Information transmission method and apparatus

Abstract

Embodiments of the present application are applicable to a wireless local area network system that supports next-generation Wi-Fi protocols such as 802.11be, Wi-Fi 7, EHT, 802.11ad, 802.11ay, or 802.11bf, next-generation 802.11be such as Wi-Fi 8, or next-generation 802.11 series protocols. In the method, a first device indicates a first polarization direction and a second polarization direction to a second device and transmits a PPDU to the second device. The first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU.

Description

Technical Field

[0001] Cross - reference to related applications This application claims priority to Chinese Patent Application No. 202210682248.5, entitled "INFORMATION TRANSMISSION METHOD AND APPARATUS", filed with the China National Intellectual Property Administration on June 15, 2022, and Chinese Patent Application No. 202211364651.X, entitled "INFORMATION TRANSMISSION METHOD AND APPARATUS", filed with the China National Intellectual Property Administration on November 2, 2022, both of which are hereby incorporated by reference in their entirety.

[0002] This application relates to the field of wireless communication technologies, and in particular, to an information transmission method and apparatus.

Background Art

[0003] In sensing measurements, signals have different characteristics in different polarization directions. It is clearly stipulated in Institute of Electrical and Electronics Engineers (IEEE) 802.11ay that the receiver needs to switch the polarization direction for each N / 2 training sub - fields. Similarly, the transmitter also needs to switch the polarization direction for each N / 2 training sub - fields.

[0004] However, in the above receiving / transmitting method, only the sensing results in the co - polarization direction or the cross - polarization direction can be obtained regardless of the receiving method by which the receiver receives the signal.

Summary of the Invention

[0005] This application provides an information transmission method and apparatus for obtaining sensing results in the co - polarization direction and the cross - polarization direction.

Means for Solving the Problems

[0006] According to a first aspect, an information transmission method is provided. The method can be executed by a first device or a chip having the same function as the first device. In the method, the first device transmits first information to a second device. The first information indicates a first polarization direction and a second polarization direction. The first polarization direction is different from the second polarization direction. The first device transmits a physical layer protocol data unit (PPDU) to the second device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU.

[0007] Based on the above solution, the first device and the second device can exchange the polarization direction of second information via the first information. As a result, the first device and the second device can obtain the co-polarization direction sensing result and the cross-polarization direction sensing result of the second information in an appropriate transmission mode and an appropriate reception mode.

[0008] According to a second aspect, an information transmission method is provided. The method can be executed by a first device or a chip having the same function as the first device. In the method, the first device receives first information from a second device. The first information indicates a first polarization direction and a second polarization direction. The first polarization direction is different from the second polarization direction. The first device transmits a PPDU to the second device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU.

[0009] Based on the foregoing solutions, the first device and the second device can exchange the polarization direction of the second information via the first information. As a result, the first device and the second device can obtain the co-polarization direction sensing result and the cross-polarization direction sensing result of the second information in an appropriate transmission mode and an appropriate reception mode.

[0010] In a possible implementation based on the first aspect and the second aspect, the first polarization direction is used by the second device to receive the first field, and the second polarization direction is used by the second device to receive the second field.

[0011] Based on the foregoing solutions, the first device indicates to the second device via the first information the polarization direction in which the second information is received. As a result, the first device can obtain the co-polarization direction sensing result and the cross-polarization direction sensing result regardless of the polarization direction in which the second information is transmitted.

[0012] In a possible implementation based on the first aspect and the second aspect, the first device transmits the first field to the second device in the first polarization direction. The first device transmits the second field to the second device in the second polarization direction.

[0013] Based on the foregoing solutions, the first device can freely select the polarization direction for transmitting the second information, which is very flexible. In this case, the co-polarization direction sensing result and the cross-polarization direction sensing result can be obtained regardless of the polarization direction in which the second device receives the second information.

[0014] In a possible implementation based on the first aspect and the second aspect, the first information is carried by at least one of the following, namely, the sensing measurement setup request, the sensing measurement setup response, the instance request, and the instance response.

[0015] Based on the foregoing solutions, the first information is carried in a sensing measurement setup request, a sensing measurement setup response, an instance request, and an instance response. As a result, the first device and the second device can exchange the first information in a sensing measurement setup process or an instance exchange process to facilitate subsequent PPDU transmissions.

[0016] In a possible implementation based on the first aspect and the second aspect, the first information is carried in the header information of the PPDU.

[0017] Based on the foregoing solutions, the first information is exchanged via the header information of the PPDU. As a result, the polarization direction can be determined when the PPDU is transmitted. The first device may transmit the training field of the PPDU in the corresponding polarization direction, and the second device may receive the training field of the PPDU in the corresponding polarization direction to obtain the sensing results in the co-polarization direction and the sensing results in the cross-polarization direction, which are those of the second information.

[0018] In a possible implementation based on the first aspect and the second aspect, the first polarization direction includes horizontal polarization in the linear polarization mode, and the second polarization direction includes vertical polarization in the linear polarization direction. Alternatively, the first polarization direction includes vertical polarization in the linear polarization mode, and the second polarization direction includes horizontal polarization in the linear polarization direction. Alternatively, the first polarization direction includes left-handed circular polarization in the circular polarization mode, and the second polarization direction includes right-handed circular polarization in the circular polarization mode. Alternatively, the first polarization direction includes right-handed circular polarization in the circular polarization mode, and the second polarization direction includes left-handed circular polarization in the circular polarization mode.

[0019] According to a third aspect, an information transmission method is provided. The method can be executed by a second device or a chip having the same functions as the second device. In the method, the second device receives first information from a first device. The first information indicates a first polarization direction and a second polarization direction. The first polarization direction is different from the second polarization direction. The second device receives a PPDU from the first device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU.

[0020] Based on the foregoing solution, the first device and the second device can exchange the polarization direction of second information via the first information. As a result, the first device and the second device can obtain the co-polarization direction sensing result and the cross-polarization direction sensing result of the second information in an appropriate transmission mode and an appropriate reception mode.

[0021] According to a fourth aspect, an information transmission method is provided. The method can be executed by a second device or a chip having the same functions as the second device. In the method, the second device transmits first information to the first device, and the first information indicates a first polarization direction and a second polarization direction. The first polarization direction is different from the second polarization direction. The second device receives a PPDU from the first device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU.

[0022] Based on the foregoing solution, the first device and the second device can exchange the polarization direction of second information via the first information. As a result, the first device and the second device can obtain the co-polarization direction sensing result and the cross-polarization direction sensing result of the second information in an appropriate transmission mode and an appropriate reception mode.

[0023] In a possible implementation based on the third and fourth aspects, the second device receives the first field from the first device in a first polarization direction. The second device receives the second field from the first device in a second polarization direction.

[0024] Based on the above solutions, the first device indicates to the second device, via the first information, the polarization direction in which the second information is received. As a result, the first device can obtain the co-polarization direction sensing result and the cross-polarization direction sensing result regardless of the polarization direction in which the second information is transmitted.

[0025] In a possible implementation based on the third and fourth aspects, the first polarization direction is used by the first device to transmit the first field, and the second polarization direction is used by the first device to transmit the second field. The second device receives the first field in a third polarization direction. The second device receives the second field in a fourth polarization direction. The first polarization direction is the same as the third polarization direction, and the second polarization direction is different from the fourth polarization direction. Alternatively, the first polarization direction is different from the third polarization direction, and the second polarization direction is the same as the fourth polarization direction.

[0026] Based on the above solutions, the first device can freely select the polarization direction for transmitting the second information, which is very flexible. In this case, the co-polarization direction sensing result and the cross-polarization direction sensing result can be obtained regardless of the polarization direction in which the second device receives the second information.

[0027] In a possible implementation based on the third and fourth aspects, the first information is carried in at least one of the following, namely, the sensing measurement setup request, the sensing measurement setup response, the instance request, and the instance response.

[0028] Based on the foregoing solutions, the first information is carried in the sensing measurement setup request, the sensing measurement setup response, the instance request, and the instance response. As a result, the first device and the second device can exchange the first information in the sensing measurement setup process or the instance exchange process to facilitate subsequent PPDU transmissions.

[0029] In a possible implementation based on the third aspect and the fourth aspect, the first information is carried in the header information of the PPDU.

[0030] Based on the foregoing solutions, the first information is exchanged via the header information of the PPDU. As a result, the polarization direction can be determined when the PPDU is transmitted. The first device may transmit the training field of the PPDU in the corresponding polarization direction, and the second device may receive the training field of the PPDU in the corresponding polarization direction to obtain the co-polarization direction sensing result and the cross-polarization direction sensing result, which are of the second information.

[0031] In a possible implementation based on the third aspect and the fourth aspect, the first polarization direction includes the horizontal polarization of the linear polarization mode, and the second polarization direction includes the vertical polarization of the linear polarization direction. Alternatively, the first polarization direction includes the vertical polarization of the linear polarization mode, and the second polarization direction includes the horizontal polarization of the linear polarization direction. Alternatively, the first polarization direction includes the left-handed circular polarization of the circular polarization mode, and the second polarization direction includes the right-handed circular polarization of the circular polarization mode. Alternatively, the first polarization direction includes the right-handed circular polarization of the circular polarization mode, and the second polarization direction includes the left-handed circular polarization of the circular polarization mode.

[0032] According to a fifth aspect, an information transmission method is provided. The method can be executed by a first device or a chip having the same functions as the first device. In the method, the first device transmits a PPDU to a second device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction in which the first device transmits the first field of the PPDU, and the second polarization direction is the polarization direction in which the first device transmits the second field of the PPDU. The first polarization direction is different from the second polarization direction, and the first polarization direction and the second polarization direction are predefined or preconfigured.

[0033] Based on the foregoing solution, the first device can transmit the PPDU to the second device in the predefined or preconfigured first polarization direction and second polarization direction. As a result, regardless of the polarization direction in which the second device receives the PPDU, the co-polarization direction sensing result and the cross-polarization direction sensing result can be obtained.

[0034] According to a sixth aspect, an information transmission method is provided. The method can be executed by a first device or a chip having the same functions as the first device. In the method, the first device transmits a PPDU, and the PPDU is used for sensing measurement. The polarization direction of the (N / 4)-th field to the N-th field from the first field of the PPDU is the first polarization direction, the polarization direction of the (N / 4 + 1)-th field to the (N / 2)-th field from the PPDU is the second polarization direction, the polarization direction of the (N / 2 + 1)-th field to the (3N / 4)-th field from the PPDU is the first polarization direction, and the polarization direction of the (3N / 4 + 1)-th field to the N-th field from the PPDU is the second polarization direction, where N is an integer greater than or equal to 2. Alternatively, the polarization direction of the n-th field of the PPDU is the first polarization direction, and the polarization direction of the (n + 1)-th field of the PPDU is the second polarization direction, where n is greater than or equal to 1 and less than or equal to N, and N is an integer greater than or equal to 2. The first polarization direction is different from the second polarization direction.

[0035] Based on the foregoing solutions, the behavior of transmitting a PPDU by the first device may be changed, that is, switching the polarization direction every N / 2 training fields may be changed to switching the polarization direction every N / 4 training fields, or switching the polarization direction for each training field. Therefore, when receiving a PPDU in any manner, the second device may obtain the sensing results in the co-polarization direction and the cross-polarization direction.

[0036] According to a seventh aspect, an information transmission method is provided. The method may be executed by a first device or a chip having the same function as the first device. In the method, the first device transmits a PPDU, and the PPDU is used for sensing measurement. The polarization direction of the first field to the L-th field of the PPDU is the first polarization direction, and the polarization direction of the (L + 1)-th field to the (2L)-th field of the PPDU is the second polarization direction, where L is an integer greater than or equal to 1. The first polarization direction is different from the second polarization direction.

[0037] In a possible implementation based on the fifth aspect, the sixth aspect, and the seventh aspect, the first polarization direction includes horizontal polarization in the linear polarization mode, and the second polarization direction includes vertical polarization in the linear polarization direction. Alternatively, the first polarization direction includes vertical polarization in the linear polarization mode, and the second polarization direction includes horizontal polarization in the linear polarization direction. Alternatively, the first polarization direction includes left-handed circular polarization in the circular polarization mode, and the second polarization direction includes right-handed circular polarization in the circular polarization mode. Alternatively, the first polarization direction includes right-handed circular polarization in the circular polarization mode, and the second polarization direction includes left-handed circular polarization in the circular polarization mode.

[0038] According to an eighth aspect, an information transmission method is provided. The method can be executed by a second device or a chip having the same function as the second device. In the method, the second device receives a PPDU from a first device in a third polarization direction, and the PPDU is used for sensing measurement. The third polarization direction is the polarization direction in which the second device receives the first field of the PPDU, and the fourth polarization direction is the polarization direction in which the second device receives the second field of the PPDU. The third polarization direction is different from the fourth polarization direction, and the third polarization direction and the fourth polarization direction are predefined or preconfigured.

[0039] Based on the foregoing solution, the second device can receive the PPDU from the first device in the predefined or preconfigured third and fourth polarization directions. As a result, regardless of the polarization direction in which the first device transmits the PPDU, the co-polarization direction sensing result and the cross-polarization direction sensing result can be obtained.

[0040] According to a ninth aspect, an information transmission method is provided. The method can be executed by a second device or a chip having the same function as the second device. In the method, the second device receives a PPDU, and the PPDU is used for sensing measurement. The polarization direction of the fields from the (N / 4)-th field to the (N / 2)-th field in the first field of the PPDU is the third polarization direction, the polarization direction of the fields from the (N / 4 + 1)-th field to the (N / 2)-th field is the fourth polarization direction, the polarization direction of the fields from the (N / 2 + 1)-th field to the (3N / 4)-th field of the PPDU is the third polarization direction, and the polarization direction of the fields from the (3N / 4 + 1)-th field to the N-th field of the PPDU is the fourth polarization direction, where N is an integer greater than or equal to 1. Alternatively, the polarization direction of the n-th field of the PPDU is the third polarization direction, and the polarization direction of the (n + 1)-th field of the PPDU is the fourth polarization direction, where n is greater than or equal to 1 and less than or equal to N, and N is an integer greater than or equal to 1. The third polarization direction is different from the fourth polarization direction.

[0041] According to the tenth aspect, an information transmission method is provided. The method can be executed by a second device or a chip having the same function as the second device. In the method, the second device receives a PPDU, and the PPDU is used for sensing measurement. The polarization direction of the first field to the L-th field of the PPDU is the third polarization direction, and the polarization direction of the (L + 1)-th field to the (2L)-th field of the PPDU is the fourth polarization direction, where L is an integer greater than or equal to 1. The third polarization direction is different from the fourth polarization direction.

[0042] Based on the above solution, the behavior of receiving the PPDU by the second device may be changed, that is, switching the polarization direction every N / 2 training fields may be changed to switching the polarization direction every N / 4 training fields, or switching the polarization direction for each training field. Therefore, when the PPDU is transmitted in any manner, the first device can obtain the sensing results in the co-polarization direction and the cross-polarization direction.

[0043] In a possible implementation based on the eighth aspect, the ninth aspect, and the tenth aspect, the third polarization direction includes horizontal polarization in the linear polarization mode, and the fourth polarization direction includes vertical polarization in the linear polarization direction. Alternatively, the third polarization direction includes vertical polarization in the linear polarization mode, and the fourth polarization direction includes horizontal polarization in the linear polarization direction. Alternatively, the third polarization direction includes left-handed circular polarization in the circular polarization mode, and the fourth polarization direction includes right-handed circular polarization in the circular polarization mode. Alternatively, the third polarization direction includes right-handed circular polarization in the circular polarization mode, and the fourth polarization direction includes left-handed circular polarization in the circular polarization mode.

[0044] According to the eleventh aspect, a communication device is provided, including a processing unit and a transceiver unit.

[0045] The processing unit is configured to generate first information. The transceiver unit is configured to transmit the first information to a second device. The first information indicates a first polarization direction and a second polarization direction. The first polarization direction is different from the second polarization direction. The transceiver unit is further configured to transmit a PPDU to the second device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU.

[0046] According to a twelfth aspect, a communication device is provided, including a processing unit and a transceiver unit.

[0047] The transceiver unit is configured to receive the first information from the second device. The first information indicates a first polarization direction and a second polarization direction. The first polarization direction is different from the second polarization direction. The processing unit is configured to generate a PPDU based on the first information. The transceiver unit is further configured to transmit the PPDU to the second device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU.

[0048] In a possible implementation based on the eleventh and twelfth aspects, the first polarization direction is used by the second device to receive the first field, and the second polarization direction is used by the second device to receive the second field.

[0049] In a possible implementation based on the eleventh and twelfth aspects, the transceiver unit is specifically configured to transmit the first field to the second device in the first polarization direction. The transceiver unit is specifically configured to transmit the second field to the second device in the second polarization direction.

[0050] In a possible implementation based on the 11th aspect and the 12th aspect, the first information is carried by at least one of the following, namely, a sensing measurement setup request, a sensing measurement setup response, an instance request, and an instance response.

[0051] In a possible implementation based on the 11th aspect and the 12th aspect, the first information is carried by the header information of the PPDU.

[0052] In a possible implementation based on the 11th aspect and the 12th aspect, the first polarization direction includes horizontal polarization in the linear polarization mode, and the second polarization direction includes vertical polarization in the linear polarization direction. Alternatively, the first polarization direction includes vertical polarization in the linear polarization mode, and the second polarization direction includes horizontal polarization in the linear polarization direction. Alternatively, the first polarization direction includes left-handed circular polarization in the circular polarization mode, and the second polarization direction includes right-handed circular polarization in the circular polarization mode. Alternatively, the first polarization direction includes right-handed circular polarization in the circular polarization mode, and the second polarization direction includes left-handed circular polarization in the circular polarization mode.

[0053] According to the 13th aspect, a communication device is provided, including a processing unit and a transceiver unit.

[0054] The transceiver unit is configured to receive the first information from the first device. The first information indicates a first polarization direction and a second polarization direction. The first polarization direction is different from the second polarization direction. The processing unit is configured to determine the first polarization direction and the second polarization direction. The transceiver unit is further configured to receive a PPDU from the first device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction of the first field of the PPDU, and the second polarization direction is the polarization direction of the second field of the PPDU.

[0055] According to the 14th aspect, a communication device is provided, including a processing unit and a transceiver unit.

[0056] The processing unit is configured to generate first information. The transceiver unit is configured to transmit the first information to a first device, and the first information indicates a first polarization direction and a second polarization direction. The first polarization direction is different from the second polarization direction. The transceiver unit is further configured to receive a PPDU from the first device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU.

[0057] In a possible implementation based on the 13th aspect and the 14th aspect, the transceiver unit is specifically configured to receive a first field from the first device in the first polarization direction. The transceiver unit is specifically configured to receive a second field from the first device in the second polarization direction.

[0058] In a possible implementation based on the 13th aspect and the 14th aspect, the first polarization direction is used by the first device to transmit a first field, and the second polarization direction is used by the first device to transmit a second field. The transceiver unit is specifically configured to receive the first field in a third polarization direction. The transceiver unit is specifically configured to receive the second field in a fourth polarization direction. The first polarization direction is the same as the third polarization direction, and the second polarization direction is different from the fourth polarization direction. Alternatively, the first polarization direction is different from the third polarization direction, and the second polarization direction is the same as the fourth polarization direction.

[0059] In a possible implementation based on the 13th aspect and the 14th aspect, the first information is carried by at least one of the following, namely, a sensing measurement setup request, a sensing measurement setup response, an instance request, and an instance response.

[0060] In a possible implementation based on the 13th aspect and the 14th aspect, the first information is carried by the header information of the PPDU.

[0061] In a possible implementation based on the 13th aspect and the 14th aspect, the first polarization direction includes horizontal polarization in the linear polarization mode, and the second polarization direction includes vertical polarization in the linear polarization direction. Alternatively, the first polarization direction includes vertical polarization in the linear polarization mode, and the second polarization direction includes horizontal polarization in the linear polarization direction. Alternatively, the first polarization direction includes left-handed circular polarization in the circular polarization mode, and the second polarization direction includes right-handed circular polarization in the circular polarization mode. Alternatively, the first polarization direction includes right-handed circular polarization in the circular polarization mode, and the second polarization direction includes left-handed circular polarization in the circular polarization mode.

