Communication method and communication apparatus

Abstract

Provided in the present application are a communication method and a communication apparatus. The method comprises: sending a first PPDU, wherein the first PPDU comprises a first field used for beam training, a frequency domain range corresponding to the first field comprises a first frequency domain sub-range and a second frequency domain sub-range, and the sum of the first frequency domain sub-range and the second frequency domain sub-range is less than or equal to a first frequency domain range corresponding to the first PPDU; and sending a first beam set within the first frequency domain sub-range of the first field, and sending a second beam set within the second frequency domain sub-range of the first field, wherein a first beam sent within the first frequency domain sub-range at a first moment and a second beam sent within the second frequency domain sub-range at the first moment have different directions. In the communication method, fields in PPDUs that are used for beam training correspond to a plurality of frequency domain ranges, and at least one different beam can be sent within the frequency domain ranges at the same moment, thus realizing a frequency-division beam training scheme, and further reducing the overheads of beam training.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on October 31, 2023, with application number 202311437659.9 and application name “Communication Method and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and more particularly, to a communication method and a communication device. Background Art

[0003] 802.11 is currently one of the mainstream wireless access standards for wireless local area networks (WLANs). The 802.11 standard includes standards operating below 7 GHz, such as 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, 802.11be, and 802.11bn. It also includes high-frequency standards (e.g., 45 GHz and above), such as 802.11ad and 802.11ay, which operate near 60 GHz, and the integrated mmWave standard that may be developed in the future.

[0004] In high-frequency communications, due to significant signal path loss, at least one of two devices typically uses directional communication. When using directional beam transmission (e.g., directional transmit and / or directional receive), beam training can be performed using sector-level sweeps (SLS).

[0005] Current beam training technologies typically use a time-division approach to train beams in either the transmit or receive direction. This approach incurs significant resource overhead, leading to a pressing need to reduce the overhead.

[0006] Summary of the Invention

[0007] The present application provides a communication method to reduce the overhead of beam training.

[0008] In a first aspect, a communication method is provided. The method may be executed by a first site, or may be executed by a component (such as a chip or circuit) of the first site, without limitation.

[0009] The communication method includes: sending a first physical layer protocol data unit PPDU, the first PPDU including a first field for beam training, the frequency domain range corresponding to the first field including a first sub-frequency domain range and a second sub-frequency domain range, the first sub-frequency domain range and the second sub-frequency domain range have non-overlapping parts, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the first frequency domain range corresponding to the first PPDU; sending a first beam set within the first sub-frequency domain range of the first field, and sending a second beam set within the second sub-frequency domain range of the first field, wherein the first beam sent within the first sub-frequency domain range at a first moment and the second beam sent within the second sub-frequency domain range have different directions, the first beam belongs to the first beam set, and the second beam belongs to the second beam set.

[0010] Based on the above technical solution, the first PPDU sent by the first site carries a first field for beam training (such as a training field (TRN field)), and the frequency domain range corresponding to the first field includes a first sub-frequency domain range and a second sub-frequency domain range. Specifically, there is a non-overlapping part between the first sub-frequency domain range and the second sub-frequency domain range, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the frequency domain range of the first site sending the first PPDU. The first site can send the first beam set within the first sub-frequency domain range of the first field, and send the second beam set within the second sub-frequency domain range of the first field. There is at least one moment in which the beam directions sent in different sub-frequency domain ranges are different, thereby realizing frequency-division transmission of beams for beam training in different sub-frequency domain ranges, realizing frequency-division beam training, and reducing the overhead of beam training.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: sending first indication information, wherein the first indication information is used to indicate one or more of the following information: the number of sub-frequency domain ranges corresponding to the first field, the size of the first sub-frequency domain range, or the size of the second sub-frequency domain range.

[0012] Based on the above technical solution, the first station can indicate, through the first indication information, the number of frequency domain ranges corresponding to the first field carried in the first PPDU, and can indicate the size of the first sub-frequency domain range and the size of the second sub-frequency domain range corresponding to the first field. This allows a receiving end receiving the first PPDU to clearly know, based on the first indication information, that when a beam for beam training is transmitted using the first field carried in the first PPDU, it can be transmitted in a frequency division manner.

[0013] In a second aspect, a communication method is provided. The method may be executed by a first site, or may be executed by a component of the first site (eg, a chip or circuit), without limitation.

[0014] The communication method includes: sending a first physical layer protocol data unit PPDU and first indication information, wherein the first PPDU includes a first field for beam training, the frequency domain range corresponding to the first field includes a first sub-frequency domain range and a second sub-frequency domain range, and the first indication information is used to indicate the size of the first sub-frequency domain range and the size of the second sub-frequency domain range, wherein there is a non-overlapping part between the first sub-frequency domain range and the second sub-frequency domain range, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the first frequency domain range corresponding to the first PPDU.

[0015] Based on the above technical solution, the first PPDU sent by the first site carries a first field (such as a training field) for beam training, and the frequency domain range corresponding to the first field includes a first sub-frequency domain range and a second sub-frequency domain range. Specifically, there is a non-overlapping part between the first sub-frequency domain range and the second sub-frequency domain range, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the frequency domain range of the first site sending the first PPDU. The first site can indicate the size of the first sub-frequency domain range and the size of the second sub-frequency domain range corresponding to the first field carried in the first PPDU through the first indication information. Thereby, the receiving end receiving the first PPDU can clearly know based on the first indication information that when the beam for beam training is sent on the first field carried in the first PPDU, it can be sent in a frequency division manner.

[0016] In combination with the second aspect, in certain implementations of the second aspect, the method further includes: sending a first beam set within the first sub-frequency domain of the first field, and sending a second beam set within the second sub-frequency domain of the first field, wherein the first beam sent within the first sub-frequency domain at the first moment and the second beam sent within the second sub-frequency domain have different directions, the first beam belongs to the first beam set, and the second beam belongs to the second beam set.

[0017] Based on the above technical solution, the first site can send a first beam set within the first sub-frequency domain of the first field, and send a second beam set within the second sub-frequency domain of the first field. There is at least one moment when the directions of the beams sent in different sub-frequency domains are different, thereby realizing frequency division transmission of beams used for beam training in different sub-frequency domains, realizing frequency division beam training, and reducing the overhead of beam training.

[0018] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the method further includes: sending a third indication information, wherein the third indication information is used to instruct the first device to send a second field for beam training, the frequency domain range corresponding to the second field includes a third sub-frequency domain range and a fourth sub-frequency domain range, and the beam sent in the third sub-frequency domain range at the second moment is different from the beam sent in the fourth sub-frequency domain range.

[0019] Based on the above technical solution, the first site can instruct the first device through the third indication information to send the beam for beam training in different sub-frequency ranges on the second field through frequency division, thereby realizing frequency division beam training and reducing the overhead of beam training.

[0020] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the method further includes: sending fourth indication information, wherein the fourth indication information is used to instruct the first device to send a third field for beam training, and to instruct the second device to send a fourth field for beam training, the frequency domain range corresponding to the third field includes a fifth sub-frequency domain range, the frequency domain range corresponding to the fourth field includes a sixth sub-frequency domain range, and the beam sent in the fifth sub-frequency domain range at the third moment is different from the beam sent in the sixth sub-frequency domain range.

[0021] Based on the above technical solution, the first site can instruct multiple devices to send beams for beam training in different sub-frequency ranges through the fourth indication information, thereby realizing frequency-division beam training and reducing the overhead of beam training.

[0022] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the sending of the fourth indication information includes: sending the fourth indication information within the sub-frequency domain corresponding to the fourth beam, and the first device and the second device are within the preset range of the beam direction corresponding to the fourth beam; or, sending the fourth indication information within the sub-frequency domain corresponding to the fourth beam and the sub-frequency domain corresponding to the fifth beam, respectively, the first device is within the preset range of the beam direction corresponding to the fourth beam, the second device is within the preset range of the beam direction corresponding to the fifth beam, and the directions of the fourth beam and the fifth beam are different; or, sending the fourth indication information on a frequency domain range outside the first frequency domain range.

[0023] Based on the above technical solution, the first site may send the above fourth indication information in different ways to improve the flexibility of the solution.

[0024] In a third aspect, a communication method is provided. The method may be executed by the first site, or may be executed by a component of the first site (eg, a chip or circuit), without limitation.

[0025] The communication method includes: sending a third indication information, wherein the third indication information is used to instruct the first device to send a second field for beam training, the frequency domain range corresponding to the second field includes a third sub-frequency domain range and a fourth sub-frequency domain range, and the beam sent in the third sub-frequency domain range at the second moment is different from the beam sent in the fourth sub-frequency domain range.

[0026] Based on the above technical solution, the first site can instruct the first device through the third indication information to send the second field for beam training within different sub-frequency ranges, and there is at least one moment when the beam direction sent in different sub-frequency domains is different, so that the first device can realize frequency division transmission of beams for beam training within different sub-frequency domains, realize frequency division beam training, and reduce the overhead of beam training.

[0027] In combination with the third aspect, in certain implementations of the third aspect, the method further includes: sending fourth indication information, wherein the fourth indication information is used to instruct the first device to send a third field for beam training, and to instruct the second device to send a fourth field for beam training, the frequency domain range corresponding to the third field includes a fifth sub-frequency domain range, the frequency domain range corresponding to the fourth field includes a sixth sub-frequency domain range, and the beam sent in the fifth sub-frequency domain range at the third moment is different from the beam sent in the sixth sub-frequency domain range.

[0028] Based on the above technical solution, the first site can also instruct the first device and the second device to respectively send fields for beam training in different sub-frequency ranges through the fourth indication information, so that the first device and the second device can realize frequency division transmission of beams for beam training in different sub-frequency domains, realize frequency division beam training between devices, and reduce the overhead of beam training.

[0029] In a fourth aspect, a communication method is provided. The method can be executed by the first site, or can be executed by a component of the first site (such as a chip or circuit), without limitation.

[0030] The communication method includes: sending fourth indication information, wherein the fourth indication information is used to instruct the first device to send a third field for beam training, and to instruct the second device to send a fourth field for beam training, the frequency domain range corresponding to the third field includes a fifth sub-frequency domain range, the frequency domain range corresponding to the fourth field includes a sixth sub-frequency domain range, and the beam sent in the fifth sub-frequency domain range at the third moment is different from the beam sent in the sixth sub-frequency domain range.

[0031] Based on the above technical solution, the first site can instruct the first device and the second device to respectively send fields for beam training in different sub-frequency ranges through the fourth indication information, so that the first device and the second device can realize frequency division transmission of beams for beam training in different sub-frequency domains, realize frequency division beam training between devices, and reduce the overhead of beam training.

[0032] In combination with the fourth aspect, in certain implementations of the fourth aspect, the method further includes: sending a third indication information, wherein the third indication information is used to instruct the first device to send a second field for beam training, the frequency domain range corresponding to the second field includes a third sub-frequency domain range and a fourth sub-frequency domain range, and the beam sent in the third sub-frequency domain range at the second moment is different from the beam sent in the fourth sub-frequency domain range.

[0033] Based on the above technical solution, the first site can instruct the first device through the third indication information to send the second field for beam training within different sub-frequency ranges, and there is at least one moment when the beam direction sent in different sub-frequency domains is different, so that the first device can realize frequency division transmission of beams for beam training within different sub-frequency domains, realize frequency division beam training, and reduce the overhead of beam training.

[0034] In combination with the third aspect or the fourth aspect, in certain implementations of the third aspect or the fourth aspect, the method further includes: sending a first physical layer protocol data unit PPDU, the first PPDU including a first field for beam training, the frequency domain range corresponding to the first field including a first sub-frequency domain range and a second sub-frequency domain range, the first sub-frequency domain range and the second sub-frequency domain range have non-overlapping parts, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the first frequency domain range corresponding to the first PPDU; sending a first beam set within the first sub-frequency domain range of the first field, and sending a second beam set within the second sub-frequency domain range of the first field, wherein the first beam sent within the first sub-frequency domain range at the first moment and the second beam sent within the second sub-frequency domain range have different directions, the first beam belongs to the first beam set, and the second beam belongs to the second beam set.

[0035] Based on the above technical solution, the first site can not only trigger other devices to perform frequency-division beam training through the third indication information or the fourth indication information, but the first site itself can also send the first beam set within the first sub-frequency domain of the first field, and send the second beam set within the second sub-frequency domain of the first field. There is at least one moment when the directions of the beams sent in different sub-frequency domains are different, thereby realizing frequency-division transmission of beams used for beam training in different sub-frequency domains, realizing frequency-division beam training, and reducing the overhead of beam training.

[0036] In combination with the third aspect or the fourth aspect, in certain implementations of the third aspect or the fourth aspect, first indication information is sent, and the first indication information is used to indicate one or more of the following information: the number of sub-frequency domain ranges corresponding to the first field, the size of the first sub-frequency domain range, or the size of the second sub-frequency domain range.

[0037] Based on the above technical solution, the first station can indicate, through the first indication information, the number of frequency domain ranges corresponding to the first field carried in the first PPDU, and can indicate the size of the first sub-frequency domain range and the size of the second sub-frequency domain range corresponding to the first field. This allows a receiving end receiving the first PPDU to clearly know, based on the first indication information, that when a beam for beam training is transmitted using the first field carried in the first PPDU, it can be transmitted in a frequency division manner.

[0038] In combination with the first to fourth aspects, in certain implementations of the first to fourth aspects, the sequence corresponding to the first beam set sent on the subcarriers of the first sub-frequency domain range is a first sequence, and the first sequence is a partial sequence of the sequence corresponding to the first frequency domain range sent on at least one first subcarrier; the sequence corresponding to the second beam set sent on the subcarriers of the second sub-frequency domain range is a second sequence, and the second sequence is a partial sequence of the sequence corresponding to the first frequency domain range sent on at least one second subcarrier.

[0039] Based on the above technical solution, the sequence corresponding to the beam set sent on the subcarriers of the sub-frequency domain range corresponding to the first field can be determined by the sequence corresponding to the first frequency domain range sent on different subcarriers, so that the sequence corresponding to the beam set sent on the subcarriers of different sub-frequency domain ranges can be determined based on the known sequence, thereby reducing the complexity of generating the sequence corresponding to the beam set.

[0040] In combination with the first to fourth aspects, in certain implementations of the first to fourth aspects, the sequence corresponding to the first beam set sent on the subcarriers of the first sub-frequency domain range is a first sequence, and the first sequence is a sequence corresponding to the first sub-frequency domain range; the sequence corresponding to the second beam set sent on the subcarriers of the second sub-frequency domain range is a second sequence, and the second sequence is a sequence corresponding to the second sub-frequency domain range.

