WO2021134593A1 - Wi-Fi信道测量方法、装置和系统 - Google Patents

Wi-Fi信道测量方法、装置和系统 Download PDF

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Publication number
WO2021134593A1
WO2021134593A1 PCT/CN2019/130772 CN2019130772W WO2021134593A1 WO 2021134593 A1 WO2021134593 A1 WO 2021134593A1 CN 2019130772 W CN2019130772 W CN 2019130772W WO 2021134593 A1 WO2021134593 A1 WO 2021134593A1
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WIPO (PCT)
Prior art keywords
sta
trigger frame
cqi
uplink
uplink channel
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PCT/CN2019/130772
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English (en)
French (fr)
Inventor
李帅
李振宇
吴毅凌
胡磊
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201980103269.3A priority Critical patent/CN114846833A/zh
Priority to PCT/CN2019/130772 priority patent/WO2021134593A1/zh
Publication of WO2021134593A1 publication Critical patent/WO2021134593A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements

Definitions

  • This application relates to the field of communication technology, and in particular to a Wi-Fi channel measurement method, device and system.
  • WiFi 6 is the sixth-generation Wi-Fi technology, which absorbs a large number of 5G key technologies, such as MIMO (multiple-input multiple-output, multiple-input multiple-output technology), 1024QAM (quadrature amplitude modulation), OFDMA ( orthogonal frequency division multiple access, orthogonal frequency division multiple access), etc.
  • 5G key technologies such as MIMO (multiple-input multiple-output, multiple-input multiple-output technology), 1024QAM (quadrature amplitude modulation), OFDMA ( orthogonal frequency division multiple access, orthogonal frequency division multiple access), etc.
  • Wi-Fi 6 Compared with Wi-Fi 5, Wi-Fi 6 has achieved a 4 times increase in network bandwidth, a 4 times increase in the number of concurrent users, and a reduction in network delay from an average of 30 ms to 20 ms.
  • MIMO transmission is also called space division multiplexing.
  • MIMO can be divided into SU-MIMO (single-user MIMO, single-user MIMO) and MU-MIMO (multi-user MIMO, multi-user MIMO).
  • SU-MIMO refers to the scheduling of space division multiplexed data streams to a single terminal to improve the terminal's transmission rate and spectrum efficiency.
  • the time-frequency resources allocated to the terminal are exclusively occupied by the terminal.
  • MU-MIMO refers to the scheduling of space-division multiplexed data streams to multiple terminals. Multiple terminals share the same time-frequency resource through space division.
  • the network can obtain additional multi-user diversity gain through multiple terminal scheduling in spatial dimensions.
  • MU-MIMO can significantly improve the throughput and capacity of the network.
  • Wi-Fi 6 supports site backhaul scenarios.
  • Site backhaul includes wired backhaul and wireless backhaul. Compared with wired backhaul, wireless backhaul is flexible in deployment and has cost advantages.
  • both the access point AP and the terminal STA can have multiple antenna capabilities and support uplink or downlink MIMO transmission. In order to support MIMO transmission, it is necessary to measure the channel and determine the uplink weight or the downlink weight. However, the current Wi-Fi channel measurement mechanism cannot fully meet the needs of MIMO transmission.
  • the embodiments of the present application are used to provide a Wi-Fi channel measurement method, device, and system, which are used to meet the measurement requirements of MIMO transmission.
  • an embodiment of the present application provides a Wi-Fi channel measurement method, including: an access point AP sends a trigger frame to a terminal STA, and the trigger frame is used to indicate uplink channel measurement; the AP receives a null channel from the STA.
  • the data packet informs the NDPA; among them, the NDPA is used to indicate partial BW Info, feedback type and subcarrier grouping feedback type and Ng, codebook size, and column number Nc related to the uplink channel measurement; the AP passes The pilot of the null data packet NDP corresponding to the NDPA from the STA is measured to obtain the uplink channel weight; where the uplink channel weight is used for uplink MIMO; the AP sends the uplink channel weight to the STA.
  • the above method realizes the mechanism for AP to trigger the uplink weight measurement, and opens up the uplink weight measurement and feedback channel.
  • the AP drives the STA to perform uplink weight measurement.
  • the weighted weight is converted from the open-loop weight to the closed-loop weight, which can improve the uplink MIMO capacity.
  • the Wi-Fi system currently does not have an open-loop codebook design. Compared with the open-loop weight of the unit array, the closed-loop weight can increase the uplink transmission capacity by 30% to 99% when transmitting with 8 single ports, which meets the needs of MIMO transmission.
  • the value of the trigger type subfield in the common info field of the trigger frame is 0, that is, the trigger frame is the basic trigger frame; where the common info Bit B63 in the field is used to indicate the uplink channel measurement; or, the bit B39 in the user information field of the basic trigger frame is used to indicate the uplink channel measurement; or, the user information of the basic trigger frame Basic Trigger Frame Bit B5 in the trigger dependent user info subfield in the user info field is used to indicate the uplink channel measurement.
  • This embodiment multiplexes the Wi-Fi trigger frame, the modification is small, and the implementation of the solution is relatively simple.
  • the value of the trigger type subfield in the common info field of the trigger frame is a value from 8 to 15; the trigger dependent user information subfield in the user info field of the trigger frame is trigger dependent user info subfield is used to indicate the uplink channel measurement.
  • This embodiment multiplexes the trigger type of the Wi-Fi trigger frame, with minor changes, and reduces the complexity of implementation.
  • the value of the trigger type subfield in the common info field of the trigger frame is a value from 8 to 15; the trigger frame is also used to indicate the partial BW Info, the feedback type and Ng, The codebook size, and the Nc.
  • the AP also indicates measurement and feedback parameters to the STA, which facilitates favorable arrangements for the measurement and reporting of the STA, and makes the measurement more efficient.
  • the trigger dependent user information trigger dependent user info in the user info field of the trigger frame includes the partial BW Info, the feedback type and Ng, the codebook size, and the Nc.
  • This implementation manner provides a solution for how to carry measurement parameters, multiplexes specific fields of the trigger frame, and reduces the implementation complexity.
  • the trigger frame is also used to indicate the number N of the NDP; the AP obtains the uplink channel weight by measuring the pilot of the NDP of the null data packet corresponding to the NDPA from the STA , Including: the AP obtains the uplink channel weight by measuring N pilots of the NDP.
  • the AP obtains the uplink channel weight by measuring N pilots of the NDP, including: the AP obtains N measurement results by measuring the N pilots of the NDP; The AP obtains the uplink channel weight according to the N measurement results.
  • the uplink channel weight is obtained by obtaining N measurement results, so that the measurement results are more objective and accurate, and the impact of sudden interference is small.
  • the trigger dependent user info in the user info field of the trigger frame includes the N.
  • This implementation manner provides a solution for how to carry measurement parameters, multiplexes specific fields of the trigger frame, and reduces the implementation complexity.
  • an embodiment of the application provides a Wi-Fi channel measurement method, including: a terminal STA receives a trigger frame from an access point AP, the trigger frame is used to indicate uplink channel measurement; the STA sends a null to the AP
  • the data packet informs the NDPA; among them, the NDPA is used to indicate partial BW Info, feedback type and subcarrier grouping feedback type and Ng, codebook size, codebook size, and column number Nc related to the uplink channel measurement;
  • the AP sends the null data packet NDP corresponding to the NDPA, and the pilot user of the NDP measures the uplink channel; the STA receives the uplink channel weight from the AP, and the uplink channel weight is used for uplink MIMO.
  • the trigger frame is also used to indicate the number N of the NDP;
  • the STA sending the NDP corresponding to the NDPA to the AP includes: the STA sends N NDPs to the AP.
  • the uplink channel weight is based on the N NDPs.
  • the embodiments of this application provide a Wi-Fi channel measurement method, including: the access point AP sends a downlink physical layer protocol data unit DL PPDU to the terminal STA, and the DL PPDU is used to indicate the reporting configuration of the CQI periodic report ; Wherein, the reporting configuration includes a reporting period; the AP sends a basic trigger frame to the STA according to the reporting period, and the basic trigger frame is used to indicate the uplink resource for reporting CQI; the AP receives from the STA according to the uplink resource The CQI.
  • a periodic CQI reporting mechanism is implemented.
  • the CQI periodically reported by the STA can be referred to, so that downlink scheduling can be performed more accurately.
  • this mechanism does not require the AP to send NDPA and NDP, which saves overhead and improves capacity.
  • the reporting configuration further includes the bandwidth and/or the number of columns related to the foregoing periodic CQI reporting.
