Method and associated apparatus for determining transmit power in a wireless local area network - Patents.com

Abstract

The present application relates to the field of wireless communications, particularly as applied to wireless local area networks supporting 802.11 series standards, and in particular to a method and related apparatus for determining transmission power in a wireless local area network. The method includes: a station receives a trigger frame from a first access point, the trigger frame is used to trigger the station to transmit a TB PPDU and indicate resource units allocated to the station. The station selects some resource units from the allocated resource units based on a channel busy / idle state detected by sensing to transmit the TB PPDU, and calculates the transmission power of the station based on a ratio of the selected resource units to the allocated resource units. The station transmits the TB PPDU in the selected resource units with the transmission power. According to an embodiment of the present application, in a scenario in which the station transmits using some RU / MRUs among the allocated MRU / RUs, the transmission power of the station can be reduced to reduce the station's interference to other devices.

Description

[Technical field]

[0001] This application claims priority to Chinese Patent Application No. 202110657250.2, entitled “Method and Related Apparatus for Determining Transmission Power in Wireless Local Area Networks,” filed with the China State Intellectual Property Administration on June 11, 2021, the entirety of which is incorporated herein by reference.

[0002] The present application relates to the field of wireless communication technologies, and in particular to a method and related apparatus for determining transmission power in a wireless local area network. [Background technology]

[0003] Wireless local area networks (WLANs) have been developed for many generations including 802.11a / b / g, 802.11n, 802.11ac, and 802.11ax, with 802.11be under consideration. The 802.11ax standard is sometimes referred to as the high efficiency (HE) standard, and the 802.11be standard is sometimes referred to as the extremely high throughput (EHT) standard or Wi-Fi 7 standard.

[0004] For uplink data transmission, a station (STA) may perform uplink data transmission after obtaining a transmission opportunity (TXOP) through channel contention, for example, in an enhanced distributed channel access (EDCA) manner. In the 802.11ax standard, a trigger frame-based uplink scheduling transmission method is further introduced. A trigger frame transmitted by an access point (AP) is used to schedule one or more STAs to perform uplink data transmission. A user information field of the trigger frame includes a resource unit (RU) allocation subfield indicating a specific location of an RU allocated to the station. The 802.11be standard also includes a trigger frame-based uplink scheduling transmission method. This method is similar to the trigger frame-based uplink scheduling transmission method in the 802.11ax standard. The difference lies in that some signaling indications, for example, RU allocation in 320 MHz, are added or extended. It should be noted that in the 802.11ax standard, only one RU can be assigned to one STA. However, the 802.11be standard allows multiple RUs to be assigned to one STA. Assigning multiple RUs to one STA can also be understood as combining multiple RUs and assigning multiple RUs to one STA.

[0005] Currently, in the trigger frame-based uplink scheduling transmission method, the concept of adaptive RU (adapted / adaptive RU) is proposed. Specifically, the triggered station may adaptively select some RUs (these RUs are adaptive RUs) from the RU or multiple RUs (MRUs) allocated to the station by the AP using the trigger frame to transmit the trigger based physical layer protocol data unit (TB PPDU) based on the channel busy / idle state detected by sensing, to avoid the channel detected as busy. This reduces the collision probability and improves the spectrum utilization. However, how to determine the transmission power of the station when the station transmits the TB PPDU using the adaptive RU has not been resolved. Summary of the Invention [Means for solving the problem]

[0006] To solve the problem of determining the transmission power of a station in a scenario in which the station transmits using a portion of the assigned MRU / RUs, the embodiment of the present application provides a method and related apparatus for determining the transmission power in a wireless local area network, which reduces the station's interference to other devices and controls the power of receiving TB PPDUs by the AP within the controllable range of the AP.

[0007] The following describes the present application from different aspects, and it should be understood that cross-reference may be made to the following embodiments and the beneficial effects of different aspects.

[0008] According to a first aspect, the present application provides a method for determining a transmission power in a wireless local area network. The method includes: a station receives a trigger frame from a first access point, the trigger frame being used to trigger the station to transmit a TB PPDU. The station transmits the TB PPDU at a first transmission power. The trigger frame indicates a first resource unit assigned to the station. The trigger frame includes an AP transmission power subfield and an uplink target received power subfield. The second resource unit occupied by the TB PPDU is all or a part of the resource units in the first resource unit. The first transmission power is determined based on an indication of the AP transmission power subfield, an indication of the uplink target received power subfield, the second resource unit, and the first resource unit.

[0009] It can be seen that in this solution, the transmission power of the station is jointly determined with reference to the resource unit initially allocated to the station (i.e., the first resource unit) and the resource unit actually used by the station (i.e., the second resource unit), which solves the transmission power problem of the station in the scenario where the station transmits using some RUs among the allocated MRU / RUs, reduces the station's interference to other devices, and can control the power of receiving TB PPDU by the AP within the controllable range of the AP.

[0010] According to a second aspect, the present application provides a method for determining a transmission power in a wireless local area network. The method includes a first access point transmitting a trigger frame and receiving a TB PPDU from a station. The trigger frame indicates a first resource unit allocated to the station. The trigger frame includes an AP transmission power subfield and an uplink target received power subfield. The second resource unit occupied by the TB PPDU is a full or partial resource unit among the first resource units. The power at which the TB PPDU is received by the first access point is determined based on the first transmission power and a path loss from the first access point to the station. The first transmission power is determined based on an indication of the AP transmission power subfield, an indication of the uplink target received power subfield, the second resource unit, and the first resource unit.

[0011] Optionally, the power at which the TB PPDU is received by the first access point is the difference between the first transmit power and the path loss from the first access point to the station.

[0012] According to a third aspect, the present application provides a communication device. The communication device may be a station or a chip in the station, for example a Wi-Fi chip. The communication device includes a first unit configured to receive a trigger frame, the trigger frame indicating a first resource unit allocated to the station, the trigger frame including an access point AP transmit power subfield and an uplink target receive power subfield. The first unit is further configured to transmit a trigger-based physical layer protocol data unit TB PPDU at the first transmit power. The second resource unit occupied by the TB PPDU is all or a part of the resource units in the first resource unit. The first transmit power is determined based on an indication of the AP transmit power subfield, an indication of the uplink target receive power subfield, the second resource unit, and the first resource unit. The first unit may be implemented using a communication interface or a transceiver.

[0013] Optionally, the communication device further includes a processing unit configured to generate a TB PPDU.

[0014] Optionally, the communications apparatus further includes a processing unit configured to determine the first transmit power based on the indication of the AP transmit power subfield, the indication of the uplink target received power subfield, the second resource unit, and the first resource unit.

[0015] According to a fourth aspect, the present application provides a communication device. The communication device may be a first access point or a chip in the first access point, for example a Wi-Fi chip. The communication device includes a second unit configured to transmit a trigger frame. The trigger frame indicates a first resource unit allocated to the station, and the trigger frame includes an access point AP transmit power subfield and an uplink target receive power subfield. The second unit is further configured to receive a TB PPDU. The power at which the TB PPDU is received is determined based on the first transmit power and a path loss from the first access point to the station, and the first transmit power is determined based on an indication of the AP transmit power subfield, an indication of the uplink target receive power subfield, the second resource unit, and the first resource unit. The second unit may be implemented using a communication interface or a transceiver.

[0016] Optionally, the communication device further comprises a processing unit configured to generate the trigger frame.

[0017] In a possible implementation of any one of the aforementioned aspects, the first transmission power is determined based on a value indicated by the AP transmission power subfield, a value indicated by the uplink target received power subfield, a size of the second resource unit, and a size of the first resource unit.

[0018] Optionally, the first transmission power is determined based on an indication of the AP transmission power subfield, an indication of the uplink target received power subfield, and a ratio of a size of the second resource unit to a size of the first resource unit.

[0019] It can be seen that this solution provides a scheme to jointly determine the transmit power of the stations using the ratio between the resource units initially allocated to the stations (i.e., the first resource units) and the resource units actually used by the stations (i.e., the second resource units).

[0020] Optionally, the size of the first resource unit is determined based on a total number of subcarriers included in the first resource unit, and the size of the second resource unit is determined based on a total number of subcarriers included in the second resource unit.

[0021] Optionally, the size of the first resource unit is a bandwidth of the first resource unit and the size of the second resource unit is a bandwidth of the second resource unit.

[0022] Optionally, the log domain representation of the first transmit power is:

number

[0023]

number

[0024] It can be seen that this solution provides a specific scheme for calculating the transmission power of the station, and the transmission power of the station is reduced, which reduces the interference of the station to other devices and can control the power of receiving TB PPDU by the AP within the controllable range of the AP.

[0025] Optionally, the size of the first resource unit is determined based on the number of first bandwidth sizes included in the bandwidth of the first resource unit, and the size of the second resource unit is determined based on the number of first bandwidth sizes included in the bandwidth of the second resource unit, the first bandwidth size being any one of the following: 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz.

[0026] Optionally, the log domain representation of the first transmit power is:

number

[0027]

number

[0028] Optionally, the bandwidth of the first resource unit is from the lowest frequency of the first resource unit to the highest frequency of the first resource unit and the bandwidth of the second resource unit is from the lowest frequency of the second resource unit to the highest frequency of the second resource unit, or the bandwidth of the first resource unit is the sum of the bandwidth occupied by one or more resource units included in the first resource unit and the bandwidth of the second resource unit is the sum of the bandwidth occupied by one or more resource units included in the second resource unit.

[0029] It can be seen that this solution provides another specific scheme for calculating the transmit power of a station, which is implemented using the bandwidth of a resource unit.

[0030] In a possible implementation of any one of the aforementioned aspects, the trigger frame further includes indication information, and the indication information indicates a manner of determining the first transmission power. The manner of determining the first transmission power includes one or more of the following, namely, one or more of a first determination manner, a second determination manner, and a third determination manner. The first determination manner is to determine based on a value indicated by the AP transmission power subfield, a value indicated by the uplink target received power subfield, a total number of subcarriers included in the second resource unit, and a total number of subcarriers included in the first resource unit. The second determination manner is to determine based on a value indicated by the AP transmission power subfield, a value indicated by the uplink target received power subfield, a number of first bandwidth sizes included in the bandwidth of the second resource unit, and a number of first bandwidth sizes included in the bandwidth of the first resource unit. The third determination manner is to determine based on an indication of the AP transmission power subfield and an indication of the uplink target received power subfield.

[0031] Optionally, the indication information is placed in a common information field or a user information field of the trigger frame.

[0032] In this solution, instruction information is carried in the trigger frame to indicate how the station should calculate its transmission power, so that the first access point can manage and control the station more effectively.

[0033] According to a fifth aspect, the present application provides a method for determining a transmission power based on spatial reuse. The method includes: a second access point receives a Parameterized Spatial Reuse Reception (PSRR) PPDU including a trigger frame. The trigger frame indicates a first resource unit assigned to the station. The second access point determines a second resource unit occupied by a TB PPDU transmitted by the station. The second resource unit is a portion of the first resource units. The second access point transmits a PSRT PPDU at a transmission power of the Parameterized Spatial Reuse Transmission (PSRT) PPDU. The transmission power of the PSRT PPDU is determined based on the first resource unit, the second resource unit, an indication of an EHT Parameterized Spatial Reuse (PSR) field included in the TB PPDU, and / or an indication of an EHT uplink (UL) PSR field included in the trigger frame, and a reception power at which the PSRR PPDU is received by the second access point.

[0034] It can be seen that in this solution, the transmission power of the PSRT PPDU is jointly determined using the resource units initially allocated to the station (i.e., the first resource units), the resource units actually used by the station (i.e., the second resource units), and the EHT PSR / EHT UL PSR, which can solve the transmission power problem of the PSRT PPDU when the station adopts spatial reuse in the adaptive RU transmission scenario, so that the second access point obtains a greater gain.

[0035] According to a sixth aspect, the present application provides a communication device. The communication device may be a second access point or a chip in the second access point, for example a Wi-Fi chip. The communication device includes a second unit configured to receive a PSRR PPDU including a trigger frame, the trigger frame indicating a first resource unit allocated to the station, and a processing unit configured to determine a second resource unit occupied by a TB PPDU transmitted by the station, the second resource unit being a part of the first resource units. The second unit is further configured to transmit the PSRT PPDU at a transmission power of the PSRT PPDU. The transmission power of the PSRT PPDU is determined based on the first resource unit, the second resource unit, an indication of the EHT PSR field included in the TB PPDU, and / or an indication of the EHT UL PSR field included in the trigger frame, and a reception power of receiving the PSRR PPDU by the second access point.

[0036] In a possible implementation of the fifth or sixth aspect, the transmission power of the PSRT PPDU is equal to or less than the difference between the PSR value and the reception power of the PSRR PPDU received by the second access point. The PSR value is determined based on the first resource unit, the second resource unit, an indication of the EHT parameterized spatial reuse PSR field included in the TB PPDU, and / or an indication of the EHT uplink parameterized spatial reuse UL PSR field included in the trigger frame. It should be understood that the PSR value here may be the PSR value of the total bandwidth (here, the bandwidth for transmitting the PSRR PPDU).