[0041] Based on the above technical solution, the sequence corresponding to the beam set sent on the subcarrier of the sub-frequency domain range corresponding to the first field can be determined by the sequences corresponding to different sub-frequency domain ranges, and the existing sequences can be reused to reduce the complexity of generating the sequence corresponding to the beam set.

[0042] In combination with the first to fourth aspects, in certain implementations of the first to fourth aspects, the sequence corresponding to the first frequency domain range includes a short training field STF sequence or a long training field LTF sequence for the first bandwidth.

[0043] In combination with the first to fourth aspects, in certain implementations of the first to fourth aspects, the sequence corresponding to the first sub-frequency range includes a short training field STF sequence or a long training field LTF sequence for the first sub-frequency range.

[0044] In combination with the first to fourth aspects, in certain implementations of the first to fourth aspects, the sequence corresponding to the second sub-frequency range includes a short training field STF sequence or a long training field LTF sequence for the second sub-frequency range.

[0045] In combination with the first aspect to the fourth aspect, in certain implementations of the first aspect to the fourth aspect, the first indication information is further used to indicate that the frequency domain range corresponding to the first field includes multiple sub-frequency domain ranges.

[0046] In combination with the first to fourth aspects, in certain implementations of the first to fourth aspects, sending a first beam set in the first sub-frequency domain range, and sending a second beam set in the second sub-frequency domain range, include: sending multiple beams in the first beam set in multiple first time domain ranges within the first sub-frequency domain range, respectively, and the directions of the multiple beams in the first beam set are different; and / or, sending multiple beams in the second beam set in multiple second time domain ranges within the second sub-frequency domain range, respectively, and the directions of the multiple beams in the second beam set are different.

[0047] Based on the above technical solution, the first station can transmit multiple beams in the first beam set in multiple first time domain ranges within the first sub-frequency domain, and transmit multiple beams in the second beam set in multiple second time domain ranges within the second sub-frequency domain. This enables time-division transmission of different beams in different sub-frequency domains, further reducing beam training overhead.

[0048] In combination with the first to fourth aspects, in certain implementations of the first to fourth aspects, the method further includes: sending second indication information, wherein the second indication information is used to indicate at least one of the following information: the number of the first time domain ranges corresponding to the first sub-frequency domain range, the configuration information of the first time domain range, the length of the training field in the first time domain range, the number of training field symbols in the first time domain range, the number of the second time domain ranges corresponding to the second sub-frequency domain range, the configuration information of the second time domain range, the length of the training field in the second time domain range, and the number of training field symbols in the second time domain range.

[0049] Based on the above technical solution, when the first site can send beams for beam training in different sub-frequency domains in time division, the first site can indicate the parameters of time division sending through the second indication information, so that the receiving end receiving the first PPDU can clearly know based on the second indication information that the beams for beam training can be sent in different sub-frequency domains on the first field in a time division manner.

[0050] In combination with the first to fourth aspects, in certain implementations of the first to fourth aspects, the method further includes: receiving a response message, the response message including an identifier of the third beam and / or location information of the third beam, wherein the location information of the third beam is used to indicate a frequency domain range and a time domain range corresponding to the third beam.

[0051] Based on the above technical solution, the first site can receive a response message, which includes the identifier of the third beam and / or the location information of the third beam, wherein the location information is used to indirectly indicate the third beam, so that the first site can determine the third beam based on the identifier of the third beam and / or the location information of the third beam, and subsequent communication processes can be based on the third beam.

[0052] In combination with the first to fourth aspects, in certain implementations of the first to fourth aspects, the position information of the third beam includes: an identifier of the frequency domain range corresponding to the third beam and an identifier of the time domain range corresponding to the third beam; or, a position identifier corresponding to the third beam, wherein the position identifier is an identifier corresponding to the third beam among a plurality of position identifiers sequentially identified from front to back in the time domain and from low frequency to high frequency in the frequency domain of the first field.

[0053] Based on the above technical solution, the position information of the third beam can be two-dimensional identification information including the identification of the frequency domain range and the identification of the time domain range, or it can also be one-dimensional identification information jointly determined by the frequency domain range position and the time domain range position, that is, the position information of the beam can be in different identification forms to improve the flexibility of the solution.

[0054] In a fifth aspect, a communication method is provided. The method can be executed by the second site, or can be executed by a component of the second site (such as a chip or circuit), without limitation.

[0055] The communication method includes: receiving a first physical layer protocol data unit PPDU, the first PPDU including a first field for beam training, the frequency domain range corresponding to the first field including a first sub-frequency domain range and a second sub-frequency domain range, the first sub-frequency domain range and the second sub-frequency domain range have non-overlapping parts, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the first frequency domain range corresponding to the first PPDU; receiving a first beam set within the first sub-frequency domain range of the first field, and receiving a second beam set within the second sub-frequency domain range of the first field, wherein the first beam received within the first sub-frequency domain range at a first moment and the second beam received within the second sub-frequency domain range have different directions, the first beam belongs to the first beam set, and the second beam belongs to the second beam set.

[0056] In combination with the fifth aspect, in certain implementations of the fifth aspect, the method further includes: receiving first indication information, wherein the first indication information is used to indicate one or more of the following information: the number of sub-frequency domain ranges corresponding to the first field, the size of the first sub-frequency domain range, or the size of the second sub-frequency domain range.

[0057] In a sixth aspect, a communication method is provided. The method can be executed by the second site, or can also be executed by a component of the second site (such as a chip or circuit), without limitation.

[0058] The communication method includes: receiving a first physical layer protocol data unit PPDU and first indication information, wherein the first PPDU includes a first field for beam training, the frequency domain range corresponding to the first field includes a first sub-frequency domain range and a second sub-frequency domain range, and the first indication information is used to indicate the size of the first sub-frequency domain range and the size of the second sub-frequency domain range, wherein there is a non-overlapping part between the first sub-frequency domain range and the second sub-frequency domain range, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the first frequency domain range corresponding to the first PPDU.

[0059] In combination with the sixth aspect, in certain implementations of the sixth aspect, the method further includes: receiving a first beam set within the first sub-frequency domain of the first field, and receiving a second beam set within the second sub-frequency domain of the first field, wherein the first beam sent within the first sub-frequency domain at the first moment and the second beam sent within the second sub-frequency domain have different directions, the first beam belongs to the first beam set, and the second beam belongs to the second beam set.

[0060] In a seventh aspect, a communication method is provided. The method can be executed by the second site, or can also be executed by a component of the second site (such as a chip or circuit), without limitation.

[0061] The communication method includes: receiving third indication information, wherein the third indication information is used to instruct the first device to send a second field for beam training, the frequency domain range corresponding to the second field includes a third sub-frequency domain range and a fourth sub-frequency domain range, and the beam sent in the third sub-frequency domain range at the second moment is different from the beam sent in the fourth sub-frequency domain range.

[0062] In combination with the seventh aspect, in certain implementations of the seventh aspect, the method further includes: sending a first physical layer protocol data unit PPDU, the first PPDU including a first field for beam training, the frequency domain range corresponding to the first field including a first sub-frequency domain range and a second sub-frequency domain range, the first sub-frequency domain range and the second sub-frequency domain range have non-overlapping parts, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the first frequency domain range corresponding to the first PPDU; sending a first beam set within the first sub-frequency domain range of the first field, and sending a second beam set within the second sub-frequency domain range of the first field, wherein the first beam sent within the first sub-frequency domain range at the first moment and the second beam sent within the second sub-frequency domain range have different directions, the first beam belongs to the first beam set, and the second beam belongs to the second beam set.

[0063] In combination with the seventh aspect, in certain implementations of the seventh aspect, first indication information is sent, and the first indication information is used to indicate one or more of the following information: the number of sub-frequency domain ranges corresponding to the first field, the size of the first sub-frequency domain range, or the size of the second sub-frequency domain range.

[0064] In combination with the fifth to seventh aspects, in certain implementations of the fifth to seventh aspects, the sequence corresponding to the first beam set sent on the subcarriers of the first sub-frequency domain range is a first sequence, and the first sequence is a partial sequence of the sequence corresponding to the first frequency domain range sent on at least one first subcarrier; the sequence corresponding to the second beam set sent on the subcarriers of the second sub-frequency domain range is a second sequence, and the second sequence is a partial sequence of the sequence corresponding to the first frequency domain range sent on at least one second subcarrier.

[0065] In combination with the fifth to seventh aspects, in certain implementations of the fifth to seventh aspects, the sequence corresponding to the first beam set sent on the subcarriers of the first sub-frequency domain range is a first sequence, and the first sequence is the sequence corresponding to the first sub-frequency domain range; the sequence corresponding to the second beam set sent on the subcarriers of the second sub-frequency domain range is a second sequence, and the second sequence is the sequence corresponding to the second sub-frequency domain range.

[0066] In combination with the fifth to seventh aspects, in certain implementations of the fifth to seventh aspects, the sequence corresponding to the first frequency domain range includes a short training field STF sequence or a long training field LTF sequence for the first bandwidth.

[0067] In combination with the fifth to seventh aspects, in certain implementations of the fifth to seventh aspects, the sequence corresponding to the first sub-frequency range includes a short training field STF sequence or a long training field LTF sequence for the first sub-frequency range.

[0068] In combination with the fifth to seventh aspects, in certain implementations of the fifth to seventh aspects, the sequence corresponding to the second sub-frequency range includes a short training field STF sequence or a long training field LTF sequence for the second sub-frequency range.

[0069] In combination with the fifth aspect to the seventh aspect, in certain implementations of the fifth aspect to the seventh aspect, the first indication information is further used to indicate that there are multiple sub-frequency domain ranges in the frequency domain range corresponding to the first field.

[0070] In combination with the fifth to seventh aspects, in certain implementations of the fifth to seventh aspects, receiving a first beam set in the first sub-frequency domain range, and receiving a second beam set in the second sub-frequency domain range, include: receiving multiple beams in the first beam set in multiple first time domain ranges within the first sub-frequency domain range, respectively, and the directions of the multiple beams in the first beam set are different; and / or receiving multiple beams in the second beam set in multiple second time domain ranges within the second sub-frequency domain range, respectively, and the directions of the multiple beams in the second beam set are different.

[0071] In combination with the fifth to seventh aspects, in certain implementations of the fifth to seventh aspects, the method further includes: receiving second indication information, the second indication information being used to indicate at least one of the following information: the number of the first time domain ranges corresponding to the first sub-frequency domain range, the configuration information of the first time domain range, the length of the training field in the first time domain range, the number of training field symbols in the first time domain range, the number of the second time domain ranges corresponding to the second sub-frequency domain range, the configuration information of the second time domain range, the length of the training field in the second time domain range, and the number of training field symbols in the second time domain range.

[0072] In combination with the fifth to seventh aspects, in certain implementations of the fifth to seventh aspects, the method further includes: sending a response message, the response message including an identifier of the third beam and / or location information of the third beam, wherein the location information of the third beam is used to indicate the frequency domain range and time domain range corresponding to the third beam.

[0073] In combination with the fifth to seventh aspects, in certain implementations of the fifth to seventh aspects, the position information of the third beam includes: an identifier of the frequency domain range corresponding to the third beam and an identifier of the time domain range corresponding to the third beam; or, a position identifier corresponding to the third beam, wherein the position identifier is an identifier corresponding to the third beam among multiple position identifiers sequentially identified from front to back in the time domain and from low frequency to high frequency in the frequency domain of the first field.

[0074] In combination with the fifth to seventh aspects, in certain implementations of the fifth to seventh aspects, the method further includes: receiving third indication information, wherein the third indication information is used to instruct the first device to send a second field for beam training, the frequency domain range corresponding to the second field includes a third sub-frequency domain range and a fourth sub-frequency domain range, and the beam sent in the third sub-frequency domain range at the second moment is different from the beam sent in the fourth sub-frequency domain range.

[0075] The technical effects of the methods shown in the above fifth to seventh aspects and their possible designs can refer to the technical effects in the first to fourth aspects and their possible designs.

[0076] In an eighth aspect, a communication device is provided, which is used to perform the methods provided in aspects 1 to 4 above. Specifically, the communication device may include units and / or modules, such as a processing unit and an acquisition unit, for performing the methods provided in any one of the above implementations of aspects 1 to 4.

[0077] In one implementation, the transceiver unit may be a transceiver or an input / output interface; the processing unit may be at least one processor. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input / output interface may be an input / output circuit.

[0078] In another implementation, the transceiver unit may be an input / output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip, chip system or circuit; the processing unit may be at least one processor, processing circuit or logic circuit.

[0079] Exemplarily, the communication device is the above-mentioned first site or a component of the first site (such as a chip or circuit), and the communication device includes:

[0080] A transceiver unit is configured to send a first physical layer protocol data unit (PPDU), wherein the first PPDU includes a first field for beam training, the frequency domain range corresponding to the first field includes a first sub-frequency domain range and a second sub-frequency domain range, the first sub-frequency domain range and the second sub-frequency domain range have non-overlapping parts, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the first frequency domain range corresponding to the first PPDU. The transceiver unit is further configured to send a first beam set within the first sub-frequency domain range of the first field, and to send a second beam set within the second sub-frequency domain range of the first field, wherein the first beam sent within the first sub-frequency domain range at a first moment and the second beam sent within the second sub-frequency domain range have different directions, the first beam belongs to the first beam set, and the second beam belongs to the second beam set.

[0081] Optionally, the transceiver unit is also used to send first indication information, where the first indication information is used to indicate one or more of the following information: the number of sub-frequency domain ranges corresponding to the first field, the size of the first sub-frequency domain range, or the size of the second sub-frequency domain range.

[0082] Optionally, the transceiver unit is also used to send a third indication information, wherein the third indication information is used to instruct the first device to send a second field for beam training, the frequency domain range corresponding to the second field includes a third sub-frequency domain range and a fourth sub-frequency domain range, and the beam sent in the third sub-frequency domain range at the second moment is different from the beam sent in the fourth sub-frequency domain range.

[0083] Optionally, the transceiver unit is also used to send a fourth indication information, wherein the fourth indication information is used to instruct the first device to send a third field for beam training, and to instruct the second device to send a fourth field for beam training, the frequency domain range corresponding to the third field includes a fifth sub-frequency domain range, and the frequency domain range corresponding to the fourth field includes a sixth sub-frequency domain range. The beam sent in the fifth sub-frequency domain range at the third moment is different from the beam sent in the sixth sub-frequency domain range.

[0084] Optionally, the transceiver unit is also used to send second indication information, where the second indication information is used to indicate at least one of the following information: the number of the first time domain ranges corresponding to the first sub-frequency domain range, the configuration information of the first time domain range, the length of the training field in the first time domain range, the number of training field symbols in the first time domain range, the number of the second time domain ranges corresponding to the second sub-frequency domain range, the configuration information of the second time domain range, the length of the training field in the second time domain range, and the number of training field symbols in the second time domain range.

