Communication method and communication device

Abstract

Provided are a communication method and a communication device, the method comprising: sending a first PPDU, the first PPDU comprising a first field for beam training, a frequency domain range corresponding to the first field comprising a first sub-frequency domain range and a second sub-frequency domain range, the sum of the first sub-frequency domain range and the second sub-frequency domain range is smaller than or equal to the first frequency domain range corresponding to the first PPDU. The first wave beam set is sent in a first sub-frequency domain range of the first field, the second wave beam set is sent in a second sub-frequency domain range of the first field, and the first wave beam sent in the first sub-frequency domain range and the second wave beam sent in the second sub-frequency domain range at the first moment are different in direction. According to the communication method, the field used for beam training in the PPDU corresponds to a plurality of frequency domain ranges, and at least one different beam can be sent in the frequency domain range at the same moment, so that a frequency-division beam training scheme is realized, and the overhead of beam training is reduced.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a communication method and a communication device. Background Art

[0002] With the development of wireless local area network (WLAN), 802.11 is one of the current mainstream wireless access standards. The 802.11 standard includes standards below 7 Gigahertz (GHz): such as 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11bn, etc.; it also includes high-frequency standards (such as 45GHz and above): such as 802.11ad and 802.11ay standards running around 60GHz, and the integrated mmWave standard that may be formed in the future.

[0003] In high-frequency communication, due to the large signal path loss, generally when two devices communicate, at least one device uses directional communication. In the case of directional beam transmission (eg, directional transmission and / or directional reception), beam training can be performed through sector-level sweep (SLS).

[0004] The currently provided beam training technology generally uses a time-division method to perform beam training in the transmission direction or the reception direction during the beam training process. This time-division beam training method has a large resource overhead. Therefore, how to reduce the overhead of beam training has become an urgent problem to be solved. Summary of the invention

[0005] The present application provides a communication method to reduce the overhead of beam training.

[0006] 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 a circuit) of the first site, without limitation.

[0007] The communication method includes: sending a first physical layer protocol data unit PPDU, 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; 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.

[0008] 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 (train 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 a first beam set within the first sub-frequency domain range of the first field, and send a second beam set within the second sub-frequency domain range of the first field. There is at least one moment when 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.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the method also 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.

[0010] Based on the above technical solution, the first site can indicate the number of frequency domain ranges corresponding to the first field carried in the first PPDU through the first indication information, 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. Thus, 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.

[0011] 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 (such as a chip or a circuit) of the first site, without limitation.

[0012] 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.

[0013] 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.

[0014] In combination with the second aspect, in certain implementations of the second aspect, the method also 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 a 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.

[0015] 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.

[0016] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the method also includes: sending 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.

[0017] Based on the above technical solution, the first site can instruct the first device through the third indication information to send a 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.

[0018] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the method also 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.

[0019] 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.

[0020] 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 a 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.

[0021] Based on the above technical solution, the first site can send the above fourth indication information in different ways to improve the flexibility of the solution.

[0022] In a third 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 a circuit) of the first site, without limitation.

[0023] 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 and the beam sent in the fourth sub-frequency domain range at the second moment are different in direction.

[0024] 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.

[0025] In combination with the third aspect, in certain implementations of the third aspect, the method also 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.

[0026] 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.

[0027] In a fourth aspect, a communication method is provided. The method may be executed by the first site, or may be executed by a component (such as a chip or a circuit) of the first site, without limitation.

[0028] 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 and the beam sent in the sixth sub-frequency domain range at the third moment have different directions.

[0029] 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.

[0030] In combination with the fourth aspect, in certain implementations of the fourth aspect, the method also includes: sending 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.

[0031] 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.

[0032] In combination with the third aspect or the fourth aspect, in certain implementations of the third aspect or the fourth aspect, the method also 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.

[0033] 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 sending of beams used for beam training in different sub-frequency domains, realizing frequency division beam training, and reducing 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, 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.

[0035] Based on the above technical solution, the first site can indicate the number of frequency domain ranges corresponding to the first field carried in the first PPDU through the first indication information, 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. Thus, 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.

[0036] 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 subfrequency 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 subfrequency 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.

[0037] Based on the above technical solution, the sequence corresponding to the beam set sent on the subcarriers in the subfrequency 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 in different subfrequency domain ranges can be determined based on the known sequence, thereby reducing the complexity of generating the sequence corresponding to the beam set.

[0038] In combination with the first aspect to the fourth aspect, in certain implementation methods of the first aspect to the fourth aspect, 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.

[0039] 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.

[0040] In combination with the first aspect to the fourth aspect, in certain implementations of the first aspect to the fourth aspect, 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.

[0041] 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.

[0042] 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.

[0043] 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 exists in multiple sub-frequency domain ranges.

[0044] 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, includes: respectively sending multiple beams in the first beam set in multiple first time domain ranges within the first sub-frequency domain range, and the multiple beams in the first beam set have different directions; and / or respectively sending multiple beams in the second beam set 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.

[0045] Based on the above technical solution, the first station can respectively send multiple beams in the first beam set in multiple first time domain ranges within the first sub-frequency domain range, and respectively send multiple beams in the second beam set in multiple second time domain ranges within the second sub-frequency domain range, so as to realize time division transmission of different beams in different sub-frequency domain ranges, and further reduce the overhead of beam training.

[0046] 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.

[0047] 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 time division sending parameters 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.

[0048] 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.

[0049] Based on the above technical solution, the first site can receive a response message, which includes an identifier of the third beam and / or 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 communicate based on the third beam.

[0050] 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.

[0051] 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 used in different identification forms to improve the flexibility of the solution.

[0052] In a fifth aspect, a communication method is provided. The method may be executed by the second site, or may be executed by a component (such as a chip or a circuit) of the second site, without limitation.

[0053] 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 and the second beam received within the second sub-frequency domain range at a first moment have different directions, the first beam belongs to the first beam set, and the second beam belongs to the second beam set.

[0054] In combination with the fifth aspect, in certain implementations of the fifth aspect, the method also includes: receiving first indication information, the first indication information being 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.

[0055] In a sixth aspect, a communication method is provided. The method may be executed by the second site, or may be executed by a component (such as a chip or a circuit) of the second site, without limitation.

[0056] 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.

[0057] In combination with the sixth aspect, in certain implementations of the sixth aspect, the method also 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.

[0058] In a seventh aspect, a communication method is provided. The method may be executed by the second site, or may be executed by a component (such as a chip or a circuit) of the second site, without limitation.

[0059] 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 and the beam sent in the fourth sub-frequency domain range at the second moment have different directions.

