WO2021233233A1 - 空数据分组声明帧的传输方法及相关装置 - Google Patents

空数据分组声明帧的传输方法及相关装置 Download PDF

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Publication number
WO2021233233A1
WO2021233233A1 PCT/CN2021/093950 CN2021093950W WO2021233233A1 WO 2021233233 A1 WO2021233233 A1 WO 2021233233A1 CN 2021093950 W CN2021093950 W CN 2021093950W WO 2021233233 A1 WO2021233233 A1 WO 2021233233A1
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WIPO (PCT)
Prior art keywords
ndpa frame
subfield
information
frame
bandwidth
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PCT/CN2021/093950
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English (en)
French (fr)
Inventor
于健
郭宇宸
刘辰辰
李云波
淦明
梁丹丹
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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 JP2022571362A priority Critical patent/JP7457162B2/ja
Priority to EP21807657.8A priority patent/EP4149012A4/en
Priority to KR1020227045085A priority patent/KR20230014750A/ko
Priority to AU2021277365A priority patent/AU2021277365A1/en
Priority to BR112022023636A priority patent/BR112022023636A2/pt
Publication of WO2021233233A1 publication Critical patent/WO2021233233A1/zh
Priority to US17/992,705 priority patent/US20230086669A1/en
Priority to US18/365,841 priority patent/US11943170B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0457—Variable allocation of band or rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0634—Antenna weights or vector/matrix coefficients
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • This application relates to the technical field of wireless local area networks, and in particular to a transmission method and related devices of a null data packet declaration frame.
  • AP access points
  • STA stations
  • BF beamforming
  • BF beamforming
  • BS beamforming
  • CSI channel state information
  • NDPA frames are called high-efficiency (HE) NDPA frames.
  • the HE NDPA frame includes the site information field.
  • the site information field includes the site association identifier (AID) subfield, partial bandwidth information (Partial bandwidth information, Partial BW Info) subfield, feedback type (feedback type), and number of packets (Number). of grouping) subfield and number of columns (Nc) subfield.
  • AID site association identifier
  • Partial bandwidth information Partial bandwidth information
  • Partial BW Info Partial BW Info
  • feedback type feedback type
  • Nc number of packets subfield
  • Part of the bandwidth information subfield is used to indicate the frequency domain range of the channel state information that the STA needs to feed back.
  • Part of the bandwidth information subfield includes the start index (start index) of the resource unit (RU) to the end index (end index) of the resource unit, indicating a continuous segment of RU, so as to indicate the frequency corresponding to the continuous segment of RU.
  • the maximum allowed transmission bandwidth is 160MHz.
  • the 160MHz bandwidth corresponds to 74 resource units (26-tone RU) of 26 subcarriers at most.
  • the RU start index and RU end index respectively indicate one of 74 26-tone RUs.
  • Wi-Fi Wireless Fidelity
  • 802.11be or Wi-Fi 7 needs to support larger bandwidth transmission, such as support for transmission with a bandwidth greater than 160 MHz.
  • channel detection is required. How to measure channels with larger bandwidths (for example, with a bandwidth greater than 160MHz) to obtain channel state information to support data transmission with larger bandwidths, and to improve the transmission rate of the next-generation Wi-Fi standard is crucial.
  • the embodiment of the present application provides a transmission method and related device of an NDPA frame, which can meet the requirement of indicating an RU in a bandwidth greater than 160 MHz that needs to feed back channel state information.
  • an embodiment of the present application provides a method for transmitting an NDPA frame, including:
  • the access point generates an NDPA frame
  • the NDPA frame includes a site information field
  • the site information field includes an AID subfield indicating an associated identifier AID of a site
  • the site information field also includes a partial bandwidth information subfield and/or Column number subfield
  • the partial bandwidth information subfield indicates the resource unit (RU) of the channel state information that the station needs to feed back in the bandwidth corresponding to the NDPA frame
  • the column number subfield indicates compressed beamforming feedback
  • the number of columns of the matrix; the bandwidth corresponding to the NDPA frame is greater than 160 MHz, and the number of columns indicated by the column number subfield is greater than 8;
  • the access point sends the NDPA frame.
  • the implementation manners of the present application provide a transmission method of an NDPA frame, including:
  • a station receives an NDPA frame, the NDPA frame includes a station information field, the station information field includes an AID subfield indicating an associated identifier AID of a station; the station information field also includes a partial bandwidth information subfield or a column number subfield;
  • the partial bandwidth information subfield indicates the RU that the station needs to feed back channel state information in the bandwidth corresponding to the NDPA frame; the bandwidth corresponding to the NDPA frame is greater than 160 MHz, and the number of columns indicated by the column number subfield is greater than 8. ;
  • the station obtains the RU that needs to feed back channel state information from the NDPA frame.
  • the embodiments of the present application also provide a transmission device, including a processing unit and a sending unit;
  • the processing unit is configured to generate an NDPA frame, the NDPA frame includes a site information field, the site information field includes an AID subfield indicating an associated identifier AID of a site; the site information field also includes a partial bandwidth information subfield and/ Or the number of columns subfield; the partial bandwidth information subfield indicates the resource unit (RU) required by the station to feed back channel state information in the bandwidth corresponding to the NDPA frame, and the number of columns subfield indicates compressed beamforming
  • the number of columns of the feedback matrix the bandwidth corresponding to the NDPA frame is greater than 160 MHz, and the number of columns indicated by the column number subfield is greater than 8;
  • the sending unit is used to send the NDPA frame.
  • the embodiments of the present application also provide a transmission device, including a processing unit and a receiving unit;
  • the receiving unit is configured to receive an NDPA frame, the NDPA frame includes a site information field, the site information field includes an AID subfield indicating an associated identifier AID of a site; the site information field also includes a partial bandwidth information subfield and/ Or column number subfield; the partial bandwidth information subfield indicates the RU that the station needs to feed back channel state information in the bandwidth corresponding to the NDPA frame; the bandwidth corresponding to the NDPA frame is greater than 160 MHz, the column number subfield indicates The number of columns is greater than 8;
  • the processing unit is used to obtain an RU that needs to feedback channel state information from the NDPA frame.
  • the partial bandwidth information subfield of the NDPA frame indicates RUs that need to feed back channel state information in a bandwidth greater than 160 MHz.
  • the station information field can instruct the station to perform channel detection with a bandwidth greater than 160MHz, and feed back beamforming reports according to the channel detection results, so that a larger bandwidth can be used to transmit data and improve transmission efficiency.
  • the number of columns indicated by the column number subfield is greater than 8.
  • the station information field can instruct the station to perform channel detection with a bandwidth greater than 8 columns, and feed back beamforming reports according to the channel detection results, so that more streams can be used to transmit data and improve transmission efficiency.
  • And/or channel detection with a number of streams greater than 8 and the beamforming report is fed back according to the channel detection result.
  • the NDPA frame includes type information, and the type information indicates that the NDPA frame is a very high throughput EHT NDPA frame.
  • Such type information can indicate NDPA frame variants of 802.11be or other standards after 802.11be.
  • a variant of the NDPA frame may be an extremely high throughput (EHT) NDPA frame of the 802.11be standard.
  • the EHT NDPA frame can indicate the RU in the bandwidth larger than 160MHz that needs to feed back channel state information, to instruct the station to perform channel detection of the bandwidth larger than 160MHz, and feedback the beamforming report according to the channel detection result, so as to realize the use of larger bandwidth transmission Data, improve transmission efficiency.
  • the EHT NDPA frame can also indicate the number of columns greater than 8, to instruct the station to perform channel detection with a bandwidth greater than 8, and feed back beamforming reports according to the channel detection results, so that more streams can be used to transmit data and improve transmission efficient.
  • the NDPA frame provided in the embodiment of the present application is also applicable to the case where the bandwidth is less than or equal to 160 MHz, or the indicated number of columns is less than or equal to 8.
  • the NDPA frame further includes a probe dialogue token field and a special site information field, the probe dialogue token field includes a frame category subfield, and the special site information field includes a frame subcategory subfield,
  • the type information is carried in the frame category subfield and the frame subcategory subfield;
  • the frame category subfield indicates that the NDPA frame is a high throughput (HE) NDPA frame and a non-ranging ( Ranging) NDPA frame,
  • the frame subtype subfield indicates that the NDPA frame is an EHT NDPA frame.
  • the HE STA or Ranging STA that does not support the EHT NDPA frame will recognize the EHT NDPA frame as a VHT NDPA frame according to the frame type subfield in the probe dialog token field, and read the NDPA frame according to the format of the VHT NDPA frame.
  • the site information field of the EHT NDPA frame does not include the AID of the HE STA or Ranging STA.
  • the HE STA or Ranging STA that receives the EHT NDPA frame will recognize that the AID in the site information field does not match its own AID, and will not give feedback based on the NDPA frame. This can prevent HE STA or Ranging STA from misreading the EHT NDPA frame.
  • the EHT STA that supports EHT NDPA frame can determine whether it is an EHT NDPA frame according to the frame subtype subfield, and when the frame subtype subfield indicates an EHT NDPA frame, read the NDPA according to the structure of the EHT NDPA frame Part of the bandwidth information subfield and the number of columns subfield in the frame can accurately obtain the part of the bandwidth information needed to feed back the channel state information and/or the number of columns that need to be fed back.
  • the HE STA in this application refers to the HE STA that does not support the NDPA frame variant after the HE NDPA frame.
  • the Ranging STA in the embodiment of the present application is an old version of the Ranging STA that does not support the NDPA frame variant after the Ranging NDPA frame.
  • the partial bandwidth information subfield includes: a resource unit start index and a resource unit offset index, and the resource unit start index is used to indicate the first channel state information that the station needs to feed back.
  • the resource unit offset index indicates the offset of the last RU for which channel state information needs to be fed back by the station relative to the first RU.
  • the station can determine the last RU that needs to feed back channel state information according to the offset indicated by the partial bandwidth information subfield and the first RU.
  • This can compress the number of bits of the resource unit offset index, thereby compressing the number of bits required for part of the bandwidth information subfield when the same partial bandwidth information is indicated, so that the number of bits for the partial bandwidth information subfield is not increased.
  • the number of bits of the resource unit start index is 8 bits, and the number of bits of the resource unit offset index is less than or equal to 5 bits.
  • the solution of the present application can reduce the number of bits in some bandwidth information subfields, so that the saved bits can be added to the column number subfield, increasing the number of columns.
  • the resource unit offset index indicates the offset of the last RU relative to the first RU by indicating the multiple of the offset relative to the basic granularity.
  • the resource unit offset index may indicate the offset by indicating N. N is a positive integer. This can more effectively compress the resource unit offset index, thereby helping to support indicating RUs in a larger bandwidth that need to feed back channel state information, and also helping to cause the column number subfield to indicate a larger number of columns.
  • the degree of compression of the resource unit offset index can be adjusted by adjusting the basic granularity.
  • the basic granularity is 8 26-tone RU.
  • the partial bandwidth information subfield includes an RU indication index
  • the RU indication index includes a frequency domain indication part and an RU indication part
  • the frequency domain indication part is used to indicate a feedback channel required by the station
  • the frequency domain range where the RU of the status information is located and the RU indication part is used to indicate the RU that needs to feed back the channel status information.
  • the RU that needs to feed back channel state information may be one RU or a combination of multiple RUs.
  • the partial bandwidth information subfield indicates the partial bandwidth information in the same bandwidth, requires fewer bits, and has a smaller signaling overhead, so that it can support indicating RUs in a larger bandwidth that need to feedback channel state information, and there are also It helps to make the column number subfield indicate more column numbers.
  • the number of bits of the RU indication index is 9 bits.
  • the number of bits in the frequency domain indication part is 2 bits, and the number of bits in the RU indication part is 7 bits. In this way, a reasonable allocation of the number of bits in the frequency domain indication part and the number of bits in the RU indication part can use a smaller number of bits to indicate RUs in a larger bandwidth that need to feed back channel state information.
  • the partial bandwidth information subfield includes an RU indication index that indicates the RU corresponding to part or all of the bandwidth required by the station to feed back channel state information and the RU in the complete bandwidth.
  • the minimum granularity of the RU indication index indication RU is 242-tone RU, so that it is not necessary to indicate a small RU, thereby helping to reduce the number of bits of the RU indication index and reducing the indication overhead.
  • the partial bandwidth required to feed back channel state information is N*80MHz
  • the RU indicator index includes a 4-bit bitmap, each bit of the bitmap corresponds to an 80MHz, and each bit in the bitmap is used to indicate whether the 80MHz corresponding to the bit is required for feedback of channel state information Part of the bandwidth.
  • the bandwidth required to feed back channel state information is a complete bandwidth
  • the RU indication index is the first index used to indicate the complete bandwidth.
  • the complete bandwidth is one of 20MHz, 40MHz, 80MHz, 160MHz or 320MHz.
  • the RU indication index is 5 bits, 6 bits or 7 bits.
  • the RU indication index when the RU indication index is 5 bits, the RU indication index only indicates a single RU.
  • the RU indicated by the RU indicator index can be 242-tone RU, 484-tone RU, 484+996-tone RU, 242+484-tone RU, 996-tone RU, 2*996-tone One of RU, 3*996-tone RU, or 4*996-tone RU.
  • the RU indicated by the RU indicator index can be 242-tone RU, 484-tone RU, 484+996-tone RU, 242+484-tone RU, 996-tone RU, 2*996-tone One of RU, 2*996+484-tone RU, 3*996-tone RU, 3*996+484-tone RU, or 4*996-tone RU.
  • the partial bandwidth information subfield includes a resource unit start index and a resource unit end index
  • the resource unit start index is used to indicate the first RU that the station needs to feed back channel state information.
  • the resource unit end index is used to indicate the last RU that the station needs to feed back channel state information
  • the first RU is (k 1 *n+c 1 )*26-tone RU, c 1 , k 1 is a positive integer, n is a natural number, the last RU is (k 2 *m+c 2 )*26-tone RU, c 2 , k 2 are positive integers, m is a natural number, and the start index of the resource unit
  • the resource unit end index indicates that the m indicates the last RU, k 1 ⁇ 2 and/or k 2 ⁇ 2.
  • the degree of compression of part of the bandwidth information subfields by adjusting the value of either or both of k 1 or k 2.
  • the greater the degree of compression the smaller the number of bits required to indicate the same partial bandwidth information.
  • the partial bandwidth information subfield can support indicating RUs that need to feed back channel state information in a larger bandwidth.
  • the number of bytes of the site information field may be 4 bytes.
  • the station information field can instruct the station to perform channel detection with a bandwidth greater than 160 MHz and/or with a flow number greater than 8, and feed back beamforming reports according to the channel detection results.
  • the number of bytes in the site information field of the EHT NDPA frame is consistent with the number of bytes in the site information field of the HE NDPA frame, compared to the solution where the number of bytes in the site information field of the EHT NDPA frame is set to 6 bytes.
  • the 4-byte site information field can avoid misreading by HE STA. Because HE STA may not be able to accurately identify the type of EHT NDPA frame, it regards EHT NDPA frame as HE NDPA frame, and reads EHT NDPA frame according to the structure of HE NDPA frame.
  • HE STA will read the first 11 bits of the third 2 bytes as the AID. If the third 2 words of the EHT NDPA frame The first 11 bits of the section coincide with the AID of the HE STA, and the HE STA will mistake the third 2 bytes and the 2 bytes after the third 2 bytes as its own site information field. This will cause HE STA misreading due to bit error reading.
  • the 4-byte site information field provided in this application is consistent with the number of bytes in the site information field of the HE NDPA frame.
  • the first 11 bits of every 2 bytes of the station information field of the EHT NDPA frame are the AID of the EHT STA. Even if HE STA treats EHT NDPA frame as HE NDPA frame, and reads EHT NDPA frame according to the structure of HE NDPA frame, HE STA will recognize that the first 11 bits of every 2 bytes do not match its own AID, so it can be effective To avoid misreading of HE STA.
  • the implementation manners of the present application also provide a method for transmitting NDPA frames, including:
  • the access point generates an NDPA frame, the NDPA frame includes at least two site information fields, where the two site information fields include an AID subfield indicating the association identifier AID of the same site; the access point sends the NDPA frame .
  • the two site information fields meet at least one of the following:
  • Part of the bandwidth information subfields in the two station information fields together indicate the RU that the station needs to feed back channel state information, and the bandwidth corresponding to the NDPA frame is greater than 160 MHz; or
  • the column number subfield in one site information field and the column number subfield in the other site information field of the two site information fields indicate the number of columns of the compressed beamforming feedback matrix, and the number of columns indicated by the column number subfield is greater than 8. ;
  • the access point sends NDPA frames.
  • the implementation manners of the present application also provide a method for transmitting NDPA frames, including:
  • a station receives an NDPA frame, the NDPA frame includes at least two station information fields, where the two station information fields include an AID subfield indicating an association identifier AID of the same station; the access point sends the NDPA frame.
  • the two site information fields meet at least one of the following:
  • Part of the bandwidth information subfields in the two station information fields together indicate the RU that the station needs to feed back channel state information, and the bandwidth corresponding to the NDPA frame is greater than 160 MHz; or
  • the column number subfield in one site information field and the column number subfield in the other site information field of the two site information fields indicate the number of columns of the compressed beamforming feedback matrix, and the number of columns indicated by the column number subfield is greater than 8. ;
  • the station obtains the RU that needs to feed back channel state information from the NDPA frame.
  • the embodiments of the present application also provide a transmission device, including a processing unit and a sending unit,
  • the processing unit is configured to generate an NDPA frame, where the NDPA frame includes at least two site information fields, where the two site information fields include an AID subfield indicating the association identifier AID of the same site; the access point sends the NDPA frame.
  • the two site information fields meet at least one of the following:
  • Part of the bandwidth information subfields in the two station information fields together indicate the RU that the station needs to feed back channel state information, and the bandwidth corresponding to the NDPA frame is greater than 160 MHz; or
  • the column number subfield in one site information field and the column number subfield in the other site information field of the two site information fields indicate the number of columns of the compressed beamforming feedback matrix, and the number of columns indicated by the column number subfield is greater than 8. ;
  • the sending unit is used to send NDPA frames.
  • embodiments of the present application also provide a transmission device, including a processing unit and a receiving unit;
  • the receiving unit is configured to receive an NDPA frame, where the NDPA frame includes at least two site information fields, where the two site information fields include an AID subfield indicating the association identifier AID of the same site; the access point sends the NDPA frame.
  • the two site information fields meet at least one of the following:
  • Part of the bandwidth information subfields in the two station information fields together indicate the RU that the station needs to feed back channel state information, and the bandwidth corresponding to the NDPA frame is greater than 160 MHz; or
  • the column number subfield in one site information field and the column number subfield in the other site information field of the two site information fields indicate the number of columns of the compressed beamforming feedback matrix, and the number of columns indicated by the column number subfield is greater than 8. ;
  • the processing unit is used to obtain an RU that needs to feedback channel state information from the NDPA frame.
  • Two RUs in the bandwidth greater than 160MHz that need to feed back channel state information in conjunction with the partial bandwidth information subfield in the station information field can instruct the station to perform channel detection of the bandwidth greater than 160MHz, and feed back beamforming reports based on the channel detection results , which can realize the use of larger bandwidth to transmit data and improve transmission efficiency.
  • the two column numbers subfields in the station information field indicate the number of columns greater than 8, which can instruct the station to perform channel detection with a bandwidth greater than 8, and feed back beamforming reports based on the channel detection results, thereby enabling more utilization Stream data to improve transmission efficiency.
  • the start index of the resource unit in one site information field of the two site information fields and the other indicates the first RU of the channel state information that the site needs to feed back in the bandwidth corresponding to the NDPA frame
  • the resource unit end index in the other station information field indicates the last RU of the channel state information that the station needs to feed back; for example, the resource unit start index in a station information field has 7 bits, so
  • the resource unit start index in the other site information field is 1 bit
  • the number of bits of the resource unit end index in the one site information field is 1 bit
  • the resource unit end index in the other site information field is less than 1 bit.
  • the number of bits is 1 bit.
  • one of the two site information fields includes a resource unit start index, which is used to indicate the first RU of the channel state information that the site needs to feed back, and the other The station information field includes the resource unit end index, which is used to indicate the last RU of the channel state information that the station needs to feed back.
  • the number of bits in the column number subfield in one site information field is 3 bits, and the number of bits in the column number subfield in the other site information field is 1 bit.
  • the NDPA frame includes type information, and the type information indicates that the NDPA frame is a very high throughput EHT NDPA frame.
  • the NDPA frame further includes a probe dialogue token field and a special site information field, the probe dialogue token field includes a frame category subfield, and the special site information field includes a frame subcategory subfield,
  • the type information is carried in the frame type subfield and the frame subtype subfield; the frame type subfield indicates that the NDPA frame is a non-HE NDPA frame and a non-ranging NDPA frame, and the frame subtype subfield Indicates that the NDPA frame is an EHT NDPA frame.
  • the special site information field also includes a special AID, and the special AID indicates that the site information field is a special site information field.
  • the special AID may be, for example, but not limited to 2047.
  • the implementation manners of the present application also provide a method for transmitting NDPA frames, including:
  • the access point generates an NDPA frame.
  • the NDPA frame includes a probe dialog token field, a special site information field, and a site information field;
  • the probe dialog token field includes a frame category subfield, and the special site information field includes a frame subcategory subfield.
  • the frame type subfield indicates that the NDPA frame is a non-HE NDPA frame and a non-Ranging NDPA frame, and the frame subtype subfield indicates that the NDPA frame is an EHT NDPA frame;
  • the access point sends NDPA frames.
  • an implementation manner of the present application also provides a method for transmitting NDPA frames, including:
  • the station receives the NDPA frame.
  • the NDPA frame includes a probe dialogue token field, a special site information field, and a site information field;
  • the probe dialogue token field includes a frame category subfield, and the special site information field includes a frame subcategory subfield;
  • the frame type subfield indicates that the NDPA frame is a non-HE NDPA frame and a non-Ranging NDPA frame, and the frame subtype subfield indicates that the NDPA frame is an EHT NDPA frame;
  • the station obtains the frame type subfield and the frame subtype subfield from the NDPA frame to determine that the NDPA frame is an EHT NDPA frame.
  • an embodiment of the present application also provides a transmission device, including a processing unit and a sending unit,
  • the processing unit is used to generate an NDPA frame.
  • the NDPA frame includes a probe dialogue token field, a special site information field, and a site information field;
  • the probe dialogue token field includes a frame category subfield, and the special site information field includes a frame subcategory subfield.
  • the frame type subfield indicates that the NDPA frame is a non-HE NDPA frame and a non-Ranging NDPA frame, and the frame subtype subfield indicates that the NDPA frame is an EHT NDPA frame;
  • the sending unit is used to send NDPA frames.
  • the implementation mode of the present application also provides a transmission device, including a processing unit and a receiving unit,
  • the receiving unit is used to receive an NDPA frame.
  • the NDPA frame includes a probe dialogue token field, a special site information field, and a site information field;
  • the probe dialogue token field includes a frame category subfield, and the special site information field includes a frame subcategory subfield.
  • the frame type subfield indicates that the NDPA frame is a non-HE NDPA frame and a non-Ranging NDPA frame, and the frame subtype subfield indicates that the NDPA frame is an EHT NDPA frame;
  • the processing unit is configured to obtain the frame type subfield and the frame subtype subfield from the NDPA frame to determine that the NDPA frame is an EHT NDPA frame.
  • the combination of the frame type subfield and the frame subtype subfield indicates that the NDPA frame is an EHT NDPA frame.
  • the EHT NDPA frame can indicate the RU in the bandwidth larger than 160MHz that needs to feed back channel state information, to instruct the station to perform channel detection of the bandwidth larger than 160MHz, and feedback the beamforming report according to the channel detection result, so as to realize the use of larger bandwidth transmission Data, improve transmission efficiency.
  • the EHT NDPA frame can also indicate the number of columns greater than 8, to instruct the station to perform channel detection with a bandwidth greater than 8, and feed back beamforming reports according to the channel detection results, so that more streams can be used to transmit data and improve transmission efficient. Moreover, this does not need to define a new frame, and make full use of the remaining available types in the MAC frame to save resources.
  • the embodiments of the present application also provide a communication device, which may include a processor, a transceiver, and optionally a memory, when the processor executes the computer program or instruction in the memory At this time, the method of any one of the foregoing first aspect, second aspect, fifth aspect, sixth aspect, ninth aspect, or tenth aspect is executed.
  • the embodiments of the present application also provide a computer-readable storage medium having computer instructions stored in the computer-readable storage medium, and the computer instructions instruct a communication device to execute the first, second, and The method of any one of the fifth aspect, the sixth aspect, the ninth aspect, or the tenth aspect.
  • the embodiments of the present application also provide a computer program product, the computer program product includes a computer program, when the computer program is run on a computer, the computer can execute the first and second aspects above , The method of any one of the fifth aspect, the sixth aspect, the ninth aspect, or the tenth aspect.
  • the present application also provides a processor configured to execute any method of the first aspect, the second aspect, the fifth aspect, the sixth aspect, the ninth aspect, or the tenth aspect.
  • the processes of sending the above information and receiving the above information in the above methods can be understood as the process of outputting the above information by the processor and the process of receiving the input information of the processor.
  • the processor when outputting the above-mentioned information, the processor outputs the above-mentioned information to the transceiver for transmission by the transceiver. Furthermore, after the above-mentioned information is output by the processor, other processing may be required before it reaches the transceiver.
  • the transceiver receives the above-mentioned information and inputs it into the processor. Furthermore, after the transceiver receives the above-mentioned information, the above-mentioned information may need to undergo other processing before being input to the processor.
  • the processor outputs and receives, inputs and other operations, instead of transmitting, sending, and receiving directly by the radio frequency circuit and antenna.
  • the foregoing processor may be a processor dedicated to executing these methods, or a processor that executes computer instructions in a memory to execute these methods, such as a general-purpose processor.
  • the above-mentioned memory may be a non-transitory memory, such as a read only memory (ROM), which may be integrated with the processor on the same chip, or may be separately arranged on different chips.
  • ROM read only memory
  • the present invention The embodiment does not limit the type of the memory and the setting mode of the memory and the processor.
  • the present application provides a chip system, which includes a processor and an interface, and is used to support a communication transmission device to implement the functions involved in the method of any one of the first to fourth aspects, for example, Determine or process at least one of the data and information involved in the above methods.
  • the chip system further includes a memory, and the memory is used to store necessary information and data of the aforementioned communication device.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • this application provides a functional entity that is used to implement the method described in the first, second, fifth, sixth, ninth, or tenth aspect.
  • FIG. 1 is a schematic diagram of a network architecture of a communication system involved in an embodiment of this application;
  • FIG. 2 is a schematic structural diagram of a communication device involved in an embodiment of the application
  • FIG. 3 is a schematic structural diagram of a chip provided by an embodiment of the application.
  • Figure 4A is a schematic diagram of the structure of the VHT NDPA frame involved in this application.
  • FIG. 4B is a schematic diagram of the structure of the HE NDPA frame involved in this application.
  • FIG. 5 is a schematic flowchart of a method for transmitting an NDPA frame provided by an embodiment of the application
  • FIG. 6 is a schematic diagram of the structure of an NDPA frame provided by an embodiment of the application.
  • FIG. 7 is a schematic diagram of the structure of a site information field provided by an embodiment of the application.
  • FIG. 8 is a schematic structural diagram of another site information field provided by an embodiment of this application.
  • FIG. 9 is a schematic structural diagram of another NDPA frame provided by an embodiment of the application.
  • FIG. 10 is a schematic structural diagram of another NDPA frame provided by an embodiment of this application.
  • FIG. 11 is a schematic structural diagram of another NDPA frame provided by an embodiment of this application.
  • FIG. 12 is a schematic structural diagram of an EHT MIMO control field provided by an embodiment of this application.
  • FIG. 13 is a schematic diagram of the structure of a trigger frame provided by an embodiment of the application.
  • Figure 14 is a schematic diagram of the feedback process of the beamforming report
  • 15 is a schematic diagram of modules of a transmission device provided by an embodiment of the application.
  • FIG. 16 is a schematic diagram of modules of a transmission device according to another embodiment of the application.
  • FIG. 17 is a schematic diagram of modules of a transmission device according to another embodiment of this application.
  • FIG. 19 is a schematic diagram of modules of a transmission device according to another embodiment of this application.
  • FIG. 20 is a schematic diagram of modules of a transmission device according to still another embodiment of this application.
  • the embodiment of the present application provides an NDPA transmission method applied to a wireless communication system.
  • the wireless communication system may be a wireless local area network (WLAN) or a cellular network, and the method may be implemented by a communication device in the wireless communication system or a chip or processor in the communication device.
  • the communication device supports the use of IEEE 802.11 series of protocols for communication.
  • the IEEE 802.11 series of protocols include: 802.11be, 802.11ax, or 802.11a/b/g/n/ac.
  • FIG. 1 is a schematic diagram of a network structure provided by an embodiment of the present application.
  • the network structure may be a wireless local area network.
  • the network structure may include one or more access point (AP)-type sites and one or more non-access points.
  • Entry point station (none access point station, non-AP STA).
  • this article refers to the access point type of station as an access point (AP), and the non-access point type of station as a station (STA).
  • the APs are, for example, AP1 and AP2 in FIG. 1
  • the STAs are, for example, STA1 and STA2 in FIG. 1.
  • the access point can be the access point for terminal equipment (such as mobile phones) to enter the wired (or wireless) network. It is mainly deployed in homes, buildings and parks. The typical coverage radius is tens of meters to hundreds of meters. Can be deployed outdoors.
  • the access point is equivalent to a bridge connecting the wired network and the wireless network. The main function is to connect each wireless network client together, and then connect the wireless network to the Ethernet.
  • the access point may be a terminal device (such as a mobile phone) or a network device (such as a router) with a wireless fidelity (WiFi) chip.
  • WiFi wireless fidelity
  • the access point can be a device that supports the 802.11be standard.
