MÉTODO DE INDICAÇÃO DE POTÊNCIA E APARELHO DE COMUNICAÇÃO

Description

1 / 92 METHOD OF INDICATING POWER AND COMMUNICATION DEVICE Separated from application BR 112025010015-7, filed on November 29, 2023.

[001] This application claims priority over Chinese Patent Application No. 202211510868.7, filed with the National Intellectual Property Administration of China on November 29, 2022, and entitled POWER INDICATION METHOD AND COMMUNICATION APPARATUS, which is incorporated into the present invention by reference in its entirety. TECHNICAL FIELD

[002] This application relates to the field of communication and, more specifically, to a method of indicating power and a communication apparatus. BACKGROUND

[003] When stations in a basic service set (BSS) communicate with each other, access point (AP) stations can notify all non-access point stations (non-AP STAs) about the maximum power spectral densities (PSDs) corresponding to the BSS operating channels. For example, the AP can broadcast a beacon frame or a probe response frame that carries a transmit power envelope element. Each non-AP STA can learn, based on the transmit power envelope element, a maximum transmit PSD corresponding to its own BSS operating channel bandwidth.

[004] However, in a current protocol, the transmission power envelope element is designed based on a non-extremely high throughput (EHT) station. In other words, a current transmission power envelope element can Petition 870260064973, dated 01 / 07 / 2026, p. 11 / 194 2 / 92 indicate a maximum transmission PSD corresponding to a segment of small continuous bandwidths, for example, a bandwidth of 20 MHz, 40 MHz or 80 MHz, i.e., it can indicate a maximum transmission PSD corresponding to an operational channel bandwidth without EHT BSS, but it cannot indicate a maximum transmission PSD corresponding to an operational channel bandwidth of ETH BSS.

[005] To indicate the maximum transmission PSD corresponding to the operational channel bandwidth of ETH BSS, a current method consists of the AP broadcasting another element indicating the maximum transmission PSD corresponding to the operational channel bandwidth of ETH BSS. However, this method can cause confusion for the non-ETH station. For example, upon receiving an element indicating a transmission power limit of the operational channel bandwidth of ETH BSS, the non-ETH station may erroneously consider that the element is being used to replace a previously received element indicating a transmission power limit of the operational channel bandwidth of non-ETH BSS. Furthermore, this method also causes large transmission overheads.Therefore, a power indication method and a communication device are urgently needed to reduce transmission overheads when the maximum transmission PSDs corresponding to the two types of BSS operating channel bandwidths are reliably indicated. SUMMARY

[006] This application provides a power indication method and a communication device for reducing transmission overheads when maximum transmission PSDs corresponding to two types of BSS operating channel bandwidth are reliably indicated.

[007] According to a first aspect, a method is provided for Petition 870260064973, dated 01 / 07 / 2026, page 12 / 194 3 / 92 communication. The method can be performed by a transmitting end or by means of a chip or circuit configured in the transmitting end device. This is not limited to this application. For ease of description, an example where the method is performed by the transmitting end device is used below for descriptive purposes.

[008] The method may include: generating a first frame, wherein the first frame includes a first element, the first element includes N pieces of first information, the N pieces of first information respectively indicate the maximum transmission PSD power spectral densities corresponding to N fundamental channels, the first X fundamental channels in the N fundamental channels correspond to the fundamental channels in a first operational channel bandwidth of the basic services set, and a (X+1)-th fundamental channel to an N-th fundamental channel in the N fundamental channels are fundamental channels in a given bandwidth, excluding the X fundamental channels, wherein the given bandwidth is related to a value of N and a second operational channel bandwidth of the basic services set,The second operational channel bandwidth of the basic services set is different from the first operational channel bandwidth of the basic services set, N and X are positive integers, and N is greater than X; and send the first frame.

[009] Based on the technical solution, the N pieces of initial information are designed by defining the indicated bandwidth, so that the N pieces of initial information can simultaneously indicate the maximum transmission PSDs corresponding to the fundamental channels in two types of BSS operational channel bandwidth. Different types of receiving end devices, for example, both a station Petition 870260064973, dated 01 / 07 / 2026, page 13 / 194 4 / 92 of an EHT station, as well as a station without EHT, can obtain, based on the N pieces of initial information, the maximum transmission PSDs corresponding to the fundamental channels in their own BSS operational channel bandwidths. In this solution, a plurality of frame types or elements cannot be additionally defined to indicate the maximum transmission PSDs corresponding to the fundamental channels in different BSS operational channel bandwidths, so that transmission overheads are reduced when the maximum transmission PSDs corresponding to the two types of BSS operational channel bandwidths are reliably indicated.

[010] It should be noted that the difference between the first operational channel bandwidth of the basic services set and the second operational channel bandwidth of the basic services set may be as follows: The size of the first operational channel bandwidth of the basic services set is different from the size of the second operational channel bandwidth of the basic services set, or the number of fundamental channels in the first operational channel bandwidth of the basic services set is different from the number of fundamental channels in the second operational channel bandwidth of the basic services set. For example, the first operational channel bandwidth of the basic services set is 40 MHz, including two fundamental channels, and the second operational channel bandwidth of the basic services set is 320 MHz, including 16 fundamental channels.

[011] With reference to the first aspect, in some implementations of the first aspect, the fundamental channels in the second operational channel bandwidth of the basic service set include fundamental channels in the first operational channel bandwidth of the service set. Petition 870260064973, dated 01 / 07 / 2026, p. 14 / 194 5 / 92 basic.

[012] With reference to the first aspect, in some implementations of the first aspect, the first X pieces of first information in the N pieces of first information are ordered sequentially in ascending order of frequencies of the corresponding fundamental channels.

[013] With reference to the first aspect, in some implementations of the first aspect, an (X+1)-th piece of first information to an N-th piece of first information in the N pieces of first information are ordered sequentially in ascending order of frequencies of the corresponding fundamental channels.

[014] Based on the technical solution, the first information pieces are ordered so that the receiving end can determine, based on the positions of the first information pieces, the maximum transmission PSDs corresponding to the fundamental channels, and no additional bit is needed to indicate a specific match between the fundamental channels and the first information pieces, further reducing transmission overheads.

[015] With reference to the first aspect, in some implementations of the first aspect, N is equal to a first value, and the indicated bandwidth is a second operational channel bandwidth of the core services set, where the first value is a number of fundamental channels included in the second operational channel bandwidth of the core services set.

[016] With reference to the first aspect, in some implementations of the first aspect, N is less than a first value, the indicated bandwidth is Z megahertz primary in the second operational channel bandwidth of the core service set, Z is equal to N multiplied by one Petition 870260064973, dated 01 / 07 / 2026, p. 15 / 194 6 / 92 fundamental channel bandwidth, and the first value is a number of fundamental channels included in the second operational channel bandwidth of the core service set.

[017] With reference to the first aspect, in some implementations of the first aspect, N is greater than a first value, the indicated bandwidth is greater than a second operating channel bandwidth of the basic services set, the first Y pieces of first information in the N pieces of first information indicate maximum transmission PSDs corresponding to Y fundamental channels included in the second operating channel bandwidth of the basic services set, Y is a positive integer and the first value is a number of fundamental channels included in the second operating channel bandwidth of the basic services set.

[018] Based on the technical solution, the receiving end device can interpret the initial information based on different values ​​of N, to obtain the maximum transmission PSDs corresponding to the fundamental channels in its own BSS operational channel bandwidth. The indication method is flexible.

[019] With reference to the first aspect, in some implementations of the first aspect, a (Y+1)-th piece of first information to an N-th piece of first information in the N pieces of first information are reserved.

[020] With reference to the first aspect, in some implementations of the first aspect, a fundamental channel bandwidth size is 20 megahertz MHz.

[021] With reference to the first aspect, in some implementations of the first aspect, the first element additionally includes a maximum transmission power number field, and the power number field. Petition 870260064973, dated 01 / 07 / 2026, p. 16 / 194 7 / 92 of maximum transmission indicates a value of N.

[022] With reference to the first aspect, in some implementations of the first aspect, the first element additionally includes a maximum transmission power interpretation field, and a value of the maximum transmission power interpretation field is 1 or 3.

[023] With reference to the first aspect, in some implementations of the first aspect, the first element is a transmission power envelope element.

[024] With reference to the first aspect, in some implementations of the first aspect, the first basic service set operational channel bandwidth is a basic service set operational channel bandwidth without extremely high throughput EHT, and the second basic service set operational channel bandwidth is an EHT basic service set operational channel bandwidth.

[025] With reference to the first aspect, in some implementations of the first aspect, the value of N is 2 raised to the power of n, en is an integer greater than or equal to 0.

[026] According to a second aspect, a method of communication is provided. The method may be performed by a receiving end or by means of a chip or circuit configured in the receiving end device. This is not limited to this application. For ease of description, an example where the method is performed by a first receiving end device is used below for descriptive purposes.

[027] The method includes: receiving a first frame, where the first frame includes a first element, the first element includes N pieces of Petition 870260064973, dated 01 / 07 / 2026, page 17 / 194 8 / 92 first information, the N pieces of first information indicate respectively the maximum transmission PSD power spectral densities corresponding to N fundamental channels, the first X fundamental channels in the N fundamental channels correspond to the fundamental channels in a first operational channel bandwidth of the basic services set, and an (X+1)-th fundamental channel to an N-th fundamental channel in the N fundamental channels are fundamental channels in a given bandwidth, excluding the X fundamental channels, wherein the given bandwidth is related to a value of N and a second operational channel bandwidth of the basic services set, the second operational channel bandwidth of the basic services set is different from the first operational channel bandwidth of the basic services set, N and X are positive integers, and N is greater than X;and determine, based on the first table, the maximum transmission PSDs corresponding to the fundamental channels in the second operational channel bandwidth of the core services suite.

[028] The implementations of the second aspect are the methods of the first receiving end device corresponding to the implementations of the first aspect. For the technical effects of the implementations, refer to the descriptions of the first aspect. The details are not described again in the present invention.

[029] With reference to the second aspect, in some implementations of the second aspect, the fundamental channels in the second operational channel bandwidth of the core service set include fundamental channels in the first operational channel bandwidth of the core service set.

[030] With reference to the second aspect, in some implementations Petition 870260064973, dated 01 / 07 / 2026, page 18 / 194 9 / 92 of the second aspect, the first X pieces of first information in the N pieces of first information are sequentially ordered in ascending order of frequencies of the corresponding fundamental channels.

[031] With reference to the second aspect, in some implementations of the second aspect, an (X+1)-th piece of first information to an N-th piece of first information in the N pieces of first information are ordered sequentially in ascending order of frequencies of the corresponding fundamental channels.

[032] With reference to the second aspect, in some implementations of the second aspect, N is equal to a first value, and the indicated bandwidth is a second operational channel bandwidth of the core services set, where the first value is a number of fundamental channels included in the second operational channel bandwidth of the core services set.

[033] With reference to the second aspect, in some implementations of the second aspect, N is less than a first value, the indicated bandwidth is Z primary megahertz in the second operational channel bandwidth of the core services set, Z is equal to N multiplied by a fundamental channel bandwidth, and the first value is a number of fundamental channels included in the second operational channel bandwidth of the core services set.

[034] With reference to the second aspect, in some implementations of the second aspect, N is greater than a first value, the indicated bandwidth is greater than a second operational channel bandwidth of the basic services set, the first Y pieces of first information in the N pieces of first information indicate maximum transmission PSDs corresponding to Y fundamental channels included in the second bandwidth. Petition 870260064973, dated 01 / 07 / 2026, page 19 / 194 10 / 92 of the core service set operational channel, Y is a positive integer and the first value is the number of fundamental channels included in the second core service set operational channel bandwidth.

[035] With reference to the second aspect, in some implementations of the second aspect, a (Y+1)-th piece of first information to an N-th piece of first information in the N pieces of first information are reserved.

[036] With reference to the second aspect, in some implementations of the second aspect, a fundamental channel bandwidth size is 20 megahertz MHz.

[037] With reference to the second aspect, in some implementations of the second aspect, the first element additionally includes a maximum transmission power number field, and the maximum transmission power number field indicates a value of N.

[038] With reference to the second aspect, in some implementations of the second aspect, the first element additionally includes a maximum transmission power interpretation field, and a value of the maximum transmission power interpretation field is 1 or 3.

[039] With reference to the second aspect, in some implementations of the second aspect, the first element is a transmission power envelope element.

[040] With reference to the second aspect, in some implementations of the second aspect, the first basic services set operational channel bandwidth is a basic services set operational channel bandwidth without extremely high throughput (EHT), and the second basic services set operational channel bandwidth is a basic services set operational channel bandwidth Petition 870260064973, dated 01 / 07 / 2026, page 20 / 194 11 / 92 basic EHT.

[041] With reference to the second aspect, in some implementations of the second aspect, the value of N is 2 raised to the power of n, en is an integer greater than or equal to 0.

[042] With reference to the second aspect, in some implementations of the second aspect, the first receiving end device is an EHT station.

[043] According to a third aspect, a method of communication is provided. The method may be performed by a receiving end or by means of a chip or circuit configured in the receiving end device. This is not limited to this application. For ease of description, an example where the method is performed by a second receiving end device is used below for description.

[044] The method includes: receiving a first frame, wherein the first frame includes a first element, the first element includes N pieces of first information, the N pieces of first information respectively indicate the maximum transmission PSD power spectral densities corresponding to N fundamental channels, the first X fundamental channels in the N fundamental channels correspond to the fundamental channels in a first operational channel bandwidth of the basic services set, and a (X+1)-th fundamental channel to an N-th fundamental channel in the N fundamental channels are fundamental channels in a given bandwidth, excluding the X fundamental channels, wherein the given bandwidth is related to a value of N and a second operational channel bandwidth of the basic services set,The second operational channel bandwidth of the core services suite is different from the first operational channel bandwidth of the core services suite. Petition 870260064973, dated 01 / 07 / 2026, p. 21 / 194 12 / 92 N and X are positive integers, and N is greater than X; and determine, based on the first table, the maximum transmission PSDs corresponding to the fundamental channels in the first operational channel bandwidth of the basic services set.

[045] The implementations of the third aspect are the methods of the second receiving end device corresponding to the implementations of the first aspect. For the technical purposes of the implementations, refer to the descriptions of the first aspect. The details are not described again in the present invention.

[046] With reference to the third aspect, in some implementations of the third aspect, the fundamental channels in the second operational channel bandwidth of the core service set include fundamental channels in the first operational channel bandwidth of the core service set.

[047] With reference to the third aspect, in some implementations of the third aspect, the first X pieces of first information in the N pieces of first information are ordered sequentially in ascending order of frequencies of the corresponding fundamental channels.

[048] With reference to the third aspect, in some implementations of the third aspect, an (X+1)-th piece of first information to an N-th piece of first information in the N pieces of first information are ordered sequentially in ascending order of frequencies of the corresponding fundamental channels.

[049] With reference to the third aspect, in some implementations of the third aspect, N is equal to a first value, and the indicated bandwidth is a second operational channel bandwidth of the core service set, where the first value is a number of fundamental channels included. Petition 870260064973, dated 01 / 07 / 2026, p. 22 / 194 13 / 92 in the second operational channel bandwidth of the core services suite.

[050] With reference to the third aspect, in some implementations of the third aspect, N is less than a first value, the indicated bandwidth is Z primary megahertz in the second operational channel bandwidth of the core services set, Z is equal to N multiplied by a fundamental channel bandwidth, and the first value is a number of fundamental channels included in the second operational channel bandwidth of the core services set.