[0085] Optionally, the transceiver unit is also used to receive a response message, wherein the response message includes an identifier of the third beam and / or location information of the third beam, wherein the location information of the third beam is used to indicate a frequency domain range and a time domain range corresponding to the third beam.

[0086] Exemplarily, the communication device is the above-mentioned second site or a component of the second site (such as a chip or circuit), and the communication device includes:

[0087] A transceiver unit is configured to receive a first physical layer protocol data unit (PPDU), wherein the first PPDU includes a first field for beam training, the frequency domain range corresponding to the first field includes a first sub-frequency domain range and a second sub-frequency domain range, the first sub-frequency domain range and the second sub-frequency domain range have non-overlapping portions, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the first frequency domain range corresponding to the first PPDU. The transceiver unit is further configured to receive a first beam set within the first sub-frequency domain range of the first field, and to receive a second beam set within the second sub-frequency domain range of the first field, wherein the first beam received within the first sub-frequency domain range at a first moment and the second beam received within the second sub-frequency domain range have different directions, the first beam belongs to the first beam set, and the second beam belongs to the second beam set.

[0088] Optionally, the transceiver unit is further used to receive first indication information, where the first indication information is used to indicate one or more of the following information: the number of sub-frequency domain ranges corresponding to the first field, the size of the first sub-frequency domain range, or the size of the second sub-frequency domain range.

[0089] Optionally, the transceiver unit is also used to receive a third indication information, wherein the third indication information is used to instruct the first device to send a second field for beam training, the frequency domain range corresponding to the second field includes a third sub-frequency domain range and a fourth sub-frequency domain range, and the beam sent in the third sub-frequency domain range at the second moment is different from the beam sent in the fourth sub-frequency domain range.

[0090] Optionally, the transceiver unit is also used to receive fourth indication information, wherein the fourth indication information is used to instruct the first device to send a third field for beam training, and to instruct the second device to send a fourth field for beam training, the frequency domain range corresponding to the third field includes a fifth sub-frequency domain range, and the frequency domain range corresponding to the fourth field includes a sixth sub-frequency domain range. The beam sent in the fifth sub-frequency domain range at the third moment is different from the beam sent in the sixth sub-frequency domain range.

[0091] Optionally, the transceiver unit is also used to receive second indication information, where the second indication information is used to indicate at least one of the following information: the number of the first time domain ranges corresponding to the first sub-frequency domain range, the configuration information of the first time domain range, the length of the training field in the first time domain range, the number of training field symbols in the first time domain range, the number of the second time domain ranges corresponding to the second sub-frequency domain range, the configuration information of the second time domain range, the length of the training field in the second time domain range, and the number of training field symbols in the second time domain range.

[0092] Optionally, the transceiver unit is also used to send a response message, wherein the response message includes an identifier of the third beam and / or location information of the third beam, wherein the location information of the third beam is used to indicate a frequency domain range and a time domain range corresponding to the third beam.

[0093] In a ninth aspect, the present application provides a processor for executing the methods provided in the above aspects.

[0094] For the operations such as sending and acquiring / receiving involved in the processor, unless otherwise specified, or if they do not conflict with their actual functions or internal logic in the relevant descriptions, they can be understood as processor output, reception, input and other operations, and can also be understood as sending and receiving operations performed by the radio frequency circuit and antenna. This application does not limit this.

[0095] In a tenth aspect, a computer-readable storage medium is provided, which stores a program code for execution by a device, and the program code includes a method provided by any one of the implementation methods of the first to fourth aspects above.

[0096] In the eleventh aspect, a computer program product comprising instructions is provided, which, when run on a computer, enables the computer to execute the method provided in any one of the implementations of the first to fourth aspects above.

[0097] In the twelfth aspect, a chip is provided, which includes a processor and a communication interface. The processor reads instructions stored in the memory through the communication interface and executes the method provided by any one of the implementation methods of the first to fourth aspects above.

[0098] Optionally, as an implementation method, the chip also includes a memory, in which a computer program or instruction is stored, and the processor is used to execute the computer program or instruction stored in the memory. When the computer program or instruction is executed, the processor is used to execute the method provided in any one of the implementation methods of the first to seventh aspects above.

[0099] In the thirteenth aspect, a communication system is provided, comprising the communication device described in the eighth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0100] FIG1 is a schematic diagram of an application scenario to which an embodiment of the present application is applicable.

[0101] FIG2 shows a schematic diagram of the structure of a device provided in this application.

[0102] FIG3 is a schematic diagram of a PPDU format.

[0103] FIG4 shows a schematic structural diagram of a beacon interval BI.

[0104] FIG5 is a schematic diagram of time-division beamforming training.

[0105] FIG6 is a schematic flow chart of a communication method provided in an embodiment of the present application.

[0106] FIG7 is a schematic diagram of a first PPDU provided in an embodiment of the present application.

[0107] Figure 8 (a) and (b) are schematic diagrams of another first PPDU provided in an embodiment of the present application.

[0108] (a) and (b) in FIG9 are schematic diagrams of a method for dividing the sub-frequency domain range provided in an embodiment of the present application.

[0109] (a) and (b) in Figure 10 are schematic diagrams of the sequences provided in the Examples of the present application.

[0110] (a) and (b) in FIG11 are schematic diagrams of beam position information provided in an embodiment of the present application.

[0111] FIG12 is a schematic flow chart of a communication method provided in an embodiment of the present application.

[0112] (a) to (d) in FIG13 are schematic diagrams of trigger information provided in an embodiment of the present application.

[0113] FIG14 is a schematic block diagram of a communication device provided in an embodiment of the present application.

[0114] FIG15 is a schematic diagram of another communication device provided in an embodiment of the present application.

[0115] FIG16 is a schematic diagram of a chip system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0116] In order to facilitate understanding of the embodiments of the present application, the following points are first explained.

[0117] First, in this application, "used to indicate" can include being used for direct indication and being used for indirect indication. When describing that a certain indication information is used to indicate A, it can include that the indication information directly indicates A or indirectly indicates A, but it does not mean that the indication information must carry A.

[0118] The information indicated by the indication information is called the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, directly indicating the information to be indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein there is an association between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, it is also possible to use the arrangement order of each piece of information agreed in advance (such as specified in the protocol) to achieve the indication of specific information, thereby reducing the indication overhead to a certain extent. At the same time, it is also possible to identify the common parts of each piece of information and indicate them uniformly to reduce the indication overhead caused by indicating the same information separately.

[0119] Second, "at least one" shown in the present application refers to one or more, and "multiple" refers to two or more. In addition, in the embodiments of the present application, "first", "second" and various digital numbers (for example, "#1", "#2", etc.) are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the sequence number of each process below does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. It should be understood that the objects described in this way can be interchangeable under appropriate circumstances so as to be able to describe solutions other than the embodiments of the present application. In addition, in the embodiments of the present application, words such as "S610" are only for the convenience of description and are not used to limit the order of execution of steps.

[0120] Third, in the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0121] Fourth, the term "storage" used in the embodiments of this application may refer to storage in one or more memories. The one or more memories may be provided separately or integrated into an encoder or decoder, a processor, or a communication device. The one or more memories may also be partially provided separately and partially integrated into a decoder, a processor, or a communication device. The type of memory may be any form of storage medium, and this application is not limited thereto.

[0122] Fifth, in the implementation of this application, "protocol" may refer to a standard protocol in the field of communications, for example, it may include the NR protocol and related protocols used in future communication systems, and this application does not limit this.

[0123] Sixth, in the embodiments of the present application, the terms “of”, “corresponding, relevant”, “corresponding” and “associate” can sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings they intend to express are consistent.

[0124] Seventh, in the embodiments of the present application, "under the circumstances", "when", and "if" can sometimes be used interchangeably. It should be pointed out that when the distinction between them is not emphasized, the meanings they intend to express are consistent.

[0125] Eighth, the term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0126] The technical solution in this application will be described below with reference to the accompanying drawings.

[0127] The technical solution provided in the embodiments of the present application can be applied to wireless local area network (WLAN) scenarios, for example, supporting Institute of Electrical and Electronics Engineers (IEEE) 802.11 related standards, such as 802.11a / b / g standards, 802.11n standards, 802.11ac standards, 802.11ax standards, IEEE 802.11ax next-generation Wi-Fi protocols, such as 802.11be, Wi-Fi 7, extremely high throughput (EHT), 802.11ad, 802.11ay or 802.11bf, and 802.11be next generation, Wi-Fi 8, etc., and can also be applied to ultra-wideband (UWB)-based Wireless personal area network systems based on ultra-wideband (UWB) wireless technologies, such as the 802.15 series of standards, can also be applied to sensing systems, such as the 802.11bf series of standards, and can also be applied to the 802.11bn standard or the ultra-high reliability (UHR) standard. The 802.11n standard is known as the high throughput (HT) standard, the 802.11ac standard is known as the very high throughput (VHT) standard, the 802.11ax standard is known as the high efficiency (HE) standard, and the 802.11be standard is known as the extremely high throughput (EHT) standard. 802.11bf includes two major categories of standards: low-frequency (e.g., sub7 GHz) and high-frequency (e.g., 60 GHz). Sub-7GHz implementations primarily rely on standards such as 802.11ac, 802.11ax, 802.11be, and their next-generation counterparts, while 60GHz implementations primarily rely on standards such as 802.11ad, 802.11ay, and their next-generation counterparts. 802.11ad is also known as the directional multi-gigabit (DMG) standard, and 802.11ay is also known as the enhanced directional multi-gigabit (EDMG) standard.

[0128] Although the embodiments of the present application are primarily described using the deployment of a WLAN network, particularly a network using the IEEE 802.11 system standard, as an example, those skilled in the art will readily appreciate that the various aspects of the embodiments of the present application can be extended to other networks using various standards or protocols, such as a high-performance wireless local area network (HIPERLAN), a wireless wide area network (WWAN), a wireless personal area network (WPAN), or other networks now known or developed in the future. Therefore, regardless of the coverage area and wireless access protocol used, the various aspects provided in the embodiments of the present application can be applied to any suitable wireless network.

[0129] The technical solutions of the embodiments of the present application can also be applied to various communication systems, such as: WLAN communication system, wireless fidelity (Wi-Fi) system, long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), world-wide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) system or new radio (NR), sixth generation (6G) system, Internet of Things (IoT) network or vehicle to x (V2X), etc.

[0130] The above-mentioned communication system applicable to the present application is only an example, and the communication system applicable to the present application is not limited to this. It is described uniformly here and will not be repeated below.

[0131] FIG1 is a schematic diagram of an application scenario applicable to an embodiment of the present application. As shown in FIG1 , the communication method provided by the present application is applicable to data communication between an access point (AP) and a station (STA), wherein the station may be a non-AP station (none access point station, non-AP STA), referred to as a non-AP station or STA for short. Specifically, the scheme of the present application is applicable to data communication between an AP and one or more non-AP stations (for example, data communication between AP1 and non-AP STA1, non-AP STA2), and is also applicable to data communication between APs (for example, data communication between AP1 and AP2), as well as data communication between non-AP STAs and non-AP STAs (for example, data communication between non-AP STA2 and non-AP STA3).

[0132] An access point is a node that allows terminals (such as mobile phones) to access a wired (or wireless) network. It is primarily deployed in homes, buildings, and campuses, with a typical coverage radius of tens to hundreds of meters. It can also be deployed outdoors. An access point acts as a bridge between wired and wireless networks, connecting wireless network clients and then connecting the wireless network to the Ethernet.

[0133] Specifically, the access point can be a terminal or network device with a Wi-Fi chip, and the network device can be a server, a router, a switch, a bridge, a computer, a mobile phone, a relay station, a vehicle-mounted device, a wearable device, a network device in a 5G network, a network device in a 6G network, or a network device in a public land mobile network (PLMN), etc., and the embodiments of the present application are not limited thereto. The access point can be a device that supports the Wi-Fi standard. For example, the access point can also support one or more standards of the IEEE 802.11 series, such as 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11ad, 802.11ay, 802.11bn, etc.

[0134] A non-AP site may be a wireless communication chip, a wireless sensor, or a wireless communication terminal, and may also be referred to as a user, user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. A non-AP site may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, an Internet of Things device, a wearable device, a terminal device in a 5G network, a terminal device in a 6G network, or a terminal device in a PLMN, and the embodiments of the present application are not limited thereto. A non-AP site may be a device that supports the WLAN standard. For example, a non-AP station may support one or more standards in the IEEE 802.11 series, such as 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11ad, and 802.11ay.

[0135] For example, non-AP sites can be mobile phones, tablets, set-top boxes, smart TVs, smart wearable devices, in-vehicle communication devices, computers, Internet of Things (IoT) nodes, sensors, smart homes such as smart cameras, smart remote controls, smart water and electricity meters, and sensors in smart cities.

[0136] The above-mentioned AP or non-AP site may include a transmitter, a receiver, a memory, a processor, etc., wherein the transmitter and the receiver are used for sending and receiving packet structures respectively, the memory is used to store signaling information and store preset values ​​agreed in advance, etc., and the processor is used to parse signaling information, process related data, etc.

[0137] For example, Figure 2 shows a communication device provided by the present application. The device shown in Figure 2 can be an AP or a non-AP site. Among them, a medium access control (MAC) layer processing module, a physical (PHY) layer processing module, a radio frequency / antenna, etc. are used to implement the relevant functions of the above-mentioned transmitter and receiver. As shown in Figure 2, in addition to the MAC layer processing module, the PHY layer processing module, the radio frequency / antenna, the memory, and the processor, the device can also include a controller and a scheduler.

[0138] It should be understood that FIG2 is merely an example of a device provided in the present application and does not constitute a limitation of the present application. For example, the device may not include a controller and / or a scheduler.

[0139] In order to facilitate understanding of the technical solutions of the embodiments of the present application, some terms or concepts that may be involved in the embodiments of the present application are first briefly described.

[0140] 1. Directional communication: WLAN has gone through several generations of development, including standards below 7 GHz: such as 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11bn, etc.; it also includes high-frequency standards (standards at 45 GHz and above): such as 802.11ad and 802.11ay standards operating near 60 GHz, and the integrated millimeter wave (Integrated mmWave) standard that may be formed in the future.

[0141] In high-frequency communications, due to characteristics such as large signal path loss, it is generally required that when two devices communicate, at least one device uses directional communication, that is, the communication mode of "directional + directional" or "directional + omnidirectional" is generally used between devices.