  • the access point may also be a device supporting multiple wireless local area networks (WLAN) standards of the 802.11 family such as 802.11be, 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.
  • WLAN wireless local area networks
  • the access point in this application can be an extremely high throughput (EHT) AP, or it can be an access point suitable for a future generation of WiFi standards.
  • EHT extremely high throughput
  • the access point may include a processor and a transceiver, the processor is used to control and manage the actions of the access point, and the transceiver is used to receive or send information.
  • the site can be a wireless communication chip, a wireless sensor, or a wireless communication terminal, etc., and can also be referred to as a user.
  • the site can be a mobile phone that supports WiFi communication function, a tablet computer that supports WiFi communication function, a set-top box that supports WiFi communication function, a smart TV that supports WiFi communication function, a smart wearable device that supports WiFi communication function, and WiFi communication function is supported.
  • the station can support the 802.11be standard.
  • the site can also support multiple wireless local area networks (WLAN) standards of the 802.11 family such as 802.11be, 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.
  • WLAN wireless local area networks
  • the station may include a processor and a transceiver.
  • the processor is used to control and manage the actions of the access point, and the transceiver is used to receive or send information.
  • the access point in this application may be an extremely high throughput (EHT) STA, or may be an STA applicable to a future generation of WiFi standards.
  • EHT extremely high throughput
  • access points and sites can be devices used in the Internet of Vehicles, Internet of Things (IoT) nodes, sensors, etc., smart cameras, smart remote controls, smart water meters, and electricity meters in smart homes. And sensors in smart cities, etc.
  • IoT Internet of Things
  • the access points and stations involved in the embodiments of the present application can also be collectively referred to as communication devices, which can include hardware structures and software modules, and implement the above-mentioned functions in the form of hardware structures, software modules, or hardware structures plus software modules. .
  • communication devices can include hardware structures and software modules, and implement the above-mentioned functions in the form of hardware structures, software modules, or hardware structures plus software modules.
  • One of the above-mentioned functions can be implemented in a hardware structure, a software module, or a hardware structure plus a software module.
  • FIG. 2 is a schematic structural diagram of a communication device provided by an embodiment of the application.
  • the communication device 200 may include a processor 201, a transceiver 205, and optionally a memory 202.
  • the transceiver 205 may be called a transceiver unit, a transceiver, or a transceiver circuit, etc., for implementing the transceiver function.
  • the transceiver 205 may include a receiver and a transmitter.
  • the receiver may be referred to as a receiver or a receiving circuit, etc., to implement a receiving function;
  • the transmitter may be referred to as a transmitter or a transmitting circuit, etc., to implement a transmitting function.
  • the memory 202 may store a computer program or software code or instruction 204, and the computer program or software code or instruction 204 may also be referred to as firmware.
  • the processor 201 can control the MAC layer and the PHY layer by running the computer program or software code or instruction 203 therein, or by calling the computer program or software code or instruction 204 stored in the memory 202, so as to realize the following aspects of this application.
  • the NDPA transmission method provided by the embodiment.
  • the processor 201 may be a central processing unit (CPU), and the memory 202 may be, for example, a read-only memory (ROM) or a random access memory (RAM).
  • the processor 201 and the transceiver 205 described in this application can be implemented in an integrated circuit (IC), analog IC, radio frequency integrated circuit RFIC, mixed signal IC, application specific integrated circuit (ASIC), printed circuit Printed circuit board (PCB), electronic equipment, etc.
  • IC integrated circuit
  • analog IC analog IC
  • radio frequency integrated circuit RFIC radio frequency integrated circuit
  • mixed signal IC mixed signal IC
  • ASIC application specific integrated circuit
  • PCB printed circuit Printed circuit board
  • electronic equipment etc.
  • the above-mentioned communication device 200 may further include an antenna 206, and each module included in the communication device 200 is only an example for illustration, and this application is not limited thereto.
  • the communication device 200 described in the above embodiment may be an access point or a station, but the scope of the communication device described in this application is not limited to this, and the structure of the communication device may not be limited by FIG. 2.
  • the communication device may be a stand-alone device or may be part of a larger device.
  • the implementation form of the communication device may be:
  • Independent integrated circuit IC or chip, or, chip system or subsystem
  • the IC collection may also include storage for storing data and instructions Components; (3) Modules that can be embedded in other devices; (4) Receivers, smart terminals, wireless devices, handhelds, mobile units, vehicle-mounted devices, cloud devices, artificial intelligence devices, etc.; (5) Others, etc. .
  • the chip shown in FIG. 3 includes a processor 301 and an interface 302.
  • the number of processors 301 may be one or more, and the number of interfaces 302 may be more than one.
  • the interface 302 is used for signal reception and transmission.
  • the chip or chip system may include a memory 303.
  • the memory 303 is used to store program instructions and data necessary for the chip or the chip system.
  • WLAN started from the 802.11a/g standard, has gone through multi-band standards, such as 802.11n, 802.11ac, and now 802.11ax, which is under discussion. There will be different variants of the NDPA frame in different standards.
  • FIG. 4A is a schematic diagram of the structure of a VHT NDPA frame.
  • the VHT NDPA frame includes a frame control (frame control) field, a duration field, a receiving address (RA) field, a transmitting address (TA) field, and a sounding dialog token (Sounding Dialog Token) Field and one or more site information fields (STA information, STA Info).
  • the frame control field includes the frame type and subtype subfields to indicate that the frame is an NDPA frame.
  • the probe dialog token field is used to index the sequence number of channel probes.
  • the RA field and the TA field are used to identify the receiving end and the sending end of the MAC frame.
  • the site information field includes an AID subfield indicating an association identifier (AID), a feedback type (feedback type) subfield, and a number of columns (Nc) subfield.
  • AID association identifier
  • feedback type feedback type
  • Nc number of columns
  • the AID subfield indicates the AID of the site corresponding to the site information field.
  • the feedback type subfield indicates whether the feedback is single-user or multi-user feedback.
  • the number of columns (Nc) subfield indicates the number of columns of channel state information that the station needs to feed back. It can also be understood to indicate the number of spatial streams that the station needs to feed back channel state information.
  • the corresponding variant of the NDPA frame is the high throughput (HE) NDPA frame.
  • FIG. 4B is a schematic structural diagram of an HE NDPA frame.
  • the HE NDPA frame includes a frame control field, a duration field, an RA field, a TA field, a probe dialog token field, and one or more site information fields.
  • the number of bytes of the detection dialog token can be 1 byte, that is, the number of bits of the detection dialog token can be 8 bits, which are B0-B7, respectively.
  • the probe dialog token field includes a subfield indicating the 1-bit frame type. The frame type subfield is located in B1 of the probe dialog token, and is used to indicate whether the NDPA frame is a HE NDPA frame. 0 indicates that the NDPA frame is a non-HE NDPA frame, and 1 indicates that the NDPA frame is a HE NDPA frame.
  • the site information field includes AID subfield, partial bandwidth information (partial BW Info) subfield, feedback type and packet (feedback type and Ng) subfield, disambiguation (disambiguation) subfield, codebook (codebook Size) size subfield and The number of columns (Nc) subfield.
  • the number of bytes of one site word information is 4 bytes.
  • the AID subfield and the column number subfield have the same purpose as the AID subfield and the column number subfield in the above-mentioned VHT NDPA.
  • the partial bandwidth information subfield indicates the frequency domain range in which the station corresponding to the AID needs to feedback the channel state information.
  • the bandwidth used for data transmission can be divided into one or more resource units (RU).
  • the size of RU can be 26-tone RU, 52-tone RU, 106-tone RU, 242-tone, 484-tone, 996-tone and so on.
  • tone represents sub-carriers, for example, 26-tone RU represents an RU composed of 26 sub-carriers.
  • the 20MHz frequency domain resource can be composed of a resource unit (242-tone RU) composed of a whole 242 subcarriers, or it can be composed of 9 26-tone RUs.
  • the aforementioned partial bandwidth information subfield indicates the frequency domain range of channel state information that the station needs to feedback by indicating a continuous 26-toneRU. That is, the partial bandwidth information subfield indicates the RU that the STA corresponding to the AID needs to feed back the channel state information, so as to realize the frequency domain range indicating the part of the bandwidth that the station needs to feed back the channel state information. It should be understood that the frequency domain range of this part of the bandwidth belongs to the bandwidth corresponding to the NDPA frame.
  • the partial bandwidth information subfield includes a resource unit start index and a resource unit end index, and a continuous RU is indicated by the resource unit start index and the resource unit end index.
  • the maximum bandwidth of 802.11ax is 160MHz and consists of 74 26-tone RUs. Therefore, the starting index of RU needs to The bit indicates the first RU that the station corresponding to the AID needs to feed back channel state information, and the end index of the RU requires 7 bits to indicate the last RU that the station needs to feed back channel state information. Is rounded up.
  • the feedback type and the Ng subfield indicate whether the feedback is single-user feedback or multi-user feedback, and indicate that Ng subcarriers are grouped into a group. In this way, the subcarriers of the same group feed back the channel state information uniformly, which helps to save overhead.
  • the disambiguation subfield is used to avoid misreading the VHT NDPA frame by the VHT STA.
  • the VHT STA in this application refers to the old version of the VHT STA that supports the 802.11ac protocol and does not support the NDPA frame variant after the VHT NDPA frame.
  • the codebook size (codebook size) subfield indicates the accuracy of quantization, and different accuracy corresponds to different overhead.
  • the site has a maximum of 8 antennas, and the number of columns supported is a maximum of 8, so the column number subfield requires The bit indicates that the number of columns is a certain value from 1 to 8.
  • the corresponding variant of the NDPA frame is the Ranging NDPA frame.
  • the structure of the Ranging NDPA frame is basically the same as the structure of the HE NDPA frame.
  • the number of bits in the frame type subfield is 2 bits, and the 2 bits are B0 and B1 in the above B0-B7.
  • One bit (B1) is used to indicate whether the NDPA frame is a HE NDPA frame, and the other bit (B0) is used to indicate whether the NDPA frame is a Ranging NDPA frame.
  • Ranging STA determines the variant of the NDPA frame according to the 2-bit frame type subfield. The specific indication relationship of the frame type subfield is shown in Table 1 below.
  • the HE STA does not read the bit used to indicate whether it is a Ranging NDPA frame in the frame type subfield.
  • the HE STA in this application refers to the old version of the HE STA that supports the 802.11ax protocol and does not support the NDPA frame variant after the HE NDPA frame.
  • the Ranging STA in this application refers to the old version of the Ranging STA that supports the 802.11az protocol and does not support the NDPA frame variant after the Ranging NDPA frame.
  • the maximum bandwidth of 802.11ax is 160MHz, and some bandwidth information subfields can be indicated through 74 26-tone RUs.
  • the 74 26-tone RUs are in the order of the corresponding frequency from low to high, and the corresponding serial number values are 0, 1, 2, 3, ..., 73.
  • the partial bandwidth information subfield is indicated as follows: the resource unit start index of the partial bandwidth information indicates one of 74 26-tone RUs, and the resource unit end index is used to indicate one of the 74 26-tone RUs. Specifically, the resource unit start index indicates one of the 74 26-tone RUs by indicating the value of the sequence number of the 26-tone RU; the resource unit end index indicates 74 26-tone RUs by the value of the sequence number indicating the 26-tone RU. RU one of them.
  • the start index of the RU in some bandwidth information subfields only supports one RU among the 74 26-tone RUs
  • the end index of the RU only supports one RU among the 74 26-tone RUs.
  • the 802.11be standard can support a maximum bandwidth of 320MHz.
  • 320MHz can correspond to 148 26-tone RUs at most, and 148 situations need to be indicated.
  • some bandwidth information subfields in the HE NDPA frame cannot meet the requirements of 802.11 Under the be standard, it indicates the needs of RUs that need to feed back channel state information in a larger bandwidth.
  • the maximum number of columns in 802.11ax is 8
  • the 3-bit column number subfield in the HE NDPA frame indicates the number of columns by indicating the value in 1-8.
  • the maximum number of columns that need to be indicated is 16 columns.
  • the column number subfield in the HE NDPA frame cannot meet the requirement of indicating more columns under the 802.11be standard.
  • the NDPA frame includes various fields and subfields. It should be understood that the embodiments of the present application do not limit the naming of the various fields and subfields in the NDPA frame. In other embodiments, they can also be replaced with other names. .
  • FIG. 5 is a schematic flowchart of a method for transmitting an NDPA frame according to an embodiment of the application. The method includes the following steps:
  • a beamformer (Beamformer, Bfer) generates an NDPA frame
  • the NDPA frame includes one or more station information fields.
  • the site information field includes an AID subfield indicating an AID, a partial bandwidth information subfield, and/or a column number subfield.
  • the partial bandwidth information subfield indicates the RUs that the beamforming responder (Beamformee, Bfee) corresponding to the AID needs to feed back channel state information among the RUs included in the bandwidth corresponding to the NDPA frame. It can also be understood that part of the bandwidth information subfield indicates the RU that the Bfer requires feedback.
  • the RU that the station needs to feed back channel state information or the RU that the Bfer needs to feed back may be one RU or a combination of multiple RUs.
  • the RU indicated by the partial bandwidth information subfield is a continuous RU, and is not limited to a continuous 26-tone RU.
  • it can indicate a continuous 52-tone RU, a continuous 242-tone RU, or Indicates a combination of consecutive multiple RUs of different sizes.
  • the RU indicated by some bandwidth information subfields is not necessarily an actual RU.
  • the RU corresponds to the subcarrier.
  • the partial bandwidth information subfield indicates the range of subcarriers by indicating the RU in the bandwidth, thereby indicating the frequency domain range of the partial bandwidth required by the Bfer to be fed back. For example, using 320MHz as 148 26-tone RUs does not mean that the 320MHz bandwidth includes 148 26-tone RUs.
  • the RU indicated by the partial bandwidth information subfield is only used to indicate the corresponding frequency domain range.
  • the bandwidth corresponding to the NDPA frame is greater than 160 MHz, or the number of columns indicated by the column number subfield is greater than 8, or the bandwidth corresponding to the NDPA frame is greater than 160 MHz, and the number of columns indicated by the column number subfield is greater than 8.
  • the bandwidth corresponding to the NDPA frame can be understood as the bandwidth of channel detection.
  • the bandwidth corresponding to the NDPA frame is the bandwidth of the NDP sent by the AP after sending the NDPA frame.
  • the site information field may include any one of the partial bandwidth information subfield and the column number subfield, and may also include the partial bandwidth information subfield and the column number subfield.
  • the NDPA frame in the embodiment of the application conforms to any of the bandwidth corresponding to the NDPA frame being greater than 160 MHz and the number of columns indicated by the column number subfield is greater than 8; or the bandwidth corresponding to the NDPA frame is greater than 160 MHz and the number of columns indicated by the column number subfield is greater than 8.
  • the Bfer sends an NDPA frame.
  • the Bfee receives the NDPA frame, and obtains relevant channel detection parameters from the NDPA frame, for example, obtains partial bandwidth information and/or the number of columns of the compressed beamforming feedback matrix.
  • Bfer can be AP or STA.
  • Bfee can be STA or AP.
  • the beamforming responder can start the channel measurement procedure.
  • the channel measurement procedure may include:
  • the Bfer sends a null data packet (NDP);
  • the Bfer sends the NDP after a short inter-frame space (SIFS).
  • SIFS short inter-frame space
  • the Bfee after receiving the NDPA frame SIFS, the Bfee receives the NDP according to the relevant channel detection parameters obtained from the DNPA frame.
  • the Bfee performs channel estimation through NDP according to the indication information in the NDPA frame, obtains channel state information, and forms a beamforming report according to the channel state information;
  • Bfee determines that the AID subfield matches its own AID according to the AID subfield in the station information field in the NDPA frame, and Bfee determines that it needs to perform channel detection.
  • Bfee can determine the frequency range where the channel state information needs to be fed back according to part of the bandwidth information subfield in the station information field, and then perform channel estimation through NDP to obtain channel state information in the frequency range where the station needs to feed back the channel state information.
  • Bfee may also determine the number of columns of the compressed beamforming feedback matrix according to Nc, the compressed beamforming feedback matrix is a part of the beamforming report, and the compressed beamforming feedback matrix carries at least part of the channel state information.
  • Bfee sends a beamforming report.
  • the beamforming report includes channel state information.
  • Bfer can be AP or STA.
  • Bfee can be STA or AP.
  • Bfer is used as AP and Bfee is used as STA for illustration. It should be understood that the technical solutions of the embodiments of the present application are also applicable to the case where Bfer is STA or Bfee is AP.
  • the channel measurement process is not limited to the solutions 503 to 505 proposed in the embodiments of this application.
  • the channel measurement process may also be that another beamforming initiator sends an NDP frame, and the beamforming responder performs measurement based on the NDP frame. .
  • part of the bandwidth information subfield of the NDPA frame indicates the RU that needs to feed back channel state information in the bandwidth greater than 160MHz.
  • the station information field can instruct the station to perform channel detection of the bandwidth greater than 160MHz, and according to the channel The detection result is fed back to the beamforming report, so that a larger bandwidth can be used to transmit data and the transmission efficiency can be improved.
  • the number of columns indicated by the column number subfield is greater than 8.
  • the station information field can instruct stations to perform channel detection with a bandwidth greater than 8 columns, and feed back beamforming reports according to the channel detection results, so that more streams can be used to transmit data and improve transmission efficiency.
  • the NDPA frame includes type information, and the type information is used to indicate a variant of the NDPA frame.
  • the type information indicates that the NDPA frame is an EHT NDPA frame. This type of information is carried in the field before one or more site information fields.
  • the station when it receives the NDPA frame, it first obtains the type information from the NDPA frame, determines the variant of the NDPA frame according to the type information, and then determines the reading strategy for reading the station information field according to the variant of the NDPA frame.
  • the station is EHT STA
  • the type information indicates that the variant of the NDPA frame is EHT NDPA frame.
  • the EHT STA reads the site information field according to the structure of the site information field of the EHT NDPA frame.
  • the EHT STA obtains the station information field containing its own AID, and obtains relevant channel sounding parameters from the station information field (for example, RUs in a bandwidth greater than 160 MHz that need to feed back channel state information and/or indicate the number of columns greater than 8). Then the EHT STA receives the NDP according to the parameters of the relevant channel detection, and then obtains the channel state information according to the NDP and feeds back the channel state information to the access point through the beamforming report.
  • relevant channel sounding parameters for example, RUs in a bandwidth greater than 160 MHz that need to feed back channel state information and/or indicate the number of columns greater than 8.
  • the type information can indicate that a new NDPA frame variant is an EHT NDPA frame.
  • the EHT NDPA frame can indicate the RU in the bandwidth larger than 160MHz that needs to feed back channel state information, to instruct the station to perform channel detection of the bandwidth larger than 160MHz, and feedback the beamforming report according to the channel detection result, so as to realize the use of larger bandwidth transmission Data, improve transmission efficiency.
  • the EHT NDPA frame can also indicate the number of columns greater than 8, to instruct the station to perform channel detection with a bandwidth greater than 8, and feed back beamforming reports according to the channel detection results, so that more streams can be used to transmit data and improve transmission efficient. Moreover, this does not need to define a new frame, and make full use of the remaining available types in the MAC frame to save resources.
  • the EHT STA can also read the NDPA frame according to the format corresponding to the VHT NDPA frame, HE NDPA frame, or Ranging NDPA frame, respectively.
  • the solution for indicating type information in the embodiments of this application is not limited to the scenario where the variant of the NDPA frame is an EHT NDPA frame, and it is also applicable to indicating that the variant of the NDPA frame is a new NDPA frame corresponding to the standard after 802.11be. Variation scene.
  • the NDPA frame also includes a probe dialog token, and the probe dialog token includes a frame type indication field.
  • the probe dialog token field includes a 2-bit frame type indication field.
  • the value of the 2 bits of the frame type subfield are both 1, indicating a new NDPA frame variant.
  • the new variant may be an EHT NDPA frame corresponding to 802.11be, or an NDPA frame corresponding to a standard after 802.11be, for example.
  • the variation of the NDPA frame sent by the AP is the EHT NDPA frame
  • the frame type subfield in the probe dialog token field indicates that the variation of the NDPA frame is the EHT NDPA frame as an example for description.
  • the above-mentioned type information is carried in the frame type subfield.
  • a new NDPA frame variant as an EHT NDPA frame, and there is no need to change the correspondence between the value of the existing frame category subfield and the indicated NDPA frame variant.
  • the EHT STA receives the NDPA frame from the AP, and determines the variant of the NDPA frame by reading the 2-bit frame category subfield of the NDPA frame.
  • the frame type subfield indicates that the variant of the NDPA frame is an EHT NDPA frame.
  • the EHT STA determines that the NDPA frame is an EHT NDPA frame according to the special frame category subfield.
  • the EHT STA can read the station information field in the EHT NDPA frame according to the format of the EHT NDPA frame.
  • the EHT NDPA frame can indicate the RUs in the bandwidth greater than 160MHz that need to feed back channel state information, so that the station can perform channel detection of the bandwidth greater than 160MHz, and feed back beamforming reports according to the channel detection results, so as to realize the use of larger bandwidth Transmit data and improve transmission efficiency.
  • the EHT NDPA frame can also indicate the number of columns greater than 8, so that the station can perform channel detection with a bandwidth greater than 8, and feed back beamforming reports based on the channel detection results, so that more streams can be used to transmit data and improve transmission efficient.
  • the frame type subfield in the probe dialog token field indicates that the variant of the NDPA frame is an EHT NDPA frame.
  • the frame type subfield in the probe dialog token field may also indicate that the variant of the NDPA frame is a VHT NDPA frame, a HE NDPA frame, or a Ranging NDPA frame. If the frame type subfield indicates that the NDPA frame is a VHT NDPA frame, a HE NDPA frame, or a Ranging NDPA frame, the EHT STA can also read the NDPA frame according to the format corresponding to the VHT NDPA frame, HE NDPA frame, or Ranging NDPA frame, respectively.
  • the above entry for indicating the Ranging NDPA frame is exchanged with the above entry for indicating the EHT NDPA frame.
  • the variant of the indicated NDPA frame is EHT NDPA frame; indicating Ranging NDPA frame
  • the value of 1 bit of is 1 and the value of 1 bit of indicating whether it is a HE NDPA frame is 1
  • the variant of the indicated NDPA frame is a Ranging NDPA frame.
  • a new variant of NDPA frame can be defined as EHT NDPA frame.
  • the frame type subfield in the probe dialog token field can indicate that the variant type of the frame is EHT NDPA.
  • the EHT NDPA frame can indicate the RU in the bandwidth larger than 160MHz that needs to feed back channel state information, to instruct the station to perform channel detection of the bandwidth larger than 160MHz, and feedback the beamforming report according to the channel detection result, so as to realize the use of larger bandwidth transmission Data, improve transmission efficiency.
  • the EHT NDPA frame can also indicate the number of columns greater than 8, to instruct the station to perform channel detection with a bandwidth greater than 8, and feed back beamforming reports according to the channel detection results, so that more streams can be used to transmit data and improve transmission efficient.
  • the 16n+12th bit (for example, the 28th bit and the 44th bit) of each site information field in the EHT NDPA frame is a disambiguation subfield, and n is a positive integer.
  • the first bit of the station information field corresponds to B0 of the station information field. In this way, the scheme corresponding to Table 3, compared with the scheme corresponding to Table 2, can avoid HE STA misreading.
  • HE STA does not read the 1 bit indicating whether it is a Ranging NDPA frame in the frame type subfield.
  • the HE STA will read the NDPA frame as an HE NDPA frame.
  • the NDPA frame may indeed be an HE NDPA frame, and the NDPA frame may also be an EHT NDPA frame.
  • the number of bytes of the EHT NDPA frame may be greater than 4 bytes, for example, it may be 6 bytes.
  • the HE STA will read the first 11 bits of the third 2 bytes as AID. In this way, if the first 11 bits of the third 2 bytes of the EHT NDPA frame exactly match the AID of the HE STA, the HE STA will use the 2 bytes where the AID is located and the adjacent 2 bytes after the 2 bytes as Reading its own site information fields caused HE STA to misread.
  • HE STA when the value of 1 bit in the NDPA frame indicating whether it is a HE NDPA frame is 0, HE STA can recognize the NDPA frame as a VHT NDPA frame and read it according to the format of the VHT NDPA frame . If the NDPA frame is indeed a VHT NDPA frame, the HE STA can correctly read the VHT NDPA frame. If the NDPA frame is an EHT NDPA frame, the first 11 bits or the first 12 bits of each site information field of the EHT NDPA frame is the AID, and the AID will not be the AID of the HE STA, and the 16n+12th of the EHT NDPA frame The bit is a disambiguation subfield.
  • the first 12 bits of every 2 bytes in the EHT NDPA frame will not match the AID of the HE STA.
  • HE STA reads the EHT NDPA frame as the format of the VHT NDPA frame, and reads the first 12 bits of each 2 bytes of each site information field as the AID, and can also identify each 2 words
  • the first 12 bits of the section are inconsistent with its own AID, which can prevent the HE STA from mistakenly thinking a site information field in the EHT NDPA frame as its own site information field, causing misreading of the NDPA frame.
  • the HE STA can correctly read the HE NDPA frame. If the NDPA frame is actually a Ranging NDPA frame, the structure of the station information field of the Ranging NDPA frame and the station information field of the HE NDPA frame are the same. The HE STA can read the AID in the NDPA frame at the correct position. The station information field of the Ranging NDPA frame will not contain the HE STA’s AID.
  • HE STA can also read the station information field and find that the AID in each station information field does not match its own AID, so it will not consider the NDPA
  • One of the station information fields in the frame is its own station information field, so the NDPA frame will not be misread.
  • the 2-bit frame type subfield indicates the variants of other NDPA frames following the EHT NDPA frame.
  • FIG. 6 is a schematic diagram of the structure of an NDPA frame according to an embodiment of the application.
  • a special site information field is added to the NDPA frame.
  • the special site information fields include special AID and frame sub-category fields.
  • the special AID indicates a special site information field.
  • the special AID may be 2047, indicating that the site information field is a special site information field.
  • the existing standard does not define the AID of 2047, so that the STA can identify the special site information field according to the special AID.
  • the special AID is not limited to 2047, for example, it may also be other undefined AIDs.
  • the frame category subfield in the probe dialog token field and the frame subcategory subfield in the newly added special site information field together indicate a variant of the NDPA frame.
  • the frame type subfield indicates that the NDPA frame is a non-HE NDPA frame and a non-Ranging NDPA frame.
  • the frame sub-category subfield in the special site information field indicates the specific variant of the NDPA frame.
  • the frame subtype subfield in the special site field may indicate that the NDPA frame is EHT NDPA. It should be understood that the frame subtype subfield may also indicate that the variant of the NDPA frame is a variant of other NDPA frames after the EHT NDPA.
  • the above-mentioned type information is carried in the frame category subfield and the frame subcategory subfield.
  • the new NDPA frame variant may be, for example, an EHT NDPA frame or other NDPA frames following the EHT NDPA frame.
  • the STA that supports the new variant of the NDPA frame can determine which variant the NDPA frame is according to the frame subtype subfield in the special station field, so as to read the NDPA frame according to the variant structure of the NDPA frame.
  • the frame type subfield and the frame subtype subfield indicate that the variant of the NDPA frame is EHT NDPA.
  • the EHT STA can determine the NDPA frame as an EHT NDPA frame according to the frame subtype subfield. Then, the EHT STA reads part of the bandwidth information subfield and the column number subfield in the NDPA frame according to the structure of the EHT NDPA frame, so as to accurately obtain the part of the bandwidth information required to feed back the channel state information and the number of columns to be fed back.
  • the EHT STA can also read the NDPA frame according to the format corresponding to the VHT NDPA frame, HE NDPA frame, or Ranging NDPA frame, respectively.
  • the number of bytes of the site information field in the embodiment of the present application is an integer multiple of 2.
  • the number of bytes of the site information field can be 4 bytes, or greater than 4 bytes, for example, 6 bytes.
  • the frame type subfield in the dialog token field is detected, except for HE NDPA frames and Ranging NDPA frames as a type of NDPA frame to indicate, and then the frame subtype subfield in the special station field indicates the specific NDPA frame Which one of the variants can prevent HE STA or Ranging STA from misreading the new variant NDPA.
  • the frame subtype subfield indicates that the NDPA frame is an EHT NDPA frame.
  • the HE STA or Ranging STA can consider the EHT NDPA frame as a VHT NDPA frame according to the frame type subfield in the probe dialog token field, and read the EHT NDPA frame according to the structure of the VHT NDPA frame.
  • the site information field of the EHT NDPA frame does not include the AID of the HE STA or Ranging STA.
  • the old version of HE STA or Ranging STA that receives the EHT NDPA frame will not match its own AID according to the AID in the site information field, and will not respond according to the EHT NDPA frame, thus avoiding the old version of HE STA Or Ranging STA misread EHT NDPA frame.
  • the 16n+12th bit of the special station information field is the disambiguation subfield
  • the 16n+12th bit (for example, the 28th bit) of each station information field is the disambiguation subfield.
  • N is a positive integer.
  • the first bit of the special site information field corresponds to B0 of the special site information field.
  • the first bit of each station information field corresponds to B0 of the station information field.
  • the VHT STA does not read the frame type subfield in the probe dialog token field and cannot identify the variant of the NDPA frame.
  • the embodiment of the present application changes that when the values of the 2 bits of the frame type subfield are all 0, the indicated variant of the NDPA frame will not cause the VHT STA to misread the NDPA frame of other variants.
  • the NDPA frame sent by the AP is EHT DNPA.
  • the first 11 bits of the special site information field and any site information field of the EHT NDPA frame are set with an 11-bit AID.
  • This AID is not the AID of the VHT STA, and the special site information field and any The 16n+12th bit of a site information field is a disambiguation subfield, so in the site information field and special site information field of the EHT NDPA frame, the first 12 bits of every 2 bytes will not be the same as the AID of the VHT STA. match.