[0037] It can be seen that this solution provides a way to calculate the transmission power of the PSRT PPDU in the total bandwidth in a scenario where adaptive RUs are deployed, which helps the second access point to transmit the PSRT PPDU.

[0038] In a possible implementation example of the fifth or sixth aspect, the first resource unit further includes a third resource unit, and the third resource unit is a differential set of the first resource unit and the second resource unit, in other words, the third resource unit is a resource unit that is not used for transmitting a TB PPDU within the first resource unit.

[0039] Optionally, the transmission power of the PSRT PPDU in the third resource unit is equal to or less than the difference between the PSR value of the third resource unit and the reception power of receiving the PSRR PPDU by the second access point in the third resource unit. The PSR value of the third resource unit is -26 dBm or positive infinity. Alternatively, the PSR value of the third resource unit is the sum of the value indicated by the first EHT PSR field included in the TB PPDU or the value indicated by the first EHT UL PSR field included in the trigger frame and a preset value. The first EHT PSR field / first EHT UL PSR field corresponds to the third resource unit, or the frequency indication range of the first EHT PSR field / first EHT UL PSR field includes the third resource unit, or the frequency indication range of the first EHT PSR field / first EHT UL PSR field overlaps with the third resource unit. For example, the preset value is 3 dB.

[0040] Optionally, the transmission power of the PSRT PPDU in the one 20MHz subchannel in which the third resource unit is located is equal to or less than the difference between the PSR value of the 20MHz subchannel and the receiving power of receiving the PSRR PPDU by the second access point in the 20MHz subchannel. The PSR value of the one 20MHz subchannel is -26dBm or positive infinity. Alternatively, the PSR value of the one 20MHz subchannel is the sum of the value indicated by the first EHT PSR field included in the TB PPDU or the value indicated by the first EHT UL PSR field included in the trigger frame and a preset value. The first EHT PSR field / first EHT UL PSR field corresponds to the third resource unit, or the frequency indication range of the first EHT PSR field / first EHT UL PSR field includes the third resource unit, or the frequency indication range of the first EHT PSR field / first EHT UL PSR field overlaps with the third resource unit. For example, the preset value is 3 dB.

[0041] Optionally, the PSR value of the third resource unit may be the greater of the values ​​indicated by the two EHT PSR fields included in the TB PPDU. Alternatively, the PSR value of the third resource unit may be the greater of the values ​​indicated by the two EHT UL PSR fields included in the trigger frame. Similarly, the PSR value of one 20 MHz subchannel is the greater of the values ​​indicated by the two EHT PSR fields included in the TB PPDU. Alternatively, the PSR value of one 20 MHz subchannel may be the greater of the values ​​indicated by the two EHT UL PSR fields included in the trigger frame.

[0042] It can be seen that in this solution, the second access point changes the spatial reuse read rule (at the granularity of resource units or 20 MHz subchannels) by obtaining the adaptive RU used by the station to transmit the TB PPDU in order to solve the transmission power problem of the PSRT PPDU, which can increase the transmission power of the second access point, thereby making the second access point obtain a larger gain.

[0043] According to a seventh aspect, the present application provides a method for determining a spatial reuse parameter field in a PPDU. The method includes a station receiving a PSRR PPDU including a trigger frame and transmitting a TB PPDU. The trigger frame indicates a first resource unit assigned to the station. A second resource unit occupied by the TB PPDU is a part of the first resource unit. The TB PPDU includes a first EHT PSR field and a second EHT PSR field. A value indicated by the first EHT PSR field is determined based on the first resource unit and the second resource unit. A value indicated by the second EHT PSR field is the same as a value indicated by a second EHT UL PSR field included in the trigger frame.

[0044] It can be seen that in this solution, when a station transmits a TB PPDU using an adaptive RU, the value indicated by the EHT PSR field is determined based on the resource unit initially allocated to the station (i.e., the first resource unit) and the resource unit actually used by the station (i.e., the second resource unit). This solves the design problem of the EHT PSR field in the scenario of overlapping basic service sets in addition to spatial reuse, which allows the PSRT PPDU to use larger transmission power on some resource units to obtain larger gains.

[0045] According to an eighth aspect, the present application provides a communication device. The communication device may be a station or a chip in a station, for example a Wi-Fi chip. The communication device includes a first unit configured to receive a PSRR PPDU including a trigger frame. The trigger frame indicates a first resource unit allocated to the station. The first unit is further configured to transmit a TB PPDU. The second resource unit occupied by the TB PPDU is a part of the first resource unit. The TB PPDU includes a first EHT PSR field and a second EHT PSR field. The value indicated by the first EHT PSR field is determined based on the first resource unit and the second resource unit. The value indicated by the second EHT PSR field is the same as the value indicated by the second EHT UL PSR field included in the trigger frame.

[0046] Optionally, the communication device further includes a processing unit configured to generate a TB PPDU.

[0047] Optionally, the processing unit is configured to determine, based on the first resource unit and the second resource unit, a value indicated by the first EHT PSR field.

[0048] In a possible implementation example of the seventh or eighth aspect, the first resource unit further includes a third resource unit, and the third resource unit is a differential set of the first resource unit and the second resource unit, and the frequency range of the third resource unit is equal to or greater than the frequency indication range of the first EHT PSR field included in the TB PPDU.

[0049] Optionally, the value indicated by the first EHT PSR field is −26 dBm or positive infinity.

[0050] Optionally, the value indicated by the first EHT PSR field is the sum of the value indicated by the first EHT UL PSR field included in the trigger frame and a preset value.

[0051] Optionally, the value indicated by the first EHT PSR field is a greater value of the value indicated by the first EHT UL PSR field and the value indicated by the second EHT UL PSR field included in the trigger frame.

[0052] It can be seen that in this solution, the value indicated by the EHT PSR field is modified, which solves the design problem of the EHT PSR field in the overlapping basic service set and spatial reuse scenario, solves the transmission power problem of the PSRT PPDU, and can increase the transmission power of the second access point, so that the second access point obtains a greater gain.

[0053] According to a ninth aspect, the present application provides a communication device, which may be a station or a chip within a station, such as a Wi-Fi chip, and includes a processor and a communication interface.

[0054] In one design, a communications device is configured to receive a trigger frame, the trigger frame indicating a first resource unit assigned to a station, the trigger frame including an access point (AP) transmit power subfield and an uplink target received power subfield, transmit a trigger-based physical layer protocol data unit (TB PPDU) at the first transmit power, and a second resource unit occupied by the TB PPDU is a full or partial resource unit among the first resource units. The first transmit power is determined based on an indication of the AP transmit power subfield, an indication of the uplink target received power subfield, the second resource unit, and the first resource unit.

[0055] Optionally, the processor is configured to generate a TB PPDU.

[0056] Optionally, the processor is further configured to determine the first transmit power based on the indication of the AP transmit power subfield, the indication of the uplink target received power subfield, the second resource unit, and the first resource unit.

[0057] In one design, the communications device is configured to receive a PSRR PPDU including a trigger frame, the trigger frame indicating a first resource unit allocated to the station and to transmit a TB PPDU. The second resource unit occupied by the TB PPDU is a portion of the first resource units. The TB PPDU includes a first EHT PSR field and a second EHT PSR field. A value indicated by the first EHT PSR field is determined based on the first resource unit and the second resource unit. The value indicated by the second EHT PSR field is the same as a value indicated by a second EHT UL PSR field included in the trigger frame.

[0058] Optionally, the processor is configured to generate a TB PPDU.

[0059] Optionally, the processor is further configured to determine a value indicated by the first EHT PSR field based on the first resource unit and the second resource unit.

[0060] According to a tenth aspect, the present application provides a communication device, the communication device including a processor and a communication interface.

[0061] In one design, the communication device may be a first access point or a chip in the first access point, e.g., a Wi-Fi chip. The communication device is configured to transmit a trigger frame, where the trigger frame indicates a first resource unit allocated to the station, where the trigger frame includes an access point AP transmit power subfield and an uplink target receive power subfield, and receive a TB PPDU. A power at which the TB PPDU is received is determined based on the first transmit power and a path loss from the first access point to the station, where the first transmit power is determined based on an indication of the AP transmit power subfield, an indication of the uplink target receive power subfield, the second resource unit, and the first resource unit.

[0062] Optionally, the processor is configured to generate a trigger frame.

[0063] In one design, the communication device may be a second access point or a chip, e.g., a Wi-Fi chip, in the second access point. The communication interface is configured to receive a PSRR PPDU including a trigger frame, where the trigger frame indicates a first resource unit assigned to the station. The processor is configured to determine a second resource unit occupied by a TB PPDU transmitted by the station, where the second resource unit is a portion of the first resource units. The communication interface is further configured to transmit the PSRT PPDU at a transmit power of the PSRT PPDU. The transmit power of the PSRT PPDU is determined based on the first resource unit, the second resource unit, an indication of an EHT PSR field included in the TB PPDU, and / or an indication of an EHT UL PSR field included in the trigger frame, and a receive power at which the PSRR PPDU is received by the second access point.

[0064] According to an eleventh aspect, the present application provides an apparatus, embodied in a product form of a chip, comprising an input / output interface and a processing circuit.

[0065] In one design, the apparatus is a chip in a station according to the first aspect. The input / output interface is configured to input a trigger frame received using an antenna and a radio frequency circuit, the trigger frame indicating a first resource unit allocated to the station, the trigger frame including an access point AP transmit power subfield and an uplink target receive power subfield. The input / output interface is further configured to output a TB PPDU, and transmit the TB PPDU using the antenna at the first transmit power after the TB PPDU is processed using the radio frequency circuit. The second resource unit occupied by the TB PPDU is all or a part of the resource units in the first resource unit. The first transmit power is determined based on an indication of the AP transmit power subfield, an indication of the uplink target receive power subfield, the second resource unit, and the first resource unit.

[0066] Optionally, the processing circuitry is configured to generate a TB PPDU.

[0067] Optionally, the processing circuitry is further configured to determine the first transmit power based on the indication of the AP transmit power subfield, the indication of the uplink target received power subfield, the second resource unit, and the first resource unit.

[0068] In one design, the apparatus is a chip in a station according to the seventh aspect. The input / output interface is configured to input a PSRR PPDU including a trigger frame received using the antenna and the radio frequency circuit, the trigger frame indicating a first resource unit allocated to the station. The input / output interface is further configured to output a TB PPDU, and transmit the TB PPDU using the antenna after the TB PPDU is processed using the radio frequency circuit. The second resource unit occupied by the TB PPDU is a portion of the first resource unit. The TB PPDU includes a first EHT PSR field and a second EHT PSR field. A value indicated by the first EHT PSR field is determined based on the first resource unit and the second resource unit. A value indicated by the second EHT PSR field is the same as a value indicated by a second EHT UL PSR field included in the trigger frame.

[0069] Optionally, the processing circuitry is configured to generate a TB PPDU.

[0070] Optionally, the processing circuit is further configured to determine a value indicated by a first EHT PSR field based on the first resource unit and the second resource unit.

[0071] According to a twelfth aspect, the present application provides an apparatus, embodied in a product form of a chip, comprising an input / output interface and a processing circuit.

[0072] In one design, the apparatus is a chip in a first access point according to the second aspect. The input / output interface is configured to output a trigger frame and transmit the trigger frame using an antenna after the trigger frame is processed using a radio frequency circuit. The trigger frame indicates a first resource unit allocated to the station, and the trigger frame includes an access point AP transmit power subfield and an uplink target receive power subfield. The input / output interface is further configured to input a received TB PPDU using the antenna and the radio frequency circuit. A power at which the TB PPDU is received is determined based on the first transmit power and a path loss from the first access point to the station, and the first transmit power is determined based on an indication of the AP transmit power subfield, an indication of the uplink target receive power subfield, the second resource unit, and the first resource unit.

[0073] Optionally, the processing circuitry is configured to generate a trigger frame.

[0074] In one design, the apparatus is a chip in a second access point according to the fifth aspect. The input / output interface is configured to input a PSRR PPDU including a trigger frame received using the antenna and the radio frequency circuit, where the trigger frame indicates a first resource unit assigned to the station. The processing circuit is configured to determine a second resource unit occupied by a TB PPDU transmitted by the station, where the second resource unit is a portion of the first resource units. The input / output interface is further configured to output a PSRT PPDU and transmit the PSRT PPDU using the antenna at a transmit power of the PSRT PPDU after the PSRT PPDU is processed using the radio frequency circuit. The transmit power of the PSRT PPDU is determined based on the first resource unit, the second resource unit, an indication of an EHT PSR field included in the TB PPDU, and / or an indication of an EHT UL PSR field included in the trigger frame, and a receive power at which the PSRR PPDU is received by the second access point.

[0075] According to a thirteenth aspect, the present application provides a computer readable storage medium, the computer readable storage medium storing program instructions which, when run on a computer, enable the computer to perform a method according to any one of the first aspect, the second aspect, the fifth aspect or the seventh aspect.