[0060] In combination with the seventh aspect, in certain implementations of the seventh aspect, the method also 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.

[0061] 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.

[0062] 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 subfrequency 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 subfrequency 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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 also used to indicate that there are multiple sub-frequency domain ranges in the frequency domain range corresponding to the first field.

[0068] 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, includes: receiving multiple beams in the first beam set in multiple first time domain ranges within the first sub-frequency domain range, respectively, and the multiple beams in the first beam set have different directions; 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 multiple beams in the second beam set have different directions.

[0069] 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.

[0070] 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 a frequency domain range and a time domain range corresponding to the third beam.

[0071] 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 a plurality of position identifiers of the first field that are sequentially identified from front to back in the time domain and from low frequency to high frequency in the frequency domain.

[0072] In combination with the fifth to seventh aspects, in certain implementations of the fifth to seventh aspects, the method also includes: receiving third indication information, the third indication information being used to instruct the first device to send a second field for beam training, the frequency domain range corresponding to the second field including 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.

[0073] 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.

[0074] In an eighth aspect, a communication device is provided, which is used to execute the method provided in the first to fourth aspects. Specifically, the communication device may include a unit and / or module, such as a processing unit and an acquisition unit, for executing the method provided in any one of the above implementations of the first to fourth aspects.

[0075] In one implementation, the transceiver unit may be a transceiver, or an input / output interface; the processing unit may be at least one processor. Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0076] 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.

[0077] Exemplarily, the communication device is the above-mentioned first site or a component of the first site (such as a chip or a circuit), and the communication device includes:

[0078] A transceiver unit is used 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 also used 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.

[0079] 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.

[0080] 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.

[0081] 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, 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.

[0082] Optionally, the transceiver unit is also used to send 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.

[0083] 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.

[0084] Exemplarily, the communication device is the above-mentioned second site or a component (such as a chip or a circuit) of the second site, and the communication device includes:

[0085] A transceiver unit 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 unit is also 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.

[0086] Optionally, the transceiver unit is also 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.

[0087] Optionally, the transceiver unit is also used to receive 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.

[0088] 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, 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.

[0089] Optionally, the transceiver unit is also used to receive second indication information, 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.

[0090] 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.

[0091] In a ninth aspect, the present application provides a processor for executing the methods provided in the above aspects.

[0092] For the operations such as sending and acquiring / receiving involved in the processor, unless otherwise specified, or unless they conflict with their actual function or internal logic in the relevant description, they can be understood as operations such as processor output, reception, input, etc., or as sending and receiving operations performed by the radio frequency circuit and antenna, and this application does not limit this.

[0093] 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 implementations of the first to fourth aspects above.

[0094] In an eleventh aspect, a computer program product comprising instructions is provided. When the computer program product is run on a computer, the computer executes the method provided in any one of the implementations of the first to fourth aspects above.

[0095] In the twelfth aspect, a chip is provided, the chip including a processor and a communication interface, the processor reads instructions stored in a memory through the communication interface, and executes the method provided by any one of the implementation modes of the first to fourth aspects above.

[0096] Optionally, as an implementation method, the chip also includes a memory, in which a computer program or instructions are stored, and the processor is used to execute the computer program or instructions stored in the memory. When the computer program or instructions are executed, the processor is used to execute the method provided in any one of the implementation methods of the first to seventh aspects above.

[0097] In the thirteenth aspect, a communication system is provided, comprising the communication device described in the eighth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0098] Figure 1 It is a schematic diagram of an application scenario applicable to the embodiment of the present application.

[0099] Figure 2 A schematic diagram of the structure of a device provided by the present application is shown.

[0100] Figure 3 This is a schematic diagram of the PPDU format.

[0101] Figure 4 A schematic diagram of the structure of the beacon interval BI is shown.

[0102] Figure 5 It is a schematic diagram of time division beamforming training.

[0103] Figure 6 It is a schematic flow chart of a communication method provided in an embodiment of the present application.

[0104] Figure 7 This is a schematic diagram of a first PPDU provided in an embodiment of the present application.

[0105] Figure 8 (a) and (b) are schematic diagrams of another first PPDU provided in an embodiment of the present application.

[0106] Fig. 9 (a) and (b) are schematic diagrams of the division method of the sub-frequency domain range provided in the embodiment of the present application.

[0107] Fig.10 (a) and (b) are schematic diagrams of the sequences provided in the examples of the present application.

[0108] Fig.11 (a) and (b) are schematic diagrams of beam position information provided in an embodiment of the present application.

[0109] Fig.12 It is a schematic flow chart of a communication method provided in an embodiment of the present application.

[0110] Fig.13 (a) to (d) are schematic diagrams of trigger information provided in an embodiment of the present application.

[0111] Fig.14 It is a schematic block diagram of a communication device provided in an embodiment of the present application.

[0112] Fig.15 It is a schematic diagram of another communication device provided in an embodiment of the present application.

[0113] Fig.16 It is a schematic diagram of a chip system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0114] In order to facilitate understanding of the embodiments of the present application, the following points are first explained.

[0115] First, in this application, "used for indication" may include being used for direct indication and being used for indirect indication. When describing that a certain indication information is used for indicating A, it may include that the indication information directly indicates A or indirectly indicates A, but it does not mean that the indication information must carry A.

[0116] 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, the information to be indicated can be directly 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, the indication of specific information can also be achieved with the help of the arrangement order of each piece of information agreed in advance (for example, stipulated by the protocol), thereby reducing the indication overhead to a certain extent. At the same time, the common parts of each piece of information can also be identified and indicated uniformly to reduce the indication overhead caused by indicating the same information separately.

[0117] 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 inherent 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 interchanged in appropriate circumstances so as to be able to describe the schemes other than the embodiments of the present application. In addition, in the embodiments of the present application, words such as "S610" are only marks made for the convenience of description, and are not used to limit the order of execution steps.

[0118] Third, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0119] Fourth, the "storage" involved in the embodiments of the present application may refer to storage in one or more memories. The one or more memories may be separately set or integrated in an encoder or decoder, a processor, or a communication device. The one or more memories may also be partially separately set and partially integrated in a decoder, a processor, or a communication device. The type of memory may be any form of storage medium, which is not limited by the present application.

[0120] Fifth, in the implementation of this application, "protocol" may refer to a standard protocol in the communication field, for example, it may include the NR protocol and related protocols used in future communication systems, and this application does not limit this.

[0121] Sixth, in the embodiments of the present application, the terms “of”, “corresponding, relevant”, “corresponding” and “associate” 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.