  • VHT STA reads the EHT NDPA frame according to the structure of the VHT NDPA frame, and reads the first 12 bits of each 2 bytes of the special site information field or the site information field as the AID, and can also identify each 2 bytes
  • the first 12 bits of are inconsistent with their own AID, which can prevent the VHT STA from mistakenly thinking the special site information field or a site information field in the EHT NDPA frame as its own site information field, which may cause misreading of the NDPA frame.
  • the indication mode of Table 4 does not need to change the original frame type subfield indicating Range. In this way, the Ranging STA can continue to normally recognize the Ranging NDPA frame according to the frame type subfield.
  • the above-mentioned third type of information indication solution can indicate a new NDPA frame variant (such as EHT NDPA), and can prevent VHT STA, HE STA, and Ranging STA from misreading the new variant NDPA frame .
  • a new NDPA frame variant such as EHT NDPA
  • the special site information field may further include a prohibited subchannel bitmap, and the prohibited subchannel bitmap is used to indicate preamble puncturing information.
  • each bit of the prohibited subchannel bitmap corresponds to a granular frequency domain resource, and each bit indicates whether the corresponding frequency domain resource is punctured.
  • the granularity can be 2 n *10 MHz, and n is a positive integer.
  • the granularity can be 20MHz, 40MHz, 80MHz, etc.
  • the number of bits of the prohibited subchannel bitmap can be fixed.
  • the number of bits of the prohibited subchannel bitmap in the EHT NDPA frame can be set to 16 bits, which can indicate preamble puncturing information with a bandwidth of 320 MHz.
  • every 20MHz corresponds to 1 bit of the forbidden subchannel bitmap.
  • the extra bits in the prohibited subchannel bitmap indicate that the corresponding frequency domain resource is punctured.
  • the bandwidth is 240MHz
  • the first 12 bits of the prohibited subchannel bitmap indicate 240MHz preamble puncturing information
  • the last 4 bits indicate that the corresponding frequency domain resource is punctured.
  • the number of bits of the prohibited subchannel bitmap can also be variable.
  • the number of bits of the prohibited subchannel bitmap can be determined according to the bandwidth. For example, in the case of a granularity of 20 MHz, if the bandwidth is 160 MHz, the number of bits of the forbidden subchannel bitmap can be 8 bits; if the bandwidth is 320MHz, the number of bits of the forbidden subchannel bitmap can be 16 bits. In the case of a granularity of 40 MHz, if the bandwidth is 160 MHz, the number of bits of the prohibited subchannel bitmap can be 4 bits; if the bandwidth is 320MHz, the number of bits of the prohibited subchannel bitmap can be 8 bits.
  • the number of bits in the prohibited subchannel bitmap can also be 4 bits, and every 20MHz corresponds to 1 bit in the prohibited subchannel bitmap.
  • the extra bits in the prohibited subchannel bitmap indicate that the corresponding frequency domain resource is punctured. For example, if the bandwidth is 40MHz, the first 2 bits of the prohibited subchannel bitmap are used to indicate the first 20MHz puncturing situation and the second 20MHz puncturing situation in 40MHz, and the last of the prohibited subchannel bitmap 2 bits indicate that the corresponding frequency domain resource is punctured.
  • the prohibited subchannel bitmap may also be carried in the NDP sent by the AP after the NDPA frame. Or, it is forbidden that the sub-channel bitmap is only carried in the NDP.
  • the special site information field further includes a bandwidth indication subfield, which is used to indicate bandwidth.
  • the partial bandwidth indicated by the partial bandwidth information subfield is within the frequency domain range of the bandwidth indicated by the bandwidth indication subfield.
  • the embodiments of the present application provide some design solutions for site information fields.
  • the variation of the NDPA frame sent by the AP is the EHT NDPA frame as an example for description.
  • the design solution of the site information field in this application is not limited to the EHT NDPA frame, and is also applicable to the variant of the NDPA frame corresponding to the standard after 802.11be.
  • the following describes the design scheme of the site information field when the bandwidth corresponding to the NDPA frame is greater than 160 MHz.
  • the number of bytes in the site information field is increased, and the number of bits in some bandwidth information subfields is increased to realize that some bandwidth information subfields indicate a bandwidth greater than 160MHz.
  • RU that needs to feed back channel state information in For example, the number of bytes in the station information field in the NDPA frame may be 6 bytes, and the number of bits in some bandwidth information subfields is greater than 7 bits. This can indicate RUs in a larger bandwidth that need to feed back channel state information.
  • the number of bits in the column number subfield can also be increased.
  • the number of bits in the column number subfield is greater than 3, it can also indicate more columns.
  • the number of bytes of the station information field in the NDPA frame may be 2*N, and N is greater than or equal to 3.
  • the number of bytes of the station information field in the NDPA frame can also be 8, 10, 12, and so on.
  • the 6 bytes can be sequentially divided into 3 2 bytes, and the 12th bit of the 2nd 2 bytes and the 3rd 2 bytes are provided with a disambiguation field.
  • VHT STA reads the NDPA frame according to the number of VHT NDPA frames, and reads the first 12 bits of each 2 bytes as AID, and can also recognize that the first 12 bits of each 2 bytes are the same as its own.
  • the AID does not match, so as to prevent the VHT STA from mistaking a site information field in the NDPA frame of the new variant as its own site information field, which may cause misreading of the NDPA frame of the new variant.
  • part of the bandwidth information subfield in the site information field includes the start index of the RU and the end index of the RU.
  • the number of bits of the start index of the RU is greater than 7 bits, and the number of bits of the end index of the RU is greater than 7 bits.
  • the number of bits in the column number subfield in the station information field is greater than 3 bits.
  • the bandwidth is 320 MHz
  • the length of a site information field is 6 bytes.
  • the structure of the station information field of the EHT NDPA frame is shown in Figure 7.
  • part of the bandwidth information subfield of the site information field includes the start index of the RU and the end index of the RU.
  • the start index of the RU is 8 bits and is used to indicate a 26-tone RU in 320 MHz
  • the end index of the RU is 8 bits and is used to indicate a 26-tone RU in 320 MHz.
  • the 12th bit of the 2nd byte (the 28th bit of the site information field) and the 12th bit of the 2nd byte (the 44th bit of the site information field) are provided with a disambiguation field.
  • the length of the site information field in the VHT NDPA frame is 2 bytes, with a total of 16 bits.
  • the first 12 bits of the station information field in the VHT NDPA frame are AID.
  • the VHT STA device will not read the frame category subfield, nor will it recognize the variants of the NDPA frame.
  • the VHT STA reads the EHT NDPA frame as a VHT NDPA frame, which will cause the VHT STA to read the first 12 bits of each 2 bytes of a site information field in the EHT NDPA frame as the AID.
  • the first 12 bits of the second 2 bytes of a station information field in the EHT NDPA frame will cause misreading.
  • the site information field in the EHT NDPA provided in this embodiment, the first 11 bits of the first 2 bytes are the AID of the EHT STA.
  • the first 12 bits of the first 2 bytes will not match the AID of the VHT STA.
  • the 12th bit (B11) of the second 2 bytes of the station information field is the disambiguation field.
  • the first 12 bits of the second 2 bytes of the station information field will not match the AID of the VHT STA. This can prevent the VHT STA from mistaking one of the site information fields as its own site information field, which may cause the VHT STA to misread the EHT NDPA frame.
  • 320MHz can contain up to 148 26-tone RUs.
  • the start index of the 8-bit RU may indicate one 26-tone RU among the 148 26-tone RUs, and the end index of the 8-bit RU may also indicate one 26-tone RU among the 148 26-tone RUs.
  • the bandwidth corresponding to the NDPA frame is not limited to the 320 MHz in the above example, and may also be 240 MHz, 480 MHz, and other bandwidths greater than 160 MHz.
  • the number of bits in part of the bandwidth information subfield can also be adjusted adaptively according to the size of the bandwidth.
  • first type of site information field design solution can be implemented in combination with the above-mentioned second and third types of information indicating solutions, or can be implemented separately.
  • the EHT NDPA frame adopting the above-mentioned design scheme of the first type of site information field can avoid misreading by the VHT STA by setting the disambiguation field.
  • HE STA will not read the bit indicating whether it is a Range NDPA frame in the frame type subfield, so that HE STA cannot distinguish between HE NDPA frame and EHT NDPA frame.
  • HE STA will read EHT NDPA frames as HE NDPA frames.
  • HE STA When HE STA reads the third 2 bytes of a station information field in the EHT NDPA frame, it will read the first 11 bits of the third 2 bytes as the first 11 bits of the HE NDPA frame. If the first 11 bits of the third 2 bytes of a station information field in the EHT NDPA frame coincide with the AID of the HE STA receiving the EHT NDPA frame, it will cause the HE STA to misread the EHT NDPA frame.
  • the HE STA will read the EHT NDPA frame as a VHT NDPA frame.
  • the station information field of the EHT NDPA frame does not include the AIDs of HE STA, Ranging STA, and VHT STA, and disambiguation subfields are set in other locations that may be considered by HE STA, Ranging STA, or VHT STA to have AIDs, which can avoid HE STA misread EHT NDPA frame.
  • the EHT NDPA frame adopts the first type of site information field design solution, if the third type is used to indicate the type of information, if the bit indication in the frame type subfield indicates whether the HE NDPA frame is 1, it only indicates The NDPA frame is an HE NDPA frame, and there is no other indication.
  • the HE STA can accurately determine whether it is an HE NDPA frame according to the indication of the bit indicating whether it is an HE NDPA frame in the frame type subfield, and does not read other variants of NDPA frames as HE NDPA frames.
  • FIG. 8 is a schematic structural diagram of a station information field in an EHT NDPA frame provided by an embodiment of this application.
  • the number of bytes of the site information field is 4 bytes. Compared with HE NDPA frame, the number of bytes of the site information field is not changed.
  • This solution compresses the number of bits in the subfields of some bandwidth information and improves the indication mode of the subfields of some bandwidth information to indicate RUs in a larger bandwidth that need to feed back channel state information and/or indicate the number of columns greater than 8.
  • the number of bits in part of the bandwidth information subfield can be compressed.
  • the number of bits in part of the bandwidth information subfield can be less than or equal to 13 bits, which can increase the number of bits in the column number subfield so that the number of bits in the column number subfield is greater than or equal to 4 bits, so that the column number subfield can indicate more columns; also While compressing the number of bits in the subfields of part of the bandwidth information, the resource unit start index and resource unit end index can be supported to indicate RUs in a larger bandwidth that need to feed back channel state information.
  • the use of this solution is not limited to the need to increase the number of bits in the column number subfield to be greater than or equal to 4 bits, and the number of bits in the column number subfield can also be 3 bits.
  • part of the bandwidth information subfield of the site information field includes a resource unit start index and a resource unit offset index
  • the resource unit start index is used to indicate the channel state information required by the station corresponding to the AID to be fed back.
  • the resource unit offset index indicates the offset of the last RU for which channel state information needs to be fed back relative to the first RU.
  • the start index of the resource unit indicates the first RU that Bfer requires feedback.
  • the resource unit offset index indicates the offset of the last RU required to be fed back by the Bfer relative to the first RU.
  • the offset can be 0.
  • the offset of the RU indicated by the resource unit offset index does not refer to the RU actually contained in the bandwidth, but the offset of the frequency domain subcarrier is indicated by the offset of the indicated RU, so as to be related to the resource unit.
  • the start index cooperates to indicate a continuous frequency domain range.
  • the site information field is not limited to be used for the EHT NDPA frame, and can also be used for other NDPA frame variants after the EHT NDPA frame.
  • the number of bits of the start index of the resource unit is 8 bits, so that when the bandwidth is 320 MHz, it can indicate one of the 148 26-tone RUs corresponding to 320 MHz.
  • the number of bits of the resource unit offset index may be less than or equal to 5 bits. In this way, the number of bits in a part of the bandwidth information subfield is less than or equal to 13 bits, so that the subfield of the column number subfield can be greater than or equal to 4 bits, so as to indicate more columns.
  • the 28th bit (B27) of the station information field is provided with a disambiguation subfield to avoid misreading by the STA of the old version.
  • a disambiguation subfield to avoid misreading by the STA of the old version.
  • different resource unit offset indexes may be used to indicate offsets of different sizes. The following is an example for a scenario where the bandwidth is 320 MHz.
  • the resource unit offset index is 0010, it indicates that the offset of the last RU required to feed back channel state information relative to the first RU is 52-tone RU.
  • the resource unit start index indicates that the first RU for which the station needs to feed back channel state information is the first 26-tone RU
  • the RU for which the station needs to feed back channel state information is the first 26-tone RU and 52-tone RU adjacent to the first 26-tone RU.
  • the frequency domain range of the channel state information that the site needs to feedback is the frequency domain range corresponding to the first 26-tone RU and the 52-tone RU adjacent to the first 26-tone RU, and the first 78 of the 320MHz frequency is the lowest.
  • the resource unit offset index is 0011, which indicates that the offset of the last RU required to feed back channel state information relative to the first RU is 4*26-tone RU.
  • the bandwidth is 320MHz
  • the first RU is indicated by the resource unit start index and the last RU is indicated by the resource unit end index.
  • the resource unit start index and resource unit end index need 8 respectively.
  • Bits, that is, part of the bandwidth information subfield requires at least 16 bits.
  • 10 resource unit offset indexes can indicate 10 resource offsets of different sizes, and the number of bits of the resource unit offset can be 4 bits. This can reduce the number of bits in part of the bandwidth information subfield. The number of bits saved in this way can be used to increase the number of bits in the column number subfield, so that more space-time streams can be indicated.
  • the corresponding relationship between the resource unit offset index and the offset is not limited to the examples shown in Table 5 or Table 6, and other corresponding relationships can also be set.
  • the number of bits of the resource unit offset index is not limited to 4 bits, and it only needs to satisfy that the number of bits of the start index of the resource unit and the number of bits of the resource unit offset index is less than or equal to 13 bits.
  • the resource unit offset index indicates the offset by indicating the multiple of the RU for which channel state information needs to be fed back with respect to the basic granularity, and the basic granularity is greater than or equal to the RU of 26 subcarriers.
  • the resource unit offset index may indicate the offset by indicating N. N is a positive integer.
  • the bandwidth is 320MHz, including 148 26-tone RUs.
  • the basic granularity is 8*26-tone RU.
  • the number of bits of the resource unit offset can be 5 bits, indicating 20 situations.
  • the resource unit offset index can be 00001. If the offset is 16 26-tone RUs, the resource unit offset index may be 00010.
  • the start index of the resource unit may be 8 bits.
  • the resource unit start index may indicate one RU among 148 26-tone RUs.
  • the STA can determine the first RU and the last RU required to feed back channel state information according to the resource unit start index and the resource unit offset index, or in other words, the STA can use the resource unit start index and the resource unit offset index Determine the range of RUs that need to feed back channel state information.
  • the first RU is the ninth 26-tone RU among the 148 26-tone RUs, and the resource unit offset index If it is 00010, it can be determined that the last RU that the STA needs to feed back channel state information is the 25th 26-tone RU.
  • the RU that the STA needs to feed back channel state information is the 9th 26-tone RU-the 25th 26-tone RU.
  • the order number of the last RU that the STA needs to feed back channel state information determined according to the resource unit start index and the resource unit offset index is greater than 148, it can be determined that the last RU needs to feed back channel state information
  • One RU is the 148th RU.
  • the first RU of the required feedback channel state information indicated by the resource unit start index is the 142th RU among 148 26-tone RUs, and the resource unit offset index indicates that the offset is 8 26-tone RUs.
  • the last RU for which the STA needs to feed back channel state information is the 148th RU.
  • the degree of compression of the resource unit offset index can be adjusted by adjusting the basic granularity.
  • part of the bandwidth information subfield includes an RU indication index
  • the RU indication index includes a frequency domain indication part and an RU indication part
  • the frequency domain indication part is used to indicate the channel state information required by the station corresponding to the AID to be fed back.
  • the RU indication part is used to indicate the RU that needs to feed back channel state information.
  • the bandwidth is 320 MHz
  • 320 MHz is divided into 4 frequency domain ranges, which may also be referred to as 4 frequency domain fragments.
  • the four frequency domains correspond to the first 80MHz, the second 80MHz, the third 80MHz, and the fourth 80MHz in the order of frequency from low to high.
  • the number of bits in the frequency domain indication part may be 2 bits, and it indicates that the frequency domain range of the RU that the STA needs to feed back channel state information is one of the 4 frequency domain ranges.
  • the corresponding relationship between the frequency domain indication part and the indicated frequency domain range can be referred to Table 8.
  • Frequency domain indicator Frequency domain range 00 The first 80MHz 01 The second 80MHz 10 The third 80MHz 11 4th 80MHz
  • the RU indication part is 7 bits, and it is used to indicate that the RU required to feed back channel state information is one RU or a combination of multiple RUs in the frequency domain indicated by the frequency domain indication part. Refer to Table 9 for the relationship between the RU indication part and the indicated RU.
  • the RU indication part of each entry in the above table 9 is a decimal value, and in the partial bandwidth information subfield, the RU indication part of the RU indication index is a binary value corresponding to the decimal value in the above table 9.
  • the first 2 bits of the RU indicator index are the frequency domain indicator part, and the last 7 bits are the RU indicator part. If the RU indicator index is 000000001, 00 indicates the first 80MHz, 0000001 Indicate the second 26-tone RU in 80MHz, then 000000001 indicates that the RU that the station needs to feed back channel state information is the second 26-tone RU in the first 80MHz; if the RU indicator index is 111000010, 11 indicates the fourth 80MHz, 1000010 indicates the second 484-tone RU in 80MHz, then 111000010 indicates that the RU that the station needs to feedback channel state information is the second 484-tone RU in the fourth 80MHz.
  • the partial bandwidth information subfield includes a resource unit start index and a resource unit end index.
  • the resource unit start index is used to indicate the first RU that the station corresponding to the AID needs to feed back channel state information.
  • the resource unit end index is used to indicate the last RU that the station corresponding to the AID needs to feed back channel state information.
  • the resource unit start index and the resource unit end index are compressed, and the granularity of the RU indicated by the resource unit start index and the resource unit end index is increased. For example, increase the granularity from 26-tone RU to 2*26-tone RU or 4*26-tone RU.
  • the first RU indicated by the start index of the resource unit is (k 1 *n+c 1 )*26-tone RU, c 1 , k 1 are positive integers, n is a natural number, and the end of the resource unit end index indicates the last
  • An RU is (k 2 *m+c 2 )*26-tone RU, c 2 , k 2 are positive integers, m is a natural number, the start index of the resource unit indicates the first RU by indicating n, and the end index of the resource unit is passed
  • the indication m indicates the last RU, k 1 ⁇ 2 and/or k 2 ⁇ 2.
  • the bandwidth is 320 MHz
  • k 1 is 2
  • c 1 is 1.
  • the start index of the resource unit indicates the 1st, 3rd, 5th,..., 2n+1th, 147th 26-tone RU, n ⁇ 73.
  • the granularity of the first RU indicated by the start index of the resource unit is 2*26-tone RU.
  • the start index of the resource unit indicates 74 situations in total and requires 7 bits.
  • K 2 is 4, c 2 is 2, and the resource unit end index indicates the 2nd, 6th, ..., 4n+2th, and 150th 26-tone RU.
  • the granularity of the last RU indicated by the resource unit end index is 4*26-tone RU.
  • the resource unit end index indicates that 37 situations require 6 bits, and n ⁇ 37.
  • the RU indicated by the resource unit end index is the last RU corresponding to the bandwidth.
  • the bandwidth is 320 MHz
  • the resource unit start index indicates the 150th 26-tone RU
  • the actually indicated RU is the 148th 26-tone RU.
  • the degree of compression of part of the bandwidth information subfields can be adjusted by adjusting the value of either or both of k 1 or k 2.
  • the greater the degree of compression the smaller the number of bits required to indicate the same partial bandwidth information. In this way, the partial bandwidth information subfield can indicate the RUs in the larger bandwidth that need to feed back channel state information.
  • part of the bandwidth information subfield may indicate part of the bandwidth information in the manner in HE NDPA.
  • the number of bytes in the site information field is 4 bytes, which is consistent with the number of bytes in the HE NDPA frame.
  • the station information field of the EHT NDPA frame does not include the AIDs of HE STA, Ranging STA, and VHT STA, and disambiguation subfields are set in other locations that may be considered by HE STA, Ranging STA, or VHT STA to have AIDs, which can avoid HE STA, Ranging STA or VHT STA misread EHT NDPA frame.
  • the following describes the design solution of the column number subfield in the station information field when the number of columns indicated by the column number subfield in the NDPA frame is greater than 8.
  • This column number subfield design scheme is suitable for the case where the site information field is 6 bytes, and it is also suitable for the case where the site information field is 4 bytes.
  • the number of bits in the column number subfield can be increased to indicate more columns.
  • the number of bits in the column number subfield may be 4 bits.
  • the column number subfield can indicate the number of columns by way of the column number index. For the corresponding relationship between the number of columns index and the number of columns, please refer to Table 12.
  • the correspondence relationship between the column number index and the column number is not limited to the correspondence relationship shown in Table 12. In other embodiments, the correspondence relationship between the column number index and the column number can be set flexibly.
  • the design scheme of the column number subfield mentioned above can be implemented in combination with the design scheme of any site information field mentioned above, or it can be implemented separately.
  • the design solution of part of the bandwidth information subfield in the site information field can adopt any of the above-mentioned bandwidths corresponding to the NDPA frame greater than 160MHz.
  • the design plan of the column number subfield can refer to the design plan of the column number subfield when the number of columns indicated by the column number subfield is greater than 8.
  • part of the bandwidth information subfield indicates part of the bandwidth information according to the method in HE NDPA, and when the bandwidth is greater than 160MHz, according to the above-mentioned indication scheme of the partial bandwidth information subfield instruct.
  • the station information field in the EHT NDPA frame can also be any one of the foregoing embodiments of this application.
  • the station information field in the EHT NDPA frame adopts a uniform format.
  • the station information field in the EHT NDPA frame adopts a uniform format. In this way, the EHT STA can use a unified reading strategy to read all the station information fields in the EHT NDPA frame, which is more convenient for the EHT STA to read the EHT NDPA frame.
  • the embodiment of the present application also provides another site information field design solution.
  • the bandwidth is greater than 160 MHz
  • one site corresponds to two site information fields.
  • the NDPA frame includes two site information fields corresponding to the same site.
  • the two site information fields contain the AID of the same site.
  • This solution can be implemented in combination with any of the above-mentioned solutions indicating type information, or implemented separately.
  • the way of indicating the partial bandwidth information of the site is that the partial bandwidth information subfields in the two site information fields collectively indicate the first RU and the last RU of the channel state information that the STA corresponding to the AID needs to feedback. It can be understood that such a solution divides the part of the bandwidth information subfield corresponding to the STA corresponding to the AID into two parts, which are respectively transmitted in the two site information fields containing the AID.
  • the part of the bandwidth information subfield in the EHT NDPA frame may adopt the setting mode of the part of the bandwidth information subfield in the HE NDPA.
  • the EHT NDPA frame includes two site information fields containing the site’s AID, and the two site information fields cooperate to indicate part of the bandwidth information, so that each site can be added as needed The number of bits occupied by the corresponding site information field, instead of blindly increasing the number of bits of the site information field corresponding to all sites, thereby reducing overhead.
  • FIG. 9 is a schematic structural diagram of another NDPA frame provided by an embodiment of this application.
  • the start index of the resource unit in one of the site information field and the start index of the resource unit in the other site information field in the two site information fields indicate the channel state that the station corresponding to the same AID needs to feedback.
  • the first RU of the information, the resource unit end index in one site information field and the resource unit end index in the other site information field indicate the last RU of the channel state information that the same AID needs to feed back.
  • the number of bits of the resource unit start index in one site information field of the two site information fields is 7 bits, and the resource unit start index in the other site information field is 1 bit.
  • the 7-bit resource unit start index in one site information field and the 1-bit resource unit start index in the other site information field cooperate to indicate the first channel state information that the STA corresponding to the same AID needs to feed back. 1 RU.
  • the 7-bit resource unit start index in one site information field and the 1-bit resource unit start index in another site information field together form a complete resource unit start index.
  • the 1-bit resource unit start index in the other site information field may be the most significant bit (MSB) of the complete resource unit start index, and may also be referred to as the most significant bit.
  • a 1-bit resource unit end index in a site information field and a 1-bit resource unit end index in another site information field together form a complete resource unit end index.
  • the complete resource unit end index can indicate the first RU that the station needs to feed back channel state information.
  • the 1-bit resource unit end index in the other site information field may be the most important bit of the complete resource unit end index, and may also be called the highest bit.
  • the number of bits of the start index of the resource unit and the number of bits of the end index of the resource unit in the two site information fields are not limited to the above examples, and may also be other bit numbers.
  • FIG. 10 is a schematic structural diagram of another NDPA frame provided by an embodiment of the application.
  • one of the two site information fields contains the resource unit start index but not the resource unit end index
  • the other site information field contains the resource unit end index. It does not include the start index of the resource unit.
  • the resource unit start index in the site information field indicates the first RU that the STA corresponding to the two site information fields needs to feed back channel state information
  • the resource unit end index in the other site information field indicates the two sites The last RU that the STA corresponding to the information field needs to feed back channel state information.
  • the number of bits in some of the bandwidth information subfields in the two site information words is only 8 bits, so that the number of bytes of the site information field can be controlled within 4 bytes, and It can support indicating RUs in 320MHz that need to feed back channel state information.
  • the number of bits in part of the bandwidth information subfield in each site information field is reduced, so that the number of bits in the column number subfield can be increased, and thus more columns can be indicated.
  • the way of indicating the number of columns can be that the column number subfield in one site information field of the two site information fields and the column number subfield in the other site information field indicate the same
  • the number of bits in the column number subfield in one site information field is 3 bits
  • the number of bits in the column number subfield in another site information field is 1 bit.
  • the column number subfield in one site information field and the column number subfield in the other site information field form a complete column number subfield.
  • the complete column number subfield can accurately indicate the number of columns.
  • the 1-bit column number subfield in the other station information field may be the most significant bit (MSB) or the most significant bit of the complete column number subfield.
  • FIG. 11 is a schematic structural diagram of another NDPA frame provided by an embodiment of the application.
  • one of the two site information fields includes a part of the bandwidth information subfield but not the column number subfield, and the other site information field includes the column number subfield, and Does not include some bandwidth information subfields.
  • the station when the frequency of part of the bandwidth for which the station needs to feed back channel state information is not within the first 160 MHz of the entire bandwidth in the order of frequency from low to high, the station will correspond to the above two station information fields.
  • the two site information fields contain the AID of the site, that is, the AIDs contained in the two site information are the same.
  • the STA corresponds to only one station information field, which can avoid the unnecessary increase of the station information field and increase the overhead.
  • the beamforming report includes category information, EHT action information, EHT multiple input multiple output (MIMO) control information, compressed beamforming report and multi-user exclusive beamforming report (MU exclusive beamforming report).
  • EHT action information EHT multiple input multiple output (MIMO) control information
  • compressed beamforming report MU exclusive beamforming report
  • the MIMO control field in the beamforming report is EHT MIMO control information carried in the EHT MIMO control field.
  • EHT MIMO control fields include: column number subfield, row number subfield, bandwidth (BW) subfield, grouping subfield, codebook information subfield, feedback type subfield, remaining feedback fragmentation subfield, first feedback fragmentation subfield , Resource unit start index, resource unit end index, probe dialog token subfield, forbidden subchannel bitmap existence/length subfield and forbidden subchannel bitmap.
  • the column number subfield is used to indicate the number of columns to be fed back.
  • the number of rows subfield is used to indicate the number of rows of feedback.
  • the channel width subfield is used to indicate the bandwidth of the channel.
  • the grouping subfield is a grouping bitmap, which is used to indicate the grouping of subcarriers. The channel state information of the subcarriers in the same group is fed back uniformly.
  • the feedback type subfield is used to indicate the type of feedback.
  • the remaining feedback fragments are used to indicate the fragments that have not yet been fed back, and the first feedback fragment subfield is used to indicate whether it is the first feedback fragment.
  • the resource unit start index is used to indicate the first RU that the station needs to feed back channel state information
  • the resource unit end index is used to indicate the last RU that the station needs to feed back channel state information.
  • the forbidden subchannel bitmap existence/length subfield indicates whether there is a forbidden subchannel bitmap, and when there is a forbidden subchannel bitmap, it indicates the length of the forbidden subchannel bitmap. For example, when the forbidden subchannel bitmap existence/length subfield indicates 0, it can be understood as indicating that there is no forbidden subchannel bitmap.
  • each bit of the prohibited subchannel bitmap is used to indicate 20MHz preamble puncturing information.
  • the description of the prohibited subchannel bitmap in the EHT MIMO control field can refer to the related description of the prohibited subchannel bitmap in the NDPA frame in the foregoing embodiment.
  • the EHT MIMO control field of the beamforming report also includes the prohibited subchannel bitmap, which can avoid misreading of the EHT MIMO control field. Any one of the foregoing solutions for compressing the number of bits in the subfield of partial bandwidth information may be used to compress the resource unit start index and resource unit end index in the EHT MIMO control field.
  • the forbidden subchannel bitmap existence/length subfield may indicate the length of the forbidden subchannel bitmap by indicating the bandwidth or the number of bits.
  • the forbidden subchannel bitmap existence/length subfield can indicate that the bandwidth is 320MHz, so that it can indicate that the length of the forbidden subchannel bitmap is 16 bits, or the forbidden subchannel bitmap existence/length subfield can indicate that the bandwidth is 240MHz.
  • the indication method of the forbidden subchannel bitmap existence/length subfield and the indicated length are not limited to the above examples. In other embodiments, the forbidden subchannel bitmap existence/length subfield can be indicated in other ways, or Indicates other lengths.
  • the network device receiving the EHT MIMO control field can accurately receive the EHT MIMO control field according to the forbidden subchannel bitmap existence/length subfield.