[0142] Due to the directional nature of millimeter-wave communications, beam calibration training in the transmit and / or receive directions is required. Traditional beam training methods typically use a time-division approach for both transmit and receive beam training. The following briefly describes the specific content of the PPDU based on orthogonal frequency division multiplexing (OFDM), currently being considered for integration into millimeter-wave standards.

[0143] 2. Low-frequency physical layer protocol data unit (PPDU): Currently, many low-frequency WLAN standards exist, such as 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, and 802.11be. Unlike existing high-frequency WLAN standards, which all use a single-carrier preamble as the beginning of the PPDU (the data portion can be in either single-carrier or OFDM mode), the evolving low-frequency WLAN PPDU format generally uses OFDM modulation from beginning to end. Figure 3 shows a schematic diagram of a low-frequency PPDU format based on OFDM. The PPDU includes any one or more of the following information: Legacy Short Training Field (L-STF), Legacy Long Training Field (L-LTF), Legacy Signal Field (L-SIG), Repeat Legacy-Signal Field (RL-SIG), Universal Signal Field (U-SIG), Extremely High Throughput Signaling Field or Extremely High Throughput Signaling Field (EHT-SIG), EHT-Short Training Field (EHT-STF), EHT-Long Training Field (EHT-LTF), Data Field, and Package Extension (PE). One or more of L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, EHT-SIG, EHT-STF, and EHT-LTF may be part of the physical layer header (or preamble) of the PPDU.

[0144] L-STF, L-LTF, and L-SIG can be understood as legacy preamble fields, used to ensure the coexistence of new devices with legacy devices. RL-SIG is used to enhance the reliability of legacy signaling fields.

[0145] U-SIG and EHT-SIG are signaling fields. U-SIG is used to carry common information, such as PPDU version, uplink / downlink information, PPDU frequency bandwidth, and puncturing information. EHT-SIG includes information indicating resource allocation and data demodulation.

[0146] It should be noted that Figure 3 illustrates the fields in the PPDU in the 802.11be scenario. This does not limit the scope of protection of this application. For example, the PPDU in the low-frequency standard may also include the VHT PPDU in the OFDM format of 802.11ac (VHT), and the UHR PPDU in 802.11bn (UHR).

[0147] From the above, it can be seen that the PPDU in the low-frequency standard includes traditional preamble codes (including L-SIG, L-LTF and L-SIG) and new-generation preamble codes (such as U-SIG, EHT-STF, EHT-LTF), data fields (Data), etc.

[0148] 3. PPDU with increased subcarrier spacing: also known as the upclocked version of the PPDU. The so-called upclocking shortens the interval between sent points. When the number of sent points remains unchanged, the period corresponding to the same number of points will be shortened. Since the period is inversely proportional to the subcarrier spacing, the subcarrier spacing will increase.

[0149] For example, a VHT PPDU can be transmitted on 20, 40, 80, and 160 MHz bands, with a subcarrier spacing of 312.5 kHz and a symbol period of 3.2 microseconds. Each 20 MHz band corresponds to 64 points, with a symbol period of 0.05 microseconds. The 802.11ac upclocked PPDU using 4x upclocking and 8x upclocking is shown in the first two columns of Table 1 below (increasing the subcarrier spacing shortens the transmission period for the same number of points).

[0150] 802.11be, as shown in the third column of Table 1 (16x overclocking), is similar to 802.11ac, except that the subcarrier spacing in the EHT-STF and subsequent fields, such as the data field, is changed to 78.125 kHz, corresponding to 256 points in every 20 MHz. (1.25 MHz in the third column = 78.125 kHz * 16).

[0151] Table 1:

[0152] Since increasing the subcarrier spacing can improve the effects of phase noise, carrier frequency offset, etc., the IMMW standard is considering using PPDUs with larger subcarrier spacing based on OFDM in high frequencies, and is also considering using PPDUs with an up-clocked version based on a low-frequency format.

[0153] 4. Sector-level sweep (SLS) phase: Specifically, the SLS phase includes the following four parts:

[0154] The initiator sector sweep (ISS) phase is used to train the initiator's directional transmission beam. The initiator sends training data in a directionally transmitted beam with a certain width, and the responder receives the training data quasi-omnidirectionally.

[0155] The responder sector sweep (RSS) phase is used to train the responder's directional transmit beam. The responder sends training data in a directionally defined beam width, including the initiator's optimal transmit sector information from the previous phase. The initiator then receives the training data quasi-omnidirectionally.

[0156] In the sector sweep feedback (SSW-Feedback) phase, the feedback information is a list of sectors sent by the initiator sorted by sector quality, and includes the best sector of the responder in the previous phase. At this time, the responder is in quasi-omnidirectional reception mode.

[0157] During the Sector Sweep Acknowledgment (SSW-ACK) phase, an SLS before a Data Transfer Interval (DTI) can be performed without the SSW-ACK phase. However, an SLS during a DTI requires an SSW-ACK phase. During the SSW-ACK phase, the responder sends back a list of sectors sorted by quality.

[0158] It should be understood that the device uses an omnidirectional antenna for omnidirectional transmission or omnidirectional reception. The omnidirectional antenna radiates uniformly in 360° in the horizontal direction, that is, it is non-directional. In the vertical direction, it shows a beam with a certain width. Generally speaking, the smaller the beam width, the greater the gain. Omnidirectional antennas have a large coverage range and are generally used in suburban and large-area stations in communication systems. Correspondingly, the device uses a directional antenna for directionally transmitting or directionally receiving. It radiates in a certain angle range in the horizontal direction, that is, it is directionally. Like omnidirectional antennas, the smaller the beam width, the greater the gain. Directional antennas are generally used in communication systems in environments with long communication distances, small coverage areas, high target density, and high frequency utilization.

[0159] 5. Time-division beam training: In 802.11ad / ay, the timeline is divided into beacon intervals (BIs). Figure 4 shows a schematic diagram of the structure of a beacon interval BI. As shown in Figure 4, the beacon interval is divided into a beacon header indication (BHI) and a data transmission interval (DTI). The BHI includes the beacon transmission interval (BTI), association beamforming training (A-BFT), and announcement transmission interval (ATI).

[0160] Specifically, the personal basic service set (PBSS) control point (PCP) or AP sends multiple beacon frames according to sector numbers within the BTI for downlink sector scanning. A-BFT is used for STA association and uplink sector scanning. The ATI is used by the PCP / AP to poll STAs for cached data information and allocate resources within the data transmission interval (DTI) to STAs. The entire DTI is divided into several sub-intervals, which are divided into contention-based access periods (CBAPs) and service periods (SPs) based on the access method. The latter is for scheduled transmission without the need for contention.

[0161] It should be noted that 802.11ad and 802.11ay allow PCPs to communicate with STAs, and the corresponding behavior of PCPs is similar to that of APs. Therefore, unless otherwise specified, it can be assumed that the content described in this application regarding APs also applies to the design of PCPs.

[0162] For ease of understanding, the process of high-frequency time-division beamforming training is described in detail with reference to FIG5 .

[0163] Figure 5 is a schematic diagram of time-division beamforming training. The process shown in Figure 5 enables two devices to complete beamforming training for both the transmitter and receiver. High-frequency beamforming training begins with the SLS phase initiated by the initiator (as shown in Figure 5). The purpose of the SLS phase is to ensure that the two devices can at least meet the requirements of high-robustness, low-rate communication. Generally speaking, the SLS phase only provides beamforming training for the transmitter (I-TXSS or R-TXSS, i.e., transmit sector sweep or responder receive sector sweep).

[0164] After the SLS phase, if required by the initiator or responder, a beam refinement protocol (BRP) phase may occur. The BRP phase provides receiver training and beam refinement (also known as AWV refinement) for both the transmitter and receiver. AWV stands for antenna weight vector, a vector of weights describing the excitation (amplitude and phase) for each element of an antenna array. The BRP phase includes, but is not limited to, beam refinement protocol establishment, multi-sector ID detection, sector grouping, and beam refinement processing.

[0165] Through this method, the two devices mutually obtain the optimal transmit beam for communication with each other. However, it should be noted that SLS generally only trains the transmit beam and does not train the receive beam direction. Therefore, it can only guarantee relatively basic communication requirements.

[0166] It should be understood that the SLS phase can occur in the DTI phase, or in the BTI and A-BFT phases. When the SLS phase occurs in the BTI and A-BFT phases, the sector scanning confirmation process in the SLS shown in the above figure does not exist.

[0167] It can be found that the above beam training is a time-division process, that is, the sending beam in time period one corresponds to direction one, and the sending beam in time period two corresponds to direction two. In addition, the receiving beam is also time-division, that is, when training the receiving beam, the receiving beam in time period three corresponds to direction three, and the receiving beam in time period four corresponds to direction four.

[0168] The above text, in combination with Figure 1, briefly introduces the scenarios in which the communication method provided in the embodiment of the present application can be applied, as well as the basic concepts that may be involved in the embodiment of the present application, and introduces time-division beam training in the basic concepts. From the above description of time-division beam training, it can be seen that: during the time-division beam training process, frequency resources are not fully utilized to save training overhead, resulting in large beam training overhead.

[0169] The present application provides a communication method to reduce the overhead of beam training. The communication method will be described in detail below with reference to FIG6 .

[0170] The technical solution provided by the present application will be described in detail below with reference to the accompanying drawings. The embodiments of the present application can be applied to a variety of different scenarios, including the scenario shown in FIG1 , but is not limited to this scenario.

[0171] It should be understood that the embodiments shown below do not particularly limit the specific structure of the execution subject of the method provided by the embodiments of the present application. As long as it is possible to communicate according to the method provided by the embodiments of the present application by running a program that records the code of the method provided by the embodiments of the present application, for example, the execution subject of the method provided by the embodiments of the present application can be a receiving device or a sending device, or a functional module in the receiving device or the sending device that can call and execute the program.

[0172] Below, without loss of generality, the communication method provided in the embodiment of the present application is described in detail by taking the interaction between the first station and the second station as an example. The first station involved in the embodiment of the present application can be an access point AP, and the second station can be a non-access point non-AP (such as STA); or, the first station can be an access point STA, and the second station can be a non-access point AP; or, the first station and the second station are access points AP; or, the first station and the second station are non-access points non-AP.

[0173] FIG6 is a schematic flow chart of a communication method provided in an embodiment of the present application, comprising the following steps:

[0174] S610: A first station sends a first PPDU to a second station. Correspondingly, the second station receives the first PPDU from the first station.

[0175] It should be understood that in this embodiment, the first site can send the first PPDU to multiple second sites, that is, there can be multiple receiving devices receiving the first PPDU. For the sake of convenience of description, this embodiment is explained by taking the example of the first site sending the first PPDU to a second site.

[0176] Specifically, the first PPDU includes a first field for beam training, the frequency domain range corresponding to the first field includes a first sub-frequency domain range and a second sub-frequency domain range, there are non-overlapping parts in the first sub-frequency domain range and the second sub-frequency domain range, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the first frequency domain range corresponding to the first PPDU.

[0177] Exemplarily, there is a non-overlapping part between the first sub-frequency domain range and the second sub-frequency domain range, including: the first sub-frequency domain range and the second sub-frequency domain range do not overlap at all, or, there is no intersection between the first sub-frequency domain range and the second sub-frequency domain range, or, the first sub-frequency domain range and the second sub-frequency domain range partially overlap.

[0178] For example, the frequency range corresponding to the first PPDU is a bandwidth of 80 MHz, the first sub-frequency domain range is a frequency domain range greater than or equal to 0 and less than or equal to 20 MHz, and the second sub-frequency domain range is a frequency domain range greater than or equal to 21 and less than or equal to 40 MHz; or, for example, the first sub-frequency domain range is a frequency domain range greater than or equal to 0 and less than or equal to 20 MHz, and the second sub-frequency domain range is a frequency domain range greater than or equal to 10 and less than or equal to 40 MHz.

[0179] The aforementioned first field is a time domain range in the time domain, for example, the first field is a training field. In this embodiment, there is no limitation on the name of the first field; any time domain range used to carry a beam can be referred to as the first field, for example, the first field can be referred to as a beam training field, a training field, a sector training field, etc. The frequency domain range corresponding to the first field can be the frequency domain range divided by the first field in the frequency domain; in other words, the frequency domain range carried by the first field in the frequency domain.

[0180] It should be understood that the first station can send a beam to the second station through the first PPDU to implement beam training. Specifically, the first station sends a first beam set within the first sub-frequency domain of the first field, and sends a second beam set within the second sub-frequency domain of the first field, wherein the first beam sent within the first sub-frequency domain at the first moment and the second beam sent within the second sub-frequency domain have different directions, the first beam belongs to the first beam set, and the second beam belongs to the second beam set.

[0181] Exemplarily, the above-mentioned first moment can be any moment within the first field, that is, within the time domain range indicated by the first field, there is a moment when the beam direction sent within the first sub-frequency domain range and the second sub-frequency domain range is different.

[0182] In this embodiment, the first site can send a first beam set within the first sub-frequency domain of the first field, and send a second beam set within the second sub-frequency domain of the first field. There is at least one moment in which the directions of the beams sent in different sub-frequency domains are different, thereby realizing frequency-division transmission of beams for beam training in different sub-frequency domains, realizing frequency-division beam training, and reducing the overhead of beam training.

[0183] It should be understood that this embodiment does not limit the specific transmission method of the beam set within different sub-frequency domains of the first station. For example, the first station can use the IFFT points of the entire first frequency range corresponding to the first PPDU in each sub-frequency domain for transmission. In this case, this transmission method can be understood as a special SU-MIMO (the constellation points carried by some subcarriers are at the origin). For example, the first station can also use dual-carrier transmission. This embodiment does not limit the beam transmission method, such as analog beamforming, hybrid beamforming, digital beamforming, etc.

[0184] In addition, this embodiment does not limit the transmission method of other fields in the first PPDU. For example, the preamble, data field, etc. in the first PPDU can also be transmitted in a frequency division manner to achieve beam tracking, multi-user communication, or multi-user frequency division training. It should be understood that this embodiment mainly describes the frequency division method corresponding to the first field used for beam training, and other frequency division transmission schemes (such as other fields are also transmitted in frequency division, or the first field is not transmitted in frequency division, while other fields (such as the preamble, data field) are transmitted in frequency division) are not described in detail.

[0185] For ease of understanding, a possible format of the first PPDU sent by the first station in this embodiment is described in detail with reference to FIG. 7 .