[0076] According to a fourteenth aspect, the present application provides a computer program product comprising program instructions, which when running on a computer, enables the computer to perform a method according to any one of the first, second, fifth and seventh aspects.

[0077] The embodiment of the present application can solve the transmission power problem of a station in a scenario where the station transmits using a part of RUs among the assigned MRU / RUs, which reduces the station's interference to other devices and controls the power of receiving TB PPDU by the AP within the controllable range of the AP.

[0078] In order to describe the technical solutions in the embodiments of the present application more clearly, the following will briefly describe the accompanying drawings used to describe the embodiments. [Brief description of the drawings]

[0079] [Figure 1] FIG. 1 is a schematic diagram of the architecture of a wireless communication system according to an embodiment of the present application. [Figure 2a] FIG. 2 is a schematic diagram of the structure of an access point according to an embodiment of the present application; [Figure 2b] FIG. 2 is a schematic diagram of a station structure according to an embodiment of the present application; [Figure 3a] FIG. 1 is a schematic diagram of a transmission of an HE TB PPDU with carrier sensing; [Figure 3b] FIG. 2 is a schematic diagram of transmitting a TB PPDU using an adaptive RU; [Figure 4] 2 is a schematic diagram of power-related subfields in an 802.11be trigger frame. [Figure 5a] FIG. 2 is a schematic diagram of an OBSS formed by partially overlapping one BSS with another BSS. [Figure 5b] 1 is a schematic diagram of an OBSS formed by one BSS that includes another BSS. [Figure 6a] 1 is a schematic flowchart of a spatial reuse method based on parameterized spatial reuse in 802.11ax; [Figure 6b] 1 is a schematic flow chart of a spatial reuse method based on parameterized spatial reuse in 802.11be. [Figure 7] 1 is a schematic diagram of a UL PSR field in an 802.11be trigger frame. [Figure 8] FIG. 2 is a schematic diagram of simultaneously scheduling HE TB PPDU and EHT TB PPDU transmissions; [Figure 9] 1 is a schematic flowchart of a method for determining a transmission power in a wireless local area network according to an embodiment of the present application. [Figure 10] 4 is another schematic flowchart of a method for determining transmit power in a wireless local area network according to an embodiment of the present application. [Figure 11A] 2 is a schematic flowchart of a method for determining transmit power based on spatial reuse, according to an embodiment of the present application; [Figure 11B] 2 is a schematic flowchart of a method for determining transmit power based on spatial reuse, according to an embodiment of the present application; [Figure 12] FIG. 2 is a schematic diagram of a first resource unit, a second resource unit and a third resource unit according to an embodiment of the present application; [Figure 13] 2 is a schematic flowchart of a method for determining a spatial reuse parameter field in a PPDU according to an embodiment of the present application; [Figure 14] FIG. 2 is a schematic diagram of a third resource unit and a frequency indication range of an EHT PSR field according to an embodiment of the present application; [Figure 15] 1 is a schematic diagram of the structure of a communication device 1 according to an embodiment of the present application. [Figure 16] 1 is a schematic diagram of the structure of a communication device 2 according to an embodiment of the present application. [Figure 17] 1 is a schematic diagram of the structure of a communication device 1000 according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0080] The following clearly and completely describes the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application.

[0081] In the description of this application, unless otherwise specified, " / " means "or". For example, A / B can represent A or B. The term "and / or" in this specification describes only the association relationship between related objects and indicates that there can be three relationships. For example, A and / or B can represent the following three cases: only A is present, both A and B are present, and only B is present. In addition, "at least one" means one or more, and "multiple" means two or more. At least one of the following (elements) or similar expressions means any combination of these, including any combination of singular (elements) or multiple (elements). For example, at least one of a, b, or c can represent a or b or c, a and b, a and c, b and c, or a, b, and c. Each of a, b, and c can be singular or plural.

[0082] In the description of this application, terms such as "first" and "second" do not limit the number and order of execution, and terms such as "first" and "second" do not limit the difference.

[0083] In this application, terms such as "example" or "for example" are used to denote providing an example, illustration, or explanation. Any embodiment or design scheme described in this application as an "example" or "for example" should not be construed as being more preferred or having more advantages over other embodiments or design schemes. Rather, terms such as "example," "in an example," or "for example" are intended to present the relevant concept in a concrete manner.

[0084] It should be understood that in this application, "when" and "if" refer to the device performing the corresponding processing in a target situation and are not intended to be time-limited. These terms do not imply that the device is required to take a decision action at implementation time, nor do they imply any other limitations.

[0085] In this application, the terms "a," "an," and "the" are intended to denote "one or more," and not "one and only one," unless otherwise specified.

[0086] In the embodiments of the present application, it should be understood that "B corresponding to A" indicates that B is related to 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 only on A. Alternatively, B may be determined based on A and / or other information.

[0087] In order to facilitate understanding of the method provided in the embodiment of the present application, the following describes the system architecture of the method provided in the embodiment of the present application. It can be understood that the system architecture described in the embodiment of the present application is intended to more clearly describe the technical solutions in the embodiment of the present application, and does not constitute any limitation on the technical solutions provided in the embodiment of the present application.

[0088] An embodiment of the present application provides a method for determining a transmission power in a wireless local area network. The transmission power of the STA is calculated using an indication of the AP transmission power subfield, an indication of the uplink target received power subfield, and a ratio of a size of a first resource unit (allocated to the STA by the AP) to a size of a second resource unit (actually used by the STA for transmission), where the second resource unit is a part of the first resource unit. The TB PPDU is transmitted at the calculated transmission power. This solves the transmission power problem of the station in a scenario where the station transmits using a part of the MRU / RUs allocated to it, and can control the power at which the TB PPDU is received by the AP within the controllable range of the AP. The method for determining a transmission power in a wireless local area network may be applied to a wireless communication system, for example, a wireless local area network system. The method for determining a transmission power in a wireless local area network may be implemented by a communication device in the wireless communication system, or a chip or processor in the communication device. The communication device may be an access point device or a station device. Alternatively, the communication device may be a wireless communication device supporting parallel transmission in multiple links. For example, a communication device may be referred to as a multi-link device (MLD) or a multi-band device. Compared with a communication device that supports only single-link transmission, a multi-link device has higher transmission efficiency and a larger throughput rate.

[0089] The technical solutions provided in the present application may be applied to various communication systems, such as systems using the 802.11 standard. For example, the 802.11 standard includes, but is not limited to, the 802.11be standard or the next generation 802.11 standard. Scenarios in which the technical solutions of the present application are applicable include communication between an AP and one or more STAs, or communication between APs, or communication between STAs. In the embodiments of the present application, the term "communication" may also be described as "data transmission", "information transmission", or "transmission".

[0090] FIG. 1 is a schematic diagram of an architecture of a wireless communication system according to an embodiment of the present application. As shown in FIG. 1, the wireless communication system may include one or more APs (e.g., AP101 and AP102 in FIG. 1) and one or more STAs (e.g., STA201, STA202, and STA203 in FIG. 1). Both APs and STAs support WLAN communication protocols. The communication protocols may include 802.11be (or Wi-Fi 7, called EHT protocol), and may further include protocols such as 802.11ax and 802.11ac. Of course, the communication protocols may further include next-generation protocols such as 802.11be with the continuous evolution and development of communication technology. WLAN is used as an example. An apparatus for implementing the method in the present application may be an AP or STA in a WLAN, or a chip or processing system disposed in an AP or STA.

[0091] An access point in the present application (e.g., AP101 or AP102 in FIG. 1) is a device having a wireless communication function, supports communication using a WLAN protocol, and has the function of communicating with other devices (e.g., stations or other access points) in a WLAN. It is clear that an access point may further have the function of communicating with other devices. In a WLAN system, an access point may be called an access point station (AP STA). A device having a wireless communication function may be an entire device, or a chip or processing system mounted on the entire device. A device equipped with a chip or processing system may implement the methods and functions in the embodiments of the present application under the control of the chip or processing system. An AP in the embodiments of the present application is a device that provides services to STAs and may support 802.11 series protocols. For example, an AP may be a communication entity, such as a communication server, a router, a switch, or a bridge. An AP may include various forms of macro base stations, micro base stations, relay stations, etc. Of course, an AP may alternatively be various forms of chips or processing systems in these devices to implement the methods and functions in the embodiments of the present application.

[0092] Optionally, a station in this application (e.g., STA201, STA202, or STA203 in FIG. 1) is a device having wireless communication capability, supports communication according to a WLAN protocol, and has the ability to communicate with other stations or access points in a WLAN network. In a WLAN system, a station may be called a non-access point station (non-AP STA). For example, a STA is any user communication device that allows a user to communicate with an AP and further communicate with a WLAN. A device having wireless communication capability may be an entire device, or a chip or processing system mounted on the entire device. A device equipped with a chip or processing system may implement the methods and functions in the embodiments of this application under the control of the chip or processing system. For example, a STA may be a user equipment that can connect to the Internet, such as a tablet computer, a desktop computer, a laptop computer, a notebook computer, an ultra-mobile personal computer (UMPC), a handheld computer, a netbook, a personal digital assistant (PDA), or a mobile phone. Alternatively, the STA may be an Internet of Things node in the Internet of Things, an in-vehicle communication device in the Internet of Vehicles, an entertainment device, a gaming device or system, a Global Positioning System device, etc. Alternatively, the STA may be a chip and processing system within the aforementioned terminal.

[0093] WLAN systems can provide high-speed and low-latency transmission. With the continuous development of WLAN application scenarios, WLAN systems can be applied to more scenarios or industries, such as the Internet of Things industry, the Internet of Vehicles industry, banking, corporate offices, stadium exhibition halls, concert halls, hotel rooms, apartment buildings, hospital wards, classrooms, supermarkets, squares, streets, production plants, and warehouses. Of course, devices (such as access points or stations) supporting WLAN communication may be sensor nodes (e.g., smart water meters, smart electricity meters, or smart air detection nodes) in smart cities, smart devices (e.g., smart cameras, projectors, displays, televisions, stereos, refrigerators, or washing machines) in smart homes, nodes in the Internet of Things, entertainment terminals (e.g., wearable devices such as augmented reality (AR) devices and virtual reality (VR) devices), smart devices (e.g., printers, projectors, speakers, or stereos) in smart offices, Internet of Vehicles devices in the Internet of Vehicles, infrastructure in daily life scenarios (e.g., vending machines, supermarket self-service navigation stations, self-service cash register devices, or self-service ordering machines), and devices in large sports and music venues, etc. The specific forms of STAs and APs are not limited in the embodiments of this application and are merely examples for the purposes of explanation herein.

[0094] It should be understood that the 802.11 standard focuses on the physical layer (PHY) part and the medium access control (MAC) layer part. Please refer to FIG. 2a for an example. FIG. 2a is a schematic diagram of the structure of an access point according to one embodiment of the present application. The AP may be multi-antenna / multi-radio frequency or single antenna / single radio frequency. The antenna / radio frequency is used to transmit / receive data packets (data packets in this specification may also be referred to as physical layer protocol data units, i.e., PPDUs). In one embodiment, the antenna or radio frequency part of the AP may be separated from the main body of the AP, i.e., may be located remotely. In FIG. 2a, the AP may include a physical layer processing circuit and a medium access control layer processing circuit. The physical layer processing circuit may be configured to process physical layer signals, and the MAC layer processing circuit may be configured to process MAC layer signals. In another example. FIG. 2b is a schematic diagram of the structure of a station according to one embodiment of the present application. FIG. 2b is a schematic diagram of the structure of a single antenna / radio frequency STA. In a practical scenario, the STA may alternatively be a multi-antenna / multi-radio frequency device with more than two antennas. The antennas / radio frequencies are used to transmit / receive data packets. In one embodiment, the antenna or radio frequency part of the STA may be separated from the main body of the STA, i.e., may be located remotely. In FIG. 2b, the STA may include a PHY processing circuit and a MAC processing circuit. The physical layer processing circuit may be configured to process physical layer signals, and the MAC layer processing circuit may be configured to process MAC layer signals.

[0095] The above briefly describes the system architecture in the embodiments of the present application. In order to better understand the technical solutions in the embodiments of the present application, the following will describe the relevant contents of the embodiments of the present application.