[0062] According to the 15th aspect, a communication device is provided, which includes a processing unit and a transceiver unit.

[0063] The processing unit is configured to generate a PPDU. The transceiver unit is configured to transmit the PPDU to a second device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction in which the first device transmits the first field of the PPDU, and the second polarization direction is the polarization direction in which the first device transmits the second field of the PPDU. The first polarization direction is different from the second polarization direction, and the first polarization direction and the second polarization direction are predefined or preconfigured.

[0064] According to the 16th aspect, a communication device is provided, which includes a processing unit and a transceiver unit.

[0065] The processing unit is configured to generate a PPDU. The transceiver unit is configured to transmit the PPDU, and the PPDU is used for sensing measurement. The polarization direction of the first field to the (N / 4)-th field of the PPDU is the first polarization direction, the polarization direction of the (N / 4 + 1)-th field to the (N / 2)-th field of the PPDU is the second polarization direction, the polarization direction of the (N / 2 + 1)-th field to the (3N / 4)-th field of the PPDU is the first polarization direction, the polarization direction of the (3N / 4 + 1)-th field to the N-th field of the PPDU is the second polarization direction, and N is an integer greater than or equal to 2. Alternatively, the polarization direction of the n-th field of the PPDU is the first polarization direction, the polarization direction of the (n + 1)-th field of the PPDU is the second polarization direction, n is greater than or equal to 1 and less than or equal to N, and N is an integer greater than or equal to 2. The first polarization direction is different from the second polarization direction.

[0066] According to the 17th aspect, a communication device is provided, including a processing unit and a transceiver unit.

[0067] The processing unit is configured to generate a PPDU. The transceiver unit is configured to transmit the PPDU, and the PPDU is used for sensing measurement. The polarization direction of the first field to the L-th field of the PPDU is the first polarization direction, the polarization direction of the (L + 1)-th field to the (2L)-th field of the PPDU is the second polarization direction, and L is an integer greater than or equal to 1. The first polarization direction is different from the second polarization direction.

[0068] In a possible implementation based on the 15th aspect, the 16th aspect, and the 17th aspect, the first polarization direction includes horizontal polarization in the linear polarization mode, and the second polarization direction includes vertical polarization in the linear polarization direction. Alternatively, the first polarization direction includes vertical polarization in the linear polarization mode, and the second polarization direction includes horizontal polarization in the linear polarization direction. Alternatively, the first polarization direction includes left-handed circular polarization in the circular polarization mode, and the second polarization direction includes right-handed circular polarization in the circular polarization mode. Alternatively, the first polarization direction includes right-handed circular polarization in the circular polarization mode, and the second polarization direction includes left-handed circular polarization in the circular polarization mode.

[0069] According to the 18th aspect, a communication device is provided, including a processing unit and a transceiver unit.

[0070] The processing unit is configured to determine a third polarization direction and a fourth polarization direction. The transceiver unit is configured to receive a PPDU from a first device in the third polarization direction, and the PPDU is used for sensing measurement. The third polarization direction is the polarization direction in which a second device receives a first field of the PPDU, and the fourth polarization direction is the polarization direction in which the second device receives a second field of the PPDU. The third polarization direction is different from the fourth polarization direction, and the third polarization direction and the fourth polarization direction are predefined or preconfigured.

[0071] According to the 19th aspect, a communication device is provided, including a processing unit and a transceiver unit.

[0072] The processing unit is configured to determine a third polarization direction and a fourth polarization direction. The transceiver unit is configured to receive a PPDU, and the PPDU is used for sensing measurement. The polarization direction of the (N / 4)-th field to the (N / 2)-th field from the first field of the PPDU is the third polarization direction, the polarization direction of the (N / 4 + 1)-th field to the (N / 2)-th field is the fourth polarization direction, the polarization direction of the (N / 2 + 1)-th field to the (3N / 4)-th field of the PPDU is the third polarization direction, and the polarization direction of the (3N / 4 + 1)-th field to the N-th field of the PPDU is the fourth polarization direction, where N is an integer greater than or equal to 1. Alternatively, the polarization direction of the n-th field of the PPDU is the third polarization direction, and the polarization direction of the (n + 1)-th field of the PPDU is the fourth polarization direction, where n is greater than or equal to 1 and less than or equal to N, and N is an integer greater than or equal to 1. The third polarization direction is different from the fourth polarization direction.

[0073] According to the 20th aspect, a communication device is provided, including a processing unit and a transceiver unit.

[0074] The processing unit is configured to determine a third polarization direction and a fourth polarization direction. The transceiver unit is configured to receive a PPDU, and the PPDU is used for sensing measurement. The polarization direction of the first field to the L-th field of the PPDU is the third polarization direction, and the polarization direction of the (L + 1)-th field to the (2L)-th field of the PPDU is the fourth polarization direction, where L is an integer greater than or equal to 1. The third polarization direction is different from the fourth polarization direction.

[0075] In a possible implementation based on the 18th aspect, the 19th aspect, and the 20th aspect, the third polarization direction includes horizontal polarization in the linear polarization mode, and the fourth polarization direction includes vertical polarization in the linear polarization direction. Alternatively, the third polarization direction includes vertical polarization in the linear polarization mode, and the fourth polarization direction includes horizontal polarization in the linear polarization direction. Alternatively, the third polarization direction includes left-handed circular polarization in the circular polarization mode, and the fourth polarization direction includes right-handed circular polarization in the circular polarization mode. Alternatively, the third polarization direction includes right-handed circular polarization in the circular polarization mode, and the fourth polarization direction includes left-handed circular polarization in the circular polarization mode.

[0076] According to the 21st aspect, an embodiment of the present application provides a communication device. The communication device may be any one of the communication devices of the 11th aspect to the 20th aspect in the foregoing embodiments, or a chip disposed in any one of the communication devices of the 11th aspect to the 20th aspect. The communication device includes a communication interface and a processor, and optionally further includes a memory. The memory is configured to store a computer program, instructions, or data. The processor is coupled to the memory and the communication interface. When the processor reads a computer program, instructions, or data, the communication device executes the method executed by the first device or the second device in any one of the method embodiments of the 1st aspect to the 10th aspect.

[0077] It should be understood that the communication interface may be implemented by using an antenna, a feeder, a codec, etc. within the communication device. Alternatively, if the communication device is a chip disposed in a network device or a terminal device, the communication interface may be an input / output interface of the chip, such as input / output pins. The communication device may further include a transceiver configured to perform communication between the communication device and another device. For example, when the communication device is the first device, the other device is the second device, or when the communication device is the second device, the other device is the first device.

[0078] According to the 22nd aspect, the present application provides a communication device including a logic circuit and an input / output interface. The logic circuit is configured to execute a method executed by a first device or a second device. The input / output interface is configured to communicate with another device.

[0079] According to the 23rd aspect, an embodiment of the present application provides a chip system. The chip system includes a processor configured to implement a method executed by a communication device in any one of the 1st aspect to the 10th aspect, and may further include a memory. In a possible implementation form, the chip system further includes a memory configured to store program instructions and / or data. The chip system may include a chip, or may include a chip and another discrete component.

[0080] According to the 24th aspect, an embodiment of the present application provides a communication system. The communication system includes a communication device according to any one of the 11th aspect or the 13th aspect. Alternatively, the communication system includes a communication device according to any one of the 12th aspect or the 14th aspect. Alternatively, the communication system includes a communication device according to any one of the 15th aspect or the 18th aspect. Alternatively, the communication system includes a communication device according to any one of the 16th aspect or the 19th aspect. Alternatively, the communication system includes a communication device according to any one of the 17th aspect or the 20th aspect.

[0081] According to the 25th aspect, the present application provides a computer-readable storage medium. The computer-readable storage medium stores a computer program or instructions. When the computer program or instructions are executed, the method executed by the first device in the foregoing aspect is implemented, or the method executed by the second device in the foregoing aspect is implemented.

[0082] According to the 26th aspect, a computer program product is provided. The computer program product includes computer program code or instructions. When the computer program code or instructions are executed, the method executed by the first device in the foregoing aspect is executed, or the method executed by the second device in the foregoing aspect is executed.

[0083] According to the 27th aspect, a communication device is provided. The communication device includes a unit or module configured to execute the method of the foregoing aspect.

[0084] For the beneficial effects of the 11th aspect to the 27th aspect and the implementation forms of the 11th aspect to the 27th aspect, please refer to the description of the beneficial effects of the method in the 1st aspect to the 10th aspect and the implementation forms of the 1st aspect to the 10th aspect.

Brief Description of the Drawings

[0085]

Figure 1

Figure 2

Figure 3A

Figure 3B

Figure 3C

Figure 3D

Figure 4A

Figure 4B

Figure 5A

Figure 5B

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11A

Figure 11B

Figure 12

Figure 13

Figure 14

Figure 15

DETAILED DESCRIPTION OF THE INVENTION

[0086] To facilitate the understanding of the technical solutions provided in the embodiments of this application, the following describes the technical terms used in the embodiments of this application.

[0087] (1) Sensing measurement, which may also be referred to as wireless sensing, means that a transmitter and a receiver transmit signals for the purpose of discovering a target or determining a target state. Wireless local area network (WLAN) sensing means that a station (STA) having WLAN sensing capabilities uses the received WLAN signals to detect the characteristics of a predicted target in a given environment. For example, the characteristics include one or more of range, speed, angle, movement, presence or proximity, gesture, etc. The target includes one or more of an object, a person, an animal, etc. The environment includes one or more of a room, a house, a vehicle, an enterprise, etc.

[0088] For example, the transmitter may transmit a signal used for sensing measurement to the receiver, and the receiver may measure the signal to obtain a channel estimation result, such as CSI. The receiver may perform sensing based on the CSI. Alternatively, the receiver may transmit the channel estimation result to the transmitter, and the transmitter may perform target sensing or target state sensing based on the channel estimation result. For example, the receiver or the transmitter may process the CSI to determine whether there is a moving object in the environment. For example, it is assumed that there is a moving target in the environment. The movement of the target affects the amplitude, frequency, etc. of the PPDU during a certain period, and the influence is reflected in the CSI during that period. Therefore, the receiver or the transmitter may determine whether there is a moving object in the environment based on the CSI. During sensing, the devices involved in sensing are as follows: Sensing initiator: A device that starts the sensing procedure; Sensing responder: A device that responds to sensing initiated by a sensing initiator and is involved in sensing; Sensing transmitter: A device that transmits a sensing signal, where the sensing signal may be a signal used for sensing measurement, such as a PPDU, and the sensing receiver may measure the sensing signal; and Sensing receiver: A device that receives a sensing signal.

[0089] (2) Polarization means the polarization of an electromagnetic wave, represents the characteristic that the direction of the electric field strength vector at a certain point in space changes with time, and is described by the locus of the endpoints of the electric field strength vector that changes with time. Common polarization modes include linear polarization, circular polarization, elliptical polarization, etc. The linear polarization mode is mainly classified into horizontal polarization and vertical polarization. Specifically, during sensing measurement, when the transmitter transmits an H-polarized signal, the receiver may receive the signal in the H direction and / or the V direction. When the receiver receives the signal in the H direction, the signal is transmitted and received in the co-polarization direction H(transmit)-H(receive). When the receiver receives the signal in the V direction, the signal is transmitted and received in the cross-polarization direction H(transmit)-V(receive).

[0090] (3) The training field, also called the training subfield, is a structure or sequence that is repeated at the end of the PPDU used for sensing measurement at a high frequency. K training subfields form one group, and each group of training subfields contains six Golay complementary pairs. K is an integer greater than or equal to 1.

[0091] Embodiments of the present application are applicable to WLAN scenarios, for example, Institute of Electrical and Electronics Engineers (IEEE) 802.11 system standards, such as 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, or the next generation of 802.11ax, such as 802.11be standard, Wi-Fi 7, or extremely high throughput (EHT), 802.11ad, 802.11ay, 802.11bf, or the next generation of 802.11be, such as Wi-Fi 8 or the next generation standard. Alternatively, embodiments of the present application may be applied to wireless local area network systems such as the internet of things (IoT) network and vehicle-to-vehicle / vehicle-to-infrastructure communication (V2X) network. Of course, embodiments of the present application may be further applicable to other possible communication systems, such as LTE systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication systems, 5G communication systems, and future 6G communication systems.

[0092] The following uses an example where the embodiments of the present application are applicable to a WLAN scenario. It should be understood that WLAN has evolved from the 802.11a / g standard and goes through the currently discussed 802.11n, 802.11ac, 802.11ax, and 802.11be. 802.11n may be referred to as high throughput (HT), 802.11ac may be referred to as very high throughput (VHT), 802.11ax may be referred to as high efficiency (HE) or Wi-Fi 6, 802.11be may be referred to as EHT or Wi-Fi 7, and the standards prior to HT, such as 802.11a / b / g, may collectively be referred to as Non-HT.

[0093] FIG. 1 is a diagram of a WLAN network architecture to which an embodiment of the present application is applicable. In FIG. 1, as an example, a WLAN is shown to include one wireless access point (AP) and two stations (STA). The STA associated with the AP can receive the wireless frames transmitted by the AP and can also transmit wireless frames to the AP. In addition, the embodiments of the present application are also applicable to communication between APs. For example, the APs may communicate with each other via a distributed system (DS). The embodiments of the present application are also applicable to communication between STAs. It should be understood that the number of APs and STAs in FIG. 1 is merely an example. There may be more or fewer APs and STAs.

[0094] An access point may be an access point used by a terminal device (such as a mobile phone) to access a wired (or wireless) network, and is mainly deployed in homes, buildings, and campuses. A typical coverage radius is from dozens of meters to hundreds of meters. Of course, the access point may alternatively be deployed outdoors. An access point corresponds to a bridge that connects a wired network and a wireless network. The main function of an access point is to connect various wireless network clients to each other and then connect the wireless network to Ethernet. Specifically, the access point may be a terminal device (such as a mobile phone) having a Wi-Fi chip or a network device (such as a router). The access point may be a device that supports the 802.11be standard. Alternatively, the access point may be a device that supports multiple wireless local area network (WLAN) standards of the 802.11 family, such as the next-generation standards of 802.11ax, 802.11ac, 802.11ad, 802.11ay, 802.11n, 802.11g, 802.11b, 802.11a, and 802.11be. The access point of the present application may be a HE AP, an extremely high throughput (EHT) AP, or an access point applicable to future generations of Wi-Fi standards.

[0095] The station may be a wireless communication chip, a wireless sensor, a wireless communication terminal, etc., and the station may also be called a user. For example, the station may be a mobile phone supporting Wi-Fi communication function, a tablet computer supporting Wi-Fi communication function, a set-top box supporting Wi-Fi communication function, a smart TV supporting Wi-Fi communication function, a smart wearable device supporting Wi-Fi communication function, an in-vehicle communication device supporting Wi-Fi communication function, or a computer supporting Wi-Fi communication function. Optionally, the station may support the 802.11be standard. Alternatively, the station may support a plurality of wireless local area network (WLAN) standards of the 802.11 family, for example, 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, 802.11a, and the next-generation standard of 802.11be.

[0096] The station in this application may be a HE STA or an extremely high throughput (EHT) STA, or may be a STA applicable to future generations of Wi-Fi standards.

[0097] As an example, the access point and the station may be devices used in the Internet of Vehicles in the Internet of Things (IoT), Internet of Things nodes, sensors, etc., smart cameras, smart remote controllers, smart water meters, smart electricity meters, etc. in a smart home, sensors in a smart city, etc.

[0098] In the embodiments of the present application, the AP and the STA may be an AP and an STA applicable to the IEEE 802.11 system standard. The AP is a device deployed in a wireless communication network and providing a wireless communication function to the STA associated with the AP. The AP may be used as the center of the communication system and is usually a network-side product that supports MAC and PHY in the 802.11 system standard, and may be a communication device such as a base station, a router, a gateway, a repeater, a communication server, a switch, or a bridge. The base station may include various forms of macro base stations, micro base stations, relay stations, etc. In this specification, for the sake of simplicity of description, the above-mentioned devices are collectively referred to as an AP. The STA is usually a terminal product that supports the media access control (MAC) and the physical layer (PHY) of the 802.11 system standard, such as a mobile phone or a notebook computer.

[0099] During sensing, the signal has different characteristics in different polarization directions. The same signal has different characteristics in the H-H mode and the H-V mode. In order to fully utilize the polarization diversity gain, usually, both the information regarding the co-polarization direction (H-H or V-V) and the information regarding the cross-polarization direction (H-V or V-H) need to be acquired.

[0100] In 802.11ay, a polarization switch pattern is introduced and used to determine the line of sight (LOF) path. Currently, the training field in 11ay is described using the parameters shown in Table 1. The parameters shown in Table 1 can be carried in a single carrier (SC) mode PPDU or an orthogonal frequency division multiplexing (OFDM) mode PPDU. For example, the parameters shown in Table 1 can be carried in the enhanced directional multi-gigabit (EDMG) header-A field of an SC mode PPDU or an OFDM mode PPDU. Optionally, the parameters shown in Table 1 may be carried in a control mode PPDU. For example, the parameters shown in Table 1 may be carried in the EDMG-header-A1 field of a control mode PPDU.

[0101]

Table 1A

Table 1B

[0102] From Table 1, it can be found that when the number indicated by the EDMG TRN-unit N is even, the polarization direction of the TRN subfield can be switched once every N / 2 TRN subfields. For ease of explanation, hereinafter the EDMG TRN-unit N is simply described as N. It is assumed that N is equal to 4. The transmitter can switch the polarization direction every N / 2 = 2 TRN subfields. Since N is equal to 4, there are a total of 4 TRN subfields, and it will be understood that the transmission method is HHV or VVHH.

[0103] In 11ay, it is clearly specified that the receiver needs to switch the polarization direction for each of the N / 2 TRN subfields. Similarly, the transmitter also needs to switch the polarization direction for each of the N / 2 TRN subfields. In 11ay, when the sensing results are analyzed according to the existing rules, the following results can be obtained.

[0104]

Table 2

[0105]

Table 3

[0106] As shown in Table 2, according to 11ay, when N = 2, the transmitter transmits signals in the HV transmission mode. Although 11ay specifies that the receiver needs to switch the polarization direction after N / 2 = 1 TRN subfield, it does not specify whether the receiver receives signals in the HV reception mode or the VH reception mode. Table 2 shows the sensing results that can be obtained in the two reception modes. It can be found that only the sensing results in the co-polarization direction (H-H or V-V) or the cross-polarization direction (H-V or V-H) can be obtained regardless of the reception mode in which the receiver receives signals. However, both the sensing results in the co-polarization direction and the cross-polarization direction cannot be obtained.

[0107] Similarly, as shown in Table 3, when the transmitter transmits signals in the VH transmission mode, based on the behavior of the receiver specified in 11ay, both the sensing results in the co-polarization direction and the cross-polarization direction cannot be obtained regardless of the reception mode in which the receiver receives signals.

[0108] Note that the same problem also occurs when N is any other arbitrary even number according to the rules of the receiver in 11ay.

[0109] In consideration of this, one embodiment of the present application provides an information transmission method. In the method, the first device and the second device can obtain the sensing results in the cross-polarization direction and the co-polarization direction by polarization mode switching.

[0110] FIG. 2 is an exemplary flowchart of an information transmission method according to an embodiment of the present application. The method may include the following operations. In the embodiment shown in FIG. 2, the first device may be the AP or STA shown in FIG. 1. Similarly, the second device may also be the AP or STA shown in FIG. 1.

[0111] S201: The first device transmits first information to the second device.

[0112] Correspondingly, the second device receives the first information from the first device.

[0113] The first information may indicate a first polarization direction and a second polarization direction. It will be understood that the first polarization direction is different from the second polarization direction. Alternatively, the first information may indicate a polarization switching pattern. For example, the first information may indicate switching from the first polarization direction to the second polarization direction. Alternatively, the first information may indicate the transmission mode in which the first device transmits the second information.