[0122] 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 the same.

[0123] Eighth, the term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0124] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0125] The technical solution provided in the embodiments of the present application can be applied to wireless local area network (WLAN) scenarios, for example, supporting the 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, such as 802.11be next generation, Wi-Fi 8, etc., and can also be applied to ultra wideband (UWB) based Wi-Fi protocols. Band (UWB) wireless personal area network systems, such as the 802.15 series standards, can also be applied to sensing systems, such as the 802.11bf series standards, and can also be applied to the 802.11bn standard or the ultra-high reliability (UHR) standard. Among them, the 802.11n standard is called high throughput (HT), the 802.11ac standard is called very high throughput (VHT) standard, the 802.11ax standard is called high efficiency (HE) standard, and the 802.11be standard is called extremely high throughput (EHT) standard. Among them, 802.11bf includes two major categories of standards: low frequency (e.g., sub7GHz) and high frequency (e.g., 60GHz). The implementation of sub7GHz mainly relies on 802.11ac, 802.11ax, 802.11be and the next generation standards, while the implementation of 60GHz mainly relies on 802.11ad, 802.11ay and the next generation standards. Among them, 802.11ad can also be called directional multi-gigabit (DMG) standard, and 802.11ay can also be called enhanced directional multi-gigabit (EDMG) standard.

[0126] Although the embodiments of the present application are mainly described by deploying a WLAN network, especially a network using the IEEE 802.11 system standard, it is easy for those skilled in the art to understand that the various aspects involved in the embodiments of the present application can be extended to other networks using various standards or protocols, such as a high performance radio local area network (HIPERLAN), a wireless wide area network (WWAN), a wireless personal area network (WPAN), or other networks known now or developed later. Therefore, regardless of the coverage range and wireless access protocol used, the various aspects provided in the embodiments of the present application can be applied to any suitable wireless network.

[0127] 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), worldwide 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.

[0128] The above-mentioned communication system applicable to the present application is only an example for illustration, and the communication system applicable to the present application is not limited to this. A unified description is given here and no further elaboration is given below.

[0129] Figure 1 Schematic diagram of an application scenario applicable to the embodiment of the present application. Figure 1As shown, 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 (non-AP STA), referred to as a non-AP station or STA. 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 also to data communication between APs (for example, data communication between AP1 and AP2), and data communication between non-AP STAs and non-AP STAs (for example, data communication between non-AP STA2 and non-AP STA3).

[0130] Among them, the access point can be a node for terminals (such as mobile phones) to enter the wired (or wireless) network. It is mainly deployed in homes, buildings and parks, with a typical coverage radius of tens to hundreds of meters. Of course, it can also be deployed outdoors. The access point is equivalent to a bridge connecting the wired network and the wireless network. Its main function is to connect various wireless network clients together and then connect the wireless network to the Ethernet.

[0131] 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., which is not limited in the embodiments of the present application. 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.

[0132] A non-AP site may be a wireless communication chip, a wireless sensor or a wireless communication terminal, etc., and may also be referred to as a user, user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a 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 function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted 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, etc., and the embodiments of the present application are not limited to this. A non-AP site may be a device that supports the WLAN format. For example, the non-AP station may 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, and 802.11ay.

[0133] For example, non-AP sites can be mobile phones, tablet computers, set-top boxes, smart TVs, smart wearable devices, vehicle-mounted 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.

[0134] 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 respectively used for sending and receiving packet structures, 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.

[0135] For example, Figure 2 A communication device provided by the present application is shown. Figure 2 The device shown can be an AP or a non-AP site. Among them, the medium access control (MAC) layer processing module, the physical (PHY) layer processing module, the radio frequency / antenna, etc. are used to implement the relevant functions of the above-mentioned transmitter and receiver, such as Figure 2As shown, in addition to the MAC layer processing module, the PHY layer processing module, the RF / antenna, the memory, and the processor, the device may also include a controller and a scheduler.

[0136] It should be understood that Figure 2 This is only 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.

[0137] 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.

[0138] 1. Directional communication: WLAN has gone through many generations of development, including standards below 7GHz: such as 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11bn, etc.; also includes high-frequency standards (standards of 45GHz and above): such as 802.11ad and 802.11ay standards running around 60GHz, and the integrated mmWave standard that may be formed in the future.

[0139] In high-frequency communications, due to the characteristics of large signal path loss, it is generally required that when two devices communicate, at least one device adopts directional communication, that is, the general devices use "directional + directional" or "directional + omnidirectional" communication methods.

[0140] Due to the directivity of millimeter wave communication, beam calibration training in the transmission direction and / or reception direction must be performed first during communication. Traditional beam training methods generally use time division to perform beam training in the transmission direction or reception direction. The following briefly introduces the specific content of the PPDU based on orthogonal frequency division multiplexing (OFDM) technology currently considered for integrated millimeter wave standards.

[0141] 2. Low-frequency physical layer protocol data unit (PPDU): Currently, there are many low-frequency standards for WLAN, such as 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, and 802.11be. Unlike the existing high-frequency standards for WLAN, which all use a single-carrier preamble as the beginning of the PPDU (the data part can be in single-carrier mode or OFDM mode), the evolving WLAN low-frequency PPDU format basically uses OFDM modulation from beginning to end. Figure 3The present invention is a schematic diagram of a low-frequency PPDU format based on an OFDM format. 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), Ultra-High Throughput Signal Field or Extremely High Throughput Signal Field (EHT-SIG), EHT-short training field (EHT-STF), EHT-long training field (EHT-LTF), Data field (Data) and Package Extension field (PE). Among them, one or more of L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, EHT-SIG, EHT-STF, and EHT-LTF may be partial structures in the physical layer header (or preamble part) of the PPDU.

[0142] L-STF, L-LTF, and L-SIG can be understood as traditional preamble fields, which are used to ensure the coexistence of new devices and traditional devices. RL-SIG is used to enhance the reliability of traditional signaling fields.

[0143] U-SIG and EHT-SIG are signaling fields. U-SIG is used to carry some common information, such as information indicating the PPDU version, information indicating uplink / downlink, information indicating the frequency domain bandwidth of the PPDU, puncturing indication information, etc. EHT-SIG includes information indicating resource allocation and information indicating data demodulation, etc.

[0144] It should be noted that Figure 3 The fields in the PPDU in the 802.11be scenario are used as an example. The protection scope of this application is not limited in any way. For example, the PPDU in the low-frequency standard may also include a VHT PPDU in OFDM format in 802.11ac (VHT), and for example, a UHR PPDU in 802.11bn (UHR).