  • the above-mentioned NDPA frame may be implemented by a trigger frame.
  • the NDPA frame in step 502 may be a trigger frame, and the trigger frame includes the content of the NDPA frame in any of the above-mentioned embodiments of the present application.
  • FIG. 13 is a schematic diagram of the structure of a trigger frame.
  • the trigger frame includes a trigger frame type field, which indicates that the trigger frame is an NDPA trigger frame.
  • the trigger frame also includes a bandwidth field, a probe dialog token, and an NDPA frame type field.
  • the type information is carried in the NDPA frame type field and is used to indicate the variant of the NDPA frame.
  • the design solution of related content in the site information field is applicable to the site information field in the trigger frame, and will not be repeated here.
  • the station information field in the trigger frame may not include the disambiguation field. Because, in 802.11ax and previous standard protocols, NDPA frames are not sent through trigger frames. Corresponding HE STAs and STAs (such as VHT STAs) that are compliant with standards before 802.11ax will not receive NDPA through trigger frames. The scheme of sending the NDPA frame by triggering the frame does not need to consider the problem of misreading by devices that are adapted to 802.11ax and previous standard protocols, and there is no need to set the disambiguation field.
  • FIG. 14 is a schematic diagram of the feedback process of the beamforming report.
  • the NDPA frame is sent through the trigger frame.
  • Bfee includes multiple stations (STA1, ST2, and STA3 in Figure 14).
  • the AP first sends an NDPA frame in the form of a trigger frame, and then sends an NDP after the SIFS.
  • the trigger frame can trigger multiple stations to perform uplink transmission at the same time.
  • STA1, ST2, and STA3 can feed back beamforming reports at the same time, which can improve the efficiency of channel detection.
  • the embodiment of the present application also provides another partial bandwidth information indication solution.
  • the site information includes an RU indication index.
  • the RU indication index indicates the RU corresponding to part or all of the bandwidth of the required channel state information to indicate the required channel state information.
  • the RU indication index can be understood as a partial bandwidth information field or a partial bandwidth information subfield.
  • the minimum granularity of RU indication index indication RU is 242-tone RU, so that it is not necessary to indicate a small RU, which helps to reduce the number of bits of RU indication index and reduce indication overhead.
  • the RU indication index indicates the size of the RU corresponding to part or all of the bandwidth of the required channel state information and the frequency position of the RU in the complete bandwidth.
  • the corresponding bandwidth is 20 MHz
  • 16 different RU indicators can be used to indicate different positions of the 242-tone RU in 320 MHz.
  • the 16 different RU indicator indexes are used for Indicate the 16 20MHz corresponding to 320MHz in the order of frequency from low to high.
  • the corresponding bandwidth is 40MHz, which can be indexed by 8 different RU indicators, indicating different positions of 484-tone RU in 320MHz.
  • the 8 different RU indicator indexes are used to indicate 320MHz.
  • 16 different RU indicators can be indexed to indicate different positions of 242+484-tone RU in 320MHz.
  • 320MHz is understood as the first 80MHz, the second 80MHz, the third 80MHz, and the fourth 80MHz in the order of frequency from low to high.
  • the index can be indicated by 4 different RUs, respectively indicating the position of the 242+484-tone RU in the first 80MHz, and another 4 different RUs can indicate the index, respectively indicating that the 242+484-tone RU is in the second 80MHz
  • the position in the middle is indicated by another 4 different RUs, respectively indicating the position of the 242+484-tone RU in the third 80MHz, and then by another 4 different RUs indicating the index, respectively indicating 242+484-tone
  • 4 different RU indication indexes can be used to indicate different positions of 996-tone RU in 320MHz.
  • the 4 different RU indication indexes are used to indicate 320MHz respectively, according to Four 80MHz corresponding to the frequency from low to high.
  • 484+996-tone RU For 484+996-tone RU, corresponding to 120MHz, it can be indexed by 4 different RU indicators, indicating the different positions of 484+996-tone RU in 160MHz, the lowest frequency in 320MHz, and another 4 different RUs. The index indicates the different positions of 484+996-tone RU in 160MHz, which is the highest frequency among 320MHz.
  • 6 different RU indicators can be indexed to indicate different positions of 2*996-tone RU in 320MHz. It can also further specify the location of the 2*996-tone RU, and only support 2*996-tone RU in the 160MHz with the lowest frequency in the 320MHz bandwidth and 2*996-tone RU in the 160MHz with the highest frequency, corresponding to only two Different RU indicates the index.
  • 3*996-tone RU corresponding to 240MHz, 4 different RU indicators can be indexed to indicate different positions of 3*996-tone RU in 320MHz.
  • this situation can be understood as indicating full bandwidth, which can be indicated by an RU indicator index.
  • the number of bits of the RU indication index may be, for example, but not limited to 6 bits or 7 bits.
  • the type of RU indicated by the RU indication index is not limited to the above-mentioned examples, and the RU indication index may also indicate other types of RUs and positions of RUs in the bandwidth.
  • the RU indication index may be 6 bits.
  • the RU indication index may be indicated according to Table 14.
  • the correspondence between the RU indication index and the indicated bandwidth/RU is arranged in ascending order of the RU.
  • the RU indication index is compared with the indicated bandwidth/RU.
  • the correspondence relationship is not limited to the correspondence relationship in the foregoing Table 14.
  • the correspondence relationship between the RU indication index and the indicated bandwidth/RU can be adjusted and transformed, as long as the corresponding bandwidth/RU can be obtained according to the RU indication index.
  • N*996-tone RU corresponding to N*80 MHz
  • 14 different RUs can be indexed to indicate different positions of N*996-tone RU in 320 MHz.
  • N 1, 2, 3.
  • the RU indication index indicating N*996-tone RU may include 4 bits for use as a bitmap.
  • Each of the 4 bits corresponds to one 80 MHz of 320 MHz. For example, if the bitmap is 1100, it indicates that 2*996-tone RU is located at the first 80MHz and the second 80MHz in 320MHz. If the bitmap is 0010, it indicates that 996-tone RU is located at the third of 320MHz. 80MHz.
  • the 4-bit bitmap is the last 4 bits of the RU indicator index.
  • this situation can be understood as indicating full bandwidth, which can be indicated by an RU indicator index.
  • the RU indicator index of 4*996-tone RU can be indicated in accordance with the above-mentioned indication method of RU indicator index corresponding to N*996-tone RU, which also includes a 4-bit bitmap.
  • the bitmap is 1111, indicating 4 *996-tone RU is located in the first 1-4 80MHz of 320MHz.
  • the RU indicator index indicating 4*996-tone RU can be used to indicate 4*996-tone RU, or it can be used to indicate full bandwidth (complete bandwidth).
  • the RU indication index may be 6 bits.
  • the RU indication index may be indicated according to Table 15-1.
  • the specific corresponding relationship between 100001-101110 indicating N*996-tone RU can be as shown in Table 16.
  • the last 4 bits of 100001-101110 specifically indicate N*996-tone RU, and the last 4 bits realize the role of bitmap.
  • the RU indicator index indicates the full bandwidth or the RU corresponding to the full bandwidth; for example, the bandwidth is 20MHz, 40MHz, 80MHz or 160MHz , 320 MHz, the RU indicator index indicates the full bandwidth or the RU corresponding to the full bandwidth (for example, the RU indicator index (such as 101111) is used in Table 15-1) to indicate the full bandwidth or 4*996-tone RU.
  • Another indication scheme is that when the bandwidth of the required feedback channel state information is the full bandwidth, and only the bandwidth is equal to the full bandwidth, for example, only when the bandwidth corresponding to the RU is 320MHz, and the bandwidth of the required feedback channel state information is the full bandwidth 320MHz.
  • the RU indicator index of the RU corresponding to the bandwidth is used for indication.
  • the RU indicator index that indicates the 242-tone RU where 20MHz is located can be used to indicate. For example, based on Table 15-1, one of 000000-001111 can be used for indication.
  • the RU indicator index indicating the 484-tone RU where 40MHz is located can be used to indicate. For example, based on Table 15-1, one of 010000-010111 can be used for indication.
  • the RU indicator index indicating the 996-tone RU where 80MHz is located can be used to indicate. For example, based on Table 15-1, one of 100001-101110 can be used for indication.
  • the RU indicator index of the 2*996-tone RU that indicates the 160MHz can be used to indicate. For example, based on Table 15-1, one of 100001-101110 can be used for indication.
  • the rows where the RU indicates indexes 100001-101110 and 101111 in Table 15-1 can be replaced with the following Table 15-2.
  • the correspondence relationship between the RU indication index and the indicated bandwidth/RU can be adjusted and transformed.
  • the number of bits of the RU indication index may also be 7 bits, which may support indicating more RU types.
  • 12 different RUs can be indexed to indicate different positions of 2*996+484-tone RU in 320MHz.
  • 240MHz with the lowest frequency in 320MHz corresponds to 6 different RU indication indexes, indicating different positions in 240MHz with the lowest frequency;
  • 240MHz with the highest frequency in 320MHz corresponds to another 6 different RU indications index.
  • 3*996+484-tone RU corresponding to 280MHz, 8 different RUs can be indexed to indicate different positions of 3*996+484-tone RU in 320MHz.
  • the RU indication index may be indicated according to Table 17.
  • the RU indication index may be indicated according to Table 18.
  • the RU indication indexes other than the RU indication index indicating N*996-tone RU are arranged in the order of RU from small to large.
  • the index indicating N*996-tone RU includes a 4-bit bitmap.
  • the number of bits of the RU indication index may also be 7 bits, which may support indicating more RU types.
  • 12 different RUs can be indexed to indicate different positions of 2*996+484-tone RU in 320MHz.
  • 3*996+484-tone RU corresponding to 280MHz, 8 different RUs can be indexed to indicate different positions of 3*996+484-tone RU in 320MHz.
  • the RU indication index may be indicated according to Table 19.
  • the index indicating N*996-tone RU includes a 4-bit bitmap.
  • the correspondence relationship between the RU indication index and the indicated bandwidth/RU can be adjusted and transformed.
  • the RU indication index may be indicated according to Table 20.
  • RU indication indexes other than the RU indication index indicating N*996-tone RU are arranged in the order of RU from small to large.
  • the index indicating N*996-tone RU includes a 4-bit bitmap.
  • the RU indication index is 5 bits, indicating a single RU. This can further reduce the indication overhead.
  • the RU indication index may be indicated according to Table 21.
  • the access point and the station may include a hardware structure and a software module, and the above functions are realized in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • One of the above-mentioned functions can be executed in a hardware structure, a software module, or a hardware structure plus a software module.
  • FIG. 15 is a schematic structural diagram of a transmission device according to an embodiment of the application.
  • the transmission device includes a processing unit 1501 and a sending unit 1502;
  • the processing unit 1501 is configured to generate an NDPA frame, the NDPA frame includes a site information field, the site information field includes an AID subfield indicating an associated identifier AID of a site; the site information field also includes a partial bandwidth information subfield and /Or the number of columns subfield; the partial bandwidth information subfield indicates the RU that the station needs to feed back channel state information in the bandwidth corresponding to the NDPA frame, and the number of columns subfield indicates the number of columns of the compressed beamforming feedback matrix;
  • the bandwidth corresponding to the NDPA frame is greater than 160 MHz, and the number of columns indicated by the column number subfield is greater than 8;
  • the sending unit 1502 is configured to send the NDPA frame.
  • the partial bandwidth information subfield of the NDPA frame indicates RUs that need to feed back channel state information in a bandwidth greater than 160 MHz.
  • the station information field can instruct the station to perform channel detection with a bandwidth greater than 160MHz, and feed back beamforming reports according to the channel detection results, so that a larger bandwidth can be used to transmit data and improve transmission efficiency.
  • the number of columns indicated by the column number subfield is greater than 8.
  • the station information field can instruct the station to perform channel detection with a bandwidth greater than 8 columns, and feed back beamforming reports according to the channel detection results, so that more streams can be used to transmit data and improve transmission efficiency.
  • the transmission device 1500 may be a communication device or an access point, or the transmission device 1500 may be deployed on a communication device or an access point.
  • the processing unit 1501 of the transmission device 1500 may be a processor, and the sending unit 1502 of the transmission device 1500 may be a transceiver.
  • NAPD frame transmission method is also applicable to the transmission device 1500, and will not be repeated here.
  • FIG. 16 is a schematic structural diagram of a transmission device according to an embodiment of the application.
  • the transmission device includes a processing unit 1601 and a sending unit 1602;
  • the processing unit 1601 is configured to generate an NDPA frame, the NDPA frame includes two site information fields, and the two site information fields include an AID subfield indicating the association identifier AID of the same site; the sending unit 1602 is used to send the NDPA frame.
  • the two site information fields meet at least one of the following:
  • Part of the bandwidth information subfields in the two station information fields together indicate the RU that the station needs to feed back channel state information, and the bandwidth corresponding to the NDPA frame is greater than 160 MHz; or
  • the column number subfield in the one site information field and the column number subfield in the other site information field indicate the number of columns of the compressed beamforming feedback matrix, and the number of columns indicated by the column number subfield is greater than 8.
  • Two RUs in the bandwidth greater than 160MHz that need to feed back channel state information in conjunction with the partial bandwidth information subfield in the station information field can instruct the station to perform channel detection of the bandwidth greater than 160MHz, and feed back beamforming reports based on the channel detection results , which can realize the use of larger bandwidth to transmit data and improve transmission efficiency.
  • the two column numbers subfields in the station information field indicate the number of columns greater than 8, which can instruct the station to perform channel detection with a bandwidth greater than 8, and feed back beamforming reports based on the channel detection results, thereby enabling more utilization Stream data to improve transmission efficiency.
  • the transmission device 1600 may be a communication device or an access point, or the transmission device 1600 may be deployed on a communication device or an access point.
  • the processing unit 1601 of the transmission device 1600 may be a processor, and the sending unit 1602 of the transmission device 1600 may be a transceiver.
  • NAPD frame transmission method is also applicable to the transmission device 1600, and will not be repeated here.
  • FIG. 17 is a schematic structural diagram of a transmission device according to an embodiment of the application.
  • the transmission device includes a processing unit 1701 and a sending unit 1702;
  • the processing unit 1701 is configured to generate an NDPA frame.
  • the NDPA frame includes a probe dialogue token field, a special site information field, and a site information field;
  • the probe dialogue token field includes a frame category subfield, and the special site information field includes a frame subcategory Subfield, the type information is carried in the frame category subfield and the frame subcategory subfield;
  • the frame category subfield indicates that the NDPA frame is a non-HE NDPA frame and a non-Ranging NDPA frame, and the frame subfield
  • the category subfield indicates that the NDPA frame is an EHT NDPA frame;
  • the sending unit 1702 is used to send NDPA frames.
  • the combination of the frame type subfield and the frame subtype subfield indicates that the NDPA frame is an EHT NDPA frame.
  • the EHT NDPA frame can indicate the RU in the bandwidth larger than 160MHz that needs to feed back channel state information, to instruct the station to perform channel detection of the bandwidth larger than 160MHz, and feedback the beamforming report according to the channel detection result, so as to realize the use of larger bandwidth transmission Data, improve transmission efficiency.
  • the EHT NDPA frame can also indicate the number of columns greater than 8, to instruct the station to perform channel detection with a bandwidth greater than 8, and feed back beamforming reports according to the channel detection results, so that more streams can be used to transmit data and improve transmission efficient. Moreover, this does not need to define a new frame, and make full use of the remaining available types in the MAC frame to save resources.
  • the transmission device 1700 may be a communication device or an access point, or the transmission device 1700 may be deployed on a communication device or an access point.
  • the processing unit 1701 of the transmission device 1700 may be a processor, and the sending unit 1702 of the transmission device 1700 may be a transceiver.
  • NAPD frame transmission method is also applicable to the transmission apparatus 1700, and will not be repeated here.
  • FIG. 18 is a schematic structural diagram of a transmission device according to an embodiment of the application.
  • the transmission device includes a processing unit 1801 and a receiving unit 1802;
  • the receiving unit 1802 is configured to receive an NDPA frame, the NDPA frame includes a site information field, the site information field includes an AID subfield indicating an associated identifier AID of a site; the site information field also includes a partial bandwidth information subfield and /Or the number of columns subfield; the partial bandwidth information subfield indicates the RU that the station needs to feed back channel state information in the bandwidth corresponding to the NDPA frame, and the number of columns subfield indicates the number of columns of the compressed beamforming feedback matrix;
  • the bandwidth corresponding to the NDPA frame is greater than 160 MHz, and the number of columns indicated by the column number subfield is greater than 8;
  • the processing unit 1801 is configured to obtain an RU that needs to feedback channel state information from the NDPA frame.
  • the partial bandwidth information subfield of the NDPA frame indicates RUs that need to feed back channel state information in a bandwidth larger than 160 MHz.
  • the station information field can instruct the station to perform channel detection with a bandwidth greater than 160MHz, and feed back beamforming reports according to the channel detection results, so that a larger bandwidth can be used to transmit data and improve transmission efficiency.
  • the number of columns indicated by the column number subfield is greater than 8.
  • the station information field can instruct the station to perform channel detection with a bandwidth greater than 8 columns, and feed back beamforming reports according to the channel detection results, so that more streams can be used to transmit data and improve transmission efficiency.
  • the transmission device may be a communication device or a site, or the transmission device may be deployed on a communication device or a site.
  • the processing unit 1801 of the transmission device 1800 may be a processor, and the receiving unit 1802 of the transmission device 1800 may be a transceiver.
  • NAPD frame transmission method is also applicable to the transmission device 1800, and will not be repeated here.
  • FIG. 19 is a schematic structural diagram of a transmission device according to an embodiment of the application.
  • the transmission device includes a processing unit 1901 and a receiving unit 1902;
  • the receiving unit 1902 is configured to receive an NDPA frame, where the NDPA frame includes two site information fields, and the two site information fields include an AID subfield indicating an association identifier AID of the same site;
  • the two site information fields meet at least one of the following:
  • Part of the bandwidth information subfields in the two station information fields together indicate the RU that the station needs to feed back channel state information, and the bandwidth corresponding to the NDPA frame is greater than 160 MHz; or
  • the column number subfield in one site information field and the column number subfield in the other site information field of the two site information fields indicate the number of columns of the compressed beamforming feedback matrix, and the number of columns indicated by the column number subfield is greater than 8. ;
  • the processing unit 1901 is configured to obtain the RU and/or the number of columns of the compressed beamforming feedback matrix required to feed back channel state information from the NDPA frame.
  • Two RUs in the bandwidth greater than 160MHz that need to feed back channel state information in conjunction with the partial bandwidth information subfield in the station information field can instruct the station to perform channel detection of the bandwidth greater than 160MHz, and feed back beamforming reports based on the channel detection results , which can realize the use of larger bandwidth to transmit data and improve transmission efficiency.
  • the two column numbers subfields in the station information field indicate the number of columns greater than 8, which can instruct the station to perform channel detection with a bandwidth greater than 8, and feed back beamforming reports based on the channel detection results, thereby enabling more utilization Stream data to improve transmission efficiency.
  • the transmission device may be a communication device or a site, or the transmission device may be deployed on a communication device or a site.
  • the processing unit 1901 of the transmission device 1900 may be a processor, and the receiving unit 1902 of the transmission device 1900 may be a transceiver.
  • NAPD frame transmission method is also applicable to the transmission device 1900, and will not be repeated here.
  • FIG. 20 is a schematic structural diagram of a transmission device according to an embodiment of the application.
  • the transmission device includes a processing unit 2001 and a receiving unit 2002;
  • the receiving unit 2002 is configured to receive an NDPA frame.
  • the NDPA frame includes a probe dialogue token field, a special site information field, and a site information field;
  • the probe dialogue token field includes a frame category subfield, and the special site information field includes a frame subcategory Subfield;
  • the frame type subfield indicates that the NDPA frame is a non-HE NDPA frame and a non-Ranging NDPA frame, and the frame subtype subfield indicates that the NDPA frame is an EHT NDPA frame;
  • the processing unit 2001 is configured to obtain the frame type subfield and the frame subtype subfield from the NDPA frame to determine that the NDPA frame is an EHT NDPA frame.
  • the combination of the frame type subfield and the frame subtype subfield indicates that the NDPA frame is an EHT NDPA frame.
  • the EHT NDPA frame can indicate the RU in the bandwidth larger than 160MHz that needs to feed back channel state information, to instruct the station to perform channel detection of the bandwidth larger than 160MHz, and feedback the beamforming report according to the channel detection result, so as to realize the use of larger bandwidth transmission Data, improve transmission efficiency.
  • the EHT NDPA frame can also indicate the number of columns greater than 8, to instruct the station to perform channel detection with a bandwidth greater than 8, and feed back beamforming reports according to the channel detection results, so that more streams can be used to transmit data and improve transmission efficient. Moreover, this does not need to define a new frame, and make full use of the remaining available types in the MAC frame to save resources.
  • the transmission device may be a communication device or a site, or the transmission device may be deployed on a communication device or a site.
  • the processing unit 2001 of the transmission device 2000 may be a processor, and the receiving unit 2002 of the transmission device 2000 may be a transceiver.
  • NAPD frame transmission method is also applicable to the transmission device 2000, and will not be repeated here.
  • the embodiments of the present application also provide a computer-readable storage medium on which a computer program is stored, and the computer-readable storage medium implements the functions of any of the foregoing method embodiments when executed by a computer.
  • the embodiments of the present application also provide a computer program product, which, when executed by a computer, realizes the functions of any of the foregoing method embodiments.
  • the embodiment of the present application further provides a processor, configured to execute steps that can be executed by an access point in any of the foregoing method embodiments or for executing steps that can be executed by a station in any of the foregoing method embodiments.
  • the processes of sending the above information and receiving the above information in the above methods can be understood as the process of outputting the above information by the processor and the process of receiving the input information of the processor.
  • the processor when outputting the above-mentioned information, the processor outputs the above-mentioned information to the transceiver for transmission by the transceiver. Furthermore, after the above-mentioned information is output by the processor, other processing may be required before it reaches the transceiver.
  • the transceiver receives the above-mentioned information and inputs it into the processor. Furthermore, after the transceiver receives the above-mentioned information, the above-mentioned information may need to undergo other processing before being input to the processor.
  • the processor outputs and receives, inputs and other operations, instead of transmitting, sending, and receiving directly by the radio frequency circuit and antenna.
  • the foregoing processor may be a processor dedicated to executing these methods, or a processor that executes computer instructions in a memory to execute these methods, such as a general-purpose processor.
  • the above-mentioned memory may be a non-transitory memory, such as a read only memory (ROM), which may be integrated with the processor on the same chip, or may be separately arranged on different chips.
  • ROM read only memory
  • the present invention The embodiment does not limit the type of the memory and the setting mode of the memory and the processor.
  • the embodiments of the present application also provide a chip system, which includes a processor and an interface, and is used to support a communication transmission device to implement functions related to an access point or a station in any of the foregoing method embodiments, for example, to determine or process the foregoing At least one of data and information involved in the method.
  • the chip system further includes a memory, and the memory is used to store necessary information and data of the aforementioned communication device.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • this application provides a functional entity that is used to implement the above-mentioned NDPA frame transmission method.
  • the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed system, device, and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative, for example, 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 or 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 function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .
  • the modules in the device of the embodiment of the present application may be combined, divided, and deleted according to actual needs.