[0186] It can be seen from Figure 7 that the first PPDU includes a preamble code and a first field. The frequency domain range corresponding to the first field includes multiple sub-frequency domain ranges (such as sub-frequency domain range #1, sub-frequency domain range #2, sub-frequency domain range #3 and sub-frequency domain range #4 as shown in Figure 7). Each sub-frequency domain range is used to send a beam set (beamset), and the multiple sub-frequency domain ranges correspond to multiple beam sets (such as beam set #1, beam set #2, beam set #3 and beam set #4 as shown in Figure 7), wherein each beam set in the multiple beam sets includes at least one beam, that is, the first site sends multiple beam sets in different sub-frequency domain ranges on the first field by frequency division.

[0187] For example, in addition to the first field, the first PPDU in Figure 7 may also include one or more of the following fields, or the above-mentioned first field may include the functions of one or more of the following fields, such as preamble-related fields (such as LTF field, STF field, signaling field, etc.), data field, packet extension field, automatic gain control (AGC) field, etc. This application does not limit the specific format of the PPDU.

[0188] It should be understood that sub-frequency domain range #1, sub-frequency domain range #2, sub-frequency domain range #3 and sub-frequency domain range #4 in Figure 7 are only examples, indicating that the first field can correspond to multiple sub-frequency domain ranges, which are only used as a display of different sub-frequency domain ranges of frequency division. This application does not limit the number of sub-frequency domain ranges (greater than or equal to 2) separated by frequency under the first frequency range (or bandwidth) corresponding to the first PPDU for sending the beam set.

[0189] As can be seen from the above, the first station can send beams for beam training to other stations in a plurality of different sub-frequency domains corresponding to the first field in a frequency division manner. In order to enable the receiving end to know whether the subsequently received beams for beam training will be sent in a frequency division manner, the first station can send a related indication to the second station whether to use frequency division for beam training:

[0190] Exemplarily, the first site sends first indication information to the second site, where the first indication information is used to indicate one or more of the following information: the number of sub-frequency domain ranges corresponding to the first field, the size of the first sub-frequency domain range, or the size of the second sub-frequency domain range.

[0191] For example, when the first indication information indicates that the number of sub-frequency domain ranges corresponding to the first field is multiple, it is equivalent to the first indication information instructing to use a frequency division method to perform beam training.

[0192] For another example, when the first indication information indicates the sizes of multiple different sub-frequency domains, it is equivalent to the first indication information instructing to use a frequency division method to perform beam training.

[0193] Exemplarily, the first indication information may also be used to indicate that the frequency domain range corresponding to the first field includes multiple sub-frequency domain ranges.

[0194] For example, the first indication information may be 1 bit, the first value indicates that the frequency domain range corresponding to the first field has multiple sub-frequency domain ranges, and the second value indicates that the frequency domain range corresponding to the first field does not have multiple sub-frequency domain ranges.

[0195] To facilitate understanding, possible forms of the first indication information are described below with reference to specific examples.

[0196] Example 1: The first indication information indicates the number of sub-frequency domain ranges corresponding to the first field and / or the size of the sub-frequency domain range corresponding to the first field by indicating the size of the sub-frequency domain range.

[0197] For example, the first frequency domain range corresponding to the first PPDU is 80 MHz. If the first indication information indicates that the size of the sub-frequency domain range is 20 MHz, it can be understood that the number of sub-frequency domain ranges corresponding to the first field is 4, and the sizes of the 4 sub-frequency domain ranges are 0~20 MHz, 20~40 MHz, 40~60 MHz, and 60~80 MHz respectively.

[0198] Example 2: The first indication information indicates the number of sub-frequency domain ranges corresponding to the first field and / or the size of the sub-frequency domain range corresponding to the first field by indicating the number of sub-frequency domain ranges.

[0199] For example, the first frequency domain range corresponding to the first PPDU is 80 MHz. If the first indication information indicates that the number of sub-frequency domain ranges is 4, it can be understood that the number of sub-frequency domain ranges corresponding to the first field is 4, and the sizes of the 4 sub-frequency domain ranges are 0~20 MHz, 20~40 MHz, 40~60 MHz, and 60~80 MHz respectively.

[0200] Example 3: The first indication information indicates the number of sub-frequency domain ranges corresponding to the first field and / or the size of the sub-frequency domain range corresponding to the first field by indicating an index of the frequency division mode.

[0201] For example, the first site and the second site have negotiated in advance the frequency division mode indicated by the index of at least one frequency division mode, and the first site can indicate it by means of an index, such as the frequency division mode includes equal division mode 1 and equal division mode 2, wherein the index of equal division mode 1 is 1, indicating that the first frequency domain range corresponding to the first PPDU is equally divided into multiple 20MHz sub-frequency domain ranges; the index of equal division mode 2 is 2, indicating that the first frequency domain range corresponding to the first PPDU is equally divided into multiple 40MHz sub-frequency domain ranges.

[0202] When the first frequency domain range corresponding to the first PPDU is 80MHz, if the first indication information indicates that the index of the frequency division method is 1, it can be understood that the number of sub-frequency domain ranges corresponding to the first field is 4, and the sizes of the 4 sub-frequency domain ranges are 0~20MHz, 20~40MHz, 40~60MHz, and 60~80MHz respectively; if the first indication information indicates that the index of the frequency division method is 2, it can be understood that the number of sub-frequency domain ranges corresponding to the first field is 2, and the sizes of the 2 sub-frequency domain ranges are 0~40MHz and 40~80MHz respectively.

[0203] Example 4: The first indication information indicates the number of sub-frequency domain ranges corresponding to the first field and / or the size of the sub-frequency domain range corresponding to the first field via a bitmap. Each bit represents a minimum frequency domain granularity, and the channel division is indicated by alternating 0s and 1s. For example, the minimum frequency domain granularity is 20 MHz.

[0204] For example, the first frequency domain range corresponding to the first PPDU is 320MHz. If the first indication information is 0000 1111 0011 1111, it can be understood that the number of sub-frequency domain ranges corresponding to the first field is 4, the first sub-frequency domain range corresponds to 80MHz and its position, the second sub-frequency domain range corresponds to 80MHz and the frequency is higher than the first sub-frequency domain range, the third sub-frequency domain range corresponds to 40MHz, and the fourth sub-frequency domain range corresponds to 120MHz.

[0205] Optionally, the first indication information may be included in the preamble signaling, or in the MAC signaling, or may be information indicating the corresponding sub-frequency domain range in the preamble corresponding to each sub-frequency domain range. In addition, the first indication information may also be jointly indicated with other fields (e.g., preamble-related fields, data fields, packet extension fields, automatic gain control fields, etc.) to implement the content indicated by the above-mentioned first indication information.

[0206] It should be understood that this embodiment primarily involves the use of the first field for beam training, but does not limit other functions of the first field. For example, the first field can also be used for frequency-division information transmission, that is, the first field can function as a data field. This embodiment does not describe other functions of the first field in detail, but focuses on the use of the first field for beam training.

[0207] As mentioned above, the PPDU with integrated millimeter wave can be a clocked version of the PPDU based on the low-frequency OFDM format PPDU. Although some fields may be changed. For example, the PPDU with integrated millimeter wave can be the new generation of 802.11bn (UHR), and the specific UHR PPDU format is not limited. The following takes the PPDU carrying the first indication information as the VHT (as shown in Figure 8 (a)), HE (as shown in Figure 8 (b)), and EHT PPDU (as shown in Figure 3) in the 802.11 standard as an example to illustrate the possible location of the first indication information in the PPDU:

[0208] The first indication information may be in one or more of the following fields: L-SIG, RL-SIG, VHT-SIG-A, VHT-SIG-B, HE-SIG-A, HE-SIG-B, U-SIG, EHT-SIG, etc. In addition, the first indication information may also be present in various SIGs of various existing or future PPDUs, with no limitation on the name.

[0209] The first indication information may be combined with various fields / subfields to indicate first field related information.

[0210] Optionally, the first indication information may be present in a common field. Furthermore, the first indication information may be present in a resource unit allocation subfield, and different sub-frequency domain ranges may be indicated with the help of the resource unit allocation subfield. It should be understood that at this time, the frequency domain range indicated by the first indication information may no longer be the RU / MRU of data transmission, but the sub-frequency domain range of the first field. Alternatively, it can be considered that the RU / MRU allocation of the data field is the allocation of the sub-frequency domain range.

[0211] In addition, the first indication information may also exist in a field related to preamble puncturing, or may be jointly indicated with the field related to preamble puncturing to indicate the sub-frequency domain range.

[0212] In addition, the user-specific field can be used to carry specific configuration information of each sub-frequency domain, such as time division information, etc. In this case, the original meaning of the user field in the user-specific field can be rewritten, or a special user field can be added.

[0213] In addition, the Padding portion in the original SIG (such as EHT-SIG) may be used to indicate the first field related information.

[0214] In addition, at least one bit of frequency division indication information can be added to the SIG (such as U-SIG or EHT-SIG or SIG to be defined in the future, etc.) to indicate that the above-mentioned resource unit allocation subfield or user-specific field or Padding part has a new meaning and is used to carry the first indication information.

[0215] It should be understood that a Null Data Packet (NDP), i.e., a data-free PPDU, can also be designed for frequency division beamforming. In this case, the first indication information can be present in the NDP Announcement (NDPA) frame preceding the NDP, or can also be present in the SIG field of the NDP. The first indication information can be carried in combination with the above-mentioned resource unit allocation subfield and / or user-specific field.

[0216] As a possible implementation method, sending a first beam set in the first sub-frequency domain range, and sending a second beam set in the second sub-frequency domain range, includes: sending multiple beams in the first beam set in multiple first time domain ranges within the first sub-frequency domain range, and the directions of the multiple beams in the first beam set are different; and / or sending multiple beams in the second beam set in multiple second time domain ranges within the second sub-frequency domain range, and the directions of the multiple beams in the second beam set are different.

[0217] In this implementation, the first site may send beams in the beam set in a time-division manner within different sub-frequency domains of the first field.

[0218] Exemplarily, when the first beam set includes multiple beams, the multiple beams can be transmitted in time division within the first sub-frequency domain. For example, the first beam set includes a first beam #1, a first beam #2, and a first beam #3, wherein first beam #1 is transmitted within a first time domain range #1 within the first sub-frequency domain, first beam #2 is transmitted within a first time domain range #2 within the first sub-frequency domain, and first beam #3 is transmitted within a first time domain range #3 within the first sub-frequency domain, and beams #1, #2, and #3 have different beam directions.

[0219] It should be noted that in this embodiment, it is sufficient that the beam directions transmitted in different sub-frequency domains at least at a certain moment are different, and it is not limited to that all beam directions must be different. For example, in this embodiment, the directions of some beams transmitted in the first field can be the same as the direction of the preamble; or, as another example, in this embodiment, the beam directions transmitted in a certain sub-frequency range in the first field can all be the same; or, as another example, in this embodiment, the beam directions within a certain time period in the first field can all be the same, and so on, without limitation.

[0220] For example, multiple beams can be sent in a first time domain range within the first sub-frequency domain range, such as, the first beam set includes the first beam #1 and the first beam #4, and the first beam #1 and the first beam #4 are both sent in the first time domain range #1 within the first sub-frequency domain range, and the first beam #4 has the same or different direction as the above-mentioned first beam #1.

[0221] For example, the beam directions of the first beam #5 and the first beam #6 transmitted within the first sub-frequency domain during a certain period of the first field, and the second beam #5 and the second beam #6 transmitted within the first sub-frequency domain are the same.

[0222] Optionally, the aforementioned time domain range can be referred to as a beam training unit, with each beam training unit corresponding to a set of beam configurations. A simple set of beam configurations can correspond to a single transmission direction or multiple transmission directions, with no restriction on repeated transmissions in the same direction. Overall, the division of beam training units facilitates time-division training and signaling.

[0223] Furthermore, the time domain range may be divided differently in different sub-frequency domain ranges.

[0224] For ease of understanding, different division methods of sub-frequency domains and different division methods of time domains within sub-frequency domains are briefly described below with reference to (a) and (b) in FIG9 .

[0225] As can be seen from Figure 9 (a), the frequency domain range corresponding to the first field is divided into four sub-frequency domain ranges (sub-frequency domain range #1, sub-frequency domain range #2, sub-frequency domain range #3, and sub-frequency domain range #4 as shown in Figure 9 (a), and the frequency domain range corresponding to each sub-frequency domain range is the same size, which is equivalent to the frequency domain range corresponding to the first field being divided into four segments. The number of time domain ranges in different sub-frequency domain ranges is the same, and each time domain range includes at least one beam transmitting unit.

[0226] It can be seen from Figure 9 (b) that the frequency domain range corresponding to the first field is divided into three sub-frequency domain ranges (sub-frequency domain range #1, sub-frequency domain range #2 and sub-frequency domain range #3 as shown in Figure 9 (b)), among which the frequency domain range size corresponding to sub-frequency domain range #1 is different from the frequency domain range sizes corresponding to sub-frequency domain range #2 and sub-frequency domain range #3, and different sub-frequency domain ranges are divided into different numbers of time domain ranges (as shown in Figure 9 (b)), the time domain ranges divided by sub-frequency domain range #1 are 4, and the time domain ranges divided by sub-frequency domain range #3 are 5).

[0227] As can be seen from the above, the first station can send beams for beam training to other stations in the sub-frequency domain in a time-division manner. In order to enable the receiving end to know how the beams for beam training subsequently received are sent in a time-division manner, the first station can send relevant instructions to the second station to use the time-division method for beam training:

[0228] Exemplarily, the first site sends second indication information to the second site, and the second indication information is used to indicate at least one of the following information: the number of the first time domain ranges corresponding to the first sub-frequency domain range, the configuration information of the first time domain range, the length of the training field in the first time domain range, the number of training field symbols in the first time domain range, the number of the second time domain ranges corresponding to the second sub-frequency domain range, the configuration information of the second time domain range, the length of the training field in the second time domain range, and the number of training field symbols in the second time domain range.

[0229] Furthermore, the first site may send information related to the beam ID (such as sector ID, antenna ID, antenna weight vector ID, etc.) to the second site. The ID may be used to mark the beam corresponding to the training unit or multiple beams within the training unit, etc.

[0230] Optionally, the second indication information may be included in the preamble signaling, or in the MAC signaling, or may be information indicating the corresponding sub-frequency domain range in the preamble corresponding to each sub-frequency domain range. In addition, the second indication information may also be jointly indicated with other fields (e.g., preamble-related fields, data fields, packet extension fields, automatic gain control fields, etc.) to implement the content indicated by the above-mentioned second indication information.

[0231] It should be understood that the signaling information regarding the first field in this embodiment, including frequency division information, time division information, etc., such as the first indication information and / or second indication information described above, can be exchanged in other PPDUs before the first PPDU in which the first field is located. For example, a beam training declaration frame, a beam training notification frame, a beam training establishment frame, etc. can be used to notify the configuration information of the first field in advance. This is not further described here.