[0145] 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.

[0146] 3. PPDU with increased subcarrier spacing: also called the upclocking version of PPDU. The so-called upclocking means shortening the interval between the 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.

[0147] For example, VHT PPDU can be transmitted at 20, 40, 80, and 160 MHz, with a subcarrier spacing of 312.5 KHz and a symbol period of 3.2 microseconds. Every 20 MHz corresponds to 64 points, and the interval between each point is 0.05 microseconds. When 4x up-clock and 8x up-clock are used, the up-clock version PPDU of 802.11ac is shown in the first two columns of Table 1 below (the subcarrier spacing increases, and the period corresponding to sending the same number of points is shortened).

[0148] 802.11be is shown in the third column of Table 1 (16 times up-clocking), which is similar to 802.11ac, except that the subcarrier spacing in EHT-STF and subsequent fields such as the data field is changed to 78.125KHz, corresponding to 256 points in every 20MHz. (1.25MHz in the third column = 78.125KHz*16).

[0149] Table 1:

[0150]

[0151] 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 upper clock version based on a low-frequency format.

[0152] 4. Sector-level sweep (SLS) stage: Specifically, the SLS stage mainly includes the following four parts:

[0153] The initiator sector sweep (ISS) phase is used to train the directional transmission beam of the initiator. The initiator sends training data in a directional beam with a certain width, and the responder receives the training data quasi-omnidirectionally.

[0154] The responder sector sweep (RSS) phase is used to train the responder's directional transmission beam. The responder sends training data in a directional beam with a certain width, and includes the initiator's best transmission sector information in the previous phase. At this time, the initiator receives the training data quasi-omnidirectionally.

[0155] 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;

[0156] Sector sweep acknowledgment (SSW-ACK) phase: SLS can be performed before the data transfer interval (DTI) without the SSW ACK phase, but SLS during the DTI phase requires the SSW-ACK phase. In the SSW-ACK phase, the responder feeds back a list of sectors sent by the responder sorted by quality.

[0157] It should be understood that the omnidirectional antenna used by the device for omnidirectional transmission or omnidirectional reception is an omnidirectional antenna. The omnidirectional antenna radiates uniformly at 360° in the horizontal direction, that is, it is non-directional, and it has a beam with a certain width in the vertical direction. Generally, the smaller the lobe width, the greater the gain. Omnidirectional antennas have a large coverage range and are generally used in suburban district stations in communication systems. Correspondingly, the directional antenna used by the device for directional transmission or directional reception is a directional antenna, which radiates within a certain angle range in the horizontal direction, that is, it is directional. Like omnidirectional antennas, the smaller the lobe width, the greater the gain. Directional antennas are generally used in communication systems in environments with long communication distances, small coverage ranges, large target density, and high frequency utilization.

[0158] 5. Time-division beam training: In 802.11ad / ay, the time axis is divided into beacon intervals (BIs). Figure 4 As shown, Figure 4 A schematic diagram of the structure of the beacon interval BI is shown. Figure 4As shown in the figure, the beacon interval is divided into beacon header indication (BHI) and data transmission interval (DTI). Among them, BHI includes beacon transmission interval (BTI), association beamforming training (A-BFT) and announcement transmission interval (ATI).

[0159] Specifically, the personal basic service set (PBSS) control point (PCP) or AP will send multiple beacon frames according to the sector number in the BTI for downlink sector scanning; A-BFT is used for STA association and uplink sector scanning; ATI is used for PCP / AP to poll STA for cached data information and allocate resources in the data transmission interval (DTI) to STA. The entire DTI will be divided into several sub-intervals, which will be divided into contention based access period (CBAP) and service period (SP) according to the access form. The latter is for scheduling transmission without contention.

[0160] It should be noted that 802.11ad and ay allow PCP to communicate with STA, and the corresponding behavior of PCP is similar to that of AP. Therefore, if not specified, it can be considered that the content described in this application for AP is also applicable to the design of PCP.

[0161] For ease of understanding, combined Figure 5 The process of high-frequency time-division beamforming training is introduced in detail.

[0162] Figure 5 This is a schematic diagram of time-division beamforming training. Figure 5 The process shown can enable the two devices to complete the beamforming training of their respective transmitting and receiving ends. The high-frequency beamforming training starts from the SLS phase initiated by the initiator (such as Figure 5The purpose of the SLS phase is to enable the two devices to at least use a communication that meets the requirements of high robustness and low rate. Generally speaking, the SLS phase only provides the beamforming training of the transmitting end (I-TXSS or R-TXSS, i.e., transmitsector sweep or responder receive sector sweep).

[0163] After the SLS phase, if the initiator or responder needs it, there may be a BRP (beam refinement protocol) phase. The purpose of the BRP phase is to provide receiver training and beam improvement (or AWV improvement, AWV means antenna weight vector, A vector of weights describing the excitation (amplitude and phase) for each element of an antenna array) at both ends of the transmitter and receiver. The BRP phase includes but is not limited to: beam improvement protocol establishment, multi-sector ID detection, sector combination, beam improvement processing, etc.

[0164] In this way, the two devices can obtain the best transmission beam for communicating with each other. However, it should be noted that SLS generally only completes the training of the transmission beam, but does not complete the training of the direction of the receiving beam of the receiving end. Therefore, it can only guarantee relatively basic communication requirements.

[0165] 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 occurs in the BTI and A-BFT phases, the sector scanning confirmation process in the SLS in the above figure does not exist.

[0166] 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.

[0167] Combination of the above Figure 1 The present invention briefly introduces the scenarios in which the communication method provided in the embodiments of the present application can be applied, as well as the basic concepts that may be involved in the embodiments of the present application. Time-division beam training is introduced 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.

[0168] The present application provides a communication method to reduce the overhead of beam training. Figure 6 This communication method is described in detail.

[0169] 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 Figure 1 The scenario shown is, but not limited to, that scenario.

[0170] 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 may 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.

[0171] 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 site and the second site as an example. The first site involved in the embodiment of the present application may be an access point AP, and the second site may be a non-access point non-AP (such as STA); or, the first site may be an access point STA, and the second site may be a non-access point AP; or, the first site and the second site are access points AP; or, the first site and the second site are non-access points non-AP.

[0172] Figure 6 It is a schematic flow chart of a communication method provided in an embodiment of the present application, comprising the following steps:

[0173] S610, the first site sends a first PPDU to the second site, and correspondingly, the second site receives the first PPDU from the first site.