  • the AP can obtain a CQI that better meets its needs, which can improve the performance of downlink transmission.
  • the A-control subfield in the HT control field of the data frame of the DL PPDU includes the report configuration.
  • the specific field of the multiplexed data frame is used to carry the report configuration, which reduces the implementation complexity.
  • the AP receiving the CQI from the STA according to the uplink resource includes: the AP receives an A-MPDU from the STA according to the uplink resource, and the A-MPDU includes the CQI and uplink data.
  • the CQI can be sent along with the uplink data, which saves overhead.
  • an embodiment of the present application provides a Wi-Fi channel measurement method, including: a terminal STA receives a downlink physical layer protocol data unit DL PPDU from an access point AP, the DL PPDU is used to indicate the CQI periodic reporting configuration; where The CQI periodic reporting configuration includes a period; the STA measures the downlink channel to obtain the CQI; the STA receives a basic trigger frame from the AP according to the period, and the basic trigger frame is used to indicate the uplink for reporting the CQI Resource; the STA reports the CQI to the AP according to the uplink resource.
  • the reporting configuration further includes the bandwidth and/or the number of columns related to the periodic reporting of the CQI;
  • the STA measures the downlink channel to obtain the CQI, including: the STA measures the downlink channel to obtain the CQI corresponding to the bandwidth and/or the number of columns.
  • the STA reporting the CQI to the AP according to the uplink resource includes: the STA sends an A-MPDU to the AP according to the uplink resource, and the A-MPDU includes the CQI and uplink data.
  • an embodiment of the present application provides an access point, including a processing circuit, which is used to execute instructions to implement the access point side in the above aspects. method.
  • an embodiment of the present application provides a terminal including a processing circuit configured to execute instructions to implement the terminal-side method in the foregoing aspects.
  • embodiments of the present application also provide a computer program product, including instructions, which when executed at an access point, enable the access point to implement the access point-side methods in the foregoing aspects.
  • an embodiment of the present application also provides a computer-readable storage medium, including the above-mentioned computer program product.
  • an embodiment of the present application also provides a Wi-Fi system, including the access point of the fifth aspect and the terminal of the sixth aspect.
  • Figure 1 is a schematic diagram of a Wi-Fi system
  • Figure 2 is a schematic structural diagram of a terminal
  • Figure 3 is a schematic structural diagram of an access point
  • Figure 4 is a schematic flowchart of a Wi-Fi channel measurement method
  • FIG. 5 is a schematic diagram of the frame structure of the trigger frame, the structure of its internal partial fields, and the value of the trigger type subfield;
  • Figure 6 is a schematic diagram of the value of a trigger type subfield
  • Figure 7 is a schematic diagram of measurement and feedback information
  • Figure 8 is a schematic diagram of measurement and feedback information
  • Fig. 9 is a schematic flowchart of another Wi-Fi channel measurement method
  • Figure 10 is a schematic diagram of a data frame carrying a periodic CQI reporting configuration.
  • FIG. 1 shows an architecture diagram of a Wi-Fi system.
  • the Wi-Fi system includes a terminal T100, an access point (AP, access point) B200, and a gateway (gateway).
  • the terminal T100 and the access point B200 can communicate wirelessly through Wi-Fi technology.
  • the access point B200 is connected to the gateway for interaction with external networks.
  • the external network can be the operator's core network, private network, or the Internet of Things.
  • the terminal has the capability of beamforming, can send signals in one or more specific beam directions, and receive signals in one or more specific beam directions;
  • the access point is used to schedule the uplink in the cell Transmission or downlink transmission.
  • the gateway is used to connect to other networks.
  • both the terminal and the access point have multiple antenna capabilities, support MIMO, and support the measurement of downlink channel weights/uplink channel weights.
  • the above-mentioned terminal is also called a station (STA, Station), which is a device capable of performing wireless communication functions using Wi-Fi technology.
  • the terminal in this application may refer to the terminal or the Wi-Fi chip in the terminal.
  • terminals such as cellular phones that support Wi-Fi, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, and personal digital processing ( personal digital assistant (PDA), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices or wearable devices, virtual reality (VR) terminal devices, augmented reality (augmented reality) , AR) terminal equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, and wireless terminals in smart grids , Wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc.
  • the terminal can be mobile or fixed.
  • FIG. 2 is a schematic diagram of a structure of the terminal.
  • the terminal T100 includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the terminal, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. Some types of terminals do not have input and output devices.
  • the processor can read the software program (instruction) in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal out in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • FIG. 2 only shows a memory and a processor. In actual user equipment, there may be multiple processors and multiple memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.
  • the processor may include a baseband processor and/or a central processing unit.
  • the baseband processor is mainly used to process communication protocols and communication data
  • the central processing unit is mainly used to control the entire terminal. Execute the software program and process the data of the software program.
  • the processor in FIG. 2 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit may also be independent processors, which are interconnected by technologies such as a bus.
  • the terminal may include multiple baseband processors to adapt to different network standards.
  • the terminal may include multiple central processors to enhance its processing capabilities.
  • the functions of the baseband processor and the central processing unit can be integrated on one processor for implementation.
  • the various components of the terminal can be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the antenna and radio frequency circuit with the transceiver function may be regarded as the transceiver unit of the terminal, and the processor with the processing function may be regarded as the processing unit of the terminal.
  • the terminal T100 includes a transceiver unit 101 and a processing unit 102.
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, and so on.
  • the processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on.
  • the device for implementing the receiving function in the transceiving unit 101 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiving unit 101 can be regarded as the sending unit, that is, the transceiving unit 101 includes a receiving unit and a sending unit.
  • the receiving unit may also be called a receiver, a receiver, a receiving circuit, etc.
  • the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • the aforementioned access point is a device deployed on a Wi-Fi wireless access network to provide wireless communication functions.
  • the structure of the access point B200 may be as shown in FIG. 3.
  • the access point B200 includes a 201 part and a 202 part.
  • the 201 part is mainly used for the transmission and reception of radio frequency signals and the conversion between radio frequency signals and baseband signals; the 202 part is mainly used for baseband processing and control of access points.
  • Part 201 can generally be called a transceiver unit, transceiver, transceiver circuit, transceiver, and so on.
  • Part 202 can generally be referred to as a processing unit.
  • the 202 part is the control center of the access point.
  • part 201 may include an antenna and a radio frequency unit, where the radio frequency unit is mainly used for radio frequency processing.
  • the device for implementing the receiving function in part 201 can be regarded as the receiving unit, and the device for implementing the sending function as the sending unit, that is, the part 201 includes the receiving unit and the sending unit.
  • the receiving unit may also be called a receiver, a receiver, a receiving circuit, etc.
  • the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • part 202 may include one or more single boards, and each single board may include a processor and a memory.
  • the processor is used to read and execute programs in the memory to implement baseband processing functions and docking. Control of the entry point. If there are multiple boards, each board can be interconnected to increase processing capacity.
  • SoC System-on-chip
  • All or part of the functions of part 202 and part 201 can be implemented by SoC technology, for example,
  • An access point function chip is implemented.
  • the access point function chip integrates the processor, memory, antenna interface and other devices.
  • the program of the access point related functions is stored in the memory, and the program is executed by the processor to realize the access point.
  • the access point function chip can also read a memory external to the chip to implement related functions of the access point.
  • the uplink weight, the uplink channel weight, and the uplink channel weight are sometimes mixed, but they all have the same meaning, that is, they are used for uplink spatial mapping, for example, as an uplink precoding matrix superimposed on multiple streams.
  • downlink weights, downlink channel weights, and downlink channel weights are sometimes mixed, but they all express the same meaning, that is, they are used for downlink spatial mapping, such as being superimposed on multiple streams as a downlink precoding matrix.
  • the WiFi channel measurement method in the embodiment of the present application will be described below in conjunction with the terminal T100 and the access point B200. As shown in Figure 4, the method includes:
  • the access point B200 sends a trigger frame to the terminal T100, where the trigger frame is used to indicate uplink channel measurement.
  • the trigger frame is a data format defined by Wi-Fi.
  • the terminal T100 sends an empty data packet notification to the access point B200.
  • the access point B200 receives a null packet notification from the terminal T100.
  • the empty data packet notification NDPA is used to indicate parameters related to uplink channel measurement, such as: partial bandwidth information partial BW Info, feedback type and subcarrier group feedback type and Ng, codebook size codebook size, and number of columns Nc.