[0232] It should be noted that in this embodiment, the first station sending a beam to the second station is equivalent to the first station sending a sequence corresponding to the beam to the second station, wherein the sequence corresponding to the first beam set sent on the subcarriers in the first subfrequency domain range is the first sequence, and the sequence corresponding to the second beam set sent on the subcarriers in the second subfrequency domain range is the second sequence. In this embodiment, the first sequence and the second sequence are determined in the following ways, but are not limited to:

[0233] Method 1: Determine the first sequence and the second sequence based on the sequence corresponding to the first frequency domain range.

[0234] In the case shown in the first embodiment, the first sequence is a partial sequence of a sequence corresponding to the first frequency domain range sent on at least one first subcarrier, and the second sequence is a partial sequence of a sequence corresponding to the first frequency domain range sent on at least one second subcarrier.

[0235] The position of the at least one first subcarrier is the same as the position of the subcarrier in the first subfrequency domain range. In addition, the position of the at least one second subcarrier is the same as the position of the subcarrier in the second subfrequency domain range. For example, the index of the at least one first subcarrier is the same as the index of the subcarrier in the first subfrequency domain range, and the index of the at least one second subcarrier is the same as the index of the subcarrier in the second subfrequency domain range.

[0236] or,

[0237] The sequence corresponding to the first frequency domain range is randomly divided into a first sequence and a second sequence, wherein the first sequence is a sequence corresponding to the first beam set sent on the subcarriers of the first sub-frequency domain range; the second sequence is a sequence corresponding to the second beam set sent on the subcarriers of the second sub-frequency domain range.

[0238] It should be understood that the above-mentioned method of determining the first sequence and the second sequence based on the sequence corresponding to the first frequency domain range is only an example and does not constitute any limitation on the scope of protection of this application. Other methods of determining the first sequence and the second sequence based on the sequence corresponding to the first frequency domain range are also within the scope of protection of this application.

[0239] Exemplarily, the sequence corresponding to the first frequency domain range includes a short training field STF sequence or a long training field LTF sequence for the first bandwidth. The sequence corresponding to the first frequency domain range represents a constellation point carried by the subcarriers of the first frequency domain range. For example, the STF sequence or LTF sequence for the first bandwidth includes, but is not limited to, L-STF, L-LTF, and STFs and LTFs specific to each generation of standards, such as HE-LTF, EHT-STF, etc.

[0240] For ease of understanding, this method is described in detail with reference to FIG10(a), which shows the form of the sequence corresponding to the beam.

[0241] Assume that the bandwidth corresponding to the first PPDU is X, the frequency range corresponding to the sub-frequency domain range after frequency division is Y, and X is divisible by Y. The first PPDU with bandwidth X already has a non-frequency-divided beam training sequence S1. The non-frequency-divided beam training sequence S1 based on the first PPDU with bandwidth X is sent in a divided manner, that is, the sequence sent by the subcarriers in the corresponding sub-frequency domain range is the sequence corresponding to the subcarriers in the same position as the beam training sequence S1.

[0242] As can be seen from Figure 10 (a), the first field is carried in four sub-frequency domain ranges, such as sub-frequency domain range #1, sub-frequency domain range #2, sub-frequency domain range #3 and sub-frequency domain range #4, where the sequence sent by the subcarriers of sub-frequency domain range #1 (such as the sub-frequency domain range #1 sequence shown in Figure 10 (a)) is the sequence corresponding to the subcarriers at the same position corresponding to the beam training sequence S1; the sequence sent by the subcarriers of sub-frequency domain range #2 (such as the sub-frequency domain range #2 sequence shown in Figure 10 (a)) is the sequence corresponding to the subcarriers at the same position corresponding to the beam training sequence S1; the sequence sent by the subcarriers of sub-frequency domain range #3 (such as the sub-frequency domain range #3 sequence shown in Figure 10 (a)) is the sequence corresponding to the subcarriers at the same position corresponding to the beam training sequence S1; the sequence sent by the subcarriers of sub-frequency domain range #4 (such as the sub-frequency domain range #4 sequence shown in Figure 10 (a)) is the sequence corresponding to the subcarriers at the same position corresponding to the beam training sequence S1.

[0243] Method 2: Determine the first sequence and the second sequence based on sequences corresponding to different sub-frequency domain ranges.

[0244] In the case shown in the second embodiment, the first sequence is a sequence corresponding to the first sub-frequency domain range, and the second sequence is a sequence corresponding to the second sub-frequency domain range.

[0245] Exemplarily, the sequence corresponding to the first sub-frequency range includes a short training field (STF) sequence or a long training field (LTF) sequence for the first sub-frequency range; and / or the sequence corresponding to the second sub-frequency range includes a short training field (STF) sequence or a long training field (LTF) sequence for the second sub-frequency range. For example, the STF sequence or LTF sequence for the first sub-frequency range or the second sub-frequency range includes, but is not limited to, L-STF, L-LTF, and STFs and LTFs specific to each generation of standards, such as HE-LTF and EHT-STF.

[0246] For ease of understanding, the format of the sequence corresponding to the beam in this second approach is detailed in conjunction with Figure 10(b). Assume that the first PPDU corresponds to bandwidth X, the sub-frequency domain range after frequency division corresponds to frequency range Y, and X is divisible by Y. A non-frequency-divided beam training sequence S2 already exists for bandwidth Y.

[0247] As can be seen from Figure 10 (b), the first field is carried in four sub-frequency domain ranges, such as sub-frequency domain range #1, sub-frequency domain range #2, sub-frequency domain range #3 and sub-frequency domain range #4, among which the sequence sent by the subcarriers of sub-frequency domain range #1 (such as the sub-frequency domain range #1 sequence shown in Figure 10 (b)) is the beam training sequence S2; the sequence sent by the subcarriers of sub-frequency domain range #2 (such as the sub-frequency domain range #2 sequence shown in Figure 10 (b)) is the beam training sequence S2; the sequence sent by the subcarriers of sub-frequency domain range #3 (such as the sub-frequency domain range #3 sequence shown in Figure 10 (b)) is the beam training sequence S2; the sequence sent by the subcarriers of sub-frequency domain range #4 (such as the sub-frequency domain range #4 sequence shown in Figure 10 (b)) is the beam training sequence S2.

[0248] It should be understood that (a) and (b) in Figure 10 are only illustrative examples of the form of the sequence corresponding to the beam transmitted on different sub-frequency domain ranges in this embodiment, and do not constitute any limitation on the protection scope of this application. The form of the sequence corresponding to the beam transmitted on the pilot in this embodiment may also include other possibilities. For example, the bandwidths corresponding to different sub-frequency domain ranges are different, such as Y1 corresponding to sub-frequency domain range #1, Y2 corresponding to sub-frequency domain range #2, Y3 corresponding to sub-frequency domain range #3, and Y4 corresponding to sub-frequency domain range #4. Then the sequence of sub-frequency domain range #1 is the non-frequency-divided beam training sequence S3 of the PPDU with a bandwidth of Y1, the sequence of sub-frequency domain range #2 is the non-frequency-divided beam training sequence S4 of the PPDU with a bandwidth of Y2, the sequence of sub-frequency domain range #3 is the non-frequency-divided beam training sequence S5 of the PPDU with a bandwidth of Y3, and the sequence of sub-frequency domain range #4 is the non-frequency-divided beam training sequence S6 of the PPDU with a bandwidth of Y4, etc., and examples will not be given one by one here.

[0249] Specifically, in this embodiment, the receiving end may feed back beam-related measurement information to the first site, such as channel state information, signal-to-noise ratio information, delay information, etc. The method flow shown in FIG6 further includes:

[0250] S620: The second site sends a response message to the first site. Correspondingly, the first site receives the response message from the second site.

[0251] Specifically, the response message includes an identifier of the third beam and / or location information of the third beam, where the location information of the third beam is used to indicate the frequency domain range and time domain range corresponding to the third beam. It should be understood that in this embodiment, the second station, as a receiving end, is capable of receiving beams within multiple frequency domain ranges and detecting which frequency domain range beam meets the requirements.

[0252] Illustratively, the third beam is a beam that meets the requirements and is obtained by the second station through beam training. It can be a beam in the first beam set or the second beam set, or another beam that meets the requirements. This embodiment does not limit how the second station performs beam training to obtain a beam that meets the requirements. For details, please refer to the description of beam training in the current related art, and will not be described in detail here.

[0253] In this embodiment, after determining at least one beam that meets the requirements, the second site can report the relevant beam information to the first site through a response message. For the sake of convenience of description, the example of the second site reporting the information of a certain beam (such as the third beam) is used for explanation.

[0254] As a possible implementation method, the second site can display the identification information of the beam in the response message, for example, the response message includes the identification of the third beam.

[0255] Optionally, the response message also includes measurement information of the third beam. In this implementation, the second site can feed back the beam-related measurement information together with the beam identifier. For example, (beam identifier 1, measurement information) + (beam identifier 2, measurement information), etc., where the beam identifier can include any one or more of the following information: beam ID, or sector ID, antenna ID, antenna weight vector ID, etc., which can be used to identify the beam. This application does not limit this.

[0256] As another possible implementation, the second site may implicitly indicate the third beam by carrying the location information of the third beam in the response message.

[0257] Exemplarily, the position information of the third beam includes:

[0258] The identifier of the frequency domain range corresponding to the third beam and the identifier of the time domain range corresponding to the third beam; or, the position identifier corresponding to the third beam, the position identifier being the identifier corresponding to the third beam among the multiple position identifiers sequentially identified from front to back in the time domain and from low frequency to high frequency in the frequency domain of the first field.

[0259] For ease of understanding, the position information of the beam is briefly described with reference to (a) and (b) in FIG11 .

[0260] As can be seen from Figure 11 (a), the beam position information is a two-dimensional identifier including the identifier of the frequency domain range and the identifier of the time domain range. For example, the first field is carried in four sub-frequency domain ranges, such as sub-frequency domain range #1, sub-frequency domain range #2, sub-frequency domain range #3 and sub-frequency domain range #4, where the beam position identifier sent in sub-frequency domain range #1 is (1,1); sub-frequency domain range #2 is divided into time domain range 1 and time domain range 2, that is, the beam position identifier sent in time domain range 1 of sub-frequency domain range #2 is (2,1), and the beam position identifier sent in time domain range 2 of sub-frequency domain range #2 is (2,1). The sub-frequency domain range #3 is divided into time domain range 1, time domain range 2, time domain range 3 and time domain range 4, that is, the beam position of the time domain range 1 of the sub-frequency domain range #3 is identified as (3,1), the beam position of the time domain range 2 of the sub-frequency domain range #3 is identified as (3,2), the beam position of the time domain range 3 of the sub-frequency domain range #3 is identified as (3,3), and the beam position of the time domain range 4 of the sub-frequency domain range #3 is identified as (3,1). The position identifier is (3,4); the sub-frequency domain range #4 is divided into time domain range 1, time domain range 2, time domain range 3, time domain range 4, time domain range 5, time domain range 6, time domain range 7 and time domain range 8, that is, the beam position identifier of the time domain range 1 of the sub-frequency domain range #4 is (4,1), the beam position identifier of the time domain range 2 of the sub-frequency domain range #4 is (4,2), and the beam position identifier of the time domain range 3 of the sub-frequency domain range #4 is (4,3), the beam position identification of time domain range 4 of sub-frequency domain range #4 is (4,4), the beam position identification of time domain range 5 of sub-frequency domain range #4 is (4,5), the beam position identification of time domain range 6 of sub-frequency domain range #4 is (4,6), the beam position identification of time domain range 7 of sub-frequency domain range #4 is (4,7), and the beam position identification of time domain range 8 of sub-frequency domain range #4 is (4,8).

[0261] It can be seen from Figure 11 (a) that the position information of the beam is within a certain frequency domain range (e.g., the first frequency domain range corresponding to the first PPDU) and a certain time domain range (e.g., the first field), and is divided into multiple positions in the time domain and frequency domain respectively. After unified numbering, the position corresponding to a certain number is equivalent to a one-dimensional identifier including time domain position information and frequency domain position information. For example, the first field is carried in 4 sub-frequency domain ranges, such as sub-frequency domain range #1, sub-frequency domain range #2, sub-frequency domain range #3 and sub-frequency domain range #4, where sub-frequency domain range #1 corresponds to a time domain range, sub-frequency domain range #2 is divided into time domain range 1 and time domain range 2, sub-frequency domain range #3 is divided into time domain range 1, time domain range 2, time domain range 3 and time domain range 4, and sub-frequency domain range #4 is divided into time domain range 1, time domain range 2, time domain range 3, time domain range 4, time domain range 5, time domain range 6, time domain range 7 and time domain range 8. Therefore, the multiple positions sequentially identified from front to back in the time domain and from low frequency to high frequency in the frequency domain are 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 respectively.

[0262] If the second site determines through beam training that beam #1 sent in time domain range 1 within sub-frequency domain range #2 meets the conditions, the second site can feedback the position information of beam #1, such as feedback of two-dimensional position information (2,1) or feedback of one-dimensional position information 2.

[0263] In the communication method shown in Figure 6, the first PPDU sent by the first station carries a first field (such as a training field) for beam training, and the frequency domain range corresponding to the first field includes a first sub-frequency domain range and a second sub-frequency domain range. Specifically, there is a non-overlapping part between the first sub-frequency domain range and the second sub-frequency domain range, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the frequency domain range of the first station sending the first PPDU. The first station can send the first beam set within the first sub-frequency domain range of the first field, and send the second beam set within the second sub-frequency domain range of the first field. There is at least one moment in which the beam directions sent in different sub-frequency domain ranges are different, thereby realizing frequency-division transmission of beams for beam training in different sub-frequency domain ranges, realizing frequency-division beam training, and reducing the overhead of beam training.

[0264] This application also provides a communication method, in which a station can trigger other stations to perform beam training in a frequency division manner. The communication method will be described in detail below with reference to FIG12.

[0265] FIG12 is a schematic flow chart of a communication method provided in an embodiment of the present application, comprising the following steps:

[0266] S1210: Generate trigger information.

[0267] Specifically, when determining to trigger at least one device to send a beam for beam training in a frequency division manner, the site generates trigger information, where the trigger information is used to instruct the at least one device to send a beam for beam training in a frequency division manner.

[0268] It should be understood that in this embodiment, there is no limitation on the conditions for a site to generate trigger information. The site may determine on its own that trigger information needs to be generated, or the management device may instruct the site to generate trigger information.

[0269] Exemplarily, the trigger information may be carried in a certain PPDU. For ease of understanding, possible forms of the trigger information are briefly introduced with reference to (a) and (b) in FIG. 13 .