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Abstract

本申请提供了一种空数据分组声明NDPA帧的传输方法及相关装置。该方法包括：接入点生成NDPA帧，NDPA帧包括站点信息字段，站点信息字段包括指示一个站点的关联标识符AID的AID子字段；站点信息字段还包括部分带宽信息子字段；部分带宽信息子字段指示NDPA帧对应的带宽中，站点所需反馈信道状态信息的RU；NDPA帧对应的带宽大于160MHz；接入点发送NDPA帧。这样站点信息字段能指示站点进行大于160MHz的带宽的信道探测，能实现利用更大的带宽传输数据，提高传输效率。本申请实施例可以应用于支持IEEE 802.11下一代WiFi EHT协议，比如802.11be等802.11协议的无线局域网系统。

Description

空数据分组声明帧的传输方法及相关装置
本申请要求于2020年05月22日提交中国专利局、申请号为202010443487.6、申请名称为“空数据分组声明帧的传输方法及相关装置”以及2020年09月14日提交中国专利局、申请号为202010963022.3、申请名称为“空数据分组声明帧的传输方法及相关装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线局域网络技术领域，尤其涉及一种空数据分组声明帧的传输方法及相关装置。
背景技术
无线局域网(wireless local area network，WLAN)等无线系统中，接入点(access point,AP)和站点(STA)需要提前获取信道状态信息用于进行波束成型(beamforming，BF)、速率控制、资源分配等功能。在WLAN中，获取信道状态信息的流程被叫做信道探测。相关技术中，AP进行信道探测的过程中，AP先发送空数据分组声明(null data packet announcement,NDPA)帧通知需要进行信道探测的STA。然后，在隔短帧间距(short inter-frame Space,SIFS)之后，发送没有数据字段部分的空数据分组(null data packet，NDP)。STA则通过NDP进行信道估计，然后通过波束成型报告(beamforming report,BF Report)帧反馈信道状态信息(channel state information,CSI)。
802.11ax中，NDPA帧称为高效(high efficient，HE)NDPA帧。HE NDPA帧包括站点信息字段，站点信息字段包括站点关联标志(Association Identifier,AID)子字段，部分带宽信息(partial bandwidth information,Partial BW Info)子字段、反馈类型(feedback type)和分组数(Number of grouping)子字段和列数(Number of columns,Nc)子字段。部分带宽信息子字段，用于指示STA所需反馈信道状态信息的频域范围。部分带宽信息子字段包括资源单元(resource unit,RU)的起始索引(start index)到资源单元的结束索引(end index)，指示连续的一段RU，从而实现指示这段连续的RU对应的频域范围。然而，允许传输的带宽最大为160MHz。160MHz的带宽最多对应74个26个子载波的资源单元(26-tone RU)。RU起始索引和RU结束索引分别指示74个26-tone RU中的一个。
然而，随着WLAN技术的发展，下一代的Wi-Fi标准(比如802.11be或Wi-Fi 7)中，需要支持更大的带宽的传输，比如支持大于160MHz的带宽的传输。在数据传输之前，需要进行信道的探测。如何针对更大的带宽(比如带宽大于160MHz)的信道进行信道测量，从而获取信道状态信息，以支持更大带宽的数据传输，提高下一代Wi-Fi标准的传输速率是至关重要的。
发明内容
本申请实施例提供了一种NDPA帧的传输方法及相关装置，能够满足指示大于160MHz的带宽中的需要反馈信道状态信息的RU的需求。
第一方面，本申请实施方式提供一种NDPA帧的传输方法，包括：
接入点生成NDPA帧，所述NDPA帧包括站点信息字段，所述站点信息字段包括指示一个站点的关联标识符AID的AID子字段；所述站点信息字段还包括部分带宽信息子字段和/ 或列数子字段；所述部分带宽信息子字段指示所述NDPA帧对应的带宽中，所述站点所需反馈信道状态信息的资源单元(resource unit,RU)，所述列数子字段指示压缩波束成形反馈矩阵的列数；所述NDPA帧对应的带宽大于160MHz，所述列数子字段指示的列数大于8；
所述接入点发送所述NDPA帧。
第二方面，本申请实施方式提供一种NDPA帧的传输方法，包括：
站点接收NDPA帧，所述NDPA帧包括站点信息字段，所述站点信息字段包括指示一个站点的关联标识符AID的AID子字段；所述站点信息字段还包括部分带宽信息子字段或列数子字段；所述部分带宽信息子字段指示所述NDPA帧对应的带宽中，所述站点所需反馈信道状态信息的RU；所述NDPA帧对应的带宽大于160MHz，所述列数子字段指示的列数大于8；
所述站点从所述NDPA帧中获得所需反馈信道状态信息的RU。
第三方面，本申请实施方式还提供一种传输装置，包括处理单元和发送单元；
处理单元用于生成NDPA帧，所述NDPA帧包括站点信息字段，所述站点信息字段包括指示一个站点的关联标识符AID的AID子字段；所述站点信息字段还包括部分带宽信息子字段和/或列数子字段；所述部分带宽信息子字段指示所述NDPA帧对应的带宽中，所述站点所需反馈信道状态信息的资源单元(resource unit,RU)，所述列数子字段指示压缩波束成形反馈矩阵的列数；所述NDPA帧对应的带宽大于160MHz，所述列数子字段指示的列数大于8；
发送单元用于发送所述NDPA帧。
第四方面，本申请实施方式还提供一种传输装置，包括处理单元和接收单元；
接收单元用于接收NDPA帧，所述NDPA帧包括站点信息字段，所述站点信息字段包括指示一个站点的关联标识符AID的AID子字段；所述站点信息字段还包括部分带宽信息子字段和/或列数子字段；所述部分带宽信息子字段指示所述NDPA帧对应的带宽中，所述站点所需反馈信道状态信息的RU；所述NDPA帧对应的带宽大于160MHz，所述列数子字段指示的列数大于8；
处理单元用于从所述NDPA帧中获得所需反馈信道状态信息的RU。
本申请的技术方案，NDPA帧的部分带宽信息子字段指示大于160MHz的带宽中的需要反馈信道状态信息的RU。站点信息字段能够指示站点进行大于160MHz的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更大的带宽传输数据，提高传输效率。列数子字段指示的列数大于8。站点信息字段能够指示站点进行列数大于8的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更多的流数传输数据，提高传输效率。
和/或流数大于8的信道探测，并根据信道探测结果反馈波束成形报告。从而能够实现利用更大的带宽和/或更多的流数传输数据，提高传输效率。
在某些实施方式中，所述NDPA帧包括类型信息，所述类型信息指示所述NDPA帧为极高吞吐率EHT NDPA帧。
这样类型信息能够指示802.11be或802.11be之后的其他标准的NDPA帧变种。例如，该NDPA帧的变种可为802.11be标准的极高吞吐率(extremely high throughput，EHT)NDPA帧。EHT NDPA帧能够指示大于160MHz的带宽中的需要反馈信道状态信息的RU，以指示站点进行大于160MHz的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更大的带宽传输数据，提高传输效率。EHT NDPA帧还可以指示大于8的列数，以指示站点进行列数大于8的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能 够实现利用更多的流数传输数据，提高传输效率。
应理解，本申请实施方式的提供的NDPA帧，也适用于带宽小于等于160MHz，或指示的列数小于等于8的情况。
在某些实施方式中，所述NDPA帧还包括探测对话令牌字段和特殊站点信息字段，所述探测对话令牌字段包括帧类别子字段，所述特殊站点信息字段包括帧子类别子字段，所述类型信息承载在所述帧类别子字段和所述帧子类别子字段；所述帧类别子字段指示所述NDPA帧为非高吞吐率(high throughput,HE)NDPA帧及非测距(Ranging)NDPA帧，所述帧子类别子字段指示所述NDPA帧为EHT NDPA帧。
如此，不支持EHT NDPA帧的HE STA或Ranging STA会根据探测对话令牌字段中的帧类别子字段，将该EHT NDPA帧识别为VHT NDPA帧，按照VHT NDPA帧的格式读取该NDPA帧。该EHT NDPA帧的站点信息字段中不包含该HE STA或Ranging STA的AID。接收到该EHT NDPA帧的HE STA或Ranging STA，会识别出站点信息字段中的AID与自己的AID不匹配，也就不会根据该NDPA帧进行反馈。这样可以避免HE STA或Ranging STA误读该EHT NDPA帧。而支持EHT NDPA帧的EHT STA能够根据帧子类别子字段，确定是否为EHT NDPA帧，并在帧子类别子字段指示为EHT NDPA帧的情况下，按照EHT NDPA帧的结构，读取该NDPA帧中的部分带宽信息子字段和列数子字段，从而能够准确地获得所需反馈信道状态信息的部分带宽信息和/或需要反馈的列数。
应理解，本申请中的HE STA指不支持HE NDPA帧之后的NDPA帧变种的HE STA。本申请实施例中的Ranging STA为不支持Ranging NDPA帧之后的NDPA帧变种的老版本的Ranging STA。
下面提供一些部分带宽信息子字段的实施方式。
在一些实施方式中，所述部分带宽信息子字段包括：资源单元起始索引和资源单元偏移量索引，所述资源单元起始索引用于指示所述站点所需反馈信道状态信息的第1个RU，所述资源单元偏移量索引指示所述站点所需反馈信道状态信息的最后一个RU相对于所述第1个RU的偏移量。如此，站点能够根据部分带宽信息子字段指示的偏移量和第1个RU，确定所需反馈信道状态信息的最后1个RU。这样能够压缩资源单元偏移量索引的比特数，从而能够压缩指示相同的部分带宽信息时，部分带宽信息子字段所需的比特数，实现在不增加部分带宽信息子字段的比特数的情况下，支持指示更大的带宽中的需要反馈信道状态信息的RU。
本申请中，资源单元起始索引的比特数为8比特，所述资源单元偏移量索引的比特数小于或等于5比特。如此，相比较于HE NDPA中14比特的部分带宽信息子字段，本申请的方案能够减少部分带宽信息子字段的比特数，从而能够将节省的比特数，增加到列数子字段中，增加列数子字段的比特数，以使得列数子字段指示大于8的列数。
在一种具体的实现方式中，所述资源单元偏移量索引通过指示所述偏移量相对于基本粒度的倍数，指示所述最后一个RU相对于所述第1个RU的偏移量。或者说，资源单元偏移量索引通过指示偏移量除以基本粒度得到的数值，指示偏移量。通过数学表达式表达可以为N＝偏移量/基本粒度。资源单元偏移量索引可通过指示N指示偏移量。N为正整数。这样能够更加有效的压缩资源单元偏移量索引，从而有助于支持指示更大的带宽中的需要反馈信道状态信息的RU，也有助于使得列数子字段指示更多的列数。
可通过调节基本粒度，调节资源单元偏移量索引的压缩程度。基本粒度越大，压缩程度越大。压缩程度越大，指示相同的偏移量所需的比特数越少，信令开销更小，这样部分带宽 信息子字段就能支持指示更大的带宽中的需要反馈信道状态信息的RU。可选的，基本粒度为8个26-tone RU。
在另一些实施方式中，所述部分带宽信息子字段包括RU指示索引，所述RU指示索引包括频域指示部分和RU指示部分，所述频域指示部分用于指示所述站点所需反馈信道状态信息的RU所在的频域范围，所述RU指示部分用于指示所述所需反馈信道状态信息的RU。所需反馈信道状态信息的RU可以为一个RU，也可以为多个RU的组合。这样，部分带宽信息子字段指示相同的带宽中的部分带宽信息，所需的比特数更少，信令开销更小，从而能够支持指示更大的带宽中的需要反馈信道状态信息的RU，也有助于使得列数子字段指示更多的列数。
在一种具体的实现方式中，所述RU指示索引的比特数为9比特。其中，频域指示部分的比特数为2比特，RU指示部分的比特数为7比特。如此，合理分配频域指示部分的比特数和RU指示部分的比特数，能够利用更少的比特数指示更大的带宽中的需要反馈信道状态信息的RU。
在另一些实施方式中，所述部分带宽信息子字段包括RU指示索引，所述RU指示索引指示所述站点所需反馈信道状态信息的部分或全部带宽对应的RU以及所述RU在完整的带宽中的频率位置。
具体地，RU指示索引指示RU的最小粒度为242-tone RU，这样不必指示小RU，从而有助于减少RU指示索引的比特数，减少指示开销。
在一个实施例中，所需反馈信道状态信息的部分带宽为N*80MHz，所需反馈信道状态信息的部分带宽对应的RU为N*996-tone RU，N＝1，2，3或4，RU指示索引包括4比特的比特位图，所述比特位图的每一比特对应一个80MHz，该比特位图中的每一比特用于指示该比特对应的80MHz是否为所需反馈信道状态信息的部分带宽。
在另一个实施例中，所需反馈信道状态信息的带宽为完整的带宽，RU指示索引为用于指示完整的带宽的第一索引。可选的，该完整的带宽为20MHz、40MHz、80MHz、160MHz或320MHz中的一个。
可选的，该RU指示索引为5比特、6比特或7比特。
具体地，RU指示索引为5比特时，RU指示索引仅指示单RU。
RU指示索引为6比特时，RU指示索引指示的RU可为242-tone RU、484-tone RU、484+996-tone RU、242+484-tone RU、996-tone RU、2*996-tone RU、3*996-tone RU或4*996-tone RU中的一个。
RU指示索引为7比特时，RU指示索引指示的RU可为242-tone RU、484-tone RU、484+996-tone RU、242+484-tone RU、996-tone RU、2*996-tone RU、2*996+484-tone RU、3*996-tone RU、3*996+484-tone RU或4*996-tone RU中的一个。
在又一些实施方式中，所述部分带宽信息子字段包括资源单元起始索引和资源单元结束索引，所述资源单元起始索引用于指示所述站点所需反馈信道状态信息的第1个RU，所述资源单元结束索引用于指示所述站点所需反馈信道状态信息的最后一个RU，所述第1个RU为(k 1*n+c 1)*26-tone RU，c 1，k 1为正整数，n为自然数，所述最后一个RU为(k 2*m+c 2)*26-tone RU，c 2，k 2为正整数，m为自然数，所述资源单元起始索引通过指示所述n指示所述第1个RU，所述资源单元结束索引通过指示所述m指示所述最后一个RU，k 1≥2和/或 k 2≥2。这样，能够通过调整k 1或k 2中的任一个或两个的值，调节部分带宽信息子字段的压缩程度。k 1越大，部分带宽信息子字段的压缩程度越大，k 2越大，部分带宽信息子字段的压缩程度越大。压缩程度越大，指示相同的部分带宽信息所需的比特数越少，这样部分带宽信息子字段就能支持指示更大的带宽中的需要反馈信道状态信息的RU。
基于上述任一实施方式，站点信息字段的字节数可为4字节。这样，能够在不增加站点信息字段的开销的前提下，指示大于160MHz的带宽中的需要反馈信道状态信息的RU和/或指示大于8的流数。这样站点信息字段能够指示站点进行大于160MHz的带宽和/或流数大于8的信道探测，并根据信道探测结果反馈波束成形报告。从而能够实现利用更大的带宽和/或更多的流数传输数据，提高传输效率。
而且，EHT NDPA帧的站点信息字段的字节数与HE NDPA帧的站点信息字段的字节数保持一致，相比于将EHT NDPA帧的站点信息字段的字节数设置为6字节的方案，4字节的站点信息字段能够避免HE STA误读。因为HE STA可能无法准确识别EHT NDPA帧的类型，会将EHT NDPA帧当做HE NDPA帧，并按照HE NDPA帧的结构读取EHT NDPA帧。若EHT NDPA帧的站点信息字段的字节数为6字节，则HE STA会将其中的第3个2字节的前11比特当做AID进行读取，若EHT NDPA帧的第3个2字节的前11比特刚好与HE STA的AID相符，则该HE STA会误认为该第3个2字节以及该第3个2字节之后的2字节为自己的站点信息字段。这样会因为位错读取而造成HE STA误读。
而本申请提供的4字节的站点信息字段与HE NDPA帧的站点信息字段的字节数保持一致。EHT NDPA帧的站点信息字段的每2字节的前11比特都是EHT STA的AID。即使HE STA将EHT NDPA帧当做HE NDPA帧，并按照HE NDPA帧的结构读取EHT NDPA帧，HE STA也会识别出每2字节的前11比特都与自己的AID不相符，从而能够有效地避免HE STA误读。
第五方面，本申请实施方式还提供一种NDPA帧的传输方法，包括：
接入点生成NDPA帧，所述NDPA帧包括至少两个站点信息字段，其中两个站点信息字段包括指示同一个站点的关联标识符AID的AID子字段；所述接入点发送所述NDPA帧。
其中，两个站点信息字段符合以下至少一种：
两个站点信息字段中的部分带宽信息子字段共同指示所述站点所需反馈信道状态信息的RU，所述NDPA帧对应的带宽大于160MHz；或
所述两个站点信息字段中的一个站点信息字段中的列数子字段和另一个站点信息字段中的列数子字段指示压缩波束成形反馈矩阵的列数，所述列数子字段指示的列数大于8；
接入点发送NDPA帧。
第六方面，本申请实施方式还提供一种NDPA帧的传输方法，包括：
站点接收NDPA帧，所述NDPA帧包括至少两个站点信息字段，其中两个站点信息字段包括指示同一个站点的关联标识符AID的AID子字段；所述接入点发送所述NDPA帧。
其中，两个站点信息字段符合以下至少一种：
两个站点信息字段中的部分带宽信息子字段共同指示所述站点所需反馈信道状态信息的RU，所述NDPA帧对应的带宽大于160MHz；或
所述两个站点信息字段中的一个站点信息字段中的列数子字段和另一个站点信息字段中的列数子字段指示压缩波束成形反馈矩阵的列数，所述列数子字段指示的列数大于8；
所述站点从所述NDPA帧中获得所需反馈信道状态信息的RU。
第七方面，本申请实施方式还提供一种传输装置，包括处理单元和发送单元，
处理单元用于生成NDPA帧，所述NDPA帧包括至少两个站点信息字段，其中两个站点信息字段包括指示同一个站点的关联标识符AID的AID子字段；所述接入点发送所述NDPA帧。
其中，两个站点信息字段符合以下至少一种：
两个站点信息字段中的部分带宽信息子字段共同指示所述站点所需反馈信道状态信息的RU，所述NDPA帧对应的带宽大于160MHz；或
所述两个站点信息字段中的一个站点信息字段中的列数子字段和另一个站点信息字段中的列数子字段指示压缩波束成形反馈矩阵的列数，所述列数子字段指示的列数大于8；
发送单元用于发送NDPA帧。
第八方面，本申请实施方式还提供一种传输装置，包括处理单元和接收单元；
接收单元用于接收NDPA帧，所述NDPA帧包括至少两个站点信息字段，其中两个站点信息字段包括指示同一个站点的关联标识符AID的AID子字段；所述接入点发送所述NDPA帧。
其中，两个站点信息字段符合以下至少一种：
两个站点信息字段中的部分带宽信息子字段共同指示所述站点所需反馈信道状态信息的RU，所述NDPA帧对应的带宽大于160MHz；或
所述两个站点信息字段中的一个站点信息字段中的列数子字段和另一个站点信息字段中的列数子字段指示压缩波束成形反馈矩阵的列数，所述列数子字段指示的列数大于8；
处理单元用于从所述NDPA帧中获得所需反馈信道状态信息的RU。
如此，能够在不改变NDPA帧原本包含的站点对应的一个站点信息字段的基础上，新增一个与站点对应的站点信息字段。两个与站点信息字段中的部分带宽信息子字段配合指示大于160MHz的带宽中的需要反馈信道状态信息的RU，能够指示站点进行大于160MHz的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更大的带宽传输数据，提高传输效率。两个与站点信息字段中的列数子字段配合指示大于8的列数，能够指示站点进行列数大于8的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更多的流数传输数据，提高传输效率。
关于两个站点信息字段指示站点所需反馈信道状态信息的RU的方式，在一种具体的实现方式中，所述两个站点信息字段中的一个站点信息字段中的资源单元起始索引和另一个站点信息字段中的资源单元起始索引指示所述NDPA帧对应的带宽中，所述站点所需反馈的信道状态信息的第1个RU，所述一个站点信息字段中的资源单元结束索引和所述另一个站点信息字段中的资源单元结束索引指示所述站点所需反馈的信道状态信息的最后一个RU；例如，一个站点信息字段中的资源单元起始索引的比特数为7比特，所述另一个站点信息字段中的资源单元起始索引为1比特，所述一个站点信息字段中的资源单元结束索引的比特数为1比特，所述另一个站点信息字段中的资源单元结束索引的比特数为1比特。
在另一种具体的实现方式中，两个站点信息字段中的一个站点信息字段中包括资源单元起始索引，用于指示所述站点所需反馈的信道状态信息的第1个RU，另一个站点信息字段包括资源单元结束索引，用于指示所述站点所需反馈的信道状态信息的最后一个RU。
可选的，两个站点信息字段中，一个站点信息字段中的列数子字段的比特数为3比特，所述另一个站点信息字段中的列数子字段的比特数为1比特。
在某些实施方式中，所述NDPA帧包括类型信息，所述类型信息指示所述NDPA帧为极高吞吐率EHT NDPA帧。
在某些实施方式中，所述NDPA帧还包括探测对话令牌字段和特殊站点信息字段，所述探测对话令牌字段包括帧类别子字段，所述特殊站点信息字段包括帧子类别子字段，所述类型信息承载在所述帧类别子字段和所述帧子类别子字段；所述帧类别子字段指示所述NDPA帧为非HE NDPA帧及非Ranging NDPA帧，所述帧子类别子字段指示所述NDPA帧为EHT NDPA帧。
该特殊站点信息字段还包括特殊AID，该特殊AID指示该站点信息字段为特殊站点信息字段，该特殊AID例如可以是但不限于是2047。
第九方面，本申请实施方式还提供一种NDPA帧的传输方法，包括：
接入点生成NDPA帧，NDPA帧包括探测对话令牌字段、特殊站点信息字段和站点信息字段；所述探测对话令牌字段包括帧类别子字段，所述特殊站点信息字段包括帧子类别子字段；所述帧类别子字段指示所述NDPA帧为非HE NDPA帧及非Ranging NDPA帧，所述帧子类别子字段指示所述NDPA帧为EHT NDPA帧；
接入点发送NDPA帧。
第十方面，本申请实施方式还提供一种NDPA帧的传输方法，包括：
站点接收NDPA帧，NDPA帧包括探测对话令牌字段、特殊站点信息字段和站点信息字段；所述探测对话令牌字段包括帧类别子字段，所述特殊站点信息字段包括帧子类别子字段；所述帧类别子字段指示所述NDPA帧为非HE NDPA帧及非Ranging NDPA帧，所述帧子类别子字段指示所述NDPA帧为EHT NDPA帧；
站点从NDPA帧中获得帧类别子字段和帧子类别子字段以确定所述NDPA帧的为EHT NDPA帧。
第十一方面，本申请实施方式还提供一种传输装置，包括处理单元和发送单元，
处理单元用于生成NDPA帧，NDPA帧包括探测对话令牌字段、特殊站点信息字段和站点信息字段；所述探测对话令牌字段包括帧类别子字段，所述特殊站点信息字段包括帧子类别子字段；所述帧类别子字段指示所述NDPA帧为非HE NDPA帧及非Ranging NDPA帧，所述帧子类别子字段指示所述NDPA帧为EHT NDPA帧；
发送单元用于发送NDPA帧。
第十二方面，本申请实施方式还提供一种传输装置，包括处理单元和接收单元，
接收单元用于接收NDPA帧，NDPA帧包括探测对话令牌字段、特殊站点信息字段和站点信息字段；所述探测对话令牌字段包括帧类别子字段，所述特殊站点信息字段包括帧子类别子字段；所述帧类别子字段指示所述NDPA帧为非HE NDPA帧及非Ranging NDPA帧，所述帧子类别子字段指示所述NDPA帧为EHT NDPA帧；
处理单元用于从NDPA帧中获得帧类别子字段和帧子类别子字段以确定所述NDPA帧的为EHT NDPA帧。
如此，帧类别子字段和帧子类别子字段结合指示NDPA帧为EHT NDPA帧。EHT NDPA帧能够指示大于160MHz的带宽中的需要反馈信道状态信息的RU，以指示站点进行大于160MHz的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更大的带宽传输数据，提高传输效率。EHT NDPA帧还可以指示大于8的列数，以指示站点进行列数大于8的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利 用更多的流数传输数据，提高传输效率。而且，这样并不需要定义一种新的帧，充分利用MAC帧中剩余可用的类型，节约资源。
第十三方面，本申请实施方式还提供一种通信装置，该通信装置可包括：处理器、收发器，可选的还包括存储器，当所述处理器执行所述存储器中的计算机程序或指令时，使得上述第一方面、第二方面、第五方面、第六方面、第九方面或第十方面的任一实施方式的方法被执行。
第十四方面，本申请实施方式还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机指令，所述计算机指令指示通信设备执行上述第一方面、第二方面、第五方面、第六方面、第九方面或第十方面的任一实施方式的方法。
第十五方面，本申请实施方式还提供一种计算机程序产品，所述计算机程序产品包括计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行上述第一方面、第二方面、第五方面、第六方面、第九方面或第十方面的任一实施方式的方法。
第十六方面，本申请还提供一种处理器，用于执行上述第一方面、第二方面、第五方面、第六方面、第九方面或第十方面的任一种方法。在执行这些方法的过程中，上述方法中有关发送上述信息和接收上述信息的过程，可以理解为由处理器输出上述信息的过程，以及处理器接收输入的上述信息过程。具体来说，在输出上述信息时，处理器将该上述信息输出给收发器，以便由收发器进行发射。更进一步的，该上述信息在由处理器输出之后，还可能需要进行其他的处理，然后才到达收发器。类似的，处理器接收输入的上述信息时，收发器接收该上述信息，并将其输入处理器。更进一步的，在收发器收到该上述信息之后，该上述信息可能需要进行其他的处理，然后才输入处理器。
如此一来，对于处理器所涉及的发射、发送和接收等操作，如果没有特殊说明，或者，如果未与其在相关描述中的实际作用或者内在逻辑相抵触，则均可以更加一般性的理解为处理器输出和接收、输入等操作，而不是直接由射频电路和天线所进行的发射、发送和接收操作。
在具体实现过程中，上述处理器可以是专门用于执行这些方法的处理器，也可以是执行存储器中的计算机指令来执行这些方法的处理器，例如通用处理器。上述存储器可以为非瞬时性(non-transitory)存储器，例如只读存储器(read only memory，ROM)，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本发明实施例对存储器的类型以及存储器与处理器的设置方式不做限定。
第十七方面，本申请提供了一种芯片系统，该芯片系统包括处理器和接口，用于支持通信传输设备实现第一方面～第四方面任一方面的方法中所涉及的功能，例如，确定或处理上述方法中所涉及的数据和信息中的至少一种。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存前述通信装置的必要的信息和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十八方面，本申请提供了一种功能实体，该功能实体用于实现上述第一方面、第二方面、第五方面、第六方面、第九方面或第十方面所述的方法。
附图说明
图1为本申请实施例涉及的通信系统的网络架构示意图；
图2为本申请实施例涉及的通信装置的结构示意图；
图3为本申请实施例提供的一种芯片的结构示意图；
图4A为本申请涉及的VHT NDPA帧的结构示意图；
图4B为本申请涉及的HE NDPA帧的结构示意图；
图5为本申请实施例提供的NDPA帧的传输方法的流程示意图；
图6为本申请实施例提供的NDPA帧的结构示意图；
图7为本申请实施例提供的站点信息字段的结构示意图；
图8为本申请实施例提供的另一站点信息字段的结构示意图；
图9为本申请实施例提供的另一NDPA帧的结构示意图；
图10为本申请实施例提供的又一NDPA帧的结构示意图；
图11为本申请实施例提供的再一NDPA帧的结构示意图；
图12为本申请实施例提供的EHT MIMO控制字段的结构示意图；
图13为本申请实施例提供的触发帧的结构示意图；
图14为波束成形报告的反馈过程示意图；
图15为本申请实施例提供的传输装置的模块示意图；
图16为本申请另一实施例的传输装置的模块示意图；
图17为本申请又一实施例的传输装置的模块示意图；
图18为本申请再一实施例的传输装置的模块示意图；
图19为本申请另又一实施例的传输装置的模块示意图；
图20为本申请再又一实施例的传输装置的模块示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例提供一种应用于无线通信系统的NDPA的传输方法。该无线通信系统可以为无线局域网(Wireless local area network，WLAN)或蜂窝网，该方法可以由无线通信系统中的通信设备或通信设备中的芯片或处理器实现。在无线局域网中，该通信设备支持采用IEEE 802.11系列协议进行通信，IEEE 802.11系列协议包括：802.11be，802.11ax，或802.11a/b/g/n/ac。
以图1为例阐述本申请的NDPA的传输方法可适用的网络结构。图1是本申请实施例提供的网络结构的示意图，该网络结构可以为无线局域网，该网络结构可包括一个或多个接入点(access point，AP)类的站点和一个或多个非接入点类的站点(none access point station，non-AP STA)。为便于描述，本文将接入点类型的站点称为接入点(AP)，非接入点类的站点称为站点(STA)。AP例如为图1中的AP1和AP2，STA例如为图1中的STA1和STA2。
其中，接入点可以为终端设备(如手机)进入有线(或无线)网络的接入点，主要部署于家庭、大楼内部以及园区内部，典型覆盖半径为几十米至上百米，当然，也可以部署于户外。接入点相当于一个连接有线网和无线网的桥梁，主要作用是将各个无线网络客户端连接到一起，然后将无线网络接入以太网。具体的，接入点可以是带有无线保真(wreless-fidelity，WiFi)芯片的终端设备(如手机)或者网络设备(如路由器)。接入点可以为支持802.11be制式的设备。接入点也可以为支持802.11be、802.11ax、802.11ac、802.11n、802.11g、802.11b及802.11a等802.11家族的多种无线局域网(wireless local area networks，WLAN)制式的设备。本申请中的接入点可以是极高吞吐量(extramely high throughput,EHT)AP，还可以是适 用未来某代WiFi标准的接入点。
接入点可包括处理器和收发器，处理器用于对接入点的动作进行控制管理，收发器用于接收或发送信息。
站点可以为无线通讯芯片、无线传感器或无线通信终端等，也可称为用户。例如，站点可以为支持WiFi通讯功能的移动电话、支持WiFi通讯功能的平板电脑、支持WiFi通讯功能的机顶盒、支持WiFi通讯功能的智能电视、支持WiFi通讯功能的智能可穿戴设备、支持WiFi通讯功能的车载通信设备和支持WiFi通讯功能的计算机等等。可选地，站点可以支持802.11be制式。站点也可以支持802.11be、802.11ax、802.11ac、802.11n、802.11g、802.11b及802.11a等802.11家族的多种无线局域网(wireless local area networks，WLAN)制式。
站点可包括处理器和收发器，处理器用于对接入点的动作进行控制管理，收发器用于接收或发送信息。
本申请中的接入点可以是极高吞吐量(extramely high throughput,EHT)STA，还可以是适用未来某代WiFi标准的STA。
例如，接入点和站点可以是应用于车联网中的设备，物联网(IoT，internet of things)中的物联网节点、传感器等，智慧家居中的智能摄像头，智能遥控器，智能水表电表，以及智慧城市中的传感器等。
本申请实施例中的所涉及的接入点和站点又可以统称为通信装置，其可以包括硬件结构、软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能可以以硬件结构、软件模块、或者硬件结构加软件模块的方式来实现。
图2为本申请实施例提供的一种通信装置的结构示意图。如图2所示，该通信装置200可包括：处理器201、收发器205，可选的还包括存储器202。
