Communication method and device

Abstract

The invention provides a communication method and device, relates to the technical field of communication, and can simplify the realization of signal transmission of communication equipment on a low-frequency band and a high-frequency band, reduce the complexity and improve the communication performance. The method comprises: an access point device can generate a PPDU; and the PPDU is sent to the station equipment on the high-frequency channel. Wherein the PPDU may include a first portion; the first part is modulated based on OFDM; the first part is used for beam scanning, and the subcarriers, used for beam scanning training, of the first part comprise m subcarriers in every N subcarriers; n is an integer larger than 1, and m is a positive integer smaller than N.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to communication methods and apparatus. Background Technology

[0002] In communication systems, signals transmitted in the low-frequency band can be transmitted using orthogonal frequency division multiplexing (OFDM) modulation, while signals transmitted in the high-frequency band can be transmitted using signal carrier (SC) modulation. When a communication device supports signal transmission in both the low-frequency and high-frequency bands, two sets of modulation modes need to be configured, increasing the implementation complexity.

[0003] Therefore, how to simplify the implementation of signal transmission in communication devices at low and high frequencies and reduce complexity has become an urgent problem to be solved. Summary of the Invention

[0004] This application provides a communication method and apparatus that can simplify the implementation of signal transmission in low-frequency and high-frequency bands, reduce complexity, and thereby improve communication performance.

[0005] Firstly, a communication method is provided, which can be executed by an access point device. Unless otherwise specified, "access point device" in this application can refer to the access point device itself, a component within the access point device (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the functions of the access point device. The method includes: the access point device generating a physical protocol data unit (PPDU); and transmitting the PPDU on a high-frequency channel. The PPDU includes a first part; the first part is based on OFDM modulation; the first part is used for beam scanning, and the subcarriers used for beam scanning training in the first part include m subcarriers out of every N subcarriers; N is an integer greater than 1, and m is a positive integer less than N.

[0006] Based on this scheme, the access point device performs OFDM modulation on the first part. Since the subcarriers used for beam scanning training in the first part include m subcarriers out of every N subcarriers, based on the power spectral density limitation, the power can be concentrated on the subcarriers used for beam scanning training in the first part, which can improve the power on the subcarriers used for beam scanning training in the first part, thereby effectively improving the signal-to-noise ratio (SNR) on the subcarriers used for beam scanning training in the first part, and improving the reliability of communication.

[0007] In addition, by reusing low-frequency OFDM modulation modes, access point equipment can achieve beam measurement and communication with site equipment at both high and low frequencies using a single modulation mode. This enables high- and low-frequency integrated design reuse, thereby reducing the complexity of beam measurement and communication between access point equipment in both low and high frequency bands.

[0008] Furthermore, by carrying the first part in the PPDU and using it for beam scanning, a reliable and low-complexity beam scanning method can be provided for the establishment of high-frequency links, which can simplify the implementation of beam scanning in high-frequency channels.

[0009] One possible implementation is that the first part of the subcarriers used for beam scanning training are based on a symmetrical distribution of the central subcarrier.

[0010] Based on this possible implementation, the time period of the first part in the time domain can be m / N of the OFDM symbol period. That is, the first part can form a repeating signal in the time domain, which enables the site equipment to detect the scanning beam corresponding to the first part through simple time-domain correlation processing, so as to determine the received signal strength indicator (RSSI) of the scanning beam corresponding to the first part, thereby improving the detection sensitivity.

[0011] One possible implementation includes the following: identification information of the access point device, information on the number of remaining scanning beams, beam scanning feedback time information, beam identification information, beam sector numbering information, or timing information; wherein the beam scanning feedback time information is used to indicate the time when the site device feeds back the beam measurement report; the timing information is used to indicate one or more of the following: the sequence number of the first part among the multiple first parts included in the first PPDU, or the number of other first parts in the PPDU that are located after the first part.

[0012] Based on this possible implementation, the access point device can indicate one or more of the above information to the site device through the first part.

[0013] The first part may include the identification information of the access point device, which enables the site device to identify the access point device corresponding to the first part it receives, and then send the corresponding beam measurement report to the corresponding access point device.

[0014] The first part can include information on the number of remaining scanning beams. This information allows the site device to determine whether there are any remaining scanning beams and the number of remaining scanning beams. In turn, it can determine whether the access point device will continue beam scanning, which can improve the efficiency of interaction between the site device and the access point device. At the same time, it can minimize the situation where the access point device ends beam scanning while the site device is still waiting to determine the RSSI of the scanning beam, thereby reducing resource consumption, improving resource utilization, and reducing the power consumption of the site device.

[0015] The first part can include beam scanning feedback time information, enabling the site equipment to determine the time for feeding back the beam measurement report and send it to the access point equipment within that time. This minimizes interference from other signals during beam measurement report transmission, improving communication reliability. Additionally, the access point equipment can also receive beam measurement reports from the site equipment within the corresponding time period, effectively improving the interaction efficiency between the site and access point equipment. Furthermore, the access point equipment can receive beam measurement reports within a defined time frame, instead of waiting indefinitely, effectively reducing resource consumption, improving resource utilization, and lowering power consumption.

[0016] The first part can include beam identification information, which enables the site equipment to determine the identifier of the scanning beam corresponding to the received first part based on the beam identification information. When reporting the beam measurement report, the site equipment can report the identifier of the scanning beam and the RSSI of the scanning beam. Compared with the site equipment reporting the RSSI of the scanning beam sequentially when reporting the beam measurement report (i.e. without carrying the identification information of the scanning beam), the access point equipment can more accurately determine the RSSI corresponding to different scanning beams, which can improve the accuracy of identifying the scanning beam.

[0017] The first part can include beam sector numbering information, allowing site equipment to determine the beam sector number based on this information. When reporting beam measurement reports, the site equipment can report the beam sector number and the RSSI of the scanned beam. Correspondingly, the access point equipment can determine the scanned beam corresponding to the beam sector number, and thus determine the RSSI of that scanned beam. Compared to site equipment sequentially reporting the RSSI of the scanned beam when reporting beam measurement reports (i.e., without carrying beam sector numbering information), this method allows site equipment to include beam sector numbering information in the beam measurement report, enabling access point equipment to more accurately determine the RSSI corresponding to different scanned beams and improving the accuracy of scanned beam determination.

[0018] The first part can include timing information, which enables the site device to determine whether there are other first parts after the currently received first part. This allows the access point device to determine whether to continue beam scanning (i.e., if other first parts exist, the access point device continues beam scanning; if no other first parts exist, the access point device ends beam scanning). This can improve the efficiency of interaction between the site device and the access point device, and at the same time, it can avoid situations where the access point device ends beam scanning while the site device is still waiting to detect the scanning beam. This can reduce resource consumption, improve resource utilization, and reduce the power consumption of the site device.

[0019] One possible implementation is that the first part includes an ultra-high reliability (UHR) training (TRN) field; or, the first part includes a UHR long training field (LTF) field; or, the first part includes a UHR-LTF field and a UHR-data field; or, the first part includes a UHR-short training field (STF) field, a UHR-LTF field, and a UHR-data field.

[0020] Based on this possible implementation, several feasible solutions are provided for the implementation of the first part.

[0021] One possible implementation is that multiple subcarriers in the first part used for beam scanning training are used to modulate the same information.

[0022] Based on this possible implementation, the same information can be modulated onto multiple subcarriers and repeated to improve communication reliability.

[0023] One possible implementation is that the PPDU includes one or more first parts, and the scanning beam corresponding to the one or more first parts is determined according to the corresponding column of the unitary matrix.

[0024] Based on this possible implementation, the scan matrix corresponding to different first parts can be determined according to different columns of the unitary matrix, which can reduce signaling overhead.

[0025] In one possible implementation, the PPDU further includes a first field that includes indication information; the first field precedes the first part; or, before transmitting the PPDU, the access point device transmits indication information on a low-frequency channel; wherein the indication information is used to indicate m and N.

[0026] Based on this possible implementation, compared to transmitting the indication information on a low-frequency channel, the indication information is located in the first field of the PPDU, which can accurately indicate the m and N associated with the first part of the PPDU, thus improving the reliability of communication. Compared to transmitting the indication information in the first field of the PPDU, transmitting the indication information on a low-frequency channel can reduce the modification of the PPDU format and reduce the implementation complexity.

[0027] One possible implementation is that, before sending the PPDU, the access point device sends a first frame on a low-frequency channel; the first frame includes configuration information for a first part; or, the PPDU also includes a first field, which includes configuration information for the first part; wherein the configuration information for the first part is used to indicate one or more of the following: the length of the first part, or the number of the first parts.

[0028] Based on this possible implementation, two feasible schemes are provided for transmitting the configuration information in the first part, enabling the site equipment to determine the first part of the PPDU. Compared to transmitting the configuration information in the first part on a low-frequency channel, the configuration information in the first part is located in the first field of the PPDU, which can accurately indicate the configuration information in the first part and improve communication reliability. Compared to the configuration information in the first field of the PPDU, transmitting the configuration information in the first part on a low-frequency channel can reduce the modification of the PPDU format and reduce implementation complexity.

[0029] One possible implementation is that the first field is the UHR-signal (SIG) field.

[0030] Based on this possible implementation, a feasible solution is provided for the implementation of the first field.

[0031] One possible implementation is that the first frame also includes information about the time interval of the beam scan.

[0032] Based on this possible implementation, the access point device can indicate the time interval for detecting the scanning beam to the site device, enabling the site device to receive the first part based on the scanning beam within the time interval of the beam scanning. This allows the site device to wait for the detection of the scanning beam within a defined time period, effectively reducing resource consumption and power consumption of the site device.

[0033] One possible implementation is that, before the access point device sends a PPDU on the high-frequency channel, a second frame is sent on the low-frequency channel; wherein the second frame is used to indicate a first bandwidth on the high-frequency channel used for beam scanning training, the size of which is less than or equal to a preset threshold.

[0034] Based on this possible implementation, narrowband beam scanning can be performed, which can improve receiver sensitivity, thereby enabling better beam scanning and improving communication reliability.

[0035] One possible implementation is that, on a low-frequency channel, the access point device sends a third frame; wherein the third frame is used to indicate a second bandwidth on a high-frequency channel used for beam scanning training; the size of the second bandwidth is greater than a preset threshold.

[0036] Based on this potential implementation, broadband beam scanning can be performed to solve the problem of selective fading in the channel frequency domain, thereby improving communication reliability.

[0037] One possible implementation is that the access point device receives beam measurement reports on a low-frequency channel.

[0038] Based on this possible implementation, a feasible solution is provided for access point equipment to obtain beam measurement reports.

[0039] Secondly, a communication method is provided, which can be executed by a site device. Unless otherwise specified, "site device" in this application can refer to the site device itself, a component within the site device (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the site device's functions. The method includes: the site device receiving a PPDU on a high-frequency channel; and determining a beam measurement report based on the PPDU. The PPDU includes a first part; the first part is based on OFDM modulation; the first part is used for beam scanning, and the subcarriers used for beam scanning training in the first part include m subcarriers out of every N subcarriers; N is an integer greater than 1, and m is a positive integer less than N.

[0040] Based on this scheme, since the first part of the subcarriers used for beam scanning training includes m subcarriers out of every N subcarriers, based on the power spectral density limitation, the power can be concentrated on the first part of the subcarriers used for beam scanning training, which can improve the power on the first part of the subcarriers used for beam scanning training, thereby effectively improving the signal-to-noise ratio on the first part of the subcarriers used for beam scanning training and improving the reliability of communication.

[0041] In addition, by reusing low-frequency OFDM modulation modes, access point equipment can achieve beam measurement and communication with site equipment at both high and low frequencies using a single modulation mode. This enables high- and low-frequency integrated design reuse, thereby reducing the complexity of beam measurement and communication between access point equipment in both low and high frequency bands.

[0042] Furthermore, by carrying the first part in the PPDU and using it for beam scanning, a reliable and low-complexity beam scanning method can be provided for establishing high-frequency links, simplifying the implementation of beam scanning in high-frequency channels. One possible implementation is that the subcarriers used for beam scanning training in the first part are symmetrically distributed based on the center subcarrier.

[0043] Based on this possible implementation, the time period of the first part in the time domain can be m / N of the OFDM symbol period. That is, the first part can form a repeating signal in the time domain. The site equipment can detect the scanning beam corresponding to the first part through simple time-domain correlation processing to determine the received signal strength indicator (RSSI) of the scanning beam corresponding to the first part, thereby improving the detection sensitivity.

[0044] One possible implementation includes the following: identification information of the access point device, information on the number of remaining scanning beams, beam scanning feedback time information, beam identification information, beam sector numbering information, or timing information; wherein the beam scanning feedback time information is used to indicate the time when the site device feeds back the beam measurement report; the timing information is used to indicate one or more of the following: the sequence number of the first part among the multiple first parts included in the first PPDU, or the number of other first parts in the PPDU that are located after the first part.

[0045] Based on this possible implementation, the first part may include the identification information of the access point device. The site device can determine the access point device corresponding to the received first part, and then send the corresponding beam measurement report to the corresponding access point device.

[0046] The first part can include information on the number of remaining scanning beams. The site device can determine whether there are any remaining scanning beams and the number of remaining scanning beams based on the remaining scanning beam information, and then determine whether the access point device will continue to perform beam scanning. This can improve the efficiency of interaction between the site device and the access point device. At the same time, it can avoid situations where the access point device ends beam scanning while the site device is still waiting to determine the RSSI of the scanning beam, which can reduce resource consumption, improve resource utilization, and reduce the power consumption of the site device.

[0047] The first part can include beam scan feedback time information. The site device can determine the time to send the beam measurement report and transmit it to the access point device within that time. This minimizes interference from other signals during beam measurement report transmission, improving communication reliability. Additionally, the access point device can also receive beam measurement reports from the site device within the corresponding time period, effectively improving the interaction efficiency between the site and access point devices. Furthermore, the access point device can receive beam measurement reports within a defined time frame, instead of waiting indefinitely, effectively reducing resource consumption, improving resource utilization, and lowering power consumption.

[0048] The first part may include beam identification information. The site equipment can determine the identifier of the scanning beam corresponding to the received first part based on the beam identification information. When reporting the beam measurement report, the site equipment can report the identifier of the scanning beam and the RSSI of the scanning beam. Compared with the site equipment reporting the RSSI of the scanning beam sequentially when reporting the beam measurement report (i.e. without carrying the identification information of the scanning beam), the access point equipment can more accurately determine the RSSI corresponding to different scanning beams, which can improve the accuracy of determining the scanning beam.

[0049] The first part can include beam sector numbering information. The site equipment can determine the beam sector number based on this information. When reporting a beam measurement report, it can report the beam sector number and the RSSI of the scanned beam. Correspondingly, the access point equipment can determine the scanned beam corresponding to the beam sector number, and thus determine the RSSI of that scanned beam. Compared to site equipment sequentially reporting the RSSI of the scanned beam when reporting a beam measurement report (i.e., without carrying beam sector numbering information), allowing the site equipment to include beam sector numbering information in the report enables the access point equipment to more accurately determine the RSSI corresponding to different scanned beams, thus improving the accuracy of beam identification.

[0050] The first part may include timing information. The site device can determine whether there are other first parts after the currently received first part based on the timing information, thereby determining whether the access point device will continue beam scanning (i.e., if there are other first parts, the access point device continues beam scanning; if there are no other first parts, the access point device ends beam scanning). This can improve the efficiency of interaction between the site device and the access point device, and at the same time, it can avoid the situation where the access point device ends beam scanning while the site device is still waiting to detect the scanning beam. This can reduce resource consumption, improve resource utilization, and reduce the power consumption of the site device.