  • partial BW Info is used to indicate the bandwidth range that needs to be fed back
  • feedback type and Ng and Codebook size are used together to indicate the feedback type, subcarrier grouping and codebook format
  • Nc is used to indicate the number of columns of the compressed beamforming feedback matrix. It is set to Nc-1, which in the physical sense is the number of space-time streams measured by the terminal.
  • the terminal T100 After the terminal T100 receives the above trigger frame, it can determine partial BW Info, feedback type and subcarrier grouping feedback type and Ng, codebook size, codebook size, and number of columns Nc related to uplink channel measurement, and notify it through a null data packet To notify the access point B200.
  • S403 The terminal T100 sends a null data packet to the access point B200.
  • the empty data packet NDP corresponds to the above-mentioned NDPA.
  • NDP is sent at SIFS (short interframe space) after NDPA.
  • the access point B200 measures the pilot of the NDP to obtain the uplink channel weight
  • the uplink channel weight is used for uplink MIMO.
  • the access point B200 schedules the terminal T100 to perform uplink transmission through Trigger Frame.
  • the uplink transmission may be multi-stream transmission.
  • the terminal T100 sends the uplink channel weight fed back by the access point B200 when transmitting.
  • the transmitted precoding matrix is superimposed on the multi-stream to be transmitted for spatial mapping (spatial mapping) for transmission.
  • the access point B200 sends the uplink channel weight to the terminal T100.
  • the terminal T100 receives the uplink channel weight from the access point B200.
  • the uplink channel weight measurement mechanism triggered by the access point B200 is realized, and the uplink channel weight measurement and feedback channel is opened.
  • the access point B200 drives the terminal T100 to perform uplink weight measurement.
  • the weighted weight is converted from the open-loop weight to the closed-loop weight, which improves the uplink MIMO capacity; WIFI system
  • WIFI system there is no open-loop codebook design. Compared with the open-loop weight of the unit array, the closed-loop weight can increase the uplink transmission capacity by 30% to 99% when transmitting on 8-port.
  • the trigger type subfield in the common info field of the trigger frame has a value of 0, that is, the trigger frame is a basic trigger frame. frame; Wherein, the bit B63 in the common info field of the basic trigger frame is used to indicate the uplink channel measurement; or, the bit B39 in the user information field of the basic trigger frame is used to indicate the uplink channel measurement; or , Bit B5 in the trigger dependent user info subfield of the user info field of the basic trigger frame is used to indicate the uplink channel measurement.
  • This embodiment multiplexes the Wi-Fi trigger frame, the modification is small, and the implementation of the solution is relatively simple.
  • the value of the trigger type subfield in the common info field of the trigger frame is a value from 8 to 15 ( Figure 6 takes the value 8 as Example); the trigger dependent user info subfield in the user info field of the trigger frame is used to indicate the uplink channel measurement.
  • This embodiment multiplexes the trigger type of the Wi-Fi trigger frame, with minor changes, and reduces the complexity of implementation.
  • the value of the trigger type subfield in the common info field of the trigger frame is a value from 8-15 ( Figure 6 takes The value is 8 as an example); the trigger frame is also used to indicate measurement-related parameters, such as: partial BW Info, feedback type and Ng, codebook size, and the Nc.
  • the AP also indicates measurement and feedback parameters to the STA, which facilitates favorable arrangements for the measurement and reporting of the STA, and makes the measurement more efficient.
  • the trigger dependent user information trigger dependent user information in the user info field of the trigger frame includes the partial BW Info, the feedback type and Ng, the codebook size, and the Nc.
  • This implementation manner provides a solution for how to carry measurement parameters, multiplexes specific fields of the trigger frame, and reduces the implementation complexity.
  • the trigger frame is also used to indicate the number N of NDPs.
  • the terminal T100 sending a null data packet to the access point B200 includes: the terminal T100 sends N null data packets to the access point B200.
  • the access point B200 measures the pilots of the NDP to obtain the uplink channel weights, including: the access point B200 measures the pilots of the N NDPs to obtain the uplink channel weights.
  • an optional implementation manner in which the access point B200 measures the pilots of the N NDPs to obtain the uplink channel weights may include: NDP pilots are measured to obtain N measurement results; the access point B200 obtains uplink channel weights according to the above N measurement results.
  • the uplink channel weight is obtained by obtaining N measurement results, so that the measurement results are more objective and accurate, and the impact of sudden interference is small.
  • the trigger dependent user info in the user info field of the trigger frame may include the above N. It should be noted that in the Wi-Fi system, the transmission interval of N NDPs is SIFS.
  • the access point B200 may send the foregoing uplink channel weight to the terminal T100 through HE Compressed Beamforming/CQI Report (High Efficiency Compressed Beamforming/Channel Quality Indication Report).
  • HE Compressed Beamforming/CQI report is configured as SU (single user, single user) mode.
  • the method shown in Figure 4 provides a method for measuring the uplink channel.
  • the measurement of the downlink channel will be described below with reference to FIG. 9.
  • the method includes:
  • the access point B200 sends the CQI periodic reporting configuration to the terminal T100.
  • the terminal T100 receives the CQI periodic reporting configuration from the access point B200.
  • a downlink physical layer protocol data unit (DL PPDU, downlink physical layer protocol data unit) can be used to indicate the CQI (channel quality indicator) periodic reporting configuration; wherein, the CQI period
  • the reporting configuration includes a reporting period T, which means that the terminal T100 is instructed to use T as the period to report the CQI.
  • the CQI periodic reporting configuration further includes the bandwidth and/or the number of columns related to the periodic reporting of the CQI, that is, the terminal T100 is instructed to report the CQI for the bandwidth and/or the number of columns. Exemplarily, as shown in FIG.
  • control subfield of the A-control subfield (A-control subfield) of the high-throughput control field (HT control field) of the data frame (data frame) included in the DL PPDU The above-mentioned CQI periodically reports the configuration.
  • the terminal T100 measures the downlink channel.
  • the terminal T100 measures the downlink channel to obtain the CQI.
  • the CQI corresponds to the bandwidth and/or the number of columns in the CQI periodic reporting configuration.
  • the terminal T100 may start timing after receiving the above-mentioned DL PPDU, and measure the downlink channel in the above-mentioned period. For example, the terminal T100 can start a timer after receiving the PPDU, and the timer duration is T. Before the timer expires, the terminal T100 continues, or at a certain interval, or when there is downlink data transmission, to the terminal T100 and The downlink channel between the access point B200 is measured. After the timer expires, the terminal T100 reports the CQI and restarts the timer, that is, starts the next cycle of measurement.
  • the access point B200 can send one or more DL PPUDs to the terminal T100 after 501, and the terminal T100 measures the one or more DL PPDUs. Measurement of the downlink channel.
  • the access point B200 sends a basic trigger frame to the terminal T100 according to the period T.
  • the basic trigger frame is used to indicate the uplink resource for reporting the CQI.
  • the terminal T100 receives the basic trigger frame from the access point B200 according to the period T.
  • the access point B200 sends the basic trigger frame to the terminal T100 according to the period T. It can also be expressed as that the access point B200 sends the basic trigger frame to the terminal T100 at the interval T, that is, the terminal T100 receives the basic trigger frame from the access point B200 at the interval T. Basic trigger frame.
  • the terminal T100 reports the CQI to the access point B200 according to the uplink resource.
  • the access point B200 receives the CQI from the terminal T100 according to the uplink resource.
  • the CQI can be used for downlink transmission, for example, based on the CQI to determine the MCS (modulation and coding scheme) for downlink transmission, etc.
  • the terminal T100 may send an uplink physical layer protocol data unit UL (uplink) PPDU to the access point B200.
  • the UL PPDU includes the HE Compressed Beamforming/CQI report, and the HE Compressed Beamforming/CQI report is used for Indicates the above CQI.
  • HE Compressed Beamforming/CQI report is configured as CQI mode.
  • the access point B200 sometimes fails to indicate the uplink resource for reporting the CQI to the terminal T100, and the terminal T100 may wait until the latest uplink resource is available after S503 to send the CQI.
  • the CQI and uplink data can be sent along the way.
  • HE Compressed Beamforming/CQI report is sent along with the MPDU (MAC Protocol Data Unit, aggregated media access control protocol data unit) including uplink data.
  • MPDU MAC Protocol Data Unit, aggregated media access control protocol data unit
  • channel-associated transmission refers to combining the MPDU including HE Compressed Beamforming/CQI report and the MPDU including uplink data into an A-MPDU (Aggregated MPDU) for transmission.
  • periodic channel detection is realized, and the downlink channel can be measured without using NDPA, which reduces the overhead.