[0096] 1.Adaptive RU for TB PPDU transmission procedure and Carrier Sensing (CS) In the trigger frame-based uplink scheduling transmission method, the trigger frame transmitted by the AP includes a carrier sense required field, which indicates that the station needs to perform carrier sensing. Thus, when performing TB PPDU transmission, the STA performs carrier sensing on one or more 20MHz subchannels in which the MRU / RU assigned to the STA is located, and detects whether the sensed energy exceeds a certain predetermined threshold. If the energy sensed by the STA on a particular 20MHz subchannel exceeds the predetermined threshold, it indicates that the 20MHz subchannel is busy. If the energy sensed by the STA on a particular 20MHz subchannel does not exceed the predetermined threshold, it indicates that the 20MHz subchannel is idle. According to the 802.11ax standard, if at least one 20MHz subchannel in the frequency range in which the RU assigned to the STA is located is busy, the HE TB PPDU cannot be transmitted. This prevents interference to other transmissions. Figure 3a is a schematic diagram of the transmission of the HE TB PPDU with carrier sensing. The RU assigned to STA1 is a 484-tone RU, and the frequency range corresponding to the 484-tone RU is 40 MHz, which includes two 20 MHz subchannels. STA1 performs carrier sensing before transmission. If STA1 finds that one of the 20 MHz subchannels is busy and the other 20 MHz subchannel is idle, STA1 cannot transmit on the assigned 484-tone RU. The RU assigned to STA4 is a 242-tone RU, and the frequency range corresponding to the 242-tone RU is 20 MHz, which includes one 20 MHz subchannel. STA4 performs carrier sensing before transmission. If STA4 finds that the 20 MHz subchannel is idle, STA4 may transmit a HE TB PPDU on the assigned 242-tone RU. It should be understood that a 484-tone RU refers to one resource unit including 484 tones. Similarly, a 242-tone RU refers to one resource unit including 242 tones.In the following, Z-tone-RU has the same meaning, in other words, one resource unit including Z tones (Z is a positive integer), and the details are not described below.

[0097] In the trigger frame-based uplink scheduling transmission method in 802.11be, the concept of adaptive RU is proposed. Specifically, the triggered station may adaptively select some RUs (these RUs are adaptive RUs) from the RU or multiple RUs (MRUs) assigned to the station by the trigger frame based on the channel busy / idle state detected by sensing to transmit the TB PPDU. This avoids the channel detected as busy. Figure 3b is a schematic diagram of transmitting the TB PPDU using adaptive RU. The RU assigned to STA1 is a 484-tone RU, and the frequency range corresponding to the 484-tone RU is 40 MHz including two 20 MHz subchannels. STA1 performs carrier sensing before transmission. If STA1 finds that one of the 20 MHz subchannels is busy and the other 20 MHz subchannel is idle, STA1 may transmit the TB PPDU in the idle 20 MHz subchannel (or 242-tone RU). The idle 242-tone RU may be called the adaptive RU. The RU assigned to STA4 is a 242-tone RU, and the frequency range corresponding to the 242-tone RU is 20 MHz, including one 20 MHz subchannel. STA4 performs carrier sensing before transmission. If STA4 finds that the 20 MHz subchannel is idle, STA4 may transmit a TB PPDU on the assigned 242-tone RU.

[0098] When the MRU / RU assigned to the STA has a busy subchannel (herein, "busy subchannel" means that the subchannel is in a busy state), the STA may still transmit if the following two conditions are met: (1) the assigned MRU / RU includes at least one idle subchannel (herein, "idle subchannel" means that the subchannel is in an idle state); and (2) there is an available resource unit that meets the specifications among the resource units corresponding to the at least one idle subchannel (not all resource unit styles can be transmitted). Here, the available resource unit that meets the specifications (i.e., an adaptive RU) may be an MRU / RU format currently supported by 802.11be. For details, please refer to the current description of the 802.11be standard. This application is not related to a specific adaptive RU format, so details will not be described here.

[0099] For ease of explanation, it should be understood that in this application, an adaptive RU refers to a resource unit with a varying size (wherein it means that the resource unit actually used by a station for transmission differs in size from the MRU / RU assigned to the station). This term also encompasses adaptive MRU. No distinction is made hereinafter.

[0100] Adaptive RU has been proposed for 802.11be MRU / RU, specifically, stations transmit on some allocated idle subchannels, which allows spectrum resources to be used more efficiently.

[0101] 2. Method for calculating station transmission power Figure 4 is a schematic diagram of power-related subfields in an 802.11be trigger frame. As shown in Figure 4, an 802.11be trigger frame includes, but is not limited to, a common information field and an (EHT variant) user information field. The common information field includes, but is not limited to, an AP Tx power subfield, and the (EHT variant) user information field includes, but is not limited to, an uplink target receive power subfield. A station may use the AP Tx power subfield and the uplink target receive power subfield to roughly determine the uplink (UL) transmit power of the station. The scheme is as follows:

number

[0102] The meanings of the parameters in equation (1-1) will be explained below.

[0103]

number

[0104] TargetRx pwr : The received power expected by the AP, measured in dBm and indicated by the UL Target Receive Power subfield in the (EHT variant) User Information field of the trigger frame.

[0105] PL DL : Path loss from the AP to the STA, measured in decibels (dB).

[0106] The STA calculates the path loss PL from the AP to the STA using the following equation (1-2). DL (dB) can be calculated.

number

[0107] The meanings of the parameters in equation (1-2) will be explained below.

[0108]

number

[0109] Rx pwr : The received signal power at the STA, measured in dBm / 20MHz.

[0110] Note 1:

number

number

[0111] NOTE 2: A STA using uplink beamforming must take the beamforming gain into account when calculating its transmit power. If beamforming is used for the PPDU in which the trigger frame is placed, the AP must:

number

[0112] NOTE 3: The transmit power of the EHT TB PPDU transmitted by a station must still satisfy the minimum and maximum transmit power limits of the station. These limits are influenced by hardware capabilities, supervisory requirements, local maximum transmit power levels, and non-802.11 device coexistence requirements, etc.

[0113] It can be seen that 802.11be proposes a method for calculating the transmission power of a station. However, this method is applicable when the station transmits in all allocated resource units, but not when the station transmits in an adaptive RU. The size of the adaptive RU is equal to or smaller than the size of the allocated MRU / RU. Therefore, if the transmission power of the STA is calculated using the above calculation method, the transmission power of the STA on each subcarrier will be increased, which may cause interference to other WLAN devices. Correspondingly, the power of the subcarrier actually received by the AP will be increased and will be inconsistent / inconsistent with the received power expected by the AP, i.e., the power of the subcarrier actually received by the AP will exceed the controllable range of the AP. Therefore, in a scenario where the station transmits a TB PPDU using an adaptive RU, how to determine the transmission power of the station has not been resolved.

[0114] 3. Overlapping Basic Service Set (OBSS) Overlapping basic service set (OBSS): A basic service set (BSS) operating on the same channel as the station's (STA's) BSS and within (either partly or wholly) its basic service area (BSA). A basic service area is an area that contains members of a basic service set and may contain members of other BSSs.

[0115] In other words, the overlapping part of the basic service area of ​​a BSS and the basic service area of ​​another BSS is the OBSS. It can be understood that overlap here can mean that the basic service area of ​​a BSS partially overlaps or includes the basic service area of ​​another BSS, specifically, the basic service area of ​​a BSS is within the basic service area of ​​another BSS. Figure 5a is a schematic diagram of an OBSS formed by partially overlapping a BSS with another BSS. In Figure 5a, AP1, STA1, and STA3 belong to BSS1, and AP2 and STA2 belong to BSS2. There is an overlapping area between BSS1 and BSS2, and AP1 and AP2 are located in the overlapping area between BSS1 and BSS2. In other words, AP1 and AP2 are located in the OBSS formed by BSS1 and BSS2. Figure 5b is a schematic diagram of an OBSS formed by a BSS including another BSS. In Figure 5b, AP1, STA1, and STA3 belong to BSS1, and AP2 and STA2 belong to BSS2. BSS1 includes BSS2, and AP1 and AP2 are located in the overlapping area of ​​BSS1 and BSS2 (i.e., the basic service area of ​​BSS2 in FIG. 5b). In other words, AP1 and AP2 are located in the OBSS formed by BSS1 and BSS2.

[0116] Optionally, WLAN devices located in the same OBSS may receive information from two BSSs. Figure 5a is used as an example. When AP1 and STA1 located in the same BSS perform data transmission, AP2 located in the other BSS may receive information transmitted by AP1 and STA1, or AP2 may further receive information transmitted by STA3. In this case, AP2 may adaptively adjust the power with which AP2 transmits PPDU to STA2 based on the spatial reuse parameter forwarded by AP1 to perform simultaneous transmission in the OBSS. Similarly, when AP2 and STA2 in the same BSS perform data transmission, AP1 in the other BSS may receive information transmitted by AP2. Alternatively, AP1 may adaptively adjust the power with which AP1 transmits PPDU to STA1 and / or STA3 based on the spatial reuse parameter forwarded by AP2 to perform simultaneous transmission in the OBSS.

[0117] 4. Method for Calculating the Transmission Power of a Parameterized Spatial Reuse Transmission (PSRT) PPDU As the deployment density of WLAN devices increases, it becomes more common for one basic service set to overlap with another BSS, i.e., overlapping basic service sets (OBSS) become more common. In an OBSS scenario, WLAN devices cannot transmit simultaneously due to interference. To solve this problem, 802.11ax proposes a spatial reuse method based on Parameterized Spatial Reuse (PSR).

[0118] FIG. 6a is a schematic flow chart of a spatial reuse method based on parameterized spatial reuse in 802.11ax. It is assumed that AP1 and AP2 are located in the same OBSS, AP1 and STA1 belong to BSS1, and AP2 and STA2 belong to BSS2. As shown in FIG. 6a, AP1 first transmits one Parameterized Spatial Reuse Reception (PSRR) PPDU including a trigger frame to STA1. The common information field of the trigger frame includes an Uplink Spatial Reuse (UL Spatial Reuse) field. The Uplink Spatial Reuse field may include four Uplink Parameterized Spatial Reuse (UL PSR) fields having a length of 4 bits, or may be called an Uplink Spatial Reuse Parameter (UL SRP) field, which indicates the sum of the AP's transmission power and the AP's maximum tolerable interference power. The four UL PSR fields included in the uplink spatial reuse field are a UL PSR1 field, a UL PSR2 field, a UL PSR3 field, and a UL PSR4 field. It should be understood that in this application, UL PSR, UL SRP, and spatial reuse may be used interchangeably, in other words, SRP, PSR, and spatial reuse may be used interchangeably.

[0119] In different bandwidths, the values ​​of the UL PSR1 field to the UL PSR4 field are set as follows: when the bandwidth is 20 MHz, UL PSR1 = UL PSR2 = UL PSR3 = UL PSR4, indicating the value of the UL PSR field of the 20 MHz bandwidth; when the bandwidth is 40 MHz, UL PSR1 = UL PSR3, indicating the value of the UL PSR field of the first 20 MHz subchannel (i.e., the 20 MHz low subchannel) in ascending order of frequency across the 40 MHz bandwidth; UL PSR2 = UL PSR4, indicating the value of the UL PSR field of the second 20 MHz subchannel (i.e., the 20 MHz high subchannel) in ascending order of frequency across the 40 MHz bandwidth; in order to avoid confusion caused by channel assignment, when the bandwidth frequency is 2.4 GHz, UL PSR1 = UL PSR2; when the bandwidth is 80 MHz, the four UL PSR fields respectively indicate the values ​​of the UL PSR fields of the four 20 MHz subchannels. When the bandwidth is 160 MHz, the four UL PSR fields respectively indicate the values ​​of the UL PSR fields of the four 40 MHz subchannels, and the values ​​of the UL PSR fields of the two 20 MHz subchannels within a 40 MHz subchannel are the same.

[0120] The bandwidth (BW) may be indicated using an uplink bandwidth (UL BW) field in the common information field of the trigger frame. The value of the UL PSR field is determined by AP1 and is equal to the sum of the transmission power of AP1 and the maximum allowable interference power of AP1.

[0121] Then, STA1 copies the uplink spatial reuse field in the received trigger frame to the high efficiency signal field A (HE-SIG-A field) of the HE TB PPDU to be transmitted, and then transmits the HE TB PPDU. The HE-SIG-A field includes four PSR fields, namely, PSR1 field, PSR2 field, PSR3 field, and PSR4 field, which correspond one-to-one with the four UL PSR fields in the trigger frame. For example, the value of the PSR1 field in the HE-SIG-A field is copied from the value of the UL PSR1 field in the trigger frame, the value of the PSR2 field in the HE-SIG-A field is copied from the value of the UL PSR2 field in the trigger frame, the value of the PSR3 field in the HE-SIG-A field is copied from the value of the UL PSR3 field in the trigger frame, and the value of the PSR4 field in the HE-SIG-A field is copied from the value of the UL PSR4 field in the trigger frame.

[0122] Since AP1 and AP2 are located in the OBSS formed by BSS1 and BSS2, when AP1 transmits a trigger frame, AP2 may also receive the trigger frame, and when STA1 transmits an HE TB PPDU, AP may also receive the HE TB PPDU. Therefore, after AP receives the PSRR PPDU including the trigger frame, and optionally, after AP2 further receives the HE TB PPDU (after determining that STA1 actually transmits the HE TB PPDU, but this may be ignored in practical implementation), AP2 calculates the transmission power of a Parameterized Spatial Reuse Transmission (PSRT) PPDU based on the received power (i.e., received power level, RPL) of the PSRR PPDU, the values ​​indicated by the four UL PSR fields, and / or the values ​​indicated by the four PSR fields in the HE TB PPDU, respectively. After detecting that the HE TB PPDU has been transmitted, AP2 transmits a PSRT PPDU based on the calculated power. In response, STA2 receives the PSRT PPDU and returns a response frame, for example a block acknowledge frame, to AP2 in response to the PSRT PPDU.