[051] With reference to the third aspect, in some implementations of the third aspect, N is greater than a first value, the indicated bandwidth is greater than a second operating channel bandwidth of the basic services set, the first Y pieces of first information in the N pieces of first information indicate maximum transmission PSDs corresponding to Y fundamental channels included in the second operating channel bandwidth of the basic services set, Y is a positive integer and the first value is a number of fundamental channels included in the second operating channel bandwidth of the basic services set.

[052] With reference to the third aspect, in some implementations of the third aspect, a (Y+1)-th piece of first information to an N-th piece of first information in the N pieces of first information are reserved.

[053] With reference to the third aspect, in some implementations of the third aspect, a fundamental channel bandwidth size is 20 megahertz MHz.

[054] With reference to the third aspect, in some implementations of the third aspect, the first element additionally includes a field of Petition 870260064973, dated 01 / 07 / 2026, p. 23 / 194 14 / 92 maximum transmission power number, and the maximum transmission power number field indicates a value of N.

[055] With reference to the third aspect, in some implementations of the third aspect, the first element additionally includes a maximum transmission power interpretation field, and a value of the maximum transmission power interpretation field is 1 or 3.

[056] With reference to the third aspect, in some implementations of the third aspect, the first element is a transmission power envelope element.

[057] With reference to the third aspect, in some implementations of the third aspect, the first basic service set operational channel bandwidth is a basic service set operational channel bandwidth without extremely high throughput EHT, and the second basic service set operational channel bandwidth is an EHT basic service set operational channel bandwidth.

[058] With reference to the third aspect, in some implementations of the third aspect, the value of N is 2 raised to the power of n, en is an integer greater than or equal to 0.

[059] With reference to the third aspect, in some implementations of the third aspect, the second receiving end device is a non-EHT station.

[060] According to a fourth aspect, a method of communication is provided. The method may be performed by a transmitting end or by means of a chip or circuit configured in the transmitting end device. This is not limited to this application. For ease of description, an example where the method is performed by the device is Petition 870260064973, dated 01 / 07 / 2026, page 24 / 194 The 15 / 92 transmission end is used below for description.

[061] The method includes: generating a first frame, wherein the first frame includes a first element, the first element includes P pieces of first information and Q pieces of second information, the P pieces of first information respectively indicate the maximum transmission power spectral densities (PSDs) corresponding to P fundamental channels, the P fundamental channels are some or all of the fundamental channels in a first operational channel bandwidth of the basic services set, the Q pieces of second information respectively indicate the maximum transmission PSDs corresponding to the fundamental channels in a given bandwidth, excluding P fundamental channels, and P and Q are positive integers;The indicated bandwidth is related to a value of M and a second operational channel bandwidth of the basic services set; the second operational channel bandwidth of the basic services set is different from the first operational channel bandwidth of the basic services set; M is equal to the sum of P and Q, and M is a positive integer; and the first element additionally includes third and fourth information, the third information indicates a value of P, and the fourth information indicates a value of Q; and send the first frame.

[062] Based on the technical solution, the P pieces of first information are defined to indicate the maximum transmission PSDs corresponding to some or all of the fundamental channels in the first operational channel bandwidth of BSS, and the Q pieces of second information are defined by projecting the indicated bandwidth, so that the P pieces of first information and the Q pieces of second information can indicate the maximum transmission PSDs corresponding to some or all of the Petition 870260064973, dated 01 / 07 / 2026, page 25 / 194 16 / 92 fundamental channels in the second operational BSS channel bandwidth, so that different types of receiving end devices, for example, an EHT station and a non-EHT station, can obtain, based on the first element, the maximum transmission PSDs corresponding to the fundamental channels in their own operational BSS channel bandwidths. In this solution, a plurality of frame types or elements cannot be additionally defined to indicate the maximum transmission PSDs corresponding to the fundamental channels in different operational BSS channel bandwidths, so that transmission overheads are reduced when the maximum transmission PSDs corresponding to the two types of operational BSS channel bandwidths are reliably indicated.Furthermore, the value of P is indicated based on third-party information, and the design of first-party information is more flexible; that is, the way of indicating the first operational channel bandwidth of BSS is more flexible.

[063] With reference to the fourth aspect, in some implementations of the fourth aspect, the fundamental channels in the second operational channel bandwidth of the core service set include the fundamental channels in the first operational channel bandwidth of the core service set.

[064] With reference to the fourth aspect, in some implementations of the fourth aspect, the P pieces of first information are ordered sequentially in ascending order of frequencies of the corresponding fundamental channels.

[065] With reference to the fourth aspect, in some implementations of the fourth aspect, the Q pieces of second information are ordered sequentially in ascending order of frequencies of the corresponding fundamental channels. Petition 870260064973, dated 01 / 07 / 2026, page 26 / 194 17 / 92

[066] Based on the technical solution, the first information pieces and the second information pieces are ordered separately, so that the receiving end can determine, based on the positions of the first information pieces and the second information pieces, the maximum transmission PSDs corresponding to the fundamental channels, and no additional bit is needed to indicate a specific correspondence between the fundamental channels and the information pieces, further reducing transmission overheads.

[067] With reference to the fourth aspect, in some implementations of the fourth aspect, M equals a first value, the indicated bandwidth is the second operational channel bandwidth of the core services set, and the first value is a number of fundamental channels included in the second operational channel bandwidth of the core services set.

[068] With reference to the fourth aspect, in some implementations of the fourth aspect, M is less than a first value, the indicated bandwidth is Z primary megahertz in the second operational channel bandwidth of the basic services set, Z is equal to M multiplied by a fundamental channel bandwidth, and the first value is a number of fundamental channels included in the second operational channel bandwidth of the basic services set.

[069] With reference to the fourth aspect, in some implementations of the fourth aspect, M is greater than a first value, the indicated bandwidth is greater than the second operational channel bandwidth of the basic services set, the first S pieces of information in M ​​pieces of information in the total of the P pieces of information of first information and the Q pieces of second information indicate, respectively, the maximum transmission PSDs corresponding to S fundamental channels included in Petition 870260064973, dated 01 / 07 / 2026, page 27 / 194 18 / 92 second operational channel bandwidth of the basic services set, S is a positive integer, the first value is a number of fundamental channels included in the second operational channel bandwidth of the basic services set, and S is greater than P.

[070] Based on the technical solution, the receiving end device can interpret the initial information based on different values ​​of N, to obtain the maximum transmission PSDs corresponding to the fundamental channels in its own BSS operational channel bandwidth. The indication method is flexible.

[071] With reference to the fourth aspect, in some implementations of the fourth aspect, an (S+1)-th piece of information to an (P+Q)-th piece of information in the total M pieces of information of the P pieces of first information and the Q pieces of second information are reserved.

[072] With reference to the fourth aspect, in some fourth-aspect implementations, a fundamental channel bandwidth size is 20 megahertz MHz.

[073] With reference to the fourth aspect, in some implementations of the fourth aspect, the first element additionally includes a maximum transmission power interpretation field, and a value of the maximum transmission power interpretation field is 1 or 3.

[074] With reference to the fourth aspect, in some implementations of the fourth aspect, the first element is a transmission power envelope element.

[075] With reference to the fourth aspect, in some implementations of the fourth aspect, the first core service set operational channel bandwidth is a core service set operational channel bandwidth without extremely high throughput EHT, and the second Petition 870260064973, dated 01 / 07 / 2026, p. 28 / 194 19 / 92 core service set operational channel bandwidth is a core service set operational channel bandwidth for EHT.

[076] With reference to the fourth aspect, in some implementations of the fourth aspect, the value of M is 2 raised to the power of m, where is an integer greater than or equal to 0.

[077] According to a fifth aspect, a method of communication is provided. The method may be performed by a receiving end or by means of a chip or circuit configured in the receiving end device. This is not limited to this application. For ease of description, an example where the method is performed by a first receiving end device is used below for descriptive purposes.

[078] The method includes: receiving a first frame, wherein the first frame includes a first element, the first element includes P pieces of first information and Q pieces of second information, the P pieces of first information indicate, respectively, the maximum transmission power spectral densities PSDs corresponding to P fundamental channels, the P fundamental channels are some or all of the fundamental channels in a first operational channel bandwidth of the basic services set, the Q pieces of second information indicate, respectively, the maximum transmission PSDs corresponding to the fundamental channels in a given bandwidth, excluding the P fundamental channels, and P and Q are positive integers; the first element additionally includes third information and fourth information, the third information indicates a value of P, and the fourth information indicates a value of Q;and the indicated bandwidth is related to a value of M and a second operational channel bandwidth of the basic services set; Petition 870260064973, dated 01 / 07 / 2026, page 29 / 194 20 / 92 the second operational channel bandwidth of the basic services set is different from the first operational channel bandwidth of the basic services set, M is equal to the sum of P and Q, and M is a positive integer; and determine, based on the first frame, the maximum transmission PSDs corresponding to the fundamental channels in the second operational channel bandwidth of the basic services set.

[079] With reference to the fifth aspect, in some implementations of the fifth aspect, the fundamental channels in the second operational channel bandwidth of the core service set include the fundamental channels in the first operational channel bandwidth of the core service set.

[080] With reference to the fifth aspect, in some implementations of the fifth aspect, the P pieces of first information are ordered sequentially in ascending order of frequencies of the corresponding fundamental channels.

[081] With reference to the fifth aspect, in some implementations of the fifth aspect, the second information Q chunks are ordered sequentially in ascending order of frequencies of the corresponding fundamental channels.

[082] With reference to the fifth aspect, in some implementations of the fifth aspect, M equals a first value, the indicated bandwidth is the second operational channel bandwidth of the core services set, and the first value is a number of fundamental channels included in the second operational channel bandwidth of the core services set.

[083] With reference to the fifth aspect, in some implementations of the fifth aspect, M is less than a first value, the indicated bandwidth is Z megahertz primary in the second operational channel bandwidth of the core service set, Z is equal to M multiplied by a bandwidth Petition 870260064973, dated 01 / 07 / 2026, p. 30 / 194 21 / 92 fundamental channel bandwidth, and the first value is a number of fundamental channels included in the second operational channel bandwidth of the core services suite.

[084] With reference to the fifth aspect, in some implementations of the fifth aspect, M is greater than a first value, the indicated bandwidth is greater than the second operational channel bandwidth of the basic services set, the first S pieces of information in M ​​pieces of information in the total of the P pieces of information of first information and the Q pieces of second information indicate, respectively, the maximum transmission PSDs corresponding to S fundamental channels included in the second operational channel bandwidth of the basic services set, S is a positive integer, the first value is a number of fundamental channels included in the second operational channel bandwidth of the basic services set and S is greater than P.

[085] With reference to the fifth aspect, in some implementations of the fifth aspect, an (S+1)-th piece of information to an (P+Q)-th piece of information in the total M pieces of information of the P pieces of first information and the Q pieces of second information are reserved.

[086] With reference to the fifth aspect, in some implementations of the fifth aspect, a fundamental channel bandwidth size is 20 megahertz MHz.

[087] With reference to the fifth aspect, in some implementations of the fifth aspect, the first element additionally includes a maximum transmission power interpretation field, and a value of the maximum transmission power interpretation field is 1 or 3.

[088] With reference to the fifth aspect, in some implementations of the fifth aspect, the first element is a power envelope element. Petition 870260064973, dated 01 / 07 / 2026, p. 31 / 194 22 / 92 transmission.

[089] With reference to the fifth aspect, in some implementations of the fifth aspect, the first basic service set operational channel bandwidth is a basic service set operational channel bandwidth without extremely high throughput EHT, and the second basic service set operational channel bandwidth is an EHT basic service set operational channel bandwidth.

[090] With reference to the fifth aspect, in some implementations of the fifth aspect, the value of M is 2 raised to the power of m, where is an integer greater than or equal to 0.

[091] With reference to the fifth aspect, in some implementations of the fifth aspect, the first receiving endpoint device is an EHT station.

[092] According to a sixth aspect, a method of communication is provided. The method may be performed by a receiving end or by means of a chip or circuit configured in the receiving end device. This is not limited to this application. For ease of description, an example where the method is performed by a second receiving end device is presented below.

[093] The method includes: receiving a first frame, wherein the first frame includes a first element, the first element includes P pieces of first information and Q pieces of second information, the P pieces of first information indicate, respectively, the maximum transmission power spectral densities (PSDs) corresponding to P fundamental channels, the P fundamental channels are some or all of the fundamental channels in a first operational channel bandwidth of the basic services set, the Q pieces of second information indicate, Petition 870260064973, dated 01 / 07 / 2026, page 32 / 194 23 / 92 respectively, the maximum transmission PSDs corresponding to the fundamental channels in a given bandwidth, excluding the P fundamental channels, and P and Q are positive integers; the first element additionally includes the third and fourth pieces of information, the third pieces of information indicate a value of P, and the fourth pieces of information indicate a value of Q; and the given bandwidth is related to a value of M and a second operational channel bandwidth of the basic service set, the second operational channel bandwidth of the basic service set is different from the first operational channel bandwidth of the basic service set, M is equal to the sum of P and Q, and M is a positive integer; and determine, based on the first frame, the maximum transmission PSDs corresponding to the fundamental channels in a first operational channel of the basic service set.

[094] With reference to the sixth aspect, in some implementations of the sixth aspect, the fundamental channels in the second operational channel bandwidth of the core service set include the fundamental channels in the first operational channel bandwidth of the core service set.

[095] With reference to the sixth aspect, in some implementations of the sixth aspect, the P pieces of first information are ordered sequentially in ascending order of frequencies of the corresponding fundamental channels.

[096] With reference to the sixth aspect, in some implementations of the sixth aspect, the second information Q chunks are ordered sequentially in ascending order of frequencies of the corresponding fundamental channels.

[097] With reference to the sixth aspect, in some implementations of the sixth aspect, M is equal to a first value, the indicated bandwidth is the Petition 870260064973, dated 01 / 07 / 2026, p. 33 / 194 24 / 92 is the second operational channel bandwidth of the core services suite, and the first value is the number of fundamental channels included in the second operational channel bandwidth of the core services suite.

[098] With reference to the sixth aspect, in some implementations of the sixth aspect, M is less than a first value, the indicated bandwidth is Z primary megahertz in the second operational channel bandwidth of the basic services set, Z is equal to M multiplied by a fundamental channel bandwidth, and the first value is a number of fundamental channels included in the second operational channel bandwidth of the basic services set.

[099] With reference to the sixth aspect, in some implementations of the sixth aspect, M is greater than a first value, the indicated bandwidth is greater than the second operational channel bandwidth of the basic services set, the first S pieces of information in M ​​pieces of information in the total of the P pieces of information of first information and the Q pieces of second information indicate, respectively, the maximum transmission PSDs corresponding to S fundamental channels included in the second operational channel bandwidth of the basic services set, S is a positive integer, the first value is a number of fundamental channels included in the second operational channel bandwidth of the basic services set and S is greater than P.

[100] With reference to the sixth aspect, in some implementations of the sixth aspect, an (S+1)-th piece of information to an (P+Q)-th piece of information in the total M pieces of information of the P pieces of first information and the Q pieces of second information are reserved.

[101] With reference to the sixth aspect, in some implementations of the sixth aspect, a fundamental channel bandwidth size is 20 Petition 870260064973, dated 01 / 07 / 2026, p. 34 / 194 25 / 92 megahertz MHz.

[102] With reference to the sixth aspect, in some implementations of the sixth aspect, the first element additionally includes a maximum transmission power interpretation field, and a value of the maximum transmission power interpretation field is 1 or 3.

[103] With reference to the sixth aspect, in some implementations of the sixth aspect, the first element is a transmission power envelope element.