所述收发器205可以称为收发单元、收发机、或收发电路等，用于实现收发功能。收发器205可以包括接收器和发送器，接收器可以称为接收机或接收电路等，用于实现接收功能；发送器可以称为发送机或发送电路等，用于实现发送功能。
存储器202中可存储计算机程序或软件代码或指令204，该计算机程序或软件代码或指令204还可称为固件。处理器201可通过运行其中的计算机程序或软件代码或指令203，或通过调用存储器202中存储的计算机程序或软件代码或指令204，对MAC层和PHY层进行控制，以实现本申请下述各实施例提供的NDPA的传输方法。其中，处理器201可以为中央处理器(central processing unit，CPU)，存储器202例如可以为只读存储器(read-only memory，ROM)，或为随机存取存储器(random access memory，RAM)。
本申请中描述的处理器201和收发器205可实现在集成电路(integrated circuit，IC)、模拟IC、射频集成电路RFIC、混合信号IC、专用集成电路(application specific integrated circuit，ASIC)、印刷电路板(printed circuit board，PCB)、电子设备等上。
上述通信装置200还可以包括天线206，该通信装置200所包括的各模块仅为示例说明，本申请不对此进行限制。
如前所述，以上实施例描述中的通信装置200可以是接入点或者站点，但本申请中描述的通信装置的范围并不限于此，而且通信装置的结构可以不受图2的限制。通信装置可以是独立的设备或者可以是较大设备的一部分。例如所述通信装置的实现形式可以是：
(1)独立的集成电路IC，或芯片，或，芯片系统或子系统；(2)具有一个或多个IC的集合，可选的，该IC集合也可以包括用于存储数据，指令的存储部件；(3)可嵌入在其 他设备内的模块；(4)接收机、智能终端、无线设备、手持机、移动单元、车载设备、云设备、人工智能设备等等；(5)其他等等。
对于通信装置的实现形式是芯片或芯片系统的情况，可参见图3所示的芯片的结构示意图。图3所示的芯片包括处理器301和接口302。其中，处理器301的数量可以是一个或多个，接口302的数量可以是多个。接口302用于信号的接收和发送。可选的，该芯片或芯片系统可以包括存储器303。存储器303中用于保存芯片或芯片系统必要的程序指令和数据。
本申请实施例并且不限制权利要求书的保护范围和适用性。本领域技术人员可以在不脱离本申请实施例范围的情况下对本申请涉及的元件的功能和部署进行适应性更改，或酌情省略、替代或添加各种过程或组件。
WLAN从802.11a/g标准开始，历经了多带标准，例如802.11n,802.11ac,到现在正在讨论中的802.11ax。NDPA帧在不同的标准中会存在不同的变种(variant)。
802.11ac为802.11ax的上一代标准。802.11ac标准下，NDPA帧的变种可称为非常高吞吐率(very high throughput，VHT)NDPA。如图4A所示，图4A为VHT NDPA帧的结构示意图。
如图4A所示，VHT NDPA帧包括帧控制(frame control)字段、时长字段、接收地址(Receiving Address,RA)字段、发送地址(Transmitting Address,TA)字段、探测对话令牌(Sounding Dialog Token)字段和一个或多个站点信息字段(STA information，STA Info)。其中帧控制字段中包括帧类型和子类型子字段指示该帧为NDPA帧。探测对话令牌字段用于索引信道探测的序号。RA字段以及TA字段，用于标识MAC帧的接收端和发送端。
站点信息字段包含指示关联标识(association identifier,AID)的AID子字段，反馈类型(feedback type)子字段和列数(number of columns,Nc)子字段。一个站点信息字段的字节数为2字节。
AID子字段指示该站点信息字段对应的站点的AID。反馈类型子字段指示反馈为单用户还是多用户反馈。列数(number of columns,Nc)子字段指示该站点所需反馈信道状态信息的列数，也可以理解指示为该站点所需反馈信道状态信息的空间流数。
802.11ax中，对应的NDPA帧的变种为高吞吐率(high throughput,HE)NDPA帧。如图4B所示，图4B为HE NDPA帧的结构示意图。HE NDPA帧包括帧控制字段、时长字段、RA字段、TA字段、探测对话令牌字段和一个或多个站点信息字段。
其中，探测对话令牌的字节数可以为1字节，也即探测对话令牌的比特数可以为8比特，分别为B0-B7。探测对话令牌字段中，包括指示1比特帧类别子字段。该帧类别子字段位于探测对话令牌的B1，用于指示NDPA帧是否为HE NDPA帧。0指示NDPA帧为非HE NDPA帧，1指示NDPA帧为HE NDPA帧。
站点信息字段包括AID子字段，部分带宽信息(partial BW Info)子字段、反馈类型和分组(feedback type and Ng)子字段，消歧(disambiguation)子字段、码本(codebook Size)尺寸子字段和列数(number of columns,Nc)子字段。一个站点字信息的字节数为4字节。
AID子字段和列数子字段与上述VHT NDPA中AID子字段和列数子字段的用途一致。
部分带宽信息子字段指示该AID对应的站点所需反馈信道状态信息的频域范围。
可将用于传输数据的带宽分为一个或多个资源单元(resource unit，RU)。RU的大小可 以是26-tone RU、52-tone RU、106-tone RU，242-tone、484-tone、996-tone等等。其中，tone表示子载波，例如，26-tone RU表示由26个子载波组成的RU。20MHz的频域资源可由一整个242个子载波组成的资源单元(242-tone RU)组成，也可以由9个26-tone RU组成。
上述部分带宽信息子字段通过指示一段连续的26-toneRU指示站点所需反馈信道状态信息的频域范围。也即，该部分带宽信息子字段指示该AID对应的STA所需反馈信道状态信息的RU，以实现指示站点所需反馈信道状态信息的部分带宽的频域范围。应理解，该部分带宽的频域范围属于NDPA帧对应的带宽。
部分带宽信息子字段包括资源单元起始索引和资源单元结束索引，通过资源单元起始索引和资源单元结束索引指示一段连续的RU。802.11ax最大带宽为160MHz，由74个26-tone RU组成。因此，RU的起始索引需要
Figure PCTCN2021093950-appb-000001
比特指示该AID对应的站点所需反馈信道状态信息的第1个RU，RU的结束索引需要7比特指示该站点所需反馈信道状态信息的最后一个RU。
Figure PCTCN2021093950-appb-000002
为向上取整。
反馈类型和Ng子字段，指示反馈为单用户反馈还是多用户反馈，以及指示Ng个子载波被分成一组。这样同一组的子载波统一反馈信道状态信息，有助于节省开销。
消歧子字段用于避免被VHT STA当做VHT NDPA帧误读。本申请中的VHT STA指支持802.11ac协议，且不支持VHT NDPA帧之后的NDPA帧变种的老版本的VHT STA。
码本尺寸(codebook size)子字段指示量化的精准度，不同的精准度对应不同的开销。
802.11ax中，站点最多有8根天线，支持的列数最多为8列，因此列数子字段需要
Figure PCTCN2021093950-appb-000003
比特指示列数为从1到8的某一个值。
在802.11az，即Ranging标准阶段，对应的NDPA帧的变种为Ranging NDPA帧。Ranging NDPA帧的结构与HE NDPA帧的结构基本相同，Ranging NDPA帧的结构可参阅图4B。
与HE NDPA帧不同的是，Ranging NDPA帧中的探测对话令牌字段中，帧类别子字段的比特数为2比特，该2比特为上述B0-B7中的B0和B1。其中1比特(B1)用于指示NDPA帧是否为HE NDPA帧，另一比特(B0)用于指示NDPA帧是否为Ranging NDPA帧。Ranging STA根据2比特的帧类别子字段，确定NDPA帧的变种。帧类别子字段具体的指示关系如下表1所示。
表1
Figure PCTCN2021093950-appb-000004
应理解，HE STA并不会读取帧类别子字段中，用于指示是否为Ranging NDPA帧的这一比特。本申请中的HE STA指支持802.11ax协议，且不支持HE NDPA帧之后的NDPA帧变 种的老版本的HE STA。本申请中的Ranging STA指支持802.11az协议，且不支持Ranging NDPA帧之后的NDPA帧变种的老版本的Ranging STA。
关于各代标准中，部分带宽信息子字段的指示方式，802.11ax最大带宽为160MHz，部分带宽信息子字段可通过74个26-tone RU进行指示。74个26-tone RU按照对应的频率由低至高的顺序，对应的序号值依次为0,1,2,3，……，73。
HE NDPA帧中，部分带宽信息子字段的指示方式是，部分带宽信息的资源单元起始索引指示74个26-tone RU其中一个，资源单元结束索引用于指示74个26-tone RU其中一个。具体的，资源单元起始索引通过指示26-tone RU的序号的值，指示74个26-tone RU其中一个；资源单元结束索引通过指示26-tone RU的序号的值，指示74个26-tone RU其中一个。
可以看出，上述方案中，部分带宽信息子字段中的RU的起始索引仅支持74个26-tone RU中的一个RU，RU的结束索引也仅支持74个26-tone RU中的一个RU。
然而，802.11be标准，能够支持的最大带宽为320MHz。例如，以26-tone RU为粒度进行指示，320MHz最多可对应148个26-tone RU，需要指示148种情况，显然，这种情况下，HE NDPA帧中的部分带宽信息子字段，无法满足802.11be标准下，指示更大的带宽中的需要反馈信道状态信息的RU的需求。
关于各代标准中，列数子字段指示列数的方式，802.11ax最大列数为8，HE NDPA帧中的3比特的列数子字段通过指示1-8中的数值指示列数。然而，正在讨论中的802.11be标准，需要指示的列数最大为16列，显然，HE NDPA帧中的列数子字段无法满足802.11be标准下，指示更多的列数的需求。
下面结合本申请实施例提供的NDPA帧的传输方法，阐述本申请的技术方案。本申请实施例中，NDPA帧中包括多种字段和子字段，应理解，本申请实施例并不限定NDPA帧中的各种字段和子字段的命名，在其他实施例中，也可以替换为其他名称。
请参阅图5，图5为本申请实施例的NDPA帧的传输方法的流程示意图。该方法包括以下步骤：
501、波束成形发起者(Beamformer，Bfer)生成NDPA帧；
NDPA帧包括一个或多个站点信息字段。站点信息字段包括指示AID的AID子字段、部分带宽信息子字段和/或列数子字段。部分带宽信息子字段指示NDPA帧对应的带宽所包含的RU中，AID对应的波束成形响应者(Beamformee，Bfee)所需反馈信道状态信息的RU。也可以理解为，部分带宽信息子字段指示Bfer要求反馈的RU。站点所需反馈信道状态信息的RU或Bfer要求反馈的RU可以为一个RU，也可以为多个RU的组合。
应理解，部分带宽信息子字段指示的RU为一段连续的RU，并不限于指示一段连续的26-tone RU，例如可指示一段连续的52-tone RU、一段连续的242-tone RU，还可以指示大小不同的连续的多个RU的组合。
本申请中，部分带宽信息子字段指示的RU，并不一定是实际的RU。RU与子载波是对应的。部分带宽信息子字段通过指示带宽中的RU，指示子载波的范围，从而指示Bfer要求反馈的部分带宽的频域范围。例如，将320MHz作为148个26-tone RU进行指示，并不是指320MHz的带宽包括148个26-tone RU。部分带宽信息子字段指示的RU仅用于指示相应的频域范围。
其中，NDPA帧对应的带宽大于160MHz，或者列数子字段指示的列数大于8，或者NDPA帧对应的带宽大于160MHz，且列数子字段指示的列数大于8。
NDPA帧对应的带宽可理解为信道探测的带宽。或者说，NDPA帧对应的带宽为AP在发送该NDPA帧之后，发送的NDP的带宽。
可以理解，站点信息字段可包括部分带宽信息子字段和列数子字段中的任一个，也可以包括部分带宽信息子字段和列数子字段。
本申请实施例的NDPA帧符合NDPA帧对应的带宽大于160MHz和列数子字段指示的列数大于8中的任一种；或者NDPA帧对应的带宽大于160MHz且列数子字段指示的列数大于8。
502、Bfer发送NDPA帧。
对应的，Bfee接收NDPA帧，从NDPA帧获得的相关信道探测的参数，例如，获得部分带宽信息和/或压缩波束成形反馈矩阵的列数。
Bfer可以为AP也可以为STA。Bfee可以为STA也可以为AP。
可选的，步骤502之后，波束成形响应者可以开始进行信道测量流程。该信道测量流程可以包括：
503、Bfer发送空数据分组(null data packet，NDP)；
应理解，Bfer在隔短帧间距(short inter-frame space,SIFS)之后，发送NDP。
对应的，Bfee在接收NDPA帧SIFS之后，根据从DNPA帧获得的相关信道探测的参数，接收NDP。
504、Bfee根据NDPA帧中的指示信息，通过NDP进行信道估计，获得信道状态信息，并根据信道状态信息形成波束成形报告；
具体的，Bfee根据NDPA帧中的站点信息字段中的AID子字段，确定AID子字段与自己的AID相符，Bfee确定自己需要进行信道探测。Bfee可根据该站点信息字段中的部分带宽信息子字段确定需要反馈信道状态信息的频率范围，然后通过NDP进行信道估计，获得站点需要反馈信道状态信息的频率范围的信道状态信息。或者，Bfee还可根据Nc确定压缩波束成形反馈矩阵的列数，压缩波束成形反馈矩阵为波束成形报告中的一部分，该压缩波束成形反馈矩阵承载有至少一部分信道状态信息。
505、Bfee发送波束成形报告。
可以理解，波束成形报告包括信道状态信息。
Bfer可以为AP也可以为STA。Bfee可以为STA也可以为AP。本申请实施例中，以Bfer为AP，Bfee为STA进行举例说明。应理解，本申请实施例的技术方案，也适用于Bfer为STA或者Bfee为AP的情况。
当然，信道测量流程不限于本申请实施例提出的503至505的方案，可选的，信道测量流程还可以是由其他波束成形发起者发送NDP帧，由波束成形响应者根据该NDP帧进行测量。
本申请实施例的技术方案，NDPA帧的部分带宽信息子字段指示大于160MHz的带宽中的需要反馈信道状态信息的RU，这样站点信息字段能够指示站点进行大于160MHz的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更大的带宽传输数据，提高传输效率。列数子字段指示的列数大于8。站点信息字段能够指示站点进行列数大于8的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更多的 流数传输数据，提高传输效率。
具体的，NDPA帧中包括类型信息，类型信息用于指示NDPA帧的变种。例如，类型信息指示NDPA帧为EHT NDPA帧。该类型信息承载在一个或多个站点信息字段之前的字段中。
这样，站点接收NDPA帧时，先从NDPA帧中获取类型信息，根据类型信息确定NDPA帧的变种，再根据NDPA帧的变种确定读取站点信息字段的读取策略。例如，站点为EHT STA，类型信息指示NDPA帧的变种为EHT NDPA帧。该EHT STA则按照EHT NDPA帧的站点信息字段的结构，读取站点信息字段。EHT STA获得包含有自身的AID的站点信息字段，并从站点信息字段获取相关信道探测的参数(例如大于160MHz的带宽中的需要反馈信道状态信息的RU和/或指示大于8的列数)。然后EHT STA根据相关信道探测的参数接收NDP，然后根据NDP获取信道状态信息并通过波束成形报告向接入点反馈信道状态信息。
可以看出，类型信息能够实现指示一种新的NDPA帧变种为EHT NDPA帧。EHT NDPA帧能够指示大于160MHz的带宽中的需要反馈信道状态信息的RU，以指示站点进行大于160MHz的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更大的带宽传输数据，提高传输效率。EHT NDPA帧还可以指示大于8的列数，以指示站点进行列数大于8的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更多的流数传输数据，提高传输效率。而且，这样并不需要定义一种新的帧，充分利用MAC帧中剩余可用的类型，节约资源。
应理解，若类型信息指示该NDPA帧为VHT NDPA帧、HE NDPA帧或Ranging NDPA帧，EHT STA也能够分别按照VHT NDPA帧、HE NDPA帧或Ranging NDPA帧对应的格式读取该NDPA帧。
下面详细介绍本申请实施例提供的指示类型信息的方案。本申请实施例的指示类型信息的方案，不局限于用于指示NDPA帧的变种为EHT NDPA帧的场景，也适用于指示NDPA帧的变种为802.11be之后的标准所对应的新的NDPA帧的变种场景。
NDPA帧还包括探测对话令牌，探测对话令牌包括帧类别指示字段。
如表2所示，本申请提供的第1种指示类型信息的方案中，探测对话令牌字段中包括2比特的帧类别指示字段。帧类别子字段的2比特的值均为1，指示新的NDPA帧变种。该新的变种例如可以是802.11be对应的EHT NDPA帧，也可以是802.11be之后的标准所对应的NDPA帧。本申请实施例中，以AP发送的NDPA帧的变种为EHT NDPA帧，探测对话令牌字段中的帧类别子字段指示NDPA帧的变种为EHT NDPA帧为例进行说明。
表2
Figure PCTCN2021093950-appb-000005
可以理解，该方案中，上述类型信息承载在帧类别子字段。这样可以实现定义一种新的NDPA帧变种为EHT NDPA帧，而且不需要改变现有的帧类别子字段的值与所指示的NDPA 帧的变种的对应关系。
EHT STA从AP接收NDPA帧，并通过读取NDPA帧的2比特帧类别子字段，确定NDPA帧的变种。例如，帧类别子字段指示NDPA帧的变种为EHT NDPA帧。EHT STA根据该特帧类别子字段确定该NDPA帧为EHT NDPA帧。EHT STA可按照EHT NDPA帧的格式读取EHT NDPA帧中的站点信息字段。这样EHT NDPA帧能够指示大于160MHz的带宽中的需要反馈信道状态信息的RU，使得站点能够进行大于160MHz的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更大的带宽传输数据，提高传输效率。EHT NDPA帧还可以指示大于8的列数，使得站点能够进行列数大于8的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更多的流数传输数据，提高传输效率。
应理解，本申请实施例中，探测对话令牌字段中的帧类别子字段指示NDPA帧的变种为EHT NDPA帧。其他实施例中，探测对话令牌字段中的帧类别子字段也可指示NDPA帧的变种为VHT NDPA帧、HE NDPA帧或Ranging NDPA帧。若帧类别子字段指示该NDPA帧为VHT NDPA帧、HE NDPA帧或Ranging NDPA帧，EHT STA也能够分别按照VHT NDPA帧、HE NDPA帧或Ranging NDPA帧对应的格式读取该NDPA帧。
如表3所示，本申请提供的第2种指示类型信息的方案中，将上述用于指示Ranging NDPA帧的条目与上述用于指示EHT NDPA帧的条目交换。帧类别子字段中，指示是否为Ranging NDPA帧的1比特的值为1且指示是否为HE NDPA帧的1比特的值为0时，指示的NDPA帧的变种为EHT NDPA帧；指示Ranging NDPA帧的1比特的值为1且指示是否为HE NDPA帧的1比特的值为1时，指示的NDPA帧的变种为Ranging NDPA帧。这样也可以实现定义一种新的NDPA帧变种为EHT NDPA帧。探测对话令牌字段中的帧类别子字段能够指示帧的变种类型为EHT NDPA。EHT NDPA帧能够指示大于160MHz的带宽中的需要反馈信道状态信息的RU，以指示站点进行大于160MHz的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更大的带宽传输数据，提高传输效率。EHT NDPA帧还可以指示大于8的列数，以指示站点进行列数大于8的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更多的流数传输数据，提高传输效率。
表3
Figure PCTCN2021093950-appb-000006
EHT NDPA帧中的每个站点信息字段的第16n+12个比特(例如第28比特、第44比特)为消歧子字段，n为正整数。站点信息字段的第1个比特对应该站点信息字段的B0。这样，表3对应的方案，相比于表2对应的方案，能够避免HE STA误读。
因为HE STA并不会读取帧类别子字段中指示是否为Ranging NDPA帧的1比特。表2对应的方案中，帧类别子字段中指示是否为HE NDPA帧的1比特的值为1时，HE STA会将该NDPA帧作为HE NDPA帧读取。然而，NDPA帧中指示是否为HE NDPA帧的1比特的值 为1时，该NDPA帧有可能确实是HE NDPA帧，该NDPA帧也有可能是EHT NDPA帧。然而EHT NDPA帧的字节数可能大于4字节，例如可能为6字节。HE STA会将第3个2字节的前11比特当做AID进行读取。这样若EHT NDPA帧的第3个2字节的前11比特，与HE STA的AID刚好相符，则HE STA会将该AID所在的2字节以及该2字节之后相邻的2字节作为自己的站点信息字段进行读取，造成HE STA误读。
而按照表3对应的方案，NDPA帧中指示是否为HE NDPA帧的1比特的值为0时，HE STA能够会将该NDPA帧识别为VHT NDPA帧，并按照VHT NDPA帧的格式进行读取。若该NDPA帧确实是VHT NDPA帧，则HE STA能够正确读取该VHT NDPA帧。若该NDPA帧为EHT NDPA帧，EHT NDPA帧的每个站点信息字段的前11比特或前12比特为AID，该AID并不会是HE STA的AID，且EHT NDPA帧的第16n+12个比特为消歧子字段。这样EHT NDPA帧中的每2个字节的前12比特都不会与HE STA的AID匹配。HE STA将该EHT NDPA帧当做VHT NDPA帧的格式读取该NDPA帧，将每个站点信息字段的每个2个字节的前12比特作为AID读取，也能够识别出每个2个字节的前12比特均与自己的AID不相符，从而能够避免HE STA将该EHT NDPA帧中的一个站点信息字段误认为是自己的站点信息字段，而导致误读该NDPA帧。
NDPA帧中指示是否为HE NDPA帧的1比特的值为1时，若该NDPA帧实际上确实为HE NDPA帧，则HE STA能够正确读取该HE NDPA帧。若该NDPA帧实际上为Ranging NDPA帧，Ranging NDPA帧的站点信息字段与HE NDPA帧的站点信息字段的结构是相同的。HE STA能够在正确的位置读取该NDPA帧中的AID。Ranging NDPA帧的站点信息字段中不会包含HE STA的AID，HE STA也能通过读取站点信息字段发现每个站点信息字段中的AID都与自己的AID不相符，从而并不会认为该NDPA帧中的其中一个站点信息字段为自己的站点信息字段，也就不会误读该NDPA帧。
然而随着网络技术的发展，在802.11be之后，还会有下一代的标准，可能会支持更大的带宽，这样若需要定义EHT NDPA帧的之后的新的NDPA帧的变种，则无法通过上述2比特的帧类别子字段指示EHT NDPA帧的之后的其他NDPA帧的变种。
如图6所示，图6为本申请实施例的NDPA帧的结构示意图。本申请实施例提供第3种指示类型信息的方案中，在NDPA帧中新增特殊站点信息字段。特殊站点信息字段包括特殊AID和帧子类别字段。
该特殊AID指示特殊站点信息字段。例如特殊AID可以为2047，指示站点信息字段为特殊站点信息字段。现有的标准没有定义2047的AID，这样STA能够根据该特殊AID识别出特殊站点信息字段。应理解，在其他实施例中，特殊AID并不限于是2047，例如也可以是其他没有被定义的AID。
探测对话令牌字段中的帧类别子字段和新增特殊站点信息字段中的帧子类别子字段共同指示NDPA帧的变种。例如，帧类别子字段，指示NDPA帧为非HE NDPA帧及非Ranging NDPA帧。特殊站点信息字段中的帧子类别子字段，指示NDPA帧的变种具体为哪一种。例如，特殊站点字段中的帧子类别子字段可指示该NDPA帧为EHT NDPA。应理解，帧子类别子字段也可以指示NDPA帧的变种为EHT NDPA之后的其他NDPA帧的变种。
具体的，如表4所示，该指示方案中，帧类别子字段的2比特的值均为0时，指示非HE NDPA帧且非Ranging NDPA帧。
表4
Figure PCTCN2021093950-appb-000007
可以理解，该方案中，上述类型信息承载在帧类别子字段和帧子类别子字段。这样能够实现支持指示HE NDPA帧和Ranging NDPA帧之后的一种或多种新的NDPA帧的变种。新的NDPA帧变种例如可以是EHT NDPA帧或者EHT NDPA帧之后的其他NDPA帧。
支持新的变种的NDPA帧的STA能够根据特殊站点字段中的帧子类别子字段，确定该NDPA帧具体为哪一个变种，从而按照NDPA帧的变种的结构读取该NDPA帧。例如，帧类别子字段和帧子类别子字段指示NDPA帧的变种为EHT NDPA。EHT STA可根据帧子类别子字段，确定NDPA帧为EHT NDPA帧。然后EHT STA按照EHT NDPA帧的结构，读取该NDPA帧中的部分带宽信息子字段和列数子字段，从而能够准确地获得所需反馈信道状态信息的部分带宽信息和需要反馈的列数。
帧类别子字段指示该NDPA帧为VHT NDPA帧、HE NDPA帧或Ranging NDPA帧时，EHT STA也能够分别按照VHT NDPA帧、HE NDPA帧或Ranging NDPA帧对应的格式读取该NDPA帧。
应理解，本申请实施例的站点信息字段的字节数为2的整数倍。站点信息字段的字节数可以为4字节，也可以大于4字节，例如6字节。
这样的方案，探测对话令牌字段中的帧类别子字段，将除HE NDPA帧和Ranging NDPA帧作为一类NDPA帧进行指示，然后特殊站点字段中的帧子类别子字段，再指示NDPA帧具体为哪一个变种，能够避免HE STA或Ranging STA误读新的变种的NDPA。
例如，帧子类别子字段指示NDPA帧为EHT NDPA帧。HE STA或Ranging STA能够根据探测对话令牌字段中的帧类别子字段，认为该EHT NDPA帧为VHT NDPA帧，按照VHT NDPA帧的结构读取该EHT NDPA帧。该EHT NDPA帧的站点信息字段中不包含该HE STA或Ranging STA的AID。接收到该EHT NDPA帧的老版本的HE STA或Ranging STA，会根据站点信息字段中的AID与自己的AID不匹配，而不会根据该EHT NDPA帧进行反馈，从而可以避免老版本的HE STA或Ranging STA误读EHT NDPA帧。
进一步的，AP发送的NDPA帧中，特殊站点信息字段的第16n+12个比特为消歧子字段，每个站点信息字段的第16n+12个比特(例如第28比特)为消歧子字段，n为正整数。特殊站点信息字段的第1个比特对应该特殊站点信息字段的B0。每个站点信息字段的第1个比特对应该站点信息字段的B0。
这样，帧类别子字段指示该NDPA帧为非HE NDPA帧及非Ranging NDPA帧时，VHT STA不读取探测对话令牌字段中的帧类别子字段，无法识别NDPA帧的变种。本申请实施例在现有技术的基础上，改变了帧类别子字段的2比特的值均为0时，所指示的NDPA帧的变种，也不会导致VHT STA误读其他变种的NDPA帧。
例如AP发送的NDPA帧为EHT DNPA，EHT NDPA帧的特殊站点信息字段和任一个站 点信息字段的前11比特设置有11比特的AID，该AID不是VHT STA的AID，且特殊站点信息字段和任一个站点信息字段的第16n+12个比特为消歧子字段，这样该EHT NDPA帧的站点信息字段和特殊站点信息字段中，每2个字节的前12比特都不会与VHT STA的AID匹配。VHT STA按照VHT NDPA帧的结构读取该EHT NDPA帧，将特殊站点信息字段或站点信息字段的每个2个字节的前12比特作为AID读取，也能够识别出每个2个字节的前12比特均与自己的AID不相符，从而能够避免VHT STA将该EHT NDPA帧中的特殊站点信息字段或一个站点信息字段误认为是自己的站点信息字段，而导致误读该NDPA帧。
而且，相比于表3的指示方式，表4的指示方式，也不需要改变原有的指示Ranging的帧类别子字段。这样Ranging STA可以继续正常根据帧类别子字段识别出Ranging NDPA帧。
由此可见，上述第3种指示类型信息的方案，能够实现指示一种新的NDPA帧的变种(例如EHT NDPA)，且能够避免VHT STA、HE STA和Ranging STA误读新的变种的NDPA帧。
在一些实施例中，特殊站点信息字段还可以包括禁止子信道位图，禁止子信道位图用于指示前导码打孔信息。
例如，该禁止子信道位图的每一比特对应一个粒度的频域资源，每一比特指示对应的频域资源是否被打孔。该粒度可以为2 n*10MHz，n为正整数。例如该粒度可以为20MHz、40MHz、80MHz等。
禁止子信道位图的比特数可以是固定的。例如，可以设定EHT NDPA帧中的禁止子信道位图的比特数为16比特，能够指示320MHz的带宽的前导码打孔信息。当带宽小于320MHz时，每20MHz对应禁止子信道位图的1比特。禁止子信道位图中的多余的比特指示对应的频域资源被打孔。例如，带宽为240MHz时，禁止子信道位图的前12比特指示240MHz的前导码打孔信息，后4比特指示对应的频域资源被打孔。
禁止子信道位图的比特数也可以是可变的。禁止子信道位图的比特数可根据带宽确定。例如，在粒度为20MHz的情况下，若带宽为160MHz，则该禁止子信道位图的比特数可以为8比特；若带宽为320MHz，则该禁止子信道位图的比特数可以为16比特。在粒度为40MHz的情况下，若带宽为160MHz，则该禁止子信道位图的比特数可以为4比特；若带宽为320MHz，则该禁止子信道位图的比特数可以为8比特。带宽小于80MHz时，禁止子信道位图的比特数也可以为4比特，每20MHz对应禁止子信道位图中的1比特。禁止子信道位图多余的比特指示对应的频域资源被打孔。例如，例如，带宽为40MHz，该禁止子信道位图的前2比特用于指示40MHz中的第1个20MHz的打孔情况和第2个20MHz的打孔情况，该禁止子信道位图的后2比特指示对应的频域资源被打孔。
在一些实施例中，禁止子信道位图也可以承载于AP在NDPA帧之后发送的NDP中。或者，禁止子信道位图仅承载于NDP中。
可选的，特殊站点信息字段还包括带宽指示子字段，用于指示带宽。部分带宽信息子字段所指示的部分带宽在该带宽指示子字段指示的带宽的频域范围内。
为了指示大于160MHz的带宽中的需要反馈信道状态信息的RU或为了指示更多的空间流，本申请实施例提供了一些站点信息字段的设计方案。
本申请实施例中，以AP发送的NDPA帧的变种为EHT NDPA帧为例进行说明。本申请的站点信息字段的设计方案，不局限于用于EHT NDPA帧，也适用于802.11be之后的标准所对应的NDPA帧的变种。
下面阐述NDPA帧对应的带宽大于160MHz的情况下，站点信息字段的设计方案。
在本申请实施例提供的第1种站点信息字段的设计方案中，通过增大站点信息字段的字节数，增加部分带宽信息子字段的比特数，实现部分带宽信息子字段指示大于160MHz的带宽中的需要反馈信道状态信息的RU。例如，NDPA帧中的站点信息字段的字节数可为6字节，部分带宽信息子字段的比特数大于7比特。这样能够指示更大带宽中的需要反馈信道状态信息的RU。站点信息字段的字节数为6字节时，也能够增加列数子字段的比特数，例如列数子字段的比特数大于3，也能够指示更多的列数。应理解，NDPA帧中的站点信息字段的字节数可以为2*N，N大于等于3。例如，NDPA帧中的站点信息字段的字节数还可以为8，10，12等。
进一步的，6字节可依次分为3个2字节，其中的第2个2字节和第3个2字节的第12个比特设置有消歧字段。这样VHT STA按照VHT NDPA帧的个数读取该NDPA帧，将每个2个字节的前12比特作为AID读取，也能够识别出每个2个字节的前12比特均与自己的AID不相符，从而能够避免VHT STA将新的变种的NDPA帧中的一个站点信息字段误认为是自己的站点信息字段，而导致误读新的变种的NDPA帧。
该方案中，站点信息字段中的部分带宽信息子字段包括RU的起始索引和RU的结束索引。RU的起始索引的比特数大于7比特，RU的结束索引的比特数大于7比特。
站点信息字段中的列数子字段的比特数大于3比特。