[0051] One possible implementation is that the first part includes a UHR-TRN field; or, the first part includes a UHR-LTF field; or, the first part includes a UHR-LTF field and a UHR-data field; or, the first part includes a UHR-STF field, a UHR-LTF field, and a UHR-data field.

[0052] Based on this possible implementation, several feasible solutions are provided for the implementation of the first part.

[0053] One possible implementation is that multiple subcarriers in the first part used for beam scanning training are used to modulate the same information.

[0054] Based on this possible implementation, the same information can be modulated onto multiple subcarriers and repeated to improve communication reliability.

[0055] One possible implementation is that the PPDU includes one or more first parts, and the scanning beam corresponding to the one or more first parts is determined according to the corresponding column of the unitary matrix.

[0056] Based on this possible implementation, the scan matrix corresponding to different first parts can be determined according to different columns of the unitary matrix, which can reduce signaling overhead.

[0057] In one possible implementation, the PPDU further includes a first field that includes indication information; the first field is located before the first part; or, before receiving the PPDU, the site equipment receives the indication information on a low-frequency channel; wherein the indication information is used to indicate m and N; and the subcarriers for beam scanning training in the first part are determined based on the indication information.

[0058] Based on this possible implementation, compared to transmitting the indication information on a low-frequency channel, the indication information is located in the first field of the PPDU, which can accurately indicate the m and N associated with the first part of the PPDU, thus improving the reliability of communication. Compared to transmitting the indication information in the first field of the PPDU, transmitting the indication information on a low-frequency channel can reduce the modification of the PPDU format and reduce the implementation complexity.

[0059] One possible implementation is that, before receiving the PPDU, the site equipment receives a first frame on a low-frequency channel; the first frame includes configuration information for a first part; or, the PPDU includes a first field, which includes the configuration information for the first part; based on the configuration information for the first part, the first part of the PPDU used for beam measurement training is determined. The configuration information for the first part indicates one or more of the following: the length of the first part, or the number of first parts.

[0060] Based on this possible implementation, two feasible schemes are provided for the transmission of the configuration information in the first part, allowing the site equipment to determine the first part of the PPDU. Compared to transmitting the configuration information in the first part on a low-frequency channel, transmitting it in the first field of the PPDU can accurately indicate the configuration information in the first part, thus improving communication reliability. Furthermore, compared to transmitting the configuration information in the first field of the PPDU, transmitting it on a low-frequency channel reduces modifications to the PPDU format and lowers implementation complexity.

[0061] One possible implementation is that the first field is the UHR-SIG field.

[0062] Based on this possible implementation, a feasible solution is provided for the implementation of the first field.

[0063] One possible implementation is that the first frame also includes information about the time interval of the beam scan.

[0064] Based on this possible implementation, the site equipment can determine the time interval for receiving the first part according to the time interval information of beam scanning. By receiving the first part based on the scanning beam within the time interval of beam scanning, the site equipment can wait to detect the scanning beam within a certain time period, which can effectively reduce resource consumption and reduce the power consumption of the site equipment.

[0065] One possible implementation involves receiving a PPDU on a high-frequency channel, and the site equipment receiving a second frame on a low-frequency channel; and receiving a PPDU on a first bandwidth of the high-frequency channel. The second frame indicates a first portion of the high-frequency channel used for beam scanning training, and the size of the first bandwidth is less than or equal to a preset threshold.

[0066] Based on this possibility, narrowband beam scanning can be performed, which can improve receiver sensitivity, thereby enabling better beam scanning and improving communication reliability.

[0067] One possible implementation involves receiving a third frame on a low-frequency channel and receiving a PPDU on the second bandwidth of a high-frequency channel. The third frame indicates the second bandwidth on the high-frequency channel used for beam scanning training, and the size of the second bandwidth is greater than a preset threshold.

[0068] Based on this possibility, broadband beam scanning can be performed to solve the problem of selective fading in the channel frequency domain, thereby improving the reliability of communication.

[0069] One possible implementation is that the site equipment transmits beam measurement reports on a low-frequency channel.

[0070] Based on this possibility, a feasible solution is provided for sending beam measurement reports to site equipment.

[0071] Thirdly, a communication method is provided, which can be executed by an access point device. Unless otherwise specified, "access point device" in this application can refer to the access point device itself, a component within the access point device (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the functions of the access point device. The method includes: the access point device generating a PPDU; and transmitting the PPDU on a high-frequency channel. The PPDU's frame format is direct sequence spread spectrum (DSSS) format, the PPDU is based on OFDM modulation, and the PPDU is used for beam scanning.

[0072] Based on this scheme, the access point device can perform OFDM modulation on DSSS format PPDUs. That is, the access point device can reuse the low-frequency OFDM modulation mode to perform OFDM modulation on DSSS format PPDUs on high-frequency channels. The access point device can realize beam measurement and communication with the site equipment at high and low frequencies through a set of modulation modes. It can realize high and low frequency integrated design reuse, thereby reducing the implementation complexity of beam measurement and communication of the access point device in low and high frequency bands.

[0073] One possible implementation is that the PPDU includes one or more of the following: access point device identification information, remaining scan beam count information, beam scan feedback time information, beam identification information, beam sector numbering information, or timing information; wherein, the beam scan feedback time information is used to indicate the time when the site device feeds back the beam measurement report; the timing information is used to indicate one or more of the following: the sequence number of the PPDU among multiple PPDUs sent by the access point device, or the number of other PPDUs following the PPDU among multiple PPDUs sent by the access point device.

[0074] Based on this possible implementation, the PPDU may include one or more of the above-mentioned information.

[0075] The PPDU can include beam scan feedback time information, enabling the site equipment to determine the time to send the beam measurement report and transmit it to the access point equipment within that time. This minimizes interference from other signals during beam measurement report transmission, improving communication reliability. Furthermore, the access point equipment can also receive beam measurement reports from the site equipment within a corresponding time period, effectively improving the interaction efficiency between the two devices. Simultaneously, the access point equipment can receive beam measurement reports within a defined time frame, avoiding continuous waiting, thus reducing resource consumption, improving resource utilization, and lowering power consumption.

[0076] The PPDU can include beam identification information, which allows the site equipment to determine the identifier of the scanning beam corresponding to the received PPDU. When reporting a beam measurement report, the site equipment can report the identifier of the scanning beam and the RSSI of the scanning beam. Compared with the site equipment reporting the RSSI of the scanning beam sequentially when reporting a beam measurement report (i.e., without carrying the identification information of the scanning beam), the access point equipment can more accurately determine the RSSI corresponding to different scanning beams, which can improve the accuracy of identifying the scanning beam.

[0077] The PPDU can include beam sector numbering information, allowing site equipment to determine the beam sector number based on this information. When reporting beam measurement reports, it can report the beam sector number and the RSSI of the scanned beam. Correspondingly, access point equipment can determine the scanned beam corresponding to the beam sector number, and thus determine the RSSI of that scanned beam. Compared to site equipment sequentially reporting the RSSI of the scanned beam when reporting beam measurement reports (i.e., without carrying beam sector numbering information), allowing site equipment to include beam sector numbering information in the beam measurement report enables access point equipment to more accurately determine the RSSI corresponding to different scanned beams, thus improving the accuracy of scanned beam identification.

[0078] The PPDU can include timing information, which allows the site device to determine whether there are other PPDUs after the currently received PPDU. This allows the access point device to determine whether to continue beam scanning (i.e., if there are other PPDUs, the access point device continues beam scanning; if there are no other PPDUs, the access point device ends beam scanning). This can improve the efficiency of interaction between the site device and the access point device, and at the same time, it can avoid situations where the access point device ends beam scanning while the site device is still waiting to detect the scanning beam. This can reduce resource consumption, improve resource utilization, and reduce the power consumption of the site device.

[0079] One possible implementation is that the scanning beam corresponding to one or more PPDUs is determined according to the corresponding column of the unitary matrix.

[0080] Based on this possible implementation, the scan matrix corresponding to different first parts can be determined according to different columns of the unitary matrix, which can reduce signaling overhead.

[0081] One possible implementation is that, on a high-frequency channel, before the access point device sends the PPDU, it sends indication information on a low-frequency channel; wherein the indication information is used to indicate that the frame format of the PPDU is DSSS format.

[0082] Based on this possible implementation, a feasible solution is provided for indicating the frame format of PPDU.

[0083] One possible implementation is that, on a high-frequency channel, before the access point device transmits a PPDU, it transmits a first frame on a low-frequency channel; wherein the first frame includes one or more of the following: configuration information of the PPDU, or time interval information of beam scanning, and the configuration information of the PPDU is used to indicate one or more of the following: the length of the PPDU, or the number of PPDUs.

[0084] Based on this possible implementation, a feasible solution is provided for indicating the configuration information of the PPDU and the time interval information of beam scanning.

[0085] One possible implementation is that, before the access point device sends the PPDU on the high-frequency channel, it sends a second frame on the low-frequency channel; wherein the second frame is used to indicate the first bandwidth of the PPDU for beam scanning training on the high-frequency channel, and the size of the first bandwidth is less than or equal to a preset threshold.

[0086] Based on this possible implementation, narrowband beam scanning can be performed, which can improve receiver sensitivity, thereby enabling better beam scanning and improving communication reliability.

[0087] One possible implementation is that the access point device transmits a third frame on a low-frequency channel; wherein the third frame is used to indicate the second bandwidth of the PPDU for beam scanning training on a high-frequency channel; the size of the second bandwidth is greater than a preset threshold.

[0088] Based on this potential implementation, broadband beam scanning can be performed to solve the problem of selective fading in the channel frequency domain, thereby improving communication reliability.

[0089] One possible implementation is that the access point device receives beam measurement reports on a low-frequency channel.

[0090] Based on this possible implementation, a feasible solution is provided for access point equipment to obtain beam measurement reports.

[0091] Fourthly, a communication method is provided, which can be executed by a site device. Unless otherwise specified, "site device" in this application can refer to the site device itself, a component within the site device (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the site device's functions. The method includes: receiving Physical Layer Protocol Data Units (PPDUs) on a high-frequency channel; and determining a beam measurement report based on the PPDUs. The PPDUs are in Direct Sequence Spread Spectrum (DSSS) frame format, based on OFDM modulation, and used for beam scanning.

[0092] Based on this scheme, access point equipment can perform OFDM modulation on DSSS format PPDUs. That is, access point equipment can reuse low-frequency OFDM modulation mode to perform OFDM modulation on DSSS format PPDUs on high-frequency channels. Access point equipment can achieve beam measurement and communication with site equipment at high and low frequencies through a set of modulation modes. It can realize high and low frequency integrated design reuse, thereby reducing the implementation complexity of beam measurement and communication of access point equipment in low and high frequency bands.

[0093] One possible implementation is that the PPDU includes one or more of the following: access point device identification information, remaining scan beam count information, beam scan feedback time information, beam identification information, beam sector numbering information, or timing information; wherein, the beam scan feedback time information is used to indicate the time when the site device feeds back the beam measurement report; the timing information is used to indicate one or more of the following: the sequence number of the PPDU among multiple PPDUs sent by the access point device, or the number of other PPDUs following the PPDU among multiple PPDUs sent by the access point device.

[0094] Based on this possible implementation, the PPDU can include information on the number of remaining scanning beams. The site device can determine whether there are any remaining scanning beams and the number of remaining scanning beams based on this information, and thus determine whether the access point device will continue beam scanning. This can improve the efficiency of interaction between the site device and the access point device. At the same time, it can minimize the situation where the access point device ends beam scanning while the site device is still waiting to determine the RSSI of the scanning beam, thereby reducing resource consumption, improving resource utilization, and reducing the power consumption of the site device.

[0095] The PPDU can include beam scan feedback time information. The site device can determine the time to send the beam measurement report and transmit it to the access point device within that time. This minimizes interference from other signals during beam measurement report transmission, improving communication reliability. Furthermore, the access point device can also receive beam measurement reports from the site device within the corresponding time period, effectively improving the interaction efficiency between the site and access point devices. Simultaneously, the access point device can receive beam measurement reports within a defined time frame, instead of waiting indefinitely, effectively reducing resource consumption, improving resource utilization, and lowering power consumption.

[0096] PPDU can include beam identification information. The site equipment can determine the identifier of the scanning beam corresponding to the received PPDU based on the beam identification information. When reporting beam measurement reports, it can report the identifier of the scanning beam and the RSSI of the scanning beam. Compared with the site equipment reporting the RSSI of the scanning beam sequentially when reporting beam measurement reports (i.e. without carrying the identification information of the scanning beam), the access point equipment can more accurately determine the RSSI corresponding to different scanning beams, which can improve the accuracy of identifying the scanning beam.

[0097] A PPDU can include beam sector numbering information. Site equipment can determine the beam sector number based on this information. When reporting beam measurement reports, it can report both the beam sector number and the RSSI of the scanned beam. Correspondingly, access point equipment can determine the scanned beam corresponding to the beam sector number, and thus determine the RSSI of that scanned beam. Compared to site equipment sequentially reporting the RSSI of the scanned beam when reporting beam measurement reports (i.e., without carrying beam sector numbering information), allowing site equipment to include beam sector numbering information in the report enables access point equipment to more accurately determine the RSSI corresponding to different scanned beams, improving the accuracy of scanned beam identification.

[0098] PPDUs can include timing information. Based on the timing information, the site device can determine whether there are other PPDUs after the currently received PPDU, thereby determining whether the access point device will continue beam scanning (i.e., if there are other PPDUs, the access point device continues beam scanning; if there are no other PPDUs, the access point device ends beam scanning). This can improve the efficiency of interaction between the site device and the access point device, and at the same time, it can avoid the situation where the access point device ends beam scanning while the site device is still waiting to detect the scanning beam. This can reduce resource consumption, improve resource utilization, and reduce the power consumption of the site device.

[0099] One possible implementation is that the scanning beam corresponding to one or more PPDUs is determined according to the corresponding column of the unitary matrix.

[0100] Based on this possible implementation, the scan matrix corresponding to different first parts can be determined according to different columns of the unitary matrix, which can reduce signaling overhead.

[0101] One possible implementation involves receiving indication information on a low-frequency channel before receiving the PPDU on a high-frequency channel; and determining the frame format of the PPDU based on the indication information. The indication information indicates that the PPDU's frame format is DSSS format.

[0102] Based on this possible implementation, a feasible solution is provided for determining the frame format of PPDU for site equipment.

[0103] One possible implementation is that the site equipment receives a first frame on a low-frequency channel before receiving a PPDU on a high-frequency channel; wherein the first frame includes one or more of the following: configuration information of the PPDU, or time interval information of beam scanning, and the configuration information of the PPDU is used to indicate one or more of the following: the length of the PPDU, or the number of PPDUs.

[0104] Based on this possible implementation, a feasible solution is provided for determining the configuration information of the PPDU and the time interval information of beam scanning for site equipment.

[0105] One possible implementation is that the site equipment receives a second frame on a low-frequency channel and a PPDU on a second bandwidth of a high-frequency channel. The second frame indicates the first bandwidth of the PPDU on the high-frequency channel used for beam scanning training; the size of the second bandwidth is less than or equal to a preset threshold.

[0106] Based on this possible implementation, narrowband beam scanning can be performed, which can improve receiver sensitivity, thereby enabling better beam scanning and improving communication reliability.

[0107] One possible implementation is that the site equipment receives a third frame on a low-frequency channel and a PPDU on a second bandwidth of a high-frequency channel. The third frame indicates the second bandwidth of the PPDU on the high-frequency channel used for beam scanning training; the size of the second bandwidth is greater than a preset threshold.