[0270] As an example but not a limitation, the trigger information in this embodiment may be sub-banded in a trigger frame, where the trigger frame is used to schedule uplink transmission.

[0271] Exemplarily, the AP scheduling uplink transmission through a trigger frame includes:

[0272] Step 1: The AP first sends a trigger frame, which contains resource scheduling and other parameters for one or more STAs to send high-efficiency trigger-based physical layer protocol data units (High Efficient Trigger Based PHY Protocol Data Unit, HE TB PPDU). The trigger frame format is shown in Figure 13 (a).

[0273] As can be seen from Figure 13 (a), the trigger frame includes a Common Info field and a User Info List field. The Common Info field contains common information that all STAs need to read. The UL Bandwidth field indicates the bandwidth of the HE TB PPDU it triggers. It has two bits, 00 for 20 MHz, 01 for 40 MHz, 10 for 80 MHz, and 11 for 160 MHz or 80+80 MHz. 80+80 MHz refers to the case where two 80 MHz bands are discontinuous. The User Info List field consists of one or more User Info fields, each of which contains information that each STA needs to read. In the User Info field, the Association Identification 12 (AID12, representing the lower 12 bits of the AID) indicates the site identifier of a particular STA, and the Resource Unit Allocation subfield (RU Allocation) indicates the specific Resource Unit (RU) location allocated to this STA (the STA indicated by AID12). The specific contents of the public information field and the user information field are shown in FIG13( b ).

[0274] Step 2: After receiving the trigger frame, the STA sends the HE TB PPDU according to the trigger frame. For example, the STA parses the user information field that matches its own AID from the trigger frame, and then sends the HE TB PPDU on the RU indicated by the resource unit allocation subfield in the user information field. The names and simple functions of each field of the PPDU are shown in Table 2 below:

[0275] Table 2

[0276] In the HE-SIG-A field in the HE TB PPDU, there is a bandwidth (BW) field, which indicates the bandwidth of the HE TB PPDU. It is also 2 bits, and its content and meaning are equal to the UL BW field in the trigger frame.

[0277] Step 3: After receiving the HE TB PPDU sent by the STA, the AP sends an acknowledgment frame to the STA.

[0278] 802.11be inherits the trigger-based transmission design of 802.11ax. 802.11be trigger frames reuse the trigger frame types and subtypes of 802.11ax, allowing them to be received and understood by both HE STAs and EHT STAs. They are designed to trigger HE TB PPDUs, EHT TB PPDUs, or a combination of HE TB PPDUs and EHT TB PPDUs. The trigger frame design of 802.11be is not detailed here.

[0279] For example, the trigger information can be present in the common field of the trigger frame or in the user information field of the trigger frame. Information required by all users can be placed in the common field, while information required of each user can be primarily placed in the user information field. The resource unit allocation field can be combined to indicate one or more sub-frequency domain ranges corresponding to a particular user.

[0280] In addition, a new trigger frame type can be designed to trigger the PPDU used for beam training (this is not limited to frequency-division PPDUs; traditional time-division beam training PPDUs can also use this method). This PPDU can be a traditional TB (Trigger-based) PPDU, a new type of TB PPDU, or any other name without limitation.

[0281] S1220: The site sends trigger information.

[0282] Specifically, the trigger information is used to instruct frequency division to transmit a beam for beam training. The trigger information may be a request frame, a trigger frame, or the like.

[0283] As a possible implementation manner, the station may instruct a certain device to frequency-divide and send a beam for beam training through trigger information.

[0284] For example, the site sends a third indication message, and the third indication message is used to instruct the first device to send a second field for beam training. The frequency domain range corresponding to the second field includes a third sub-frequency domain range and a fourth sub-frequency domain range. The beam sent in the third sub-frequency domain range at the second moment is different from the beam sent in the fourth sub-frequency domain range.

[0285] In this implementation mode, the first device can send beams for beam training in a frequency division manner. For example, the first device sends a third beam set within the third sub-frequency domain of the second field, and sends a fourth beam set within the fourth sub-frequency domain of the second field, wherein the third beam sent within the third sub-frequency domain at the second moment and the fourth beam sent within the fourth sub-frequency domain have different directions, the third beam belongs to the third beam set, and the fourth beam belongs to the fourth beam set.

[0286] In this implementation, the manner in which the first device frequency-divides and sends a beam for beam training can refer to the description related to the manner in which the first site frequency-divides and sends a beam for beam training in the communication method shown in FIG6 , and will not be repeated here.

[0287] As another possible implementation manner, the station may instruct multiple devices to frequency-divide and transmit beams for beam training through trigger information.

[0288] For example, the site sends fourth indication information, and the fourth indication information is used to instruct the first device to send a third field for beam training, and to instruct the second device to send a fourth field for beam training. The frequency domain range corresponding to the third field includes the fifth sub-frequency domain range, and the frequency domain range corresponding to the fourth field includes the sixth sub-frequency domain range. The beam sent in the fifth sub-frequency domain range at the third moment is different from the beam sent in the sixth sub-frequency domain range.

[0289] Under this implementation method, beams for beam training can be sent between the first device and the second device in a frequency division manner. For example, the first device sends the fifth beam set within the fifth sub-frequency domain of the second field, and the second device sends the sixth beam set within the sixth sub-frequency domain of the third field. wherein, at the third moment, the fifth beam sent by the first device within the fifth sub-frequency domain and the sixth beam sent by the second device within the sixth sub-frequency domain have different directions, the fifth beam belongs to the fifth beam set, and the sixth beam belongs to the sixth beam set.

[0290] In this implementation mode, the manner in which the first device and the second device transmit beams for beam training through frequency division can refer to the description related to the frequency division transmission of the beam for beam training by the first site in the communication method shown in Figure 6. The difference is that in this implementation mode, the first device and the second device respectively transmit beams within different sub-frequency domains to realize frequency division transmission of beams for beam training, which will not be repeated here.

[0291] Exemplarily, the station sends the fourth indication information in the following possible ways:

[0292] The fourth indication information is sent within a sub-frequency domain corresponding to a fourth beam, and the first device and the second device are within a preset range of beam directions corresponding to the fourth beam; or

[0293] The fourth indication information is sent within the sub-frequency domain range corresponding to the fourth beam and the sub-frequency domain range corresponding to the fifth beam, respectively, the first device is within the preset range of the beam direction corresponding to the fourth beam, the second device is within the preset range of the beam direction corresponding to the fifth beam, and the directions of the fourth beam and the fifth beam are different; or

[0294] The fourth indication information is sent in a frequency domain range outside the first frequency domain range.

[0295] To make it easier to understand, here are some examples:

[0296] Example 1: The site sends trigger information to multiple devices without frequency division, and the multiple devices transmit beams for beam training using frequency division between them, as shown in Figure 13(c). The site sends trigger information within the sub-frequency domain corresponding to the fourth beam. Multiple devices within the preset range of the beam direction corresponding to the fourth beam can receive the trigger information sent by the site in the direction of the fourth beam and can also transmit beams for beam training using frequency division within the fifth and sixth sub-frequency domains.

[0297] The method of sending trigger information shown in Example 1 is applicable when multiple devices are sending the beam direction corresponding to the trigger information, or when multiple devices can receive the trigger information sent by the site in the beam direction. The trigger information can be carried in the PPDU.

[0298] For example, the site in this embodiment is the first site in the communication method shown in Figure 6, and the trigger information can be carried in the above-mentioned first PPDU, indicating that at least one second site also sends a beam for beam training in a frequency division manner.

[0299] Example 2: A station sends trigger information to multiple devices in a frequency-division manner, and beams used for beam training are transmitted between the multiple devices in a frequency-division manner, as shown in Figure 13(d). The station sends fourth indication information within the sub-frequency domain corresponding to the fourth beam and the sub-frequency domain corresponding to the fifth beam, respectively. The first device is within the preset beam direction range corresponding to the fourth beam, and the second device is within the preset beam direction range corresponding to the fifth beam. The directions of the fourth and fifth beams are different.

[0300] The method for sending trigger information shown in Example 2 is applicable to the situation where multiple devices are not in the same direction of the site, and the site supports multi-directional frequency division sending of trigger information.

[0301] Example 3: The site sends trigger information at a low frequency (the previous two examples are high frequency), and at least one device sends a beam for beam training at a high frequency through frequency division.

[0302] It should be understood that the size of the serial numbers of the above processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0303] It should also be understood that in the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0304] It should also be understood that in some of the above embodiments, devices in existing network architectures are mainly used as examples for illustrative purposes, and it should be understood that the embodiments of the present application do not limit the specific form of the devices. For example, devices that can achieve the same functions in the future are applicable to the embodiments of the present application.

[0305] It can be understood that in the above-mentioned various method embodiments, the methods and operations implemented by the device (such as the first site and the second site) can also be implemented by components that can be used in the device (such as chips or circuits).

[0306] It can also be understood that some optional features in the various embodiments of the present application may not depend on other features in certain scenarios, and may also be combined with other features in certain scenarios, without limitation.

[0307] The communication method provided in the embodiments of the present application is described in detail above with reference to Figures 6 and 12 . The communication method is primarily described from the perspectives of the first site and the second site. It is understood that, in order to implement the aforementioned functions, the first site and the second site include hardware structures and / or software modules corresponding to the respective functions.

[0308] Those skilled in the art should be aware that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0309] The communication device provided in the embodiment of the present application is described in detail below with reference to Figures 14 to 16. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment. Therefore, for matters not described in detail, reference can be made to the method embodiment above. For the sake of brevity, some contents are not repeated here.

[0310] In the embodiment of the present application, the functional modules of the transmitting device or the receiving device can be divided according to the above method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation. The following is an example of dividing each functional module according to each function.

[0311] Figure 14 is a schematic block diagram of a communication device 10 provided in an embodiment of the present application. The device 10 includes a transceiver module 11 and a processing module 12. The transceiver module 11 can implement corresponding communication functions, and the processing module 12 is used to process data. In other words, the transceiver module 11 is used to perform operations related to receiving and sending, and the processing module 12 is used to perform other operations besides receiving and sending. The transceiver module 11 can also be referred to as a communication interface or a communication unit.

[0312] Optionally, the device 10 may further include a storage module 13, which may be used to store instructions and / or data. The processing module 12 may read the instructions and / or data in the storage module so that the device implements the actions of the devices in the aforementioned method embodiments.

[0313] In one design, the device 10 may correspond to the first station in the above method embodiment, or a component (such as a chip) of the first station.

[0314] The device 10 can implement the steps or processes corresponding to those performed by the first site in the above method embodiment, wherein the transceiver module 11 can be used to perform the transceiver-related operations of the first site in the above method embodiment, and the processing module 12 can be used to perform the processing-related operations of the first site in the above method embodiment.

[0315] In one possible implementation, the transceiver module 11 is configured to receive a first physical layer protocol data unit PPDU, wherein the first PPDU includes a first field for beam training, the frequency domain range corresponding to the first field includes a first sub-frequency domain range and a second sub-frequency domain range, the first sub-frequency domain range and the second sub-frequency domain range have non-overlapping parts, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the first frequency domain range corresponding to the first PPDU. The transceiver module 11 is further configured to receive a first beam set within the first sub-frequency domain range of the first field, and to receive a second beam set within the second sub-frequency domain range of the first field, wherein the first beam received within the first sub-frequency domain range at a first moment and the second beam received within the second sub-frequency domain range have different directions, the first beam belongs to the first beam set, and the second beam belongs to the second beam set.

[0316] In another possible implementation, the transceiver module 11 is used to send a first physical layer protocol data unit PPDU and first indication information, wherein the first PPDU includes a first field for beam training, and the frequency domain range corresponding to the first field includes a first sub-frequency domain range and a second sub-frequency domain range. The first indication information is used to indicate the size of the first sub-frequency domain range and the size of the second sub-frequency domain range, wherein there is a non-overlapping part between the first sub-frequency domain range and the second sub-frequency domain range, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the first frequency domain range corresponding to the first PPDU.

[0317] In another possible implementation, the transceiver module 11 is used to send a third indication information, wherein the third indication information is used to instruct the first device to send a second field for beam training, the frequency domain range corresponding to the second field includes a third sub-frequency domain range and a fourth sub-frequency domain range, and the beam sent in the third sub-frequency domain range at the second moment is different from the beam sent in the fourth sub-frequency domain range.

[0318] In another possible implementation, the transceiver module 11 is used to send a fourth indication information, wherein the fourth indication information is used to instruct the first device to send a third field for beam training, and to instruct the second device to send a fourth field for beam training, the frequency domain range corresponding to the third field includes a fifth sub-frequency domain range, and the frequency domain range corresponding to the fourth field includes a sixth sub-frequency domain range. The beam sent in the fifth sub-frequency domain range at the third moment is different from the beam sent in the sixth sub-frequency domain range.

[0319] When the device 10 is used to execute the method in FIG6 , the transceiver module 11 may be used to execute the steps of sending and receiving information in the method, such as steps S610 and S620 , and the processing module 12 may be used to execute the processing steps in the method.

[0320] When the device 10 is used to execute the method in Figure 12, the transceiver module 11 can be used to execute the steps of sending and receiving information in the method, such as step S1220, and the processing module 12 can be used to execute the processing steps in the method, such as step S1210.

[0321] It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0322] In another design, the device 10 may correspond to the second site in the above method embodiment, or be a component of the second site (such as a chip).

[0323] The device 10 can implement the steps or processes corresponding to those performed by the second site in the above method embodiment, wherein the transceiver module 11 can be used to perform the transceiver-related operations of the second site in the above method embodiment, and the processing module 12 can be used to perform the processing-related operations of the second site in the above method embodiment.

[0324] In one possible implementation, the transceiver module 11 is used to receive a first physical layer protocol data unit PPDU, wherein the first PPDU includes a first field for beam training, the frequency domain range corresponding to the first field includes a first sub-frequency domain range and a second sub-frequency domain range, the first sub-frequency domain range and the second sub-frequency domain range have non-overlapping parts, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the first frequency domain range corresponding to the first PPDU; the transceiver module 11 is used to receive a first beam set within the first sub-frequency domain range of the first field, and to receive a second beam set within the second sub-frequency domain range of the first field, wherein the first beam received within the first sub-frequency domain range at a first moment and the second beam received within the second sub-frequency domain range have different directions, the first beam belongs to the first beam set, and the second beam belongs to the second beam set.

[0325] In another possible implementation, the transceiver module 11 is used to receive a first physical layer protocol data unit PPDU and first indication information, wherein the first PPDU includes a first field for beam training, and the frequency domain range corresponding to the first field includes a first sub-frequency domain range and a second sub-frequency domain range, and the first indication information is used to indicate the size of the first sub-frequency domain range and the size of the second sub-frequency domain range, wherein there is a non-overlapping part between the first sub-frequency domain range and the second sub-frequency domain range, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the first frequency domain range corresponding to the first PPDU.