在具体的实施例中，带宽为320MHz，一个站点信息字段的长度为6字节。EHT NDPA帧的站点信息字段的结构如图7所示。
该实施例中，站点信息字段的部分带宽信息子字段包括RU的起始索引和RU的结束索引。RU的起始索引为8比特，用于指示320MHz中的一个26-tone RU，RU的结束索引为8比特，用于指示320MHz中的一个26-tone RU。其中，第2个字节的第12比特(站点信息字段的第28比特)和第2字节的12比特(站点信息字段的第44比特)设置有消歧字段。
如图7所示，VHT NDPA帧中的站点信息字段的长度为2字节，共16比特。VHT NDPA帧中的站点信息字段的前12比特为AID。VHT STA设备不会读取帧类别子字段，也不会识别NDPA帧的变种。VHT STA会将EHT NDPA帧当做VHT NDPA帧进行读取，这样会导致VHT STA将EHT NDPA帧中的一个站点信息字段的每一个2字节的前12比特作为AID进行读取。若EHT NDPA帧中的一个站点信息字段的第2个2字节的前12比特正好与接收该EHT NDPA帧的VHT STA的AID相符，则会导致误读。本实施例提供的EHT NDPA中的站点信息字段，第1个2字节的前11比特为EHT STA的AID。这样第1个2字节的前12比特不会与VHT STA的AID相符。站点信息字段的第2个2字节的第12比特(B11)为消歧字段。站点信息字段的第2个2字节的前12比特也不会与VHT STA的AID相符。这样能够避免VHT STA将其中一个站点信息字段误认为是自己的站点信息字段，而导致VHT STA误读EHT NDPA帧。
可以理解，8比特的索引字段最多可指示2 8＝256种情况。320MHz最多可包含148个26-tone RU。8比特的RU的起始索引可指示148个26-tone RU中的一个26-tone RU，8比特的RU的结束索引也可指示148个26-tone RU中的一个26-tone RU。
采用第1种站点信息字段的设计方案的实施例中，NDPA帧对应的带宽并不限于上述举例中的320MHz，也可以为240MHz，480MHz等其他大于160MHz的带宽。部分带宽信息子字段的比特数也可以根据带宽的大小进行适应性的调整。
应理解，第1种站点信息字段的设计方案可以与上述第2种和第3种指示类型信息的方案结合实施，也可以单独实施。
采用上述第1种站点信息字段的设计方案的EHT NDPA帧，通过设置消歧字段能够避免VHT STA误读。但是若该EHT NDPA帧采用上述第1种指示类型信息的方案，HE STA并不会读取帧类别子字段中指示是否为Ranging NDPA帧的这一比特，导致HE STA无法区分HE NDPA帧和EHT NDPA帧。HE STA会将EHT NDPA帧当做HE NDPA帧进行读取。HE STA在读取EHT NDPA帧中的一个站点信息字段的第3个2字节时，会将第3个2字节的前11比特当成HE NDPA帧的前11比特的AID去读取。若EHT NDPA帧中的一个站点信息字段的第3个2字节时的前11比特与接收该EHT NDPA帧的HE STA的AID吻合，则会造成HE STA误读该EHT NDPA帧。
采用上述第1种站点信息字段的设计方案的EHT NDPA帧，若采用第2种指示类型信息的方案，HE STA会将EHT NDPA帧当做VHT NDPA帧进行读取。EHT NDPA帧的站点信息字段中的不包含HE STA、Ranging STA和VHT STA的AID且在其他可能被HE STA、Ranging STA或VHT STA认为设置有AID的位置设置有消歧子字段，这样能够避免HE STA误读EHT NDPA帧。
采用上述第1种站点信息字段的设计方案的EHT NDPA帧，若采用第3种指示类型信息的方案，帧类别子字段中的指示是否为HE NDPA帧的这一比特指示为1时，仅指示NDPA帧为HE NDPA帧，并不存在其他指示情况。HE STA能够准确地根据帧类别子字段中的指示是否为HE NDPA帧的这一比特的指示确定是否为HE NDPA帧，并不会将其他变种的NDPA帧当做HE NDPA帧进行读取。
请参阅图8，图8为本申请实施例提供的EHT NDPA帧中的站点信息字段的结构示意图。本申请实施例提供的第2种站点信息字段的设计方案中，站点信息字段的字节数为4字节。相比较于HE NDPA帧，不改变站点信息字段的字节数。该方案通过压缩部分带宽信息的子字段的比特数，改进部分带宽信息子字段的指示方式，来指示更大带宽中的需要反馈信道状态信息的RU和/或指示大于8的列数。
例如，可压缩部分带宽信息子字段的比特数。部分带宽信息子字段的比特数可小于等于13比特，这样能够增加列数子字段的比特数，使得列数子字段的比特数大于等于4比特，从而使得列数子字段可以指示更多的列数；也可以在压缩部分带宽信息的子字段的比特数的同时，使得资源单元起始索引和资源单元结束索引支持指示更大的带宽中的需要反馈信道状态信息的RU。当然，采用该方案也不限于需要将列数子字段的比特数增加至大于等于4比特，列数子字段的比特数也可以为3比特。
在一种可能的实现方式中，站点信息字段的部分带宽信息子字段包括资源单元起始索引和资源单元偏移量索引，资源单元起始索引用于指示AID对应的站点所需反馈信道状态信息的RU的第1个RU，资源单元偏移量索引指示所需反馈信道状态信息的最后一个RU相对于第1个RU的偏移量。或者说，资源单元起始索引指示Bfer要求反馈的第1个RU。资源单元偏移量索引指示Bfer要求反馈的最后一个RU相对于第1个RU的偏移量。偏移量可为0。
可以理解，资源单元偏移量索引指示的RU的偏移量，也并不是指带宽真实包含的RU，而是通过指示RU的偏移量指示频域子载波的偏移量，从而与资源单元起始索引配合指示一段连续的频域范围。
如图8所示，该站点信息字段不限于用于EHT NDPA帧，也可以用于EHT NDPA帧之后的其他NDPA帧的变种。
请参阅图8，资源单元起始索引的比特数为8比特，这样能够在带宽为320MHz时，指示320MHz对应的148个26-tone RU中的一个26-tone RU。资源单元偏移量索引的比特数可小于等于5比特。这样部分带宽信息子字段的比特数小于等于13比特，从而可以使得列数子字段的子字段能够大于等于4比特，以实现指示更多的列数。
应理解，站点信息字段的第28比特(B27)设置有消歧子字段，用于避免老版本的STA误读。消歧子字段避免误读的原理请参考上述实施例中的相关描述，此处不再赘述。
在一种具体的实施例中，可通过不同的资源单元偏移量索引，指示不同大小的偏移量。下面针对带宽为320MHz的场景，进行举例说明。
在一个例子中，资源单元偏移量索引与对应的偏移量的对应关系如下表5所示。
表5
Figure PCTCN2021093950-appb-000008
例如，资源单元偏移量索引为0010，则指示所需反馈信道状态信息的最后一个RU相对于第1个RU的偏移量为52-tone RU。进一步的，若资源单元起始索引指示站点所需反馈信道状态信息的第1个RU为第1个26-tone RU，站点所需反馈信道状态信息的RU则为第1个26-tone RU和与第1个26-tone RU相邻的52-tone RU。这样，站点所需反馈信道状态信息的频域范围为第1个26-tone RU和与第1个26-tone RU相邻的52-tone RU对应的频域范围，320MHz中频率最低的前78个子载波。
在另一例子中，资源单元偏移量索引与对应的偏移量的对应关系如下表6所示。
表6
Figure PCTCN2021093950-appb-000009
Figure PCTCN2021093950-appb-000010
例如，资源单元偏移量索引为0011，则指示所需反馈信道状态信息的最后一个RU相对于第1个RU的偏移量为4*26-tone RU。
在带宽为320MHz时，若以26-tone RU为粒度，通过资源单元起始索引指示第1个RU和通过资源单元结束索引指示最后一个RU，资源单元起始索引和资源单元结束索引分别需要8比特，也即，部分带宽信息子字段至少需要16比特。而上述通过资源单元起始索引和资源单元偏移量索引进行指示的方案，10个资源单元偏移量索引能够指示10种不同大小的资源偏移量，资源单元偏移量的比特数可为4比特。这样可以使得部分带宽信息子字段的比特数更少。这样节省出来的比特数可用于增加列数子字段的比特数，从而能够实现指示更多的空时流数。
当然，在其他实施方式中，资源单元偏移量索引与偏移量的对应关系，并不限于上述表5或表6所示的举例，也可以设置其他的对应关系。资源单元偏移量索引的比特数也不限于4比特，只需满足资源单元起始索引的比特数与资源单元偏移量索引的比特数小于等于13比特即可。
在另一具体的实施例中，资源单元偏移量索引通过指示所需反馈信道状态信息的RU相对于基本粒度的倍数，指示偏移量，基本粒度大于或等于26子载波的RU。或者说，资源单元偏移量索引通过指示偏移量除以基本粒度得到的数值，指示偏移量。通过数学表达式表达可以为N＝偏移量/基本粒度。资源单元偏移量索引可通过指示N指示偏移量。N为正整数。
例如，带宽为320MHz，包括148个26-tone RU。基本粒度为8*26-tone RU。偏移量有20种情况。资源单元偏移量的比特数可以为5位，指示20种情况。资源单元偏移量索引与对应的偏移量的对应关系可参阅表7。
表7
Figure PCTCN2021093950-appb-000011
Figure PCTCN2021093950-appb-000012
若偏移量为8个26-tone RU，则资源单元偏移量索引可以为00001。若偏移量为16个26-tone RU，则资源单元偏移量索引可以为00010。
资源单元起始索引可为8比特。资源单元起始索引可指示148个26-tone RU中的一个RU。STA可根据资源单元起始索引和资源单元偏移量索引确定所需反馈信道状态信息的第1个RU和最后一个RU，或者说，STA可根据资源单元起始索引和资源单元偏移量索引确定所需反馈信道状态信息的RU的范围。
例如，若资源单元起始索引指示该站点信息对应的STA所需反馈信道状态信息的第1个RU为148个26-tone RU中的第9个26-tone RU，且资源单元偏移量索引为00010，则可确定该STA所需反馈信道状态信息的最后一个RU为第25个26-tone RU。该STA所需反馈信道状态信息的RU为第9个26-tone RU-第25个26-tone RU。
又例如，若根据资源单元起始索引和资源单元偏移量索引确定的该STA所需反馈信道状态信息的最后一个RU的排序号大于148，则可确定该STA所需反馈信道状态信息的最后一个RU为第148个RU。例如，资源单元起始索引指示的所需反馈信道状态信息的第1个RU为在148个26-tone RU中的第142个RU，资源单元偏移量索引指示偏移量为8个26-tone RU，则可确定该STA所需反馈信道状态信息的最后一个RU为第148个RU。
可以理解，可通过调节基本粒度，调节资源单元偏移量索引的压缩程度。基本粒度越大，压缩程度越大。压缩程度越大，指示相同的偏移量所需的比特数越少，这样部分带宽信息子字段就能支持指示更大的带宽中的需要反馈信道状态信息的RU。
在另一种可能的实现方式中，部分带宽信息子字段包括RU指示索引，RU指示索引包括频域指示部分和RU指示部分，频域指示部分用于指示AID对应的站点所需反馈信道状态信息的RU所在的频域范围，RU指示部分用于指示所需反馈信道状态信息的RU。
在一个具体的实施例中，带宽为320MHz，将320MHz分为4个频域范围，也可称作4个频域分片。4个频域范围，按照频率由低至高的顺序，依次对应320MHz中的第1个80MHz、第2个80MHz、第3个80MHz和第4个80MHz。频域指示部分的比特数可以为2比特，指示STA所需反馈信道状态信息的RU所在的频域范围为4个频域范围中的其中一个频域范围。 例如，频域指示部分与所指示的频域范围的对应关系可参阅表8。
表8
频域指示部分 频域范围
00 第1个80MHz
01 第2个80MHz
10 第3个80MHz
11 第4个80MHz
RU指示部分为7比特，用于指示所需反馈信道状态信息的RU为频域指示部分所指示的频域范围中的一个RU或多个RU的组合。RU指示部分与所指示的RU的关系可参阅表9。
表9
Figure PCTCN2021093950-appb-000013
Figure PCTCN2021093950-appb-000014
Figure PCTCN2021093950-appb-000015
上述表9中的每个条目的RU指示部分为十进制数值，在部分带宽信息子字段中，RU指示索引的RU指示部分为上述表9中的十进制数值对应的二进制数值。
应理解，上述表9中的每个条目的RU指示部分与指示的RU的对应关系仅为其中可选的实施例，本申请并不限定RU指示部分与指示的RU的对应关系仅限于表8中的对应关系，在其他实施例中，RU指示部分与指示的RU的对应关系也可以与表8中的对应关系不同。
结合表8和表9，在一个具体的例子中，RU指示索引的前2位为频域指示部分，后7位为RU指示部分，若RU指示索引为000000001，00指示第1个80MHz，0000001指示80MHz中的第2个26-tone RU，则000000001指示站点所需反馈信道状态信息的RU为第1个80MHz中的第2个26-tone RU；若RU指示索引为111000010，11指示第4个80MHz，1000010指示80MHz中的第2个484-tone RU，那么111000010指示站点所需反馈信道状态信息的RU为第4个80MHz中的第2个484-tone RU。
在又一种可能的实现方式中，部分带宽信息子字段包括资源单元起始索引和资源单元结束索引，资源单元起始索引用于指示AID对应的站点所需反馈信道状态信息的第1个RU，资源单元结束索引用于指示AID对应的站点所需反馈信道状态信息的最后一个RU。
该实现方式中，对资源单元起始索引和资源单元结束索引进行压缩，将资源单元起始索引和资源单元结束索引指示的RU的粒度增大。例如，将粒度从26-tone RU增加为2*26-tone RU或者4*26-tone RU。
具体地，资源单元起始索引指示的第1个RU为(k 1*n+c 1)*26-tone RU，c 1，k 1为正整数，n为自然数，资源单元结束索引指示的最后一个RU为(k 2*m+c 2)*26-tone RU，c 2，k 2为正整数，m为自然数，资源单元起始索引通过指示n指示第1个RU，资源单元结束索引通过指示m指示最后一个RU，k 1≥2和/或k 2≥2。
例如，在一个具体的实施例中，带宽为320MHz，k 1为2，c 1为1。资源单元起始索引指示第1个，第3个，第5个，……，第2n+1个，第147个26-tone RU，n≤73。这样，资源单元起始索引指示的第1个RU的粒度为2*26-tone RU。资源单元起始索引共指示74种情况，需要7比特。K 2为4，c 2为2，资源单元结束索引指示第2个，第6个，……，第4n+2个，第150个26-tone RU。这样，资源单元结束索引指示的最后一个RU的粒度为4*26-tone RU。资源单元结束索引共指示37种情况需要6比特，n≤37。
资源单元起始索引与RU的对应关系可参阅表10，资源单元结束索引与RU的对应关系可参阅表11。
表10
Figure PCTCN2021093950-appb-000016
Figure PCTCN2021093950-appb-000017
表11
Figure PCTCN2021093950-appb-000018
可以理解，资源单元结束索引指示的RU的序号的值，大于带宽对应的最后一个RU的序号的值时，资源单元结束索引指示的RU为带宽对应的最后一个RU。例如上述举例中，在带宽为320MHz时，资源单元起始索引指示第150个26-tone RU时，实际上指示的RU为第148个26-tone RU。
可通过调整k 1或k 2中的任一个或两个的值，调节部分带宽信息子字段的压缩程度。k 1越大，部分带宽信息子字段的压缩程度越大，k 2越大，部分带宽信息子字段的压缩程度越大。压缩程度越大，指示相同的部分带宽信息所需的比特数越少，这样部分带宽信息子字段就能指示更大的带宽中的需要反馈信道状态信息的RU。
可选的，带宽小于等于160MHz时，部分带宽信息子字段可按照HE NDPA中的方式指示部分带宽信息。
应理解，上述第2种站点信息字段的设计方案，可以单独实施，也可以与上述任一指示类型信息的方案结合实施。
采用第二种站点信息字段的设计方案设置的EHT NDPA帧，站点信息字段的字节数数为4字节，与HE NDPA帧的字节数保持一致。EHT NDPA帧的站点信息字段中的不包含HE STA、Ranging STA和VHT STA的AID且在其他可能被HE STA、Ranging STA或VHT STA认为设置有AID的位置设置有消歧子字段，这样能够避免HE STA、Ranging STA或VHT STA误读EHT NDPA帧。
下面阐述NDPA帧中的列数子字段指示的列数大于8的情况下，站点信息字段中的列数子字段的设计方案。该列数子字段设计方案，适用于站点信息字段为6字节的情况，也适用于站点信息字段为4字节的情况。
具体的，可通过增加列数子字段的比特数，来实现指示更多的列数。
例如，需要反馈的列数的范围为1-16时，列数子字段的比特数可以为4比特。4比特的字段能够指示2 4＝16种情况。列数子字段可通过列数索引的方式指示列数。列数索引与列数的对应关系，可参阅表12。
表12
列数索引 列数
0000 1
0001 2
0010 3
…… ……
1110 15
1111 16
应理解，列数索引与列数的对应关系并不限于表12所示的对应关系，在其他实施例中，可设置灵活涉及列数索引与列数的对应关系。
上述列数子字段的设计方案可以与上述任一站点信息字段的设计方案结合实施，也可以单独实施。
在NDPA帧对应的带宽大于160MHz且列数子字段指示的列数大于8的情况下，站点信息字段中的部分带宽信息子字段的设计方案可采用上述NDPA帧对应的带宽大于160MHz的情况下的任一站点信息字段的设计方案，列数子字段的设计方案可参考上述列数子字段指示的列数大于8的情况下，列数子字段的设计方案。
在一种可选的实施例中，当带宽小于等于160MHz时，部分带宽信息子字段按照HE NDPA中的方式指示部分带宽信息，当带宽大于160MHz时，按照上述的部分带宽信息子字段的指示方案指示。
在另一种可选的实施例中，带宽小于等于160MHz时，或者需要反馈的列数的最大值小于或等于8时，EHT NDPA帧中的站点信息字段也可以采用本申请上述任一实施例中的站点信息字段的设计方案。
进一步的，带宽大于160MHz、带宽小于等于160MHz、需要反馈的列数小于等于8和需要反馈的列数大于8的情况下，EHT NDPA帧中的站点信息字段采用统一的格式。也即是说，EHT NDPA帧中的站点信息字段在采用统一的格式。这样EHT STA能够采用统一的读取策略读取所有的EHT NDPA帧中的站点信息字段，更加便于EHTSTA读取EHT NDPA帧。
本申请实施例还提供另一种站点信息字段的设计方案，当带宽大于160MHz时，一个站点对应两个站点信息字段。也即是说，NDPA帧包括对应同一个站点的两个站点信息字段。这两个站点信息字段包含同一个站点的AID。该方案可与上述任一指示类型信息的方案结合实施，也可以单独实施。
该站点的部分带宽信息的指示方式为，这两个站点信息字段中的部分带宽信息子字段，共同指示该AID对应的STA所需反馈的信道状态信息的第1个RU和最后一个RU。可以理解，这样的方案，是将指示该AID对应的STA对应的部分带宽信息子字段，分为了两部分，分别在包含有该AID的两个站点信息字段中传输。
这样能够在不改变NDPA帧原本包含的站点对应的一个站点信息字段的基础上，新增一个与站点对应的站点信息字段，通过两个与站点信息字段配合指示部分带宽信息，从而能够实现指示更大的带宽中的需要反馈信道状态信息的RU。
进一步的，按照频率由低至高的顺序，当指示的部分带宽属于带宽的前160MHz时，EHT NDPA帧中部分带宽信息子字段可采用HE NDPA中的部分带宽信息子字段的设置方式。站点的部分带宽属于带宽的前160MHz时，在EHT NDPA帧中包括包含有该站点的AID的两个站点信息字段，两个站点信息字段配合指示部分带宽信息，从而能够实现按需增加每个站点对应的站点信息字段所占的比特数，而不是一味地增加所有站点对应的站点信息字段的比特数，从而能够降低开销。
如图9所示，图9为本申请实施例提供的另一NDPA帧的结构示意图。在一个实施例中， 两个站点信息字段中的一个站点信息字段中的资源单元起始索引和另一个站点信息字段中的资源单元起始索引指示相同的AID对应的站点所需反馈的信道状态信息的第1个RU，一个站点信息字段中的资源单元结束索引和另一个站点信息字段中的资源单元结束索引指示相同的AID所需反馈的信道状态信息的最后一个RU。
例如，两个站点信息字段中的一个站点信息字段中的资源单元起始索引的比特数为7比特，另一个站点信息字段中的资源单元起始索引为1比特。这样，一个站点信息字段中的7比特的资源单元起始索引和另一个站点信息字段中的1比特的资源单元起始索引配合指示该相同的AID对应的STA所需反馈的信道状态信息的第1个RU。
可以理解，一个站点信息字段中的7比特的资源单元起始索引，与另一个站点信息字段中的1比特的资源单元起始索引共同组成一个完整的资源单元起始索引。另一个站点信息字段中的1比特的资源单元起始索引可为完整的资源单元起始索引的最重要位(most significant bit，MSB)，也可以称作最高位。
类似的，一个站点信息字段中的1比特的资源单元结束索引，与另一个站点信息字段中的1比特的资源单元结束索引共同组成一个完整的资源单元结束索引。该完整的资源单元结束索引能够指示站点所需反馈信道状态信息的第1个RU。另一个站点信息字段中的1比特的资源单元结束索引可为完整的资源单元结束索引的最重要位，也可称作最高位。
当然，两个站点信息字段中的资源单元起始索引的比特数和资源单元结束索引的比特数并不限于上述举例，也可以为其他比特数。
图10为本申请实施例提供的又一NDPA帧的结构示意图。如图10所示，在另一个实施例中，两个站点信息字段中的一个站点信息字段中包含资源单元起始索引而不包含资源单元结束索引，另一个站点信息字段中包含资源单元结束索引而不包含资源单元起始索引。这样一个站点信息字段中的资源单元起始索引指示这两个站点信息字段对应的STA所需反馈信道状态信息的第1个RU，另一个站点信息字段中的资源单元结束索引指示这两个站点信息字段对应的STA所需反馈信道状态信息的最后一个RU。这样，在带宽为320MHz的场景下，这两个站点信息字中的部分带宽信息子字段的比特数都只有8比特，从而可以实现将站点信息字段的字节数控制在4字节以内，并能够支持指示320MHz中的需要反馈信道状态信息的RU。这样减小每个站点信息字段中的部分带宽信息子字段的比特数，从而可以增加列数子字段的比特数，从而也能够实现指示更多的列数。
当所需指示的列数大于8时，该列数的指示方式可以为，两个站点信息字段中的一个站点信息字段中的列数子字段和另一个站点信息字段中的列数子字段指示相同的AID对应的站点所需反馈的信道状态信息的列数。在一种可能的实施例中，如图9所示，一个站点信息字段中的列数子字段的比特数为3比特，另一个站点信息字段中的列数子字段的比特数为1比特。一个站点信息字段中的列数子字段和另一个站点信息字段中的列数子字段组成一个完整的列数子字段。该完整的列数子字段能够准确地指示列数。另一个站点信息字段中的1比特的列数子字段可为完整的列数子字段的最重要位(MSB)或最高位。
可以理解，上述部分带宽信息的指示方式的方案，与上述列数的指示方式可以结合实施，也可以单独实施，本申请不作限定。
图11为本申请实施例提供的又一NDPA帧的结构示意图。如图11所示，在又一个实施例中，两个站点信息字段中的一个站点信息字段中包含部分带宽信息子字段而不包含列数子字段，另一个站点信息字段中包含列数子字段，而不包含部分带宽信息子字段。
可选的，当站点所需反馈信道状态信息的部分带宽的频率，按照频率由低至高的顺序，不在整个带宽的前160MHz之内时，该站点才会对应上述的两个站点信息字段，该两个站点信息字段包含该站点的AID，也即该两个站点信息包含的AID是相同的。当站点所需反馈信道状态信息的部分带宽的频率，在整个带宽的前160MHz之内时，该STA只对应一个站点信息字段，这样能够避免多余增加站点信息字段而导致增大开销。
下面详细阐述站点反馈的波束成形报告中的相关内容。
如表13所示，波束成形报告包括类别(category)信息、EHT动作信息、EHT多输入多输出(Multiple Input Multiple Output，MIMO)控制(control)信息，压缩波束成形报告和多用户独家波束成型报告(MU exclusive beamforming report)。
表13
Figure PCTCN2021093950-appb-000019
在一些实施例中，波束成形报告中的MIMO控制字段为EHT MIMO控制信息承载在EHT MIMO控制字段。请参阅图12，图12为本申请实施例提供的EHT MIMO控制字段的结构示意图。EHT MIMO控制字段包括：列数子字段、行数子字段、带宽(bandwidth，BW)子字段、分组子字段，码本信息子字段、反馈类型子字段、剩余反馈分片子字段、第一反馈分片子字段、资源单元起始索引、资源单元结束索引、探测对话令牌子字段、禁止子信道位图存在/长度子字段和禁止子信道位图。
其中，列数子字段用于指示反馈的列数。行数子字段用于指示反馈的行数。信道宽度子字段用于指示信道的带宽。分组子字段为分组比特位图，用于指示子载波的分组情况，同一组的子载波的信道状态信息是统一反馈的。反馈类型子字段用于指示反馈的类型。剩余反馈分片用于指示还未反馈的分片，第一反馈分片子字段用于指示是否为第一反馈分片。资源单元起始索引用于指示该站点所需反馈信道状态信息的第1个RU，资源单元结束索引用于指示该站点所需反馈信道状态信息的最后一个RU。
禁止子信道位图存在/长度子字段指示是否存在禁止子信道位图，以及在存在禁止子信道位图时，指示禁止子信道位图的长度。例如，禁止子信道位图存在/长度子字段指示为0时，则可理解为指示不存在禁止子信道位图。
在一个例子中，禁止子信道位图的每一比特用于指示20MHz的前导码打孔信息。EHT  MIMO控制字段中的禁止子信道位图的描述可参上述实施例中，NDPA帧中的禁止子信道位图的相关描述。如此，在波束成形报告的EHT MIMO控制字段中，也包含禁止子信道位图，这样能够避免EHT MIMO控制字段误读。可采用上述任一压缩部分带宽信息的子字段的比特数的方案，压缩EHT MIMO控制字段中的资源单元起始索引和资源单元结束索引。
禁止子信道位图存在/长度子字段可通过指示带宽或比特数的方式，指示禁止子信道位图的长度。例如，禁止子信道位图存在/长度子字段可指示带宽为320MHz，这样就能实现指示禁止子信道位图的长度为16比特，或者禁止子信道位图存在/长度子字段指示带宽为240MHz，以实现指示禁止子信道位图的长度为12比特，或者禁止子信道位图存在/长度子字段指示带宽为160MHz，以实现指示禁止子信道位图的长度为8比特。当然，禁止子信道位图存在/长度子字段的指示方式以及所指示的长度不限于上述举例，在其他实施例中，禁止子信道位图存在/长度子字段可以采用其他方式进行指示，也可以指示其他长度。
这样，接收EHT MIMO控制字段的网络设备能够根据禁止子信道位图存在/长度子字段，准确地接收EHT MIMO控制字段。
在一种可选的实施例中，上述NDPA帧可通过触发帧实现。也即是说，步骤502中的NDPA帧可为触发帧，触发帧中包括本申请上述提供的任一实施例的NDPA帧中的内容。
具体的，请参阅图13，图13为触发帧的结构示意图。触发帧包括触发帧类型字段，该字段指示触发帧为NDPA触发帧。触发帧还包括带宽字段、探测对话令牌和NDPA帧类型字段。类型信息承载在该NDPA帧类型字段中，用于指示NDPA帧的变种。
上述任一实施例中，站点信息字段中的相关内容的设计方案，都适用于触发帧中的站点信息字段，此处不再一一赘述。
触发帧中的站点信息字段，可不包括消歧字段。因为，在802.11ax以及之前的标准协议中，NDPA帧并没有通过触发帧发送。相应的HE STA以及802.11ax之前的标准适配的STA(例如VHT STA)也不会通过触发帧接收NDPA。通过触发帧发送NDPA帧的方案，不需要考虑被与802.11ax以及之前的标准协议适配的设备误读的问题，也就不需要设置消歧字段。
进一步的，请参阅图14，图14为波束成形报告的反馈过程示意图。NDPA帧通过触发帧发送。Bfee包括多个站点(如图14中的STA1、ST2和STA3)。AP先通过触发帧的形式发送NDPA帧，在SIFS之后，再发送NDP。
触发帧能够触发多个站点同时进行上行传输，例如图14中，STA1、ST2和STA3能够同时反馈波束成形报告，能够提升信道探测的效率。
本申请实施例还提供另一种部分带宽信息的指示方案，站点信息中包括RU指示索引，RU指示索引通过指示所需信道状态信息的部分或全部带宽对应的RU，指示所需信道状态信息的带宽信息。RU指示索引可理解为部分带宽信息字段或部分带宽信息子字段。
RU指示索引指示RU的最小粒度为242-tone RU，这样不必指示小RU，从而有助于减少RU指示索引的比特数，减少指示开销。
RU指示索引指示所需信道状态信息的部分或全部带宽对应的RU的大小以及RU在完整的带宽中的频率位置。
具体地，对于242-tone RU，对应带宽为20MHz，可以由16个不同的RU指示索引，指示242-tone RU在320MHz中的不同的位置，例如该16个不同的RU指示索引，分别用于指示320MHz中，按照频率由低至高的顺序对应的16个20MHz。
对于484-tone RU，对应带宽为40MHz，可以由8个不同的RU指示索引，指示484-tone RU在320MHz中的不同的位置，例如该8个不同的RU指示索引，分别用于指示320MHz中，按照频率由低至高的顺序对应的8个40MHz。
对于242+484-tone RU，对应60MHz，可以由16个不同的RU指示索引，指示242+484-tone RU在320MHz中的不同的位置。例如，将320MHz按照频率由低至高的顺序理解为第1个80MHz，第2个80MHz，第3个80MHz和第4个80MHz。可以由4个不同的RU指示索引，分别指示242+484-tone RU在第1个80MHz中的位置，由另外4个不同的RU指示索引，分别指示242+484-tone RU在第2个80MHz中的位置，再由另外4个不同的RU指示索引，分别指示242+484-tone RU在第3个80MHz中的位置，再由另外4个不同的RU指示索引，分别指示242+484-tone RU在第4个80MHz中的位置。
对于996-tone RU，对应80MHz，可以由4个不同的RU指示索引，指示996-tone RU在320MHz中的不同的位置，例如该4个不同的RU指示索引，分别用于指示320MHz中，按照频率由低至高的顺序对应的4个80MHz。
对于484+996-tone RU，对应120MHz，可以由4个不同的RU指示索引，分别指示484+996-tone RU在320MHz中的最低频率的160MHz中的不同的位置，又另外4个不同的RU指示索引，分别指示484+996-tone RU在320MHz中的最高频率的160MHz中的不同的位置。
对于2*996-tone RU，对应160MHz，可以由6个不同的RU指示索引，指示2*996-tone RU在320MHz中的不同的位置。也可以进一步规定2*996-tone RU所在的位置，仅支持320MHz带宽中，频率最低的160MHz中的2*996-tone RU和频率最高的160MHz中的2*996-tone RU，仅对应2个不同的RU指示索引。
对于3*996-tone RU，对应240MHz，可以由4个不同的RU指示索引，指示3*996-tone RU在320MHz中的不同的位置。
对于4*996-tone RU，对应320MHz，这种情况可以理解为指示全带宽，可由一个RU指示索引进行指示。
RU指示索引的比特数例如可以是但不限于6比特或7比特。
应理解，RU指示索引指示的RU的类型不限于上述举例的类型，RU指示索引也可以指示其他类型的RU以及RU在带宽中的位置。
例如，RU指示索引可以为6比特，在一个实施例中，RU指示索引可以按照表14进行指示。
表14
Figure PCTCN2021093950-appb-000020
Figure PCTCN2021093950-appb-000021
Figure PCTCN2021093950-appb-000022
应理解，表14中，RU指示索引与所指示的带宽/RU的对应关系，是按照RU由小至大的顺序排列的，在其他实施例中，RU指示索引与所指示的带宽/RU的对应关系，并不限于上述表14中的对应关系，RU指示索引与所指示的带宽/RU的对应关系是可以调整、变换的，只要根据RU指示索引能得到对应的带宽/RU即可。
可选的，对于N*996-tone RU，对应N*80MHz，可由14个不同的RU指示索引，指示N*996-tone RU在320MHz中的不同的位置。N＝1，2，3。
可选的，指示N*996-tone RU的RU指示索引，可包括4个比特用于作为比特位图。该4个比特的每一比特对应320MHz中的一个80MHz。例如，该比特位图为1100，则指示2*996-tone RU位于320MHz中的第1个80MHz和第2个80MHz，该比特位图为0010，则指示996-tone RU位于320MHz中的第3个80MHz。