  • the measurement is based on downlink data and downlink data pilots, which can provide a more accurate reference for channel quality, and can increase the capacity of downlink data transmission.
  • an embodiment of the present application also provides a communication device for implementing the method on the terminal T100 side in FIG. 4 and FIG. 9.
  • the communication device may be a terminal or a baseband chip.
  • the structure of the terminal can be shown in Figure 2.
  • the communication device includes a processor and a transceiver component.
  • the processor and the transceiver component can be used to implement the functions of each part of the above-mentioned terminal-side method.
  • its transceiver component can be a transceiver; if the communication device is a baseband chip, its transceiver component can be the input/output circuit of the baseband chip.
  • the communication device includes a processor.
  • the processor is used to run the above-mentioned program to realize the above-mentioned terminal-side method.
  • the communication device may further include a memory, and the memory is used to store a program for implementing the foregoing terminal-side method.
  • the embodiment of the present application also provides a communication device for implementing the method on the side of the access point B200 in FIG. 4 and FIG. 9.
  • the communication device may be an access point, or a baseband chip, or a baseband single board.
  • the communication device includes a processor and a transceiver component.
  • the processor and the transceiver component can be used to implement the functions of each part of the method on the access point side described above.
  • its transceiver component can be a transceiver
  • its transceiver component can be a baseband chip or baseband board's input/output circuit .
  • the communication device includes a processor.
  • the processor is used to run the above-mentioned program so that the above-mentioned method on the access point side is realized.
  • the communication device may further include a memory, and the memory is used to store a program for implementing the above-mentioned access point-side method.
  • the embodiments of the present application also provide a computer program product, the program product includes a program, and when the program is executed, the above-mentioned terminal-side or access-point-side method is executed.
  • the embodiment of the present application also provides a computer-readable storage medium on which a program is stored, and when it is run, the above-mentioned terminal-side or access-point-side method is executed.
  • the disclosed device and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.
  • the above-mentioned software function part may be stored in the storage unit.
  • the storage unit includes a number of instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute part of the steps of the methods described in the various embodiments of the present application.
  • the storage unit includes: one or more memories, such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), and electrically erasable programmable read-only memory (EEPROM), and many more.
  • the storage unit may exist independently or be integrated with the processor.
  • the size of the sequence number of each process does not mean the order of execution.
  • the order of execution of each process should be determined by its function and internal logic. There should be any limitation on the implementation process of the embodiments of the present application.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • programs can also be referred to as computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present invention are generated in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

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Abstract

本申请实施例提供一种Wi-Fi信道测量方法。在该方法中，接入点AP向终端STA发送触发帧trigger frame，向STA指示上行信道测量；AP从STA接收空数据包通知NDPA；其中，NDPA用于指示与上行信道测量相关的部分带宽信息partial BW Info、反馈类型和子载波分组feedback type and Ng、码本大小codebook size、和列数Nc；AP通过对来自STA的、与该NDPA对应的空数据包NDP的导频进行测量获取上行信道权值；其中，该上行信道权值用于上行MIMO；该AP向STA发送上述上行信道权值。通过上述方法，上行信道权值的测量可以由AP触发，即可在数据传输前驱动STA进行上行权值测量，利于STA在上行MIMO时提升上行MIMO的容量。

Description

Wi-Fi信道测量方法、装置和系统 技术领域
本申请涉及通信技术领域，尤其涉及Wi-Fi信道测量方法、装置和系统。
背景技术
WiFi 6是第6代Wi-Fi技术，吸纳了大量的5G关键技术，例如MIMO(multiple-input multiple-output，多入多出技术)，1024QAM(quadrature amplitude modulation，正交幅度调制)，OFDMA(orthogonal frequency division multiple access，正交频分多址接入)等。Wi-Fi 6相比Wi-Fi 5实现网络带宽提升4倍，并发用户数提升4倍，网络时延从平均30ms降低至20ms。
MIMO传输也称为空分复用。MIMO可以分为SU-MIMO(single-user MIMO，单用户MIMO)和MU-MIMO(multi-user MIMO，多用户MIMO)。SU-MIMO是指空分复用的数据流调度给一个单独的终端，以提升该终端的传输速率和频谱效率。在SU-MIMO中，分配给该终端的时频资源由该终端独占。MU-MIMO是指空分复用的数据流调度给多个终端，多个终端通过空分方式共享同一时频资源，网络可以通过空间维度的多个终端调度获得额外的多用户分集增益。MU-MIMO能显著提高网络的吞吐量和容量。
Wi-Fi 6支持站点回程场景。站点回传包括有线回传和无线回传。相较于有线回传，无线回传部署灵活，具有成本优势。对于站点回程场景，接入点AP和终端STA均可具备多天线能力，支持上行或者下行MIMO传输。为了支持MIMO传输需要对信道进行测量，确定上行权值或者下行权值。但目前Wi-Fi的信道测量机制无法完全满足MIMO传输的需求。
发明内容
本申请实施例用于提供Wi-Fi信道测量方法、装置以及系统，用于满足MIMO传输对于测量的需求。
为了实现以上目的，本申请实施例提供以下方案。