[0114] If possible, the first polarization direction and the second polarization direction may be two different polarization directions of the linear polarization mode. For example, the first polarization direction may include horizontal polarization of the linear polarization mode, and the second polarization direction may include vertical polarization of the linear polarization mode. In another example, the first polarization direction may include vertical polarization of the linear polarization mode, and the second polarization direction may include horizontal polarization of the linear polarization mode.

[0115] In another possible case, the first polarization direction and the second polarization direction may be two different polarization directions in a circular polarization mode. For example, the first polarization direction may include left-handed circular polarization in the circular polarization mode, and the second polarization direction may include right-handed circular polarization in the circular polarization mode. In another example, the first polarization direction may include right-handed circular polarization in the circular polarization mode, and the second polarization direction may include left-handed circular polarization in the circular polarization mode.

[0116] It will be understood that the first polarization direction and the second polarization direction may alternatively be different polarization directions in another co-polarization mode. This is not specifically limited in this application.

[0117] For the sake of simplicity of explanation, hereinafter, an example in which the first polarization direction and the second polarization direction are two different polarization directions in a linear polarization mode will be used to provide an explanation.

[0118] S202: The first device transmits second information to the second device.

[0119] Correspondingly, the second device receives the second information from the first device.

[0120] The second information may be a PPDU, and the PPDU may be used for sensing measurement. For example, the second information may be one PPDU. In another example, the second information may be a plurality of PPDUs. For example, when N = 2, the second information may include a first PPDU and a second PPDU. In another example, when N = 4, the second information may include PPDU 1, PPDU 2, PPDU 3, and PPDU 4.

[0121] If possible, the first polarization direction may be the polarization direction of the first field of a single PPDU, and the second polarization direction may be the polarization direction of the second field of the PPDU. It will be understood that the first field and the second field may be TRN sub-fields. For example, the first field may be the first TRN sub-field to the (N / 2)-th TRN sub-field, and the second field may be the ((N / 2)+1)-th TRN sub-field to the N-th TRN sub-field. N is an integer greater than or equal to 2. In another example, the first field may be the first TRN sub-field to the L-th TRN sub-field, and the second field may be the (L + 1)-th TRN sub-field to the (2L)-th TRN sub-field. L is an integer greater than or equal to 1.

[0122] In another possible case, the first polarization direction may be the polarization direction of the first PPDU, and the second polarization direction may be the polarization direction of the second PPDU. It will be understood that the number of the first PPDUs is not limited to 1, and the number of the second PPDUs is also not limited to 1. For example, when the transmitter switches the polarization direction every N / 2 PPDUs, the first PPDU may be the first PPDU to the (N / 2)-th PPDU, and the second PPDU may be the ((N / 2)+1)-th PPDU to the N-th PPDU. N is an integer greater than or equal to 2. In another example, the first field may be the first TRN sub-field to the L-th TRN sub-field, and the second field may be the (L + 1)-th TRN sub-field to the (2L)-th TRN sub-field. L is an integer greater than or equal to 1.

[0123] In one possible implementation, the first polarization direction and the second polarization direction can be used by the first device to transmit the second information. For example, the first polarization direction is used by the first device to transmit the first field of one PPDU, and the second polarization direction is used by the first device to transmit the second field of the PPDU. In other words, the first device can transmit the first field of the PPDU in the first polarization direction and transmit the second field of the PPDU in the second polarization direction. In another example, the first polarization direction is used by the first device to transmit the first PPDU, and the second polarization direction is used by the first device to transmit the second PPDU. In other words, the first device can transmit the first PPDU in the first polarization direction and transmit the second PPDU in the second polarization direction.

[0124] Therefore, the first device can freely select the polarization direction to transmit the second information, which is very flexible. In this case, regardless of the polarization direction in which the second device receives the second information, the co-polarization direction sensing result and the cross-polarization direction sensing result can be obtained.

[0125] For example, when N = 2, it is assumed that the first device transmits the TRN subfield in the HV transmission mode. The first device switches the polarization direction every N / 2 TRN subfields. That is, the first device transmits the first TRN subfield in the H polarization direction and the second TRN subfield in the V polarization direction. When the second device receives the TRN subfield in the HH reception mode, that is, when the second device receives the first TRN subfield in the H polarization direction and the second TRN subfield in the H polarization direction, the second device can obtain both the sensing result in the co-polarization direction (H-H) and the sensing result in the cross-polarization direction (V-H). When the second device receives the TRN subfield in the VV reception mode, that is, when the second device receives the first TRN subfield in the V polarization direction and the second TRN subfield in the V polarization direction, the second device can obtain both the sensing result in the co-polarization direction (H-V) and the sensing result in the cross-polarization direction (V-V) as shown in Table 4.

[0126] It will be understood that when N = 2, it is assumed that the first device transmits the PPDU in the HV transmission mode. The first device switches the polarization direction every N / 2 PPDUs. That is, the first device transmits the first PPDU in the H polarization direction and the second PPDU in the V polarization direction. When the second device receives the first PPDU in the H polarization direction and the second PPDU in the H polarization direction, the second device can obtain both the sensing result in the co-polarization direction (H-H) and the sensing result in the cross-polarization direction (V-H). When the second device receives the first PPDU in the V polarization direction and the second PPDU in the V polarization direction, the second device can obtain both the sensing result in the cross-polarization direction (H-V) and the sensing result in the co-polarization direction (V-V) as shown in Table 4.

[0127]

Table 4

[0128] Table 4 is described using an example in which the first device transmits the second information in the HV transmission mode when N = 2.

[0129] Similarly, when the first device transmits the second information in the VH transmission mode and the second device receives the second information in the HH reception mode, the second device can also obtain both the sensing result in the co-polarization direction (H-H) and the sensing result in the cross-polarization direction (V-H). When the second device receives the second information in the VV reception mode, the second device can also obtain both the sensing result in the co-polarization direction (V-V) and the sensing result in the cross-polarization direction (H-V), as shown in Table 5.

[0130] [Table 5]

[0131] Tables 4 and 5 show examples of sensing results obtained when N = 2. When N is an integer of 2 or more, the first device indicates the polarization direction in which the second information is transmitted via the first information, and the second device selects the polarization direction in which the second information is received based on the first information. As a result, it will be understood that the sensing results in the co-polarization direction and the cross-polarization direction can also be obtained.

[0132] In the foregoing embodiments, the first device switches the polarization direction for each N / 2 TRN sub-fields. Hereinafter, an example in which the first device switches the polarization direction for each L TRN sub-fields will be used to provide an explanation. For example, when L = 1 and 2L = 2, it is assumed that the first device transmits the TRN sub-fields in the HV transmission mode. When the second device receives the TRN sub-fields in the HH reception mode, that is, when the second device receives the first TRN sub-field in the H polarization direction and the second TRN sub-field in the H polarization direction, the second device can obtain both the sensing result in the co-polarization direction (H-H) and the sensing result in the cross-polarization direction (V-H). When the second device receives the TRN sub-fields in the VV reception mode, that is, when the second device receives the first TRN sub-field in the V polarization direction and the second TRN sub-field in the V polarization direction, the second device can obtain both the sensing result in the cross-polarization direction (H-V) and the sensing result in the co-polarization direction (V-V).

[0133] From the foregoing example, it can be found that when the first device switches the polarization direction for each L TRN sub-fields, the sensing results in the co-polarization direction and the sensing results in the cross-polarization direction can also be obtained.

[0134] In another possible implementation, the first polarization direction and the second polarization direction are used for the second device to receive the second information. For example, the first polarization direction is used for the second device to receive the first field of one PPDU, and the second polarization direction is used for the second device to receive the second field of the PPDU. In another example, the first polarization direction is used for the second device to receive the first PPDU, and the second polarization direction is used for the second device to receive the second PPDU.

[0135] Therefore, regardless of the polarization direction in which the first device transmits the second information, the sensing results in the co-polarization direction and the sensing results in the cross-polarization direction can be obtained.

[0136] For example, when N = 2, it is assumed that the first device instructs the second device to receive the TRN subfield in the HV reception mode. The second device switches the polarization direction for every N / 2 TRN subfields, that is, the second device receives the first TRN subfield in the H polarization direction and the second TRN subfield in the V polarization direction. When the first device transmits the TRN subfield in the HH transmission mode, that is, when the first device transmits the first TRN subfield in the H polarization direction and the second TRN subfield in the H polarization direction, both the sensing result in the co-polarization direction (H-H) and the sensing result in the cross-polarization direction (H-V) can be obtained. When the first device transmits the TRN subfield in the VV transmission mode, that is, when the first device transmits the first TRN subfield in the V polarization direction and the second TRN subfield in the V polarization direction, as shown in Table 6, both the sensing result in the cross-polarization direction (V-H) and the sensing result in the co-polarization direction (V-V) can be obtained.

[0137] It will be understood that when N = 2, it is assumed that the first device instructs the second device to receive the PPDU in the HV reception mode. The second device switches the polarization direction for every N / 2 PPDUs, that is, the second device receives the first PPDU in the H polarization direction and the second PPDU in the V polarization direction. When the first device transmits the PPDU in the HH transmission mode, that is, when the first device transmits the first PPDU in the H polarization direction and the second PPDU in the H polarization direction, both the sensing result in the co-polarization direction (H-H) and the sensing result in the cross-polarization direction (H-V) can be obtained. When the first device transmits the PPDU in the VV transmission mode, that is, when the first device transmits the first PPDU in the V polarization direction and the second PPDU in the V polarization direction, as shown in Table 6, both the sensing result in the cross-polarization direction (V-H) and the sensing result in the co-polarization direction (V-V) can be obtained.

[0138]

Table 6

[0139] Table 6 is described using an example where, when N = 2, the second device receives the second information in the HV reception mode.

[0140] Similarly, when the second device transmits the second information in the VH transmission mode and the first device transmits the second information in the HH transmission mode, the first device can also obtain both the sensing result in the co-polarization direction (H-H) and the sensing result in the cross-polarization direction (H-V). When the first device transmits the second information in the VV transmission mode, the first device can also obtain both the sensing result in the co-polarization direction (V-V) and the sensing result in the cross-polarization direction (V-H) as shown in Table 7.

[0141]

Table 7

[0142] Tables 6 and 7 show examples of the sensing results obtained when N = 2. When N is an integer greater than or equal to 2, the first device indicates, via the first information, the polarization direction in which the second information is transmitted. As a result, it will be understood that the sensing results in the co-polarization direction and the cross-polarization direction can be obtained regardless of the polarization direction in which the second device receives the second information.

[0143] The above shows an example where the second device switches the polarization direction for every N / 2 TRN sub-fields. The following is described using an example where the second device switches the polarization direction for every L TRN sub-fields. For example, L = 1 and 2L = 2. The first device is shown to receive the TRN sub-fields from the second device in the HV reception mode, that is, it is assumed that the second device receives the first TRN sub-field in the H polarization direction and the second TRN sub-field in the V polarization direction. When the first device transmits the TRN sub-fields in the HH transmission mode, that is, when the first device transmits the first TRN sub-field in the H polarization direction and the second TRN sub-field in the H polarization direction, both the co-polarization direction (H-H) sensing result and the cross-polarization direction (H-V) sensing result can be obtained. When the first device transmits the TRN sub-fields in the VV transmission mode, that is, when the first device transmits the first TRN sub-field in the V polarization direction and the second TRN sub-field in the V polarization direction, both the cross-polarization direction (V-H) sensing result and the co-polarization direction (V-V) sensing result can be obtained.

[0144] In one possible implementation, the first device may indicate the first information via a third field, for example, a polarization switch pattern field. It will be understood that the third field may be a field having 1 bit, 2 bits, or more bits. The following provides an explanation using Table 8.

[0145]

Table 8

[0146] From Table 8, when the value of the third field is 0, in the case of L = 1, it can be found that the first polarization direction is H and the second polarization direction is V. Optionally, in the case of L = 1, it can be further shown that the transmission mode of the first device is HV. When N = 2, the first polarization direction is H and the second polarization direction is V. Optionally, in the case of N = 2, it can be further shown that the transmission mode of the first device is HV. When N = 4, the first polarization direction is H and the second polarization direction is V. Optionally, in the case of N = 4, it can be further shown that the transmission mode of the first device is HHV.

[0147] When the value of the third field is 1, in the case of L = 1, the first polarization direction is H and the second polarization direction is V. Optionally, in the case of L = 1, it can be further shown that the transmission mode of the first device is HV. When N = 2, the first polarization direction is V and the second polarization direction is H. Optionally, in the case of N = 2, it can be further shown that the transmission mode of the first device is VH. When N = 4, the first polarization direction is V and the second polarization direction is H. Optionally, in the case of N = 4, it can be further shown that the transmission mode of the first device is VVHH. The rest can be inferred by analogy.

[0148] Note that Table 8 is only used as an example of the third field. When N is an integer greater than or equal to 2, the first polarization direction and the second polarization direction may be alternatively indicated via the third field. Optionally, the third field may further indicate the transmission mode of the first device.

[0149] If possible, the third field, i.e., the first information, may be carried in a sensing measurement set up request or a sensing measurement set up response. For example, to carry the first information, a field may be added to the sensing measurement set up request or the sensing measurement set up response. In another example, the first information may be carried in a current field of the sensing measurement set up request or the sensing measurement set up response. In other words, the current field of the sensing measurement set up request or the sensing measurement set up response may be reused for the first information. In another example, a bit sequence may be added to the current field of the sensing measurement set up request or the sensing measurement set up response to carry the first information.

[0150] For example, in the embodiment shown in FIG. 2, the first device is a sensing initiator and the second device is a sensing responder. In other words, the first device may initiate a sensing procedure to the second device. The first device may send a sensing measurement set up request to the second device, and the second device may send a sensing measurement set up response to the first device. Optionally, the sensing measurement set up request may carry the first information, i.e., the first device may indicate the first polarization direction and the second polarization direction to the second device via the sensing measurement set up request. Optionally, the sensing measurement set up response may also carry the third information, and the third information may include the first indication information, and the first indication information may indicate to agree or confirm in the polarization direction indicated by the first information. If possible, the third information may further include the first information.

[0151] In another example, it is assumed that the second device is the sensing initiator and the first device is the sensing responder. In other words, the second device may initiate a sensing procedure to the first device. The second device may send a sensing measurement setup request to the first device, and the first device may send a sensing measurement setup response to the second device. Optionally, the sensing measurement setup response may carry first information, that is, the first device may indicate the first polarization direction and the second polarization direction to the second device via the sensing measurement setup response. Optionally, the sensing measurement setup request may carry first information. It will be understood that the sensing measurement setup request carrying first information may be understood as the second device requesting the first device to use the first polarization direction and the second polarization direction. When possible, when the sensing measurement setup response carries first information, the first information may indicate to agree or confirm the polarization directions requested by the second device, that is, the first polarization direction and the second polarization direction.

[0152] For example, the sensing measurement setup request may be a DMG sensing measurement setup element. In other words, the first information may be carried within the DMG sensing measurement setup element.

[0153] Figure 3A shows the structure of the DMG sensing measurement setup element. For example, a field may be added to the DMG sensing measurement setup element to carry the first information. It will be understood that the added field may be positioned before or after any field of the DMG sensing measurement setup element. This is not specifically limited in this application. For example, the added field may be positioned between the measurement setup control field and the measurement setup ID field in Figure 3A. In another example, the first information may be positioned between the measurement setup ID field and the report type field in Figure 3A.

[0154] In another example, the first information may be carried in a current field of the DMG sensing measurement setup element. In other words, the current field of the DMG sensing measurement setup element may be reused for the first information, for example, the measurement setup control field may be reused.

[0155] It will be understood that the DMG sensing measurement setup element shown in Figure 3A is only used as a possible implementation of the sensing measurement setup request. The first information referred to in the embodiments of this application may alternatively be carried in the sensing measurement setup request in another sensing scenario. This is not specifically limited in this application.

[0156] In another possible case, the third field, i.e., the first information, may be carried by a DMG sensing beam descriptor element. For example, the first information may be carried by a DMG sensing beam descriptor element included in one or more of a DMG sensing measurement setup request frame, an association request frame, a reassociation request frame, a reassociation response frame, a probe request frame, a probe response frame, a DMG beacon frame, an information request frame, and an information response frame.

[0157] Figure 3B shows the structure of a DMG sensing beam descriptor element. For example, the beam descriptor field of the DMG sensing beam descriptor element may be modified to indicate the first information. In one possible implementation, one or more bits of the beam descriptor field indicate information regarding horizontal polarization / vertical polarization and / or information regarding left-handed circular polarization / right-handed circular polarization and / or information regarding other polarizations. The one or more bits may be bits added to an extended field of the beam descriptor field or the beam descriptor field. Alternatively, existing bits of the beam descriptor field may be modified and reused.

[0158] For example, refer to FIG. 3C. Each beam descriptor field describes information about one beam. In the case of polarization, the beam descriptor field can be information about a horizontally polarized beam or information about a vertically polarized beam. If the beam polarization direction described by the beam descriptor field is horizontal polarization, the HP subfield can be used for the indication. If the beam polarization direction described by the beam descriptor field is vertical polarization, the VP subfield can be used for the indication. If the beam polarization direction described by the beam descriptor field is left-handed circular polarization, the LHCP subfield can be used for the indication. If the beam polarization direction described by the beam descriptor field is right-handed circular polarization, the RHCP subfield can be used for the indication.

[0159] In addition to the polarization method described above, a corresponding polarization information indication method may be further added to the beam descriptor field of the corresponding beam.

[0160] For example, in another implementation, in the DMG sensing beam descriptor element, all beam descriptor fields may be arranged according to a specific rule. In this case, the DMG sensing beam descriptor element includes one piece of indication information indicating the arrangement method of the beam descriptor fields of the DMG sensing beam descriptor element.

[0161] For example, refer to FIG. 3D. The beam descriptor polarization subfield may be added to the TX flag field and is used to describe the arrangement method of subsequent beam descriptor polarizations. The beam descriptor polarization subfield can indicate the arrangement method of subsequent beam descriptors.

[0162] For example, when the beam descriptor polarization subfield is 0, the subsequent beam descriptor fields do not carry polarization information. When the beam descriptor polarization subfield is 1, the subsequent beam descriptor fields with odd indices are horizontally polarized, and the beam descriptor fields with even indices are vertically polarized. The reverse is also true. When the beam descriptor polarization subfield is 1, the subsequent beam descriptor fields with even indices are horizontally polarized, and the beam descriptor fields with odd indices are vertically polarized.

[0163] When the beam descriptor polarization subfield is 2, the subsequent beam descriptor polarization fields with odd indices are left-hand circularly polarized, and the beam descriptor polarization fields with even indices are right-hand circularly polarized. The reverse is also true. When the beam descriptor polarization subfield is 2, the subsequent beam descriptor fields with even indices are left-hand circularly polarized, and the subsequent beam descriptor fields with odd indices are right-hand circularly polarized.

[0164] The beam descriptor polarization subfield being 3 can be an indication of information on another possible polarization scheme.

[0165] During subsequent sensing, the sensing initiator may set the transmit polarization beam and / or the receive polarization beam based on the transmit beam list subelement and the receive beam list subelement of the DMG sensing setup request element.

[0166] In another possible case, a third field, i.e., the first information, may be carried in an instance request or an instance response. Optionally, the instance request may be called a sensing instance request, and the instance response may be called a sensing instance response. For example, a field may be added to the instance request or the instance response to carry the first information. In another example, the first information may be carried in a current field of the instance request or the instance response. In other words, the current field of the instance request or the instance response may be reused for the first information. In another example, a bit sequence may be added to the current field of the instance request or the instance response to carry the first information.

[0167] For example, in the embodiment shown in FIG. 2, the first device is a sensing initiator and the second device is a sensing responder. In other words, the first device may initiate a sensing procedure to the second device. The first device may send an instance request to the second device, and the second device may send an instance response to the first device. Optionally, the instance request may carry the first information, i.e., the first device may indicate the first polarization direction and the second polarization direction to the second device via the instance request. Optionally, the instance response may also carry third information, which may include first indication information, and the first indication information may indicate to agree or confirm with the polarization direction indicated by the first information. If possible, the third information may further include the first information.