[0108] Based on this potential implementation, broadband beam scanning can be performed to solve the problem of selective fading in the channel frequency domain, thereby improving communication reliability.

[0109] One possible implementation is that the site equipment transmits beam measurement reports on a low-frequency channel.

[0110] Based on this possible implementation, a feasible solution is provided for sending beam measurement reports to site equipment.

[0111] Fifthly, a communication apparatus is provided for implementing the method of the first aspect. The communication apparatus may be the access point device described in the first aspect, or a device or component included in the access point device, such as a chip.

[0112] The communication device includes modules, units, or means that implement the methods described above. These modules, units, or means can be implemented in hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the functions described above.

[0113] In some possible implementations, the communication device may include a processing module and a transceiver module. The transceiver module may include a transmitting module and a receiving module, respectively used to implement the transmitting and receiving functions of the first aspect and any possible implementation thereof. The processing module may be used to implement the processing functions of the first aspect and any possible implementation thereof. For example, the processing module is used to generate a PPDU; wherein the PPDU includes a first part; the first part is based on OFDM modulation; the first part is used for beam scanning, and the subcarriers used for beam scanning training in the first part include m subcarriers out of every N subcarriers; N is an integer greater than 1, and m is a positive integer less than N; the transceiver module is used to transmit the PPDU on a high-frequency channel.

[0114] Optionally, the transceiver module and processing module of the communication device in the fifth aspect may also perform the corresponding functions in the first aspect or any possible implementation of the first aspect, as detailed in the method examples, and the beneficial effects that can be achieved can also be found in the foregoing related content.

[0115] A sixth aspect provides a communication apparatus for implementing the method of the second aspect described above. The communication apparatus may be the site equipment described in the second aspect, or a device or component included in the site equipment, such as a chip.

[0116] The communication device includes modules, units, or means that implement the methods described above. These modules, units, or means can be implemented in hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the functions described above.

[0117] In some possible implementations, the communication device may include a processing module and a transceiver module. The transceiver module may include a transmitting module and a receiving module, respectively used to implement the transmitting and receiving functions of the second aspect described above and any possible implementation thereof. The processing module may be used to implement the processing functions of the second aspect described above and any possible implementation thereof. For example, the transceiver module is used to receive a PPDU on a high-frequency channel; wherein the PPDU includes a first part; the first part is based on OFDM modulation; the first part is used for beam scanning, and the subcarriers used for beam scanning training in the first part include m subcarriers out of every N subcarriers; N is an integer greater than 1, and m is a positive integer less than N; the processing module is used to determine a beam measurement report based on the PPDU.

[0118] Optionally, the transceiver module and processing module of the communication device in the sixth aspect may also perform the corresponding functions in the second aspect or any possible implementation of the second aspect, as detailed in the method examples, and the beneficial effects that can be achieved can also be found in the foregoing related content.

[0119] A seventh aspect provides a communication apparatus for implementing the method of the third aspect. The communication apparatus may be the access point device described in the third aspect, or a device or component included in the access point device, such as a chip.

[0120] The communication device includes modules, units, or means that implement the methods described above. These modules, units, or means can be implemented in hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the functions described above.

[0121] In some possible implementations, the communication device may include a processing module and a transceiver module. The transceiver module may include a transmitting module and a receiving module, respectively used to implement the transmitting and receiving functions of the third aspect and any possible implementation thereof. The processing module may be used to implement the processing functions of the third aspect and any possible implementation thereof. For example, the processing module is used to generate PPDUs; wherein the frame format of the PPDU is DSSS format, the PPDU is based on OFDM modulation, and the PPDU is used for beam scanning; the transceiver module is used to transmit the PPDUs on a high-frequency channel.

[0122] Optionally, the transceiver module and processing module of the communication device in the seventh aspect may also perform the corresponding functions in the third aspect or any possible implementation of the third aspect, as detailed in the method examples, and the beneficial effects that can be achieved can also be found in the foregoing related content.

[0123] Eighthly, a communication apparatus is provided for implementing the method of the fourth aspect. The communication apparatus may be the site equipment described in the fourth aspect, or a device or component included in the site equipment, such as a chip.

[0124] The communication device includes modules, units, or means that implement the methods described above. These modules, units, or means can be implemented in hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the functions described above.

[0125] In some possible implementations, the communication device may include a processing module and a transceiver module. The transceiver module may include a transmitting module and a receiving module, respectively used to implement the transmitting and receiving functions of the fourth aspect and any possible implementation thereof. The processing module may be used to implement the processing functions of the fourth aspect and any possible implementation thereof. For example, the transceiver module is used to receive PPDUs on a high-frequency channel; wherein the PPDU frame format is DSSS format, the PPDU is based on OFDM modulation, and the PPDU is used for beam scanning; the processing module is used to determine a beam measurement report based on the PPDU.

[0126] Optionally, the transceiver module and processing module of the communication device in the eighth aspect may also perform the corresponding functions in the fourth aspect or any possible implementation of the fourth aspect, as detailed in the method examples, and the beneficial effects that can be achieved can also be found in the foregoing related content.

[0127] A ninth aspect provides a communication device comprising: at least one processor configured to cause the communication device to perform the method described in any of the preceding aspects or possible implementations thereof by executing computer instructions stored in a memory or by logic circuitry. The communication device may be an access point device in the first aspect or any possible implementation thereof, or a device or component included in an access point device, such as a chip; or, the communication device may be a station device in the second aspect or any possible implementation thereof, or a device or component included in a station device, such as a chip; or, the communication device may be an access point device in the third aspect or any possible implementation thereof, or a device or component included in an access point device, such as a chip; or, the communication device may be a station device in the fourth aspect or any possible implementation thereof, or a device or component included in a station device, such as a chip.

[0128] In some possible implementations, the communication device also includes a memory for storing configuration files of computer instructions and / or logic circuits. Optionally, the memory is integrated with the processor, or the memory is independent of the processor.

[0129] A tenth aspect provides a communication device, comprising: a processor and a communication interface; the communication interface being used for inputting and / or outputting signals; the processor being used to execute a computer program or instructions to cause the communication device to perform the method described in any of the preceding aspects. The communication device may be an access point device in the first aspect or any possible implementation of the first aspect, or a device or component included in an access point device, such as a chip; or, the communication device may be a station device in the second aspect or any possible implementation of the second aspect, or a device or component included in a station device, such as a chip; or, the communication device may be an access point device in the third aspect or any possible implementation of the third aspect, or a device or component included in an access point device, such as a chip; or, the communication device may be a station device in the fourth aspect or any possible implementation of the fourth aspect, or a device or component included in a station device, such as a chip.

[0130] In some possible implementations, the communication interface is an interface circuit used to read and write computer instructions. For example, the interface circuit is used to receive computer execution instructions (which are stored in memory and may be read directly from memory or may be transmitted through other devices) and transmit them to the processor.

[0131] In some possible implementations, the communication interface is used to communicate with modules outside the communication device.

[0132] In some possible implementations, the communication device can be a chip or a chip system. When the device is a chip system, the chip system may include chips or contain chips and other discrete components.

[0133] Eleventhly, a communication device is provided, comprising: a logic circuit and an interface circuit; the interface circuit being used for inputting information and / or outputting information; the logic circuit being used to perform the method described in any of the preceding aspects, processing the input information and / or generating output information. The communication device may be an access point device in the first aspect or any possible implementation of the first aspect, or a device or component included in an access point device, such as a chip; or, the communication device may be a station device in the second aspect or any possible implementation of the second aspect, or a device or component included in the station device, such as a chip; or, the communication device may be an access point device in the third aspect or any possible implementation of the third aspect, or a device or component included in the access point device, such as a chip; or, the communication device may be a station device in the fourth aspect or any possible implementation of the fourth aspect, or a device or component included in the station device, such as a chip.

[0134] In a twelfth aspect, a computer-readable storage medium is provided, which stores a computer program or instructions that, when executed by a processor, cause the method described in any of the preceding aspects to be performed.

[0135] In a thirteenth aspect, a computer program product is provided that, when executed by a processor, causes the method described in any of the preceding aspects to be performed.

[0136] It is understood that when the communication device provided in any of the fifth to tenth aspects is a chip, the aforementioned sending action / function can be understood as output information, and the aforementioned receiving action / function can be understood as input information.

[0137] The technical effects of any of the implementations of aspects 5 to 13 can be found in the technical effects of the first aspect or any possible implementation of the first aspect, or in the technical effects of the second aspect or any possible implementation of the second aspect, or in the technical effects of the third aspect or any possible implementation of the third aspect, or in the technical effects of the fourth aspect or any possible implementation of the fourth aspect, and will not be repeated here.

[0138] In a fourteenth aspect, a communication system is provided, comprising an access point device implementing the first aspect or any possible implementation of the first aspect and a site device implementing the second aspect or any possible implementation of the second aspect; or, the communication system comprises an access point device implementing the third aspect or any possible implementation of the third aspect and a site device implementing the fourth aspect or any possible implementation of the fourth aspect. Attached Figure Description

[0139] Figure 1 A schematic diagram of an OFDM subcarrier provided in an embodiment of this application;

[0140] Figure 2 A schematic diagram illustrating a control of a physical layer format frame provided in an embodiment of this application;

[0141] Figure 3 A schematic diagram of a communication system provided in an embodiment of this application;

[0142] Figure 4 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0143] Figure 5 An interactive schematic diagram of a communication method provided in an embodiment of this application;

[0144] Figure 6 A schematic diagram of a PPDU frame format provided in an embodiment of this application;

[0145] Figure 7 A schematic diagram of a PPDU frame format provided in an embodiment of this application;

[0146] Figure 8 A schematic diagram of a PPDU frame format provided in an embodiment of this application;

[0147] Figure 9 A schematic diagram of a PPDU frame format provided in an embodiment of this application;

[0148] Figure 10 A schematic diagram of a PPDU frame format provided in an embodiment of this application;

[0149] Figure 11 A schematic diagram of a beam measurement process provided in an embodiment of this application;

[0150] Figure 12 A schematic diagram of a beam measurement process provided in an embodiment of this application;

[0151] Figure 13 An interactive schematic diagram of a communication method provided in an embodiment of this application;

[0152] Figure 14 An interactive schematic diagram of a communication method provided in an embodiment of this application;

[0153] Figure 15 An interactive schematic diagram of a communication method provided in an embodiment of this application;

[0154] Figure 16 This is a schematic diagram of the structure of an access point device provided in an embodiment of this application;

[0155] Figure 17 This application provides a schematic diagram of the structure of a site device according to an embodiment of the present application.

[0156] Figure 18 This is a schematic diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0157] To facilitate understanding of the technical solutions in the embodiments of this application, this application provides a brief introduction to related technologies:

[0158] Millimeter wave: The millimeter wave band is a high-frequency band with the advantages of narrow beam direction, low interference, and focused signal strength. It can reduce interference, improve user experience, and is suitable for future wireless fidelity (Wi-Fi).

[0159] Signals transmitted in the millimeter-wave frequency band can be called millimeter-wave signals.

[0160] Among them, the standards corresponding to short-moment millimeter waves are the 802.11ad and 802.11ay standards. The 802.11ad and 802.11ay standards propose that millimeter wave signals can be modulated using a single-carrier (SC) modulation mode.

[0161] Orthogonal Frequency Division Multiplexing (OFDM) modulation mode: Signals transmitted in the low-frequency band (which can be simply referred to as low-frequency signals) can be modulated based on the OFDM modulation mode. In the OFDM modulation mode, as follows: Figure 1 As shown, guard subcarriers can be distributed at both ends of the channel to form a guard band, preventing signal energy from leaking into adjacent channels and interfering with signals on adjacent channels; DC subcarriers are distributed in the center of the channel to bypass interference from the DC component in the transceiver; and subcarriers for modulation are distributed between the DC subcarriers and the guard subcarriers to place data subcarriers and pilot subcarriers.

[0162] Based on the above description of millimeter wave and OFDM modulation modes, when communication equipment supports the transmission of millimeter wave signals and low-frequency signals, it is necessary to configure two modulation modes (i.e., SC modulation mode and OFDM modulation mode), which will increase the complexity of implementation. In order to reduce the complexity, both signals can be modulated using OFDM modulation mode or using control physical (Control PHY) layer modulation mode.

[0163] One issue is that OFDM modulation of millimeter-wave signals results in a lower SNR on each subcarrier, reducing communication reliability. Furthermore, OFDM modulation of millimeter-wave signals can lead to insufficient link budget during the sector sweep (SSW) phase of beam scanning, causing site equipment to fail to receive the beam scanning signal sent by the access point equipment and hindering effective beam training.

[0164] Beam scanning refers to the process by which access point equipment controls the direction and shape of a scanning beam by changing the relative phase and amplitude between antenna elements, and sends beam scanning signals to site equipment through scanning beams of different directions and shapes. Correspondingly, site equipment can receive beam scanning signals from scanning beams of different directions and shapes and report beam measurement reports to access point equipment (beam measurement reports indicate the RSSI of signals on scanning beams of different directions and shapes, allowing access point equipment to determine the beam used for communication with site equipment based on the beam measurement reports).

[0165] The control physical layer modulation mode is derived from the SC modulation mode. Compared to SC modulation, the control physical layer modulation mode can use differential binary phase shift keying (BPSK) modulation to modulate the signal. Furthermore, it employs a low bit rate (e.g., 1 / 2 bit rate) for modulation. Additionally, the 802.11ad and 802.11ay standards define a control physical layer format frame, as follows: Figure 2 As shown, the control physical layer format frame can include a short sequence control field and a channel estimation field. The short sequence control field is 6400 bits long and consists of 48 repeated training sequences of length 128. Each training sequence can be represented as a Gb... i i = 1, 2, ..., 128; the channel estimation field can include one or more channel estimation subfields, each of which can be represented by Gv, such as Gv 512 The corresponding channel estimation subfield can be 512 bits long, Gv 128 The length of the corresponding channel estimation subfield can be 128 bits.

[0166] It is understandable that the control physical layer format frame uses 128 times the spreading codeword (the spreading codeword can be understood as the training sequence). That is, in the control physical layer format modulation mode, a longer code sequence can be formed by repeating the spreading codeword, which can obtain the spreading gain and thus improve the reliability of communication.

[0167] For example, in physical layer modulation mode, with a channel bandwidth of 2.16 GHz and an MCS index of 0, a scanning beam can be transmitted at a rate of 27.5 Mbps for beam scanning training or for transmitting initial connection information.

[0168] However, controlling the physical layer modulation mode involves more implementation logic compared to the SC modulation mode, resulting in higher implementation complexity.

[0169] Therefore, how to simplify the implementation of signal transmission in communication devices at low and high frequencies and reduce the complexity of implementation has become an urgent problem to be solved.

[0170] To address the aforementioned technical problems, this application provides a communication method, comprising: an access point device generating a PPDU; and transmitting the PPDU on a high-frequency channel. The PPDU includes a first part; the first part is based on OFDM modulation; the first part is used for beam scanning, and the subcarriers used for beam scanning training in the first part include m subcarriers out of every N subcarriers; N is an integer greater than 1, and m is a positive integer less than N.

[0171] In this embodiment of the application, the access point device performs OFDM modulation on the first part. Since the subcarriers used for beam scanning training in the first part include m subcarriers out of every N subcarriers, based on the power spectral density limitation, the power can be concentrated on the subcarriers used for beam scanning training in the first part, which can improve the power on the subcarriers used for beam scanning training in the first part, thereby effectively improving the SNR on the subcarriers used for beam scanning training in the first part, and improving the reliability of communication.