第一方面，本申请实施例提供一种Wi-Fi信道测量方法，包括：接入点AP向终端STA发送触发帧trigger frame，该trigger frame用于指示上行信道测量；该AP从该STA接收空数据包通知NDPA；其中，该NDPA用于指示与该上行信道测量相关的部分带宽信息partial BW Info、反馈类型和子载波分组feedback type and Ng、码本大小codebook size、和列数Nc；该AP通过对来自该STA的、与该NDPA对应的空数据包NDP的导频进行测量获取上行信道权值；其中，该上行信道权值用于上行MIMO；该AP向该STA发送该上行信道权值。
上述方法实现了AP触发上行权值测量的机制，打通了上行权值测量及反馈通道。AP在数据传输前，驱动STA进行上行权值测量，STA在进行上行MIMO发送时，加权的权值从开环权值转换为闭环权值，可提升上行MIMO容量。Wi-Fi系统目前无开环码本设计，相比采用单位阵的开环权值，在8单口发送时闭环权值可以提升上行传输容量30％～99％，满足了MIMO传输的需求。
作为一种可选的实施方式，该trigger frame的公共信息域common info field中的触发类型子域trigger type subfield的值为0，即该trigger frame为基本触发帧basic trigger frame；其中，该common info field中的比特B63用于指示该上行信道测量；或者，该basic trigger frame的用户信息域user info field中的比特B39用于指示该上行信道测量；或者，该基本触发帧Basic Trigger Frame的用户信息域user info field中的触发从属用户信息子域trigger dependent user info subfield中比特B5用于指示该上行信道测量。该实施方式复用了Wi-Fi的触发帧，改动较小，方案实现较为简单。
作为一种可选的实施方式，该trigger frame的common info field中的trigger type subfield的值为8-15中的一个值；该trigger frame的user info field中的触发从属用户信息子域trigger dependent user info subfield用于指示该上行信道测量。该实施方式复用了Wi-Fi的触发帧的触发类型，改动较小，降低了实现的复杂度。
作为一种可选的实施方式，该trigger frame的common info field中的trigger type subfield的值为8-15中的一个值；该trigger frame还用于指示该partial BW Info、该feedback type and Ng、该codebook size、和该Nc。该实施方式中，AP还向STA指示了测量和反馈参数，有利于对STA的测量和上报进行有利的安排，使测量更加高效。
作为一种可选的实施方式，该trigger frame的user info field中的触发从属用户信息trigger dependent user info包括该partial BW Info、该feedback type and Ng、该codebook size、和该Nc。该实施方式给出了如何携带测量参数的方案，复用触发帧的特定域，降低了实现复杂度。
作为一种可选的实施方式，该trigger frame还用于指示该NDP的数量N；该AP通过对来自该STA的、与该NDPA对应的空数据包NDP的导频进行测量获取上行信道权值，包括：该AP通过对N个该NDP的导频进行测量获取该上行信道权值。通过该实施方式，可以获得多个测量的综合值，使得测量结果更为客观、准确，受突发性干扰的影响小。
作为一种可选的实施方式，该AP通过对N个该NDP的导频进行测量获取该上行信道权值，包括：该AP通过对N个该NDP的导频进行测量获得N个测量结果；该AP根据该N个测量结果获得该上行信道权值。在该实施方式中，通过获取N个测量结果来获取上行信道权值，使得测量结果更为客观、准确，受突发性干扰的影响小。
作为一种可选的实施方式，该trigger frame的user info field中的trigger dependent user info包括该N。该实施方式给出了如何携带测量参数的方案，复用触发帧的特定域，降低了实现复杂度。
第二方面，本申请实施例提供一种Wi-Fi信道测量方法，包括：终端STA从接入点AP接收触发帧trigger frame，该trigger frame用于指示上行信道测量；该STA向该AP发送空数据包通知NDPA；其中，该NDPA用于指示与该上行信道测量相关的部 分带宽信息partial BW Info、反馈类型和子载波分组feedback type and Ng、码本大小codebook size、和列数Nc；该STA向该AP发送该NDPA对应的空数据包NDP，该NDP的导频用户该上行信道测量；该STA从该AP接收上行信道权值，该上行信道权值用于上行MIMO。
第二方面及其可选的实施方式、以及增益可参考第一方面及其实施方式的相关内容。以下可选的实施方式在第一方面中已有描述，以下从STA的角度进行描述，以便于更清楚的理解本申请实施例的方案。
作为一种可选的实施方式，该trigger frame还用于指示该NDP的数量N；
该STA向该AP发送该NDPA对应的空数据包NDP，包括：该STA向该AP发送N个该NDP。
作为一种可选的实施方式，该上行信道权值是基于该N个NDP的。
第三方面，本申请实施例提供一种Wi-Fi信道测量方法，包括：接入点AP向终端STA发送下行物理层协议数据单元DL PPDU，该DL PPDU用于指示CQI周期性上报的上报配置；其中，该上报配置包括上报周期；该AP根据该上报周期向该STA发送基本触发帧basic trigger frame,该basic trigger frame用于指示上报CQI的上行资源；该AP根据该上行资源从该STA接收该CQI。
在上述方法中，实现了周期性的CQI上报机制，在进行下行传输时，可参考STA周期性上报的CQI，能更准确的进行下行调度。另外该机制不需要AP发送NDPA和NDP，节省了开销，提升了容量。
作为一种可选的实施方式，该上报配置还包括与上述周期性CQI上报相关的带宽和/或列数。通过向STA指示带宽和列数，AP可以获得更符合其需求的CQI，能提升下行传输的性能。
作为一种可选的实施方式，该DL PPDU的数据帧data frame的HT control field中的A-control子域包括该上报配置。利用复用数据帧的特定域携带上报配置，降低了实现复杂度。
作为一种可选的实施方式，该AP根据该上行资源从该STA接收该CQI，包括：该AP根据该上行资源从该STA接收A-MPDU，该A-MPDU包括该CQI和上行数据。在该实施方式中，CQI可以与上行数据一起随路发送，节省了开销。
第四方面，本申请实施例提供一种Wi-Fi信道测量方法，包括：终端STA从接入点AP接收下行物理层协议数据单元DL PPDU，该DL PPDU用于指示CQI周期性上报配置；其中，该CQI周期性上报配置包括周期；该STA对下行信道进行测量以获得该CQI；该STA根据该周期从该AP接收基本触发帧basic trigger frame,该basic trigger frame用于指示上报该CQI的上行资源；该STA根据该上行资源向该AP上报该CQI。
第四方面及其可选的实施方式、以及增益可参考第三方面及其实施方式的相关内容。以下可选的实施方式在第三方面中已有描述，以下从STA的角度进行描述，以便于更清楚的理解本申请实施例的方案。
作为一种可选的实施方式，该上报配置还包括与该CQI周期性上报相关的带宽和/或列数；
该STA对下行信道进行测量以获得该CQI，包括：该STA对该下行信道进行测 量以获得该带宽和/或列数对应的CQI。
作为一种可选的实施方式，该STA根据该上行资源向该AP上报该CQI，包括：该STA根据该上行资源向该AP发送A-MPDU，该A-MPDU包括该CQI和上行数据。
第五方面，为实现上述各方面中接入点AP的功能，本申请实施例提供一种接入点，包括处理电路，该处理电路用于执行指令以实现上述各方面中接入点侧的方法。
第六方面，为实现上述各方面中终端STA的功能，本申请实施例提供一种终端，包括处理电路，该处理电路用于执行指令以实现上述各方面中终端侧的方法。
第七方面，本申请实施例还提供一种计算机程序产品，包括指令，当指令在接入点执行时，使得该接入点实现上述各方面中接入点侧的方法。
第八方面，本申请实施例还提供一种计算机可读存储介质，包括上述计算机程序产品。
第九方面，本申请实施例还提供一种Wi-Fi系统，包括第五方面的接入点和第六方面的终端。
上述第五至第九方面的说明和增益可参考第一方面及其实施方式的相关内容。
附图说明
图1是一种Wi-Fi系统的示意图；
图2是一种终端的结构示意图；
图3是一种接入点的结构示意图；
图4是一种Wi-Fi信道测量方法的流程示意图；
图5是触发帧的帧结构以及其内部部分域的结构、以及触发类型子域取值示意图；
图6是一种触发类型子域取值的示意图；
图7是一种测量和反馈信息的示意图；
图8是一种测量和反馈信息的示意图；
图9是另一种Wi-Fi信道测量方法的流程示意图；
图10是一种数据帧携带周期性CQI上报配置的示意图。
具体实施方式
为了更清楚、完整介绍本申请的技术方案，以下结合附图对本申请实施例进行说明。
本申请的技术方案适用于Wi-Fi系统。图1示出了一种Wi-Fi系统的架构图。如图1所示，该Wi-Fi系统包括终端T100，接入点(AP，access point)B200和网关(gateway)。终端T100和接入点B200之间可以通过Wi-Fi技术进行无线通信。接入点B200和网关相连，用于与外部网络进行交互。外部网络可以是运营商的核心网、私网、或者物联网。
本申请中，终端具有波束赋形的能力，能够发送一个或多个特定的波束方向上的信号，以及接收一个或多个特定的波束方向上的信号；接入点用于调度小区内的上行传输或者下行传输。网关用于与其他网络相连。在该Wi-Fi系统中，终端和接入点都具有多天线能力，支持MIMO，支持对于下行信道权值/上行信道权值的测量。
上述终端也称为站点(STA，Station)，是能够利用Wi-Fi技术进行无线通信功能的设备。本申请中的终端可以是指终端或者终端中的Wi-Fi芯片。其中，终端有多种形态，可以是支持Wi-Fi的蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备或可穿戴设备，虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。终端可以是移动的，也可以是固定的。
图2为终端的一种结构示意图。为了便于说明，图2仅示出了终端的主要部件。如图2所示，终端T100包括处理器、存储器、射频电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对终端进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。有些种类的终端不具有输入输出装置。
当终端开机后，处理器可以读取存储单元中的软件程序(指令)，解释并执行软件程序的指令，处理软件程序的数据。当需要发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
为了便于说明，图2仅示出了一个存储器和处理器。在实际的用户设备中，可以存在多个处理器和多个存储器。存储器也可以称为存储介质或者存储设备等，本申请实施例对此不做限制。
作为一种可选的实现方式，处理器可以包括基带处理器和/或中央处理器，基带处理器主要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端进行控制，执行软件程序，处理软件程序的数据。图2中的处理器集成了基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。可选的，终端可以包括多个基带处理器以适应不同的网络制式。可选的，终端可以包括多个中央处理器以增强其处理能力。可选的，可以将基带处理器和中央处理器的功能集成在一个处理器上实现。可选的，终端的各个部件可以通过各种总线连接。基带处理器也可以表述为基带处理电路或者基带处理芯片。中央处理器也可以表述为中央处理电路或者中央处理芯片。可选的，对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储单元中，由处理器执行软件程序以实现基带处理功能。