[0168] In another example, it is assumed that the second device is a sensing initiator and the first device is a sensing responder. In other words, the second device may initiate a sensing procedure to the first device. The second device may send an instance request to the first device, and the first device may send an instance response to the second device. Optionally, the instance response may carry the first information, that is, the first device may indicate the first polarization direction and the second polarization direction to the second device via the instance response. Optionally, the sensing measurement setup request may carry the first information. It will be understood that an instance request carrying the first information may be understood as a request by the second device for the first device to use the first polarization direction and the second polarization direction. When possible, when the instance response carries the first information, the first information may indicate to agree or confirm the polarization directions requested by the second device, that is, the first polarization direction and the second polarization direction.

[0169] For example, the instance request may be a DMG multistatic sensing request. In other words, the first information may be carried in the DMG multistatic sensing request.

[0170] FIG. 4A shows the format of a time division duplexing (TDD) beamforming information field for DMG multi-static sensing requests. For example, a field may be added to the TDD beamforming information field to carry the first information. It will be understood that the added field may be positioned before or after any field in the format of the TDD beamforming information field. This is not specifically limited in this application. For example, the added field may be positioned between the sensing instance number and the STA multi-static ID in FIG. 4A. In another example, the first information may be positioned between the measurement burst ID and the sensing instance number in FIG. 4A.

[0171] In another example, the first information may be carried in the current field of the TDD beamforming information field. In other words, the current field of the TDD beamforming information field may be reused for the first information, for example, a reserved field may be reused.

[0172] It will be understood that the TDD beamforming information field shown in FIG. 4A is only used as a possible implementation of an instance request. The TDD beamforming information field shown in FIG. 4A is used in an instance request frame for a multi-static sensing scenario. The first information referred to in the embodiments of this application may alternatively be carried in an instance request in another sensing scenario.

[0173] Note that FIG. 4A shows the relevant fields of the instance request frame in a multi-static sensing scenario. In 802.11bf, there are multiple sensing types, such as monostatic sensing, cooperative monostatic sensing, bistatic sensing, cooperative bistatic sensing, and multi-static sensing. It will be understood that in some sensing scenarios, such as monostatic sensing, cooperative monostatic sensing, bistatic sensing, and cooperative bistatic sensing scenarios, the structure of the instance request frame is not clearly defined. Therefore, in these sensing scenarios, the first information can be carried in a frame in which the sensing transmitter and the sensing receiver exchange a sensing instance.

[0174] FIG. 4B shows the format of the BRP sensing element in bistatic sensing. The first information may be carried within the BRP sensing element. For example, a field may be added to the BRP sensing element to carry the first information. It will be understood that the added field may be located before or after any field of the BRP sensing element. This is not specifically limited in this application. For example, the added field may be located between the measurement setup ID and the measurement burst ID in FIG. 4B. In another example, the first information may be carried in a current field of the BRP sensing element. In other words, the current field of the BRP sensing element may be reused for the first information, for example, the sensing instance number may be reused.

[0175] In another possible case, the third field, i.e., the first information, may be carried in the PPDU header information. For example, the first information may be carried in the PPDU header information described above. In another example, the first information may be carried in the header information of the first PPDU or the second PPDU.

[0176] For example, a field may be added to the header information to carry the first information. In another example, the current field of the header information may be reused to carry the first information.

[0177] For example, the first information may be carried in the EDMG-header-A, e.g., in the reserved part of Table 1. It will be understood that the EDMG-header-A in Table 1 is an example of the header information of the SC / OFDM mode SU PPDU in 11ay.

[0178] In another example, in addition to the SC / OFDM mode PPDU, a control mode PPDU further exists in 11ay, and the first information may be carried in the EDMG-header-A2 of the control mode PPDU, e.g., in the reserved bits of the EDMG-header-A2.

[0179] It will be understood that the EDMG header information is only used as a possible implementation form of the PPDU header information, and the first information may alternatively be carried in the PPDU header information in another scenario.

[0180] Based on the foregoing solution, the first device may indicate to the second device via the first information the polarization direction in which the second information was received. In this case, the first device may flexibly select the polarization direction for transmitting the second information, so that regardless of the polarization direction in which the first device transmits the second information, the co-polarization direction sensing result and the cross-polarization direction sensing result can be obtained. Alternatively, the first device may indicate to the second device via the first information the polarization direction in which the second information is transmitted. In this case, regardless of the polarization direction in which the second device receives the second information, the co-polarization direction sensing result and the cross-polarization direction sensing result can be obtained.

[0181] In a possible implementation, the first device and the second device may exchange capability information. For example, the capability information of the first device may include the polarization directions supported by the first device. In other words, the capability information of the first device may include whether the first device supports polarization direction switching. Similarly, for the capability information of the second device, refer to the capability information of the first device.

[0182] If possible, the capability information may be carried by a DMG sensing capability element. FIG. 5A shows the structure of a DMG sensing capability element. For example, a field may be added to the DMG sensing capability element to carry the capability information. In another example, the current field of the DMG sensing capability element may be reused for the first information. In other words, the current field of the DMG sensing capability element may indicate the first information. For example, the DMG sensing capabilities field is reused.

[0183] FIG. 5B shows the structure of the DMG sensing capability field. When the sensing capability field is reused to indicate capability information, reserved bits of the field, such as B46 and B47, may be used. For example, B46 may indicate the supported linear polarization direction, or B46 may indicate whether switching of the linear polarization direction is supported. For example, B47 may indicate the supported circular polarization direction, or B47 may indicate whether switching of the circular polarization direction is supported.

[0184] In another possible implementation, when any one or more of the capability information in the capability information of the first device or the capability information of the second device indicates that polarization direction switching is supported, the first device may send the first information to the second device. In other words, when either the first device or the second device supports polarization direction switching, the first device indicates the first polarization direction and the second polarization direction to the second device via the first information.

[0185] For example, it is assumed that the capability information of the first device includes the polarization directions supported by the first device, that is, the H polarization direction and the V polarization direction. It can be found that the first device supports two different polarization directions, that is, the first device supports linear polarization direction switching. Therefore, the first device may send the first information to the second device, and the first information indicates the H polarization direction and the V polarization direction.

[0186] It will be understood that the capability information of the second device may indicate that polarization direction switching is supported, or may indicate that polarization direction switching is not supported. For example, the capability information of the second device includes the linear polarization direction supported by the second device, that is, the H polarization direction. In other words, the second device does not support linear polarization direction switching. However, the second device may receive the PPDU transmitted by the first device in the H polarization direction, and as a result, the sensing results in the co-polarization direction and the cross-polarization direction may be obtained.

[0187] In another example, it is assumed that the capability information of the second device includes the polarization directions supported by the first device, that is, the H polarization direction and the V polarization direction. It can be found that the second device supports two different polarization directions, that is, the second device supports linear polarization direction switching. Therefore, the first device may transmit the first information to the second device, and the first information indicates the H polarization direction and the V polarization direction.

[0188] It will be understood that the capability information of the first device may indicate that polarization direction switching is supported, or may indicate that polarization direction switching is not supported. For example, the capability information of the first device includes the linear polarization direction supported by the first device, that is, the H polarization direction. In other words, the first device does not support linear polarization direction switching. However, the first device may transmit the PPDU to the second device in the H polarization direction, and as a result, the sensing results in the co-polarization direction and the cross-polarization direction may be obtained.

[0189] Optionally, when the capability information of the first device indicates that the first device does not support polarization direction switching, the first information may indicate that the second device receives the second information in the first polarization direction and the second polarization direction. When the capability information of the second device indicates that the second device does not support polarization direction switching, the first information may indicate the first device to transmit the second information in the first polarization direction and the second polarization direction.

[0190] In the embodiment shown in FIG. 2, the sensing transmitter transmits the first information to the sensing receiver. One embodiment of the present application further provides another information transmission method. In the method, the sensing receiver may transmit the first information to the sensing transmitter. Hereinafter, an explanation will be provided using FIG. 6.

[0191] FIG. 6 is an exemplary flowchart of an information transmission method according to an embodiment of the present application. The method may include the following operations.

[0192] S601: The second device transmits the first information to the first device.

[0193] Correspondingly, the first device receives the first information from the second device.

[0194] Regarding the first information, refer to the first information in the embodiment shown in FIG. 2. For example, the first information may indicate the first polarization direction and the second polarization direction. It will be understood that the first polarization direction is different from the second polarization direction. Alternatively, the first information may indicate a polarization switching pattern. For example, the first information may indicate switching from the first polarization direction to the second polarization direction. Alternatively, the first information may indicate the transmission method by which the first device transmits the second information.

[0195] S602: The first device transmits the second information to the second device.

[0196] Correspondingly, the second device receives second information from the first device.

[0197] Regarding the second information, refer to the second information of the embodiment shown in FIG. 2. For example, the second information may be a PPDU, and the PPDU may be used for sensing measurement. For example, the second information may be one PPDU. In another example, the second information may be a plurality of PPDUs.

[0198] In a possible implementation, the first polarization direction and the second polarization direction can be used by the first device to transmit the second information. For example, the first polarization direction is used by the first device to transmit the first field of one PPDU, and the second polarization direction is used by the first device to transmit the second field of the PPDU. In other words, the first device can transmit the first field of the PPDU in the first polarization direction and transmit the second field of the PPDU in the second polarization direction. In another example, the first polarization direction is used by the first device to transmit the first PPDU, and the second polarization direction is used by the first device to transmit the second PPDU. In other words, the first device can transmit the first PPDU in the first polarization direction and transmit the second PPDU in the second polarization direction.

[0199] Therefore, the first device can transmit the second information in the polarization direction indicated by the second device. In this case, the second device can select the polarization direction in which the second information is received based on the polarization direction indicated by the first information, and as a result, the sensing results in the co-polarization direction and the cross-polarization direction are obtained.

[0200] In another possible implementation, the first polarization direction and the second polarization direction are used for the second device to receive the second information. For example, the first polarization direction is used for the second device to receive the first field of one PPDU, and the second polarization direction is used for the second device to receive the second field of the PPDU. In another example, the first polarization direction is used for the second device to receive the first PPDU, and the second polarization direction is used for the second device to receive the second PPDU.

[0201] In this case, the second device may send to the first device the polarization direction in which the second information is received, and the first device may select the polarization direction in which the second information is sent based on the polarization direction indicated by the first information, and as a result, the sensing results in the co-polarization direction and the cross-polarization direction are obtained.

[0202] For the implementation form that conveys the first information, it will be understood to refer to the embodiment shown in FIG. 2. Details will not be described again in this specification. For example, the first information may be conveyed in a sensing measurement setup request or a sensing measurement setup response. In another example, the first information may be conveyed in an instance request or an instance response. Alternatively, the first information may be conveyed in the header information of the PPDU. For example, the first information may be conveyed in the header information of the aforementioned PPDU. In another example, the first information may be conveyed in the header information of the first PPDU or the second PPDU.

[0203] Based on the foregoing solutions, the second device may indicate to the first device, via the first information, the polarization direction in which the second information is received, and the first device may select, based on the first information, the polarization direction in which the second information is transmitted; or the second device may indicate to the first device, via the first information, the polarization direction in which the second information is transmitted, and the first device may transmit the second information based on the polarization direction indicated by the first information, and as a result, the sensing results in the co-polarization direction and the cross-polarization direction may be obtained.

[0204] In the embodiments shown in FIGS. 2 and 6, the first device and the second device may exchange polarization direction information, and as a result, the sensing results in the co-polarization direction and the cross-polarization direction may be obtained. An embodiment of the present application further provides another information transmission method. In the method, the first device may transmit the second information in a fixed polarization direction. The following provides an explanation using FIG. 7.

[0205] FIG. 7 is an exemplary flowchart of an information transmission method according to an embodiment of the present application. The method may include the following operations.

[0206] S701: The first device determines a first polarization direction and a second polarization direction.

[0207] The first polarization direction is different from the second polarization direction, and the first polarization direction and the second polarization direction are predefined or preconfigured. In other words, the polarization direction, transmission method, or polarization direction switching pattern used when the first device transmits the second information may be predefined or preconfigured. In this way, when receiving the second information, the second device may select the corresponding polarization direction, reception method, or polarization direction switching pattern based on the predefined or preconfigured polarization direction, transmission method, or polarization direction switching pattern.

[0208] S702: The first device transmits the second information to the second device.

[0209] Correspondingly, the second device receives second information from the first device.

[0210] Regarding the second information, it will be understood by referring to the embodiment shown in FIG. 2. For example, the second information may be one PPDU. In another example, the second information may be a plurality of PPDUs.

[0211] If possible, the first polarization direction may be the polarization direction of the first field of one PPDU, and the second polarization direction may be the polarization direction of the second field of the PPDU. It will be understood that the first field and the second field may be TRN sub-fields. For example, the first field may be the first TRN sub-field to the (N / 2)-th TRN sub-field, and the second field may be the ((N / 2)+1)-th TRN sub-field to the N-th TRN sub-field. N is an integer greater than or equal to 2. In another example, the first field may be the first TRN sub-field to the L-th TRN sub-field, and the second field may be the (L + 1)-th TRN sub-field to the (2L)-th TRN sub-field. L is an integer greater than or equal to 1.

[0212] In this way, when receiving a PPDU, the second device may select a third polarization direction and a fourth polarization direction for reception based on a pre-defined or pre-configured first polarization direction and second polarization direction. For example, the second device may select the third polarization direction to receive the first field and select the fourth polarization direction to receive the second field. The third polarization direction may be the same as the first polarization direction, and the fourth polarization direction may be different from the second polarization direction. Alternatively, the third polarization direction may be different from the first polarization direction, and the fourth polarization direction may be the same as the second polarization direction.

[0213] In other words, the second device may select a corresponding receiving method for receiving the aforementioned PPDU based on a pre-defined or pre-configured transmission method, and as a result, the sensing result in the co-polarization direction and the sensing result in the cross-polarization direction are obtained. In other words, the second device may select a corresponding polarization direction switching pattern for receiving the aforementioned PPDU based on a pre-defined or pre-configured polarization direction switching pattern, and as a result, the sensing result in the co-polarization direction and the sensing result in the cross-polarization direction are obtained.

[0214] For example, it is assumed that the second information is one PPDU. When N = 2, it is pre-defined or pre-configured that the first device transmits the second information in the HV transmission method. In other words, the first device transmits the first field of the PPDU in the H polarization direction. For example, the first device transmits the first TRN sub-field of the PPDU in the H polarization direction; the first device transmits the second field of the PPDU in the V polarization direction. For example, the first device transmits the second TRN sub-field of the PPDU in the V polarization direction. In other words, when the first device transmits the PPDU, it switches from the H polarization direction to the V polarization direction.

[0215] In this case, the second device may select the HH receiving method for receiving the second information based on the HV transmission method. In other words, the second device may receive the first field of the PPDU in the H polarization direction. For example, the second device receives the first TRN sub-field of the PPDU in the H polarization direction; the second device receives the second field of the PPDU in the H polarization direction. For example, the second device transmits the second TRN sub-field of the PPDU in the H polarization direction. In other words, when the second device receives one PPDU, it switches from the H polarization direction to the H polarization direction, that is, the polarization direction is not switched. In this way, based on the polarization direction selected by the second device, the sensing result in the co-polarization direction (H-H) and the sensing result in the cross-polarization direction (V-H) may be obtained.

[0216] In another example, it is assumed that the second information is one PPDU. When L = 1 and 2L = 2, it is predefined or preconfigured that the first device transmits the second information in the HV transmission mode. In other words, the first device transmits the first field of the PPDU in the H polarization direction. For example, the first device transmits the first TRN subfield of the PPDU in the H polarization direction; the first device transmits the second field of the PPDU in the V polarization direction. For example, the first device transmits the second TRN subfield of the PPDU in the V polarization direction. In other words, when transmitting the PPDU, the first device switches from the H polarization direction to the V polarization direction.

[0217] In this case, the second device may select an HH reception mode for receiving the second information based on the HV transmission mode. In other words, the second device may receive the first field of the PPDU in the H polarization direction. For example, the second device receives the first TRN subfield of the PPDU in the H polarization direction; the second device receives the second field of the PPDU in the H polarization direction. For example, the second device transmits the second TRN subfield of the PPDU in the H polarization direction. In other words, when receiving one PPDU, the second device switches from the H polarization direction to the H polarization direction, that is, the polarization direction is not switched. In this way, based on the polarization direction selected by the second device, the sensing results in the co-polarization direction (H-H) and the cross-polarization direction (V-H) can be obtained.

[0218] It should be understood that the above has been described by way of example using the HV transmission method. It is predefined or preconfigured that the first device can transmit the second information in the HV transmission method, VH transmission method, HH transmission method, or VV transmission method. Note that the first device can use only one of the four transmission methods, that is, it is predefined or preconfigured that the first device can use only one of the HV transmission method, VH transmission method, HH transmission method, or VV transmission method. Similarly, the above has been described by way of example using the HH reception method. It can be understood that the second device can select a reception method for receiving the second information based on the predefined or preconfigured transmission method of the first device. In this case, the sensing results in the co-polarization direction and the cross-polarization direction can be obtained. Details will not be described below.

[0219] In another example, it is assumed that the second information is one PPDU. When N = 4, it is predefined or preconfigured that the first device transmits the second information in the HHVV transmission method. In other words, the first device transmits the first field of the PPDU in the H polarization direction. For example, the first device transmits the first TRN subfield and the second TRN subfield of the PPDU in the H polarization direction; the first device transmits the second field of the PPDU in the V polarization direction. For example, the first device transmits the third TRN subfield and the fourth TRN subfield of the PPDU in the V polarization direction. In other words, when transmitting the PPDU, the first device switches from the H polarization direction to the V polarization direction.

[0220] In this case, the second device may select an HVHV receiving method for receiving the second information based on the HHVV transmission method. In other words, the second device may receive the first field of the PPDU in the H polarization direction. For example, the second device may receive the first TRN subfield and the third TRN subfield of the PPDU in the H polarization direction; the second device receives the second field of the PPDU in the V polarization direction. For example, the second device transmits the second TRN subfield and the fourth TRN subfield of the PPDU in the H polarization direction. In this way, based on the polarization direction selected by the second device, the sensing results in the co-polarization direction (H-H and V-V) and the sensing results in the cross-polarization direction (V-H and H-V) can be obtained.

[0221] In another example, it is assumed that the second information is one PPDU. When L = 2 and 2L = 4, it is predefined or preconfigured that the first device transmits the second information in the HHVV transmission method. In other words, the first device transmits the first field of the PPDU in the H polarization direction. For example, the first device transmits the first TRN subfield and the second TRN subfield of the PPDU in the H polarization direction; the first device transmits the second field of the PPDU in the V polarization direction. For example, the first device transmits the third TRN subfield and the fourth TRN subfield of the PPDU in the V polarization direction. In other words, when transmitting the PPDU, the first device switches from the H polarization direction to the V polarization direction.

[0222] In this case, the second device may select an HVHV receiving method for receiving the second information based on the HHVV transmission method. In other words, the second device may receive the first field of the PPDU in the H polarization direction. For example, the second device receives the first TRN sub-field and the third TRN sub-field of the PPDU in the H polarization direction; the second device receives the second field of the PPDU in the V polarization direction. For example, the second device transmits the second TRN sub-field and the fourth TRN sub-field of the PPDU in the H polarization direction. In this way, based on the polarization direction selected by the second device, the sensing results in the co-polarization directions (H-H and V-V) and the sensing results in the cross-polarization directions (V-H and H-V) can be obtained.

[0223] In another example, it is assumed that the second information is one PPDU. When L = 1 and 2L = 2, it is predefined or preconfigured that the first device transmits the second information in the HHVV transmission method. In other words, the first device transmits the first field of the PPDU in the H polarization direction. For example, the first device transmits the first TRN sub-field of the PPDU in the H polarization direction; the first device transmits the second field of the PPDU in the V polarization direction. For example, the first device transmits the second TRN sub-field of the PPDU in the V polarization direction; the first device transmits the third field of the PPDU in the H polarization direction. For example, the first device transmits the third TRN sub-field of the PPDU in the H polarization direction; the first device transmits the fourth field of the PPDU in the V polarization direction. For example, the first device transmits the fourth TRN sub-field of the PPDU in the V polarization direction. In other words, when the first device transmits the PPDU, it switches from the H polarization direction to the V polarization direction.