[0172] In addition, by reusing low-frequency OFDM modulation modes, access point equipment can achieve beam measurement and communication with site equipment at both high and low frequencies using a single modulation mode. This enables high- and low-frequency integrated design reuse, thereby reducing the complexity of beam measurement and communication between access point equipment in both low and high frequency bands.

[0173] Furthermore, by carrying the first part in the PPDU and using it for beam scanning, a reliable and low-complexity beam scanning method can be provided for the establishment of high-frequency links, which can simplify the implementation of beam scanning in high-frequency channels.

[0174] The communication method provided in this application embodiment is applicable to wireless local area networks (WLANs) that support relevant IEEE standards. These relevant IEEE standards include, but are not limited to, 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11bn / Ultra High Resolution (UHR) / Wi-Fi 8, 802.11ad, 802.11ay, 802.11bf / sensing, Ultra Wideband (UWB) / 802.15, etc.

[0175] For example, such as Figure 3 The diagram shown is a structural schematic of a communication system provided in this application. The communication system may include access point equipment and site equipment.

[0176] There can be one or more access point devices, and there can be one or more site devices.

[0177] The access point device can be a device that supports the 802.11be standard or a future Wi-Fi standard, or a device that supports multiple WLAN standards; it can also be a device that supports the 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11bn / UHR / WiFi8 standards, without any restrictions.

[0178] For example, access point devices can be terminal devices with Wi-Fi chips, network devices, communication servers, routers, switches, bridges, computers, etc. Access point devices can also serve as access points for mobile users to access wired networks, primarily deployed in homes, buildings, and campuses, with a typical coverage radius of tens to hundreds of meters. Of course, they can also be deployed outdoors. An access point device acts as a bridge connecting wired and wireless networks, its main function being to connect various wireless network clients together and then connect the wireless network to the Ethernet.

[0179] For example, the site device can be a device that supports multiple WLAN standards such as the 802.11be standard or future Wi-Fi standards; it can also be a device that supports the 802.11a / b / g standard, 802.11n standard, 802.11ac standard, 802.11ax standard, 802.11be standard, 802.11bn standard / UHR standard / Wi-Fi8 standard, without limitation.

[0180] For example, site equipment can be wireless communication chips, wireless sensors, wireless communication terminals, communication servers, routers, switches, bridges, computers, etc. For example, site equipment can be mobile phones supporting Wi-Fi communication, tablets supporting Wi-Fi communication, set-top boxes supporting Wi-Fi communication, smart TVs supporting Wi-Fi communication, smart wearable devices supporting Wi-Fi communication, vehicle communication equipment supporting Wi-Fi communication, and computers supporting Wi-Fi communication, etc., without restriction.

[0181] It should be noted that the communication system described in the embodiments of this application is for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and does not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0182] In practical implementation, Figure 3 As shown in the figure: Each access point device and site device can adopt Figure 4 The shown composition structure, or including Figure 4 The components shown. Figure 4 This is a schematic diagram illustrating the composition of a communication device 400 provided in an embodiment of this application. The communication device 400 can be a site device or a chip or system-on-a-chip within a site device; it can also be an access point device or a chip or system-on-a-chip within an access point device. For example... Figure 4 As shown, the communication device 400 includes a processor 401, a transceiver 402, and a communication line 403.

[0183] Furthermore, the communication device 400 may also include a memory 404. The processor 401, memory 404, and transceiver 402 can be connected via a communication line 403.

[0184] The processor 401 can be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 401 can also be other devices with processing capabilities, such as circuits, devices, or software modules, without limitation.

[0185] Transceiver 402 is used to communicate with other devices or other communication networks. These other communication networks can be Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. Transceiver 402 can be a module, circuit, transceiver, or any device capable of enabling communication.

[0186] Communication line 403 is used to transmit information between the components included in communication device 400.

[0187] Memory 404 is used to store instructions. These instructions can be computer programs.

[0188] The memory 404 can be a read-only memory (ROM) or other type of static storage device that can store static information and / or instructions; it can also be a random access memory (RAM) or other type of dynamic storage device that can store information and / or instructions; it can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0189] It should be noted that the memory 404 can exist independently of the processor 401, or it can be integrated with the processor 401. The memory 404 can be used to store instructions, program code, or some data, etc. The memory 404 can be located inside or outside the communication device 400, without limitation. The processor 401 is used to execute the instructions stored in the memory 404 to implement the communication method provided in the following embodiments of this application.

[0190] In one example, processor 401 may include one or more CPUs, for example Figure 4 CPU0 and CPU1 in the CPU.

[0191] As an optional implementation, the communication device 400 includes multiple processors, for example, besides Figure 4 In addition to processor 401, it may also include processor 407.

[0192] As an optional implementation, the communication device 400 also includes an output device 405 and an input device 406. For example, the input device 406 is a device such as a keyboard, mouse, microphone, or joystick, and the output device 405 is a device such as a display screen or speaker.

[0193] It should be noted that the communication device 400 can be a desktop computer, laptop computer, network server, mobile phone, tablet computer, wireless terminal, embedded device, chip system, or other device. Figure 4 Equipment with a similar structure. Furthermore... Figure 4 The structural composition shown does not constitute a limitation on the communication device, except... Figure 4 In addition to the components shown, the communication device may include more or fewer components than illustrated, or combine certain components, or have different component arrangements.

[0194] In this embodiment of the application, the chip system may be composed of chips or may include chips and other discrete devices.

[0195] Furthermore, the actions, terms, etc., involved in the various embodiments of this application can be referenced interchangeably without limitation. The message names or parameter names in the messages exchanged between the various devices in the embodiments of this application are merely examples, and other names may be used in specific implementations without limitation.

[0196] The following is combined Figure 3 The communication system shown refers to the following Figure 5 The communication method provided in the embodiments of this application will be described below. The access point device and site device described in the following embodiments may have... Figure 4 The component shown.

[0197] Figure 5 A flowchart of a communication method provided in an embodiment of this application is shown below. Figure 5 As shown, the method may include:

[0198] S501, the access point device generates a PPDU.

[0199] The PPDU includes the first part.

[0200] The first part is used for beam scanning.

[0201] Optionally, the first part may be a UHR-TRN field (or may be described as an integrated millimeter wave (IMMW)-TRN field); or, the first part may be a UHR-LTF field (or may be described as an IMW-LTF field); or, the first part may include a UHR-LTF field and a UHR-data field (or may be described as an IMW-data field); or, the first part may include a UHR-STF field, a UHR-LTF field, and a UHR-data field; or, the first part may include a UHR-STF field and a UHR-LTF field; or, the first part may include a UHR-STF field, a UHR-LTF field, and a UHR-SIG field. This application does not limit this.

[0202] It is understood that a PPDU may include one or more first parts, and each of the one or more first parts corresponds to a scanning beam. That is, different first parts in a PPDU can be mapped onto different scanning beams for transmission to achieve beam scanning training.

[0203] For example, the frame format of a PPDU is as follows: Figure 6As shown, taking the PPDU as an example, which consists of three first parts, Figure 6 In a PPDU, the three first parts follow the legacy (L)-preamble field. That is, a PPDU may include an L-preamble field, first part 1, first part 2, and first part 3. The L-preamble field may include one or more of the following: an L-SIG field, an L-STF field, or an L-LTF field.

[0204] For example, the first part can be a UHR-TRN field, and the frame format of the PPDU can be as follows: Figure 7 As shown in (a), a PPDU may include an L-leader field and three UHR-TRN fields, with the UHR-TRN fields located after the L-leader field.

[0205] For example, the first part can be a UHR-LTF field, and the frame format of the PPDU can be as follows: Figure 7 As shown in (b), a PPDU may include an L-leader field and three UHR-LTF fields, with the UHR-LTF fields following the L-leader field.

[0206] For example, the first part can include the UHR-LTF field and the UHR-data field, and the frame format of the PPDU can be as follows: Figure 7 As shown in (c), a PPDU may include an L-preamble field and three first parts, in which the UHR-data field may follow the UHR-LTF field. For example, the first part may include a UHR-STF field, a UHR-LTF field, and a UHR-data field, and the frame format of the PPDU may be as follows: Figure 7 As shown in (d), a PPDU may include an L-preface field and three first parts, in which the UHR-STF field may precede the UHR-LTF field and the UHR-LTF field may precede the UHR-data field.

[0207] For example, the first part may include the UHR-STF field and the UHR-LTF field, and the frame format of the PPDU can be as follows: Figure 7 As shown in (e), the PPDU may include an L-prefix field and three first parts, in which the UHR-STF field may precede the UHR-LTF field.

[0208] For example, the first part may include the UHR-STF field, the UHR-LTF field, and the UHR-SIG field. The frame format of the PPDU can be as follows: Figure 7As shown in (f), the PPDU may include an L-prefix field and three first parts, in which the UHR-STF field may precede the UHR-LTF field and the UHR-LTF field may precede the UHR-SIG field.

[0209] It is understandable that the above Figure 7 The frame formats of PPDUs in this application are just a few examples. PPDU frame formats can also be other forms, and this application does not limit them.

[0210] In addition, the PPDU frame format in this application may or may not include an L-preamble field, and this application does not limit this.

[0211] The first part is based on OFDM modulation, meaning that the access point device can perform OFDM modulation on the first part.

[0212] The first part of the subcarriers used for beam scanning training includes m subcarriers out of every N subcarriers, or it can be described as follows: the first part of the subcarriers used for beam scanning training includes m subcarriers out of every N subcarriers in the total subcarriers corresponding to the PPDU.

[0213] The total subcarriers corresponding to the PPDU can be related to the bandwidth. For example, the total subcarriers corresponding to the PPDU can be the total subcarriers corresponding to the first part, and the corresponding number of total subcarriers corresponding to the PPDU can be the number of total subcarriers corresponding to the first part.

[0214] The total subcarrier corresponding to the PPDU is determined according to the OFDM modulation format. That is, by performing OFDM modulation on the PPDU based on different OFDM modulation formats, different total subcarriers corresponding to the PPDU can be obtained.

[0215] Where N is an integer greater than 1, and m is a positive integer less than N.

[0216] For example, N can be 9, or N can be 10.

[0217] For example, m can be 1, or m can be 2.

[0218] For example, the first portion of the subcarriers used for beam scanning training may include one subcarrier out of every nine subcarriers, or the first portion of the subcarriers used for beam scanning training may include two subcarriers out of every nine subcarriers.

[0219] Understandably, when m is 1, the energy on the subcarriers used for beam scanning training in the first part is more concentrated, the SNR on the effective subcarriers is improved, and the reliability of communication can be improved.

[0220] It is understandable that each N subcarrier can be a consecutive subcarrier or a frequency-adjacent subcarrier.

[0221] The subcarriers used in beam scanning training can also be described as the subcarriers used for channel estimation during beam scanning.

[0222] The total number of subcarriers corresponding to a PPDU is related to the bandwidth. In this application, the total number of subcarriers corresponding to a PPDU can be denoted as Y.

[0223] It is understandable that when the ratio of Y to N is an integer, the number of subcarriers used for beam scanning training in the first part can be m / N of the total number of subcarriers corresponding to the PPDU. For example, the number of subcarriers used for beam scanning training in the first part can be 1 / 9 of the total number of subcarriers corresponding to the PPDU, or the number of subcarriers used for beam scanning training in the first part can be 2 / 9 of the total number of subcarriers corresponding to the PPDU.

[0224] For example, taking Y as 252, m / N is 1 / 9, and the product of 252 and 1 / 9 is 18. That is, the product of 252 and 1 / 9 is an integer, so the number of subcarriers used for beam scanning training in the first part can be determined to be 18. Then, 18 subcarriers can be determined from the total subcarriers corresponding to the PPDU as the subcarriers used for beam scanning training in the first part.

[0225] The example of Y being 252 is merely an example; Y can also be any other value, and this application does not limit this.

[0226] Optionally, the distance between any two subcarriers in the first part used for beam scanning training can be the same.

[0227] The distance between any two subcarriers can be understood as the number of subcarriers between any two subcarriers, or the distance between any two subcarriers can be understood as the time interval between any two subcarriers.

[0228] For example, taking m as 1 and N as 9, the distance between any two subcarriers in the first part used for beam scanning training can be 9 subcarriers. Assuming the total number of subcarriers includes subcarrier 1, subcarrier 2, ..., subcarrier 252, and subcarrier 1 can be determined, then the first part of the subcarriers used for beam scanning training can include subcarrier 1, subcarrier 10, subcarrier 19, ..., subcarrier 252. For example, the number of subcarriers between subcarrier 1 and subcarrier 10 is 9, and the number of subcarriers between subcarrier 10 and subcarrier 19 is also 9.

[0229] For example, using the PPDU frame format as Figure 7Taking (d) as an example, when the L-preamble field (or synchronization or channel estimation reference symbol) and the first part use OFDM modulation with the same number of Fast Fourier Transform (FFT) points, the subcarriers used for transmission in the L-preamble field and the subcarriers used for beam scanning training in the first field can be as follows: Figure 8 As shown, the subcarrier used in the L-preamble field can be either the total subcarrier corresponding to the PPDU or a portion of the total subcarriers corresponding to the PPDU; the subcarriers used for beam scanning training in the first part can be a portion of the total subcarriers corresponding to the PPDU, and the number of subcarriers between any two adjacent subcarriers in the first part used for beam scanning training is the same.

[0230] The specific method for determining the first part of the subcarriers used for beam scanning training can be referred to in the following description of how the access point device can determine m subcarriers from every N subcarriers corresponding to the PPDU to determine the first part of the subcarriers used for beam scanning training, which will not be repeated here.

[0231] Optionally, multiple subcarriers in the first part used for beam scanning training can be used to modulate the same information.

[0232] For example, such as Figure 8 As shown, the first part of the subcarriers used for beam scanning training may include subcarrier 1, subcarrier 10, subcarrier 19, ..., subcarrier 43 from the total subcarriers corresponding to the PPDU. Subcarrier 1 and subcarrier 10 can modulate the same information, subcarrier 19 and subcarrier 28 can modulate the same information, and subcarrier 37 and subcarrier 46 can modulate the same information; or, subcarrier 1, subcarrier 10, and subcarrier 19 can modulate the same information, and subcarrier 28, subcarrier 37, and subcarrier 46 can modulate the same information.

[0233] Understandably, the same information can be modulated onto multiple subcarriers and repeated to improve communication reliability.

[0234] S502. The access point equipment transmits PPDU on the high-frequency channel; correspondingly, the site equipment receives PPDU on the high-frequency channel.

[0235] The frequency band corresponding to the high-frequency channel can be 3GHz-30GHz, or 30GHz-300GHz, or 300GHz-300GHz, or 300GHz-3000GHz, or 30GHz-3000GHz, or 3GHz-3000GHz.

[0236] For example, the frequency band corresponding to a high-frequency channel can be 60GHz.

[0237] Optionally, the high-frequency channel can be a millimeter-wave channel.

[0238] In the process of receiving PPDU, the site equipment can receive the corresponding first part based on the scanning beam.

[0239] S503. The site equipment determines the beam measurement report based on the PPDU.

[0240] Specifically, the site equipment can determine the RSSI of the first part (which can also be understood as the RSSI of the scanning beam corresponding to the first part) based on the first part received by the scanning beam, and then determine the beam measurement report based on the RSSI of the scanning beam corresponding to the first part.

[0241] It is understandable that when a PPDU includes multiple first parts, the site equipment can determine the RSSI of the scanning beam corresponding to each first part. In this case, the beam measurement report can include the RSSI of the scanning beam corresponding to multiple first parts.