在本申请实施例中，可以将具有收发功能的天线和射频电路视为终端的收发单元， 将具有处理功能的处理器视为终端的处理单元。如图2所示，终端T100包括收发单元101和处理单元102。收发单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器，处理单板，处理模块、处理装置等。可选的，可以将收发单元101中用于实现接收功能的器件视为接收单元，将收发单元101中用于实现发送功能的器件视为发送单元，即收发单元101包括接收单元和发送单元。接收单元也可以称为接收机、接收器、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
上述接入点是一种部署在Wi-Fi无线接入网用以提供无线通信功能的设备。接入点B200的结构可以如图3所示。如图3所示，接入点B200包括201部分以及202部分。201部分主要用于射频信号的收发以及射频信号与基带信号的转换；202部分主要用于进行基带处理，对接入点进行控制等。201部分通常可以称为收发单元、收发机、收发电路、收发器等。202部分通常可以称为处理单元。通常202部分是接入点的控制中心。
作为一种可选的实施方式，201部分可以包括天线和射频单元，其中射频单元主要用于进行射频处理。可选的，可以将201部分中用于实现接收功能的器件视为接收单元，将用于实现发送功能的器件视为发送单元，即201部分包括接收单元和发送单元。示例性的，接收单元也可以称为接收机、接收器、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
作为一种可选的实施方式，202部分可以包括一个或多个单板，每个单板可以包括处理器和存储器，处理器用于读取和执行存储器中的程序以实现基带处理功能以及对接入点的控制。若存在多个单板，各个单板之间可以互联以增加处理能力。
作为另一种可选的实施方式，随着片上系统(英文：System-on-chip，简称：SoC)技术的发展，可以将202部分和201部分的全部或者部分功能由SoC技术实现，例如由一颗接入点功能芯片实现，该接入点功能芯片集成了处理器、存储器、天线接口等器件，接入点相关功能的程序存储在存储器中，由处理器执行程序以实现接入点的相关功能。可选的，该接入点功能芯片也能够读取该芯片外部的存储器以实现接入点的相关功能。
上述图2和图3关于终端、接入点的举例说明可以适用于本申请中的终端、接入点。
在本申请中，上行权值、上行信道权值、上行信道的权值有时会混用，但都表达相同的意思，即用于上行空间映射，例如作为上行预编码矩阵叠加在多流上。
在本申请中，下行权值、下行信道权值、下行信道的权值有时会混用，但都表达相同的意思，即用于下行空间映射，例如作为下行预编码矩阵叠加在多流上。
以下结合终端T100和接入点B200对本申请实施例的WiFi信道测量方法进行说明。如图4所示，该方法包括：
S401：接入点B200向终端T100发送触发帧，该触发帧用于指示上行信道测量。
其中，触发帧trigger frame是Wi-Fi定义的一种数据格式。
S402：终端T100向接入点B200发送空数据包通知。
换而言之，接入点B200从终端T100接收空数据包通知。
其中，空数据包通知NDPA用于指示与上行信道测量相关的参数，例如：部分带 宽信息partial BW Info、反馈类型和子载波分组feedback type and Ng、码本大小codebook size、和列数Nc。其中，partial BW Info用于指示需要反馈的带宽范围，feedback type and Ng和Codebook size共同用于指示反馈类型，子载波分组和码本格式，Nc用于指示压缩波束赋形反馈矩阵的列数并被设置为Nc-1，其物理意义上是终端测量的空时流的数量。
终端T100收到上述触发帧后，可以确定上行信道测量相关的部分带宽信息partial BW Info、反馈类型和子载波分组feedback type and Ng、码本大小codebook size、和列数Nc，并通过空数据包通知来通知接入点B200。
S403：终端T100向接入点B200发送空数据包。
其中，该空数据包NDP与上述NDPA相对应。作为一种示例，NDP在NDPA之后间隔SIFS(short interframe space,短帧间间隔)发送。
S404：接入点B200对该NDP的导频进行测量以获得上行信道权值；
其中，上行信道权值用于上行MIMO。示例性的，在上行传输中，接入点B200通过Trigger Frame调度终端T100进行上行发送，上行发送可以是多流的发送，终端T100在发送时，将接入点B200反馈的上行信道权值，作为发送的预编码矩阵叠加在待发送的多流上做Spatial mapping(空间映射)进行发送。
S405：接入点B200向终端T100发送所述上行信道权值。
换而言之，终端T100从接入点B200接收上行信道权值。
通过上述方法，实现了接入点B200触发的上行信道权值测量机制，打通了上行信道权值测量及反馈通道。接入点B200在数据传输前，驱动终端T100进行上行权值测量，终端T100在进行上行MIMO发送时，加权的权值从开环权值转换为闭环权值，提升了上行MIMO容量；WIFI系统目前无开环码本设计，相比采用单位阵的开环权值，在8端口发送时闭环权值可以提升上行传输容量30％～99％。
作为第一种可选的实施方式，如图5所示，该trigger frame的公共信息域common info field中的触发类型子域trigger type subfield的值为0，即该trigger frame为基本触发帧basic trigger frame；其中，该basic trigger frame的common info field中的比特B63用于指示该上行信道测量；或者，该basic trigger frame的用户信息域user info field中的比特B39用于指示该上行信道测量；或者，该basic trigger frame的user info field的中的触发从属用户信息子域trigger dependent user info subfield中的比特B5用于指示该上行信道测量。该实施方式复用了Wi-Fi的触发帧，改动较小，方案实现较为简单。
作为第二种可选的实施方式，如图5和图6所示，该trigger frame的common info field中的trigger type subfield的值为8-15中的一个值(图6以取值为8作为示例)；该trigger frame的user info field中的触发从属用户信息子域trigger dependent user info subfield用于指示该上行信道测量。该实施方式复用了Wi-Fi的触发帧的触发类型，改动较小，降低了实现的复杂度。
作为第三种可选的实施方式，如图5、图6、和图7所示，该trigger frame的common info field中的trigger type subfield的值为8-15中的一个值(图6以取值为8作为示例)；该trigger frame还用于指示测量相关的参数，例如：partial BW Info、feedback type and Ng、codebook size、和该Nc。该实施方式中，AP还向STA指示了测量和反馈参数， 有利于对STA的测量和上报进行有利的安排，使测量更加高效。
作为第四种可选的实施方式，如图5、图6、和图7所示，该trigger frame的user info field中的触发从属用户信息trigger dependent user info包括该partial BW Info、该feedback type and Ng、该codebook size、和该Nc。该实施方式给出了如何携带测量参数的方案，复用触发帧的特定域，降低了实现复杂度。
作为第五种可选的实施方式，在S401中，该trigger frame还用于指示该NDP的数量N。相应的，在S403，终端T100向接入点B200发送空数据包包括：终端T100向接入点B200发送N个空数据包。在S404，接入点B200对该NDP的导频进行测量以获得上行信道权值，包括：接入点B200对该N个NDP的导频进行测量以获得上行信道权值。通过该实施方式，可以获得多个测量的综合值，使得测量结果更为客观、准确，受突发性干扰的影响小。
在第五种可选的实施方式基础上，接入点B200对该N个NDP的导频进行测量以获得上行信道权值的一种可选的实施方式可以包括：接入点B200通过对N个NDP的导频进行测量获得N个测量结果；接入点B200根据上述N个测量结果获得上行信道权值。在该实施方式中，通过获取N个测量结果来获取上行信道权值，使得测量结果更为客观、准确，受突发性干扰的影响小。
可选的，如图5、图6和图8所示，trigger frame的user info field中的trigger dependent user info可以包括上述N。需要说明的是，在Wi-Fi系统中，N个NDP的发送间隔是SIFS。
作为S405的一种可选的实施方式，接入点B200可以通过HE Compressed Beamforming/CQI Report(高效压缩波束成型/信道质量指示报告)向终端T100发送上述上行信道权值。其中，HE Compressed Beamforming/CQI report被配置为SU(单用户，single user)模式。
图4所示的方法提供了对上行信道测量的方法。以下结合图9对下行信道的测量进行说明。如图9所示，该方法包括：
S501：接入点B200向终端T100发送CQI周期性上报配置。
换而言之，终端T100从接入点B200接收CQI周期性上报配置。
作为一种可选的实施方式，可以通过下行物理层协议数据单元(DL PPDU，downlink physical layer protocol data unit)来指示CQI(信道质量指示，channel quality indicator)周期性上报配置；其中，该CQI周期性上报配置中包括上报周期T，即指示终端T100以T为周期进行CQI上报。可选的，该CQI周期性上报配置还包括与CQI周期性上报相关的带宽和/或列数，即指示终端T100针对该带宽和/或列数上报CQI。示例性的，如图10所示，可以在DL PPDU包括的数据帧(data frame)的高通量控制域(HT control field)的A控制子域(A-control subfield)中的控制子域携带上述CQI周期性上报配置。
S502：终端T100对下行信道进行测量。
终端T100对下行信道进行测量以获得CQI。可选的，该CQI与CQI周期性上报配置中的带宽和/或列数相对应。
作为一种可能的实施方式，终端T100可以以收到上述DL PPDU起开始计时，并 在上述周期内对下行信道进行测量。例如，终端T100可以在收到PPDU之后，开启定时器，定时器时长为T，在定时器未超时前，终端T100持续的、或者按照一定间隔、或者当有下行数据传输时，对终端T100与接入点B200之间的下行信道进行测量。定时器超时后，终端T100进行CQI上报，并重启定时器，即开启下一个周期的测量。
其中，作为对下行信道进行测量的一种可能的实施方式，接入点B200在501之后可以向终端T100发送一个或多个DL PPUD，终端T100通过对该一个或多个DL PPDU进行测量以实现对下行信道的测量。
S503：接入点B200根据周期T向终端T100发送基本触发帧。其中，该基本触发帧用于指示上报CQI的上行资源。