[0224] In this case, the second device may select an HHVV receiving method for receiving the second information based on the HVHV transmission method. In other words, the second device may receive the first field of the PPDU in the H polarization direction. For example, the second device may receive the first and second TRN sub-fields of the PPDU in the H polarization direction; the second device receives the second field of the PPDU in the V polarization direction, and for example, the second device transmits the third and fourth TRN sub-fields of the PPDU in the H polarization direction. In this way, based on the polarization direction selected by the second device, the sensing results in the co-polarization directions (H-H and V-V) and the sensing results in the cross-polarization directions (V-H and H-V) can be obtained.

[0225] It should be understood that the above has been described by way of example using the HHVV transmission method and the HVHV transmission method. It is predefined or preconfigured that the first device can transmit the second information using a plurality of transmission methods. It should be noted that in the above example, it is predefined or preconfigured that the first device can only use one of the plurality of transmission methods. For example, the first device can only use the HHVV transmission method to transmit the second information. Similarly, the above has been described by way of example using the HVHV receiving method. It will be understood that the second device may select a receiving method for receiving the second information based on the predefined or preconfigured transmission method of the first device, and in this case, the sensing results in the co-polarization direction and the sensing results in the cross-polarization direction can be obtained. Details will not be described below.

[0226] In another possible case, the first polarization direction may be the polarization direction of the first PPDU, and the second polarization direction may be the polarization direction of the second PPDU. It should be understood that the number of the first PPDUs is not limited to 1, nor is the number of the second PPDUs limited to 1. For example, when the transmitter switches the polarization direction every N / 2 PPDUs, the first PPDU may be the first PPDU to the (N / 2)-th PPDU, and the second PPDU may be the (N / 2 + 1)-th PPDU to the N-th PPDU.

[0227] In this way, when receiving a plurality of PPDUs, the second device may select a third polarization direction and a fourth polarization direction for reception based on the pre-defined or pre-configured first polarization direction and second polarization direction. For example, the second device may select the third polarization direction to receive the first PPDU and select the fourth polarization direction to receive the second PPDU. The third polarization direction may be the same as the first polarization direction, and the fourth polarization direction may be different from the second polarization direction. Alternatively, the third polarization direction may be different from the first polarization direction, and the fourth polarization direction may be the same as the second polarization direction.

[0228] In other words, the second device may select a corresponding reception method for receiving a plurality of PPDUs based on a pre-defined or pre-configured transmission method, and as a result, the sensing results of the co-polarization direction and the cross-polarization direction are obtained. In other words, the second device may select a corresponding polarization direction switching pattern for receiving a plurality of PPDUs based on a pre-defined or pre-configured polarization direction switching pattern, and as a result, the sensing results of the co-polarization direction and the cross-polarization direction are obtained.

[0229] For example, it is assumed that the second information is a plurality of PPDUs. When N = 2, it is predefined or preconfigured that the first device transmits the second information in the HV transmission mode. In other words, the first device transmits the first PPDU in the H polarization direction and the second PPDU in the V polarization direction. In other words, when transmitting a PPDU, the first device switches from the H polarization direction to the V polarization direction.

[0230] In this case, the second device may select an HH reception mode for receiving the second information based on the HV transmission mode. In other words, the second device may receive the first PPDU in the H polarization direction and the second PPDU in the H polarization direction. In other words, when receiving a plurality of PPDUs, the second device switches from the H polarization direction to the H polarization direction, that is, the polarization direction is not switched. In this way, based on the polarization direction selected by the second device, the sensing results in the co-polarization direction (H-H) and the cross-polarization direction (V-H) can be obtained.

[0231] In another example, it is assumed that the second information is a plurality of PPDUs. When N = 4, it is predefined or preconfigured that the first device transmits the second information in the HHVV transmission mode. In other words, the first device transmits the first PPDU in the H polarization direction, for example, the first and second PPDUs; the first device transmits the second PPDU in the V polarization direction, for example, the third and fourth PPDUs. In other words, when transmitting a PPDU, the first device switches from the H polarization direction to the V polarization direction.

[0232] In this case, the second device may select an HVHV receiving method for receiving the second information based on the HHVV transmission method. In other words, the second device may receive the first PPDUs, for example, the first PPDU and the third PPDU, in the H polarization direction; the second device may receive the second PPDUs, for example, the second PPDU and the fourth PPDU, in the H polarization direction. In this way, based on the polarization direction selected by the second device, the sensing results in the co-polarization directions (H-H and V-V) and the sensing results in the cross-polarization directions (V-H and H-V) can be obtained.

[0233] It should be noted that the above is described using examples of N = 2 and N = 4. When N is an integer greater than or equal to 2, the transmission method by which the first device transmits the second information may also be predefined or preconfigured. When receiving the second information, the second device may select the corresponding receiving method, and as a result, the sensing results in the co-polarization direction and the sensing results in the cross-polarization direction are obtained.

[0234] Based on the technical solution shown in FIG. 7, the method by which the first device transmits the second information may be predefined or preconfigured. As a result, the second device selects a receiving method for receiving the second information to obtain the sensing results in the co-polarization direction and the sensing results in the cross-polarization direction.

[0235] FIG. 8 shows an embodiment in which the transmission method of the first device is specified by a predefined or preconfigured method. An embodiment of the present application further provides another information transmission method. In the method, the receiving method of the second device may be predefined or preconfigured. In other words, the third polarization direction and the fourth polarization direction in which the second device receives the second information may be predefined or preconfigured. In other words, the polarization direction in which the second device receives the second information may be predefined or preconfigured.

[0236] FIG. 8 is an exemplary flowchart of an information transmission method according to an embodiment of the present application. The method may include the following operations. It will be understood that the embodiment shown in FIG. 8 may be implemented separately or in combination with the embodiment shown in FIG. 7. In other words, the receiving method of the second device may be predefined or preconfigured. Alternatively, the transmission method of the first device and the receiving method of the second device may be predefined or preconfigured, so that the second information is received in a receiving method in which the sensing results in the co-polarization direction and the cross-polarization direction are obtained.

[0237] S801: The first device determines a first polarization direction and a second polarization direction.

[0238] S802: The first device transmits second information to the second device.

[0239] Correspondingly, the second device receives the second information from the first device.

[0240] Regarding the second information, it will be understood to refer to the embodiment shown in FIG. 2. For example, the second information may be one PPDU. In another example, the second information may be a plurality of PPDUs.

[0241] In a possible implementation, the second device may determine a third polarization direction and a fourth polarization direction. The third polarization direction is different from the fourth polarization direction, and the third polarization direction and the fourth polarization direction are predefined or preconfigured. In other words, the polarization direction, receiving method, or polarization direction switching pattern used when the second device receives the second information may be predefined or preconfigured. In this way, when transmitting the second information, the first device may select the corresponding polarization direction, transmission method, or polarization direction switching pattern based on the predefined or preconfigured polarization direction, receiving method, or polarization direction switching pattern.

[0242] In a possible implementation form, the third polarization direction may be the polarization direction in which the second device receives the first field of the PPDU, and the fourth polarization direction may be the polarization direction in which the second device receives the second field of the PPDU. It will be understood that the first field and the second field may be TRN sub-fields. For example, the first field may be the first TRN sub-field to the (N / 2)-th TRN sub-field, and the second field may be the (N / 2 + 1)-th TRN sub-field to the N-th TRN sub-field. N is an integer greater than or equal to 2. In another example, the first field may be the first TRN sub-field to the L-th TRN sub-field, and the second field may be the (L + 1)-th TRN sub-field to the (2L)-th TRN sub-field. L is an integer greater than or equal to 1.

[0243] In this way, when the first device transmits a PPDU, it can select the first polarization direction and the second polarization direction for transmission based on the pre-defined or pre-configured third polarization direction and fourth polarization direction. For example, the first device may select the first polarization direction to transmit the first field and select the second polarization direction to transmit the second field. The first polarization direction may be the same as the third polarization direction, and the second polarization direction may be different from the fourth polarization direction. Alternatively, the first polarization direction may be different from the third polarization direction, and the second polarization direction may be the same as the fourth polarization direction.

[0244] In other words, the first device can select the corresponding transmission method for transmitting the aforementioned PPDU based on the pre-defined or pre-configured reception method, and as a result, the sensing results in the co-polarization direction and the cross-polarization direction are obtained. In other words, the first device can select the corresponding polarization direction switching pattern for transmitting the aforementioned PPDU based on the pre-defined or pre-configured polarization direction switching pattern, and as a result, the sensing results in the co-polarization direction and the cross-polarization direction are obtained.

[0245] For example, it is assumed that the second information is one PPDU. When N = 2, it is predefined or preconfigured that the second device transmits the second information in the HV reception mode. In other words, the second device receives the first field of the PPDU in the H polarization direction, for example, the first TRN subfield; the second device receives the second field of the PPDU in the V polarization direction, for example, the second TRN subfield. In other words, when receiving a PPDU, the second device switches from the H polarization direction to the V polarization direction.

[0246] In this case, the first device may select an HH transmission mode for transmitting the second information based on the HV reception mode. In other words, the first device may transmit the first field of the PPDU in the H polarization direction, for example, the first TRN subfield; the first device transmits the second field of the PPDU in the H polarization direction, for example, the second TRN subfield. In other words, when transmitting one PPDU, the first device switches from the H polarization direction to the H polarization direction, that is, the polarization direction is not switched. In this way, based on the polarization direction selected by the first device, the sensing results in the co-polarization direction (H-H) and the cross-polarization direction (H-V) can be obtained.

[0247] For example, it is assumed that the second information is one PPDU. When L = 1 and 2L = 2, it is predefined or preconfigured that the second device transmits the second information in the HV reception mode. In other words, the second device receives the first field of the PPDU in the H polarization direction, for example, the first TRN subfield; the second device receives the second field of the PPDU in the V polarization direction, for example, the second TRN subfield. In other words, when receiving a PPDU, the second device switches from the H polarization direction to the V polarization direction.

[0248] In this case, the first device may select an HH transmission method for transmitting the second information based on the HV reception method. In other words, the first device may transmit the first field of the PPDU in the H polarization direction, for example, the first TRN subfield; the first device transmits the second field of the PPDU in the H polarization direction, for example, the second TRN subfield. In other words, when the first device transmits one PPDU, it switches from the H polarization direction to the H polarization direction, that is, the polarization direction cannot be switched. In this way, based on the polarization direction selected by the first device, the sensing results in the co-polarization direction (H-H) and the cross-polarization direction (H-V) can be obtained.

[0249] It should be understood that the above is described as an example using the HV reception method. It is predefined or preconfigured that the second device can receive the second information in the HV reception method, the VH reception method, the HH reception method, or the VV reception method. It should be noted that the second device can use only one of the four reception methods, that is, it is predefined or preconfigured that the second device can use only one of the HV reception method, the VH reception method, the HH reception method, or the VV reception method. Similarly, the above is described as an example using the HH transmission method. It will be understood that the first device may select a transmission method for transmitting the second information based on the predefined or preconfigured reception method of the second device, in which case the sensing results in the co-polarization direction and the cross-polarization direction can be obtained. Details will not be described below.

[0250] In another example, it is assumed that the second information is one PPDU. When N = 4, it is predefined or preconfigured that the second device receives the second information in the HHVV reception mode. In other words, the second device receives the first fields of the PPDU in the H polarization direction, for example, the first TRN subfield and the second TRN subfield; the second device receives the second fields of the PPDU in the V polarization direction, for example, the third TRN subfield and the fourth TRN subfield. In other words, when receiving the PPDU, the second device switches from the H polarization direction to the V polarization direction.

[0251] In this case, the first device may select an HVHV transmission mode for transmitting the second information based on the HHVV reception mode. In other words, the first device may transmit the first fields of the PPDU in the H polarization direction, for example, the first TRN subfield and the third TRN subfield; the first device transmits the second fields of the PPDU in the V polarization direction, for example, the second TRN subfield and the fourth TRN subfield. In this way, based on the polarization direction selected by the first device, the sensing results in the co-polarization directions (H-H and V-V) and the sensing results in the cross-polarization directions (V-H and H-V) can be obtained.

[0252] In another example, it is assumed that the second information is one PPDU. When L = 2 and 2L = 4, it is predefined or preconfigured that the second device receives the second information in the HHVV reception mode. In other words, the second device receives the first fields of the PPDU in the H polarization direction, for example, the first TRN subfield and the second TRN subfield; the second device receives the second fields of the PPDU in the V polarization direction, for example, the third TRN subfield and the fourth TRN subfield. In other words, when receiving the PPDU, the second device switches from the H polarization direction to the V polarization direction.

[0253] In this case, the first device may select an HVHV transmission method for transmitting the second information based on the HHVV reception method. In other words, the first device may transmit the first fields of the PPDU in the H polarization direction, for example, the first TRN sub-field and the third TRN sub-field; the first device may transmit the second fields of the PPDU in the V polarization direction, for example, the second TRN sub-field and the fourth TRN sub-field. In this way, based on the polarization direction selected by the first device, the sensing results in the co-polarization direction (H-H and V-V) and the sensing results in the cross-polarization direction (V-H and H-V) can be obtained.

[0254] It will be understood that the above is described as an example using the HHVV reception method. It is predefined or preconfigured that the second device can receive the second information in multiple reception methods. It should be noted that in the above example, the second device can only use one of the multiple reception methods, for example, the second device can only use the HHVV reception method to receive the second information. Similarly, the above is described as an example using the HVHV transmission method. It will be understood that the first device can select a reception method for receiving the second information based on the predefined or preconfigured reception method of the second device, and in this case, the sensing results in the co-polarization direction and the sensing results in the cross-polarization direction can be obtained. Details will not be described below.

[0255] In another possible case, the first polarization direction may be the polarization direction of the first PPDU, and the second polarization direction may be the polarization direction of the second PPDU. It will be understood that the number of the first PPDUs is not limited to 1, and the number of the second PPDUs is also not limited to 1. For example, when the transmitter switches the polarization direction every N / 2 PPDUs, the first PPDU can be the first PPDU to the (N / 2)-th PPDU, and the second PPDU can be the (N / 2 + 1)-th PPDU to the N-th PPDU.

[0256] In this way, when the first device transmits a plurality of PPDUs, it can select the first polarization direction and the second polarization direction for transmission based on the pre-defined or pre-configured third polarization direction and fourth polarization direction. For example, the first device can select the first polarization direction to transmit the first PPDU and select the second polarization direction to transmit the second PPDU. The first polarization direction may be the same as the third polarization direction, and the second polarization direction may be different from the fourth polarization direction. Alternatively, the first polarization direction may be different from the third polarization direction, and the second polarization direction may be the same as the fourth polarization direction.

[0257] In other words, the first device can select the corresponding transmission method for transmitting a plurality of PPDUs based on the pre-defined or pre-configured reception method, and as a result, the sensing results in the co-polarization direction and the cross-polarization direction are obtained. In other words, the first device can select the corresponding polarization direction switching pattern for transmitting a plurality of PPDUs based on the pre-defined or pre-configured polarization direction switching pattern, and as a result, the sensing results in the co-polarization direction and the cross-polarization direction are obtained.

[0258] For example, it is assumed that the second information is a plurality of PPDUs. When N = 2, it is pre-defined or pre-configured that the second device receives the second information in the HV reception method. In other words, the second device receives the first PPDU in the H polarization direction and receives the second PPDU in the V polarization direction. In other words, when the second device receives a PPDU, it switches from the H polarization direction to the V polarization direction.

[0259] In this case, the first device may select an HH transmission method for transmitting the second information based on the HV reception method. In other words, the first device may transmit the first PPDU in the H polarization direction and transmit the second PPDU in the H polarization direction. In other words, when the first device transmits a plurality of PPDUs, it switches from the H polarization direction to the H polarization direction, that is, the polarization direction cannot be switched. In this way, based on the polarization direction selected by the first device, the sensing results in the co-polarization direction (H-H) and the cross-polarization direction (V-H) can be obtained.

[0260] In another example, it is assumed that the second information is a plurality of PPDUs. When N = 4, it is predefined or preconfigured that the second device receives the second information in the HHVV reception method. In other words, the second device receives the first PPDU in the H polarization direction, for example, the first PPDU and the second PPDU; the second device receives the second PPDU in the V polarization direction, for example, the third PPDU and the fourth PPDU. In other words, when the second device receives a PPDU, it switches from the H polarization direction to the V polarization direction.

[0261] In this case, the first device may select an HVHV transmission method for transmitting the second information based on the HHVV reception method. In other words, the first device may transmit the first PPDU in the H polarization direction, for example, the first PPDU and the third PPDU; the first device transmits the second PPDU in the H polarization direction, for example, the second PPDU and the fourth PPDU. In this way, based on the polarization direction selected by the first device, the sensing results in the co-polarization directions (H-H and V-V) and the cross-polarization directions (V-H and H-V) can be obtained.

[0262] Note that the above has been described using examples of N = 2 and N = 4. When N is an integer greater than or equal to 2, the reception method by which the second device receives the second information may also be predefined or preconfigured. When the second information is received, the first device may select the corresponding transmission method, and as a result, the sensing results in the co-polarization direction and the cross-polarization direction are obtained.

[0263] Based on the technical solution shown in FIG. 8, the manner in which the second device receives the second information may be predefined or preconfigured. As a result, the first device selects a transmission method for transmitting the second information to obtain the sensing results in the co-polarization direction and the cross-polarization direction.

[0264] In the embodiments shown in FIGS. 7 and 8, the sensing results in the co-polarization direction and the cross-polarization direction are obtained based on a technical solution in which the reception method / transmission method is predefined or preconfigured. An embodiment of the present application further provides another information transmission method. In the method, the behavior of transmitting the second information by the first device may be specified. In the related art, when N is an even number, the first device switches the polarization direction after transmitting N / 2 TRN subfields. In the information transmission method provided in this embodiment of the present application, the first device may switch the polarization direction after N / 4 TRN subfields, or may switch the polarization direction for each TRN subfield. The following provides an explanation using FIG. 9.

[0265] FIG. 9 is an exemplary flowchart of an information transmission method according to an embodiment of the present application. The method may include the following operations.

[0266] S901: The first device determines a first polarization direction and a second polarization direction.

[0267] The first polarization direction is different from the second polarization direction.

[0268] S902: The first device transmits first control information to the second device.

[0269] Correspondingly, the second device receives second information from the first device.

[0270] Regarding the second information, it will be understood by referring to the embodiment shown in FIG. 2. For example, the second information may be one PPDU. In another example, the second information may be a plurality of PPDUs.

[0271] If possible, it is assumed that the second information is one PPDU. The polarization direction of the fields from the first field to the (N / 4)-th field of the PPDU is the first polarization direction, the polarization direction of the fields from the (N / 4 + 1)-th field to the (N / 2)-th field is the second polarization direction, the polarization direction of the fields from the (N / 2 + 1)-th field to the (3N / 4)-th field is the first polarization direction, and the polarization direction of the fields from the (3N / 4 + 1)-th field to the N-th field is the second polarization direction, where N is an integer greater than or equal to 2. For example, N may be an integer multiple of 4. In other words, the first device switches the polarization direction once every N / 4 fields of the PPDU.

[0272] Since the second device switches the polarization direction after N / 2 TRN sub-fields, regardless of the polarization direction in which the second device receives the fields from the first field to the N-th field, the co-polarization direction sensing result and the cross-polarization direction sensing result can be obtained.

[0273] For example, it is assumed that the second information is one PPDU. When N = 4, the first device switches the polarization mode after N / 4 = 1 TRN subfield. Without loss of generality, it is assumed that the first polarization direction is the H polarization direction and the second polarization direction is the V polarization direction. In other words, the first device may transmit the first TRN subfield of the PPDU in the H polarization direction. Since the first device switches the polarization mode after one TRN subfield, the first device transmits the second TRN subfield of the PPDU in the V polarization direction. The rest can be inferred by analogy. The first device may transmit the PPDU to the second device in the HVHV polarization direction.

[0274] It is assumed that the second device receives the PPDU in the HHVV polarization direction. Therefore, the sensing results in the co-polarization directions (H-H and V-V) and the sensing results in the cross-polarization directions (H-V and V-H) can be obtained. In another example, it is assumed that the second device receives the PPDU in the VVHH polarization direction. Therefore, the sensing results in the cross-polarization directions (H-V and V-H) and the sensing results in the co-polarization directions (V-V and H-H) can be obtained.