[104] With reference to the sixth aspect, in some implementations of the sixth aspect, the first basic service set operational channel bandwidth is a basic service set operational channel bandwidth without extremely high throughput EHT, and the second basic service set operational channel bandwidth is an EHT basic service set operational channel bandwidth.

[105] With reference to the sixth aspect, in some implementations of the sixth aspect, the value of M is 2 raised to the power of m, where is an integer greater than or equal to 0.

[106] With reference to the sixth aspect, in some implementations of the sixth aspect, the first receiving end device is an EHT station.

[107] According to a seventh aspect, a communication apparatus is provided. The communication apparatus includes a processing unit and a communication unit. The processing unit is configured to generate a first frame, where the first frame includes a first element, the first element includes N pieces of first information, the N pieces of first information indicate, respectively, the maximum transmission power spectral densities (PSDs) corresponding to N Petition 870260064973, dated 01 / 07 / 2026, p. 35 / 194 26 / 92 fundamental channels, the first X fundamental channels in the N fundamental channels correspond to the fundamental channels in a first operational channel bandwidth basic service set, and a (X+1)-th fundamental channel to an N-th fundamental channel in the N fundamental channels are fundamental channels in a given bandwidth, excluding the X fundamental channels, where the given bandwidth is related to a value of N and a second operational channel bandwidth basic service set, the second operational channel bandwidth basic service set is different from the first operational channel bandwidth basic service set, N and X are positive integers and N is greater than X. The communication unit is configured to send the first frame.

[108] The seventh aspect implementations are the communication apparatus corresponding to the first aspect implementations. The communication apparatus provided in the seventh aspect can perform any of the first aspect aspects and the possible first aspect implementations.

[109] According to an eighth aspect, a communication apparatus is provided. The communication apparatus includes a communication unit and a processing unit. The communication unit is configured to receive a first frame, wherein the first frame includes a first element, the first element includes N pieces of first information, the N pieces of first information indicate, respectively, the maximum transmission power spectral densities PSDs corresponding to N fundamental channels, the first X fundamental channels in the N fundamental channels correspond to fundamental channels in a first operational channel bandwidth of basic services set, and an (X+1)-th fundamental channel to an N-th fundamental channel in the N fundamental channels Petition 870260064973, dated 01 / 07 / 2026, p. 36 / 194 27 / 92 are fundamental channels in a given bandwidth, excluding the X fundamental channels, wherein the indicated bandwidth is related to a value of N and a second operational channel bandwidth of the basic services set, the second operational channel bandwidth of the basic services set is different from the first operational channel bandwidth of the basic services set, N and X are positive integers and N is greater than X. The processing unit is configured to determine, based on the first frame, the maximum transmission PSDs corresponding to fundamental channels in the second operational channel bandwidth of the basic services set.

[110] The implementations of the eighth aspect are the communication apparatus corresponding to the implementations of the second aspect. The communication apparatus provided in the eighth aspect can perform either of the two aspects, as well as the possible implementations of the second aspect.

[111] According to a ninth aspect, a communication apparatus is provided. The communication apparatus includes a communication unit and a processing unit. The communication unit is configured to receive a first frame, wherein the first frame includes a first element, the first element includes N pieces of first information, the N pieces of first information indicate, respectively, the maximum transmission power spectral densities PSDs corresponding to N fundamental channels, the first X fundamental channels in the N fundamental channels correspond to fundamental channels in a first operational channel bandwidth of the basic services set, and a (X+1)-th fundamental channel to an N-th fundamental channel in the N fundamental channels are fundamental channels in a given bandwidth, excluding the X Petition 870260064973, dated 01 / 07 / 2026, p. 37 / 194 28 / 92 fundamental channels, where the indicated bandwidth is related to a value of N and a second operational channel bandwidth of the basic services set, the second operational channel bandwidth of the basic services set is different from the first operational channel bandwidth of the basic services set, N and X are positive integers and N is greater than X. The processing unit is configured to determine, based on the first frame, the maximum transmission PSDs corresponding to the fundamental channels in the first operational channel bandwidth of the basic services set.

[112] The ninth aspect implementations are the communication apparatus corresponding to the third aspect implementations. The communication apparatus provided in the ninth aspect can perform any of the third aspect aspects and the possible third aspect implementations.

[113] According to a tenth aspect, a communication apparatus is provided. The communication apparatus includes a processing unit and a communication unit. The processing unit is configured to generate a first frame, wherein the first frame includes a first element, the first element includes P pieces of first information and Q pieces of second information, the P pieces of first information indicate, respectively, the maximum transmission power spectral densities (PSDs) corresponding to P fundamental channels, the P fundamental channels are some or all of the fundamental channels in a first operational channel bandwidth of the basic services set, the Q pieces of second information indicate, respectively, the maximum transmission PSDs corresponding to the fundamental channels in a given bandwidth, excluding the P fundamental channels, and P and Q are numbers Petition 870260064973, dated 01 / 07 / 2026, page 38 / 194 29 / 92 positive integers; the first element additionally includes the third and fourth pieces of information, the third pieces of information indicating a value of P, and the fourth pieces of information indicating a value of Q; and the indicated bandwidth is related to a value of M and a second operating channel bandwidth of the basic service set, the second operating channel bandwidth of the basic service set is different from the first operating channel bandwidth of the basic service set, M is equal to the sum of P and Q, and M is a positive integer. The communication unit is configured to send the first frame.

[114] The tenth aspect implementations are the communication apparatus corresponding to the fourth aspect implementations. The communication apparatus provided in the tenth aspect can perform any of the fourth aspect and the possible fourth aspect implementations.

[115] According to an eleventh aspect, a communication apparatus is provided. The communication apparatus includes a communication unit and a processing unit.The communication unit receives a first frame, wherein the first frame includes a first element, the first element includes P pieces of first information and Q pieces of second information, the P pieces of first information indicate, respectively, the maximum transmission power spectral densities (PSDs) corresponding to P fundamental channels, the P fundamental channels are some or all of the fundamental channels in a first operational channel bandwidth of the basic service set, the Q pieces of second information indicate, respectively, the maximum transmission PSDs corresponding to the fundamental channels in a given bandwidth, excluding the P fundamental channels, and P and Q are positive integers; the first element additionally includes thirds. Petition 870260064973, dated 01 / 07 / 2026, p. 39 / 194 30 / 92 information and the fourth information, the third information indicates a value of P, and the fourth information indicates a value of Q; and the indicated bandwidth is related to a value of M and a second operational channel bandwidth of the basic services set, the second operational channel bandwidth of the basic services set is different from the first operational channel bandwidth of the basic services set, M is equal to the sum of P and Q, and M is a positive integer. The processing unit is configured to determine, based on the first frame, the maximum transmission PSDs corresponding to the fundamental channels in the second operational channel bandwidth of the basic services set.

[116] Implementations of the eleventh aspect are the communication apparatus corresponding to the implementations of the fifth aspect. The communication apparatus provided in the eleventh aspect can perform any of the implementations of the fifth aspect and the possible implementations of the fifth aspect.

[117] According to a twelfth aspect, a communication apparatus is provided. The communication apparatus includes a communication unit and a processing unit. The communication unit receives a first frame, wherein the first frame includes a first element, the first element includes P pieces of first information and Q pieces of second information, the P pieces of first information indicate, respectively, the maximum transmission power spectral densities (PSDs) corresponding to P fundamental channels, the P fundamental channels are some or all of the fundamental channels in a first operational channel bandwidth of the basic services set, the Q pieces of second information indicate, respectively, the maximum transmission PSDs corresponding to the fundamental channels in a bandwidth Petition 870260064973, dated 01 / 07 / 2026, p. 40 / 194 31 / 92 of indicated bandwidth, excluding the P fundamental channels, and P and Q are positive integers; the first element additionally includes the third and fourth information, the third information indicates a value of P, and the fourth information indicates a value of Q; and the indicated bandwidth is related to a value of M and a second operational channel bandwidth of the basic service set, the second operational channel bandwidth of the basic service set is different from the first operational channel bandwidth of the basic service set, M is equal to the sum of P and Q, and M is a positive integer. The processing unit is configured to determine, based on the first frame, the maximum transmission PSDs corresponding to the fundamental channels in the first operational channel bandwidth of the basic service set.

[118] Implementations of the twelfth aspect are the communication apparatus corresponding to the implementations of the sixth aspect. The communication apparatus provided in the twelfth aspect can perform any of the implementations of the sixth aspect and the possible implementations of the sixth aspect.

[119] According to a thirteenth aspect, a communication apparatus is provided. The communication apparatus is configured to perform the method provided in the first aspect or in the fourth aspect. Specifically, the apparatus may include a module configured to perform either of the first aspect and possible implementations of the first aspect or either of the fourth aspect and possible implementations of the fourth aspect.

[120] According to a fourteenth aspect, a communication apparatus is provided. The apparatus is configured to perform the method provided in the second aspect or the fifth aspect. Specifically, the apparatus Petition 870260064973, dated 01 / 07 / 2026, p. 41 / 194 32 / 92 may include a module configured to perform either of the second aspect and its possible implementations, or either of the fifth aspect and its possible implementations.

[121] According to a fifteenth aspect, a communication apparatus is provided. The apparatus is configured to indicate the method provided in the third aspect or the sixth aspect. Specifically, the apparatus may include a module configured to perform either of the third aspect and possible implementations of the third aspect or either of the sixth aspect and possible implementations of the sixth aspect.

[122] According to a sixteenth aspect, a communication apparatus, including a processor, is provided. The processor is memory coupled and can be configured to execute instructions in memory, implement the method in any of the first aspect and possible implementations of the first aspect, or implement the method in any of the fourth aspect and possible implementations of the fourth aspect. Optionally, the apparatus additionally includes memory. Optionally, the device additionally includes a communication interface, and the processor is coupled to the communication interface.

[123] In one implementation, the device is a transmit-end device. When the device is the transmit-end device, the communication interface can be a transceiver or an input / output interface.

[124] In another implementation, the device is a chip configured in a transmit-end device. When the device is a chip configured in the transmit-end device, the communication interface can be a transceiver or an input / output interface. Petition 870260064973, dated 01 / 07 / 2026, page 42 / 194 33 / 92

[125] In another implementation, the device is a chip or a system of chips.

[126] Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[127] According to a seventeenth aspect, a communication apparatus, including a processor, is provided. The processor may be configured to execute instructions in memory, implement the method in any of the second aspect and the possible implementations of the second aspect, or implement the method in any of the fifth aspect and the possible implementations of the fifth aspect. Optionally, the apparatus additionally includes memory. Optionally, the device additionally includes a communication interface, and the processor is coupled to the communication interface.

[128] In one implementation, the device is a receiving end device. When the device is the receiving end device, the communication interface can be a transceiver or an input / output interface.

[129] In another implementation, the device is a chip configured in a receiving end device. When the device is a chip configured in the receiving end device, the communication interface can be an input / output interface.

[130] In another implementation, the device is a chip or a system of chips.

[131] Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit. Petition 870260064973, dated 01 / 07 / 2026, page 43 / 194 34 / 92

[132] According to an eighteenth aspect, a communication apparatus, including a processor, is provided. The processor may be configured to execute instructions in memory, implement the method in any of the aspects of the third aspect and the possible implementations of the third aspect, or implement the method in any of the aspects of the sixth aspect and the possible implementations of the sixth aspect. Optionally, the apparatus additionally includes memory. Optionally, the device additionally includes a communication interface, and the processor is coupled to the communication interface.

[133] In one implementation, the device is a receiving end device. When the device is the receiving end device, the communication interface can be a transceiver or an input / output interface.

[134] In another implementation, the device is a chip configured in a receiving end device. When the device is a chip configured in the receiving end device, the communication interface can be an input / output interface.

[135] In another implementation, the device is a chip or a system of chips.

[136] Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[137] According to a nineteenth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores computer instructions and, when the computer instructions are executed by an apparatus, the apparatus is enabled to implement the method in any of the first to sixth aspects and in Petition 870260064973, dated 01 / 07 / 2026, page 44 / 194 35 / 92 any of the possible implementations of the first through sixth aspects.

[138] According to a twentieth aspect, a computer program product is provided including instructions. The computer program product includes a computer program and, when the computer program is executed by an apparatus, the apparatus is enabled to implement the method provided in any of the first to sixth aspects and in any of the possible implementations of the first to sixth aspects.

[139] According to a twenty-first aspect, a communication system is provided, including the transmitting end device, the first receiving end device and the second receiving end device described above.

[140] Optionally, the first receiving end device is a non-EHT station, and the second receiving end device is an EHT station. BRIEF DESCRIPTION OF THE DRAWINGS

[141] Figure 1 is a diagram of an application scenario to which a modality of this request is applicable; Figure 2 is a schematic flowchart of a power indication method according to one embodiment of this request; Figure 3 is a diagram of a first element structure according to one embodiment of this request; Figure 4 is a diagram of a specified bandwidth according to one embodiment of this application; Figure 5 is a diagram of a second element structure according to one embodiment of this request; Figure 6 is a schematic flowchart of another method of indicating power according to one embodiment of this request; Petition 870260064973, dated 01 / 07 / 2026, page 45 / 194 36 / 92 Figure 7 is a diagram of another indicated bandwidth according to an embodiment of this application; and Figures 8 to 10 are diagrams of a possible communication device structure according to one embodiment of this application. DESCRIPTION OF THE MODALITIES

[142] The following describes technical solutions for this application with reference to the attached drawings.

[143] The technical solutions provided in the modalities of this application are applicable to a wireless local area network (WLAN) scenario. For example, standards related to IEEE 802.11 are supported, such as the 802.11a / b / g standard, the 802.11n standard, the 802.11ac standard, the 802.11ax standard, a next-generation Wi-Fi protocol of IEEE 802.11ax, for example, 802.11be, Wi-Fi 7, extremely high throughput (EHT), 802.11ad, 802.11ay or 802.11bf, a next-generation protocol of 802.11be, for example, Wi-Fi 8. The technical solutions provided in the embodiments of this application can be additionally applied to an ultra-wideband (UWB) based wireless personal area network system, for example, the 802.15 series standards, or can be additionally applied to a sensor-based sensing system, for example, the 802.15 series standards. 802.11bf. The 802.11n standard is called high throughput (HT), the 802.11ac is called very high throughput (VHT), the 802.11ax standard is called high efficiency (HE), and the 802.11be standard is called extremely high throughput (EHT). The 802.11bf standard includes two main categories of standards: one low frequency (sub-7 GHz) and one high frequency (60 GHz). Sub-7 GHz is mainly implemented based on standards such as 802.11ac, 802.11ax, 802.11be, and a next standard. Petition 870260064973, dated 01 / 07 / 2026, page 46 / 194 37 / 92 generation of 802.11be. 60 GHz is implemented primarily based on standards such as 802.11ad, 802.11ay, and a next-generation standard, 802.11ay. 802.11ad can also be called the directional multi-gigabit standard (DMG), and 802.11ay can also be called the enhanced directional multi-gigabit standard (EDMG).

[144] Although the embodiments of this application are described primarily by means of an example of a WLAN network deployment, especially a network to which the IEEE 802.11 system standards are applied, a practitioner in the field will readily understand that several aspects of the embodiments of this application can be extended to other networks using various standards or protocols, for example, a high-performance radio local area network (HIPERLAN), a wireless wide area network (WWAN), a wireless personal area network (WPAN), or other networks known or to be developed in the future. Therefore, regardless of the coverage area used and the wireless access protocol used, the various aspects provided in the embodiments of this application are applicable to any suitable wireless network.