换而言之，终端T100根据周期T从接入点B200接收该基本触发帧。
接入点B200根据周期T向终端T100发送基本触发帧也可以表述为接入点B200以周期T为间隔向终端T100发送基本触发帧，即终端T100以周期T为间隔从接入点B200接收该基本触发帧。
S504：终端T100根据上行资源向接入点B200上报CQI。
换而言之，接入点B200根据该上行资源上从终端T100接收CQI。
其中，该CQI可用于下行传输，例如基于CQI判断下行发送的MCS(modulation and coding scheme，调制和编码方案)等。
作为一种可选的实施方式，终端T100可以向接入点B200发送上行物理层协议数据单元UL(uplink)PPDU，该UL PPDU包括HE Compressed Beamforming/CQI report，该HE Compressed Beamforming/CQI report用于指示上述CQI。其中，HE Compressed Beamforming/CQI report被配置为CQI模式。
作为一种可能的情况，在503中，接入点B200有时未能向终端T100指示上报CQI的上行资源，终端T100可以等待到S503之后最近一次有上行资源时发送上述CQI。
作为一种可选的实施方式，终端T100有上行数据时，CQI和上行数据可以随路发送。例如，HE Compressed Beamforming/CQI report与包括上行数据的MPDU(MAC Protocol Data Unit，聚合媒体接入控制协议数据单元)随路发送。其中，随路发送是指将包括HE Compressed Beamforming/CQI report的MPDU和包括上行数据的MPDU组合为A-MPDU(Aggregated MPDU)进行发送。
通过图9所示的方法，实现了周期性的信道检测，可以不用使用NDPA的方式测量下行信道，减少了开销。另外，该测量基于下行数据的和下行数据的导频，能更准确的提供信道质量的参考，能够提升下行数据发送的容量。
上述图5至图8以及图10中的数据格式和取值，为了技术方案描述的需要，仅示出了部分域/子域、或者取值，其余空白的域在Wi-Fi标准802.11ax中有相关说明，此处不做赘述。
为了实现本申请的技术方案，本申请实施例还提供一种通信装置，用于实现图4和图9中终端T100侧的方法。该通信装置可以是终端或者基带芯片。该终端的结构可以如图2所示。
作为一种可选的设计，该通信装置包括处理器和收发组件。该处理器和收发组件可用于实现上述终端侧的方法中各个部分的功能。在该设计中，如果该通信装置是终 端，其收发组件可以是收发机，如果该通信装置是基带芯片，其收发组件可以是基带芯片的输入/输出电路。
作为另一种可选的设计，该通信装置包括处理器。处理器用于运行上述程序以使上述终端侧的方法被实现。可选的，该通信装置还可以包括存储器，该存储器用于存储实现上述终端侧方法的程序。
本申请实施例还提供一种通信装置，用于实现图4和图9中接入点B200侧的方法。该通信装置可以是接入点，或者基带芯片，或者基带单板。
作为一种可选的设计，该通信装置包括处理器和收发组件。该处理器和收发组件可用于实现上述接入点侧的方法中各个部分的功能。在该设计中，如果该通信装置是接入点，其收发组件可以是收发机，如果该通信装置是基带芯片或基带单板，其收发组件可以是基带芯片或基带单板的输入/输出电路。
作为另一种可选的设计，该通信装置包括处理器。处理器用于运行上述程序以使得上述接入点侧的方法被实现。可选的，该通信装置还可以包括存储器，该存储器用于存储实现上述接入点侧方法的程序。
本申请实施例还提供一种计算机程序产品，该程序产品包括程序，当该程序被运行时，使得上述终端侧或者接入点侧方法被执行。
本申请实施例还提供一种计算机可读存储介质，其上存储有程序，当其被运行时，使得上述终端侧或者接入点侧方法被执行。
本领域技术人员应知，上述不同的可选部分/实现方式等可以根据不同的网络需要进行组合和替换。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
上述软件功能部分可以存储在存储单元中。所述存储单元包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本申请各个实施例所述方法的部分步骤。所述存储单元包括：一个或多个存储器，如只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)，电可擦写可编程只读存储器(EEPROM)，等等。所述存储单元可以独立存在，也可以和处理器集成在一起。
本领域技术人员可以清楚地了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。上述描述的装置的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
本领域普通技术人员可以理解：本文中涉及的第一、第二等各种数字编号仅为描述方便进行的区分，并不用来限制本申请实施例的范围。
本领域普通技术人员可以理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在本申请中，程序也可以被称为计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (32)

  1. 一种Wi-Fi信道测量方法，其特征在于，包括：
    接入点AP向终端STA发送触发帧trigger frame，所述trigger frame用于指示上行信道测量；
    所述AP从所述STA接收空数据包通知NDPA；其中，所述NDPA用于指示与所述上行信道测量相关的部分带宽信息partial BW Info、反馈类型和子载波分组feedback type and Ng、码本大小codebook size、和列数Nc；
    所述AP通过对来自所述STA的、与所述NDPA对应的空数据包NDP的导频进行测量获取上行信道权值；其中，所述上行信道权值用于上行MIMO；
    所述AP向所述STA发送所述上行信道权值。
  2. 根据权利要求1所述的方法，其中，所述trigger frame为基本触发帧basic trigger frame；其中，
    所述basic trigger frame的common info field中的比特B63用于指示所述上行信道测量；或者，
    所述basic trigger frame的用户信息域user info field中的比特B39用于指示所述上行信道测量；或者，
    所述basic trigger frame的所述user info field的中的触发从属用户信息子域trigger dependent user info subfield中的比特B5用于指示所述上行信道测量。
  3. 根据权利要求1所述的方法，其中，所述trigger frame的common info field中的trigger type subfield的值为8-15中的一个值；
    所述trigger frame的user info field中的触发从属用户信息子域trigger dependent user info subfield用于指示所述上行信道测量。
  4. 根据权利要求1所述的方法，其中，所述trigger frame的common info field中的trigger type subfield的值为8-15中的一个值；
    所述trigger frame还用于指示所述partial BW Info、所述feedback type and Ng、所述codebook size、和所述Nc。
  5. 根据权利要求4所述的方法，其中，所述trigger frame的user info field中的触发从属用户信息trigger dependent user info包括所述partial BW Info、所述feedback type and Ng、所述codebook size、和所述Nc。
  6. 根据权利要求4或5所述的方法，其中，所述trigger frame还用于指示所述NDP的数量N；
    所述AP通过对来自所述STA的、与所述NDPA对应的空数据包NDP的导频进行测量获取上行信道权值，包括：
    所述AP通过对N个所述NDP的导频进行测量获取所述上行信道权值。
  7. 根据权利要求6所述的方法，其中，所述AP通过对N个所述NDP的导频进行测量获取所述上行信道权值，包括：
    所述AP通过对N个所述NDP的导频进行测量获得N个测量结果；
    所述AP根据所述N个测量结果获得所述上行信道权值。
  8. 根据权利要求6或7所述的方法，其中，所述trigger frame的user info field中的trigger dependent user info包括所述N。
  9. 一种Wi-Fi信道测量方法，其特征在于，包括：
    终端STA从接入点AP接收触发帧trigger frame，所述trigger frame用于指示上行信道测量；
    所述STA向所述AP发送空数据包通知NDPA；其中，所述NDPA用于指示与所述上行信道测量相关的部分带宽信息partial BW Info、反馈类型和子载波分组feedback type and Ng、码本大小codebook size、和列数Nc；
    所述STA向所述AP发送所述NDPA对应的空数据包NDP，所述NDP的导频用户所述上行信道测量；
    所述STA从所述AP接收上行信道权值，所述上行信道权值用于上行MIMO。
  10. 根据权利要求9所述的方法，其中，所述trigger frame为基本触发帧basic trigger frame；其中，
    所述basic trigger frame的common info field中的比特B63用于指示所述上行信道测量；或者，
    所述basic trigger frame的用户信息域user info field中的比特B39用于指示所述上行信道测量；或者，
    所述basic trigger frame的所述user info field的中的触发从属用户信息子域trigger dependent user info subfield中的比特B5用于指示所述上行信道测量。
  11. 根据权利要求9所述的方法，其中，所述trigger frame的common info field中的trigger type subfield的值为8-15中的一个值；
    所述trigger frame的user info field中的触发从属用户信息子域trigger dependent user info subfield用于指示所述上行信道测量。
  12. 根据权利要求9所述的方法，其中，所述trigger frame的common info field中的trigger type subfield的值为8-15中的一个值；
    所述trigger frame还用于指示所述partial BW Info、所述feedback type and Ng、所述codebook size、和所述Nc。
  13. 根据权利要求12所述的方法，其中，所述trigger frame的user info field中的 触发从属用户信息trigger dependent user info包括所述partial BW Info、所述feedback type and Ng、所述codebook size、和所述Nc。
  14. 根据权利要求12或13所述的方法，其中，所述trigger frame还用于指示所述NDP的数量N；
    所述STA向所述AP发送所述NDPA对应的空数据包NDP，包括：
    所述STA向所述AP发送N个所述NDP。