[0242] Furthermore, the site equipment can send a beam measurement report to the access point equipment; correspondingly, the access point equipment can receive the beam measurement report from the site equipment and determine the beam used for communication based on the beam measurement report (that is, when the access point equipment communicates with the site equipment, it can transmit data and signaling based on the beam used for communication to improve the reliability of communication).

[0243] For example, taking a beam measurement report that includes the RSSI of scanned beam 1, the RSSI of scanned beam 2, and the RSSI of scanned beam 3, assuming that the RSSI of scanned beam 1 is the largest, the access point device can use scanned beam 1 as the beam for communication; or, assuming that the RSSI of scanned beam 2 is the largest, the access point device can use scanned beam 2 as the beam for communication; assuming that the RSSI of scanned beam 1 is the largest, the access point device can use scanned beam 3 as the beam for communication.

[0244] Understandably, different scanning beams may have different directions. Access point devices can transmit the first part based on different scanning beams, and correspondingly, site devices can receive the corresponding first part based on different scanning beams and determine the RSSI of the scanning beam corresponding to the first part. Specifically, the RSSI of the scanning beam is maximum when the transmission direction of the scanning beam is directly towards the site device; and minimum when the transmission direction of the scanning beam is opposite to the site device. Therefore, access point devices can determine the scanning beam corresponding to the maximum RSSI value in the beam measurement report as the beam used for communication, which can effectively improve the reliability of communication between access point devices and site devices.

[0245] Similarly, different scanning beams may have different waveforms. Access point devices can send the first part based on different scanning beams. Correspondingly, site devices can receive the corresponding first part based on different scanning beams and determine the RSSI of the scanning beam corresponding to the first part. Access point devices can determine the scanning beam corresponding to the maximum value of RSSI in the beam measurement report as the beam used for communication. The waveform of this scanning beam is suitable for the current communication scenario and can effectively improve the reliability of communication between access point devices and site devices.

[0246] based on Figure 5 The communication method shown involves the access point device performing OFDM modulation on the first part. Since the subcarriers used for beam scanning training in the first part include m subcarriers out of every N subcarriers, based on the power spectral density limitation, the power can be concentrated on the subcarriers used for beam scanning training in the first part, which can improve the power on the subcarriers used for beam scanning training in the first part, thereby effectively improving the SNR on the subcarriers used for beam scanning training in the first part, and improving the reliability of communication.

[0247] In addition, by reusing low-frequency OFDM modulation modes, access point equipment can achieve beam measurement and communication with site equipment at both high and low frequencies using a single modulation mode. This enables high- and low-frequency integrated design reuse, thereby reducing the complexity of beam measurement and communication between access point equipment in both low and high frequency bands.

[0248] Furthermore, by carrying the first part in the PPDU and using it for beam scanning, a reliable and low-complexity beam scanning method can be provided for the establishment of high-frequency links, which can simplify the implementation of beam scanning in high-frequency channels.

[0249] Based on the description of m and N in S501, m and N can optionally be predefined, or m and M can be indicated by the access point device.

[0250] Specifically, the access point device can determine m and M based on the actual communication scenario or communication situation, and indicate m and N to the site device through indication information.

[0251] In one example, as follows: Figure 9 As shown, the PPDU may also include a first field, which may include indication information, wherein the first field is located before the first part.

[0252] For example, the first field can be the UHR-SIG field (or it can be described as the IMMW-SIG field).

[0253] In another example, the access point device may send indication information on a low-frequency channel before sending the PPDU.

[0254] It is understandable that the access point device can establish a connection with the site device on a low-frequency channel before performing beam scanning on the high-frequency channel. Furthermore, the access point device can send indication information to the site device on the low-frequency channel to indicate m and N.

[0255] The indication information can be transmitted separately, or it can be located in the first frame, without restriction.

[0256] The first frame can be a reused existing frame or a newly added frame (the first frame can also be described as a scan instruction frame or a preceding frame), without restriction.

[0257] For example, taking the first frame as a reused existing frame as an example, the first frame can be a probe frame, or the first frame can be a beacon frame, or the first frame can be an association response frame.

[0258] Understandably, the access point device can proactively indicate m and N to the site device. For example, the access point device can send a probe frame (which includes indication information) or a beacon frame (which includes indication information) on a low-frequency channel to send indication information to the site device. Alternatively, the access point device can indicate m and N to the site device after receiving a request from the site device. For example, the site device can send an association request frame to the access point device. The association request frame is used to instruct the site device to request the establishment of a connection on a high-frequency channel. Correspondingly, after receiving the association request frame, the access point device can send a request response frame (which includes indication information) to the site device to send indication information to the site device.

[0259] Understandably, compared to access point devices indicating m and N through indication information, predefined m and N can effectively reduce signaling transmission overhead. Compared to predefined m and N, access point devices can dynamically determine m and N according to the actual communication scenario or communication situation, which can make the determined m and N better meet the current communication needs, improve communication reliability, and enhance the flexibility and diversity of determining m and N.

[0260] based on Figure 5 The communication method shown allows the access point device to determine m subcarriers from every N subcarriers corresponding to the PPDU, thereby determining the first portion of subcarriers used for beam scanning training. This application proposes two possible implementations:

[0261] In one possible implementation, the access point device can determine multiple subcarrier groups sequentially from the first subcarrier of the total subcarrier corresponding to the PPDU, or it can determine multiple subcarrier groups sequentially from the last subcarrier of the total subcarrier corresponding to the PPDU, and further, the access point device can determine m subcarriers in each subcarrier group.

[0262] Taking the total number of subcarriers corresponding to a PPDU as Y as an example, when the ratio of Y to N is an integer, the access point device can determine Y / N subcarrier groups, and each subcarrier group can include N subcarriers. When the ratio of Y to N is not an integer, the access point device can determine... Group of subcarriers, front (or A subcarrier group may include N subcarriers, with the last subcarrier group containing more than N subcarriers; or, the access point device may determine... Group of subcarriers, front A subcarrier group can include N subcarriers, with the last subcarrier group containing fewer than N subcarriers.

[0263] in, Indicates rounding up. This indicates rounding down to the nearest integer.

[0264] For example, if Y / N and If the difference is less than 1 / 2, it can be determined that... Group subcarriers, at this time the previous The number of subcarriers in a subcarrier group can be N, and the number of subcarriers in the last subcarrier group can be... Or, if Y / N and If the difference is greater than or equal to 1 / 2, it can be determined that... Group of subcarriers, front The number of subcarriers in a subcarrier group can be N, and the number of subcarriers in the last subcarrier group can be...

[0265] For example, with Y = 256 and N = 9, we can determine that Y / N = 28.4 (the difference between 28.4 and 28 is less than 1 / 2). Therefore, we can determine 28 subcarrier groups. Each of the first 27 subcarrier groups can include 9 subcarriers, and the last subcarrier group can include 13 subcarriers. Alternatively, with Y = 260 and N = 9, we can determine that Y / N = 28.8. Therefore, we can have 29 subcarrier groups. Each of the first 28 subcarrier groups can include 9 subcarriers, and the last subcarrier group can include 8 subcarriers.

[0266] In determining m subcarriers in each subcarrier group, the distance between any two subcarriers in the determined m subcarriers can be made the same, and the distance between the subcarriers determined in the previous subcarrier group and the subcarriers determined in the next subcarrier group can be the same.

[0267] For example, taking m as 1 and N as 9, assuming that the total subcarriers corresponding to the PPDU can include subcarrier 1, subcarrier 2, ..., subcarrier Y, it can be determined that the first group of subcarriers includes subcarrier 1, subcarrier 2, ..., subcarrier 9, the second group of subcarriers includes subcarrier 10, subcarrier 11, ..., subcarrier 18, ..., and the third group of subcarriers includes subcarrier Y-8, subcarrier Y-7, ..., subcarrier Y. Then, the kth subcarrier in each group of subcarriers can be determined as the first part of the subcarriers used for beam scanning training.

[0268] Where k is a positive integer less than or equal to N / m.

[0269] For example, if k is 1, the first part of the subcarriers used for beam scanning training may include subcarrier 1, subcarrier 10, ..., subcarrier Y-8; or, if k is 9, the first part of the subcarriers used for beam scanning training may include subcarrier 9, subcarrier 18, ..., subcarrier Y.

[0270] In a second possible implementation, the subcarriers used for beam scanning training in the first part can be symmetrically distributed based on the center subcarrier. Here, the center subcarrier is the subcarrier at the center of the total subcarriers corresponding to the PPDU.

[0271] In determining m subcarriers in each subcarrier group, the distance between any two subcarriers in the determined m subcarriers can be made the same, and the distance between the subcarriers determined in the previous subcarrier group and the subcarriers determined in the next subcarrier group can be the same.

[0272] In one example, the access point device can determine multiple subcarrier groups based on the method of determining subcarrier groups in the first possible implementation described above. Further, it can determine m subcarriers starting from the first subcarrier in each subcarrier group. If the m subcarriers in the determined multiple subcarrier groups are not symmetrically distributed based on the central subcarrier, it can redetermine m subcarriers starting from the second subcarrier in each subcarrier group, and so on, until the m subcarriers in the determined multiple subcarrier groups are symmetrically distributed based on the central subcarrier.

[0273] In another example, the access point device can determine multiple subcarrier groups based on the central subcarrier. That is, it can symmetrically determine multiple subcarrier groups starting from the central subcarrier (e.g., taking the total subcarriers corresponding to the PPDU as including subcarrier 1, subcarrier 2, ..., subcarrier Y as an example, with subcarrier Y / 2 as the central subcarrier, it can be determined that subcarrier group 11 includes subcarrier Y / 2+1, subcarrier Y / 2+2, ..., subcarrier Y / 2+N; subcarrier group 12 includes Y / 2-1, subcarrier Y / 2-2, ..., subcarrier Y / 2-N; it can be determined that subcarrier group 21 includes subcarrier Y / 2+N+1, subcarrier Y... / 2+N+2、…、subcarrier Y / 2+2N、subcarrier group 22 includes Y / 2-N-1、subcarrier Y / 2-N-2、…、subcarrier Y / 2-2N;…), further, when the access point device determines m subcarriers in each subcarrier, it can make the m subcarriers determined in the two subcarrier groups based on the central subcarrier symmetry ...

[0274] Based on the second possible implementation, the time period of the first part in the time domain can be m / N of the OFDM symbol period. That is, the first part can form a repetitive signal in the time domain, which enables the site equipment to detect the scanning beam corresponding to the first part through simple time-domain correlation processing, so as to determine the RSSI of the scanning beam corresponding to the first part, thereby improving the detection sensitivity.

[0275] Understandably, when the ratio of the total number of subcarriers corresponding to the PPDU to N is an integer, the number of subcarriers used for beam scanning training in the first part can be m / N of the total number of subcarriers corresponding to the PPDU. That is, the access point device can directly determine Y*(m / N) subcarriers from the total number of subcarriers corresponding to the PPDU as the first part of the subcarriers used for beam scanning training. Here, Y is the total number of subcarriers corresponding to the PPDU.

[0276] The access point device can select Y*(m / N) subcarriers from the total subcarriers corresponding to the PPDU according to the first preset rule as the first part of the subcarriers used for beam scanning training.

[0277] The first preset rule can be illustrated as shown in the following example:

[0278] In the first example, the first preset rule can specify starting from the kth sequential subcarrier in the total subcarriers corresponding to the PPDU, and... Y*(m / N) subcarriers are selected sequentially from front to back, with each subcarrier serving as an interval.

[0279] In the second example, the first preset rule can stipulate that it starts from the kth subcarrier in reverse order of the total subcarriers corresponding to the PPDU, and... The number of subcarriers is Y*(m / N) at intervals, and Y*(m / N) subcarriers are selected sequentially from back to front.

[0280] In the third example, the first preset rule can stipulate that the Y*(m / N) subcarriers are symmetrically distributed based on the central subcarrier.

[0281] Specifically, the access point device can start from the first subcarrier, and... Using subcarriers as intervals, Y*(m / N) subcarriers are selected sequentially from front to back. It is then determined whether these Y*(m / N) subcarriers are symmetrically distributed based on the center subcarrier. If symmetrically distributed, these Y*(m / N) subcarriers are designated as the first part of the subcarriers used for beam scanning training. If asymmetrically distributed, the process begins from the second subcarrier... Using subcarriers as intervals, Y*(m / N) subcarriers are selected sequentially from front to back, and it is determined whether the Y*(m / N) subcarriers are symmetrically distributed based on the center subcarrier. This process is repeated until the determined Y*(m / N) subcarriers are symmetrically distributed based on the center subcarrier. Then, the determined Y*(m / N) subcarriers can be used as the first part of the subcarriers for beam scanning training.

[0282] Based on the third example, the time period of the first part in the time domain is m / N of the OFDM symbol period. That is, the first part can form a repetitive signal in the time domain. The site equipment can detect the scanning beam corresponding to the first part through simple time-domain correlation processing to determine the RSSI of the scanning beam corresponding to the first part, thereby improving the detection sensitivity.

[0283] Based on the above description of the first preset rule, compared with the third example, when determining the first part of the subcarriers used for beam scanning training based on the first and second examples, the complexity can be reduced and the implementation simplified. Compared with the first and second examples, when determining the first part of the subcarriers used for beam scanning training based on the third example, the first part of the subcarriers used for beam scanning training can be symmetrically distributed based on the center carrier of the first channel, which can ensure that the first part forms a repetitive signal in the time domain as much as possible, thereby better determining the RSSI of the scanning beam corresponding to the first part and improving the detection sensitivity.

[0284] Based on the above description of the first preset rule, optionally, the first preset rule can be predefined, or the first preset rule can be indicated by the access point device, and this application does not limit it in this regard.

[0285] The first preset rule can be located in the first frame, or the first preset rule can be transmitted separately.

[0286] Based on the above description of the first part, optionally, the access point device can indicate the first part of the PPDU to the site device. That is, the access point device can indicate the configuration information of the first part to the site device, so that the site device can determine the first part of the PPDU based on the configuration information of the first part.

[0287] The configuration information in the first part indicates one or more of the following: the length of the first part, or the number of the first parts.

[0288] The length of the first part can be understood as the number of bits occupied by the first part on the PPDU, or the length of the first part can be understood as the time length of the first part corresponding to a beam, or the length of the first part can be understood as the time length of the first part in the time domain, or the length of the first part can be understood as the number of symbols occupied by the first part.

[0289] The quantity of the first part can be understood as the total number of the first parts included in the PPDU.

[0290] Understandably, the site equipment can determine the total number of first parts in the PPDU and the position of each first part within the PPDU based on the configuration information of the first part. For example, taking the length of the first part as L and the number of first parts as 3 (e.g., the PPDU may include first part 1, first part 2, and first part 3), assuming the starting position of the first part in the PPDU is B0, the specific position of first part 1 in the PPDU can be determined as B0-(B0+L), the specific position of first part 2 in the PPDU as (B0+L)-(B0+2L), and the specific position of first part 3 in the PPDU as (B0+2L)-(B0+3L).

[0291] The starting position of the first part in the PPDU can be predefined, or the starting position of the first part in the PPDU can be determined based on the first field (i.e., the starting position of the first part in the PPDU is the ending position of the first field in the PPDU), or the starting position of the first part in the PPDU can be indicated by the access point device (e.g., the configuration information of the first part can also include the starting position of the first part in the PPDU).

[0292] The configuration information in the first part can be located in the first frame, or the configuration information in the first part can be located in the first field.

[0293] The first field can be referred to in the above description of the first field, and will not be repeated here.

[0294] The first frame can be referred to in the above description of the first frame, and will not be repeated here.