[0275] In another possible case, it is assumed that the second information is a plurality of PPDUs. The polarization direction of the first PPDU to the (N / 4)-th PPDU among the plurality of PPDUs is the first polarization direction, the polarization direction of the (N / 4 + 1)-th PPDU to the (N / 2)-th PPDU is the second polarization direction, the polarization direction of the (N / 2 + 1)-th PPDU to the (3N / 4)-th field is the first polarization direction, and the polarization direction of the (3N / 4 + 1)-th PPDU to the N-th PPDU is the second polarization direction, where N is an integer greater than or equal to 2. For example, N may be an integer multiple of 4. In other words, the first device switches the polarization direction once every N / 4 PPDUs.

[0276] Since the second device switches the polarization direction after N / 2 PPDUs, the sensing results in the co-polarization direction and the cross-polarization direction can be obtained regardless of the polarization direction in which the second device receives a plurality of PPDUs.

[0277] For example, assume that the second information is a plurality of PPDUs. When N = 4, the first device switches the polarization method after N / 4 = 1 PPDU. Without loss of generality, assume that the first polarization direction is the H polarization direction and the second polarization direction is the V polarization direction. In other words, the first device may transmit the first PPDU in the H polarization direction. Since the first device switches the polarization method after one PPDU, the first device transmits the second PPDU in the V polarization direction. The rest is estimated by analogy. The first device may transmit a plurality of PPDUs to the second device in the HVHV polarization direction.

[0278] Assume that the second device receives a plurality of PPDUs in the HHVV polarization direction. Therefore, the sensing results in the co-polarization direction (H-H and V-V) and the cross-polarization direction (H-V and V-H) can be obtained. In another example, assume that the second device receives a PPDU in the VVHH polarization direction. Therefore, the sensing results in the cross-polarization direction (H-V and V-H) and the co-polarization direction (V-V and H-H) can be obtained.

[0279] It will be understood that the above has been described using the example of N = 4. When N is an integer greater than or equal to 2, the first device may switch the polarization direction after N / 4 fields or PPDUs.

[0280] In an embodiment of the present application, the first device may alternatively switch the polarization direction once for each field of the PPDU. If possible, it is assumed that the second information is one PPDU. The polarization direction of the nth field of the PPDU is the first polarization direction, and the polarization direction of the (n + 1)th field is the second polarization direction, where n is an integer from 1 to N. For example, n can be in the range of 1 to N. N is an integer greater than or equal to 2. In other words, the first device switches the polarization direction once for each field of the PPDU.

[0281] Since the second device switches the polarization direction after N / 2 TRN sub-fields, regardless of the polarization direction in which the second device receives the PPDU, the sensing results in the co-polarization direction and the cross-polarization direction can be obtained.

[0282] For example, it is assumed that the second information is one PPDU. When N = 4, the first device switches the polarization scheme for each TRN sub-field. Without loss of generality, it is assumed that the first polarization direction is the H polarization direction and the second polarization direction is the V polarization direction. In other words, the first device may transmit the first TRN sub-field of the PPDU in the H polarization direction. Since the first device switches the polarization scheme for each TRN sub-field, the first device transmits the second TRN sub-field of the PPDU in the V polarization direction, transmits the third TRN sub-field of the PPDU in the H polarization direction, and transmits the fourth TRN sub-field of the PPDU in the V polarization direction.

[0283] It is assumed that the second device receives the PPDU in the HHVV polarization direction. Therefore, the sensing results in the co-polarization direction (H - H and V - V) and the cross-polarization direction (H - V and V - H) can be obtained. In another example, it is assumed that the second device receives the PPDU in the VVHH polarization direction. Therefore, the sensing results in the cross-polarization direction (H - V and V - H) and the co-polarization direction (V - V and H - H) can be obtained.

[0284] In another possible case, it is assumed that the second information is a plurality of PPDUs. The polarization direction of the nth field of the plurality of PPDUs is the first polarization direction, and the polarization direction of the (n + 1)th field is the second polarization direction, where n is an integer from 1 to N. For example, n can be in the range of 1 to N. N is an integer greater than or equal to 2. In other words, the first device switches the polarization direction once for each PPDU.

[0285] For example, it is assumed that the second information is a plurality of PPDUs. When N = 4, the first device switches the polarization scheme for each PPDU. Without loss of generality, it is assumed that the first polarization direction is the H polarization direction and the second polarization direction is the V polarization direction. In other words, the first device may transmit the first PPDU in the H polarization direction. Since the first device switches the polarization scheme for each PPDU, the first device transmits the second PPDU in the V polarization direction, the third PPDU in the H polarization direction, and the fourth PPDU in the V polarization direction.

[0286] It is assumed that the second device receives four PPDUs in the HHVV polarization direction. Therefore, the sensing results in the co-polarization directions (H-H and V-V) and the sensing results in the cross-polarization directions (H-V and V-H) can be obtained. In another example, it is assumed that the second device receives a PPDU in the VV polarization direction. Therefore, the sensing results in the cross-polarization directions (H-V and V-H) and the sensing results in the co-polarization directions (V-V and H-H) can be obtained.

[0287] It will be understood that the above is described using the example of N = 4. When N is an integer greater than or equal to 2, the first device may switch the polarization direction for each field or PPDU.

[0288] Based on the solution shown in FIG. 9, in order to obtain the sensing results in the cross-polarization direction and the co-polarization direction, the behavior of the first device transmitting the second information is changed.

[0289] Note that the embodiment shown in FIG. 9 may be implemented separately or in combination with the embodiments shown in FIGS. 2, 6, 7, and 8.

[0290] In the embodiment shown in FIG. 9, the behavior of transmitting the second information by the first device is changed. One embodiment of the present application further provides another information transmission method. In the method, the behavior of receiving the second information by the second device may be changed. In the related art, when N is an even number, the second device switches the polarization direction after transmitting N / 2 TRN subfields. In the information transmission method provided in this embodiment of the present application, the second device may switch the polarization direction after N / 4 TRN subfields, or may switch the polarization direction for each TRN subfield. Hereinafter, an explanation will be provided using FIG. 10.

[0291] FIG. 10 is an exemplary flowchart of an information transmission method according to an embodiment of the present application. The method may include the following operations.

[0292] S1001: The second device determines a third polarization direction and a fourth polarization direction.

[0293] S1002: The first device transmits the second information to the second device.

[0294] Correspondingly, the second device receives the second information from the first device.

[0295] Regarding the second information, it will be understood by referring to the embodiment shown in FIG. 2. For example, the second information may be one PPDU. In another example, the second information may be a plurality of PPDUs.

[0296] If possible, it is assumed that the second information is one PPDU. The polarization direction in which the second device receives the (N / 4)-th field from the first field of the PPDU is the first polarization direction, the polarization direction in which the (N / 4 + 1)-th field to the (N / 2)-th field is received is the second polarization direction, the polarization direction in which the (N / 2 + 1)-th field to the (3N / 4)-th field is received is the first polarization direction, the polarization direction in which the (3N / 4 + 1)-th field to the N-th field is received is the second polarization direction, where N is an integer greater than or equal to 2. For example, N can be an integer multiple of 4. In other words, the second device switches the polarization direction once every N / 4 fields of the PPDU.

[0297] Since the first device switches the polarization direction after N / 2 TRN sub-fields, regardless of the polarization direction in which the first device transmits N fields, the co-polarization direction sensing result and the cross-polarization direction sensing result can be obtained.

[0298] For example, it is assumed that the second information is one PPDU. When N = 4, the second device switches the polarization mode after N / 4 = 1 TRN sub-field. Without loss of generality, it is assumed that the third polarization direction is the H polarization direction and the fourth polarization direction is the V polarization direction. In other words, the second device can receive the first TRN sub-field of the PPDU in the H polarization direction. Since the second device switches the polarization mode after one TRN sub-field, the second device receives the second TRN sub-field of the PPDU in the V polarization direction. The rest is estimated by analogy. The second device can receive a plurality of fields of the PPDU from the first device in the HVHV polarization direction.

[0299] It is assumed that the first device transmits a plurality of fields of the PPDU in the HHVV polarization direction. Therefore, sensing results in the co-polarization directions (H-H and V-V) and sensing results in the cross-polarization directions (H-V and V-H) can be obtained. In another example, it is assumed that the first device transmits a plurality of fields of the PPDU in the VVHH polarization direction. Thus, sensing results in the cross-polarization directions (H-V and V-H) and sensing results in the co-polarization directions (V-V and H-H) can be obtained.

[0300] In another possible case, it is assumed that the second information is a plurality of PPDUs. The polarization direction in which the second device receives the (N / 4)-th PPDU from the first PPDU of the plurality of PPDUs is the first polarization direction, the polarization direction in which the (N / 4 + 1)-th PPDU to the (N / 2)-th PPDU are received is the second polarization direction, the polarization direction in which the (N / 2 + 1)-th PPDU to the (3N / 4)-th PPDU are received is the first polarization direction, the polarization direction in which the (3N / 4 + 1)-th PPDU to the N-th PPDU are received is the second polarization direction, N is an integer greater than or equal to 2, and for example, N can be an integer multiple of 4. In other words, the second device switches the polarization direction once every N / 4 PPDUs.

[0301] For example, it is assumed that the second information is a plurality of PPDUs. When N = 4, the second device switches the polarization method after N / 4 = 1 PPDU. Without loss of generality, it is assumed that the first polarization direction is the H polarization direction and the second polarization direction is the V polarization direction. In other words, the second device can receive the first PPDU in the H polarization direction. Since the second device switches the polarization method after one PPDU, the second device receives the second PPDU in the V polarization direction. The rest is deduced by analogy. The second device can receive a plurality of PPDUs from the first device in the HVHV polarization direction.

[0302] It is assumed that the first device transmits a plurality of PPDUs in the HHVV polarization direction. Therefore, sensing results in the co-polarization directions (H-H and V-V) and sensing results in the cross-polarization directions (H-V and V-H) can be obtained. In another example, it is assumed that the first device transmits a PPDU in the VVHH polarization direction. Therefore, sensing results in the cross-polarization directions (H-V and V-H) and sensing results in the co-polarization directions (V-V and H-H) can be obtained.

[0303] It will be understood that the above has been described using an example where N = 4. When N is an integer greater than or equal to 2, the second device may switch the polarization direction after N / 4 fields or PPDUs.

[0304] In an embodiment of the present application, the second device may alternatively switch the polarization direction once for each field of the PPDU. If possible, it is assumed that the second information is one PPDU. The polarization direction in which the second device receives the n-th field of the PPDU is the third polarization direction, and the polarization direction in which the second device receives the (n + 1)-th field is the fourth polarization direction, where n is an integer greater than or equal to 1 and less than or equal to N. For example, n may be in the range of 1 to N. N is an integer greater than or equal to 2. In other words, the second device switches the polarization direction for each field of the PPDU.

[0305] Since the first device switches the polarization direction after N / 2 TRN sub-fields, sensing results in the co-polarization direction and sensing results in the cross-polarization direction can be obtained regardless of the polarization direction in which the first device transmits the PPDU.

[0306] For example, it is assumed that the second information is one PPDU. When N = 4, the second device switches the polarization mode for each TRN subfield. Without loss of generality, it is assumed that the first polarization direction is the H polarization direction and the second polarization direction is the V polarization direction. In other words, the second device can receive the first TRN subfield of the PPDU in the H polarization direction. Since the second device switches the polarization mode for each TRN subfield, the second device receives the second TRN subfield of the PPDU in the V polarization direction, receives the third TRN subfield of the PPDU in the H polarization direction, and receives the fourth TRN subfield of the PPDU in the V polarization direction.

[0307] It is assumed that the first device transmits the PPDU in the HHVV polarization direction. Therefore, the sensing results in the co-polarization directions (H-H and V-V) and the sensing results in the cross-polarization directions (H-V and V-H) can be obtained. In another example, it is assumed that the first device transmits the PPDU in the VVHH polarization direction. Therefore, the sensing results in the cross-polarization directions (H-V and V-H) and the sensing results in the co-polarization directions (V-V and H-H) can be obtained.

[0308] In another possible case, it is assumed that the second information is a plurality of PPDUs. The polarization direction in which the second device receives the nth PPDU among the plurality of PPDUs is the third polarization direction, and the polarization direction in which the second device receives the (n + 1)th PPDU is the fourth polarization direction, where n is an integer greater than or equal to 1 and less than or equal to N. For example, n may be in the range of 1 to N. N is an integer greater than or equal to 2. In other words, the second device switches the polarization direction for each PPDU.

[0309] Since the first device switches the polarization direction after N / 2 PPDUs, the sensing results in the co-polarization direction and the sensing results in the cross-polarization direction can be obtained regardless of the polarization direction in which the first device transmits a plurality of PPDUs.

[0310] For example, it is assumed that the second information is a plurality of PPDUs. When N = 4, the second device switches the polarization mode for each PPDU. Without loss of generality, it is assumed that the first polarization direction is the H polarization direction and the second polarization direction is the V polarization direction. In other words, the second device can receive the first PPDU in the H polarization direction. Since the second device switches the polarization mode for each PPDU, the second device receives the second PPDU in the V polarization direction, receives the third PPDU in the H polarization direction, and receives the fourth PPDU in the V polarization direction.

[0311] It is assumed that the first device transmits four PPDUs in the HHVV polarization direction. Therefore, the sensing results in the co-polarization direction (H-H) and the cross-polarization directions (H-V and V-H) can be obtained. In another example, it is assumed that the first device transmits PPDUs in the VVHH polarization direction. Therefore, the sensing results in the cross-polarization directions (H-V and V-H) and the co-polarization directions (V-V and H-H) can be obtained.

[0312] It will be understood that the above has been described using the example of N = 4. When N is an integer greater than or equal to 2, the second device may switch the polarization direction for each field or PPDU.

[0313] Based on the solution shown in FIG. 10, the behavior of the second device receiving the second information is changed in order to obtain the sensing results in the cross-polarization direction and the co-polarization direction.

[0314] Note that the embodiment shown in FIG. 10 may be implemented separately or in combination with the embodiments shown in FIGS. 2, 6, 7, 8, and 9.

[0315] In the embodiments shown in FIGS. 2 and 10, the first device and the second device exchange polarization direction information, and as a result, sensing results in the cross-polarization direction and sensing results in the co-polarization direction are obtained. In the embodiments of the present application, after obtaining the sensing results, the sensing receiver may transmit the sensing results in different polarization directions to the sensing transmitter. Hereinafter, in the embodiments of the present application, a method in which the sensing receiver transmits the sensing results to the sensing transmitter in different polarization directions will be described.

[0316] In one possible implementation form, when transmitting the sensing results, the sensing receiver may add the sensing results obtained by measurement in different polarization directions to the DMG sensing report frame. For example, the sensing receiver may add a field, such as a sensing report polarization field, to the sensing report frame to identify the polarization scheme of the sensing results in the DMG sensing report frame.

[0317] For example, in the linear polarization scenario, when the sensing report polarization field is 0 (or another reserved value), it indicates that the sensing report carried in the DMG sensing report frame does not determine the polarization information of the sensing report. When the sensing report polarization field is 1, it indicates that the polarization direction of the sensing report carried in the DMG sensing report frame is H-H. When the sensing report polarization field is 2, it indicates that the polarization direction of the sensing report carried in the DMG sensing report frame is H-V. When the sensing report polarization field is 3, it indicates that the polarization direction of the sensing report carried in the DMG sensing report frame is V-V. When the sensing report polarization field is 4, it indicates that the polarization direction of the sensing report carried in the DMG sensing report frame is V-H.

[0318] For example, in the circular polarization scenario, when the sensing report polarization field is 0 (or another reserved value), it indicates that the sensing report carried in the DMG sensing report frame does not determine the polarization information of the sensing report. When the sensing report polarization field is 1, it indicates that the polarization direction of the sensing report carried in the DMG sensing report frame is LH-LH. When the sensing report polarization field is 2, it indicates that the polarization direction of the sensing report carried in the DMG sensing report frame is LH-RH. When the sensing report polarization field is 3, it indicates that the polarization direction of the sensing report carried in the DMG sensing report frame is RH-RH. When the sensing report polarization field is 4, it indicates that the polarization direction of the sensing report carried in the DMG sensing report frame is RH-LH.

[0319] If possible, the DMG sensing report frame may include a DMG sensing report element, and the DMG sensing report element may carry the sensing result. The sensing receiver may add the sensing report polarization field to the DMG sensing report element. The sensing report polarization field may indicate the polarization direction of the sensing result in the DMG sensing report element.

[0320] FIG. 11A shows the structure of the DMG sensing report element. The DMG sensing report element may include the fields shown in FIG. 11A. The added sensing report polarization field may be placed at any position within the DMG sensing report element. For example, it may be placed directly in the DMG sensing report element, or as a sub-field in the DMG sensing measurement report type field, or as a sub-field in the DMG sensing report control field, or as a sub-field in the DMG sensing report field. This is not specifically limited in this application.

[0321] Note that the name of the aforementioned field (sensing report polarization) is only shown as an example and is not intended to limit the field. The field may indicate the polarization mode of the sensing result. In addition, the position of the sensing measurement polarization field is only shown as an example. The field may be located after the sensing measurement setup ID and before the sensing measurement burst ID, or after the sensing measurement burst ID and before the measurement instance sequence number, or even before the sensing measurement setup ID. This is not specifically limited in this application. Alternatively, the field may be carried as one or more sub-fields of any one of the sensing measurement setup ID, the sensing measurement burst ID, and the measurement instance sequence number.

[0322] Optionally, the sensing transmitter or the sensing initiator may indicate to the sensing receiver to report the sensing results in different polarization directions via a DMG sensing poll frame. For example, the sensing transmitter or the sensing initiator may indicate to the sensing receiver to report the sensing results in different polarization directions via the TDD beamforming information field of the DMG sensing poll frame. For example, FIG. 11B shows the structure of the TDD beamforming information field of the DMG sensing poll frame. As shown in FIG. 11B, the sensing transmitter may add a field, for example, a sensing measurement polarization field, to the TDD beamforming information field to indicate the sensing results expected by the sensing transmitter.

[0323] For example, in a linear polarization scenario, when the field is 0 (or another reserved value), it may indicate to the sensing receiver to report the sensing result. In this case, polarization measurement may not be performed on the sensing result. When the field is 1, it may indicate to the sensing receiver to report all polarization sensing results, e.g., H-H, H-V, V-V, and V-H. When the field is 2, it may indicate to the sensing receiver to report cross-polarization sensing results, e.g., H-V and / or V-H. When the field is 3, it may indicate to the sensing receiver to report co-polarization sensing results, e.g., H-H and / or V-V. The field may further indicate to the sensing receiver to report one or more of one or more polarization sensing results, e.g., H-H, H-V, V-V, and V-H.

[0324] For example, in a circular polarization scenario, when the field is 0 (or another reserved value), it may indicate to the sensing receiver to report the sensing result. In this case, polarization measurement may not be performed on the sensing result. When the field is 1, it may indicate to the sensing receiver to report all polarization sensing results (e.g., LH-LH, LH-RH, RH-RH, and RH-LH). When the field is 2, it may indicate to the sensing receiver to report cross-polarization sensing results, e.g., LH-RH and / or RH-LH. When the field is 3, it may indicate to the sensing receiver to report co-polarization sensing results, e.g., LH-LH and / or RH-RH. The field may further indicate to the sensing receiver to report one or more of one or more polarization sensing results, e.g., H-LH, LH-RH, RH-RH, and RH-LH.

[0325] The name of the foregoing field (measurement result polarization) is shown only as an example and it should be understood that it is not intended to limit the field. The field may indicate the type of sensing result transmitted by the sensing receiver.

[0326] The following will describe a communication device for implementing the foregoing method in an embodiment of the present application with reference to the accompanying drawings. Accordingly, all of the foregoing content may be used in the following embodiments. Repeated content will not be described again.