  15. 根据权利要求14所述的方法，其中，所述上行信道权值是基于所述N个NDP的。
  16. 根据权利要求14或15所述的方法，其中，所述trigger frame的user info field中的trigger dependent user info包括所述N。
  17. 一种Wi-Fi信道测量方法，其特征在于，包括：
    接入点AP向终端STA发送下行物理层协议数据单元DL PPDU，所述DL PPDU用于指示CQI周期性上报配置；其中，所述CQI周期性上报配置包括上报周期；
    所述AP根据所述上报周期向所述STA发送基本触发帧basic trigger frame,所述basic trigger frame用于指示上报CQI的上行资源；
    所述AP根据所述上行资源从所述STA接收所述CQI。
  18. 根据权利要求17所述的方法，其中，所述CQI周期性上报配置还包括与CQI周期性上报相关的带宽和/或列数；
    其中，从所述STA接收的所述CQI与所述带宽和/或列数对应。
  19. 根据权利要求17或18所述的方法，其中，所述DL PPDU的数据帧data frame的HT control field中的A-control子域包括所述CQI周期性上报配置。
  20. 根据权利要求17-19任一所述的方法，其中，所述AP根据所述上行资源从所述STA接收所述CQI，包括：
    所述AP根据所述上行资源从所述STA接收聚合介质接入控制协议数据单元A-MPDU，所述A-MPDU包括所述CQI和上行数据。
  21. 一种Wi-Fi信道测量方法，其特征在于，包括：
    终端STA从接入点AP接收下行物理层协议数据单元DL PPDU，所述DL PPDU用于指示CQI周期性上报配置；其中，所述CQI周期性上报配置包括上报周期；
    所述STA对下行信道进行测量以获得CQI；
    所述STA根据所述周期从所述AP接收基本触发帧basic trigger frame,所述basic trigger frame用于指示上报所述CQI的上行资源；
    所述STA根据所述上行资源向所述AP上报所述CQI。
  22. 根据权利要求21所述的方法，其中，所述CQI周期性上报配置还包括与CQI周期性上报相关的带宽和/或列数；
    所述STA对下行信道进行测量以获得所述CQI，包括：
    所述STA对所述下行信道进行测量以获得与所述带宽和/或列数对应的CQI。
  23. 根据权利要求21或22所述的方法，其中，所述DL PPDU的数据帧data frame的HT control field中的A-control子域包括所述CQI周期性上报配置。
  24. 根据权利要求21-23任一所述的方法，其中，所述STA根据所述上行资源向所述AP上报所述CQI，包括：
    所述STA根据所述上行资源向所述AP发送A-MPDU，所述A-MPDU包括所述CQI和上行数据。
  25. 一种接入点，其特征在于，包括处理电路，所述处理电路用于执行指令以实现如权利要求1-8任一所述的方法。
  26. 一终端，其特征在于，包括处理电路，所述处理电路用于执行指令以实现如权利要求9-16任一所述的方法。
  27. 一种接入点，其特征在于，包括处理电路，所述处理电路用于执行指令以实现如权利要求17-20任一所述的方法。
  28. 一终端，其特征在于，包括处理电路，所述处理电路用于执行指令以实现如权利要求21-24任一所述的方法。
  29. 一种计算机程序产品，其特征在于，包括指令，当指令在接入点执行时，使得所述接入点实现如权利要求1-8或者17-20任一所述的方法。
  30. 一种计算机可读存储介质，其特征在于，包括如权利要求29所述的计算机程序产品。
  31. 一种计算机程序产品，其特征在于，包括指令，当指令在本地终端执行时，使得所述本地终端实现如权利要求9-16或者21-24任一所述的方法。
  32. 一种计算机可读存储介质，其特征在于，包括如权利要求31所述的计算机程序产品。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023024771A1 (en) * 2021-08-25 2023-03-02 Intel Corporation NON-TRIGGER BASED (TB) SENSING MEASUREMENT FLOW FOR 11bf IN THE SUB-7 GHZ

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105519025A (zh) * 2014-12-22 2016-04-20 华为技术有限公司 一种cqi上报方法、触发方法、设备及无线通信系统
CN106454930A (zh) * 2015-08-07 2017-02-22 中兴通讯股份有限公司 信道探测报告传输方法及装置
CN107027145A (zh) * 2016-02-01 2017-08-08 华为技术有限公司 信道测量方法及装置
US20170251449A1 (en) * 2016-02-28 2017-08-31 Qualcomm Incorporated Unicast and broadcast protocol for wireless local area network ranging and direction finding
CN107534472A (zh) * 2015-04-16 2018-01-02 Lg 电子株式会社 在无线通信系统中的信道探测方法及其装置
US20180331749A1 (en) * 2015-11-03 2018-11-15 Intel IP Corporation Uplink and downlink sounding for wireless networks
US20190075538A1 (en) * 2017-11-09 2019-03-07 Intel IP Corporation Enhanced collaborating timing measurements for wireless communications
US20190342885A1 (en) * 2015-08-19 2019-11-07 Lg Electronics Inc. Method for feeding back channel state in wireless communication system and device therefor
US20200092850A1 (en) * 2017-04-05 2020-03-19 Intel IP Corporation Apparatus, system and method of trigger-based ranging measurement

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10143003B2 (en) * 2015-10-15 2018-11-27 Samsung Electronics Co., Ltd. Methods and apparatus for beamforming feedback in wireless systems

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105519025A (zh) * 2014-12-22 2016-04-20 华为技术有限公司 一种cqi上报方法、触发方法、设备及无线通信系统
CN107534472A (zh) * 2015-04-16 2018-01-02 Lg 电子株式会社 在无线通信系统中的信道探测方法及其装置
CN106454930A (zh) * 2015-08-07 2017-02-22 中兴通讯股份有限公司 信道探测报告传输方法及装置
US20190342885A1 (en) * 2015-08-19 2019-11-07 Lg Electronics Inc. Method for feeding back channel state in wireless communication system and device therefor
US20180331749A1 (en) * 2015-11-03 2018-11-15 Intel IP Corporation Uplink and downlink sounding for wireless networks
CN107027145A (zh) * 2016-02-01 2017-08-08 华为技术有限公司 信道测量方法及装置
US20170251449A1 (en) * 2016-02-28 2017-08-31 Qualcomm Incorporated Unicast and broadcast protocol for wireless local area network ranging and direction finding
US20200092850A1 (en) * 2017-04-05 2020-03-19 Intel IP Corporation Apparatus, system and method of trigger-based ranging measurement
US20190075538A1 (en) * 2017-11-09 2019-03-07 Intel IP Corporation Enhanced collaborating timing measurements for wireless communications

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
INTEL CORPORATION: "Channel access mechanism for NR-unlicensed", 3GPP DRAFT; R1-1912197, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Reno, USA; 20191118 - 20191122, 9 November 2019 (2019-11-09), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051823274 *
ROBERT STACEY, AZIZI SHAHRNAZ, HUANG PO-KAI, LI QINGHUA, CHEN XIAOGANG, GHOSH CHITTO, CARIOU LAURENT, ALPERT YARON, GUREVITZ ASSAF: "IEEE 802.11-16/0024r0: IEEE P802.11 Wireless LANs, Proposed TGax draft specification", 15 January 2016 (2016-01-15), pages 1 - 147, XP055338464, Retrieved from the Internet <URL:https://mentor.ieee.org/802.11/dcn/16/11-16-1211-02-00ax-cr-cid-122-576-972-2598.docx> [retrieved on 20170124] *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023024771A1 (en) * 2021-08-25 2023-03-02 Intel Corporation NON-TRIGGER BASED (TB) SENSING MEASUREMENT FLOW FOR 11bf IN THE SUB-7 GHZ

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