[0174] 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 ease of description, this embodiment is explained by taking the example of the first site sending the first PPDU to a second site.

[0175] 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 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.

[0176] 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.

[0177] 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.

[0178] The above-mentioned 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, and the time domain range used to carry the beam can be called the first field, for example, the first field can be called 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; or, in other words, the frequency domain range carried by the first field in the frequency domain.

[0179] It should be understood that the first site can send a beam to the second site through the first PPDU to implement beam training. Specifically, the first site 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.

[0180] Exemplarily, the above-mentioned first moment may be any moment within the first field, that is, within the time domain range indicated by the first field, there is a moment at which the beam direction sent within the first sub-frequency domain range and the second sub-frequency domain range is different.

[0181] In this embodiment, the first site can send a first beam set within a first sub-frequency domain of the first field, and send a second beam set within a 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 achieving 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.

[0182] It should be understood that the specific transmission method of the beam set of the first station in different sub-frequency domains is not limited in this embodiment. 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. At this time, 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. The transmission method of the beam is not limited in this embodiment, such as analog beamforming, hybrid beamforming, digital beamforming, etc. for beam transmission.

[0183] In addition, this embodiment does not limit the transmission method of other fields in the first PPDU, such as the preamble code, data field, etc. in the first PPDU can also be sent in a frequency division manner, in order to achieve beam tracking or 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 frequency-divided, or the first field is not frequency-divided, and other fields (such as preamble code, data field) are frequency-divided) are not described in detail.

[0184] For ease of understanding, combined Figure 7 The possible format of the first PPDU sent by the first station in this embodiment is introduced in detail.

[0185] from Figure 7 It can be seen from the figure that the first PPDU includes a preamble and a first field, and the frequency domain range corresponding to the first field includes multiple sub-frequency domain ranges (such as Figure 7 In the example shown in FIG. 1 , each sub-frequency domain range is used to send a beam set. Then, multiple sub-frequency domain ranges correspond to multiple beam sets (e.g., Figure 7 The plurality of beam sets are beam set #1, beam set #2, beam set #3 and beam set #4 shown in the figure, wherein each of the plurality of beam sets includes at least one beam, that is, the first site sends the plurality of beam sets by frequency division within different sub-frequency domains on the first field.

[0186] For example, Figure 7 In addition to the first field, the first PPDU 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 code related fields (such as LTF field, STF field, signaling field, etc.), data field, packet extension field, automatic gain control (Auto Gain Control, AGC) field, etc. This application does not limit the specific format of the PPDU.

[0187] It should be understood that Figure 7 The sub-frequency domain range #1, sub-frequency domain range #2, sub-frequency domain range #3 and sub-frequency domain range #4 are only examples, indicating that the first field can correspond to multiple sub-frequency domain ranges, and are only used as a display of different sub-frequency domain ranges of frequency division. The present application does not limit the number of sub-frequency domain ranges (greater than or equal to 2) separated by frequency in the first frequency range (or bandwidth) corresponding to the first PPDU for sending the above-mentioned beam set.

[0188] From the above, it can be seen that the first site can send beams for beam training to other sites in multiple 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 beam for beam training will be sent in a frequency division manner, the first site can send a relevant indication to the second site whether to use frequency division for beam training:

[0189] 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.

[0190] 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 indicating that beam training is performed using a frequency division method.

[0191] For another example, when the first indication information indicates the sizes of multiple different sub-frequency domain ranges, it is equivalent to the first indication information indicating that the beam training is performed using a frequency division method.

[0192] 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.

[0193] 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.

[0194] To facilitate understanding, possible forms of the first indication information are described below with reference to specific examples.

[0195] 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.

[0196] For example, the first frequency domain range corresponding to the first PPDU is 80MHz. If the first indication information indicates that the size of the sub-frequency domain range is 20MHz, 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.

[0197] 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.

[0198] For example, the first frequency domain range corresponding to the first PPDU is 80MHz. 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 0~20MHz, 20~40MHz, 40~60MHz, and 60~80MHz respectively.

[0199] 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 method.

[0200] For example, the first site and the second site have negotiated in advance a frequency division mode indicated by an 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.

[0201] 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.

[0202] 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 through a bitmap. Each bit represents a minimum frequency domain granularity, and indicates the division of the channel by alternating between 0 and 1. For example, the minimum frequency domain granularity is 20MHz.

[0203] For example, the first frequency domain range corresponding to the first PPDU is 320MHz. If the first indication information is 0000 11110011 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.

[0204] 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 ranges in the preambles corresponding to the respective sub-frequency domain ranges. 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.

[0205] It should be understood that this embodiment mainly involves the first field being used for beam training, but does not limit other functions of the first field. For example, the first field can also be used for frequency-divided information transmission, that is, the first field can have the function of a data field. In this embodiment, other functions of the first field are not described in detail, and the first field is mainly used for beam training.

[0206] 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 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 in the 802.11 standard (such as Figure 8 (a)), HE (as shown in Figure 8 (b)), EHT PPDU (as shown in Figure 3 As shown in FIG. 1 , the first indication information may be located in the PPDU as an example:

[0207] 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 exist in various SIGs of various existing or future PPDUs, with no limitation on the name.

[0208] The first indication information may be combined with various fields / subfields to indicate first field related information.

[0209] Optionally, the first indication information may exist in a common field. Further, the first indication information may exist 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.

[0210] 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.

[0211] In addition, the user-specific field can be used to carry specific configuration information of each sub-frequency domain range, such as time division information, etc. At this time, the original meaning of the user field in the user-specific field can be rewritten, or it can be achieved by adding a special user field.

[0212] In addition, the Padding part in the original SIG (such as EHT-SIG) can be used to complete the indication of the first field related information.

[0213] 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.

[0214] It should be understood that a null data packet (NDP), i.e., a PPDU without data, can also be designed for frequency division beamforming. In this case, the first indication information may be present in the NDP Announcement (NDPA) frame preceding the NDP, or may also be present in the SIG field of the NDP. The first indication information may be carried in combination with the resource unit allocation subfield and / or the user-specific field.

[0215] As a possible implementation method, a first beam set is sent in the first sub-frequency domain range, and a second beam set is sent in the second sub-frequency domain range, including: 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.

[0216] In this implementation, the first site can send beams in the beam set in a time division manner within different sub-frequency domains of the first field.

[0217] Exemplarily, when the first beam set includes multiple beams, the multiple beams can be sent 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 the first beam #1 is sent within a first time domain range #1 within the first sub-frequency domain, the first beam #2 is sent within a first time domain range #2 within the first sub-frequency domain, and the first beam #3 is sent within a first time domain range #3 within the first sub-frequency domain, and the beam directions of the first beam #1, the first beam #2, and the first beam #3 are different.