[0123] Optionally, the transmission power of the PSRT PPDU satisfies the following Equations (1 to 3): Transmission power of PSRT PPDU (sent by AP2) ≦ PSR-RPL (1-3)

[0124] The PSR in Equation (1-3) is the value indicated by the UL PSR field or the PSR field. In Equation (1-3), the RPL is the combined transmit power at all receive antenna connectors, over the PSRR PPDU bandwidth, during the non-HE or non-EHT portion of the trigger PPDU (PPDU containing the trigger frame), averaged over all antennas used to receive the PPDU. Here, the transmit power, PSR, and RPL of the PSRT PPDU in Equation (1-3) may be normalized to 20 MHz for calculation, or may be calculated based on the total bandwidth (i.e., the PSRR PPDU bandwidth). This is not limited in this application.

[0125] Optionally, the aforesaid RPL may be understood as the power at which AP2 receives the PPDU transmitted by AP1, and the aforesaid PSR value is determined by AP1 and is equal to the sum of the transmission power of AP1 and the maximum allowable interference power of AP1. Therefore, the aforesaid formula (1-3) may be equivalent to the following formula (1-4): AP2 transmit power ≦ AP1 transmit power + AP1 maximum allowable interference power - power at which AP2 receives PPDU transmitted by AP1 (1-4)

[0126] In formula (1-4), (the transmission power of AP1-the power at which AP2 receives the PPDU transmitted by AP1) is equal to the path loss between AP1 and AP2. Therefore, the above formula (1-4) can be equivalent to the following formula (1-5) or the following formula (1-6). AP2's transmit power ≦ AP1's maximum tolerable interference power + path loss between AP1 and AP2 (1-5) AP2 transmission power - path loss between AP1 and AP2 ≦ maximum allowable interference power of AP1 (1-6)

[0127] (Transmission power of AP2--path loss between AP1 and AP2) indicates the interference of AP2 to AP1. Therefore, any one of the above equations (1-3) to (1-6) can be equivalent to the following equation (1-7): AP2 interference to AP1 ≦ AP1's maximum allowable interference power (1-7)

[0128] Of course, 802.11be also proposes a spatial reuse method based on parameterized spatial reuse. The procedure of the spatial reuse method is similar to that of 802.11ax, and the details are not described again here. Figure 6b is a schematic flowchart of the spatial reuse method based on parameterized spatial reuse in 802.11be. As shown in Figure 6b, the difference between the spatial reuse method based on parameterized spatial reuse in 802.11be and the spatial reuse method based on parameterized spatial reuse in 802.11ax is as follows: (1) The PSRR PPDU carrying the trigger frame may schedule the HE TB PPDU and / or the EHT TB PPDU. (2) AP2 may perform spatial reuse based on the HE TB PPDU and / or the EHT TB PPDU.

[0129] Optionally, Figure 7 is a schematic diagram of a UL PSR field in an 802.11be trigger frame. As shown in Figure 7, the common information field of the 802.11be trigger frame includes four UL PSR fields used for the HE TB PPDU. The user information list of the 802.11be trigger frame includes one special user information field, and the value of the association identifier 12 subfield of the special user information field is one predefined value (e.g., 2007) indicating that the special user information field is used as an extension of the common information field. The special user information field includes two UL PSR fields used for the EHT TB PPDU, namely, an EHT UL PSR1 field and an EHT UL PSR2 field.

[0130] In different bandwidths, the values ​​of the EHT UL PSR1 field and the EHT UL PSR2 field are set as follows: when the bandwidth is 20 MHz, EHT UL PSR1 = EHT UL PSR2, which indicates the value of the EHT UL PSR field of the 20 MHz bandwidth; when the bandwidth is 40 MHz, EHT UL PSR1 indicates the value of the EHT UL PSR field of the first 20 MHz subchannel (i.e., the 20 MHz low subchannel) in ascending order of frequency across the 40 MHz bandwidth; and EHT UL PSR2 indicates the value of the EHT UL PSR field of the second 20 MHz subchannel (i.e., the 20 MHz high subchannel) in ascending order of frequency across the 40 MHz bandwidth. In order to avoid confusion caused by channel assignment, when the bandwidth frequency is 2.4 GHz, EHT UL PSR1 = EHT UL PSR2. When the bandwidth is 80 MHz, the two EHT UL PSR fields indicate the values ​​of the EHT UL PSR fields of two 40 MHz subchannels, respectively, and the values ​​of the EHT UL PSR fields of two 20 MHz subchannels in a 40 MHz subchannel are the same. When the bandwidth is 160 MHz, the two EHT UL PSR fields indicate the values ​​of the EHT UL PSR fields of four 40 MHz subchannels, respectively, and the values ​​of the EHT UL PSR fields of two 20 MHz subchannels in a 40 MHz subchannel are the same. When the bandwidth is 160 MHz, the two EHT UL PSR fields indicate the values ​​of the EHT UL PSR fields of two 80 MHz subchannels, respectively, in ascending order of frequency, and the values ​​of the EHT UL PSR fields of four 20 MHz subchannels in an 80 MHz subchannel are the same. When the bandwidth is 320 MHz, the two EHT UL PSR fields respectively indicate the values ​​of the EHT UL PSR fields of two 160 MHz subchannels, and the values ​​of the EHT UL PSR fields of the eight 20 MHz subchannels in the 160 MHz subchannel are the same.

[0131] Optionally, the U-SIG of the EHT TB PPDU includes two EHT PSR fields that correspond one-to-one to the two EHT UL PSR fields in the trigger frame, e.g., the value of the EHT PSR1 field in the U-SIG is copied from the value of the EHT UL PSR1 field in the trigger frame, and the value of the EHT PSR2 field in the U-SIG is copied from the value of the EHT UL PSR2 field in the trigger frame.

[0132] Optionally, FIG. 8 is a schematic diagram of simultaneously scheduling HE TB PPDU and EHT TB PPDU transmission. As shown in FIG. 8, an AP transmits a trigger frame. The trigger frame is used to simultaneously schedule a station supporting an HE protocol (e.g., STA1 in FIG. 8) and a station supporting an EHT protocol (e.g., STA2 in FIG. 8) to perform uplink data transmission. After STA1 and STA2 receive the trigger frame, STA1 copies the values ​​of four UL PSR fields in the trigger frame into four PSR fields in the HE TB PPDU one by one, and then transmits the HE TB PPDU, and STA2 copies the values ​​of two EHT UL PSR fields in the trigger frame into two EHT PSR fields in the EHT TB PPDU one by one, and then transmits the EHT TB PPDU. After receiving an uplink multi-user PPDU, the AP returns a Multiple STA Block Acknowledgment (M-BA) frame at a certain time interval (e.g., a short interframe space) to acknowledge that the AP has received the PPDU transmitted by one or more stations.

[0133] The correspondence between the values ​​and meanings of the UL PSR field / PSR field / EHT UL PSR field / EHT PSR field in this application may be shown in Table 1 below. It should be understood that the units of PSR shown in Table 1 are only examples. In practical applications, PSR may not have a unit, or the unit of PSR is dBm, or the unit of PSR is dBm.2 or the unit of PSR is dB. This is not limited in this application. In other possibilities, the PSR is normalized to 20 MHz, and the unit of PSR is dBm / 20 MHz, dBm 2 / 20MHz, or dB / 20MHz, etc.

[0134] [Table 1]

[0135] In conclusion, in the OBSS scenario, if a STA uses an adaptive RU to transmit an EHT TB PPDU and the size of the adaptive RU is smaller than the size of the MRU / RU allocated to the STA, the PSRT PPDU It can be seen that the transmit power at which to transmit needs to be determined.

[0136] The present application provides a method for determining a transmission power in a wireless local area network so that the power at which the AP receives a TB PPDU is within the controllable range of the AP, in order to solve the transmission power problem of a station in a scenario in which the station transmits using an adaptive RU. The present application further provides a method for determining a transmission power based on spatial reuse, in order to solve the transmission power problem of a PSRT PPDU transmitted by an access point when a station transmits using an adaptive RU in an OBSS and spatial reuse scenario, in order to increase the transmission power of the access point so that the access point obtains a larger gain. The present application further provides a method for determining a spatial reuse parameter field in a PPDU, in order to solve the problem of how to design an EHT PSR field to solve the transmission power problem of a PSRT PPDU when a station transmits using an adaptive RU in an OBSS and spatial reuse scenario, in order to increase the transmission power of the access point so that the access point obtains a larger gain.

[0137] The following will describe in detail the technical solutions provided in the present application with reference to more accompanying drawings.

[0138] The technical solution provided in the present application is described using multiple embodiments, including embodiment 1, embodiment 2, embodiment 3, and embodiment 4. Embodiment 1 describes changing the transmission power calculation method of the station when the station uses an adaptive RU to transmit the TB PPDU, in order to solve the transmission power problem of the station. Embodiment 2 mainly describes changing the meaning of the corresponding subfield in the trigger frame, in order to reduce the impact on the transmission power of the station when the station uses an adaptive RU to transmit the TB PPDU. Embodiment 3 describes changing the spatial reuse read rule by the second access point by acquiring the adaptive RU used by the station to transmit the TB PPDU in the OBSS scenario, in order to solve the transmission power problem of the PSRT PPDU. Embodiment 4 describes directly changing the value of the EHT PSR field in the TB PPDU with reference to the relevant instruction of the adaptive RU, in order to indirectly solve the transmission power problem of the PSRT PPDU in the OBSS scenario. It should be understood that the technical solutions described in embodiment 1 to embodiment 4 of the present application can be combined to form a new embodiment, and parts having the same or similar concept or solution can be mutually referenced or combined. The following describes the embodiments individually in detail.

[0139] Optionally, the station in this application may be any STA shown in FIG. 1, for example, STA201. The first access point in this application may be any AP shown in FIG. 1, for example, AP101. The second access point in this application may be AP102 shown in FIG. 1. The station, the first access point, and the second access point in this application all support the 802.11be protocol, and may further support other WLAN communication protocols, such as 802.11ax and 802.11ac. It should be understood that the station, the first access point, and the second access point in this application may further support the next generation protocol of 802.11be. In other words, the method provided in this application is applicable to the 802.11be protocol and the next generation protocol of 802.11be.

[0140] EMBODIMENT 1 Embodiment 1 of the present application mainly describes the transmission power design of a station when the station uses an adaptive RU to transmit a TB PPDU.

[0141] 9 is a schematic flowchart of a method for determining a transmission power in a wireless local area network according to an embodiment of the present application. As shown in FIG. 9, the method for determining a transmission power in a wireless local area network includes, but is not limited to, the following steps:

[0142] S101: A first access point transmits a trigger frame, where the trigger frame indicates a first resource unit allocated to a station, and the trigger frame includes an AP transmit power subfield and an uplink target received power subfield.

[0143] S102: A station receives a trigger frame.

[0144] S103: The station transmits a trigger-based physical layer protocol data unit TB PPDU at a first transmission power, and a second resource unit occupied by the TB PPDU is all or a part of the resource units among the first resource units, and the first transmission power is determined based on an indication of the AP transmission power subfield, an indication of the uplink target received power subfield, the second resource unit, and the first resource unit.

[0145] S104: The first access point receives the TB PPDU, and the power at which the first access point receives the TB PPDU is determined based on the first transmission power and a path loss from the first access point to the station.

[0146] Optionally, the trigger frame is an 802.11be trigger frame, including but not limited to a common information field and a user information list field. As shown in FIG. 4, the common information field includes but is not limited to an AP transmit power subfield indicating the transmit power of the AP. The common information field includes common information read by all STAs (STAs here include at least one of HE STAs and EHT STAs). An EHT STA in this specification is a station that supports an EHT protocol and is compatible with HE and previous protocols. In some scenarios and embodiments, an HE STA in this application supports up to the HE protocol but does not support future Wi-Fi protocols, such as EHT protocols. However, this application should not be understood as being limited such that all HE STAs cannot support future Wi-Fi protocols. The user information list field includes but is not limited to one special user information field (the value of the association identifier 12 subfield is equal to 2007) and one or more EHT variant user information fields. The special user information field includes common information that is read by all EHT STAs. As shown in FIG. 4, one EHT variant user information field includes information that is read by one EHT STA. One EHT variant user information field includes, but is not limited to, an association identification 12 (AID12) subfield, an RU allocation subfield, and an uplink target received power subfield. The uplink target received power subfield indicates the received power expected by the AP. The AID12 subfield indicates the association identifier of the STA. The RU allocation subfield indicates the specific location of the resource unit allocated to the STA (i.e., the STA indicated by the AID12 subfield). In other words, the RU allocation subfield in the trigger frame indicates the first resource unit allocated to the station.It should be understood that the first resource unit in this specification may be in the MRU / RU format supported by the 802.11be protocol or the next generation protocol of 802.11be. For details, please refer to the relevant description of the relevant protocol. Details will not be described here.