[0327] FIG. 12 is a block diagram of a communication device 1200 according to an embodiment of the present application. The communication device 1200 may correspondingly implement the functions or steps implemented by the first device or the second device in the foregoing method embodiment. The communication device may include a processing unit 1210 and a transceiver unit 1220. Optionally, the communication device may further include a storage unit. The storage unit may be configured to store instructions (codes or programs) and / or data. The processing unit 1210 and the transceiver unit 1220 may be coupled to the storage unit. For example, the processing unit 1210 may read instructions (codes or programs) and / or data in the storage unit and implement the corresponding method. The foregoing units may be arranged independently or may be partially or fully integrated.

[0328] In some possible implementations, the communication device 1200 can correspondingly implement the behaviors and functions of the first device in the foregoing method embodiments. For example, the communication device 1200 may be the first device, or may be a component (such as a chip or a circuit) used in the first device. The transceiver unit 1220 is configured to execute all receiving or transmitting operations performed by the first device in the embodiments shown in FIGS. 2 and 6 to 10, for example, S201 and S202 in the embodiment shown in FIG. 2, and / or may be configured to support another process of the technology described herein. The processing unit 1210 is configured to execute all operations performed by the first device in the embodiments shown in FIGS. 2 and 6 to 10 other than the receiving and transmitting operations, and / or may be configured to support another process of the technology described herein.

[0329] For example, the processing unit 1210 is configured to generate first information. The transceiver unit 1220 is configured to transmit the first information to a second network device. The first information indicates a first polarization direction and a second polarization direction. The first polarization direction is different from the second polarization direction. The transceiver unit 1220 is further configured to transmit a PPDU to the second device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction of the first field of the PPDU, and the second polarization direction is the polarization direction of the second field of the PPDU.

[0330] In another example, the transceiver unit 1220 is configured to receive first information from a second device. The first information indicates a first polarization direction and a second polarization direction. The first polarization direction is different from the second polarization direction. The processing unit 1210 is configured to generate a PPDU based on the first information. The transceiver unit 1220 is further configured to transmit the PPDU to the second device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU.

[0331] In another example, the processing unit 1210 is configured to generate a PPDU. The transceiver unit 1220 is further configured to transmit the PPDU to a second device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction in which the first device transmits a first field of the PPDU, and the second polarization direction is the polarization direction in which the first device transmits a second field of the PPDU. The first polarization direction is different from the second polarization direction, and the first polarization direction and the second polarization direction are predefined or preconfigured.

[0332] In another example, the processing unit 1210 is configured to generate a PPDU. The transceiver unit 1220 is configured to transmit the PPDU, and the PPDU is used for sensing measurement. The polarization direction of the first field to the (N / 4)-th field of the PPDU is the first polarization direction, the polarization direction of the (N / 4 + 1)-th field to the (N / 2)-th field of the PPDU is the second polarization direction, the polarization direction of the (N / 2 + 1)-th field to the (3N / 4)-th field of the PPDU is the first polarization direction, the polarization direction of the (3N / 4 + 1)-th field to the N-th field of the PPDU is the second polarization direction, and N is an integer greater than or equal to 2. Alternatively, the polarization direction of the n-th field of the PPDU is the first polarization direction, the polarization direction of the (n + 1)-th field of the PPDU is the second polarization direction, n is greater than or equal to 1 and less than or equal to N, and N is an integer greater than or equal to 2. The first polarization direction is different from the second polarization direction.

[0333] In another example, the processing unit 1210 is configured to generate a PPDU. The transceiver unit 1220 is configured to transmit the PPDU, and the PPDU is used for sensing measurement. The polarization direction of the first field to the L-th field of the PPDU is the first polarization direction, the polarization direction of the (L + 1)-th field to the (2L)-th field of the PPDU is the second polarization direction, and L is an integer greater than or equal to 2. The first polarization direction is different from the second polarization direction.

[0334] In some possible implementations, the communication device 1200 can correspondingly implement the behaviors and functions of the second device in the foregoing method embodiments. For example, the communication device 1200 may be the second device, or may be a component (e.g., a chip or a circuit) used in the second device. The transceiver unit 1220 may be configured to perform all receiving or transmitting operations executed by the second device in the embodiments shown in FIGS. 2 and 6 to 10, such as S601 and S602 in the embodiment shown in FIG. 6, and / or may be configured to support another process of the technology described herein. The processing unit 1210 is configured to perform all operations executed by the second device other than the receiving and transmitting operations, and / or is configured to support another process of the technology described herein.

[0335] For example, the transceiver unit 1220 is configured to receive first information from the first device. The first information indicates a first polarization direction and a second polarization direction. The first polarization direction is different from the second polarization direction. The processing unit 1210 is configured to determine the first polarization direction and the second polarization direction. The transceiver unit 1220 is further configured to receive a PPDU from the first device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction of the first field of the PPDU, and the second polarization direction is the polarization direction of the second field of the PPDU.

[0336] In another example, the processing unit 1210 is configured to generate first information. The transceiver unit 1220 is configured to transmit the first information to a first device, and the first information indicates a first polarization direction and a second polarization direction. The first polarization direction is different from the second polarization direction. The transceiver unit 1220 is further configured to receive a PPDU from the first device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU.

[0337] In another example, the processing unit 1210 is configured to determine a third polarization direction and a fourth polarization direction. The transceiver unit 1220 is configured to receive a PPDU from the first device in the third polarization direction, and the PPDU is used for sensing measurement. The third polarization direction is the polarization direction in which a second device receives a first field of the PPDU, and the fourth polarization direction is the polarization direction in which the second device receives a second field of the PPDU. The third polarization direction is different from the fourth polarization direction, and the third polarization direction and the fourth polarization direction are predefined or preconfigured.

[0338] In another example, the processing unit 1210 is configured to determine a third polarization direction and a fourth polarization direction. The transceiver unit 1220 is configured to receive a PPDU, and the PPDU is used for sensing measurement. The polarization direction of the first field to the (N / 4)-th field of the PPDU is the third polarization direction, the polarization direction of the (N / 4 + 1)-th field to the (N / 2)-th field of the PPDU is the fourth polarization direction, the polarization direction of the (N / 2 + 1)-th field to the (3N / 4)-th field of the PPDU is the third polarization direction, the polarization direction of the (3N / 4 + 1)-th field to the N-th field of the PPDU is the fourth polarization direction, and N is an integer greater than or equal to 1. Alternatively, the polarization direction of the n-th field of the PPDU is the third polarization direction, the polarization direction of the (n + 1)-th field of the PPDU is the fourth polarization direction, n is greater than or equal to 1 and less than or equal to N, and N is an integer greater than or equal to 1. The third polarization direction is different from the fourth polarization direction.

[0339] In another example, the processing unit 1210 is configured to determine a third polarization direction and a fourth polarization direction. The transceiver unit 1220 is configured to receive a PPDU, and the PPDU is used for sensing measurement. The polarization direction of the first field to the L-th field of the PPDU is the third polarization direction, the polarization direction of the (L + 1)-th field to the (2L)-th field of the PPDU is the fourth polarization direction, and L is an integer greater than or equal to 1. The third polarization direction is different from the fourth polarization direction.

[0340] For the operations performed by the processing unit 1210 and the transceiver unit 1220, please refer to the relevant descriptions of the foregoing method embodiments.

[0341] It should be understood that the processing unit 1210 in this embodiment of the present application may be implemented by a processor or a processor-related circuit component, and the transceiver unit 1220 may be implemented by a transceiver, a transceiver-related circuit component, or a communication interface.

[0342] Based on the same concept, as shown in FIG. 13, an embodiment of the present application provides a communication device 1300. The communication device 1300 includes a processor 1310. Optionally, the communication device 1300 may further include a memory 1320 configured to store instructions executed by the processor 1310, store input data required by the processor 1310 to execute the instructions, or store data generated after the processor 1310 executes the instructions. The processor 1310 may implement the methods shown in the embodiments of the foregoing methods by using the instructions stored in the memory 1320.

[0343] Based on the same concept, as shown in FIG. 14, an embodiment of the present application provides a communication device 1400. The communication device 1400 may be a chip or a chip system. Optionally, in this embodiment of the present application, the chip system may include a chip or may include a chip and another discrete component.

[0344] The communication device 1400 may include at least one processor 1410. The processor 1410 is coupled to a memory. Optionally, the memory may be located inside the device or outside the device. For example, the communication device 1400 may further include at least one memory 1420. The memory 1420 stores a computer program, configuration information, computer programs or instructions, and / or data required to implement any one of the foregoing embodiments. The processor 1410 may execute the computer program stored in the memory 1420 to complete the method in any one of the foregoing embodiments.

[0345] The coupling in this embodiment of the present application may be an indirect coupling or communication connection between devices, units, or modules in electrical form, mechanical form, or other forms, and is used for information exchange between devices, units, or modules. The processor 1410 may cooperate with the memory 1420. The specific connection medium between the transceiver 1430, the processor 1410, and the memory 1420 is not limited in this embodiment of the present application.

[0346] The communication device 1400 may further include a transceiver 1430, and the communication device 1400 may use the transceiver 1430 to exchange information with another device. The transceiver 1430 may be a circuit, a bus, a transceiver, or any other device configured to exchange information, or may be called a signal transceiver unit. As shown in FIG. 14, the transceiver 1430 includes a transmitter 1431, a receiver 1432, and an antenna 1433. In addition, when the communication device 1400 is a chip-type device or circuit, the transceiver in the communication device 1400 may alternatively be an input / output circuit and / or a communication interface, which can input data (or called received data) and output data (or called transmitted data). The processor is an integrated processor, a microprocessor, or an integrated circuit, and the processor can determine output data based on the input data.

[0347] In a possible implementation form, the communication device 1400 may be used in the first device. Specifically, the communication device 1400 may be the first device, or may be a device that can support the first device when implementing the function of the first device in any one of the foregoing embodiments. The memory 1420 stores the computer program, computer program or instruction, and / or data necessary for implementing the function of the first device in any one of the foregoing embodiments. To complete the method executed by the first device in any one of the foregoing embodiments, the processor 1410 may execute the computer program stored in the memory 1420.

[0348] In another possible implementation, the communication device 1400 may be used in a second device. Specifically, the communication device 1400 may be a terminal device, or may be a device capable of supporting the second device when implementing the functions of the second device in any one of the foregoing embodiments. The memory 1420 stores a computer program, computer program or instruction, and / or data necessary for implementing the functions of the second device in any one of the foregoing embodiments. To complete the method executed by the second device in any one of the foregoing embodiments, the processor 1410 may execute the computer program stored in the memory 1420.

[0349] The communication device 1400 provided in this embodiment may be used in the first device to complete the method executed by the first device, or may be used in the second device to complete the method executed by the second device. Therefore, for the technical effects that can be achieved by this embodiment, please refer to the method embodiments described above. Details will not be described again in this specification.

[0350] In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or another programmable logic device, discrete gate or transistor logic device, or discrete hardware component, and may implement or execute the methods, steps, and logical block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the methods disclosed with reference to the embodiments of the present application may be directly executed by a hardware processor, or may be executed using a combination of hardware in the processor and software modules.

[0351] In an embodiment of the present application, the memory may be a non-volatile memory, for example, a hard disk drive (HDD) or a solid-state drive (SSD), or a volatile memory, for example, a random-access memory (RAM). Alternatively, the memory may be any other medium accessible by a computer that is configured to hold or store expected program code in the form of instructions or data structures, but is not limited thereto. The memory in this embodiment of the present application may alternatively be a circuit or any other device capable of implementing a storage function, and is configured to store a computer program, a computer program or instructions, and / or data.

[0352] Please refer to FIG. 15. Based on the foregoing embodiments, an embodiment of the present application further provides another communication device 1500 including an input / output interface 1510 and a logic circuit 1520. The input / output interface 1510 is configured to receive code instructions and transmit the code instructions to the logic circuit 1520. The logic circuit 1520 is configured to execute the code instructions in order to execute the method executed by the first device or the method executed by the second device in any one of the foregoing embodiments.

[0353] Hereinafter, the operations executed by the communication device used in the first device or the second device will be described in detail.

[0354] In an optional implementation, the communication device 1500 may be used in the first device to execute the method executed by the first device. For example, the method may specifically be the method executed by the first device in the embodiments shown in FIGS. 2 and 6 to 10.

[0355] For example, the logic circuit 1520 is configured to generate first information. The input / output interface 1510 is configured to output the first information to a second device. The first information indicates a first polarization direction and a second polarization direction. The first polarization direction is different from the second polarization direction. The input / output interface 1510 is further configured to output a PPDU to the second device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU.

[0356] In another example, the input / output interface 1510 is configured to input the first information from a second device. The first information indicates a first polarization direction and a second polarization direction. The first polarization direction is different from the second polarization direction. The logic circuit 1520 is configured to generate a PPDU based on the first information. The input / output interface 1510 is further configured to output the PPDU to the second device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU.

[0357] In another example, the logic circuit 1520 is configured to generate a PPDU. The input / output interface 1510 is configured to output the PPDU to a second device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction in which the first device outputs a first field of the PPDU, and the second polarization direction is the polarization direction in which the first device outputs a second field of the PPDU. The first polarization direction is different from the second polarization direction, and the first polarization direction and the second polarization direction are predefined or preconfigured.

[0358] In another example, the logic circuit 1520 is configured to generate a PPDU. The input / output interface 1510 is configured to output the PPDU, and the PPDU is used for sensing measurements. The polarization direction of the first field to the (N / 4)-th field of the PPDU is the first polarization direction, the polarization direction of the (N / 4 + 1)-th field to the (N / 2)-th field of the PPDU is the second polarization direction, the polarization direction of the (N / 2 + 1)-th field to the (3N / 4)-th field of the PPDU is the first polarization direction, the polarization direction of the (3N / 4 + 1)-th field to the N-th field of the PPDU is the second polarization direction, and N is an integer greater than or equal to 2. Alternatively, the polarization direction of the n-th field of the PPDU is the first polarization direction, the polarization direction of the (n + 1)-th field of the PPDU is the second polarization direction, n is greater than or equal to 1 and less than or equal to N, and N is an integer greater than or equal to 2. The first polarization direction is different from the second polarization direction.

[0359] In another alternative implementation, the communication device 1500 can be used in a second device to execute a method executed by the second device. For example, the method may specifically be a method executed by the second device in the method embodiments shown in FIGS. 2 and 6 to 10.

[0360] For example, the input / output interface 1510 is configured to input first information from a first device. The first information indicates the first polarization direction and the second polarization direction. The first polarization direction is different from the second polarization direction. The logic circuit 1520 is configured to determine the first polarization direction and the second polarization direction. The input / output interface 1510 is further configured to input a PPDU from the first device, and the PPDU is used for sensing measurements. The first polarization direction is the polarization direction of the first field of the PPDU, and the second polarization direction is the polarization direction of the second field of the PPDU.

[0361] In another example, the logic circuit 1520 is configured to generate first information. The input / output interface 1510 is configured to output the first information to a first device, and the first information indicates a first polarization direction and a second polarization direction. The first polarization direction is different from the second polarization direction. The input / output interface 1510 is further configured to input a PPDU from the first device, and the PPDU is used for sensing measurement. The first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU.

[0362] In another example, the logic circuit 1520 is configured to determine a third polarization direction and a fourth polarization direction. The input / output interface 1510 is configured to input a PPDU from the first device in the third polarization direction, and the PPDU is used for sensing measurement. The third polarization direction is the polarization direction in which a second device inputs a first field of the PPDU, and the fourth polarization direction is the polarization direction in which the second device inputs a second field of the PPDU. The third polarization direction is different from the fourth polarization direction, and the third polarization direction and the fourth polarization direction are predefined or preconfigured.

[0363] In another example, the logic circuit 1520 is configured to determine a third polarization direction and a fourth polarization direction. The input / output interface 1510 is configured to input a PPDU, and the PPDU is used for sensing measurement. The polarization direction of the first field to the (N / 4)-th field of the PPDU is the third polarization direction, the polarization direction of the (N / 4 + 1)-th field to the (N / 2)-th field of the PPDU is the fourth polarization direction, the polarization direction of the (N / 2 + 1)-th field to the (3N / 4)-th field of the PPDU is the third polarization direction, the polarization direction of the (3N / 4 + 1)-th field to the N-th field of the PPDU is the fourth polarization direction, and N is an integer greater than or equal to 1. Alternatively, the polarization direction of the n-th field of the PPDU is the third polarization direction, the polarization direction of the (n + 1)-th field of the PPDU is the fourth polarization direction, n is greater than or equal to 1 and less than or equal to N, and N is an integer greater than or equal to 1. The third polarization direction is different from the fourth polarization direction.

[0364] The communication device 1500 provided in this embodiment may be used in the second device to execute the method executed by the second device, or may be used in the second device to complete the method executed by the second device. Therefore, for the technical effects that can be achieved by this embodiment, please refer to the embodiments of the foregoing method. Details will not be described again in this specification.

[0365] Based on the foregoing embodiments, an embodiment of the present application further provides a communication system. The communication system includes at least one communication device used in the first device and at least one communication device used in the second device. For the technical effects that can be achieved by this embodiment, please refer to the embodiments of the foregoing method. Details will not be described again in this specification.

[0366] Based on the foregoing embodiments, an embodiment of the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program or instructions. When the instructions are executed, the method executed by the first device or the method executed by the second device in any one of the foregoing embodiments is implemented. The computer-readable storage medium may include program code, for example, any medium that can store a USB flash drive, a removable hard disk drive, a read-only memory, a random access memory, a magnetic disk, or an optical disk.

[0367] To implement the functions of the communication device in FIGS. 12 to 15, an embodiment of the present application further provides a chip including a processor configured to support a communication device when implementing the functions of the first device or the second device in the foregoing method embodiment. In one possible design, the chip is connected to a memory, or the chip includes a memory. The memory is configured to store a computer program or instructions and data required for the communication device.

[0368] Those skilled in the art should understand that the embodiments of the present application can be provided in the form of a method, a system, or a computer program product. Therefore, the present application may use forms including embodiments that are only hardware embodiments, only software embodiments, or combinations of software and hardware. Further, the present application may also use the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) including computer-usable program code.

[0369] This application is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It should be understood that a computer program or instructions can be used to implement each step and / or each block in the flowchart and / or block diagram, as well as combinations of steps and / or blocks in the flowchart and / or block diagram. A computer program or instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or another programmable data processing device to generate a machine, whereby the instructions executed by the processor of the computer or another programmable data processing device generate an apparatus for implementing specific functions in one or more steps of the flowchart and / or one or more blocks of the block diagram.

[0370] Alternatively, a computer program or instructions can be stored in a computer-readable memory that can instruct a computer or another programmable data processing device to operate in a specific manner, such that the instructions stored in the computer-readable memory generate an artifact including an instruction device. The instruction device implements specific functions in one or more steps of the flowchart and / or one or more blocks of the block diagram.

[0371] Alternatively, a computer program or instructions can be loaded onto a computer or another programmable data processing device, such that a series of operation steps are performed on the computer or another programmable device to generate a computer-implemented process. Accordingly, the instructions executed on a computer or another programmable device provide steps for implementing specific functions in one or more steps of the flowchart and / or one or more blocks of the block diagram.

[0372] It is obvious that those skilled in the art may make various modifications and variations to the embodiments of the present application without departing from the scope of the embodiments of the present application. This application is intended to cover these modifications and variations of the embodiments of the present application as long as they fall within the scope of protection defined by the following claims and their equivalent technologies.

Explanation of Reference Numerals

[0373] 1200 Communication device 1210 Processing unit 1220 Transceiver unit 1300 Communication device 1310 Processor 1320 Memory 1400 Communication device 1410 Processor 1420 Memory 1430 Transceiver 1431 Transmitter 1432 Receiver 1433 Antenna 1500 Communication device 1510 Input / output interface 1520 Logic circuit

Claims

1. An information transmission method, comprising: a step of transmitting first information from a first device to a second device, wherein the first information indicates a first polarization direction and a second polarization direction, and the first polarization direction is different from the second polarization direction; a step of transmitting a physical layer protocol data unit (PPDU) from the first device to the second device, wherein the PPDU is used for sensing measurement; wherein the first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU. An information transmission method.