[0218] It should be noted that in this embodiment, it is sufficient that there is at least one moment in which the beam directions sent in different sub-frequency domains are different, and it is not limited that all beam directions must be different. For example, in this embodiment, the direction of some beams sent on the first field can be the same as the direction of the preamble code; or, for example, in this embodiment, the beam directions sent within a certain sub-frequency range on the first field can all be the same; or, for example, in this embodiment, the beam directions within a certain time period of the first field can all be the same, etc., without limitation.

[0219] 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 a first beam #1 and a 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 and the above-mentioned first beam #1 have the same or different directions.

[0220] For example, the beam directions of the first beam #5 and the first beam #6 transmitted within the first sub-frequency domain at a certain time 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.

[0221] Optionally, the above-mentioned time domain range can be called a beam training unit, and each beam training unit can correspond to a set of beam configurations. A simple set of beam configurations can correspond to one transmission direction or multiple transmission directions, and there is no restriction on whether the same direction is repeated. In general, the division of beam training units is for better time-division training and signaling notification.

[0222] Furthermore, the time domain range may be divided differently in different sub-frequency domain ranges.

[0223] For ease of understanding, the following Fig. 9 (a) and (b) in the figure briefly illustrate the division methods of different sub-frequency domain ranges, and the division methods of time domain ranges within different sub-frequency domain ranges.

[0224] from Fig. 9In (a), it can be seen that the frequency domain range corresponding to the first field is divided into 4 sub-frequency domain ranges (such as Fig. 9 The sub-frequency domain range #1, sub-frequency domain range #2, sub-frequency domain range #3 and sub-frequency domain range #4 shown in (a), and the frequency domain range corresponding to each sub-frequency domain range is the same in size, which is equivalent to the frequency domain range corresponding to the first field being divided into 4 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 transmission unit.

[0225] from Fig. 9 In (b), it can be seen that the frequency domain range corresponding to the first field is divided into three sub-frequency domain ranges (such as Fig. 9 The sub-frequency domain range #1, sub-frequency domain range #2 and sub-frequency domain range #3 shown in (b) are different in size from the sub-frequency domain range #1 and the sub-frequency domain range #2 and the sub-frequency domain range #3, and the number of time domain ranges divided by different sub-frequency domain ranges is different (e.g. Fig. 9 The sub-frequency domain range #1 shown in (b) divides the time domain range into 4, and the sub-frequency domain range #3 divides the time domain range into 5).

[0226] From the above, it can be seen that the first site can send beams for beam training to other sites 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 received subsequently are sent in a time-division manner, the first site can send relevant instructions for beam training using a time-division manner to the second site:

[0227] 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.

[0228] Furthermore, the first site may send information related to the beam ID (eg, 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.

[0229] 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 ranges in the preambles corresponding to the respective sub-frequency domain ranges. 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.

[0230] It should be understood that the signaling information about the first field in this embodiment, including frequency division information, time division information, etc., such as the first indication information and / or the second indication information, can be exchanged in other PPDUs before the first PPDU where the first field is located. For example, there may be a beam training declaration frame, a beam training notification frame, a beam training establishment frame, etc. to inform the configuration information of the first field in advance. It will not be repeated here.

[0231] 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 sub-frequency domain range is the first sequence, and the sequence corresponding to the second beam set sent on the subcarriers in the second sub-frequency domain range is the second sequence. In this embodiment, the determination methods of the first sequence and the second sequence include but are not limited to the following two methods:

[0232] Method 1: Determine the first sequence and the second sequence based on the sequence corresponding to the first frequency domain range.

[0233] 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.

[0234] The position of the at least one first subcarrier is the same as the position of the subcarrier in the first subfrequency domain. 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. 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, and the index of the at least one second subcarrier is the same as the index of the subcarrier in the second subfrequency domain.

[0235] or,

[0236] 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 a first beam set sent on subcarriers in the first sub-frequency domain range; the second sequence is a sequence corresponding to a second beam set sent on subcarriers in the second sub-frequency domain range.

[0237] 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 protection scope of the present 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 protection scope of the present application.

[0238] 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 the constellation point carried by the subcarrier 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 STF and LTF specific to each generation of standards, such as HE-LTF, EHT-STF, etc.

[0239] For ease of understanding, combined Fig.10 In (a), the method is described in detail, and the form of the sequence corresponding to the beam is shown.

[0240] 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 can be divided by Y. The first PPDU with a bandwidth of 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 a bandwidth of 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 corresponding to the beam training sequence S1.

[0241] from Fig.10 As can be seen from (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, wherein the sequence sent by the subcarrier of sub-frequency domain range #1 (such as, Fig.10 The sequence of sub-frequency domain range #1 shown in (a) is the sequence corresponding to the sub-carrier at the same position corresponding to the beam training sequence S1; the sequence sent by the sub-carrier of sub-frequency domain range #2 (such as, Fig.10 The sequence in the sub-frequency domain range #2 shown in (a) is the sequence corresponding to the subcarriers in the same position corresponding to the beam training sequence S1; the sequence sent by the subcarriers in the sub-frequency domain range #3 (such as, Fig.10 The sequence in the sub-frequency domain range #3 shown in (a) is the sequence corresponding to the subcarriers in the same position corresponding to the beam training sequence S1; the sequence sent by the subcarriers in the sub-frequency domain range #4 (such as, Fig.10 The sub-frequency domain range #4 sequence shown in (a) is the sequence corresponding to the subcarriers at the same position corresponding to the beam training sequence S1.

[0242] Method 2: Determine the first sequence and the second sequence based on sequences corresponding to different sub-frequency domain ranges.

[0243] In the case shown in the second mode, 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.

[0244] 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 STF and LTF specific to each generation standard, such as HE-LTF, EHT-STF, etc.

[0245] For ease of understanding, combined Fig.10 (b) in the second embodiment describes in detail the form of the sequence corresponding to the beam. 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 non-frequency-divided beam training sequence S2 already exists for the bandwidth Y.

[0246] from Fig.10 As can be seen in (b), 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, wherein the sequence sent by the subcarrier of sub-frequency domain range #1 (such as, Fig.10 The sequence of sub-frequency domain range #1 shown in (b) is the beam training sequence S2; the sequence sent by the subcarriers of sub-frequency domain range #2 (such as, Fig.10 The sequence of sub-frequency domain range #2 shown in (b) is the beam training sequence S2; the sequence sent by the subcarriers of sub-frequency domain range #3 (such as, Fig.10 The sequence in the sub-frequency domain range #3 shown in (b) is the beam training sequence S2; the sequence sent by the subcarriers in the sub-frequency domain range #4 (such as, Fig.10 The sub-frequency domain range #4 sequence shown in (b) is the beam training sequence S2.