[145] The technical solutions in embodiments of this application may additionally be applied to various communication systems, for example, a WLAN communication system, a wireless fidelity (Wi-Fi) system, a long-term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a universal mobile telecommunications system (UMTS), a communication system of Petition 870260064973, dated 01 / 07 / 2026, page 47 / 194 38 / 92 worldwide interoperability for microwave access (WiMAX), a fifth-generation (5G) or new radio (NR) system, a future sixth-generation (6G) system, the Internet of Things (IoT) network, or vehicle-to-everything (V2X).

[146] The communication system to which this application applies is merely an example for description, and the communication system to which this application applies is not limited to it. It is described collectively in the present invention. The details are not described again below.

[147] Figure 1 is a diagram of an application scenario to which one embodiment of this request is applicable. As shown in Figure 1, a resource configuration method provided in this request is applicable to data communication between stations (STAs). The station can be an access point (AP) or it can be a non-access point station (non-AP STA). The access point station and the non-access point station are briefly referred to as AP and non-AP station, respectively. Specifically, the solutions in this request are applicable to data communication between an AP and one or more non-AP stations (e.g., data communication between an AP 1 and a non-AP STA 1 and a non-AP STA 2), and are also applicable to data communication between APs (e.g., data communication between an AP 1 and an AP 2) and data communication between non-AP STAs (e.g., data communication between a non-AP STA 2 and a non-AP STA 3).

[148] An access point can be an access point used by a terminal (e.g., a mobile phone) to access a wired (or wireless) network and is primarily deployed in homes, buildings, and universities. A typical coverage radius is tens of meters or more than 100 meters. The Petition 870260064973, dated 01 / 07 / 2026, page 48 / 194 The 39 / 92 access point can also be deployed in outdoor environments. The access point is equivalent to a bridge that connects a wired network and a wireless network. One of the main functions of the access point is to connect multiple wireless network clients and then connect the wireless network to Ethernet.

[149] Specifically, the access point may be a terminal or a network device with a Wi-Fi chip. The network device may be a server, a router, a switch, a bridge, a computer, a mobile phone, a relay station, a vehicle-mounted device, a wearable device, a network device in a 5G network, a network device in a future 6G network, a network device in a public land mobile network (PLMN), or similar. This is not limited to the embodiments of this application. The access point can be a device compatible with a Wi-Fi standard. For example, the access point may alternatively support one or more standards from the Institute of Electrical and Electronics Engineers (IEEE) 802.11 family, such as 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11ad, and 802.11ay.

[150] The non-AP station may be a wireless communication chip, a wireless sensor, a wireless communication terminal or similar, and may also be called a user, user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user appliance. The non-AP station may be a mobile phone, a cordless phone, a phone with session initiation protocol (SIP), a wireless local loop (WLL) station, a personal digital assistant (PDA), a portable device with wireless communication function, a computing device, other device of Petition 870260064973, dated 01 / 07 / 2026, page 49 / 194 40 / 92 processing connected to a wireless modem, a vehicle-mounted device, an Internet of Things device, a wearable device, a terminal device on a 5G network, a terminal device on a future 6G network, a terminal device on a PLMN, or similar. This is not limited to the modalities of this application. The non-AP station may be a device compliant with a WLAN standard. For example, the non-AP station may be compliant with one or more standards from the IEEE 802.11 family, such as 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11ad, and 802.11ay.

[151] For example, the non-AP station can be a mobile phone, a tablet computer, a signal converter, a smart television, a smart wearable device, a vehicle-mounted communication device, a computer, an Internet of Things (IoT) node, a sensor, a smart camera, a smart remote control, or a smart water / electricity meter in a smart home and a sensor in a smart city.

[152] The AP or non-AP station may include a transmitter, a receiver, a memory, a processor, and the like. The transmitter and receiver are configured, respectively, to send and receive packet structures. The memory is configured to store signaling information, store a previously agreed-upon preset value, and the like. The processor is configured to parse the signaling information, process related data, and the like.

[153] The communication system to which this application applies is merely an example for description, and the communication system to which this application applies is not limited to it. It is described collectively in the present invention. The details are not described again below.

[154] To facilitate understanding of the modalities of this request, the Petition 870260064973, dated 01 / 07 / 2026, p. 50 / 194 Section 41 / 92 below first describes several nouns or terms in this application. 1. Basic Services Set (BSS)

[155] A BSS is used to describe a group of devices that can communicate with each other on a WLAN. A WLAN can include a plurality of BSSs. A BSS can include a plurality of stations (station, STA). The station can be an AP or a non-AP STA. Optionally, a BSS can include an AP and a plurality of non-AP STAs associated with the AP. 2. Fundamental channel

[156] The fundamental channel can be a channel with a bandwidth of 20 megahertz (MHz) in a current standard. An operational BSS channel bandwidth can be formed by one or more fundamental 20 MHz channels. For example, an operational BSS channel with a channel bandwidth of 160 MHz can include eight consecutive fundamental channels.

[157] In a current protocol, a plurality of fundamental channels in a BSS operating channel bandwidth can be used to transmit data jointly in order to implement a larger channel bandwidth. For example, a BSS operating channel bandwidth includes a 20 MHz primary channel (Primary 20 MHz, P20), a 20 MHz secondary channel (Secondary 20 MHz, S20), a 40 MHz secondary channel (Secondary 40 MHz, S40), an 80 MHz secondary channel (Secondary 80 MHz, S80) or a 160 MHz secondary channel (Secondary 160 MHz, S160). The 20 MHz primary channel and the 20 MHz secondary channel can form a 40 MHz primary channel, the 20 MHz primary channel, the 20 MHz secondary channel, and the 40 MHz secondary channel can form an 80 MHz primary channel, and the 20 MHz primary channel, the 20 MHz secondary channel, the 40 MHz secondary channel, and the 80 MHz secondary channel can form a 160 MHz primary channel. Petition 870260064973, dated 01 / 07 / 2026, page 51 / 194 42 / 92

[158] In the current protocol, to avoid interference with another station operating in a 5 GHz or 6 GHz frequency band, a BSS operational channel bandwidth can support static puncturing, i.e., one or more fundamental channels in the BSS operational channel are punctured channels, and data is transmitted on a channel in the BSS operational channel excluding the punctured channels. For example, in the eight consecutive fundamental channels included in the BSS operational channel whose bandwidth is 160 MHz, six fundamental channels are used for data transmission, and two fundamental channels are punctured channels. 3. EHT station and non-EHT station

[159] The EHT station may be a non-AP STA that supports an EHT protocol. The EHT station supports an ultra-wide bandwidth, for example, a bandwidth of 320 MHz. The ultra-wide bandwidth supported by the ETH device may be referred to as the ETH BSS operating channel bandwidth, ETH BSS channel bandwidth, or similar. The EHT station may alternatively support bandwidth discontinuity, i.e., the ETH BSS operating channel bandwidth may support static puncture.

[160] A non-EHT station may be a non-AP STA that does not support the EHT protocol, or it may be a station that cannot identify an ultra-wide bandwidth and / or cannot identify discontinuous channel bandwidths, for example, a high-throughput (HT) station. In other words, based on the processing logic of the non-EHT station, it cannot correctly interpret the information about the operational channel bandwidth of EHT BSS.

[161] It should be noted that a BSS may include stations of the same type or of different types. For example, a BSS may include both the ETH station Petition 870260064973, dated 01 / 07 / 2026, p. 52 / 194 43 / 92 regarding non-ETH stations. Different stations may support different operational BSS channel bandwidths. For example, an ETH station may support a bandwidth of 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz, and a non-ETH station may support a bandwidth of 20 MHz, 40 MHz, 80 MHz, or 160 MHz. For ease of description, in this embodiment of this application, after the ETH AP establishes a BSS, a claimed operational BSS channel bandwidth for the EHT station is referred to as the ETH BSS operational channel bandwidth, and a claimed operational BSS channel bandwidth for the non-ETH station is referred to as the non-ETH BSS operational channel bandwidth. 4. Equivalent isotropic radiated power (EIRP) and power spectral density (PSD)

[162] EIRP can be the product of the power provided by a wireless transmit end device to an antenna and the absolute gain of the antenna in a given direction. PSD can indicate a correspondence between a frequency and a transmit power. For example, the power of each unit frequency wave can be obtained after the power spectral density is multiplied by an appropriate coefficient. When stations in a BSS communicate with each other, an AP can notify all non-AP STAs about the transmit power limits, i.e., the maximum transmit EIRPs or PSDs applicable to an operational channel bandwidth of the BSS, so that each non-AP STA can know the transmit power limit of its own operational channel bandwidth of the BSS.

[163] In a current protocol, the AP notifies, by transmitting a transmission power envelope element, the non-AP workstation about the transmission power limit applicable to Petition 870260064973, dated 01 / 07 / 2026, page 53 / 194 44 / 92 operational channel bandwidth of BSS. However, a current transmission power envelope element is designed based on a non-ETH station and cannot indicate a transmission power limit of an ETH BSS operational channel bandwidth.

[164] This application provides a power indication method and a communication device. The maximum transmission PSDs corresponding to two types of BSS operating channel bandwidths are indicated in a single element, so that transmission overheads can be reduced when the maximum transmission PSDs corresponding to the two types of BSS operating channel bandwidths are reliably indicated. The following initially describes the power indication method with reference to Figures 2 to 7.

[165] Figure 2 is a schematic flowchart of a power indication method according to one modality of this request, S210: A transmission end device generates a first frame #1.

[166] The transmitting end device may be the AP shown in Figure 1. Optionally, the transmitting end device may be an EHT AP compatible with the EHT protocol. The EHT AP is capable of sending the first frame #1 to several different types of receiving end devices. The receiving end devices may include an EHT station and a non-EHT station. For more detailed descriptions of the transmitting end device and the receiving end device, see the previous descriptions. The details are not described again in the present invention.

[167] The first frame #1 includes a first element #1, the first element #1 includes N pieces of first information #1, the N pieces of Petition 870260064973, dated 01 / 07 / 2026, page 54 / 194 45 / 92 first information #1 respectively indicates the maximum transmission power spectral densities (PSDs) corresponding to N fundamental channels, the first X fundamental channels in the N fundamental channels correspond to the fundamental channels in a first operational channel bandwidth of the basic services set, and a (X+1)-th fundamental channel to an N-th fundamental channel in the N fundamental channels are fundamental channels in a given bandwidth, excluding the X fundamental channels, where the given bandwidth is related to a value of N and a second operational channel bandwidth of the basic services set, the second operational channel bandwidth of the basic services set is different from the first operational channel bandwidth of the basic services set, N and X are positive integers, and N is greater than X.Therefore, the first frame #1 can indicate both the maximum transmission PSDs corresponding to the fundamental channels in the first operational channel bandwidth of the basic service set and the maximum transmission PSDs corresponding to the fundamental channels in the second operational channel bandwidth of the basic service set. The following describes separately in detail the first operational channel bandwidth of the basic service set, the operational channel bandwidth of the second service set, the first frame #1, the first element #1, the first information #1, and the indicated bandwidth.

[168] The difference between the first operational channel bandwidth of the Basic Services Set (abbreviated as the first operational channel bandwidth of the BSS) and the second operational channel bandwidth of the Basic Services Set (abbreviated as the second operational channel bandwidth of the BSS) can be explained as follows: A size of the first operational channel bandwidth of the BSS is different from a Petition 870260064973, dated 01 / 07 / 2026, page 55 / 194 46 / 92 refers to the size of the second operational BSS channel bandwidth, or the number of fundamental channels in the first operational BSS channel bandwidth is different from the number of fundamental channels in the second operational BSS channel bandwidth. For example, the first operational BSS channel bandwidth is 40 MHz, including two fundamental channels, and the second operational BSS channel bandwidth is 320 MHz, including 16 fundamental channels.

[169] Optionally, the fundamental channels in the second BSS operational channel bandwidth include the fundamental channels in the first BSS operational channel bandwidth. Optionally, a fundamental channel bandwidth size is 20 MHz. Alternatively, the first BSS operational channel bandwidth is included in the second BSS operational channel bandwidth.

[170] For example, the second operational channel bandwidth of BSS is 320 MHz, and the first operational channel bandwidth of BSS is a part of the 320 MHz bandwidth, for example, 80 MHz. In other words, if the second operational channel bandwidth of BSS includes 16 fundamental channels from 1 to 16, the first operational channel bandwidth of BSS includes some of the 16 fundamental channels. For example, fundamental channels 7 to 10 form a first operational channel bandwidth of BSS of 80 MHz.

[171] Optionally, the first BSS operational channel bandwidth is an EHT-free operational channel bandwidth, and the second BSS operational channel bandwidth is an EHT operational channel bandwidth. For descriptions of the EHT-free operational channel bandwidth and the EHT operational channel bandwidth, see the previous descriptions. It should be noted that the first channel bandwidth Petition 870260064973, dated 01 / 07 / 2026, page 56 / 194 The operational BSS bandwidth and the second operational BSS channel bandwidth can alternatively be channel bandwidths that will be defined in the future and that have corresponding attributes. This is not particularly limited in this application. To facilitate understanding of this embodiment, the following provides descriptions using an example where the first operational BSS channel bandwidth is the non-EHT operational channel bandwidth and the second operational BSS channel bandwidth is the EHT operational channel bandwidth. The following descriptions of the non-EHT operational channel bandwidth can be applied to the first operational BSS channel bandwidth, and the following descriptions of the EHT operational channel bandwidth can be applied to the second operational BSS channel bandwidth.

[172] Optionally, the transmitting end device transmits information indicating that the operational channel bandwidth of EHT BSS is different from the operational channel bandwidth without EHT BSS, so that the receiving end device can learn, based on this information, that the operational channel bandwidth of EHT BSS is different from the operational channel bandwidth without EHT BSS, and needs to interpret the N pieces of first information #1 in different ways. Alternatively, the receiving end device may consider, by default, that the operational channel bandwidth of EHT BSS is different from the operational channel bandwidth without EHT BSS. This is not particularly limited in this application.

[173] The first frame #1 may be a management frame generated when the transmitting end device establishes a BSS, for example, a beacon frame or a polling response frame. The transmitting end device may establish a Petition 870260064973, dated 01 / 07 / 2026, page 57 / 194 48 / 92 communication relationship with a plurality of receiving end devices, transmitting the first frame #1. The plurality of receiving end devices may include the EHT station and the non-EHT station.

[174] The first frame #1 may include the first element #1, and the first element #1 may indicate a transmission power envelope corresponding to the fundamental channel in the BSS operational channel bandwidth. For example, the first element #1 may be a transmission power envelope element (transmission power envelope element). It may be understood that the first element #1 may alternatively be another element defined in the future and used to implement a corresponding function. To facilitate understanding of this embodiment of this application, the following provides descriptions using an example where the first element #1 is the transmission power envelope element.

[175] To facilitate understanding of this embodiment of this application, the following describes an example of the transmission power envelope element with reference to Figure 3. See Figure 3. The transmission power envelope element may include the following four fields: a first field being an element identifier field, a second field being a length field, a third field being a transmit power information field, and a fourth field being a maximum transmit power field. The element identifier field identifies the transmission power envelope element, and the length field indicates the total length of other fields that follow the length field and are in the transmission power envelope element. The transmission power information field Petition 870260064973, dated 01 / 07 / 2026, p. 58 / 194 49 / 92 and the maximum transmission power field indicate maximum transmission power information corresponding to at least one fundamental channel, for example, a maximum transmission PSD or EIRP.

[176] It should be noted that the transmission power envelope element and the sizes of the fields included in the transmission power envelope element are not particularly limited in this request. For example, the element identifier field occupies one octet, the length field occupies one octet, the transmission power information field occupies one octet, and the octets occupied by the maximum transmission power are related to a number of first information chunks #1.