[0147] Optionally, the first access point transmits a trigger frame, which is used to trigger the station to transmit the TB PPDU, and the trigger frame further indicates the first resource unit allocated to the station. After receiving the trigger frame, the station may select a second resource unit from the first resource unit, in which the TB PPDU is actually transmitted, based on a channel busy or idle state detected by sensing in the first resource unit. In other words, the second resource unit is a whole or part of the resource unit among the first resource units. The station may determine the transmission power of the station based on the first resource unit, the second resource unit, the indication of the AP transmission power subfield in the trigger frame, and the indication of the uplink target received power subfield in the trigger frame (for ease of description, in this embodiment of the present application, the transmission power of the station is referred to as the first transmission power). The station transmits the TB PPDU in the second resource unit at the determined first transmission power, for example, transmits the EHT TB PPDU. In response, the first access point receives the TB PPDU and returns an acknowledgement frame to the station. The power at which the first access point receives the TB PPDU is determined based on the first transmission power and the path loss from the first access point to the station. For example, the power at which the first access point receives the TB PPDU is equal to the difference between the first transmission power and the path loss from the first access point to the station. It should be understood that the second resource unit in this specification may be an MRU / RU format supported by the 802.11be protocol or the next generation protocol of 802.11be. For details, please refer to the related description of the related protocol. Details will not be described here.

[0148] The following describes in detail a specific embodiment of the transmission power of the station, i.e., the first transmission power. Some of the following embodiments may be combined to form new embodiments, and parts related to the same or similar concepts or solutions may be mutually referenced or combined.

[0149] Optionally, the first transmission power may be determined based on the value indicated by the AP transmission power subfield, the value indicated by the uplink target received power subfield, the size of the second resource unit, and the size of the first resource unit. In particular, when the second resource unit is a part of the first resource units, i.e., when the size / size of the resource unit (i.e., the second resource unit) selected by the station to actually transmit the TB PPDU does not match the size / size of the resource unit (i.e., the first resource unit) allocated to the station by the first access point, the first transmission power is determined based on the indication of the AP transmission power subfield, the indication of the uplink target received power subfield, and the ratio of the size of the second resource unit to the size of the first resource unit.

[0150] Embodiment 1: The size / size of the first resource unit is determined based on the total number of subcarriers included in the first resource unit, and the size / size of the second resource unit is determined based on the total number of subcarriers included in the second resource unit. The subcarriers in this embodiment of the present application may be one or more of the following, namely, data subcarriers, pilot subcarriers, DC subcarriers, null subcarriers, and guard subcarriers. For example, the size / size of the first resource unit is determined based on the total number of data subcarriers included in the first resource unit, and the size / size of the second resource unit is determined based on the total number of data subcarriers included in the second resource unit. For example, the size / size of the first resource unit is determined based on the sum of the data subcarriers and pilot subcarriers included in the first resource unit, and the size / size of the second resource unit is determined based on the sum of the data subcarriers and pilot subcarriers included in the second resource unit.

[0151] In particular, a calculation scheme (or a determination scheme) of the first transmission power (ie, the transmission power of the station) may be expressed by the following Equations (2-1) and (2-2).

number

number

[0152] In the above formula (2-1) and the above formula (2-2),

number

[0153] It should be understood that the above equation (2-1) is an expression in the logarithmic domain, and the above equation (2-2) is an expression in the linear domain.

[0154] Optionally, with respect to the above formula (2-1):

number

number

[0155] Optionally, with respect to the above formula (2-2),

number

[0156] Optionally, in relation to the above formula (2-1), RU_SIZE new RU_SIZE for allocatedThe ratio of may be rounded. Here, rounding includes one of rounding up, rounding down, and rounding to the nearest integer. Similarly, with respect to the above formula (2-2), RU_SIZE allocated RU_SIZE for new The ratio may be rounded, where rounding includes one of rounding up, rounding down, and rounding to the nearest integer. For example, the rounded-up value of 1.7 is 2, the rounded-down value of 1.7 is 1, and the rounded-to-nearest value of 1.7 is 2.

[0157] Optionally, the above formula (2-1) and the above formula (2-2) may further have several modifications, including multiplying one or more terms on the right side of the formula by a coefficient, or adding one or more terms on the right side of the formula by a coefficient, etc. In one example, a constant C is added to / subtracted from the right side of the formula (2-1) and / or the right side of the formula (2-1).

number

[0158] Optionally, the size / size of the first resource unit may be the total number of subcarriers included in the first resource unit, and the size / size of the second resource unit may be the total number of subcarriers included in the second resource unit. In one example, assuming that the first resource unit is 2×996-tone RU, the total number of subcarriers included in the first resource unit (i.e., RU_SIZE allocated ) is 1992 (in other words, 2 × 996 = 1992). Assuming that the second resource unit is a 996-tone RU, the total number of subcarriers contained in the second resource unit (i.e., RU_SIZE new In another example, assuming that the first resource unit is a 3×996-tone MRU, the total number of subcarriers included in the first resource unit (i.e., RU_SIZE) is 996. allocated ) is 2988 (in other words, 3×996=2988). Assuming that the second resource unit is a 2×996-tone RU, the total number of subcarriers contained in the second resource unit (i.e., RU_SIZE new In another example, assuming the first resource unit is a 4×996-tone MRU, the total number of subcarriers contained in the first resource unit (i.e., RU_SIZE) is 1992 (in other words, 2×996=1992). allocated ) is 3984 (in other words, 4 × 996 = 3984). Assuming that the second resource unit is a 3 × 996-tone MRU, the total number of subcarriers contained in the second resource unit (i.e., RU_SIZE new ) is 2988 (in other words, 3 × 996 = 2988).

[0159] Optionally, the size or size of the first resource unit may be a value obtained after mapping is performed on the total number of subcarriers included in the first resource unit, and the size or size of the second resource unit may be a value obtained after mapping is performed on the total number of subcarriers included in the second resource unit. In one example, the mapping relationship is assumed to be 242 subcarriers are mapped to 1, 484 subcarriers are mapped to 2, 996 subcarriers are mapped to 4, and so on. Assuming that the first resource unit is 2×996-tone RU, the size or size of the first resource unit (i.e., RU_SIZE allocated ) is 8 (2×4=8). Assuming the second resource unit is a 996-tone RU, the size or dimensions of the second resource unit (i.e., RU_SIZE new ) is 4.

[0160] Optionally, the size or size of the first resource unit may alternatively be the bandwidth of the first resource unit, and the size or size of the second resource unit may alternatively be the bandwidth of the second resource unit. Here, the bandwidth of the first resource unit may be a contiguous bandwidth or an actually occupied bandwidth. In one example, it is assumed that the first resource unit is a 996+484-tone RU, and the 996-tone RU included in the 996+484-tone RU is placed in the first 80 MHz, and the 484-tone RU is placed in the second 40 MHz of the second 80 MHz. In this case, the contiguous bandwidth of the 996+484-tone RU is 160 MHz (80 MHz+80 MHz), and the actually occupied bandwidth is 120 MHz (80 MHz+40 MHz). If it is assumed that the second resource unit is a 996-tone RU, both the contiguous bandwidth and the actually occupied bandwidth of the 996-tone RU are 80 MHz.

[0161] It should be understood that if the second resource unit is the entire resource unit in the first resource unit, in other words, if the size / size of the resource unit (i.e., the second resource unit) selected by the station to actually transmit the TB PPDU is the same as the size / size of the resource unit (i.e., the first resource unit) assigned to the station by the first access point, the transmission power (i.e., the first transmission power) of the station can also be calculated using the above formula (2-1) or the above formula (2-2). However, in this case, RU_SIZE allocated RU_SIZE new is equal to.

[0162] Embodiment 2: The size of the first resource unit is determined based on the number of first bandwidth sizes included in the bandwidth of the first resource unit, and the size of the second resource unit is determined based on the number of first bandwidth sizes included in the bandwidth of the second resource unit. The number of first bandwidth sizes included in the bandwidth of the first resource unit can be understood as the number of bandwidths Y occupied by the initially allocated RU / MRU, in other words, the number of bandwidths Y occupied by the RU / MRU allocated to the station by the first access point. The number of first bandwidth sizes included in the bandwidth of the second resource unit can be understood as the number of bandwidths Y occupied by the newly used RU / MRU, that is, the number of bandwidths Y occupied by the RU / MRU actually used by the station to transmit the TB PPDU. Each of the first bandwidth size and Y indicates a bandwidth granularity and can be any one of the following: 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz.

[0163] In particular, a calculation scheme (or a determination scheme) of the first transmission power (ie, the transmission power of the station) may be expressed by the following Equations (2-3) and (2-4).

number

number

[0164] In the above formula (2-3) and the above formula (2-4),

number

[0165] It should be understood that the above equation (2-3) is an expression in the logarithmic domain, and the above equation (2-4) is an expression in the linear domain.

[0166] Optionally, with respect to the above formula (2-3):

number

number

[0167] Optionally, with respect to the above formula (2-4):

number

[0168] Optionally, in terms of formula (2-3) above, RU_BW_Number new RU_BW_Number for allocated The ratio of may be rounded. Here, rounding includes one of rounding up, rounding down, and rounding to the nearest integer. Similarly, with respect to the above formula (2-4), RU_BW_Number allocated RU_BW_Number for new The ratio may be rounded, where rounding includes one of rounding up, rounding down, and rounding to the nearest integer.

[0169] Optionally, the above formula (2-3) and the above formula (2-4) may further have multiple modifications, including multiplying one or more terms on the right side of the formula by a coefficient, or adding one or more terms on the right side of the formula by a coefficient, etc. Please refer to the modifications of embodiment 1, and the details will not be described again here.

[0170] Optionally, the size / size of the first resource unit may be the number of first bandwidth sizes included in the bandwidth of the first resource unit, and the size / size of the second resource unit may be the number of first bandwidth sizes included in the bandwidth of the second resource unit.

[0171] Optionally, the bandwidth of the first resource unit is from the lowest frequency of the first resource unit to the highest frequency of the first resource unit, and the bandwidth of the second resource unit is from the lowest frequency of the second resource unit to the highest frequency of the second resource unit. In other words, the bandwidth of the first resource unit and the second resource unit is counted based on consecutive occupancy. The first resource unit is used as an example. It is assumed that the first resource unit is a 996+484-tone RU, and the 996-tone RU included in the 996+484-tone RU is placed in the first 80MHz, and the 484-tone RU is placed in the second 40MHz of the second 80MHz. In this case, the bandwidth of the 996+484-tone RU is 160MHz (80MHz+80MHz). Assuming that the first bandwidth size is 40 MHz, the number of bandwidths of the first bandwidth size (i.e., 40 MHz) included in the bandwidth of the first resource unit (i.e., 160 MHz) (i.e., RU_BW_Number allocated ) is 4.

[0172] Optionally, the bandwidth of the first resource unit is the sum of the bandwidths occupied by one or more resource units included in the first resource unit, and the bandwidth of the second resource unit is the sum of the bandwidths occupied by one or more resource units included in the second resource unit. In other words, the bandwidths of the first resource unit and the second resource unit are counted based on non-consecutive occupancy. The first resource unit is used as an example. It is assumed that the first resource unit is a 996+484-tone RU, and the 996-tone RU included in the 996+484-tone RU is placed in the first 80MHz, and the 484-tone RU is placed in the second 40MHz of the second 80MHz. In this case, the bandwidth of the 996+484-tone RU is 120MHz (80MHz+40MHz). Assuming that the first bandwidth size is 40 MHz, the number of bandwidths of the first bandwidth size (i.e., 40 MHz) included in the bandwidth of the first resource unit (i.e., 120 MHz) (i.e., RU_BW_Number allocated ) is 3.

[0173] It should be understood that if the second resource units are all of the first resource units, the station's transmit power (i.e., the first transmit power) can also be calculated using the above formula (2-3) or the above formula (2-4). However, in this case, RU_BW_Number allocated is RU_BW_Number new is equal to.

[0174] It should be further understood that although the adaptive RU referred to in this embodiment of the present application is equal to or less than the initially allocated RU / MRU, the power adjustment in the embodiments 1 and 2 is also applicable to the scenario where the adaptive RU is larger than the initially allocated RU / MRU. In other words, the transmission power of the station is calculated using the ratio of the adaptive RU to the initially allocated RU / MRU, which is also applicable to the scenario where the adaptive RU is larger than the initially allocated RU / MRU.

[0175] Embodiment 3: The first transmission power (i.e., the transmission power of the station) is equal to or greater than the second transmission power and equal to or less than the third transmission power, in other words, the second transmission power≦the transmission power of the station (i.e., the first transmission power)≦the third transmission power. The second transmission power can be calculated according to any one of the above formulas (2-1) to (2-4), and the details will not be described again here. The third transmission power can be determined according to the indication of the AP transmission power subfield and the indication of the uplink target reception power subfield. For a specific calculation method, please refer to the above formula (1-1). The details will not be described again here.

[0176] It should be understood that if the second resource units are all the resource units in the first resource units, the transmission power of the station (i.e., the first transmission power) can also be determined using embodiment 3.