[0247] It should be understood that Fig.10(a) and (b) are merely examples of the forms of sequences corresponding to beams transmitted on different sub-frequency domains in this embodiment, and do not constitute any limitation on the protection scope of the present application. The forms of sequences corresponding to beams transmitted on the pilot in this embodiment may also include other possibilities. For example, different sub-frequency domains correspond to different bandwidths, 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 division beam training sequence S3 of the PPDU with a bandwidth of Y1, the sequence of sub-frequency domain range #2 is the non-frequency division beam training sequence S4 of the PPDU with a bandwidth of Y2, the sequence of sub-frequency domain range #3 is the non-frequency division beam training sequence S5 of the PPDU with a bandwidth of Y3, the sequence of sub-frequency domain range #4 is the non-frequency division beam training sequence S6 of the PPDU with a bandwidth of Y4, and the examples will not be given one by one here.

[0248] Specifically, in this embodiment, the receiving end may feed back beam-related measurement information, such as channel state information, signal-to-noise ratio information, delay information, etc. to the first station. Figure 6 The method flow shown also includes:

[0249] S620, the second site sends a response message to the first site, and correspondingly, the first site receives the response message from the second site.

[0250] Specifically, 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 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, has the ability to receive beams in multiple frequency domain ranges and detect which frequency domain range beam meets the requirements.

[0251] Exemplarily, the third beam is a beam that meets the requirements obtained by the second station through beam training, and can be a beam in the first beam set or the second beam set mentioned above, or can be other beams that meet the requirements. In this embodiment, there is no restriction on how the second station performs beam training to obtain a beam that meets the requirements, and reference can be made to the description of beam training in the current related art, which will not be described in detail here.

[0252] 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 ease of description, the example of the second site reporting the information of a certain beam (such as the third beam) is used for explanation.

[0253] As a possible implementation manner, the second site may display the identification information of the beam in the response message, for example, the response message includes the identification of the third beam.

[0254] 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. Such as (beam identifier 1, measurement information) + (beam identifier 2, measurement information), etc., where the beam identifier may include any one or more of the following information: beam ID, or sector ID, antenna ID, antenna weight vector ID, etc. Information that can be used to identify the beam, which is not limited in this application.

[0255] As another possible implementation manner, the second site may implicitly indicate the third beam by carrying the location information of the third beam in the response message.

[0256] Exemplarily, the position information of the third beam includes:

[0257] 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, where the position identifier is an identifier corresponding to the third beam among multiple position identifiers that are 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.

[0258] For ease of understanding, combined Fig.11 (a) and (b) briefly illustrate the position information of the beam.

[0259] from Fig.11In (a), it can be seen that 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 transmitted in time domain range 1 of sub-frequency domain range #3 is identified as (3,1), the beam position transmitted in time domain range 2 of sub-frequency domain range #3 is identified as (3,2), the beam position transmitted in time domain range 3 of sub-frequency domain range #3 is identified as (3,3), and the beam position transmitted in time domain range 4 of sub-frequency domain range #3 is identified as (3,4). The position of the beam sent in the time domain range 1 of the sub-frequency domain range #4 is marked as (4,1), the position of the beam sent in the time domain range 2 of the sub-frequency domain range #4 is marked as (4,2), and the position of the beam sent in the time domain range 3 of the sub-frequency domain range #4 is marked as (4,3). (4,3), the beam position sent by time domain range 4 of sub-frequency domain range #4 is identified as (4,4), the beam position sent by time domain range 5 of sub-frequency domain range #4 is identified as (4,5), the beam position sent by time domain range 6 of sub-frequency domain range #4 is identified as (4,6), the beam position sent by time domain range 7 of sub-frequency domain range #4 is identified as (4,7), and the beam position sent by time domain range 8 of sub-frequency domain range #4 is identified as (4,8).

[0260] from Fig.11In (a), it can be seen 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 on 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, wherein 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.

[0261] 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.

[0262] Figure 6 In the communication method shown, 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 a first beam set within the first sub-frequency domain range of the first field, and send a second beam set within the second sub-frequency domain range of the first field. There is at least one moment when 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.

[0263] The present application also provides a communication method, whereby a station can trigger other stations to perform beam training in a frequency division manner. Fig.12 This communication method is described in detail.

[0264] Fig.12 It is a schematic flow chart of a communication method provided in an embodiment of the present application, comprising the following steps:

[0265] S1210, generate trigger information.

[0266] Specifically, when determining to trigger at least one device to send a beam for beam training by frequency division, the site generates trigger information, where the trigger information is used to instruct at least one device to send a beam for beam training by frequency division.

[0267] It should be understood that in this embodiment, there is no limitation on the condition 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.

[0268] For example, the trigger information may be carried in a PPDU. Fig.13 (a) and (b) briefly introduce possible forms of trigger information.

[0269] As an example but not 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.

[0270] Exemplarily, the AP scheduling uplink transmission through a trigger frame includes:

[0271] 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 (HETB PPDUs). The trigger frame format is as follows: Fig.13 As shown in (a).

[0272] from Fig.13It can be seen from (a) that the trigger frame contains a common information (Common Info) field and a user information list (User Info List) field, where the common information field contains common information that all STAs need to read, and the ULBandwidth (uplink bandwidth) field indicates the bandwidth of the HE TB PPDU it triggers, a total of two bits, 00 represents 20MHz, 01 represents 40MHz, 10 represents 80MHz, and 11 represents 160MHz or 80+80MHz. Among them, 80+80MHz is the case where two 80MHz are discontinuous. The user information list field is composed of one or more user information fields, and each user information field contains information that each STA needs to read separately. In the user information field, the association identification (Association Identification12, AID12, representing the lower 12 bits of AID) represents the site identifier of a certain STA, and the resource unit allocation subfield (RUAllocation) is used to indicate the specific resource unit (ResourceUnit, RU) location allocated to this STA (STA indicated by AID12). The specific contents of the common information field and the user information field are as follows. Fig.13 As shown in (b).

[0273] 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 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:

[0274] Table 2

[0275]

[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, which 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 a confirmation frame to the STA.