[0295] Based on the configuration information described in the first part, on the one hand, the site device can determine the quantity of the first part, which can minimize the possibility of the access point device sending the first part and the site device stopping receiving it, thus improving communication reliability. On the other hand, the site device can determine the time period for receiving the first part, which can improve resource utilization and reduce the power consumption of the site device.

[0296] Optionally, the first part may also include one or more of the following: identification information of the access point device, information on the number of remaining scanning beams, beam scanning feedback time information, beam identification information, beam sector numbering information, or timing information.

[0297] 1) Identification information of access point equipment

[0298] The identification information of the access point device is used to indicate the identification of the access point device, which enables the site device to determine the access point device corresponding to the first part of the received data based on the identification information of the access point device.

[0299] For example, the identification information of an access point device may indicate the unique identifier of the access point device (such as an 18-bit unique identifier), or the identification information of the access point device may indicate the MAC address of the access point device, or the identification information of the access point device may indicate the Internet Protocol (IP) address of the access point device, or the identification information of the access point device may indicate the number of the access point device.

[0300] Understandably, when multiple access point devices are performing beam scanning, the first part sent by each access point device can carry the identification information of the access point device. Correspondingly, the site device can receive the first part sent by multiple access point devices and determine the access point device corresponding to the received first part based on the identification information of the access point device in the first part. Then, it can send the corresponding beam measurement report to the corresponding access point device. At the same time, it can realize beam scanning of multiple access point devices on high-frequency channels, which can improve the effectiveness of connectivity.

[0301] 2) Remaining scanning beam count information

[0302] The remaining scan beam count information is used to indicate the number of remaining scan beams.

[0303] For example, taking the number of the first part as 3, assuming the remaining scan beam count information indicates 1, the site device can determine that the number of the remaining scan beams is 1, and the site device can continue to wait to receive the first part on the remaining scan beams (or wait to detect the remaining scan beams); or, assuming the remaining scan beam count information indicates 0, the site device can determine that the number of the remaining scan beams is 0, and no longer wait to receive the first part (or no longer wait to detect the remaining scan beams).

[0304] Understandably, the site equipment can determine whether there are any remaining scanning beams and the number of remaining scanning beams based on the remaining scanning beam count information. This allows it to determine whether the access point equipment will continue beam scanning, improving the efficiency of interaction between the site equipment and the access point equipment. At the same time, it can minimize the situation where the access point equipment ends beam scanning while the site equipment is still waiting to determine the RSSI of the scanning beam, reducing resource consumption, improving resource utilization, and lowering the power consumption of the site equipment.

[0305] 3) Beam scanning feedback time information

[0306] Among them, the beam scan feedback time information is used to indicate the time when the site equipment sends out a beam measurement report.

[0307] For example, beam scan feedback time information can indicate a time period, or beam scan feedback time information can indicate a moment (such as a timestamp), or beam scan feedback time information can indicate a moment and a time interval, or beam scan feedback time information can indicate a time interval.

[0308] For example, when the beam scan feedback time information indicates a time period (such as T0-T1), the site equipment can send a beam measurement report to the access point equipment within the (T0-T1) time period.

[0309] For example, when the beam scan feedback time information indicates the time (e.g., T0), the site equipment can send a beam measurement report to the access point equipment at time T0.

[0310] For example, when the beam scan feedback time information indicates the time (e.g., T0) and time interval (e.g., ΔT), the site equipment can send a beam measurement report to the access point equipment within the time period T0-(T0+ΔT).

[0311] For example, when the beam scan feedback time information indicates a time interval (e.g., ΔT), the site equipment can start at the moment of receiving the first part (e.g., T0), and after ΔT, send a beam measurement report at time (T0+ΔT).

[0312] Optionally, the access point device can determine the time to receive the beam measurement report based on the beam scan feedback time information.

[0313] For example, when the beam scan feedback time information indicates a time period (such as T0-T1), the access point device can receive a beam measurement report from the site device within the time period T0-(T1+Δ). Here, Δ represents the maximum delay.

[0314] For example, when the beam scan feedback time information indicates a time (e.g., T0), the access point device can receive a beam measurement report from the site device within the time period T0-(T0+Δ). Here, Δ represents the maximum time delay.

[0315] For example, when the beam scan feedback time information indicates the time (e.g., T0) and time interval (e.g., ΔT), the access point device can receive a beam measurement report from the site device within the time period (T0+ΔT)-(T0+ΔT+Δ). Here, Δ represents the maximum time delay.

[0316] For example, when the beam scan feedback time interval is (e.g., ΔT), the access point device can receive the beam measurement report from the site device within the time period T0 - (T0 + ΔT + 2Δ). Here, T0 is the time when the access point device sends the first part, and Δ represents the maximum time delay.

[0317] Understandably, the access point device can instruct the site device on the beam scan feedback time. Correspondingly, the site device can determine the time to feed back the beam measurement report and send it to the access point device within that time. This minimizes interference from other signals during beam measurement report transmission, improving communication reliability. Furthermore, the access point device can also receive beam measurement reports from the site device within the corresponding time period, effectively improving the interaction efficiency between the two devices. Simultaneously, by receiving beam measurement reports within a defined time frame instead of waiting indefinitely, the access point device can effectively reduce resource consumption, improve resource utilization, and lower its power consumption.

[0318] 4) Beam identification information

[0319] The beam identification information is used to indicate the identifier of the scanning beam, or the beam identification information is used to indicate the number of the scanning beam, or the beam identification information is used to indicate the index of the scanning beam.

[0320] For example, taking the existence of three scanning beams (such as scanning beam 1 being identified as 00, scanning beam 2 as identified as 01, and scanning beam 10 as identified), the identification information of the beam can be represented by two bits. Assuming that the first part 1 corresponds to scanning beam 1, then the bit value of the beam identification information in the first part 1 can be 00; or, assuming that the first part 2 corresponds to scanning beam 2, then the bit value of the beam identification information in the first part 2 can be 01; or, assuming that the first part 3 corresponds to scanning beam 3, then the bit value of the beam identification information in the first part 3 can be 10.

[0321] Understandably, the site equipment can determine the identifier of the scanning beam corresponding to the first part of the received signal based on the beam identification information. When reporting the beam measurement report, it can report the identifier of the scanning beam and the RSSI of the scanning beam. Compared with the site equipment reporting the RSSI of the scanning beam sequentially when reporting the beam measurement report (i.e. without carrying the identification information of the scanning beam), the access point equipment can more accurately determine the RSSI corresponding to different scanning beams, which can improve the accuracy of determining the scanning beam.

[0322] In addition, compared to the site equipment reporting the identifier of the scanning beam and the RSSI of the scanning beam, the site equipment can reduce the transmission overhead by sequentially reporting the RSSI of the scanning beam, thereby improving the effectiveness of communication.

[0323] Unlike beam identification information, when a PPDU includes one or more first parts, the scanning beam corresponding to one or more first parts can also be determined according to the corresponding columns of the unitary matrix. That is, the scanning beam corresponding to different first parts can be determined according to different columns of the unitary matrix.

[0324] For example, the initial scanning beams corresponding to different first parts can be scrambled by different columns of the unitary matrix. The different scrambled codes can be multiplied by the symbols of the subcarriers to obtain the scanning beams corresponding to different first parts.

[0325] For example, taking the scrambling code of the initial scanning beam corresponding to the first part 1 as {+1,+1,+1} and the scrambling code of the initial scanning beam corresponding to the first part 2 as {+1,-1,-1}, and assuming the subcarrier symbol is {3,4,5}, we can determine that the sequence of the scanning beam corresponding to the first part 1 is {+3,+4,+5} and the sequence of the scanning beam corresponding to the first part 2 is {+3,-4,-5}.

[0326] 5) Beam sector numbering information

[0327] Among them, the beam sector numbering information is used to indicate the beam sector number, or the beam sector numbering information is used to indicate the beam sector index.

[0328] For example, taking a scenario with three beam sectors (beam sector 1 numbered 00, beam sector 2 numbered 01, and beam sector 3 numbered 10), assuming the scanning beam corresponding to the first part 1 is located in beam sector 1, then the bit value of the beam sector numbering information in the first part 1 can be 00; or, assuming the scanning beam corresponding to the first part 2 is located in beam sector 2, then the bit value of the beam sector numbering information in the first part 2 can be 01; or, assuming the scanning beam corresponding to the first part 3 is located in beam sector 3, then the bit value of the beam sector numbering information in the first part 3 can be 10.

[0329] Understandably, site equipment can determine the beam sector number based on the beam sector numbering information. When reporting beam measurement reports, it can report the beam sector number and the RSSI of the scanned beam. Correspondingly, access point equipment can determine the scanned beam corresponding to the beam sector number based on the beam sector number, and thus determine the RSSI of that scanned beam. Compared to site equipment sequentially reporting the RSSI of the scanned beam when reporting beam measurement reports (i.e., without carrying the beam sector number information), site equipment can include the beam sector number information when reporting beam measurement reports. This allows access point equipment to more accurately determine the RSSI corresponding to different scanned beams, improving the accuracy of scanned beam identification.

[0330] In addition, compared to site equipment carrying beam sector number information when reporting beam measurement reports, site equipment can reduce transmission overhead by sequentially reporting the RSSI of scanned beams, thereby improving communication efficiency.

[0331] 6) Timing information

[0332] The timing information is used to indicate one or more of the following: the sequence number of the first part among the multiple first parts included in the PPDU, or the number of other first parts in the PPDU that follow the first part.

[0333] In one example, taking the timing information indicating the sequence number of the first part among the multiple first parts included in the PPDU as an example, assuming there are three first parts (the sequence number of first part 1 is 00, the sequence number of first part 2 is 01, and the signal of first part 3 is 10), when the bit value of the timing information is 00, it can be indicated that the sequence number of the current first part among the multiple first parts included in the PPDU is 00, and thus it can be determined that the number of other first parts after the current first part is 2; or, when the bit value of the timing information is 01, it can be indicated that the sequence number of the current first part among the multiple first parts included in the PPDU is 01, and thus it can be determined that the number of other first parts after the current first part is 1; or, when the bit value of the timing information is 10, it can be indicated that the sequence number of the current first part among the multiple first parts included in the PPDU is 10, and thus it can be determined that the number of other first parts after the current first part is 0.

[0334] In another example, taking the timing information indicating the number of other first parts following the first part in the PPDU as an example, assuming there are three first parts, the bit value of the timing information can be set to 00, indicating that the number of other first parts following the current first part is 0; or, the bit value of the timing information can be set to 01, indicating that the number of other first parts following the current first part is 1; or, the bit value of the timing information can be set to 10, indicating that the number of other first parts following the current first part is 2.

[0335] Similarly, timing information can simultaneously indicate the sequence number of the first part in the multiple first parts included in the PPDU, as well as the number of other first parts in the PPDU that are located after the first part. The specific indication method can be referred to the two examples above, and will not be elaborated here.

[0336] Understandably, the site device can determine whether there are other first parts after the currently received first part based on the timing information, thereby determining whether the access point device will continue beam scanning (i.e., if there are other first parts, the access point device continues beam scanning; if there are no other first parts, the access point device ends beam scanning). This can improve the efficiency of interaction between the site device and the access point device, and at the same time, it can avoid situations where the access point device ends beam scanning while the site device is still waiting to detect the scanning beam. This can reduce resource consumption, improve resource utilization, and reduce the power consumption of the site device.

[0337] Based on the description of the identification information, remaining scanning beam count information, beam scanning feedback time information, beam identification information, beam sector numbering information, or timing information of the aforementioned access point device, if the first part includes a UHR-TRN field, such as adding such one or more pieces of information to the UHR-TRN field.

[0338] If the first part includes a UHR-LTF field, the one or more pieces of information may be located in the UHR-LTF field, such as when the one or more pieces of information are added to the UHR-LTF field.

[0339] In the case where the first part includes a UHR-LTF field and a UHR-data field, the one or more pieces of information may be located in the UHR-data field, or the one or more pieces of information may be located in the UHR-LTF field, or some of the one or more pieces of information may be located in the UHR-data field and the other part of the information may be located in the UHR-LTF field.

[0340] In the case where the first part includes the UHR-STF field, the UHR-LTF field, and the UHR-data field, the one or more pieces of information may be located in the UHR-data field, or the one or more pieces of information may be located in the UHR-STF field, or the one or more pieces of information may be located in the UHR-LTF field, or some of the one or more pieces of information may be located in the UHR-data field and the other part may be located in the UHR-LTF field, or some of the one or more pieces of information may be located in the UHR-data field and the other part may be located in the UHR-STF field.

[0341] The above description is merely an example, and the above one or more pieces of information can be located anywhere in the first part, and this application does not limit this.

[0342] Optionally, the access point device can also indicate the time interval information of beam scanning to the site device. Accordingly, the site device can detect the scanning beam within the time interval of beam scanning training indicated by the time interval information of beam scanning and determine the beam measurement report.

[0343] Specifically, the first frame may include beam scanning time interval information; or, the first field may include beam scanning time interval information.

[0344] Understandably, the site equipment can determine the time interval of beam scanning based on the time interval information of beam scanning, and receive the first part of the scanning beam within the time interval of beam scanning. This allows the site equipment to wait to detect the scanning beam within a certain time period, which can effectively reduce resource consumption and reduce the power consumption of the site equipment.

[0345] The time interval information for beam scanning can be based on the target beacon transmission time (TBTT) corresponding to the second channel.

[0346] In this context, TBTT is actually a period of sending / receiving beacon frames after a certain time. The duration of this period is determined by the interval between beacon frames. For example, an access point device can periodically send beacon frames on the second channel, and a site device can receive these beacon frames and use them for time synchronization.

[0347] It is understandable that when the access point device performs beam scanning on the first channel, it can periodically send beacon frames on the second channel to achieve time synchronization with the site device, providing a feasible solution for achieving time synchronization between the access point device and the site device.

[0348] Based on the above description of the first part and the first field, this application provides a possible embodiment based on the PPDU frame format, as follows: Figure 10 As shown, the first field can be the UHR-SIG field. Figure 10 In (a), the first part can be a UHR-TRN field; Figure 10 In (b) of the above, the first part can be a UHR-LTF field; Figure 10 In (c) of the document, the first part may include the UHR-LTF field and the UHR-data field; Figure 10 In section (d), the first part may include the UHR-STF field, the UHR-LTF field, and the UHR-data field; Figure 10 In (e), the first part may include the UHR-STF field and the UHR-LTF field.

[0349] This application proposes two possible implementation methods for the beam scanning process:

[0350] In the first possible embodiment, the frame format is PPDU. Figure 10 The frame format shown in (a) can include configuration information for the UHR-TRN field in the UHR-SIG field (e.g., the configuration information for the UHR-TRN field can indicate the length and number of UHR-TRN fields). For example, see below. Figure 11 As shown, the access point device can transmit PPDUs on a high-frequency channel, and correspondingly, the site device can receive PPDUs on a high-frequency channel. Specifically, the access point device can map UHR-TRN fields onto different scanning beams for transmission (e.g., the first UHR-TRN field corresponds to scanning beam 1, the second UHR-TRN field to scanning beam 2, and the third UHR-TRN field to scanning beam 3). Correspondingly, the site device can determine the time interval for receiving UHR-TRN fields based on the end position of the UHR-SIG field in the PPDU and the configuration information of the UHR-TRN fields. It can receive UHR-TRN fields based on different scanning beams in different time intervals and determine the RSSI of the corresponding scanning beam. Furthermore, the site device can send beam measurement reports to the access point device on a low-frequency channel (e.g., the beam measurement report may include the RSSI of scanning beam 1, the RSSI of scanning beam 2, and the RSSI of scanning beam 3).