[177] Specifically, for the transmit power information field, the field may include the following three subfields: a maximum transmit power count subfield, a maximum transmit power interpretation subfield, and a maximum transmit power category subfield. The maximum transmit power interpretation subfield and the maximum transmit power category subfield indicate maximum transmit power information corresponding to at least one fundamental channel, and the maximum transmit power category subfield indicates a category to which a maximum transmit power is applied. For example, the subfield indicates that a maximum transmit power indicated by the element is applied to a standard category.When the maximum transmission power interpretation subfield has a different meaning, the maximum transmission power counting subfield also has a different meaning. The following describes this in detail. Petition 870260064973, dated 01 / 07 / 2026, page 59 / 194 50 / 92

[178] It should be noted that the size of the transmission power information field and the sizes of the subfields included in the field are not particularly limited in this application. For example, when the transmission power information field occupies an octet, the maximum transmission power count subfield may occupy three bits, the maximum transmission power interpretation subfield occupies three bits, and the maximum transmission power category subfield occupies two bits.

[179] Different values ​​of the maximum transmission power interpretation subfield correspond to different interpretations. For example, Table 1 shows one way of interpreting the maximum transmission power interpretation subfield. Table 1 Value Interpretation of the maximum transmission power interpretation subfield 0 Local EIRP 1 Local PSD EIRP 2 Regulatory client EIRP 3 Regulatory client PSD EIRP 4 to 7 Reserved

[180] When the value of the maximum transmission power interpretation subfield is 0 or 2 (case A), the maximum transmission power count subfield will be used to describe the local EIRP or the regulatory customer EIRP. When the value of the maximum transmission power interpretation subfield is 1 or 3 (case B), the maximum transmission power interpretation subfield will be used to describe the local EIRP PSD or the regulatory customer EIRP PSD (or PSD, for short). In other words, when the maximum transmission power interpretation subfield has a different value, the maximum transmission power count subfield will also have a different meaning. The following describes this in detail. Petition 870260064973, dated 01 / 07 / 2026, p. 60 / 194 51 / 92

[181] It can be understood that, when the first element #1 is the transmission power envelope element and a maximum transmission power information field indicates the PSD, the N pieces of first information #1 are carried, respectively, in N subfields in the maximum transmission power information field. In this embodiment of this request, the descriptions of the subfields in the maximum transmission power information field can be applied to the descriptions of first information #1. For example, the descriptions of the first X subfields in the N subfields can be applied to the descriptions of the first X pieces of first information #1 in the N pieces of first information #1, and the descriptions of a (X+1)-th subfield to an N-th subfield in the N subfields can be applied to the descriptions of a (X+1)-th piece of first information #1 to an N-th piece of first information #1 in the N pieces of first information #1.Optionally, each subfield in the maximum transmission power field occupies an octet.

[182] Optionally, the first X pieces of information #1 in the N pieces of information #1 are sequentially ordered in ascending order of frequencies of the corresponding fundamental channels. Optionally, the (X+1)-th piece of information #1 to the N-th piece of information #1 in the N pieces of information #1 are sequentially ordered in ascending order of frequencies of the corresponding fundamental channels. Therefore, the receiving end can determine, based on the positions of the first pieces of information #1, the maximum transmission PSDs corresponding to the fundamental channels, without the need for an additional bit to indicate a specific correspondence between the fundamental channels and information #1, further reducing transmission overheads. Petition 870260064973, dated 01 / 07 / 2026, page 61 / 194 52 / 92

[183] ​​Case A: When the maximum transmission power interpretation subfield is set to 1 or 3, the maximum transmission power count subfield indicates a number of subfields (maximum transmission PSD subfields) included in the maximum transmission power field. In other words, different values ​​of the maximum transmission power count subfield indicate the value of N. Optionally, the value of N is 0 or 2 raised to an, where en is an integer greater than or equal to 0. For example, Table 2 shows one way of interpreting the maximum transmission power count subfield corresponding to a case where the maximum transmission power interpretation subfield is set to 1 or 3. Table 2 Value Number N of subfields in the maximum transmission power field 0 0 1 1 2 2 3 4 4 8 5 to 7 Reserved or a value greater than 8

[184] In other words, when the value of the maximum transmission power count subfield is not 0, the number of subfields included in the maximum transmission power field is represented by N. When the value of the maximum transmission power count subfield is 0, i.e., N is 0, it indicates that the maximum transmission power field includes one subfield, and the subfield indicates a maximum transmission PSD of any bandwidth in the BSS operating channel bandwidth. When the number N of subfields in the maximum transmission power field is greater than or equal to 1, each subfield in the maximum transmission power field is Petition 870260064973, dated 01 / 07 / 2026, p. 62 / 194 53 / 92 is used to describe a maximum transmission PSD of a fundamental channel.

[185] The above describes the first frame #1 and the first element #1. The indicated bandwidth is related to the value of N and the second operational channel bandwidth of BSS. The following describes the indicated bandwidth in different cases, with reference to Figure 4.

[186] Case 1: When N equals a first value, the indicated bandwidth is the second operational channel bandwidth of the BBS. In other words, the indicated bandwidth may be the operational channel bandwidth of the EHT BSS.

[187] The first value is a fundamental channel number in the EHT BBS operating channel bandwidth. For example, if the EHT BSS operating channel bandwidths are 20 MHz, 40 MHz, 80 MHz, 160 MHz and 320 MHz, the first values ​​will be 1, 2, 4, 8 and 16, respectively.

[188] In other words, when the number of subfields is equal to the number of fundamental channels in the operational channel bandwidth of EHT BBS, each subfield in the (X+1)-th to N-th subfield in the maximum transmission power field can indicate maximum transmission PSDs corresponding to the fundamental channels, excluding the operational channel bandwidth without EHT BSS.

[189] For example, see Figure 4. The operational channel bandwidth of EHT BSS is 320 MHz, including 16 (i.e., the first value equals 16) fundamental channels, numbered 1 to 16 in ascending order of frequencies. Fundamental channels 7 and 8 are punched channels. Fundamental channels 1 to 4 form an 80 MHz secondary channel, the bandwidths of channels 5 and 6 form a 40 MHz primary channel, and the channels Petition 870260064973, dated 01 / 07 / 2026, p. 63 / 194 54 / 92 fundamental channels 9 to 16 form a secondary 160 MHz channel. The operational channel bandwidth without EHT BSS is 40 MHz. Two fundamental channels, fundamental channels 5 and 6, are included.

[190] When N equals the first value 16, the maximum transmission power field includes 16 subfields, and the first two subfields indicate, respectively, the maximum transmission PSDs corresponding to the fundamental channels (i.e., fundamental channels 5 and 6) included in an operational channel without EHT BSS. A 3rd subfield to a 16th subfield indicates, respectively, the maximum transmission PSDs corresponding to the fundamental channels in the operational channel bandwidth of BSS EHT, excluding the fundamental channels included in the operational channel without EHT BSS. In other words, the 3rd subfield to a 16th subfield indicates, respectively, the maximum transmission PSDs corresponding to fundamental channels 1 to 4 and 7 to 16. It can be understood that fundamental channels 7 and 8 are punctured channels. Therefore, the meanings of a 7th subfield and an 8th subfield in the 16 subfields can be reserved or can be set to minimum values ​​of -128.In this case, it indicates that the 20 MHz channel cannot be used for transmission. Details are not described below.

[191] Case 2: When N is less than a first value, the indicated bandwidth is the primary (N*fundamental channel bandwidth) MHz in the operational channel bandwidth of the EHT BBS.

[192] For an operational BSS channel bandwidth of 40 MHz, 80 MHz, 160 MHz or 320 MHz, if N is greater than 0 and less than 2, 4, 8 or 16, respectively, when N is equal to 1, 2, 4 or 8, respectively, the indicated bandwidth will be 20 MHz primary, 40 MHz primary, 80 MHz primary or 160 MHz primary, respectively. Petition 870260064973, dated 01 / 07 / 2026, p. 64 / 194 55 / 92

[193] In other words, when the number of subfields is less than the number of fundamental channels in the EHT BBS operational channel, each subfield in the (X+1)-th to N-th subfields in the maximum transmission power field may indicate PSDs corresponding to the fundamental channels in the indicated bandwidth, excluding the fundamental channels included in the operational channel without EHT BSS.

[194] For example, see also Figure 4. In case 2, when N is less than the first value, 16, N can be equal to 8. In this case, the indicated bandwidth is 160 MHz primary, the maximum transmission power field includes eight subfields, and the first two subfields in the eight subfields indicate, respectively, the maximum transmission PSDs corresponding to the fundamental channels (i.e., fundamental channels 5 and 6) in the operational channel bandwidth without EHT BSS. A third subfield to an eighth subfield indicate, respectively, the maximum transmission PSDs corresponding to the fundamental channels in the operational channel bandwidth of BSS EHT, excluding the fundamental channels included in the operational channel without EHT BSS, i.e., the maximum transmission PSDs corresponding to fundamental channels 1 to 4 and 7 and 8.

[195] It should be noted that, as some fundamental channels may not have maximum transmission PSD limits or the maximum transmission PSD limits of the fundamental channels have already been submitted previously (which remains unchanged in this case), in this embodiment of this application, there may be no need to additionally design a subfield to indicate the maximum transmission PSDs corresponding to the fundamental channels, i.e., there is no maximum transmission power subfield corresponding to a fundamental channel that is not included in the indicated bandwidth, but rather in the operational channel bandwidth of the EHT BBS. Therefore, the Petition 870260064973, dated 01 / 07 / 2026, p. 65 / 194 56 / 92 transmission overloads can be reduced by reducing redundant subfields.

[196] Case 3: When N is greater than a first value, the indicated bandwidth is a bandwidth greater than the operational channel bandwidth of the EHT BBS; that is, the number of subfields in the maximum transmission power field is greater than the number of fundamental channels included in an operational EHT BBS channel. The first Y subfields in the N subfields indicate, respectively, the maximum transmission PSDs corresponding to Y fundamental channels included in the EHT BBS operational channel. Y is a positive integer and Y is greater than X, meaning the first Y subfields include the first X subfields above.In other words, in this application, the first X subfields (i.e., the first X pieces of information in the N pieces of information) within the N subfields can have two functions: to indicate the maximum transmission PSDs corresponding to the fundamental channels in the operational channel bandwidth without EHT BSS, and to indicate the maximum transmission PSDs corresponding to the fundamental channels in the operational channel bandwidth with EHT BSS. Therefore, there is no need to repeatedly design the X subfields to indicate, respectively, the maximum transmission PSDs corresponding to the fundamental channels in the operational channel bandwidth without EHT and the maximum transmission PSDs corresponding to the fundamental channels in the operational channel bandwidth with EHT, thus reducing transmission overheads.

[197] For example, see also Figure 4. In case 3, when N is greater than the first value, 16, N can be equal to a value greater than 16 that is 2 raised to the power of an, such as 32 or 64. An example where N equals 32 is used. The maximum transmission power field includes 32 subfields, and the Petition 870260064973, dated 01 / 07 / 2026, p. 66 / 194 The first 16 subfields in the 32 subfields indicate the maximum transmission PSDs corresponding to the fundamental channels in the operational channel bandwidth of EHT BSS. Fundamental channels 5 and 6 in the operational channel bandwidth without EHT BSS are organized in the first two subfields, and a third subfield in a 16th subfield indicates, respectively, the maximum transmission PSDs corresponding to fundamental channels 1 to 4 and 7 to 16. A 17th subfield in a 32nd subfield is reserved.

[198] It should be noted that N in cases 1 to 3 above is greater than X. When N is less than or equal to the number X of fundamental channels in the first operational BSS channel bandwidth, the indicated bandwidth may be related to N and X (or to the first operational BSS channel bandwidth). When N is less than or equal to X, this is described in the following cases: Case a: When N equals a second value, the indicated bandwidth is the operational channel bandwidth without BSS EHT. The second value is the number X of fundamental channels in the first operational channel bandwidth of the BSS. For example, if the operational channel bandwidths without BSS EHT are 20 MHz, 40 MHz, 80 MHz, and 160 MHz, the second values ​​will be 1, 2, 4, and 8, respectively.

[199] Case b: When N is less than a second value, the indicated bandwidth is primary (N*fundamental channel bandwidth) MHz in the operational channel bandwidth without EHT BBS. For example, for a bandwidth of 40 MHz, 80 MHz, or 160 MHz, if N is greater than 0 and less than 2, 4, or 8, respectively, when N is equal to 1, 2, or 4, respectively, the indicated bandwidth is primary 20 MHz, primary 40 MHz, or primary 80 MHz, respectively. Petition 870260064973, dated 01 / 07 / 2026, p. 67 / 194 58 / 92

[200] The above describes the indicated bandwidth, the number and arrangement of subfields in the maximum transmission power field (i.e., the number and arrangement of first information #1 pieces). In this embodiment of this application, the N first information #1 pieces are designed by defining the indicated bandwidth, such that the N first information #1 pieces can simultaneously indicate the maximum transmission PSDs corresponding to the fundamental channels in the two types of BSS operational channel bandwidths. Both the EHT station and the non-EHT station can obtain, based on the N first information #1 pieces, the maximum transmission PSDs corresponding to the fundamental channels in their own BSS operational channel bandwidths, and may not need to additionally define a plurality of frames or elements.Therefore, transmission overheads can be reduced when the maximum transmission PSDs corresponding to the two types of BSS operating channel bandwidths are reliably indicated.

[201] In addition, the fundamental X channels in the operating channel bandwidth without EHT BSS are also included in the operating channel bandwidth of BSS EHT.

[202] In addition, the transmission power envelope element is simply extended in another way. For example, a maximum transmission PSD subfield corresponding to every 20 MHz in the EHT BSS operating channel bandwidth, excluding the operating channel bandwidth without EHT BSS, is added to one end of the element, or a maximum transmission EIRP subfield corresponding to a bandwidth of 320 MHz is added. As the element has only one field indicating a number of maximum transmission PSD subfields, but the field currently indicates a Petition 870260064973, dated 01 / 07 / 2026, p. 68 / 194 59 / 92 number of maximum transmission PSD subfields corresponding to each of some or all of the 20 MHz in the bandwidth without EHT BSS, the method cannot implement the following function: porting a maximum transmission PSD subfield corresponding to each 20 MHz that is within the operational channel bandwidth of EHT BSS and that is greater than the operational channel bandwidth without EHT BSS. The reason why porting the maximum transmission PSD subfield corresponding to each extra 20 MHz is unnecessary is that no additional PSD limit is needed to transmit a PPDU in approximately 20 MHz. Therefore, the method lacks flexibility and leads to high overheads. Compared to this method, in this implementation, the maximum transmission PSD subfield corresponding to each extra 20 MHz can be omitted, so overheads are low and flexibility is high.

[203] It should be noted that when the maximum transmission power interpretation subfield is set to 1 or 3, the meanings of the maximum transmission power field are described. Setting the maximum transmission power interpretation subfield to 0 or 2, i.e., the maximum transmission power field indicates an EIRP corresponding to the channel, is described below.