[0177] In an optional embodiment, the transmission power of the station (i.e., the first transmission power) may be determined based on the indication of the AP transmission power subfield, the indication of the uplink target received power subfield, and one fixed value (or constant). The fixed value may be 3 dB. In particular, the calculation method (or determination method) of the first transmission power (i.e., the transmission power of the station) may be represented by the following Equation (2-5).

number

[0178] In the above formula (2-5),

number

[0179] In some scenarios or embodiments, the size of the second resource unit (adaptation RU) is not more than half the size of the first resource unit (originally allocated MRU / RU). Thus, the transmit power requirement of the station can be met by subtracting 3 dB.

[0180] In another optional embodiment, the station's transmission power (i.e., the first transmission power) may also be calculated using the above formula (1-1), that is, the station's transmission power (the first transmission power) is determined based on the indication of the AP transmission power subfield and the indication of the uplink target received power subfield. In other words, even if the size of the RU / MRU actually used by the station does not match the size of the RU / MRU allocated to the station, the manner of calculating the station's transmission power remains unchanged.

[0181] It should be understood that the transmission power of the station (i.e., the first transmission power) still cannot exceed the limitations of hardware capabilities, supervisory requirements, local maximum transmission power levels, and non-802.11 device coexistence requirements, etc. For details, please refer to the description of embodiment 3. The details will not be described again here.

[0182] Optionally, the first access point may further indicate in the trigger frame a calculation scheme that may be used by the station to calculate the first transmission power. In particular, the trigger frame further includes indication information, and the indication information indicates a scheme for determining / calculating the first transmission power. The indication information may be carried in the common information field or the user information field of the trigger frame. The scheme for determining the first transmission power includes one or more of the following, namely, one or more of a first determination scheme, a second determination scheme, a third determination scheme, and a fourth determination scheme. The first determination scheme is embodiment 1, the second determination scheme is embodiment 2, the third determination scheme is embodiment 3, and the fourth determination scheme is to determine based on the indication of the AP transmission power subfield and the indication of the uplink target received power subfield, in other words, the calculation scheme of the above formula (1-1) is used.

[0183] Optionally, in one embodiment, the length of the indication information may be 1 bit, and the indication information indicates whether the transmission power of the station is variable. For example, when the value of the bit is 1, it indicates that the transmission power of the station is variable, and when the value of the bit is 0, it indicates that the transmission power of the station is not changeable. Or, conversely, when the value of the bit is 0, it indicates that the transmission power of the station is variable, and when the value of the bit is 1, it indicates that the transmission power of the station is not changeable. When the indication information indicates that the transmission power of the station is variable, it implicitly indicates that the manner of determining the transmission power of the station (i.e., the first transmission power) is one of embodiment 1, embodiment 2, and embodiment 3. In particular, any of embodiment 1, embodiment 2, and embodiment 3 can be determined based on the specification of the later standard. When the indication information indicates that the transmission power of the station is not changeable, it implicitly indicates that the manner of determining the transmission power of the station (i.e., the first transmission power) is the calculation manner of the above-mentioned formula (1-1).

[0184] In another embodiment, the indication information may be represented in the form of a bitmap, and the length of the bitmap may be 4 bits. The 4 bits in the indication information respectively represent 4 determination methods. One bit in the indication information indicates whether the station supports the determination method corresponding to the bit. For example, 1 indicates support, and 0 indicates no support. If the indication information is 0011, it indicates that the station supports the third determination method (i.e., embodiment 3) and the fourth determination method. For example, 1 indicates support, and 0 indicates no support. If the indication information is 1000, it indicates that the station supports the first determination method (i.e., embodiment 1).

[0185] It should be understood that although the present embodiment of the present application mainly uses trigger frames as an example, it may also be applicable to triggering forms of TB PPDUs, such as triggered response scheduling (TRS) control subfields.

[0186] It can be seen that this embodiment of the present application provides several ways to calculate the transmission power of a station in a scenario where the station uses an adaptive RU to transmit, which can solve the transmission power problem of the station in this scenario, reduce the interference of the station to other devices, and control the power of receiving TB PPDU by the AP within the controllable range of the AP.

[0187] EMBODIMENT 2 Embodiment 2 of the present application mainly describes modifying the meaning of the corresponding subfield in the trigger frame to reduce the impact on the transmission power of the station when the station uses the adaptive RU to transmit the TB PPDU.

[0188] 10 is another schematic flowchart of a method for determining a transmission power in a wireless local area network according to an embodiment of the present application. As shown in FIG. 10, the method for determining a transmission power in a wireless local area network includes, but is not limited to, the following steps:

[0189] S201: A first access point transmits a trigger frame, where the trigger frame indicates a first resource unit allocated to a station, where the trigger frame includes an AP transmit power subfield and an uplink target received power subfield, where the uplink target received power subfield indicates a received power expected by the first access point at each 20 MHz, where the unit of the received power is dBm / 20 MHz.

[0190] S202: A station receives a trigger frame.

[0191] S203: The station transmits a trigger-based physical layer protocol data unit TB PPDU at a first transmit power, and a second resource unit occupied by the TB PPDU is all or a part of the resource units among the first resource units, and the first transmit power is determined based on an indication of the AP transmit power subfield and an indication of the uplink target received power subfield.

[0192] S204: The first access point receives the TB PPDU, and the power at which the first access point receives the TB PPDU is determined based on the first transmit power and a path loss from the first access point to the station.

[0193] Optionally, the first access point transmits a trigger frame, which is used to trigger the station to transmit the TB PPDU, and the trigger frame further indicates the first resource unit allocated to the station. After receiving the trigger frame, the station may select a second resource unit from the first resource unit in which the TB PPDU is actually transmitted based on a channel busy or idle state detected by sensing in the first resource unit. In other words, the second resource unit occupied by the TB PPDU is all or a part of the resource units in the first resource unit. The trigger frame includes an AP transmit power subfield and an uplink target receive power subfield, where the uplink target receive power subfield indicates a receive power expected by the first access point at each 20 MHz, and the unit of the receive power is dBm / 20 MHz. The station may determine the transmit power of the station based on the second resource unit and the indication of the AP transmit power subfield in the trigger frame (for ease of description, in this embodiment of the present application, the transmit power of the station is called the first transmit power). For the specific calculation method, please refer to the above formula (1-1). The station transmits the TB PPDU in the second resource unit at the determined first transmission power, for example, transmits the EHT TB PPDU. Correspondingly, the first access point receives the TB PPDU and returns an acknowledgement frame to the station. The power at which the first access point receives the TB PPDU is determined based on the first transmission power and the path loss from the first access point to the station. For example, the power at which the first access point receives the TB PPDU is equal to the difference between the first transmission power and the path loss from the first access point to the station.

[0194] It should be understood that the uplink target received power subfield indicates the received power expected by the first access point at each 20 MHz, and the unit of the received power is dBm / 20 MHz. Therefore, the unit of the transmission power of the station calculated according to the above formula (1-1) is also dBm / 20 MHz. In other words, the first transmission power is the transmission power of the station at each 20 MHz.

[0195] Optionally, the uplink target received power subfield specified in the current 802.11be indicates the received power expected by the AP (in the total bandwidth), in other words, the received power expected by the AP in the current 802.11be is the total power, in dBm. Therefore, when the uplink target received power subfield indicates the received power expected by the AP in each 20 MHz, the received power (in dBm) expected by the AP in the maximum bandwidth (i.e., 320 MHz) supported by 802.11be should be reduced to dBm / 20MHz, in other words, should be reduced by 1 / 16, i.e., 12 dB should be subtracted from the received power expected by the AP corresponding to each bandwidth. However, for a PPDU with the minimum bandwidth (i.e., 20 MHz) supported by 802.11be, the maximum value of the current received power expected by the AP can still be used as the received power expected by the AP in each 20 MHz. In other words, when the uplink target received power subfield indicates the received power expected by the AP at each 20 MHz, the maximum value of the received power expected by the AP in 802.11be may remain unchanged, but the minimum value needs to be reduced.

[0196] In one embodiment, a reserved value of the uplink target received power subfield may be used to support the 12 dB indication. For example, one reserved value of the uplink target received power subfield indicates a 1 dB increase or decrease. For example, the values ​​of the uplink target received power subfield in the trigger frame and corresponding descriptions are shown in Table 2 below. valTargetRx indicates the value indicated by the uplink target received power subfield. pwr indicates the expected received power. The uplink target received power subfield indicates the received power expected by the first access point at each 20 MHz, and the unit of received power is dBm / 20 MHz. From Table 2, when the value of the uplink target received power subfield is 0 to 90, F val It can be seen that the value of the uplink target received power subfield is also 0 to 90. When the value of the uplink target received power subfield is 91 to 102, F val are -12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, and -1, respectively. It should be understood that the values ​​of the uplink target received power subfield here, i.e., 91 to 102, are only examples, and any of the 12 reserved values ​​(91 to 126) can indicate this value. When the value of the uplink target received power subfield is 103 to 126, it still indicates reserved. When the value of the uplink target received power subfield is 127, the expected received power (i.e., TargetRx pwr ) is the maximum transmit power of a station for its assigned HE-MCS minus the path loss (i.e., PL DL In Table 2, the expected received power (i.e., TargetRx pwr It should be appreciated that the maximum value of is still −20 dBm / 20 MHz and the minimum value is −122 dBm / 20 MHz.

[0197] [Table 2]

[0198] In other embodiments, the range can be increased by increasing the power representation interval of each entry value interval in the uplink target received power subfield. For example, (-20+122) / 91 ≈ 1.12. Thus, the original expression TargetRx pwr =-110+F val TargetRx pwr=-122+1.1F val , or TargetRx pwr =-122+1.2F val In this case, if the value range of the uplink target received power subfield is 0 to 90, it can indicate that the received power expected by the first access point in each 20 MHz is -122 dBm to -20 dBm. For example, the values ​​of the uplink target received power subfield in the trigger frame and the corresponding descriptions can be shown in Table 3 below. val TargetRx indicates the value indicated by the uplink target received power subfield. pwr indicates the expected received power. The uplink target received power subfield indicates the received power expected by the first access point at each 20 MHz, and the unit of received power is dBm / 20 MHz. From Table 3, when the value of the uplink target received power subfield is 0 to 90, F val Also 0 to 90, TargetRx pwr =-122+1.1F val , or TargetRx pwr =-122+1.2F val When the value of the uplink target received power subfield is 91 to 126, it indicates reserved. When the value of the uplink target received power subfield is 127, it indicates the expected received power (i.e., TargetRx pwr ) is the maximum transmit power of a station for its assigned HE-MCS minus the path loss (i.e., PL DL ) is subtracted.

[0199] [Table 3]

[0200] The change in the value of the uplink target received power subfield in both Tables 2 and 3 corresponds to the expected received power (i.e., TargetRx pwrIt should be understood that this does not affect the manner in which the power representation interval is calculated, i.e., whether a reserved value is used for indication or whether the power representation interval is increased.

[0201] In yet another embodiment, the two previous embodiments may be combined. In one example, the reserved values ​​of the uplink target received power subfield are used to support an indication of 12 dB. For example, a reserved value less than 12 is used to support an indication of the received power expected by the first access point at each 20 MHz of -122 dBm to -111 dBm, and this range may be increased by increasing the power representation interval of the entry value interval of the reserved value less than 12. In another example, a total of 95 values ​​(e.g., 0 to 94) are used to represent the support of an indication of the received power expected by the first access point at each 20 MHz of -122 dBm to -111 dBm, and this range may be increased by increasing the power representation interval of the entry value interval of the 95 values.

[0202] Of course, the received power expected by the first access point in each 20 MHz may also be calculated in the new manner, such that the range of the received power expected by the first access point is -122 dBm to -20 dBm.

[0203] In an optional embodiment, the uplink target received power subfield is also present in the triggered response scheduling (TRS) control subfield. Thus, when the uplink target received power subfield indicates the received power expected by the AP at each 20 MHz, the power representation interval of each entry value interval of the uplink target received power subfield in the TRS control field can be increased to increase the range. (-30+102) / 31 ≈ 2.32. Thus, the original formula TargetRx pwr =-90+2×F val TargetRx pwr =-90+2.3×F val , or TargetRxpwr =-122+2.4×F val In this case, if the value range of the uplink target received power subfield is 0 to 30, it can indicate that the received power expected by the first access point in each 20 MHz is -102 dBm to -30 dBm. For example, the values ​​of the uplink target received power subfield in the TRS control field and the corresponding description can be shown in Table 4 below. val TargetRx indicates the value indicated by the uplink target received power subfield. pwr denotes the expected received power.

[0204] [Table 4]

[0205] The change in the value of the uplink target received power subfield in Table 4 corresponds to the expected received power (i.e., TargetRx pwr It should be understood that this does not affect the way in which power representation intervals are calculated, i.e., the power representation interval is increased.

[0206] It should be further understood that although the present embodiment of the present application mainly uses trigger frames as an example, it may also be applicable to triggering forms of TB PPDUs, such as TRS control subfields.