2. An information transmission method, comprising: a step of receiving first information from a second device by a first device, wherein the first information indicates a first polarization direction and a second polarization direction, and the first polarization direction is different from the second polarization direction; a step of transmitting a physical layer protocol data unit (PPDU) from the first device to the second device, wherein the PPDU is used for sensing measurement; wherein the first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU. An information transmission method.

3. The method according to claim 1 or 2, wherein the first polarization direction is used by the second device to receive the first field, and the second polarization direction is used by the second device to receive the second field.

4. The step of transmitting the PPDU from the first device to the second device comprises: a step of transmitting the first field in the first polarization direction from the first device to the second device; and a step of transmitting the second field in the second polarization direction from the first device to the second device. The method according to claim 1 or 2.

5. The method according to any one of claims 1 to 4, wherein the first information is carried by at least one of the following: a sensing measurement setup request, a sensing measurement setup response, an instance request, and an instance response.

6. The method according to any one of claims 1 to 4, wherein the first information is carried in the header information of the PPDU. **Claim 7** The first polarization direction includes horizontal polarization in a linear polarization mode, and the second polarization direction includes vertical polarization in the linear polarization direction, or The first polarization direction includes vertical polarization in a linear polarization mode, and the second polarization direction includes horizontal polarization in the linear polarization direction, or The first polarization direction includes left-handed circular polarization in a circular polarization mode, and the second polarization direction includes right-handed circular polarization in the circular polarization mode, or The first polarization direction includes right-handed circular polarization in a circular polarization mode, and the second polarization direction includes left-handed circular polarization in the circular polarization mode, The method according to any one of claims 1 to 6. **Claim 8** A step of receiving sensing result information from the second device by the first device, wherein the sensing result information includes second indication information and a sensing result, and the second indication information indicates a polarization mode of the sensing result. The method according to any one of claims 1 to 7, further comprising the step. **Claim 9** The method according to claim 8, wherein the second indication information is carried in a DMG sensing report element or a DMG sensing report frame. **Claim 10** An information transmission method, comprising: A step of receiving first information from a first device by a second device, wherein the first information indicates a first polarization direction and a second polarization direction, and the first polarization direction is different from the second polarization direction. A step of receiving a physical layer protocol data unit (PPDU) from the first device by the second device, wherein the PPDU is used for sensing measurement. Including, The first polarization direction is the polarization direction of a first field of the PPDU, and the second polarization direction is the polarization direction of a second field of the PPDU. An information transmission method. **Claim 11** An information transmission method, comprising: A step of transmitting first information to a first device by a second device, wherein the first information indicates a first polarization direction and a second polarization direction, and the first polarization direction is different from the second polarization direction. A step of receiving a physical layer protocol data unit (PPDU) from the first device by the second device, wherein the PPDU is used for sensing measurement. Including, The first polarization direction is the polarization direction of the first field of the PPDU, and the second polarization direction is the polarization direction of the second field of the PPDU. Information transmission method.

12. The step of receiving, by the second device, a physical layer protocol data unit (PPDU) from the first device includes: The step of receiving, by the second device, a first field from the first device in the first polarization direction; and The step of receiving, by the second device, a second field from the first device in the second polarization direction. The method according to claim 10 or 11.

13. The first polarization direction is used by the first device to transmit the first field, and the second polarization direction is used by the first device to transmit the second field. The step of receiving, by the second device, a physical layer protocol data unit (PPDU) from the first device includes: The step of receiving, by the second device, the first field from the first device in a third polarization direction; and The step of receiving, by the second device, the second field from the first device in a fourth polarization direction. The first polarization direction is the same as the third polarization direction, and the second polarization direction is different from the fourth polarization direction, or the first polarization direction is different from the third polarization direction, and the second polarization direction is the same as the fourth polarization direction. Including The method according to claim 10 or 11.

14. The method according to any one of claims 10 to 13, wherein the first information is carried by at least one of the following: a sensing measurement setup request, a sensing measurement setup response, an instance request, and an instance response.

15. The method according to any one of claims 10 to 13, wherein the first information is carried by the header information of the PPDU.

16. The first polarization direction includes horizontal polarization in a linear polarization mode, and the second polarization direction includes vertical polarization in the linear polarization direction, or The first polarization direction includes vertical polarization in a linear polarization mode, and the second polarization direction includes horizontal polarization in the linear polarization direction, or The first polarization direction includes left-handed circular polarization in a circular polarization mode, and the second polarization direction includes right-handed circular polarization in the circular polarization mode, or ​ The first polarization direction includes a right-handed circular polarization of a circular polarization scheme, and the second polarization direction includes a left-handed circular polarization of the circular polarization scheme. The method according to any one of claims 10 to 15.

17. A step of transmitting sensing result information to the first device by the second device, where the sensing result information includes second instruction information and a sensing result, and the second instruction information indicates a polarization scheme of the sensing result. The method according to any one of claims 10 to 16, further comprising.

18. The method according to claim 17, wherein the second instruction information is carried by a DMG sensing report element or a DMG sensing report frame.

19. An information transmission method, A step of transmitting a PPDU to a second device by a first device, where the PPDU is used for sensing measurement. Including The polarization direction in which the first device transmits the first field of the PPDU is the first polarization direction, the polarization direction in which the first device transmits the second field of the PPDU is the second polarization direction, the first polarization direction is different from the second polarization direction, and the first polarization direction and the second polarization direction are predefined or preconfigured. Information transmission method.

20. An information transmission method, A step of transmitting a physical layer protocol data unit PPDU by a first device, where the PPDU is used for sensing measurement. Including The polarization direction of the fields from the first field to the (N / 4)-th field of the PPDU is the first polarization direction, the polarization direction of the fields from the (N / 4 + 1)-th field to the (N / 2)-th field of the PPDU is the second polarization direction, the polarization direction of the fields from the (N / 2 + 1)-th field to the (3N / 4)-th field of the PPDU is the first polarization direction, the polarization direction of the fields from the (3N / 4 + 1)-th field to the N-th field of the PPDU is the second polarization direction, N is an integer greater than or equal to 2, or the polarization direction of the n-th field of the PPDU is the first polarization direction, the polarization direction of the (n + 1)-th field of the PPDU is the second polarization direction, n is an integer greater than or equal to 1 and less than or equal to N, and N is an integer greater than or equal to 2. The first polarization direction is different from the second polarization direction. Information transmission method.

21. An information transmission method, a step of transmitting, by a first device, a physical layer protocol data unit (PPDU) to a second device, where the PPDU is used for sensing measurement, including the polarization direction of the first field to the L-th field of the PPDU being a first polarization direction, the polarization direction of the (L + 1)-th field to the (2L)-th field of the PPDU being a second polarization direction, L being an integer greater than or equal to 1, the first polarization direction being different from the second polarization direction, an information transmission method.

22. the first polarization direction includes horizontal polarization in a linear polarization mode, and the second polarization direction includes vertical polarization in the linear polarization direction, or the first polarization direction includes vertical polarization in a linear polarization mode, and the second polarization direction includes horizontal polarization in the linear polarization direction, or the first polarization direction includes left-handed circular polarization in a circular polarization mode, and the second polarization direction includes right-handed circular polarization in the circular polarization mode, or the first polarization direction includes right-handed circular polarization in a circular polarization mode, and the second polarization direction includes left-handed circular polarization in the circular polarization mode, the method according to any one of claims 19 to 21.

23. the first device receives sensing result information from the second device, the sensing result information includes second indication information and a sensing result, and the second indication information indicates the polarization mode of the sensing result, the method according to any one of claims 19 to 22.

24. the method according to claim 23, wherein the second indication information is carried by a DMG sensing report element or a DMG sensing report frame.

25. An information transmission method, a step of receiving, by a second device, a physical layer protocol data unit (PPDU) from a first device in a third polarization direction, where the PPDU is used for sensing measurement, including the polarization direction in which the second device receives the first field of the PPDU being a third polarization direction, the polarization direction in which the second device receives the second field of the PPDU being a fourth polarization direction, the third polarization direction being different from the fourth polarization direction, and the third polarization direction and the fourth polarization direction being predefined or preconfigured, an information transmission method.

26. An information transmission method, Receiving, by a second device, a physical layer protocol data unit (PPDU), wherein the PPDU is used for sensing measurement comprising wherein a polarization direction of a (N / 4)-th field to an N-th field from a first field of the PPDU is a third polarization direction, a polarization direction of a (N / 4 + 1)-th field to a (N / 2)-th field from the first field of the PPDU is a fourth polarization direction, a polarization direction of a (N / 2 + 1)-th field to a (3N / 4)-th field from the first field of the PPDU is the third polarization direction, a polarization direction of a (3N / 4 + 1)-th field to an N-th field from the first field of the PPDU is the fourth polarization direction, N is an integer greater than or equal to 2; or a polarization direction of an n-th field of the PPDU is the third polarization direction, a polarization direction of an (n + 1)-th field of the PPDU is the fourth polarization direction, n is an integer greater than or equal to 1 and less than or equal to N, and N is an integer greater than or equal to 2 wherein the third polarization direction is different from the fourth polarization direction An information transmission method

27. An information transmission method, comprising receiving, by a second device, a physical layer protocol data unit (PPDU), wherein the PPDU is used for sensing measurement comprising wherein a polarization direction of a first field to an L-th field of the PPDU is a third polarization direction, a polarization direction of an (L + 1)-th field to a (2L)-th field of the PPDU is a fourth polarization direction, and L is an integer greater than or equal to 1 wherein the third polarization direction is different from the fourth polarization direction An information transmission method

28. wherein the third polarization direction includes a horizontal polarization of a linear polarization mode, and the fourth polarization direction includes a vertical polarization of the linear polarization direction; or wherein the third polarization direction includes a vertical polarization of a linear polarization mode, and the fourth polarization direction includes a horizontal polarization of the linear polarization direction; or wherein the third polarization direction includes a left-handed circular polarization of a circular polarization mode, and the fourth polarization direction includes a right-handed circular polarization of the circular polarization mode; or wherein the third polarization direction includes a right-handed circular polarization of a circular polarization mode, and the fourth polarization direction includes a left-handed circular polarization of the circular polarization mode The method according to any one of claims 25 to 27

29. A step of transmitting sensing result information to the first device by the second device, where the sensing result information includes second instruction information and a sensing result, and the second instruction information indicates a polarization mode of the sensing result The method according to any one of claims 25 to 28, further comprising **Claim 30** The method according to claim 29, wherein the second instruction information is carried in a DMG sensing report element or a DMG sensing report frame **Claim 31** An information transmission method, comprising A step of transmitting a directional multi-gigabit DMG sensing beam descriptor element to a second device by a first device, where the sensing beam descriptor element includes a beam descriptor field, and the beam descriptor field indicates a beam polarization direction A step of transmitting a physical layer protocol data unit PPDU to the second device in the beam polarization direction by the first device, where the PPDU is used for sensing measurement An information transmission method comprising **Claim 32** The beam descriptor field is as follows A horizontal polarization HP subfield, where the HP subfield indicates that the polarization direction of the beam is horizontal polarization A vertical polarization VP subfield, where the VP subfield indicates that the polarization direction of the beam is vertical polarization A left-handed circular polarization LHCP subfield, where the LHCP subfield indicates that the polarization direction of the beam is left-handed circular polarization, or A right-handed circular polarization RHCP subfield, where the RHCP subfield indicates that the polarization direction of the beam is right-handed circular polarization The method according to claim 31, comprising one or more of the above **Claim 33** The sensing beam descriptor element includes a first beam descriptor field and a second beam descriptor field, the first beam descriptor field indicates a first beam polarization direction, and the second beam descriptor field indicates a second beam polarization direction The step of transmitting the PPDU to the second device in the beam polarization direction by the first device is The step of transmitting, by the first device, the first field of the PPDU to the second device in the first polarization direction The step of transmitting, by the first device, the second field of the PPDU to the second device in the second polarization direction The method according to claim 31, comprising:

34. The method according to claim 33, wherein the first polarization direction is either horizontal polarization of the linear polarization scheme or vertical polarization of the linear polarization scheme, and the second polarization direction is either horizontal polarization of the linear polarization scheme or vertical polarization of the linear polarization scheme

35. The method according to claim 33, wherein the first polarization direction is either left-handed circular polarization of the circular polarization scheme or right-handed circular polarization of the circular polarization scheme, and the second polarization direction is either left-handed circular polarization of the circular polarization scheme or right-handed circular polarization of the circular polarization scheme

36. The step of transmitting, by the first device, the capability information of the first device to the second device, wherein the capability information includes the polarization direction supported by the first device The method according to any one of claims 31 to 35, further comprising:

37. The method according to claim 36, wherein the capability information is carried by a DMG sensing capability element

38. The step of receiving, by the first device, sensing result information from the second device, wherein the sensing result information includes indication information and a sensing result, and the indication information indicates the polarization scheme of the sensing result The method according to any one of claims 31 to 37, further comprising:

39. In linear polarization, the indication information is such that the polarization scheme of the sensing result is as follows: When the value of the indication information is 1, the indication information indicates that the polarization direction of the sensing result is horizontal polarization - horizontal polarization H - H When the value of the indication information is 2, the indication information indicates that the polarization direction of the sensing result is horizontal polarization - vertical polarization H - V When the value of the indication information is 3, the indication information indicates that the polarization direction of the sensing result is vertical polarization - vertical polarization V - V, and When the value of the indication information is 4, the indication information indicates that the polarization direction of the sensing result is vertical polarization - horizontal polarization V - H The method according to claim 38, indicating that it is any one of the above

40. In the case of circular polarization, the indication information indicates that the polarization mode of the sensing result is as follows: When the value of the indication information is 1, the indication information indicates that the polarization direction of the sensing result is left-handed circular polarization - left-handed circular polarization LH - LH. When the value of the indication information is 2, the indication information indicates that the polarization direction of the sensing result is left-handed circular polarization - right-handed circular polarization LH - RH. When the value of the indication information is 3, the indication information indicates that the polarization direction of the sensing result is right-handed circular polarization - right-handed circular polarization RH - RH, and When the value of the indication information is 4, the indication information indicates that the polarization direction of the sensing result is right-handed circular polarization - left-handed circular polarization RH - LH. The method according to claim 38, wherein the method is any one of the above.

41. The method according to any one of claims 38 to 40, wherein the indication information is carried within a DMG sensing report element.

42. An information transmission method, comprising: Receiving, by a second device, a directional multi-gigabit DMG sensing beam descriptor element from a first device, wherein the sensing beam descriptor element includes a beam descriptor field, and the beam descriptor field indicates a beam polarization direction; Receiving, by the second device, a physical layer protocol data unit PPDU from the first device, wherein the PPDU is used for sensing measurement; and the beam polarization direction is the polarization direction in which the first device transmits the PPDU. The information transmission method.

43. The beam descriptor field is as follows: A horizontal polarization HP sub-field, wherein the HP sub-field indicates that the polarization direction of the beam is horizontal polarization; A vertical polarization VP sub-field, wherein the VP sub-field indicates that the polarization direction of the beam is vertical polarization; A left-handed circular polarization LHCP sub-field, wherein the LHCP sub-field indicates that the polarization direction of the beam is left-handed circular polarization; and A right-handed circular polarization RHCP sub-field, wherein the RHCP sub-field indicates that the polarization direction of the beam is right-handed circular polarization. The method according to claim 42, comprising one or more of the following.

44. The sensing beam descriptor element includes a first beam descriptor field and a second beam descriptor field, the first beam descriptor field indicates a first beam polarization direction, and the second beam descriptor field indicates a second beam polarization direction. The first polarization direction is the polarization direction in which the first device transmits the first field of the PPDU, and the second polarization direction is the polarization direction in which the first device transmits the second field of the PPDU. The method according to claim 42.

45. The method according to claim 44, wherein the first polarization direction is either horizontal polarization of the linear polarization mode or vertical polarization of the linear polarization mode, and the second polarization direction is either horizontal polarization of the linear polarization mode or vertical polarization of the linear polarization mode.

46. The method according to claim 44, wherein the first polarization direction is either left-handed circular polarization of the circular polarization mode or right-handed circular polarization of the circular polarization mode, and the second polarization direction is either left-handed circular polarization of the circular polarization mode or right-handed circular polarization of the circular polarization mode.

47. A step of transmitting, by the second device, capability information of the second device to the first device, wherein the capability information includes a polarization direction supported by the first device. The method according to any one of claims 42 to 46, further comprising the step.

48. The method according to claim 47, wherein the capability information is carried by a DMG sensing capability element.

49. A step of transmitting, by the second device, sensing result information to the first device, wherein the sensing result information includes indication information and a sensing result, and the indication information indicates a polarization mode of the sensing result. The method according to any one of claims 42 to 48, further comprising the step.

50. In linear polarization, the indication information indicates that the polarization mode of the sensing result is as follows: When the value of the indication information is 1, the indication information indicates that the polarization direction of the sensing result is horizontal polarization - horizontal polarization H - H. When the value of the indication information is 2, the indication information indicates that the polarization direction of the sensing result is horizontal polarization - vertical polarization H - V. When the value of the indication information is 3, the indication information indicates that the polarization direction of the sensing result is vertical polarization - vertical polarization V - V, and When the value of the indication information is 4, the indication information indicates that the polarization direction of the sensing result is vertical polarization - horizontal polarization V - H, The method according to claim 49, wherein it is indicated that it is either of the above.

51. In the case of circular polarization, the indication information indicates that the polarization mode of the sensing result is as follows: When the value of the indication information is 1, the indication information indicates that the polarization direction of the sensing result is left-handed circular polarization - left-handed circular polarization LH - LH, When the value of the indication information is 2, the indication information indicates that the polarization direction of the sensing result is left-handed circular polarization - right-handed circular polarization LH - RH, When the value of the indication information is 3, the indication information indicates that the polarization direction of the sensing result is right-handed circular polarization - right-handed circular polarization RH - RH, and When the value of the indication information is 4, the indication information indicates that the polarization direction of the sensing result is right-handed circular polarization - left-handed circular polarization RH - LH, The method according to claim 49, wherein it is indicated that it is either of the above.

52. The method according to any one of claims 49 to 51, wherein the indication information is carried within a DMG sensing report element.

53. A unit configured to execute the method according to any one of claims 1 and 3 to 9, or a unit configured to execute the method according to any one of claims 2 to 9, or a unit configured to execute the method according to any one of claims 10 and 12 to 18, or a unit configured to execute the method according to any one of claims 11 to 18, or a unit configured to execute the method according to any one of claims 19 and 22 to 24, or a unit configured to execute the method according to any one of claims 20 and 22 to 24, or a unit configured to execute the method according to any one of claims 21 to 24, or a unit configured to execute the method according to any one of claims 25 and 28 to 30, or a unit configured to execute the method according to any one of claims 26 and 28 to 30, or a unit configured to execute the method according to any one of claims 27 to 30, or a unit configured to execute the method according to any one of claims 31 to 41, or a unit configured to execute the method according to any one of claims 42 to 52, a communication device comprising the same.

54. A communication device, the device comprising a processor and a memory, the memory being configured to store a computer program or instructions The processor executes the computer program or the instructions in the memory so that the device performs the method according to any one of claims 1 and 3 to 9, or the method according to any one of claims 2 to 9, or the method according to any one of claims 10 and 12 to 18, or the method according to any one of claims 11 to 18, or the method according to any one of claims 19 and 22 to 24, or the method according to any one of claims 20 and 22 to 24, or the method according to any one of claims 21 to 24, or the method according to any one of claims 25 and 28 to 30, or the method according to any one of claims 26 and 28 to 30, or the method according to any one of claims 27 to 30, or the method according to any one of claims 31 to 41, or the method according to any one of claims 42 to 52, and is configured to enable this. A communication device.

55. A computer-readable storage medium that stores computer-executable instructions, and when the computer-executable instructions are called by an electronic device, the electronic device is enabled to perform the method according to any one of claims 1 to 52.

56. A computer program product including computer-executable instructions, and when the computer-executable instructions are executed on a computer, the computer is enabled to perform the method according to any one of claims 1 to 52.

57. A chip system, a memory configured to store a computer program or instructions, and a processor configured to execute the computer program or the instructions in the memory so that a communication device including the chip system is enabled to perform the method according to any one of claims 1 to 52. A chip system comprising the above.

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