[204] When the maximum transmission power interpretation subfield is set to 0 or 2, different values ​​of the maximum transmission power count subfield indicate different subfields included in the maximum transmission power field. For example, Table 3 shows one way of interpreting the maximum transmission power count subfield corresponding to a case where the maximum transmission power interpretation subfield is set to 0 or 2. Table 3 Petition 870260064973, dated 01 / 07 / 2026, p. 69 / 194 60 / 92Value Subfields included in a corresponding maximum transmission power field 0 Maximum transmission power for 20 MHz 1 Maximum transmission power for 20 MHz Maximum transmission power for 40 MHz 2 Maximum transmission power for 20 MHz Maximum transmission power for 40 MHz Maximum transmission power for 80 MHz 3 Maximum transmission power for 20 MHz Maximum transmission power for 40 MHz Maximum transmission power for 80 MHz MHz) Maximum transmission power for 160 / (80+80) MHz (Maximum Transmit Power For 60 / (80+80) MHz) For STAs TVHT, reserved (for STAs TVHT,(reserved) 4 Maximum transmission power for 20 MHz Maximum transmission power for 40 MHz Maximum transmission power for 80 MHz Maximum transmission power for 160 / (80+80) MHz Maximum transmission power for 60 / (80+80) MHz Maximum transmission power for 320 MHz 5 to 7 The first five octets indicate, respectively, the maximum transmission power for 20 MHz, the maximum transmission power for 40 MHz, the maximum transmission power for 80 MHz, the maximum transmission power for 160 / (80+80) MHz, and the maximum transmission power for 320 MHz. The remaining octets are reserved.

[205] In other words, the number of subfields included in the maximum transmission power field is related to the content and value of the maximum transmission power count subfield. For example, when the value of the maximum transmission power count subfield is 0, the maximum transmission power field includes one subfield, and the Petition 870260064973, dated 01 / 07 / 2026, p. 70 / 194 The 61 / 92 subfield represents the maximum transmission power of a 20 MHz bandwidth. When the maximum transmission power count subfield value is 1, the maximum transmission power subfield includes two subfields. One subfield represents the maximum transmission power corresponding to a 20 MHz bandwidth channel, and the other represents the maximum transmission power corresponding to a 40 MHz bandwidth channel. By analogy, for example, Figure 3 is a diagram of a maximum transmission power field structure corresponding to a case where the maximum transmission power count subfield value is 4.

[206] It can be understood that the receiving end device can learn about its own BSS operating channel bandwidth. For example, the first frame #1 may additionally include elements that indicate an EHT BSS operating channel bandwidth and an operating channel bandwidth without EHT BSS, respectively.For example, a station without EHT learns about an operational channel bandwidth size without EHT BSS based on an element that indicates the operational channel bandwidth without EHT BSS, for example, a high-efficiency (HE) operating element, a very high-throughput (VHT) operating element, or a high-throughput (HT) operating element, and learns about a number X of fundamental channels based on the bandwidth size, to learn that the first X pieces of first information #1 in the N pieces of first information #1 indicate maximum transmit PSDs corresponding to the fundamental channels in the operational channel bandwidth without EHT BSS. In another example, an EHT station learns about a bandwidth size. Petition 870260064973, dated 01 / 07 / 2026, page 71 / 194 62 / 92 of EHT BSS operational channel based on an element that indicates the EHT BSS operational channel bandwidth, learns about a number Y of fundamental channels based on the bandwidth size, to determine the meaning of an indicated bandwidth based on a number of first information pieces #1 and the EHT BSS operational channel bandwidth, to interpret the N first information pieces #1 to obtain maximum transmission PSDs corresponding to the fundamental channels in the EHT BSS operational channel bandwidth.

[207] The fundamental channels in the operating channel bandwidth without EHT BSS are consecutive. However, the operating channel bandwidth of EHT BSS allows one or more fundamental channels to be punctured, i.e., it allows the fundamental channels to be inconsecutive. When the operating channel bandwidth of EHT BSS is different from the operating channel bandwidth without EHT BSS, the operating channel bandwidth of EHT BSS and the operating channel bandwidth without EHT BSS are indicated by different elements. For example, as mentioned above, the operating channel bandwidth of EHT BSS is indicated by the EHT operating element, and the operating channel bandwidth without EHT BSS is indicated by the HE operating element, the VHT operating element, or the HT operating element.When the operational channel bandwidth of EHT BSS is the same as the operational channel bandwidth without EHT BSS, the operational channel bandwidth of EHT BSS and the operational channel bandwidth without EHT BSS are indicated by the same element, for example, the HE operating element, the VHT operating element, or the HT operating element. To facilitate understanding of this embodiment of this application, the following uses a second element indicating the operational channel bandwidth of EHT BSS as an example description. Optionally, the... Petition 870260064973, dated 01 / 07 / 2026, page 72 / 194 63 / 92 first frame #1 additionally includes the second element, which may indicate a fundamental channel in the EHT BSS operating channel bandwidth. The second element may be an EHT operation element. The following provides descriptions using an example where the second element is the EHT operation element, with reference to Figure 5.

[208] See Figure 5. The EHT operation element may include an Element Identifier field, a Length field, an Extension Element Identifier field, an EHT Operation Parameter field, an EHT Modulation and Coding Scheme (MCS) field and Basic EHT MCS AND NSS Set, and an EHT Operation Information field. The Element Identifier field and the Extension Element Identifier field identify the element. The Length field indicates the total length of the other fields after the Length field in the EHT operation element. The EHT Operation Parameter field indicates control information, for example, it indicates whether the EHT Operation Information field is present.The basic EHT MCS and NSS set field indicates an MCS supported by an EHT station on a BSS when the EHT station transmits one data unit for each number of streams. The EHT operation information field indicates the BSS operational channel bandwidth for an EHT station and includes a channel bandwidth subfield and a disabled subchannel bitmap field. The channel bandwidth subfield may indicate an operational BSS EHT channel bandwidth size, and the disabled subchannel bitmap subfield indicates fundamental channels that are punctured in the channel bandwidth. Petition 870260064973, dated 01 / 07 / 2026, page 73 / 194 64 / 92 operational of BSS EHT.

[209] It can be understood that the size of the element and the sizes of the fields and subfields in the element are not limited in this request. For example, the element identifier field may occupy one octet, the length field may occupy one octet, the element identifier extension field may occupy one octet, the EHT operation parameter field may occupy one octet, the basic EHT MCS and NSS set field may occupy four octets, and the EHT operation information field may occupy zero, three, or five octets.

[210] S220: The transmitting end device sends the first frame #1 to a first receiving end device and a second receiving end device. Consequently, the first receiving end device receives the first frame #1 from the transmitting end device, and the second receiving end device receives the first frame #1 from the transmitting end device.

[211] The transmitting end device can send the first frame #1 in a broadcast manner. Therefore, a plurality of receiving end devices can receive the first frame #1, and the plurality of receiving end devices can include at least one EHT station and / or at least one non-EHT station. In this embodiment of this application, the first receiving end device can be a non-EHT station, and the second receiving end device can be an EHT station. It should be noted that the first receiving end device and the second receiving end device can alternatively be receiving end devices with matching attributes and that will be Petition 870260064973, dated 01 / 07 / 2026, page 74 / 194 65 / 92 defined in the future. This is not particularly limited in this application. To facilitate understanding of this embodiment of this application, the following provides descriptions using an example where the first receiving end device is the non-EHT station and the second receiving end device is the EHT station. The following descriptions of the non-EHT station can be applied to the first receiving end device, and the following descriptions of the EHT station can be applied to the second receiving end device.

[212] S230: The first receiving end device determines, based on the first X pieces of first information #1 in the N pieces of first information #1, the maximum transmission PSDs corresponding to the fundamental channels in the first operational channel bandwidth of the basic service set.

[213] For example, the first receiving end device receives the first frame #1. If a maximum transmission power interpretation subfield in a transmission power information field in a transmission power envelope element (i.e., the first element #1) of the first frame #1 determines that the maximum transmission power field indicates a PSD, i.e., when a value of the maximum transmission power interpretation subfield in the transmission power information field is 1 or 3, the first receiving end device determines the number N of first information #1 chunks based on a maximum transmission power count subfield in the transmission power information field, and N is greater than the number X of fundamental channels in the first operational channel bandwidth of BSS.In this case, the first receiving end device intercepts the first X pieces of first information #1 in the. Petition 870260064973, dated 01 / 07 / 2026, p. 75 / 194 66 / 92 N pieces of first information #1, for example, reads only the first X subfields in the N subfields of the maximum transmission power field to learn the maximum transmission PSDs corresponding to the fundamental channels included in the first operational channel bandwidth, and ignores subsequent first information #1.

[214] Optionally, when the maximum transmission power interpretation subfield indicates that the maximum transmission power field indicates an EIRP, i.e., when a value of the maximum transmission power interpretation subfield is 0 or 2, if N received is greater than 3, the first receiving end device only needs to receive a maximum transmission power subfield of 20 MHz, a maximum transmission power subfield of 40 MHz, a maximum transmission power subfield of 80 MHz and a maximum transmission power subfield of 160 MHz, ignores other remaining maximum transmission power subfields and determines, based on the maximum transmission power field, an EIRP corresponding to each bandwidth.

[215] S240: The second receiving end device determines, based on the N pieces of first information #1, the maximum transmission PSDs corresponding to the fundamental channels in the second operational channel bandwidth of the basic service set.

[216] For example, the second receiving end device receives the first frame #1. If a maximum transmission power interpretation subfield in a transmission power information field in a transmission power envelope element (i.e., the first element #1) of the first frame #1 determines that the maximum transmission power field indicates a PSD, i.e., when a value of the maximum transmission power interpretation subfield in the transmission power information field Petition 870260064973, dated 01 / 07 / 2026, page 76 / 194 67 / 92 transmission power is 1 or 3, the first receiving end device determines the number N of first information #1 pieces based on a maximum transmission power count subfield in the transmission power information field, and N is greater than the number X of fundamental channels in the first operational BSS channel bandwidth. The first operational BSS channel bandwidth is different from the second operational BSS channel bandwidth.In this case, the second receiving end device can compare the values ​​of the number N of first information pieces #1 and the number (i.e., the first value) of fundamental channels in the second operational BSS channel bandwidth to determine the indicated bandwidth, in order to determine, based on the meaning of the indicated bandwidth and the N first information pieces #1, the maximum transmission PSDs corresponding to the fundamental channels in the second operational BSS channel bandwidth. For more specific descriptions of the indicated bandwidth, refer to the descriptions of case 1, case 2, and case 3 in step S210. The details are not described again in the present invention.

[217] If N is less than or equal to the number X of fundamental channels in the first operational channel bandwidth of BSS, the first receiving end device and the second receiving end device receive or interpret the N pieces of first information #1 in the same way, that is, they determine that the N pieces of first information #1 are maximum transmission PSDs corresponding to the fundamental channels from a low frequency to a high frequency in a corresponding indicated bandwidth. For more detailed descriptions of the indicated bandwidth, see the descriptions of case a and case b in step S210. The details are not described again in the present invention. Petition 870260064973, dated 01 / 07 / 2026, page 77 / 194 68 / 92

[218] Optionally, when the maximum transmission power interpretation subfield indicates that the maximum transmission power field indicates an EIRP, i.e., when a value of the maximum transmission power interpretation subfield is 0 or 2, if N received is greater than 4, the second receiving end device only needs to receive a maximum transmission power subfield of 20 MHz, a maximum transmission power subfield of 40 MHz, a maximum transmission power subfield of 80 MHz, a maximum transmission power subfield of 160 MHz and a maximum transmission power subfield of 320 MHz, determines a corresponding EIRP for each bandwidth based on the maximum transmission power field and ignores other remaining maximum transmission power subfields.

[219] Based on the technical solution, the N pieces of first information #1 are designed by defining the indicated bandwidth, so that the N pieces of first information #1 can simultaneously indicate the maximum transmission PSDs corresponding to the fundamental channels in two types of BSS operational channel bandwidth. Different types of receiving end devices, for example, both an EHT station and a non-EHT station, can obtain, based on the N pieces of first information #1, the maximum transmission PSDs corresponding to the fundamental channels in their own BSS operational channel bandwidths.In this solution, a plurality of frame types or elements cannot be additionally defined to indicate the maximum transmission PSDs corresponding to the fundamental channels at different BSS operational channel bandwidths, so that transmission overheads are reduced when the maximum transmission PSDs correspond to the two types of BSS operational channel bandwidths. Petition 870260064973, dated 01 / 07 / 2026, p. 78 / 194 69 / 92 are reliably indicated.

[220] The foregoing describes the power indication method with reference to Figure 2 and Figure 5. An embodiment of this application further provides another power indication method, which is different from that in which the X fixed pieces of first information #1 (the number of fundamental channels in the first operational channel bandwidth of BSS) indicate the maximum transmission PSDs corresponding to the fundamental channels in the first operational channel bandwidth of BSS in Figures 2 to 5. In the following method, P pieces of first information #1 that are flexibly defined can indicate the maximum transmission PSDs corresponding to the fundamental channels in the first operational channel bandwidth of BSS. The following describes the method with reference to Figure 6.

[221] Figure 6 is a schematic flowchart of another method of indicating power according to an embodiment of this application.

[222] S610: A transmission end device generates a first frame #2.

[223] The first frame #2 includes a first element #2, the first element #2 includes P pieces of first information #2 and Q pieces of second information, the P pieces of first information #2 respectively indicate the maximum transmission power spectral densities (PSDs) corresponding to P fundamental channels, the P fundamental channels are some or all of the fundamental channels in a first operational channel bandwidth of the basic services set, the Q pieces of second information respectively indicate the maximum transmission PSDs corresponding to the fundamental channels in a given bandwidth, excluding the P fundamental channels, and P and Q are positive integers. The given bandwidth is related to a value of M and a second Petition 870260064973, dated 01 / 07 / 2026, p. 79 / 194 70 / 92 operating channel bandwidth of the basic services set, the second operating channel bandwidth of the basic services set is different from the first operating channel bandwidth of the basic services set, M is equal to the sum of P and Q, and M is a positive integer.

[224] The first element #2 additionally includes a third piece of information and a fourth piece of information, the third piece of information indicates a value of P, and the fourth piece of information indicates a value of Q.

[225] For the meanings of the transmission end device, the first element #2, the first operating channel bandwidth of the basic services set, the second operating channel bandwidth of the basic services set, and the indicated bandwidth, see the related descriptions in Figures 2 to 5. The details are not described in the present invention again. The following mainly describes the first information #2, the second information, the third information, and the fourth information.

[226] The P pieces of first information #2 can be pieces of information carried in P subfields, respectively, and the Q pieces of second information can be pieces of information carried in Q subfields, respectively. When the first element #2 is a transmission power envelope element, the P subfields carrying the first information #2 can be subfields in a maximum transmission power field, and the Q subfields carrying the second information can be subfields subsequent to the subfields carrying the P pieces of first information #2 in the field. For example, Q subfields can be newly added, and Q subfields are used to carry the Q pieces of second information, respectively.

[227] Optionally, the P pieces of first information #2 are Petition 870260064973, dated 01 / 07 / 2026, page 80 / 194 71 / 92 sequentially ordered in ascending order of frequencies of the corresponding fundamental channels. Optionally, the Q second information pieces are sequentially ordered in ascending order of frequencies of the corresponding fundamental channels. Therefore, the receiving end can determine, based on the positions of the first information pieces, the maximum transmission PSDs corresponding to the fundamental channels, and no additional bits are needed to indicate a specific match between the fundamental channels and the first information pieces, further reducing transmission overheads.

[228] It should be noted that, as the P fundamental channels are some or all of the fundamental channels in the first operational channel bandwidth of BSS, the value of P may be less than or equal to the number of all fundamental channels in the first operational channel bandwidth of BSS. In other words, in this implementation, the first information #2, whose number is less than or equal to the number of all fundamental channels in the first operational channel bandwidth of BSS, may indicate the maximum transmission PSDs corresponding to the fundamental channels in the first operational channel bandwidth of BSS.