[0351] based on Figure 11 It can be seen that the time-domain correlation peak corresponding to scanning beam 2 is the highest, that is, the RSSI of scanning beam 2 is the largest, and the access point device can determine that scanning beam 2 is the beam used to communicate with the site device.

[0352] In a second possible embodiment, the frame format of PPDU is... Figure 10 The frame format shown in (d) can include configuration information for the first part (such as the length and number of the first part). For example, see the following: Figure 12The access point device can transmit PPDUs on a high-frequency channel, and correspondingly, the site device can receive PPDUs on a high-frequency channel. Specifically, the access point device can map the first part onto different scanning beams for transmission (e.g., first part 1 corresponds to scanning beam 1, first part 2 corresponds to scanning beam 2, and first part 3 corresponds to scanning beam 3). Correspondingly, the site device can determine the time interval for receiving the first part based on the end position of the UHR-SIG field in the PPDU and the configuration information of the first part. It can receive the first part based on different scanning beams in different time intervals and determine the RSSI of the scanning beam corresponding to the first part. Furthermore, the site device can send a beam measurement report to the access point device on a low-frequency channel (e.g., the beam measurement report may include the RSSI of scanning beam 1, the RSSI of scanning beam 2, and the RSSI of scanning beam 3).

[0353] based on Figure 12 It can be seen that the time-domain correlation peak corresponding to scanning beam 2 is the highest, that is, the RSSI of scanning beam 2 is the largest, and the access point device can determine that scanning beam 2 communicates with the site device.

[0354] based on Figure 5 The communication method shown allows the access point device to perform beam scanning on a high-frequency channel. Since the available channel bandwidth of a high-frequency channel is relatively large (e.g., 1280MHz, 640MHz, 320MHz, etc.), transmitting the first part over a wider channel bandwidth reduces the receiver's sensitivity. Therefore, this application also proposes a communication method where the access point device can transmit the first part over a narrower channel bandwidth to improve the receiver's sensitivity. Specifically, this can be implemented as follows: Figure 13 As shown:

[0355] S1301. The access point device sends a second frame to the site device on a low-frequency channel; correspondingly, the site device receives the second frame from the access point device on a low-frequency channel.

[0356] The second frame is used to indicate the first bandwidth of the first part of the high-frequency channel used for beam scanning training.

[0357] The size of the first bandwidth is less than or equal to a preset threshold.

[0358] For example, the size of the first bandwidth can be 20MHz.

[0359] The preset threshold can be predefined, or it can be determined based on the actual communication scenario or communication situation and is not restricted.

[0360] For example, the preset threshold can be 20MHz.

[0361] S1302. The access point device transmits PPDU on the first bandwidth of the high-frequency channel; correspondingly, the site device receives PPDU on the first bandwidth of the high-frequency channel.

[0362] Based on S1301 and S1302, the access point device can perform narrowband beam scanning. Due to selective fading in the channel frequency domain, the access point device can also perform wideband beam scanning, as shown in S1303-S1304:

[0363] S1303. The access point device sends a third frame to the site device on the low-frequency channel; correspondingly, the site device receives the third frame from the access point device on the low-frequency channel.

[0364] The third frame is used to indicate the second bandwidth of the first part on the high-frequency channel used for beam scanning training.

[0365] The second bandwidth is greater than a preset threshold.

[0366] For example, the size of the second bandwidth can be 40MHz.

[0367] S1304. The access point device transmits PPDU on the second bandwidth of the high-frequency channel; the site device receives PPDU on the second bandwidth of the high-frequency channel.

[0368] based on Figure 13 The communication method shown can execute only S1301 and S1302, only S1303 and S1304, or S1301-S1304 during beam scanning. This application does not limit the execution of these methods.

[0369] Different from the above Figures 5-13 In addition to the communication method shown, this application also proposes a communication method in which the access point device can transmit PPDUs in DSSS format on a high-frequency channel to achieve beam scanning on the high-frequency channel. The specific steps are as follows: Figure 14 As shown:

[0370] S1401, The access point device generates a PPDU.

[0371] The frame format of the PPDU is DSSS.

[0372] For example, the frame of a PPDU can be in 802.11b format.

[0373] Among them, PPDU is based on OFDM modulation.

[0374] Among them, PPDU is used for beam scanning.

[0375] S1402. The access point equipment transmits PPDU on the high-frequency channel; correspondingly, the site equipment receives PPDU on the high-frequency channel.

[0376] The access point device can map the PPDU onto the scanning beam for transmission; correspondingly, the site device can receive the corresponding PPDU based on the scanning beam.

[0377] It is understandable that access point equipment can transmit one or more PPDUs on a high-frequency channel. Different PPDUs can be located in different scanning beams, and correspondingly, site equipment can receive the corresponding PPDUs based on different scanning beams.

[0378] S1403. The site equipment determines the beam measurement report based on the PPDU.

[0379] Specifically, the site equipment can receive the corresponding PPDU based on the scanning beam, determine the RSSI of the PPDU (which can also be understood as the RSSI of the scanning beam corresponding to the PPDU), and then determine the beam measurement report based on the RSSI of the scanning beam corresponding to the PPDU.

[0380] Furthermore, the site equipment can send a beam measurement report to the access point equipment; correspondingly, the access point equipment can receive the beam measurement report from the site equipment and determine the beam used for communication based on the beam measurement report (that is, when the access point equipment communicates with the site equipment, it can transmit data and signaling based on the beam used for communication to improve the reliability of communication).

[0381] S1403 can be referred to the description of S503 above, and will not be repeated here.

[0382] based on Figure 14 The communication method shown allows the access point device to perform OFDM modulation on DSSS format PPDUs. That is, the access point device can reuse a low-frequency OFDM modulation mode to perform OFDM modulation on DSSS format PPDUs on a high-frequency channel. The access point device can achieve beam measurement and communication with the site equipment at both high and low frequencies through a single modulation mode. This enables high- and low-frequency integrated design reuse, thereby reducing the complexity of beam measurement and communication between the access point device and the site at both low and high frequencies.

[0383] based on Figure 14 In the communication method shown, optionally, the access point device can indicate to the site device that the frame format of the PPDU is DSSS format.

[0384] Specifically, the access point device can send indication information to the site device on a low-frequency channel before sending the PPDU; correspondingly, the site device can receive the indication information from the access point device on a low-frequency channel.

[0385] The indication information is used to indicate that the frame format of the PPDU is DSSS format.

[0386] In one example, taking the indication information occupying one bit as an example, the bit value can be set to 1 to indicate that the PPDU frame format is DSSS format; the bit value can be set to 0 to indicate that the PPDU frame format is not DSSS format. Alternatively, the bit value can be set to 0 to indicate that the PPDU frame format is DSSS format; the bit value can be set to 1 to indicate that the PPDU frame format is not DSSS format.

[0387] In another example, when the access point device sends indication information, it can indicate that the frame format of the PPDU is DSSS format; when the access point device does not send indication information, it can indicate that the frame format of the PPDU is not DSSS format. For example, when the access point device sends indication information, taking the indication information occupying one bit as an example, the bit value can be set to 1 to indicate that the frame format of the PPDU is DSSS format; or, the bit value can be set to 0 to indicate that the frame format of the PPDU is DSSS format.

[0388] Optionally, the access point device can also indicate the configuration information of the PPDU to the site device.

[0389] Specifically, the access point device can send the configuration information of the PPDU to the site device on a low-frequency channel before sending the PPDU; correspondingly, the site device can receive the configuration information of the PPDU from the access point device on a low-frequency channel.

[0390] The configuration information of the PPDU is used to indicate one or more of the following: the length of the PPDU, or the number of PPDUs.

[0391] The length of a PPDU can be understood as the time length of the PPDU corresponding to the scanning beam, or the time length of the PPDU in the time domain, or the number of symbols occupied by the PPDU.

[0392] The configuration information of the PPDU can be located in the first frame, or the configuration information of the PPDU can be transmitted separately without restriction.

[0393] The first frame can be referred to in the above description of the first frame, and will not be repeated here.

[0394] Optionally, the PPDU may include one or more of the following: access point device identification information, remaining scan beam count information, beam scan feedback time information, beam identification information, beam sector numbering information, or timing information.

[0395] The identification information of the access point device, the number of remaining scanning beams, the beam scanning feedback time, the beam identification information, or the beam sector numbering information can be found in the above description of the identification information of the access point device, the number of remaining scanning beams, the beam scanning feedback time, the beam identification information, or the beam sector numbering information, and will not be repeated here.

[0396] The timing information is used to indicate one or more of the following: the sequence number of the PPDU among multiple PPDUs sent by the access point device, or the number of other PPDUs following the PPDU among multiple PPDUs sent by the access point device.

[0397] In one example, taking the timing information indicating the sequence number of the current PPDU among multiple PPDUs sent by the access point device as an example, assuming there are three PPDUs (PPDU1 with sequence number 00, PPDU2 with sequence number 01, and PPDU3 with sequence number 10), when the bit value of the timing information is 00, it can be indicated that the sequence number of the current PPDU among multiple PPDUs sent by the access point device is 00, and thus the number of other PPDUs following the current PPDU can be determined to be 2; or, when the bit value of the timing information is 01, it can be indicated that the sequence number of the current PPDU among multiple PPDUs sent by the access point device is 01, and thus the number of other PPDUs following the current PPDU can be determined to be 1; or, when the bit value of the timing information is 10, it can be indicated that the sequence number of the current PPDU among multiple PPDUs sent by the access point device is 10, and thus the number of other PPDUs following the current PPDU can be determined to be 0.

[0398] In another example, taking the timing information indicating the number of other PPDUs following the current PPDU as an example, assuming there are three PPDUs, the bit value of the timing information can be set to 00, indicating that the number of other PPDUs following the current PPDU is 0; or, the bit value of the timing information can be set to 01, indicating that the number of other PPDUs following the current PPDU is 1; or, the bit value of the timing information can be set to 10, indicating that the number of other PPDUs following the current PPDU is 2.

[0399] Based on the above Figure 14The communication method shown allows the access point device to perform beam scanning on a high-frequency channel. Since the available channel bandwidth of a high-frequency channel is relatively large, transmitting PPDUs over a wide channel bandwidth reduces receiver sensitivity. Therefore, this application also proposes a communication method whereby the access point device can transmit PPDUs over a narrower channel bandwidth to improve receiver sensitivity. Specifically, this method can be as follows: Figure 15 As shown:

[0400] S1501. The access point device sends a second frame to the site device on a low-frequency channel; correspondingly, the site device receives the second frame from the access point device on a low-frequency channel.

[0401] The second frame is used to indicate the first bandwidth of the PPDU on the high-frequency channel for beam scanning training.

[0402] The size of the first bandwidth is less than or equal to a preset threshold.

[0403] For example, the size of the first bandwidth can be 20MHz.

[0404] S1502. The access point device transmits PPDU on the first bandwidth of the high-frequency channel; correspondingly, the site device receives PPDU on the first bandwidth of the high-frequency channel.

[0405] Based on S1501 and S1502, the access point device can perform narrowband beam scanning. Due to selective fading in the channel frequency domain, the access point device can also perform wideband beam scanning, as detailed in S1503-S1504 below:

[0406] S1503. The access point device sends a third frame to the site device on the low-frequency channel; correspondingly, the site device receives the third frame from the access point device on the low-frequency channel.

[0407] The third frame is used to indicate the second bandwidth of the PPDU on the high-frequency channel for beam scanning training.

[0408] The second bandwidth is greater than a preset threshold.

[0409] For example, the size of the second bandwidth can be 40MHz.

[0410] S1504. The access point device transmits PPDU on the second bandwidth of the high-frequency channel; the site device receives PPDU on the second bandwidth of the high-frequency channel.

[0411] based on Figure 15The communication method shown can execute only S1501 and S1502, only S1503 and S1504, or S1501-S1504 during beam scanning. This application does not limit the execution of these methods.

[0412] Based on the description of the above communication method, it can enable low-frequency channel to assist high-frequency channel in beam scanning training. For example, the access point device can transmit a first frame on the low-frequency channel to instruct the site device to determine information related to high-frequency channel beam scanning training. Alternatively, the site device can transmit a beam measurement report on the low-frequency channel to instruct the access point device to determine the beam used for communication on the high-frequency channel based on the beam measurement report. The communication method shown in this application can also be used for a first link to assist a second link in beam scanning training. The first link and the second link can be links of different types or the same type. For example, the first link can be an optical communication link, and the second link can be a millimeter-wave link. That is, beam scanning training can be performed based on an optical communication link to assist a millimeter-wave link.

[0413] The various embodiments of this application can be implemented independently or in combination, without limitation. Unless otherwise specified or in conflict of logic, the terminology and / or descriptions between the different embodiments provided in this application are consistent and can be referenced mutually. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0414] It is understood that in the embodiments of this application, the executing entity may perform some or all of the steps in the embodiments of this application. These steps or operations are merely examples, and the embodiments of this application may also perform other operations or variations thereof. Furthermore, the various steps may be executed in different orders as presented in the embodiments of this application, and it is not necessarily necessary to execute all the operations in the embodiments of this application.

[0415] The foregoing primarily describes the solutions provided in this application from the perspective of device-to-device interaction. It is understood that each device, in order to achieve the aforementioned functions, includes corresponding hardware structures and / or software modules for executing each function. Those skilled in the art will readily recognize that, in conjunction with the algorithm steps of the examples described in the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0416] This application embodiment can divide each device into functional modules according to the above method example. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. The module division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0417] When dividing each function into modules according to its corresponding function. Figure 16 An access point device 160 is shown, which can perform the above-described... Figure 5 ,and Figures 13-15 The actions performed by the access point device in the method shown, and all related content of each step involved in the above method embodiments, can be referenced from the functional description of the corresponding functional module. The technical effects that can be obtained can be referred to the above method embodiments, and will not be repeated here.

[0418] The access point device 160 may include a transceiver module 1601 and a processing module 1602. Exemplarily, the access point device 160 may be a communication device, or a chip or other combination device or component having the aforementioned access point device functions applied in a communication device. When the access point device 160 is a communication device, the transceiver module 1601 may be a transceiver, which may include an antenna and radio frequency circuits, etc.; the processing module 1602 may be a processor (or processing circuit), such as a baseband processor, which may include one or more CPUs. When the access point device 160 is a component having the aforementioned access point device functions, the transceiver module 1601 may be a radio frequency unit; the processing module 1602 may be a processor (or processing circuit), such as a baseband processor. When the access point device 160 is a chip system, the transceiver module 1601 may be an input / output interface of a chip (e.g., a baseband chip); the processing module 1602 may be a processor (or processing circuit) of the chip system, and may include one or more central processing units. It should be understood that the transceiver module 1601 in the embodiments of this application can be implemented by a transceiver or transceiver-related circuit components; the processing module 1602 can be implemented by a processor or processor-related circuit components (or, referred to as processing circuit).

[0419] For example, transceiver module 1601 can be used to perform... Figure 5 ,and Figures 13-15 In the illustrated embodiment, all transmit and receive operations performed by the access point device, and / or other processes used to support the technology described herein; the processing module 1602 can be used to perform Figure 5 ,and Figures 13-15The embodiments shown include all operations performed by the access point device other than the transmit and receive operations, and / or other processes used to support the techniques described herein.

[0420] Figure 17 A site device 170 is shown, which can perform the above-described actions. Figure 5 ,and Figures 13-15 The actions performed by the site device in the method shown, and all related content of each step involved in the above method embodiments, can be referenced from the functional description of the corresponding functional module. The technical effects that can be obtained can be referred to the above method embodiments, and will not be repeated here.