可选的，该4比特的比特位图为RU指示索引的后4位。
对于4*996-tone RU，对应320MHz，这种情况可以理解为指示全带宽，可由一个RU指示索引进行指示。例如，可按照上述N*996-tone RU对应的RU指示索引的指示方式，指示4*996-tone RU的RU指示索引，也包括4比特的比特位图，该比特位图为1111，指示4*996-tone RU位于320MHz中的第1-4个80MHz。
如表14-表21，指示4*996-tone RU的RU指示索引可用于指示4*996-tone RU，也可以用于指示全带宽(完整的带宽)。
例如，RU指示索引可以为6比特，在一个实施例中，RU指示索引可以按照表15-1进行指示。
表15-1
Figure PCTCN2021093950-appb-000023
Figure PCTCN2021093950-appb-000024
Figure PCTCN2021093950-appb-000025
其中，100001-101110指示N*996-tone RU的具体对应关系可以如表16所示，100001-101110中后4比特具体指示N*996-tone RU，后4比特实现比特位图的作用。
表16
Figure PCTCN2021093950-appb-000026
Figure PCTCN2021093950-appb-000027
对于所需反馈信道状态信息的带宽为全带宽时，有两种指示方案。下面分别阐述这两种指示方案。
其中一种指示方案是，所需反馈信道状态信息的带宽为全带宽时，无论带宽是多少，RU指示索引指示全带宽或与全带宽对应的RU；例如，带宽为20MHz,40MHz,80MHz或160MHz，320MHz，所述RU指示索引指示的是全带宽或与所述全带宽对应的RU(例如表15-1中采用RU指示索引(例如101111)指示全带宽或4*996-tone RU。
另一种指示方案是，当所需反馈信道状态信息的带宽为全带宽，只有带宽等于全带宽时， 例如只有当RU对应的带宽为320MHz，与所需反馈信道状态信息的带宽为全带宽320MHz相同时，采用指示4*996-tone RU的RU指示索引(例如表15-1中的101111)进行指示。
当所需反馈信道状态信息的带宽为全带宽，当带宽小于全带宽时，采用与该带宽对应的RU的RU指示索引进行指示。例如：
当带宽为20MHz时，若所需反馈信道状态信息的带宽为全带宽，可采用指示20MHz所在的那个242-tone RU的RU指示索引进行指示。例如，基于表15-1，可以采用000000-001111中的一个进行指示。
当带宽为40MHz时，若所需反馈信道状态信息的带宽为全带宽，可采用指示40MHz所在的那个484-tone RU的RU指示索引进行指示。例如，基于表15-1，可以采用010000-010111中的一个进行指示。
当带宽为80MHz时，若所需反馈信道状态信息的带宽为全带宽，可采用指示80MHz所在的那个996-tone RU的RU指示索引进行指示。例如，基于表15-1，可以采用100001-101110中的一个进行指示。当
当带宽为160MHz时，若所需反馈信道状态信息的带宽为全带宽，可采用指示160MHz所在的那个2*996-tone RU的RU指示索引进行指示。例如，基于表15-1，可以采用100001-101110中的一个进行指示。
可选的，表15-1中RU指示索引100001-101110和101111所在的行可替换为下表15-2。
表15-2
Figure PCTCN2021093950-appb-000028
上述表15-1中的对应关系，RU指示索引与所指示的带宽/RU的对应关系是可以调整、变换的。
可选的，RU指示索引的比特数也可以为7比特，可以支持指示更多的RU类型。
具体地，对于2*996+484-tone RU，对应200MHz，可由12个不同的RU指示索引，指示2*996+484-tone RU在320MHz中的不同的位置。具体的，在320MHz中频率最低的240MHz中，对应6个不同的RU指示索引，指示该频率最低的240MHz中的不同位置的；在320MHz中频率最高的240MHz中，对应另外6个不同的RU指示索引。
对于3*996+484-tone RU，对应280MHz，可由8个不同的RU指示索引，指示3*996+484-tone RU在320MHz中的不同的位置。
例如，RU指示索引可以按照表17进行指示。
表17
Figure PCTCN2021093950-appb-000029
Figure PCTCN2021093950-appb-000030
Figure PCTCN2021093950-appb-000031
例如，在另一种可能的实现方式中，RU指示索引可以按照表18进行指示。表18中，除指示N*996-tone RU的RU指示索引之外的RU指示索引是按照RU由小至大的顺序排列的。指示N*996-tone RU的索引包括4比特的比特位图。
表18
Figure PCTCN2021093950-appb-000032
Figure PCTCN2021093950-appb-000033
Figure PCTCN2021093950-appb-000034
可选的，RU指示索引的比特数也可以为7比特，可以支持指示更多的RU类型。例如，对于2*996+484-tone RU，对应200MHz，可由12个不同的RU指示索引，指示2*996+484-tone RU在320MHz中的不同的位置。对于3*996+484-tone RU，对应280MHz，可由8个不同的RU指示索引，指示3*996+484-tone RU在320MHz中的不同的位置。
例如，RU指示索引可以按照表19进行指示。其中，指示N*996-tone RU的索引包括4比特的比特位图。
表19
Figure PCTCN2021093950-appb-000035
Figure PCTCN2021093950-appb-000036
上述表19中的对应关系，RU指示索引与所指示的带宽/RU的对应关系是可以调整、变换的。
例如，在另一种可能的实现方式中，RU指示索引可以按照表20进行指示。表20中，除指示N*996-tone RU的RU指示索引之外的RU指示索引是按照RU由小至大的顺序排列的。指示N*996-tone RU的索引包括4比特的比特位图。
表20
Figure PCTCN2021093950-appb-000037
Figure PCTCN2021093950-appb-000038
Figure PCTCN2021093950-appb-000039
在一种可选的实施例中，RU指示索引为5比特，指示单RU。这样能够更进一步地降低指示开销。
例如，RU指示索引可以按照表21进行指示。
表21
Figure PCTCN2021093950-appb-000040
Figure PCTCN2021093950-appb-000041
上述本申请提供的实施例中，分别从接入点、站点的角度对本申请实施例提供的方法进行了介绍。为了实现上述本申请实施例提供的方法中的各功能，接入点、站点可以包括硬件结构、软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能可以以硬件结构、软件模块、或者硬件结构加软件模块的方式来执行。
请参阅图15，图15为本申请实施例的传输装置的结构示意图。传输装置包括处理单元1501和发送单元1502；
处理单元1501用于生成NDPA帧，所述NDPA帧包括站点信息字段，所述站点信息字段包括指示一个站点的关联标识符AID的AID子字段；所述站点信息字段还包括部分带宽信息子字段和/或列数子字段；所述部分带宽信息子字段指示所述NDPA帧对应的带宽中，所述站点所需反馈信道状态信息的RU，所述列数子字段指示压缩波束成形反馈矩阵的列数；所述NDPA帧对应的带宽大于160MHz，所述列数子字段指示的列数大于8；
发送单元1502用于发送所述NDPA帧。
这样，NDPA帧的部分带宽信息子字段指示大于160MHz的带宽中的需要反馈信道状态信息的RU。站点信息字段能够指示站点进行大于160MHz的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更大的带宽传输数据，提高传输效率。列数子字段指示的列数大于8。站点信息字段能够指示站点进行列数大于8的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更多的流数传输数据，提高传输效率。
该传输装置1500可以为通信装置或接入点，或者该传输装置1500可部署在通信装置或部署在接入点。该传输装置1500的处理单元1501可为处理器，该传输装置1500的发送单元1502可以为收发器。
应理解，上述NAPD帧的传输方法的相关描述也适用于该传输装置1500，此处不再赘述。
请参阅图16，图16为本申请实施例的传输装置的结构示意图。传输装置包括处理单元1601和发送单元1602；
处理单元1601用于生成NDPA帧，所述NDPA帧包括两个站点信息字段，所述两个站点信息字段包括指示同一个站点的关联标识符AID的AID子字段；发送单元1602用于发送所述NDPA帧。
其中，两个站点信息字段符合以下至少一种：
两个站点信息字段中的部分带宽信息子字段共同指示所述站点所需反馈信道状态信息的RU，所述NDPA帧对应的带宽大于160MHz；或
所述一个站点信息字段中的列数子字段和所述另一个站点信息字段中的列数子字段指示 压缩波束成形反馈矩阵的列数，所述列数子字段指示的列数大于8。
如此，能够在不改变NDPA帧原本包含的站点对应的一个站点信息字段的基础上，新增一个与站点对应的站点信息字段。两个与站点信息字段中的部分带宽信息子字段配合指示大于160MHz的带宽中的需要反馈信道状态信息的RU，能够指示站点进行大于160MHz的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更大的带宽传输数据，提高传输效率。两个与站点信息字段中的列数子字段配合指示大于8的列数，能够指示站点进行列数大于8的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更多的流数传输数据，提高传输效率。
该传输装置1600可以为通信装置或接入点，或者该传输装置1600可部署在通信装置或部署在接入点。该传输装置1600的处理单元1601可为处理器，该传输装置1600的发送单元1602可以为收发器。
应理解，上述NAPD帧的传输方法的相关描述也适用于该传输装置1600，此处不再赘述。
请参阅图17，图17为本申请实施例的传输装置的结构示意图。传输装置包括处理单元1701和发送单元1702；
处理单元1701用于生成NDPA帧，NDPA帧包括探测对话令牌字段、特殊站点信息字段和站点信息字段；所述探测对话令牌字段包括帧类别子字段，所述特殊站点信息字段包括帧子类别子字段，所述类型信息承载在所述帧类别子字段和所述帧子类别子字段；所述帧类别子字段指示所述NDPA帧为非HE NDPA帧及非Ranging NDPA帧，所述帧子类别子字段指示所述NDPA帧为EHT NDPA帧；
发送单元1702用于发送NDPA帧。
这样，帧类别子字段和帧子类别子字段结合指示NDPA帧为EHT NDPA帧。EHT NDPA帧能够指示大于160MHz的带宽中的需要反馈信道状态信息的RU，以指示站点进行大于160MHz的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更大的带宽传输数据，提高传输效率。EHT NDPA帧还可以指示大于8的列数，以指示站点进行列数大于8的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更多的流数传输数据，提高传输效率。而且，这样并不需要定义一种新的帧，充分利用MAC帧中剩余可用的类型，节约资源。
该传输装置1700可以为通信装置或接入点，或者该传输装置1700可部署在通信装置或部署在接入点。该传输装置1700的处理单元1701可为处理器，该传输装置1700的发送单元1702可以为收发器。
应理解，上述NAPD帧的传输方法的相关描述也适用于该传输装置1700，此处不再赘述。
请参阅图18，图18为本申请实施例的传输装置的结构示意图。传输装置包括处理单元1801和接收单元1802；
接收单元1802用于接收NDPA帧，所述NDPA帧包括站点信息字段，所述站点信息字段包括指示一个站点的关联标识符AID的AID子字段；所述站点信息字段还包括部分带宽信息子字段和/或列数子字段；所述部分带宽信息子字段指示所述NDPA帧对应的带宽中，所述站点所需反馈信道状态信息的RU，所述列数子字段指示压缩波束成形反馈矩阵的列数；所述NDPA帧对应的带宽大于160MHz，所述列数子字段指示的列数大于8；
处理单元1801用于从所述NDPA帧中获得所需反馈信道状态信息的RU。
这样，NDPA帧的部分带宽信息子字段指示大于160MHz的带宽中的需要反馈信道状态 信息的RU。站点信息字段能够指示站点进行大于160MHz的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更大的带宽传输数据，提高传输效率。列数子字段指示的列数大于8。站点信息字段能够指示站点进行列数大于8的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更多的流数传输数据，提高传输效率。
该传输装置可以为通信装置或站点，或者该传输装置可部署在通信装置或部署在站点。该传输装置1800的处理单元1801可为处理器，该传输装置1800的接收单元1802可以为收发器。
应理解，上述NAPD帧的传输方法的相关描述也适用于该传输装置1800，此处不再赘述。
请参阅图19，图19为本申请实施例的传输装置的结构示意图。传输装置包括处理单元1901和接收单元1902；
接收单元1902用于接收NDPA帧，所述NDPA帧包括两个站点信息字段，所述两个站点信息字段包括指示同一个站点的关联标识符AID的AID子字段；
其中，两个站点信息字段符合以下至少一种：
两个站点信息字段中的部分带宽信息子字段共同指示所述站点所需反馈信道状态信息的RU，所述NDPA帧对应的带宽大于160MHz；或
所述两个站点信息字段中的一个站点信息字段中的列数子字段和另一个站点信息字段中的列数子字段指示压缩波束成形反馈矩阵的列数，所述列数子字段指示的列数大于8；
处理单元1901用于从NDPA帧中获得所需反馈信道状态信息的RU和/或压缩波束成形反馈矩阵的列数。
如此，能够在不改变NDPA帧原本包含的站点对应的一个站点信息字段的基础上，新增一个与站点对应的站点信息字段。两个与站点信息字段中的部分带宽信息子字段配合指示大于160MHz的带宽中的需要反馈信道状态信息的RU，能够指示站点进行大于160MHz的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更大的带宽传输数据，提高传输效率。两个与站点信息字段中的列数子字段配合指示大于8的列数，能够指示站点进行列数大于8的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更多的流数传输数据，提高传输效率。
该传输装置可以为通信装置或站点，或者该传输装置可部署在通信装置或部署在站点。该传输装置1900的处理单元1901可为处理器，该传输装置1900的接收单元1902可以为收发器。
应理解，上述NAPD帧的传输方法的相关描述也适用于该传输装置1900，此处不再赘述。
请参阅图20，图20为本申请实施例的传输装置的结构示意图。传输装置包括处理单元2001和接收单元2002；
接收单元2002用于接收NDPA帧，NDPA帧包括探测对话令牌字段、特殊站点信息字段和站点信息字段；所述探测对话令牌字段包括帧类别子字段，所述特殊站点信息字段包括帧子类别子字段；所述帧类别子字段指示所述NDPA帧为非HE NDPA帧及非Ranging NDPA帧，所述帧子类别子字段指示所述NDPA帧为EHT NDPA帧；
处理单元2001用于从NDPA帧中获得帧类别子字段和帧子类别子字段以确定所述NDPA帧的为EHT NDPA帧。
如此，帧类别子字段和帧子类别子字段结合指示NDPA帧为EHT NDPA帧。EHT NDPA 帧能够指示大于160MHz的带宽中的需要反馈信道状态信息的RU，以指示站点进行大于160MHz的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更大的带宽传输数据，提高传输效率。EHT NDPA帧还可以指示大于8的列数，以指示站点进行列数大于8的带宽的信道探测，并根据信道探测结果反馈波束成形报告，从而能够实现利用更多的流数传输数据，提高传输效率。而且，这样并不需要定义一种新的帧，充分利用MAC帧中剩余可用的类型，节约资源。
该传输装置可以为通信装置或站点，或者该传输装置可部署在通信装置或部署在站点。该传输装置2000的处理单元2001可为处理器，该传输装置2000的接收单元2002可以为收发器。
应理解，上述NAPD帧的传输方法的相关描述也适用于该传输装置2000，此处不再赘述。
本申请实施例还提供了一种计算机可读存储介质，其上存储有计算机程序，该计算机可读存储介质被计算机执行时实现上述任一方法实施例的功能。
本申请实施例还提供了一种计算机程序产品，该计算机程序产品被计算机执行时实现上述任一方法实施例的功能。
本申请实施例还提供一种处理器，用于执行上述任一方法实施例中的可由接入点执行的步骤或用于执行上述任一方法实施例中的可由站点执行的步骤。在执行这些方法的过程中，上述方法中有关发送上述信息和接收上述信息的过程，可以理解为由处理器输出上述信息的过程，以及处理器接收输入的上述信息过程。具体来说，在输出上述信息时，处理器将该上述信息输出给收发器，以便由收发器进行发射。更进一步的，该上述信息在由处理器输出之后，还可能需要进行其他的处理，然后才到达收发器。类似的，处理器接收输入的上述信息时，收发器接收该上述信息，并将其输入处理器。更进一步的，在收发器收到该上述信息之后，该上述信息可能需要进行其他的处理，然后才输入处理器。
如此一来，对于处理器所涉及的发射、发送和接收等操作，如果没有特殊说明，或者，如果未与其在相关描述中的实际作用或者内在逻辑相抵触，则均可以更加一般性的理解为处理器输出和接收、输入等操作，而不是直接由射频电路和天线所进行的发射、发送和接收操作。
在具体实现过程中，上述处理器可以是专门用于执行这些方法的处理器，也可以是执行存储器中的计算机指令来执行这些方法的处理器，例如通用处理器。上述存储器可以为非瞬时性(non-transitory)存储器，例如只读存储器(read only memory，ROM)，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本发明实施例对存储器的类型以及存储器与处理器的设置方式不做限定。
本申请实施例还提供一种芯片系统，该芯片系统包括处理器和接口，用于支持通信传输设备实现上述任一方法实施例中接入点或站点所涉及的功能，例如，确定或处理上述方法中所涉及的数据和信息中的至少一种。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存前述通信装置的必要的信息和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十八方面，本申请提供了一种功能实体，该功能实体用于实现上述NDPA帧的传输方法。
还应理解，本文中涉及的第一、第二、第三、第四以及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的范围。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，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。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、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。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，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)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
本申请实施例方法中的步骤可以根据实际需要进行顺序调整、合并和删减。
本申请实施例装置中的模块可以根据实际需要进行合并、划分和删减。
以上所述，以上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 (34)

  1. 一种传输装置，其特征在于，包括：
    处理单元，用于生成NDPA帧，所述NDPA帧包括站点信息字段，所述站点信息字段包括指示一个站点的关联标识符AID的AID子字段；所述站点信息字段还包括部分带宽信息子字段；所述部分带宽信息子字段指示所述NDPA帧对应的带宽中，所述站点所需反馈信道状态信息的资源单元RU；所述NDPA帧对应的带宽大于160MHz；
    发送单元，用于发送所述NDPA帧。
  2. 一种传输装置，其特征在于，包括：
    接收单元，用于接收NDPA帧，所述NDPA帧包括站点信息字段，所述站点信息字段包括指示一个站点的关联标识符AID的AID子字段；所述站点信息字段还包括部分带宽信息子字段；所述部分带宽信息子字段指示所述NDPA帧对应的带宽中，所述站点所需反馈信道状态信息的资源单元RU；所述NDPA帧对应的带宽大于160MHz；
    处理单元，用于从所述NDPA帧中获得所需反馈信道状态信息的RU。
  3. 根据权利要求1或2所述的装置，其特征在于，所述NDPA帧包括类型信息，所述类型信息指示所述NDPA帧为极高吞吐率EHT NDPA帧。
  4. 根据权利要求3所述的装置，其特征在于，所述NDPA帧还包括探测对话令牌字段和特殊站点信息字段，所述探测对话令牌字段包括帧类别子字段，所述特殊站点信息字段包括帧子类别子字段，所述类型信息承载在所述帧类别子字段和所述帧子类别子字段；
    所述帧类别子字段指示所述NDPA帧为非高吞吐率(high throughput,HE)NDPA帧及非测距Ranging NDPA帧，所述帧子类别子字段指示所述NDPA帧为EHT NDPA帧。
  5. 根据权利要求1-4任一项所述的装置，其特征在于，所述部分带宽信息子字段包括：资源单元起始索引和资源单元偏移量索引，所述资源单元起始索引用于指示所述站点所需反馈信道状态信息的第1个RU，所述资源单元偏移量索引指示所述站点所需反馈信道状态信息的最后一个RU相对于所述第1个RU的偏移量。
  6. 根据权利要求5所述的装置，其特征在于，所述资源单元偏移量索引通过指示所述偏移量相对于基本粒度的倍数，指示所述最后一个RU相对于所述第1个RU的偏移量。
  7. 根据权利要求1-4任一项所述的装置，其特征在于，所述部分带宽信息子字段包括RU指示索引，所述RU指示索引包括频域指示部分和RU指示部分，所述频域指示部分用于指示所述站点所需反馈信道状态信息的RU所在的频域范围，所述RU指示部分用于指示所述所需反馈信道状态信息的RU。
  8. 根据权利要求1-4任一项所述的装置，其特征在于，所述部分带宽信息子字段包括资源单元起始索引和资源单元结束索引，所述资源单元起始索引用于指示所述站点所需反馈信道状态信息的第1个RU，所述资源单元结束索引用于指示所述站点所需反馈信道状态信息的最后一个RU，所述第1个RU为(k 1*n+c 1)*26-tone RU，c 1，k 1为正整数，n为自然数，所述最后一个RU为(k 2*m+c 2)*26-tone RU，c 2，k 2为正整数，m为自然数，所述资源单元起始索引通过指示所述n指示所述第1个RU，所述资源单元结束索引通过指示所述m指示所述最后一个RU，k 1≥2和/或k 2≥2。
  9. 根据权利要求1至8中任一项所述的装置，其特征在于，所述站点信息字段包括4字节。
  10. 根据权利要求1-9任一项所述的装置，其特征在于，所述站点信息字段还包括列数子字段，所述列数子字段指示压缩波束成形反馈矩阵的列数，所述列数子字段指示的列数大于8。
  11. 一种传输装置，其特征在于，包括：
    处理单元，用于点生成NDPA帧，所述NDPA帧包括至少两个站点信息字段，其中两个站点信息字段包括指示同一个站点的关联标识符AID的AID子字段，所述两个站点信息字段中的部分带宽信息子字段指示所述站点所需反馈信道状态信息的RU，所述NDPA帧对应的带宽大于160MHz；
    发送单元，用于发送所述NDPA帧。
  12. 一种传输装置，其特征在于，包括：
    接收单元，用于接收NDPA帧，所述NDPA帧包括至少两个站点信息字段，其中两个站点信息字段包括指示同一个站点的关联标识符AID的AID子字段，所述两个站点信息字段中的部分带宽信息子字段指示所述站点所需反馈信道状态信息的RU，所述NDPA帧对应的带宽大于160MHz；
    处理单元，用于从所述NDPA帧中获得所需反馈信道状态信息的RU。
  13. 根据权利要求11或12所述的装置，其特征在于，所述两个站点信息字段中的一个站点信息字段中的资源单元起始索引和另一个站点信息字段中的资源单元起始索引指示所述NDPA帧对应的带宽中，所述站点所需反馈的信道状态信息的第1个RU，所述一个站点信息字段中的资源单元结束索引和所述另一个站点信息字段中的资源单元结束索引指示所述站点所需反馈的信道状态信息的最后一个RU。
  14. 根据权利要求11-13任一项所述的装置，其特征在于，所述两个站点信息字段中的一个站点信息字段中的列数子字段和另一个站点信息字段中的列数子字段指示压缩波束成形反馈矩阵的列数，所述站点所需反馈的信道状态信息的列数大于8。
  15. 一种空数据分组声明NDPA帧的传输方法，其特征在于，包括：
    接入点生成NDPA帧，所述NDPA帧包括站点信息字段，所述站点信息字段包括指示一个站点的关联标识符AID的AID子字段；所述站点信息字段还包括部分带宽信息子字段；所述部分带宽信息子字段指示所述NDPA帧对应的带宽中，所述站点所需反馈信道状态信息的RU；所述NDPA帧对应的带宽大于160MHz；
    所述接入点发送所述NDPA帧。
  16. 一种NDPA帧的传输方法，其特征在于，包括：
    站点接收NDPA帧，所述NDPA帧包括站点信息字段，所述站点信息字段包括指示一个站点的关联标识符AID的AID子字段；所述站点信息字段还包括部分带宽信息子字段；所述部分带宽信息子字段指示所述NDPA帧对应的带宽中，所述站点所需反馈信道状态信息的RU；所述NDPA帧对应的带宽大于160MHz；
    所述站点从所述NDPA帧中获得所需反馈信道状态信息的RU。
  17. 根据权利要求15或16所述的方法，其特征在于，所述NDPA帧包括类型信息，所述类型信息指示所述NDPA帧为极高吞吐率EHT NDPA帧。
  18. 根据权利要求17所述的方法，其特征在于，所述NDPA帧还包括探测对话令牌字段和特殊站点信息字段，所述探测对话令牌字段包括帧类别子字段，所述特殊站点信息字段包括帧子类别子字段，所述类型信息承载在所述帧类别子字段和所述帧子类别子字段；
    所述帧类别子字段指示所述NDPA帧为非高吞吐率(high throughput,HE)NDPA帧及非测距Ranging NDPA帧，所述帧子类别子字段指示所述NDPA帧为EHT NDPA帧。
  19. 根据权利要求15-18任一项所述的方法，其特征在于，所述部分带宽信息子字段包括：资源单元起始索引和资源单元偏移量索引，所述资源单元起始索引用于指示所述站点所需反馈信道状态信息的第1个RU，所述资源单元偏移量索引指示所述站点所需反馈信道状态信息的最后一个RU相对于所述第1个RU的偏移量。
  20. 根据权利要求19所述的方法，其特征在于，所述资源单元偏移量索引通过指示所述偏移量相对于基本粒度的倍数，指示所述最后一个RU相对于所述第1个RU的偏移量。
  21. 根据权利要求15-18任一项所述的方法，其特征在于，所述部分带宽信息子字段包括RU指示索引，所述RU指示索引包括频域指示部分和RU指示部分，所述频域指示部分用于指示所述站点所需反馈信道状态信息的RU所在的频域范围，所述RU指示部分用于指示所述所需反馈信道状态信息的RU。
  22. 根据权利要求15-18任一项所述的方法，其特征在于，所述部分带宽信息子字段包括资源单元起始索引和资源单元结束索引，所述资源单元起始索引用于指示所述站点所需反馈信道状态信息的第1个RU，所述资源单元结束索引用于指示所述站点所需反馈信道状态信息的最后一个RU，所述第1个RU为(k 1*n+c 1)*26-tone RU，c 1，k 1为正整数，n为自然数，所述最后一个RU为(k 2*m+c 2)*26-tone RU，c 2，k 2为正整数，m为自然数，所述资源单元起始索引通过指示所述n指示所述第1个RU，所述资源单元结束索引通过指示所述m指示所述最后一个RU，k 1≥2和/或k 2≥2。
  23. 根据权利要求15至22中任一项所述的方法，其特征在于，所述站点信息字段包括4字节。
  24. 根据权利要求15-23任一项所述的方法，其特征在于，所述站点信息字段还包括列数子字段，所述列数子字段指示压缩波束成形反馈矩阵的列数，所述列数子字段指示的列数大于8。
  25. 一种NDPA帧的传输方法，其特征在于，包括：
    接入点生成NDPA帧，所述NDPA帧包括至少两个站点信息字段，其中两个站点信息字段包括指示同一个站点的关联标识符AID的AID子字段，所述两个站点信息字段中的部分带宽信息子字段指示所述站点所需反馈信道状态信息的RU，所述NDPA帧对应的带宽大于160MHz；
    所述接入点发送所述NDPA帧。
  26. 一种NDPA帧的传输方法，其特征在于，包括：
    站点接收NDPA帧，所述NDPA帧包括至少两个站点信息字段，其中两个站点信息字段包括指示同一个站点的关联标识符AID的AID子字段，所述两个站点信息字段中的部分带宽信息子字段指示所述站点所需反馈信道状态信息的RU，所述NDPA帧对应的带宽大于160MHz；
    所述站点从所述NDPA帧中获得所需反馈信道状态信息的RU。
  27. 根据权利要求25或26所述的方法，其特征在于，所述两个站点信息字段中的一个站点信息字段中的资源单元起始索引和另一个站点信息字段中的资源单元起始索引指示所述NDPA帧对应的带宽中，所述站点所需反馈的信道状态信息的第1个RU，所述一个站点信息字段中的资源单元结束索引和所述另一个站点信息字段中的资源单元结束索引指示所述站点 所需反馈的信道状态信息的最后一个RU。
  28. 根据权利要求25-27任一项所述的方法，其特征在于，所述两个站点信息字段中的一个站点信息字段中的列数子字段和另一个站点信息字段中的列数子字段指示压缩波束成形反馈矩阵的列数，所述站点所需反馈的信道状态信息的列数大于8。
  29. 一种通信装置，包括：处理器和存储器，所述存储器用于存储指令，当所述处理器运行所述指令时，以使得所述通信装置执行权利要求15至28中任一项所述的方法。
  30. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机指令，所述计算机指令指示通信设备执行权利要求15至28中任一项所述的方法。
  31. 一种计算机程序产品，其特征在于，所述计算机程序产品包括计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行权利要求15至28中任一项所述的方法。
  32. 一种处理器，用于执行权利要求15至28中任一项所述的方法。
  33. 一种芯片系统，所述芯片系统包括处理器和接口，用于支持通信传输设备实现权利要求15至28中任一项所述的方法。
  34. 一种功能实体，所述功能实体用于实现权利要求15至28中任一项所述的方法。
PCT/CN2021/093950 2020-05-22 2021-05-14 空数据分组声明帧的传输方法及相关装置 WO2021233233A1 (zh)

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KR1020227045085A KR20230014750A (ko) 2020-05-22 2021-05-14 널 데이터 패킷 공지 프레임 송신 방법 및 관련된 장치
AU2021277365A AU2021277365A1 (en) 2020-05-22 2021-05-14 Null data packet announcement frame transmission method and related apparatus
BR112022023636A BR112022023636A2 (pt) 2020-05-22 2021-05-14 Método de transmissão de quadro de anúncio de pacote de dados nulo e aparelho relacionado
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