S301 in FIG. 13.
  • the transceiver 202 is configured to perform steps S501, S502, S503, and S401 in FIG. 15.
  • the transceiver 202 is configured to execute steps S601, S602, and S603 in FIG. 18, and the processor 201 is configured to execute step S604 in FIG. 18.
  • the transceiver is used to perform steps S701 and S702 in FIG. 20.
  • the transceiver 202 is used to perform step S201 in FIG. 10.
  • the transceiver 202 is configured to execute step S301 in FIG. 13, and the processor 201 is configured to execute step S302 in FIG. 13.
  • the transceiver 202 is configured to perform steps S501, S502, S503, and S401 in FIG. 15.
  • the transceiver 202 is configured to perform steps S601, S602, and S603 in FIG. 18.
  • the transceiver is used to perform steps S701 and S702 in FIG. 20.
  • the communication device described in the embodiment of the present application may also be implemented by a general-purpose processor or a special-purpose processor, that is, a chip commonly called.
  • the chip includes: a processing circuit 201 and a transceiver pin 202.
  • the chip may also include a storage medium 203.
  • the processing circuit 201 is used to perform step S101 in FIG. 3, and the transceiver pin 202 is used to perform step S102 in FIG. 3.
  • the transceiver pin 202 is used to perform steps S201 and S202 in FIG. 10.
  • the transceiver pin 202 is used to perform step S301 in FIG. 13.
  • the transceiver pin 202 is used to perform steps S501, S502, S503, and S401 in FIG. 15.
  • the transceiver pin 202 is used to execute steps S601, S602, and S603 in FIG. 18, and the processing circuit 201 is used to execute step S604 in FIG. 18.
  • the transceiver pins are used to perform steps S701 and S702 in FIG. 20.
  • the transceiver pin 202 is used to perform step S201 in FIG. 10.
  • the transceiver pin 202 is used to execute step S301 in FIG. 13, and the processing circuit 201 is used to execute step S302 in FIG. 13.
  • the transceiver pin 202 is used to perform steps S501, S502, S503, and S401 in FIG. 15.
  • the transceiver pin 202 is used to perform steps S601, S602, and S603 in FIG. 18.
  • the transceiver pins are used to perform steps S701 and S702 in FIG. 20.
  • the communication device described in the embodiments of this application can also be implemented using the following circuits or devices: one or more field programmable gate arrays (FPGA), programmable logic A programmable logic device (PLD), a controller, a state machine, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application.
  • FPGA field programmable gate arrays
  • PLD programmable logic A programmable logic device
  • controller a state machine
  • gate logic discrete hardware components
  • any other suitable circuits any combination of circuits capable of performing the various functions described throughout this application.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un dispositif de test de radar, se rapportant au domaine de la technologie de communication, utilisé pour prendre en charge un test radar dans un WLAN. Le procédé comprend : la génération par un premier appareil d'un second type de trame de balayage, le second type de trame de balayage comprenant des signaux radar (S101) ; l'envoi par le premier appareil d'un ou plusieurs second(s) type(s) de trames de balayage dans la phase d'entraînement de formation de faisceau (S102). Ainsi, un test radar peut être compatible avec le processus d'entraînement de formation de faisceau sans avoir besoin d'attribuer de façon supplémentaire des ressources de domaine temporel correspondantes pour un test radar.
PCT/CN2020/093740 2019-05-30 2020-06-01 Procédé et dispositif de test de radar WO2020239125A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220022056A1 (en) * 2020-07-14 2022-01-20 Qualcomm Incorporated Using base stations for air-interface-based environment sensing without user equipment assistance
WO2022241385A1 (fr) * 2021-05-12 2022-11-17 Google Llc Signalisation de commande destinée à une détection radar monostatique
WO2023236179A1 (fr) * 2022-06-10 2023-12-14 Qualcomm Incorporated Détection de rapport de capacité de traitement dans une détection bistatique ou multistatique assistée par équipement d'utilisateur (ue)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116847394A (zh) * 2022-03-21 2023-10-03 华为技术有限公司 感知方法及装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014099005A1 (fr) * 2012-12-21 2014-06-26 Intel Corporation Techniques pour la prise en charge de largeurs de bande de canal variables
CN106028352A (zh) * 2016-05-12 2016-10-12 西南交通大学 一种无线探测与通信融合的区域危险预警系统与方法
CN106817134A (zh) * 2016-10-25 2017-06-09 张慧 一种可配置的全双工无线网络雷达通信系统
CN108023627A (zh) * 2016-11-03 2018-05-11 华为技术有限公司 波束赋形训练方法及装置
CN109819519A (zh) * 2017-11-20 2019-05-28 华为技术有限公司 一种数据传输方法及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014099005A1 (fr) * 2012-12-21 2014-06-26 Intel Corporation Techniques pour la prise en charge de largeurs de bande de canal variables
CN106028352A (zh) * 2016-05-12 2016-10-12 西南交通大学 一种无线探测与通信融合的区域危险预警系统与方法
CN106817134A (zh) * 2016-10-25 2017-06-09 张慧 一种可配置的全双工无线网络雷达通信系统
CN108023627A (zh) * 2016-11-03 2018-05-11 华为技术有限公司 波束赋形训练方法及装置
CN109819519A (zh) * 2017-11-20 2019-05-28 华为技术有限公司 一种数据传输方法及装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220022056A1 (en) * 2020-07-14 2022-01-20 Qualcomm Incorporated Using base stations for air-interface-based environment sensing without user equipment assistance
WO2022241385A1 (fr) * 2021-05-12 2022-11-17 Google Llc Signalisation de commande destinée à une détection radar monostatique
WO2023236179A1 (fr) * 2022-06-10 2023-12-14 Qualcomm Incorporated Détection de rapport de capacité de traitement dans une détection bistatique ou multistatique assistée par équipement d'utilisateur (ue)

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