[0421] The site device 170 may include a transceiver module 1701 and a processing module 1702. Exemplarily, the site device 170 may be a communication device, or a chip or other combination of devices or components having the aforementioned site device functions applied in a communication device. When the site device 170 is a communication device, the transceiver module 1701 may be a transceiver, which may include an antenna and radio frequency circuits, etc.; the processing module 1702 may be a processor (or processing circuit), such as a baseband processor, which may include one or more CPUs. When the site device 170 is a component having the aforementioned site device functions, the transceiver module 1701 may be a radio frequency unit; the processing module 1702 may be a processor (or processing circuit), such as a baseband processor. When the site device 170 is a chip system, the transceiver module 1701 may be an input / output interface of a chip (e.g., a baseband chip); the processing module 1702 may be a processor (or processing circuit) of the chip system, and may include one or more central processing units. The transceiver module 1701 in this embodiment can be implemented by a transceiver or transceiver-related circuit components; the processing module 1702 can be implemented by a processor or processor-related circuit components (or, referred to as processing circuit).

[0422] For example, transceiver module 1701 can be used to perform... Figure 5 ,and Figures 13-15 In the illustrated embodiment, all transmit and receive operations performed by the site device, and / or other processes used to support the techniques described herein; the processing module 1702 can be used to perform Figure 5 ,and Figures 13-15 The embodiments shown include all operations performed by the site device other than the send and receive operations, and / or other processes used to support the techniques described herein.

[0423] As another feasible approach Figure 16The transceiver module 1601 can be replaced by a transceiver unit, which can integrate the functions of the transceiver module 1601; the processing module 1602 can be replaced by a processor, which can integrate the functions of the processing module 1602. Furthermore, Figure 16 The access point device 160 shown may also include a memory. Alternatively, Figure 17 The transceiver module 1701 can be replaced by a transceiver unit, which can integrate the functions of the transceiver module 1701; the processing module 1702 can be replaced by a processor, which can integrate the functions of the processing module 1702. Furthermore, Figure 17 The site device 170 shown may also include a memory.

[0424] Alternatively, when the processing module 1602 is replaced by a processor and the transceiver module 1601 is replaced by a transceiver, the access point device 160 involved in the embodiments of this application can also be... Figure 18 The communication device 180 shown. Alternatively, when the processing module 1702 is replaced by a processor and the transceiver module 1701 is replaced by a transceiver, the site device 170 involved in the embodiments of this application can also be Figure 18 The communication device 180 shown.

[0425] The processor can be logic circuit 1801, and the transceiver can be interface circuit 1802. Furthermore, Figure 18 The communication device 180 shown may also include a memory 1803.

[0426] This application also provides a computer program product that, when executed by a computer, can implement the functions of any of the above method embodiments.

[0427] This application also provides a computer program that, when executed by a computer, can implement the functions of any of the above method embodiments.

[0428] This application also provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be implemented by a computer program instructing related hardware. This program can be stored in the computer-readable storage medium, and when executed, it can include the processes of the above method embodiments. The computer-readable storage medium can be an internal storage unit of the terminal (including a data sending end and / or a data receiving end) of any of the foregoing embodiments, such as the terminal's hard disk or memory. The computer-readable storage medium can also be an external storage device of the terminal, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the terminal. Further, the computer-readable storage medium can include both the terminal's internal storage unit and external storage devices. The computer-readable storage medium is used to store the computer program and other programs and data required by the terminal. The computer-readable storage medium can also be used to temporarily store data that has been output or will be output.

[0429] The terms "first" and "second," etc., used in the specification, claims, and drawings of this application are used to distinguish different objects, not to describe a specific order. "First" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this embodiment, unless otherwise stated, "a plurality of" means two or more.

[0430] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0431] In this application, "at least one (item)" means one or more. "More than one" means two or more. "At least two (items)" means two or three or more. "And / or" is used to describe the relationship between related objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple. "...when" and "if" both mean that a corresponding action will be taken under certain objective circumstances, not a time limit, nor do they require a judgment action at the time of implementation, nor do they imply any other limitations.

[0432] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner to facilitate understanding.

[0433] In this application, "sending information to...(terminal device)" can be understood as the destination of the information being the terminal device. This can include sending information directly or indirectly to the terminal device. "Receiving information from...(terminal device)" can be understood as the source of the information being the terminal device, and can include receiving information directly or indirectly from the terminal device. Information may undergo necessary processing between the source and destination, such as format changes, but the destination can understand the valid information from the source.

[0434] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0435] In the several embodiments provided in this application, the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0436] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0437] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0438] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of this application embodiment, or all or part of the technical solution, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

Claims

1. A communication method characterized by comprising: comprising: generating a physical layer protocol data unit (PPDU); wherein the PPDU comprises a first part; the first part is based on orthogonal frequency division multiplexing (OFDM) modulation; the first part is used for beam sweeping, and subcarriers used for beam sweeping training of the first part comprise m subcarriers in every N subcarriers; N is an integer greater than 1, and m is a positive integer less than N; transmitting the PPDU on a high frequency channel.

2. A communication method characterized by comprising: comprising: receiving a physical layer protocol data unit (PPDU) on a high frequency channel; wherein the PPDU comprises a first part; the first part is based on orthogonal frequency division multiplexing (OFDM) modulation; the first part is used for beam sweeping, and subcarriers used for beam sweeping training of the first part comprise m subcarriers in every N subcarriers; N is an integer greater than 1, and m is a positive integer less than N; determining a beam measurement report according to the PPDU.

3. The method of claim 1 or 2, wherein subcarriers used for beam sweeping training of the first part are symmetrically distributed based on a center subcarrier.

4. The method of any one of claims 1-3, wherein the first part further comprises one or more of: identification information of an access point device, remaining number of scanning beams information, beam sweeping feedback time information, identification information of a beam, numbering information of a beam sector, or timing information; the beam sweeping feedback time information is used to indicate a time at which a station device feeds back a beam measurement report; the timing information is used to indicate one or more of: a sequence number of the first part in a plurality of first parts included in the first PPDU, or a number of other first parts located after the first part in the PPDU.

5. The method of any one of claims 1-4, wherein the first part comprises an ultra-high reliability-training (UHR-TRN) field; or the first part comprises an ultra-high reliability-long training sequence (UHR-LTF) field; or the first part comprises an ultra-high reliability-long training sequence (UHR-LTF) field and an ultra-high reliability-data (UHR-data) field; or the first part comprises an ultra-high reliability-short training sequence (UHR-STF) field, an ultra-high reliability-long training sequence (UHR-LTF) field, and an ultra-high reliability-data (UHR-data) field.

6. The method of any one of claims 1-5, wherein a plurality of subcarriers in the subcarriers used for beam sweeping training of the first part are used to modulate the same information.

7. The method according to any one of claims 1 to 6, characterized in that, the PPDU comprises one or more first parts, corresponding scanning beams of the one or more first parts are determined according to corresponding columns of a unitary matrix.

8. The method of any one of claims 1, 3-7, wherein the PPDU further comprises a first field, the first field comprises indication information; the first field is located before the first part; or before transmitting the PPDU, indication information is transmitted on a low frequency channel; the indication information is used to indicate the m and the N.

9. The method of any of claims 1, 3-7, wherein: before transmitting the PPDU, a first frame is transmitted on a low frequency channel; the first frame includes configuration information for the first portion; or the PPDU further includes a first field, the first field including the configuration information for the first portion; and wherein the configuration information for the first portion indicates one or more of: a length of the first portion, or a number of the first portions.

10. The method of any of claims 7-9, wherein: the first field is an Ultra High Reliability - Signal, UHR-SIG, field.

11. The method of any of claims 9 or 10, wherein: the first frame further includes time interval information for beam sweeping.

12. The method of claim 11, wherein: the time interval information for beam sweeping is based on a beacon scheduled transmission time, TBTT, corresponding to the low frequency channel.

13. The method of claim 12, wherein: before transmitting the PPDU on the high frequency channel, the method further comprises: transmitting a second frame on the low frequency channel; wherein the second frame indicates a first bandwidth of the first portion for beam sweeping training on the high frequency channel, the first bandwidth having a size less than or equal to a predetermined threshold.

14. The method of claim 13, wherein: the method further comprises: transmitting a third frame on the low frequency channel; wherein the third frame indicates a second bandwidth of the first portion for beam sweeping training on the high frequency channel, the second bandwidth having a size greater than the predetermined threshold.

15. The method of claim 14, wherein: the method further comprises: receiving a beam measurement report on the low frequency channel.

16. The method of any of claims 2-7, wherein: the PPDU further includes a first field, the first field including indication information; the first field is located before the first portion; or, before receiving the PPDU, the indication information is received on a low frequency channel; wherein the indication information indicates the m and the N; and wherein the method further comprises: determining, based on the indication information, subcarriers of the first portion for beam sweeping training.

17. The method of any of claims 2-7, 16, wherein: before receiving the PPDU, a first frame is received on a low frequency channel; the first frame includes configuration information for the first portion; or the PPDU includes a first field, the first field including the configuration information for the first portion; wherein the configuration information for the first portion indicates one or more of: a length of the first portion, or a number of the first portions; and wherein the method further comprises: determining, based on the configuration information for the first portion, the first portion of the PPDU for beam measurement training.

18. The method of claim 17, wherein: receiving the PPDU on the high frequency channel comprises: receiving a second frame on the low frequency channel; wherein the second frame indicates a first bandwidth of the first portion for beam sweeping training on the high frequency channel, the first bandwidth having a size less than or equal to a predetermined threshold; and receiving the PPDU on the first bandwidth of the high frequency channel.

13. The method of any one of claims 1, 3-12, wherein, 19. The method of claim 18, wherein: the method further comprises: ​ 14. The method of claim 13, wherein, ​ ​ 15. The method of any one of claims 1, 3-14, wherein, ​ ​ ​ ​ ​ ​ ​ ​ 18. The method of any one of claims 2-7, 15-17, wherein, ​ ​ ​ 19. The method of any one of claims 2-7, 15-18, wherein, ​ receiving a third frame on a low frequency channel; wherein the third frame is used to indicate a second bandwidth of the first part on the high frequency channel for beam sweeping training, and a size of the second bandwidth is greater than the preset threshold; receiving the PPDU on the second bandwidth of the high frequency channel.

20. The method of any one of claims 2-7, 15-19, wherein, The method further includes: transmitting the beam measurement report on a low frequency channel.

21. A method of communication, comprising: comprising: generating a physical layer protocol data unit (PPDU); wherein a frame format of the PPDU is a direct sequence spread spectrum (DSSS) format, the PPDU is based on orthogonal frequency division multiplexing (OFDM) modulation, and the PPDU is used for beam sweeping; transmitting the PPDU on a high frequency channel.

22. A method of communication, comprising: comprising: receiving a physical layer protocol data unit (PPDU) on a high frequency channel; wherein a frame format of the PPDU is a direct sequence spread spectrum (DSSS) format, the PPDU is based on orthogonal frequency division multiplexing (OFDM) modulation, and the PPDU is used for beam sweeping; determining a beam measurement report according to the PPDU.

23. The method of claim 21 or 22, wherein the PPDU comprises one or more of: identification information of an access point device, remaining scanning beam number information, beam sweeping feedback time information, identification information of a beam, beam sector number information, or timing information; the beam sweeping feedback time information is used to indicate a time for a station device to feed back a beam measurement report; the timing information is used to indicate one or more of: a sequence number of the PPDU in a plurality of PPDUs transmitted by an access point device, or a number of other PPDUs after the PPDU in a plurality of PPDUs transmitted by the access point device.

24. The method of any one of claims 21-23, wherein, there is one or more PPDUs, the scanning beams corresponding to the one or more PPDUs are determined according to corresponding columns of a unitary matrix.

25. The method of any one of claims 21, 23-24, wherein, Before the transmitting the PPDU on a high frequency channel, the method further includes: transmitting indication information on a low frequency channel; wherein the indication information is used to indicate that the frame format of the PPDU is a DSSS format.

26. The method of any one of claims 21, 23-25, wherein, Before the transmitting the PPDU on a high frequency channel, the method further includes: transmitting a first frame on a low frequency channel; wherein the first frame comprises one or more of: configuration information of the PPDU, or time interval information of beam sweeping, the configuration information of the PPDU is used to indicate one or more of: a length of the PPDU, or a number of the PPDU.

27. The method of any one of claims 21, 23-26, wherein, Before the transmitting the PPDU on a high frequency channel, the method further includes: transmitting a second frame on a low frequency channel; wherein the second frame is used to indicate a first bandwidth of the PPDU on the high frequency channel for beam sweeping training, and a size of the first bandwidth is less than or equal to a preset threshold.

28. The method of claim 27, wherein, The method further includes: transmitting a third frame on the low frequency channel; wherein the third frame is used to indicate a second bandwidth of the PPDU on the high frequency channel for beam sweeping training, and a size of the second bandwidth is greater than the preset threshold.

29. The method of any one of claims 21, 23-28, wherein, The method further includes: receiving a beam measurement report on a low frequency channel.

30. The method of any one of claims 22-24, wherein, The method further comprises, before receiving the PPDU on the high frequency channel: receiving indication information on the low frequency channel; wherein the indication information is used to indicate that the frame format of the PPDU is a DSSS format; determining the frame format of the PPDU according to the indication information.

31. The method of any one of claims 22-24, 30, wherein, The method further comprises, before receiving the PPDU on the high frequency channel: receiving a first frame on the low frequency channel; wherein the first frame comprises one or more of the following: configuration information of the PPDU, or time interval information of beam sweeping, the configuration information of the PPDU being used to indicate one or more of the following: length of the PPDU, or number of the PPDU.

32. The method of any one of claims 22-24, 30-31, wherein, The method further comprises, receiving the PPDU on the high frequency channel: receiving a second frame on the low frequency channel; wherein the second frame is used to indicate a first bandwidth of the PPDU on the high frequency channel for beam sweeping training, the first bandwidth having a size less than or equal to a preset threshold; receiving the PPDU on the first bandwidth of the high frequency channel.

33. The method of any one of claims 22-24, 30-32, wherein, The method further comprises: receiving a third frame on the low frequency channel; wherein the third frame is used to indicate a second bandwidth of the PPDU on the high frequency channel for beam sweeping training, the second bandwidth having a size greater than the preset threshold; receiving the PPDU on the second bandwidth of the high frequency channel.

34. The method of any one of claims 22-24, 30-33, wherein, The method further comprises: transmitting the beam measurement report on the low frequency channel.

35. A communications device, characterized by The communication device comprises a processor; the processor is configured to run computer programs or instructions, or is configured to pass through a logic circuit, so as to enable the communication device to perform the communication method of any one of claims 1, 3-15, or to enable the communication device to perform the communication method of any one of claims 2-7, 16-20, or to enable the communication device to perform the communication method of any one of claims 21, 23-29, or to enable the communication device to perform the communication method of any one of claims 22-24, 30-34.

36. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions or programs, when the computer instructions or programs are run on a computer, so as to enable the communication method of any one of claims 1, 3-15, or to enable the communication device to perform the communication method of any one of claims 2-7, 16-20, or to enable the communication method of any one of claims 21, 23-29, or to enable the communication device to perform the communication method of any one of claims 22-24, 30-34.

37. A computer program product, characterised in that, The computer program product comprises computer instructions; when part or all of the computer instructions are run, the communication method of any one of claims 1, 3-15 is performed, or the communication method of any one of claims 2-7, 16-20 is performed, or the communication method of any one of claims 21, 23-29 is performed, or the communication method of any one of claims 22-24, 30-34 is performed.

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