[0326] In another possible implementation, the transceiver module 11 is used to receive a third indication information, where the third indication information is used to instruct the first device to send a second field for beam training, where the frequency domain range corresponding to the second field includes a third sub-frequency domain range and a fourth sub-frequency domain range, and the beam sent in the third sub-frequency domain range at the second moment is different from the beam sent in the fourth sub-frequency domain range.

[0327] When the device 10 is used to execute the method in FIG6 , the transceiver module 11 may be used to execute the steps of sending and receiving information in the method, such as steps S610 and S620 , and the processing module 12 may be used to execute the processing steps in the method.

[0328] When the device 10 is used to execute the method in FIG. 12 , the transceiver module 11 may be used to execute the steps of sending and receiving information in the method, such as step S1220 , and the processing module 12 may be used to execute the processing steps in the method.

[0329] It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0330] It should also be understood that the device 10 here is embodied in the form of a functional module. The term "module" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and memory for executing one or more software or firmware programs, a combined logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art will understand that the device 10 may be specifically the mobile management network element in the above-mentioned embodiment, and may be used to execute the various processes and / or steps corresponding to the mobile management network element in the above-mentioned method embodiments; or, the device 10 may be specifically the terminal device in the above-mentioned embodiment, and may be used to execute the various processes and / or steps corresponding to the terminal device in the above-mentioned method embodiments. To avoid repetition, it will not be described here.

[0331] The apparatus 10 of each of the above-described solutions has the function of implementing the corresponding steps performed by the device (e.g., the first station) in the above-described method. This function can be implemented by hardware, or by hardware executing corresponding software implementations. The hardware or software includes one or more modules corresponding to the above-described functions; for example, the transceiver module can be replaced by a transceiver (e.g., the transmitting unit in the transceiver module can be replaced by a transmitter, and the receiving unit in the transceiver module can be replaced by a receiver), and other units, such as the processing module, can be replaced by a processor to respectively perform the transceiver operations and related processing operations in each method embodiment.

[0332] In addition, the transceiver module 11 may also be a transceiver circuit (for example, may include a receiving circuit and a sending circuit), and the processing module may be a processing circuit.

[0333] Figure 15 is a schematic diagram of another communication device 20 provided in an embodiment of the present application. Device 20 includes a processor 21, which is configured to execute computer programs or instructions stored in memory 22, or read data / signaling stored in memory 22, to perform the methods described in the above method embodiments. Optionally, there may be one or more processors 21.

[0334] Optionally, as shown in FIG15 , the device 20 further includes a memory 22 for storing computer programs or instructions and / or data. The memory 22 may be integrated with the processor 21 or may be separately provided. Optionally, there may be one or more memories 22.

[0335] Optionally, as shown in Figure 15, the device 20 further includes a transceiver 23, which is used to receive and / or send signals. For example, the processor 21 is used to control the transceiver 23 to receive and / or send signals.

[0336] As a solution, the device 20 is used to implement the operations performed by the first site or the second site in the above various method embodiments.

[0337] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0338] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory and / or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0339] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.

[0340] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0341] 16 is a schematic diagram of a chip system 30 according to an embodiment of the present application. The chip system 30 (or also referred to as a processing system) includes a logic circuit 31 and an input / output interface 32.

[0342] The logic circuit 31 may be a processing circuit in the chip system 30. The logic circuit 31 may be coupled to a storage unit and call instructions in the storage unit so that the chip system 30 can implement the methods and functions of the various embodiments of the present application. The input / output interface 32 may be an input / output circuit in the chip system 30, outputting information processed by the chip system 30 or inputting data or signaling information to be processed into the chip system 30 for processing.

[0343] As a solution, the chip system 30 is used to implement the operations performed by the first site or the second site in the above various method embodiments.

[0344] For example, the logic circuit 31 is used to implement the processing-related operations performed by the first site or the second site in the above method embodiment; the input / output interface 32 is used to implement the sending and / or receiving-related operations performed by the terminal device in the above method embodiment.

[0345] An embodiment of the present application further provides a computer-readable storage medium on which computer instructions for implementing the methods executed by the device in the above-mentioned method embodiments are stored.

[0346] For example, when the computer program is executed by a computer, the computer can implement the method performed by the first site or the second site in each embodiment of the above method.

[0347] An embodiment of the present application further provides a computer program product comprising instructions, which, when executed by a computer, implement the method performed by the first site or the second site in the above-mentioned method embodiments.

[0348] An embodiment of the present application further provides a communication system, including the aforementioned first site and second site.

[0349] The explanation of the relevant contents and beneficial effects of any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, which will not be repeated here.

[0350] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel 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.

[0351] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0352] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0353] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0354] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0355] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0356] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: include: Send a first physical layer protocol data unit PPDU, where the first PPDU includes a first field for beam training, the frequency domain range corresponding to the first field includes a first sub-frequency domain range and a second sub-frequency domain range, the first sub-frequency domain range and the second sub-frequency domain range have a non-overlapping part, and the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the first frequency domain range corresponding to the first PPDU; sending a first beam set within the first sub-frequency domain range of the first field, and sending a second beam set within the second sub-frequency domain range of the first field, Among them, the first beam sent within the first sub-frequency domain at the first moment and the second beam sent within the second sub-frequency domain have different directions, the first beam belongs to the first beam set, and the second beam belongs to the second beam set.

2. The method according to claim 1, characterized in that: A sequence corresponding to the first beam set sent on the subcarriers in the first sub-frequency domain range is a first sequence, and the first sequence is a partial sequence of the sequence corresponding to the first frequency domain range sent on at least one first subcarrier; The sequence corresponding to the second beam set sent on the subcarriers in the second sub-frequency domain range is a second sequence, and the second sequence is a partial sequence of the sequence corresponding to the first frequency domain range sent on at least one second subcarrier.

3. The method according to claim 1, characterized in that A sequence corresponding to the first beam set sent on the subcarriers in the first sub-frequency domain range is a first sequence, and the first sequence is a sequence corresponding to the first sub-frequency domain range; The sequence corresponding to the second beam set sent on the subcarriers in the second sub-frequency domain range is the second sequence, and the second sequence is the sequence corresponding to the second sub-frequency domain range.

4. The method according to any one of claims 1 to 3, characterized in that The method further comprises: Sending first indication information, where the first indication information is used to indicate one or more of the following information: The number of sub-frequency domain ranges corresponding to the first field, the size of the first sub-frequency domain range, or the size of the second sub-frequency domain range.

5. The method according to claim 4, characterized in that The first indication information is further used to indicate that the frequency domain range corresponding to the first field has multiple sub-frequency domain ranges.

6. The method according to any one of claims 1 to 5, characterized in that Sending a first beam set in the first sub-frequency domain range, and sending a second beam set in the second sub-frequency domain range, includes: sending a plurality of beams in the first beam set in a plurality of first time domain ranges within the first sub-frequency domain range respectively, wherein the plurality of beams in the first beam set have different directions; and / or, Multiple beams in the second beam set are respectively sent in multiple second time domain ranges within the second sub-frequency domain range, and the multiple beams in the second beam set have different directions.

7. The method according to claim 6, characterized in that The method further comprises: Sending second indication information, where the second indication information is used to indicate at least one of the following information: The number of the first time domain ranges corresponding to the first sub-frequency domain range, the configuration information of the first time domain range, the length of the training field in the first time domain range, the number of training field symbols in the first time domain range, the number of the second time domain ranges corresponding to the second sub-frequency domain range, the configuration information of the second time domain range, the length of the training field in the second time domain range, and the number of training field symbols in the second time domain range.

8. The method according to any one of claims 1 to 7, characterized in that The method further comprises: receiving a response message, wherein the response message includes an identifier of the third beam and / or location information of the third beam, The position information of the third beam is used to indicate the frequency domain range and time domain range corresponding to the third beam.

9. The method according to claim 8, characterized in that The response message also includes measurement information of the third beam.

10. The method according to claim 8 or 9, characterized in that: The position information of the third beam includes: an identifier of a frequency domain range corresponding to the third beam and an identifier of a time domain range corresponding to the third beam; or, The position identifier corresponding to the third beam is an identifier corresponding to the third beam among multiple position identifiers sequentially identified from front to back in the time domain and from low frequency to high frequency in the frequency domain of the first field.

11. The method according to any one of claims 1 to 10, characterized in that The method further comprises: Send a third indication information, wherein the third indication information is used to instruct the first device to send a second field for beam training, the frequency domain range corresponding to the second field includes a third sub-frequency domain range and a fourth sub-frequency domain range, and the beam sent in the third sub-frequency domain range and the beam sent in the fourth sub-frequency domain range at the second moment have different directions.

12. The method according to any one of claims 1 to 11, characterized in that The method further comprises: Send fourth indication information, wherein the fourth indication information is used to instruct the first device to send a third field for beam training, and to instruct the second device to send a fourth field for beam training, the frequency domain range corresponding to the third field includes a fifth sub-frequency domain range, the frequency domain range corresponding to the fourth field includes a sixth sub-frequency domain range, and the directions of the beam sent in the fifth sub-frequency domain range and the beam sent in the sixth sub-frequency domain range at the third moment are different.

13. The method according to claim 12, characterized in that The sending of the fourth indication information includes: The fourth indication information is sent within a sub-frequency domain range corresponding to a fourth beam, and the first device and the second device are within a preset range of beam directions corresponding to the fourth beam; or, The fourth indication information is sent within the sub-frequency domain range corresponding to the fourth beam and the sub-frequency domain range corresponding to the fifth beam respectively, the first device is within the preset range of the beam direction corresponding to the fourth beam, the second device is within the preset range of the beam direction corresponding to the fifth beam, and the directions of the fourth beam and the fifth beam are different; or The fourth indication information is sent in a frequency domain range outside the first frequency domain range.

14. A communication method, characterized in that: include: Receive a first physical layer protocol data unit PPDU, where the first PPDU includes a first field for beam training, where the frequency domain range corresponding to the first field includes a first sub-frequency domain range and a second sub-frequency domain range, where the first sub-frequency domain range and the second sub-frequency domain range have a non-overlapping part, and where the sum of the first sub-frequency domain range and the second sub-frequency domain range is less than or equal to the first frequency domain range corresponding to the first PPDU; receiving a first set of beams within the first sub-frequency domain range of the first field, and receiving a second set of beams within the second sub-frequency domain range of the first field, Among them, the first beam received in the first sub-frequency domain at the first moment and the second beam received in the second sub-frequency domain have different directions, the first beam belongs to the first beam set, and the second beam belongs to the second beam set.

15. The method according to claim 14, characterized in that A sequence corresponding to the first beam set sent on the subcarriers in the first sub-frequency domain range is a first sequence, and the first sequence is a partial sequence of the sequence corresponding to the first frequency domain range sent on at least one first subcarrier; The sequence corresponding to the second beam set sent on the subcarriers in the second sub-frequency domain range is a second sequence, and the second sequence is a partial sequence of the sequence corresponding to the first frequency domain range sent on at least one second subcarrier.

16. The method according to claim 14, characterized in that A sequence corresponding to the first beam set sent on the subcarriers in the first sub-frequency domain range is a first sequence, and the first sequence is a sequence corresponding to the first sub-frequency domain range; The sequence corresponding to the second beam set sent on the subcarriers in the second sub-frequency domain range is the second sequence, and the second sequence is the sequence corresponding to the second sub-frequency domain range.

17. The method according to any one of claims 14 to 16, characterized in that The method further comprises: Receive first indication information, where the first indication information is used to indicate one or more of the following information: The number of sub-frequency domain ranges corresponding to the first field, the size of the first sub-frequency domain range, or the size of the second sub-frequency domain range.

18. The method according to claim 17, characterized in that The first indication information is further used to indicate that the frequency domain range corresponding to the first field has multiple sub-frequency domain ranges.

19. The method according to any one of claims 14 to 18, characterized in that Receiving a first beam set in the first sub-frequency domain range, and receiving a second beam set in the second sub-frequency domain range, comprising: Receiving multiple beams in the first beam set in multiple first time domain ranges within the first sub-frequency domain range respectively, the multiple beams in the first beam set have different directions; and / or, Multiple second time domain ranges within the second sub-frequency domain range respectively receive multiple beams in the second beam set, and the multiple beams in the second beam set have different directions.

20. The method according to claim 19, characterized in that The method further comprises: Receive second indication information, where the second indication information is used to indicate at least one of the following information: the number of the first time domain ranges corresponding to the first sub-frequency domain range, the configuration information of the first time domain range, the first time domain range The length of the training field in the domain range, the number of training field symbols in the first time domain range, the number of the second time domain ranges corresponding to the second sub-frequency domain range, the configuration information of the second time domain range, the length of the training field in the second time domain range, and the number of training field symbols in the second time domain range.

21. The method according to any one of claims 14 to 20, characterized in that The method further comprises: sending a response message, wherein the response message includes an identifier of the third beam and / or location information of the third beam, The position information of the third beam is used to indicate the frequency domain range and time domain range corresponding to the third beam.

22. The method according to claim 21, characterized in that The response message also includes: measurement information of the third beam.

23. The method according to claim 21 or 22, characterized in that The position information of the third beam includes: an identifier of a frequency domain range corresponding to the third beam and an identifier of a time domain range corresponding to the third beam; or, The position identifier corresponding to the third beam is an identifier corresponding to the third beam among multiple position identifiers sequentially identified from front to back in the time domain and from low frequency to high frequency in the frequency domain of the first field.

24. The method according to any one of claims 14 to 23, characterized in that The method further comprises: Receive third indication information, where the third indication information is used to instruct the first device to send a second field for beam training, where the frequency domain range corresponding to the second field includes a third sub-frequency domain range and a fourth sub-frequency domain range, and where the beam sent in the third sub-frequency domain range and the beam sent in the fourth sub-frequency domain range at the second moment have different directions.

25. A communication device, characterized in that: include: A processor, configured to execute a computer program stored in the memory, so that the apparatus performs the method according to any one of claims 1 to 13.

26. A communication device, characterized in that: include: A processor, configured to execute a computer program stored in the memory, so that the apparatus performs the method according to any one of claims 14 to 24.

27. A communication system, characterized in that: Comprising at least one communication device as claimed in claim 25 and at least one communication device as claimed in claim 26.

28. A chip, characterized in that: include: A processor and an interface, configured to call from a memory and run a computer program stored in the memory to execute the method according to any one of claims 1 to 24.

29. A computer-readable storage medium, characterized in that: Used to store a computer program, the computer program comprising instructions for implementing the method according to any one of claims 1 to 24.

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