[229] For a first receiving end device, as some channels in the first operational BSS channel bandwidth may not have maximum PSD transmission power limits or the corresponding maximum PSD transmission power limits for the channels have already been sent previously (which remains unchanged in this case), in this implementation, P pieces of information can be designed to indicate, respectively, maximum transmission PSDs corresponding to the fundamental channels in the first operational BSS channel bandwidth. Therefore, transmission overheads can be reduced by reducing redundant subfields. Petition 870260064973, dated 01 / 07 / 2026, p. 81 / 194 72 / 92

[230] The maximum transmission PSDs corresponding to fundamental channels that are not in the first operational channel bandwidth of the BSS, but in the indicated bandwidth, can also be determined based on the Q pieces of second information. A fundamental channel that is neither in the first operational channel bandwidth of the BSS nor in the indicated bandwidth has no corresponding maximum transmission PSDs.

[231] The third pieces of information indicate a value of P, and the fourth pieces of information indicate a value of Q. It should be noted that when the first element #2 is the transmit power envelope element, and P pieces of the third pieces of information are respectively carried in the P subfields in the maximum transmit power field, the third pieces of information can be carried in a maximum transmit power count subfield in the transmit power envelope element. In other words, different values ​​of the maximum transmit power count subfield correspond to different values ​​of P. Furthermore, an EHT maximum transmit power count subfield can be defined in the first element #2 to carry the fourth pieces of information. Different values ​​of different EHT maximum transmit power count subfields can correspond to different values ​​of Q.

[232] Optionally, the first element #2 may additionally include indication information, and the indication information indicates whether the number of pieces of first information #2 is equal to the number of all fundamental channels in the first operational channel bandwidth of the basic service set. When the indication information indicates that the number of pieces of first information #2 is equal Petition 870260064973, dated 01 / 07 / 2026, page 82 / 194 73 / 92 to the number of all fundamental channels in the first operational channel bandwidth of the basic services set, the transmitting end device may not need to send the third information, or the receiving end device may not need to interpret it. A station without EHT can obtain the P pieces of first information #2 based on the number of all fundamental channels in the first operational channel bandwidth of the basic services set. In this case, the fourth information can be carried in the maximum transmit power count subfield in the transmit power envelope element.

[233] It can be understood that the meanings of the indication fields are similar to those defined in Figures 2 to 5 and are all related to the number of information indicating the maximum transmission PSDs. In the implementations of Figures 2 to 5, the number of information indicating the maximum transmission PSDs is represented by a number N of first information pieces #1. In this implementation, the number of subfields indicating the maximum transmission PSDs is represented by a sum M of the number P of first information pieces #2 and the number Q of second information pieces. In another implementation, the fourth information indicates that a value of Q is the M mentioned above. In this case, the Q second information pieces indicate, respectively, the maximum transmission PSDs corresponding to the fundamental channels in the indicated bandwidth.

[234] To facilitate understanding of this modality of this application, the following describes three cases of the bandwidth indicated in this implementation with reference to Figure 7. See Figure 7. For the meanings of fundamental channel, channel, operational channel bandwidth without EHT BBS and operational channel bandwidth of EHT BSS in Figure 7, see the Petition 870260064973, dated 01 / 07 / 2026, page 83 / 194 74 / 92 descriptions in Figure 4. In this implementation, in case 1, M is equal to a first value, 16, P can be 1 and Q can be 15, that is, one subfield indicates a maximum transmission PSD corresponding to a fundamental channel 7 in the operational channel bandwidth without EHT BBS, and other subfields indicate maximum transmission PSDs corresponding to fundamental channels in the indicated bandwidth, excluding a fundamental channel 5. In case 2, M is less than a first value, M = 8, P can be 1 and Q can be 7, that is, one subfield indicates a maximum transmission PSD corresponding to a fundamental channel 5 in the operational channel bandwidth without EHT BBS, and other subfields indicate maximum transmission PSDs corresponding to fundamental channels in the indicated bandwidth, excluding a fundamental channel 7. In case 3, M is greater than the first value, M = 32, P can be 1 and Q can be 31.For the meaning of the indicated bandwidth, refer to the descriptions of cases 1 to 5 above. Details are not described again in the present invention.

[235] S620: The transmitting end device sends the first frame #2 to a first receiving end device and a second receiving end device. Consequently, the first receiving end device receives the first frame #2 from the transmitting end device, and the second receiving end device receives the first frame #2 from the transmitting end device.

[236] For descriptions of this step, see the descriptions of step S220 in Figure 2. The details are not described again in the present invention.

[237] S630: The first receiving end device determines, based on the P pieces of first information #2, the maximum transmission PSDs corresponding to the fundamental channels in the first operational channel bandwidth of the basic service set. Petition 870260064973, dated 01 / 07 / 2026, p. 84 / 194 75 / 92

[238] For example, the first receiving end device receives the first frame #2. If a maximum transmission power interpretation subfield in a transmission power information field in a transmission power envelope element (i.e., the first element #2) of the first frame #2 determines that the maximum transmission power field indicates a PSD, i.e., when a value of the maximum transmission power interpretation subfield in the transmission power information field is 1 or 3, the first receiving end device determines the number P of first information #2 chunks based on a maximum transmission power count subfield in the transmission power information field, and P is greater than 0.In this case, the first receiving end device intercepts the first P pieces of information #2, for example, it reads only the first P subfields in the M subfields in the maximum transmission power field, to learn about the maximum transmission PSDs corresponding to the fundamental channels included in the first operational channel bandwidth, and ignores the subsequent MP subfields.

[239] Optionally, when the maximum transmission power interpretation subfield indicates that the maximum transmission power field indicates an EIRP, i.e., when a value of the maximum transmission power interpretation subfield is 0 or 2, the first receiving end device determines, based on a maximum transmission power count subfield in the transmission power information field, subfields included in the maximum transmission power field and determines, based on the maximum transmission power field, the EIRP corresponding to the channel.

[240] S640: The second receiving end device Petition 870260064973, dated 01 / 07 / 2026, page 85 / 194 76 / 92 determines, based on the P pieces of first information #2 and the Q pieces of second information, the maximum transmission PSDs corresponding to the fundamental channels in the second operational channel bandwidth of the basic services set.

[241] For example, the second receiving end device receives the first frame #2. If a maximum transmission power interpretation subfield in a transmission power information field in a transmission power envelope element (i.e., the first element #2) of the first frame #2 determines that the maximum transmission power field indicates a PSD, i.e., when a value of the maximum transmission power interpretation subfield in the transmission power information field is 1 or 3, the first receiving end device determines the number P of first information #2 pieces based on a maximum transmission power count subfield in the transmission power information field, and determines the number Q of second information pieces based on an extension transmission power number (EHT) field, and P is greater than 0.The first operational BSS channel bandwidth differs from the second operational BSS channel bandwidth. In this case, the second receiving end device can compare the value of a sum of P and Q and the number (i.e., the first value) of fundamental channels in the second operational BSS channel bandwidth to determine the indicated bandwidth, to determine, based on the meaning of the indicated bandwidth and the P pieces of first information #2 and the Q pieces of second information, the maximum transmission PSDs corresponding to some or all of the fundamental channels in the second operational BSS channel bandwidth. Petition 870260064973, dated 01 / 07 / 2026, page 86 / 194 77 / 92

[242] Optionally, when the maximum transmission power interpretation subfield indicates that the maximum transmission power field indicates an EIRP, i.e., when a value of the maximum transmission power interpretation subfield is 0 or 2, the second receiving end device determines, based on a maximum transmission power count subfield in the transmission power information field, subfields included in the maximum transmission power field and determines, based on the maximum transmission power field, the EIRP corresponding to the channel.

[243] Based on the technical solution, the P first information pieces #2 are defined to indicate the maximum transmission PSDs corresponding to some or all of the fundamental channels in the first BSS operational channel bandwidth, and the Q second information pieces are defined by projecting the indicated bandwidth, so that the P first information pieces #2 and the Q second information pieces can indicate the maximum transmission PSDs corresponding to some or all of the fundamental channels in the second BSS operational channel bandwidth, so that different types of receiving end devices, for example, an EHT station and a non-EHT station, can obtain, based on the first element #2, the maximum transmission PSDs corresponding to the fundamental channels in their own BSS operational channel bandwidths.In this solution, a plurality of frame types or elements cannot be additionally defined to indicate the maximum transmission PSDs corresponding to the fundamental channels at different BSS operational channel bandwidths, so that transmission overheads are reduced when the maximum transmission PSDs correspond to the two types of BSS operational channel bandwidths. Petition 870260064973, dated 01 / 07 / 2026, page 87 / 194 78 / 92 are reliably indicated. Furthermore, the value of P is indicated based on third-party information, and the design of first-party information #2 is more flexible; that is, the way of indicating the first operational channel bandwidth of BSS is more flexible.

[244] In the power indication method described in Figures 2 to 5, the N first information pieces #1 can be used to simultaneously indicate the maximum transmission PSDs corresponding to some or all fundamental channels in the first operational BSS channel bandwidth and the second operational BSS channel bandwidth. In the power indication method described in Figures 6 and 7, the P first information pieces #2 and the Q second information pieces can be used to simultaneously indicate the maximum transmission PSDs corresponding to some or all fundamental channels in the first operational BSS channel bandwidth and the second operational BSS channel bandwidth. In one possible implementation, the two previous power indication methods can be used in combination.For example, the transmitting end device may send information to the receiving end device indicating whether the number of information corresponding to the fundamental channels in the first operational BSS channel bandwidth is equal to the number of fundamental channels in the first operational BSS channel bandwidth. If the information indicates that the two numbers are equal, this may indicate that the first frame sent by the transmitting end device was designed using the first indication method. If the information indicates that the two numbers are not equal, this may indicate that the first frame sent by the transmitting end device was designed using the second indication method. This is not particularly limited in this application. Petition 870260064973, dated 01 / 07 / 2026, page 88 / 194 79 / 92

[245] The foregoing describes, with reference to Figures 2 to 7, the method of indicating information provided in embodiments of this application. The foregoing, with reference to Figures 8 to 10, describes a communication apparatus provided in embodiments of this application. In one possible implementation, the apparatus is configured to implement the steps or procedures corresponding to the receiving end device in the preceding method embodiments. In another possible implementation, the apparatus is configured to implement the steps or procedures corresponding to the transmitting end device in the preceding method embodiments.

[246] Figure 8 is a schematic block diagram of a communication apparatus 800, according to an embodiment of this application. As shown in Figure 8, the apparatus 800 may include a communication unit 810 and a processing unit 820. The communication unit 810 may communicate with an external device, and the processing unit 820 is configured to process data. The communication unit 810 may additionally be referred to as a communication interface or transceiver unit.

[247] In one possible design, device 800 can implement the steps or procedures performed by the transmit end device in the previous method embodiments. Processing unit 820 is configured to perform operations related to processing the transmit end device in the previous method embodiments, and communication unit 810 is configured to perform operations related to sending the transmit end device in the previous method embodiments.

[248] In another possible project, the 800 device can implement the Petition 870260064973, dated 01 / 07 / 2026, page 89 / 194 80 / 92 steps or procedures performed by the first receiving end device in the previous method modes. Communication unit 810 is configured to perform operations related to receiving from the first receiving end device in the previous method modes, and processing unit 820 is configured to perform operations related to processing from the first receiving end device in the previous method modes.

[249] In yet another possible design, device 800 may implement the steps or procedures performed by the second receiving end device in the previous method embodiments. Communication unit 810 is configured to perform operations related to receiving from the second receiving end device in the previous method embodiments, and processing unit 820 is configured to perform operations related to processing from the second receiving end device in the previous method embodiments.

[250] It should be understood that the 800 device presented in the present invention is presented in the form of a functional unit. The term unit in the present invention may refer to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (for example, a shared processor, a dedicated processor or a group processor) configured to execute one or more software or firmware programs, a memory, a merged logic circuit and / or other suitable component that supports the described function. In an optional example, a person skilled in the art may understand that the 800 device may specifically be the transmission end device in Petition 870260064973, dated 01 / 07 / 2026, pages 90 / 194 81 / 92 prior embodiments, and can be configured to perform the procedures and / or steps corresponding to the transmitting end device in the prior method embodiments. Alternatively, device 800 can specifically be the receiving end device in the prior embodiments and can be configured to perform the procedures and / or steps corresponding to the receiving end device in the prior method embodiments. To avoid repetition, the details are not described again in the present invention.

[251] The 800 device in each of the previous solutions has the function of implementing the corresponding steps performed by the transmitting end device in the previous method, or the 800 device in each of the previous solutions has the function of implementing the corresponding steps performed by the receiving end device in the previous method. The function may be implemented by hardware or by hardware running the corresponding software. The hardware or software includes one or more modules corresponding to the previous functions.For example, the communication unit can be replaced by a transceiver (for example, a sending unit in the communication unit can be replaced by a transmitter, and a receiving unit in the communication unit can be replaced by a receiver), and another unit, such as the processing unit, can be replaced by a processor, so as to separately perform a sending and receiving operation and a related processing operation in each method embodiment.

[252] Furthermore, the communication unit may alternatively be a transceiver circuit (for example, it may include a receiving circuit and a sending circuit), and the processing unit may be a processing circuit. In this embodiment of the present application, the apparatus of Figure 8 Petition 870260064973, dated 01 / 07 / 2026, page 91 / 194 82 / 92 can be the AP or STA in the previous embodiments, or it can be a chip or a system-on-chip, for example, a system on a chip (SoC). The communication unit can be an input / output circuit or a communication interface. The processing unit is a processor, a microprocessor, or an integrated circuit integrated into the chip. This is not limited to the present invention.

[253] Figure 9 is a schematic block diagram of a communication apparatus 900, according to an embodiment of this application. The apparatus 900 includes a processor 910 and a transceiver 920. The processor 910 and the transceiver 920 communicate via an internal connection path. The processor 910 is configured to execute instructions, controlling the transceiver 920 to send and / or receive a signal.

[254] Optionally, the 900 device may additionally include a 930 memory. The 930 memory communicates with the 910 processor and the 920 transceiver via an internal connection path. The 930 memory is configured to store instructions, and the 910 processor can execute the instructions stored in the 930 memory. In one possible implementation, the 900 device is configured to implement procedures and steps corresponding to the transmitting end device in the prior method mode. In another possible implementation, the 900 device is configured to implement procedures and steps corresponding to the receiving end device in the prior method mode.

[255] It should be understood that the 900 apparatus may specifically be the transmitting end device or the receiving end device in the preceding embodiments, or it may be a chip or a system of chips. Correspondingly, the 920 transceiver may be a chip transceiver circuit. This is not limited to the present invention. Specifically, Petition 870260064973, dated 01 / 07 / 2026, page 92 / 194 83 / 92 The 900 device can be configured to perform the steps and / or procedures corresponding to the transmitting end device or the receiving end device in the previous method modes. Optionally, the 930 memory may include a read-only memory and a random-access memory, and provide instructions and data for the processor. A portion of the memory may additionally include non-volatile random-access memory. For example, the memory may additionally store information about a device type. The 910 processor can be configured to execute the instructions stored in memory. When the 910 processor executes the instructions stored in memory, the 910 processor is configured to perform the steps and / or procedures of the method mode corresponding to the transmitting end device or the receiving end device.

[256] In an implementation process, the steps of the previous methods can be implemented using a hardware integrated logic circuit in the processor or using instructions in software. The steps of the method described with reference to the embodiments of this application can be performed directly by a hardware processor or can be performed using a combination of hardware in the processor and a software module. A software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or a register. The storage medium is located in memory, and a processor reads the information in memory and completes the steps of the previous methods in combination with the processor hardware. To avoid Petition 870260064973, dated 01 / 07 / 2026, page 93 / 194 84 / 92 repetitions, the details are not described again in the present invention.