[0278] 802.11be follows the trigger-based transmission of 802.11ax. The trigger frame of 802.11be reuses the trigger frame type and subtype of 802.11ax, and can be received and understood by both HE STA and EHT STA. After design, it can be used to trigger HETB PPDU, EHT TB PPDU, or a combination of HE TB PPDU and EHT TB PPDU. The trigger frame design of 802.11be is not listed here.

[0279] Exemplarily, the trigger information may be present in a common field of a trigger frame or in a user information field of a trigger frame. Information that all users need to know may be placed in a common field, and information that each user needs to know may be focused on a user information field. A sub-frequency domain range or multiple sub-frequency domain ranges corresponding to a certain user may be indicated in conjunction with a resource unit allocation field.

[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 PPDU, and the traditional time-division beam training PPDU can also use this method). This PPDU can be a traditional TB (Trigger based) PPDU, a new type of TB PPDU, or other names without limitation.

[0281] S1220: The site sends trigger information.

[0282] Specifically, the trigger information is used to indicate the frequency division transmission of the beam used for beam training. The trigger information may be a request frame, a trigger frame, and the like.

[0283] As a possible implementation manner, the site 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, the first device can send a beam for beam training in a frequency division manner. For example, the first device sends a third beam set within a third sub-frequency domain of the second field, and sends a fourth beam set within a 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 method of frequency-division transmission of the beam for beam training by the first device can refer to Figure 6 The description related to the frequency division transmission of the beam for beam training by the first station in the communication method shown will not be repeated here.

[0287] As another possible implementation manner, the site may instruct multiple devices to frequency-divide and send 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, the frequency domain range corresponding to the fourth field includes the sixth sub-frequency domain range, and 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 in direction.

[0289] Under this implementation method, the first device and the second device can send beams for beam training 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. The fifth beam sent by the first device in the fifth sub-frequency domain at the third moment and the sixth beam sent by the second device in 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, the method of sending a beam for beam training between the first device and the second device through frequency division can refer to Figure 6 The communication method shown provides a description of the first site frequency-division sending of a beam for beam training. The difference is that in this implementation method, the first device and the second device respectively send beams within different sub-frequency domains to achieve frequency-division sending 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 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,

[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 station sends trigger information to multiple devices without frequency division, and multiple devices send beams for beam training between frequency division, such as Fig.13 As shown in (c). The station sends trigger information within the sub-frequency domain corresponding to the fourth beam, and multiple devices are within the preset range of the beam direction corresponding to the fourth beam, and can receive the trigger information sent by the station in the direction of the fourth beam, and can send beams for beam training in the fifth sub-frequency domain range and the sixth sub-frequency domain range by frequency division.

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

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

[0299] Example 2: The station sends trigger information to multiple devices in frequency division, and multiple devices send beams for beam training in frequency division, such as Fig.13 As shown in (d), the site sends the fourth indication information in 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 in the preset range of the beam direction corresponding to the fourth beam, and the second device is in the preset range of the beam direction corresponding to the fifth beam. The directions of the fourth beam and the fifth beam are different.

[0300] The method of 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 frequencies), and at least one device sends a beam for beam training at a high frequency by frequency division.

[0302] It should be understood that the sequence numbers of the above processes do 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, the devices in the existing network architecture are mainly used as examples for exemplary description, 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 function 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 embodiments of the present application may not depend on other features in some scenarios, or may be combined with other features in some scenarios, without limitation.

[0307] Above, combined Figure 6 and Fig.12 The communication method provided by the embodiment of the present application is described in detail. The above communication method is mainly introduced from the perspective of the first site and the second site. It can be understood that in order to realize the above functions, the first site and the second site include hardware structures and / or software modules corresponding to the execution of each function.

[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 following, combined Figures 14 to 16 The communication device provided in the embodiment of the present application is described in detail. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment, so the contents not described in detail can be referred to the method embodiment above, and some contents will not be repeated for the sake of brevity.

[0310] The embodiment of the present application can divide the functional modules of the transmitting end device or the receiving end device according to the above method example. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated module 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 corresponding to each function.

[0311] Fig.14 1 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 perform data processing, or 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 called 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 site in the above method embodiment, or may be a component (such as a chip) of the first site.

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

[0315] In a 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 also 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.

[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, 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.

[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 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.

[0319] When the device 10 is used to perform Figure 6When the method is performed, the transceiver module 11 can 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 can be used to execute the processing steps in the method.

[0320] When the device 10 is used to perform Fig.12 When the method is performed, 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 (such as a chip) of the second site.

[0323] The device 10 can implement 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 transceiver-related operations of the second site in the above method embodiment, and the processing module 12 can be used to perform 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, 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 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.

[0327] When the device 10 is used to perform Figure 6 When the method is performed, the transceiver module 11 can 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 can be used to execute the processing steps in the method.

[0328] When the device 10 is used to perform Fig.12 When the method is performed, 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.

[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 a memory for executing one or more software or firmware programs, a merged logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art may understand that the device 10 may be specifically a 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 a 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 repeated here.

[0331] The apparatus 10 of each of the above schemes has the function of implementing the corresponding steps performed by the device (such as the first station) in the above method. The function can be implemented by hardware, or by hardware executing the corresponding software implementation. The hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver module can be replaced by a transceiver (for example, the sending 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] Fig.15 2 is a schematic diagram of another communication device 20 provided in an embodiment of the present application. The device 20 includes a processor 21, and the processor 21 is used to execute a computer program or instruction stored in a memory 22, or read data / signaling stored in the memory 22 to execute the method in each method embodiment above. Optionally, there are one or more processors 21.

[0334] Alternatively, if Fig.15 As shown, the device 20 also includes a memory 22, which is used to store computer programs or instructions and / or data. The memory 22 can be integrated with the processor 21, or can also be separately set. Optionally, the memory 22 is one or more.

[0335] Alternatively, if Fig.15 As shown, the device 20 further includes a transceiver 23, and the transceiver 23 is used for receiving and / or sending 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 each of the above 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 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. A general-purpose processor may be a microprocessor or the processor may also be 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] Fig.16 Schematic diagram of a chip system 30 provided in 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] Among them, the logic circuit 31 can be a processing circuit in the chip system 30. The logic circuit 31 can be coupled to the storage unit and call the instructions in the storage unit so that the chip system 30 can implement the methods and functions of each embodiment of the present application. The input / output interface 32 can 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 also 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 also 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 also 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 of ordinary skill 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 to be beyond the scope of this application.

[0351] Those skilled in the art can 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 the present 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 only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, 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 separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[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 can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods 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 is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope 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 transmitted 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 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.

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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