[257] It should be noted that the processor, in some embodiments of this application, may be an integrated circuit chip and possess signal processing capability. In an implementation process, the steps of the preceding method embodiments may be implemented using a hardware integrated logic circuit in the processor or using instructions in software. The processor may be a general-purpose processor, a digital signal processor (DSP), a particular application integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The processor, in some embodiments of this application, may implement or perform the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional or similar processor.The steps of the method disclosed with reference to the embodiments of this application can be performed directly by a hardware decoding processor or can be performed using a combination of hardware in the decoding processor and a software module. A software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or a register. The storage medium is located in memory, and a processor reads the information in memory and completes the steps of the preceding methods in combination with the processor hardware.

[258] It can be understood that memory, in the modalities of this request, Petition 870260064973, dated 01 / 07 / 2026, page 94 / 194 85 / 92 memory can be volatile or non-volatile memory, or it can include both volatile and non-volatile memory. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EPROM), or flash memory. Volatile memory can be random access memory (RAM), used as an external cache.By way of example, but not by way of exhaustive description, many forms of RAM can be used, for example, static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchlink dynamic random access memory (SLDRAM), and direct Rambus dynamic random access memory (DR RAM). It should be noted that the memory of the systems and methods described in this descriptive report includes, among others, these memories and any other appropriate type of memory.

[259] It should be noted that when the processor is a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, the memory (storage module) may be integrated into the processor. It should be further noted that the memory described in this descriptive report is intended to include, among others, such memories and any other appropriate type of memory. Petition 870260064973, dated 01 / 07 / 2026, pages 95 / 194 86 / 92

[260] Figure 10 is a diagram of a 1000 chip system according to an embodiment of this application. The 1000 chip system (or it may also be called a processing system) includes a 1010 logic circuit and an input / output interface 1020.

[261] The logic circuit 1010 can be a processing circuit in the chip system 1000. The logic circuit 1010 can be coupled and connected to a storage unit and invoke instructions in the storage unit, so that the chip system 1000 can implement the methods and functions in embodiments of this order. The input / output interface 1020 can be an input / output circuit in the chip system 1000 and outputs information processed by the chip system 1000, or inserts data to be processed or signaling to the chip system 1000 for processing.

[262] Specifically, for example, if chip system 1000 is installed in the transmit end device, logic circuit 1010 will be coupled to input / output interface 1020, and logic circuit 1010 can send a first frame through input / output interface 1020, wherein the first frame can be generated by logic circuit 1010. For another example, if chip system 1000 is installed in the final receive end device, logic circuit 1010 will be coupled to input / output interface 1020, logic circuit 1010 can receive a first frame through input / output interface 1020, and logic circuit 1010 will determine a maximum PSD transmission power based on the first frame.

[263] In one solution, the 1000 chip system is configured to implement the operations performed by the transmission end device in the previous method modes. Petition 870260064973, dated 01 / 07 / 2026, pages 96 / 194 87 / 92

[264] For example, logic circuit 1010 is configured to implement operations related to processing performed by the transmit end device in previous method modes, for example, the operations related to processing performed by the transmit end device in the mode shown in Figures 2 to 7, and input / output interface 1020 is configured to implement operations related to sending and / or receiving performed by the transmit end device in previous method modes, for example, the operations related to processing performed by the transmit end device in the mode shown in Figures 2 to 7.

[265] In another solution, the chip system 1000 is configured to implement operations performed by the first receiving end device in the previous method mode.

[266] For example, logic circuit 1010 is configured to implement processing-related operations performed by the first receiving end device in the previous method modes, for example, the processing-related operations performed by the first receiving end device in the mode shown in Figures 2 to 7, and input / output interface 1020 is configured to implement sending and / or receiving-related operations performed by the first receiving end device in the previous method modes, for example, the processing-related operations performed by the first receiving end device in the mode shown in Figures 2 to 7.

[267] In another solution, the chip system 1000 is configured to implement operations performed by the second device of Petition 870260064973, dated 01 / 07 / 2026, page 97 / 194 88 / 92 receiving end in the previous method mode.

[268] For example, logic circuit 1010 is configured to implement operations related to processing performed by the second receiving end device in the previous method modes, for example, the operations related to processing performed by the second receiving end device in the mode shown in Figures 2 to 7, and input / output interface 1020 is configured to implement operations related to sending and / or receiving performed by the second receiving end device in the previous method modes, for example, the operations related to processing performed by the second receiving end device in the mode shown in Figures 2 to 7.

[269] In addition, this application further provides a computer-readable storage medium. The computer-readable storage medium stores computer instructions. When the computer instructions are executed on a computer, operations and / or procedures performed by the transmitting end device or the receiving end device in method embodiments of this application are performed.

[270] This application further provides a computer program product. The computer program product includes computer program code or instructions. When the computer program code or instructions are executed on a computer, an operation and / or a procedure is performed by the transmitting end device or the receiving end device in method embodiments of this application.

[271] In addition, this application provides further a system of Petition 870260064973, dated 01 / 07 / 2026, pp. 98 / 194 89 / 92 communication, including the transmitting end device and the receiving end device in the modalities of this application.

[272] It should be further noted that the memory described in this descriptive report is intended to include, but is not limited to, these memories and any other suitable type of memory.

[273] A person skilled in the art may be aware that, in combination with the examples described in the embodiments disclosed in this descriptive report, algorithm units and steps may be implemented by electronic hardware or a combination of software and electronic hardware. Whether the functions are performed by hardware or software depends on specific applications and the design constraints of the technical solutions. A person skilled in the art may use different methods to implement the described functions for each particular application, but it should not be considered that the implementation goes beyond the scope of this application. It may be clearly understood by a person skilled in the art that, for the purposes of convenient and brief description, for a detailed working process of the above system, apparatus and unit, refer to a corresponding process in the previous method embodiments. The details are not described again in the present invention.In the various embodiments provided in this application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the described embodiment of the apparatus is merely an example. For example, the division into units is merely a logical function division and may be another division in the actual implementation. For example, a plurality of units or components may be combined or integrated into another system, or some attributes may be ignored or not performed. Furthermore, the mutual or direct couplings or communication connections exhibited may also be omitted. Petition 870260064973, dated 01 / 07 / 2026, page 99 / 194 The 90 / 92 models discussed can be implemented using several interfaces. Indirect couplings or communication connections between devices or units can be implemented in electronic, mechanical, or other forms. The units described as separate parts may or may not be physically separated, and the parts displayed as units may or may not be physical units; they may be located in one position or distributed across a plurality of network units. Some or all of the units may be selected based on the actual requirements to achieve the objectives of the embodiments' solutions. Furthermore, the functional units in the embodiments of this application may be integrated into a processing unit, each of the units may exist physically independently, or two or more units may be integrated into a single unit.

[274] When functions are implemented in the form of a functional software unit and sold or used as a standalone product, the functions may be stored on a computer-readable storage medium. Based on this understanding, the technical solutions of this application, essentially, or the part that contributes to a conventional technology, or some of the technical solutions, may be implemented in the form of a software product. The software product is stored on a storage medium and includes various instructions to instruct a computer device (which may be a personal computer, a server, or a network device) to perform all or some of the steps of the methods described in the embodiments of this application. The storage medium mentioned includes any medium that can store program code, such as a USB flash drive, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk. Petition 870260064973, dated 01 / 07 / 2026, pp. 100 / 194 91 / 92

[275] It should be understood that a modality mentioned throughout this descriptive report means that specific attributes, structures, or features related to that modality are included in at least one modality of this application. Therefore, the modalities throughout the descriptive report do not necessarily refer to the same modality. Furthermore, these specific attributes, structures, or features may be combined in one or more modalities in any appropriate manner.

[276] It should be further understood that ordinal numerals such as first and second, mentioned in the modalities of this application, are used to distinguish between a plurality of objects and are not intended to limit sizes, content, sequence, temporal sequence, priorities, degrees of importance or the like of the plurality of objects. For example, first information and second information do not indicate a difference in quantity of information, content, priority, importance or the like.

[277] It should be further understood that, in this application, both when and when mean that a network element performs the corresponding processing in an objective situation, but do not constitute a time limitation, do not require the network element to have a determination action during implementation, and do not imply other limitations.

[278] It should be further understood that, in this application, at least one refers to one or more, and a plurality of refers to two or more. At least one item (piece) of the following or a similar expression means any combination of these items, including any combination of items (pieces) in the singular or plural. For example, at least one of a, b or c may represent a, b, c, aeb, aec, bec, or a, be c.

[279] It should be noted that, unless otherwise specified, an expression used in this request is similar to an expression that says an item. Petition 870260064973, dated 01 / 07 / 2026, pp. 101 / 194 92 / 92 includes one or more of the following: A, B, and C generally means that the item can be any of the following: A; B; C; A and B; A and C; B and C; A, B, and C; A and A; A, A, and A; A, A, and B; A, A, and B; A, B, and B; A, C, and C; B and B; B, B, and B; B, B, and C; C and C; C, C, and C; and another combination of A, B, and C. In the previous descriptions, three elements A, B, and C are used as an example to describe an optional case of the item. When an expression is the item includes at least one of the following: A, B, ... and X, that is, more elements are included in the expression, a case to which the item is applicable can also be obtained according to the previous rule.

[280] It should be understood that the term and / or in this descriptive report describes only an association relationship between associated objects and represents the possibility of there being three relationships. For example, A and / or B can represent the following three cases: Only A exists, A and B exist, and only B exists. A and B can be singular or plural. The character / usually indicates an OR relationship between the associated objects. For example, A / B indicates A or B.

[281] It should be further understood that, in embodiments of this application, B corresponding to A indicates that B is associated with A, and B can be determined based on A. However, it should be further understood that determining B based on A does not mean that B is determined based solely on A. B may alternatively be determined based on A and / or other information.

[282] The descriptions above are merely specific implementations of this application, but are not intended to limit the scope of protection of this application. Any variation or substitution easily understood by a person skilled in the art, within the technical scope disclosed in this application, will be covered by the scope of protection of this application. Therefore, the scope of protection of this application will be subject to the scope of protection of the claims. Petition 870260064973, dated 01 / 07 / 2026, page 102 / 194

Claims

1 / 5 CLAIMS 1. A communication method, characterized in that the method comprises: receiving a first frame, wherein the first frame comprises a first element, the first element comprises P pieces of first information and Q pieces of second information, the P pieces of first information indicate, respectively, the maximum transmission power spectral densities (PSDs) corresponding to P fundamental channels, the P fundamental channels are some or all of the fundamental channels in a first operational channel bandwidth of the basic services set, the Q pieces of second information indicate, respectively, the maximum transmission PSDs corresponding to the fundamental channels in a given bandwidth, excluding the P fundamental channels, and P and Q are positive integers;The first element additionally comprises third and fourth pieces of information; the third pieces of information indicate a value of P, and the fourth pieces of information indicate a value of Q; and the indicated bandwidth is related to a value of M and to a second operational channel bandwidth of the basic services set; the second operational channel bandwidth of the basic services set is different from the first operational channel bandwidth of the basic services set; M is equal to a sum of P and Q, and M is a positive integer; and determine, based on the first frame, the maximum transmission PSDs corresponding to the fundamental channels in the first operational channel bandwidth of the basic services set.

2. Method, according to claim 1, characterized in that the fundamental channels in the second operational channel bandwidth of the core services suite comprise the fundamental channels in Petition 870250049238, dated 12 / 06 / 2025, page 107 / 130 2 / 5 first operational channel bandwidth of the core services suite.

3. Method, according to claim 1 or 2, characterized in that the P pieces of initial information are sequentially ordered in ascending order of frequencies of the corresponding fundamental channels.

4. A method, according to any one of claims 1 to 3, characterized in that the Q pieces of second information are sequentially ordered in ascending order of frequencies of the corresponding fundamental channels.

5. A method according to any one of claims 1 to 4, characterized in that M is equal to a first value, the indicated bandwidth is the second operational channel bandwidth of the core service set, and the first value is a number of fundamental channels comprised within the second operational channel bandwidth of the core service set.

6. A method according to any one of claims 1 to 4, characterized in that M is less than a first value, the indicated bandwidth is Z primary megahertz in the second operational channel bandwidth of the core services set, Z is equal to M multiplied by a fundamental channel bandwidth, and the first value is a number of fundamental channels comprised in the second operational channel bandwidth of the core services set.

7. Method, according to any one of claims 1 to 4, characterized in that M is greater than a first value, the indicated bandwidth is greater than the second operational channel bandwidth of the basic service set, the first S pieces of information in M ​​pieces of information in the total of the P pieces of first information and the Q pieces of second information indicate, respectively, the maximum transmission PSDs corresponding to S fundamental channels comprised in the second operational channel bandwidth of the basic service set, S is a positive integer, the first value is a number of fundamental channels comprised in the second operational channel bandwidth of the basic service set and S is greater than P.

8. Method, according to claim 7, characterized in that an (S+1)-th piece of information for an (P+Q)-th piece of information in the M pieces of information in the total of the P pieces of first information and the Q pieces of second information are reserved.

9. A method, according to any one of claims 1 to 8, characterized in that the fundamental channel bandwidth size is 20 megahertz MHz.

10. A method according to any one of claims 1 to 9, characterized in that the first element additionally comprises a maximum transmission power interpretation field, and a value of the maximum transmission power interpretation field is 1 or 3.

11. A method according to any one of claims 1 to 10, characterized in that the first element is a transmission power envelope element.

12. A method, according to any one of claims 1 to 11, characterized in that the first basic service set operating channel bandwidth is a basic service set operating channel bandwidth without extremely high throughput (EHT), and the second basic service set operating channel bandwidth is an EHT basic service set operating channel bandwidth. Petition 870250049238, dated 12 / 06 / 2025, pp. 109 / 130 4 / 5 13. A method, according to any one of claims 1 to 12, characterized in that the value of M is 2 raised to the power of m, where is an integer greater than or equal to 0.

14. Communication apparatus, characterized in that the apparatus comprises a transceiver unit and a processing unit; the transceiver unit is configured to receive a first frame, wherein the first frame comprises a first element, the first element comprises P pieces of first information and Q pieces of second information, the P pieces of first information indicate, respectively, the maximum transmission power spectral densities (PSDs) corresponding to P fundamental channels, the P fundamental channels are some or all of the fundamental channels in a first operational channel bandwidth of the basic services set, the Q pieces of second information indicate, respectively, the maximum transmission PSDs corresponding to the fundamental channels in a given bandwidth, excluding the P fundamental channels, and P and Q are positive integers;The first element additionally comprises third and fourth pieces of information; the third pieces of information indicate a value of P, and the fourth pieces of information indicate a value of Q; and the indicated bandwidth is related to a value of M and to a second operational channel bandwidth of the basic services set; the second operational channel bandwidth of the basic services set is different from the first operational channel bandwidth of the basic services set; M is equal to a sum of P and Q, and M is a positive integer; and the processing unit is configured to determine, based on the first frame, the maximum transmission PSDs corresponding to the fundamental channels in the first operational channel bandwidth of the basic services set.

15. Communication apparatus, characterized in that it comprises a processor, configured to execute computer instructions stored in a memory, such that the apparatus performs the method defined in any one of claims 1 to 13.

16. Computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions and, when the computer instructions are executed on a computer, the method defined in any one of claims 1 to 13 is performed.

17. Chip, characterized in that the chip comprises a processor and a communication interface, and the processor reads, through the communication interface, instructions stored in a memory, to perform the method defined in any one of claims 1 to 13.

18. Communication apparatus, characterized in that it comprises a processor, configured to execute instructions stored in a memory, such that the apparatus performs the method defined in any one of claims 1 to 13.

19. Device according to claim 18, characterized in that the device additionally comprises memory. Petition 870250049238, dated 12 / 06 / 2025, pp. 111 / 130

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