[0207] It can be seen that in this embodiment of the present application, the unit of the uplink target received power in the EHT user information field is changed from dBm to dBm / 20MHz. In this case, the value indicated by the uplink target received power subfield in the EHT user information field is no longer the total power, but the power per 20MHz. This can reduce the impact on the station's transmission power when the station uses the adaptive RU to transmit the TB PPDU, reduce the station's interference to other devices, and control the power of receiving the TB PPDU by the AP within the controllable range of the AP.

[0208] EMBODIMENT 3 The third embodiment of the present application mainly describes the transmission power design of PSRT PPDU when a station uses adaptive RU to transmit TB PPDU in OBSS scenario. This embodiment modifies the spatial reuse read rule by obtaining the adaptive RU used by a station to transmit TB PPDU, so as to solve the transmission power problem of PSRT PPDU.

[0209] Optionally, the third embodiment of the present application may be implemented independently or in combination with the first embodiment or the second embodiment. When the third embodiment of the present application is implemented in combination with the first embodiment or the second embodiment, the trigger frame in the first embodiment or the second embodiment may be carried in the PSRR PPDU.

[0210] Optionally, the first access point and the second access point in this embodiment of the present application may be located in the same BSS. For example, the first access point is AP1 in Fig. 5a, and the second access point is AP2 in Fig. 5a. In this embodiment of the present application, the first station is associated with the first access point, or the first access point and the first station are located in one BSS. In this embodiment of the present application, the second station is associated with the second access point, or the second access point and the second station are located in the other BSS.

[0211] 11A and 11B are schematic flowcharts of a method for determining transmit power based on spatial reuse according to one embodiment of the present application. As shown in FIG. 11A and 11B, the method for determining transmit power based on spatial reuse includes, but is not limited to, the following steps:

[0212] S301: A first access point transmits a parameterized spatial reuse receive PSRR physical layer protocol data unit PPDU including a trigger frame, where the trigger frame indicates a first resource unit allocated to a first station.

[0213] S302: The first station receives a PSRR PPDU including a trigger frame.

[0214] S303: A second access point receives a PSRR PPDU including a trigger frame.

[0215] S304: The first station transmits a trigger-based physical layer protocol data unit TB PPDU, where the second resource units occupied by the TB PPDU are some resource units among the first resource units.

[0216] S305: The first access point receives the TB PPDU.

[0217] S306: The second access point determines second resource units occupied by the TB PPDU, where the second resource units are a portion of the first resource units.

[0218] S307: The second access point transmits a PSRT PPDU at a transmission power of a parameterized spatial reuse PSRT physical layer protocol data unit PPDU, and the transmission power of the PSRT PPDU is determined based on the first resource unit, the second resource unit, an indication of the EHT parameterized spatial reuse PSR field included in the TB PPDU, and / or an indication of the EHT uplink parameterized spatial reuse UL PSR field included in the trigger frame, as well as a reception power at which the PSRR PPDU is received by the second access point.

[0219] S308: The second station receives the PSRT PPDU.

[0220] Optionally, the first access point transmits a PSRR PPDU including a trigger frame, where the trigger frame is used to schedule the first station to transmit a TB PPDU, and the trigger frame further indicates a first resource unit allocated to the first station. Correspondingly, the first station receives the PSRR PPDU including the trigger frame. The first access point and the second access point are arranged in the same OBSS. Thus, the second access point may also receive the PSRR PPDU including the trigger frame transmitted by the first access point. After receiving the PSRR PPDU including the trigger frame, the first station may select a second resource unit from the first resource unit where the TB PPDU is actually transmitted based on a channel busy or idle state detected by sensing in the first resource unit. The first station may calculate the transmission power of the first station and transmit the TB PPDU in the second resource unit with the calculated transmission power, for example, transmit the EHT TB PPDU. In response, the first access point receives the TB PPDU and returns an acknowledgement frame to the first station. The second access point may also receive the TB PPDU. The second access point may determine the second resource units occupied by the TB PPDU transmitted by the first station in a blind detection manner. Alternatively, the second access point may determine the second resource units occupied by the TB PPDU by analyzing signaling (e.g., a U-SIG field) in the TB PPDU. The second resource units are a portion of the first resource units. The second access point may determine the transmit power of the second access point (i.e., the transmit power of the PSRT PPDU) based on the first resource units, the second resource units, an indication of the EHT parameterized spatial reuse PSR field included in the TB PPDU, and / or an indication of the EHT uplink parameterized spatial reuse UL PSR field included in the trigger frame, and a receive power of receiving the PSRR PPDU by the second access point.In other words, the signaling of adaptive RU in TB PPDU can indicate the validation of spatial reuse. Then, the second access point transmits PSRT PPDU with the determined transmission power of PSRT PPDU. Correspondingly, the second station receives PSRT PPDU. For the manner in which the first station calculates the transmission power of the first station, please refer to the corresponding description in embodiment 1 or embodiment 2. Details will not be described again here.

[0221] It should be understood that this embodiment of the present application uses the example of the second access point sending the PSRT PPDU for illustration. In practical application, a station (for example, a third station) may send the PSRT PPDU, and the method of calculating the transmission power of the PSRT PPDU remains unchanged.

[0222] Optionally, the transmission power of the PSRT PPDU is equal to or less than the difference between the PSR value and the received power (RPL) at which the PSRR PPDU is received by the second access point. The PSR value may be determined based on the first resource unit, the second resource unit, an indication of the EHT PSR field included in the TB PPDU, and / or an indication of the EHT UL PSR field included in the trigger frame. It should be understood that the PSR value here may be the PSR value of the total bandwidth (here, the bandwidth for transmitting the PSRR PPDU).

[0223] Optionally, the first resource unit further includes a third resource unit, and the third resource unit is a difference set between the first resource unit and the second resource unit. In other words, the third resource unit is a resource unit that is not used to transmit a TB PPDU in the first resource unit. In one example, it is assumed that the first resource unit is a 2×996-tone RU, and the second resource unit is a 996+484-tone MRU. In this case, the third resource unit is a resource unit that is not used by the station in the first resource unit, i.e., a 484-tone RU that is not used to transmit a TB PPDU in the 2×996-tone RU. In another example, it is assumed that the first resource unit is a 3×996-tone MRU, and the second resource unit is a 2×996-tone RU. In this case, the third resource unit is a resource unit not used by the station in the first resource unit, ie, a 996-tone RU not used for transmitting a TB PPDU in the 3×996-tone MRU.

[0224] In some embodiments or scenarios, the second access point may directly determine the resource units (i.e., the third resource units) that are not used by the station in the first resource unit by blind detection, without needing to obtain a difference set between the first resource units assigned to the station and the second resource units actually occupied by the station. In some other embodiments or scenarios, the second access point may directly determine the resource units (i.e., the third resource units) that are not used by the station in the first resource unit by analyzing the U-SIG field in the TB PPDU, without needing to obtain a difference set between the first resource units assigned to the station and the second resource units actually occupied by the station.

[0225] Optionally, the transmission power of the PSRT PPDU in the third resource unit is less than or equal to the difference between the PSR value of the third resource unit and the received power of receiving the PSRR PPDU by the second access point in the third resource unit. It should be understood that the transmission power of the PSRT PPDU may be calculated with a granularity of a resource unit.

[0226] Optionally, the transmission power of the PSRT PPDU in one 20 MHz subchannel in which the third resource unit is located is less than or equal to the difference between the PSR value of the 20 MHz subchannel and the receiving power of the PSRR PPDU received by the second access point in the 20 MHz subchannel. It should be understood that the transmission power of the PSRT PPDU may be calculated with the granularity of the 20 MHz subchannel.

[0227] Optionally, the PSR value of the third resource unit may be −26 dBm or positive infinity. The PSR value of one 20 MHz subchannel is −26 dBm or positive infinity. In other words, the spatial reuse restriction corresponding to the resource unit (i.e., the third resource unit) determined by detection by the second access point as not actually used within the MRU / RU assigned to the TB PPDU may be removed. It may also be understood that the PSR value of the resource unit may be infinity. Alternatively, the spatial reuse restriction corresponding to the resource unit (i.e., the third resource unit) determined by detection by the second access point as not actually used within the MRU / RU assigned to the TB PPDU may be reduced. It may also be understood that the maximum value (−26 dBm) in Table 1 may be selected as the PSR value of the resource unit. In other words, once the PSRT PPDU finds that the TB-PPDU is an adaptive PPDU, the limitation of the corresponding spatial reuse can be ignored, which indicates the cancellation of the power limitation in PSRT PPDU in the corresponding part(or set it to the largest number).

[0228] Of course, the maximum transmission power limit of the second access point still needs to be taken into consideration here. Specifically, the transmission power of the PSRT PPDU in the third resource unit or in the 20MHz subchannel in which the third resource unit is located cannot exceed the maximum transmission power of the second access point. Alternatively, when the transmission power of the PSRT PPDU in the third resource unit or in the 20MHz subchannel in which the third resource unit is located exceeds the maximum transmission power of the second access point, the second access point transmits the PSRT PPDU at the maximum transmission power of the second access point.

[0229] Optionally, the PSR value of the third resource unit may be the sum of the value indicated by the first EHT PSR field included in the TB PPDU and a preset value. Alternatively, the PSR value of the third resource unit may be the sum of the value indicated by the first EHT UL PSR field included in the trigger frame and a preset value. The PSR value of one 20 MHz subchannel is the sum of the value indicated by the first EHT PSR field included in the TB PPDU and a preset value. Alternatively, the PSR value of one 20 MHz subchannel is the sum of the value indicated by the first EHT UL PSR field included in the trigger frame and a preset value. The preset value may be 3 dB. In other words, the spatial reuse restriction corresponding to the resource unit (i.e., the third resource unit) determined by detection by the second access point to be not actually used within the MRU / RU allocated to the TB PPDU may be reduced. It may also be understood as adding X dB to the original value. For example, X is equal to 3. X is a positive integer. Of course, the maximum transmission power limit of the second access point still needs to be taken into account here.

[0230] Optionally, the PSR value of the third resource unit may be the greater of the values ​​indicated by the two EHT PSR fields included in the TB PPDU. Alternatively, the PSR value of the third resource unit may be the greater of the values ​​indicated by the two EHT UL PSR fields included in the trigger frame. Similarly, the PSR value of one 20 MHz subchannel is the greater of the values ​​indicated by the two EHT PSR fields included in the TB PPDU. Alternatively, the PSR value of one 20 MHz subchannel may be the greater of the values ​​indicated by the two EHT UL PSR fields included in the trigger frame.

[0231] The first EHT PSR field / first EHT UL PSR field corresponds to the third resource unit, or the frequency indication range of the first EHT PSR field / first EHT UL PSR field includes the third resource unit, or the frequency indication range of the first EHT PSR field / first EHT UL PSR field overlaps with the third resource unit. It should be understood that the frequency indication range of the first EHT PSR field is associated with a bandwidth (where the bandwidth is the bandwidth allocated to the station by the first access point). When the bandwidth is 20 MHz, the frequency indication range of the first EHT PSR field is 20 MHz. When the bandwidth is 40 MHz, the frequency indication range of the first EHT PSR field is 40 MHz. When the bandwidth is 80 MHz, the frequency indication range of the first EHT PSR field is 40 MHz. When the bandwidth is 160 MHz, the frequency indication range of the first EHT PSR field is 80 MHz. When the bandwidth is 320 MHz, the frequency indication range of the first EHT PSR field is 160 MHz.

[0232] The following uses an example with reference to the resource unit shown in Figure 12. Figure 12 is a schematic diagram of a first resource unit, a second resource unit, and a third resource unit according to an embodiment of the present application. As shown in Figure 12, the first resource unit (or the first allocated) is a 2x996-tone RU including eight 20MHz subchannels, the second resource unit (or the one actually used to transmit the TB PPDU) is a 996+484-tone MRU including six 20MHz subchannels, and one 484-tone RU (i.e., the third resource unit) of the 2x996-tone RU is not used (for example, the 484-tone RU formed by the third 20MHz subchannel and the fourth 20MHz subchannel from left to right in Figure 12). In a possible embodiment, the second access point sets the PSR value of the unused 484-tone RU (e.g., the 484-tone RU formed by the third 20 MHz subchannel and the fourth 20 MHz subchannel in FIG. 12) to infinity (i.e., positive infinity). In other words, the unused 484-tone RU (e.g., the 484-tone RU formed by the third 20 MHz subchannel and the fourth 20 MHz subchannel in FIG. 12) does not need to comply with the spatial reuse value limit. In another possible embodiment, the second access point sets the PSR value of the unused 484-tone RU (e.g., the 484-tone RU formed by the third 20 MHz subchannel and the fourth 20 MHz subchannel in FIG. 12) to the maximum value (i.e., −26 dBm) or adds one preset value (e.g., 3 dB) to the original value. In other words, an unused 484-tone RU (e.g., a 484-tone RU formed by the third 20 MHz subchannel and the fourth 20 MHz subchannel in FIG. 12) may have a larger PSR value. The unused 484-tone RU is located in the first 80 MHz, and the frequency indication range of the EHT PSR1 field and the EHT UL PSR1 field of the 160 MHz bandwidth is the first 80 MHz.Therefore, adding one preset value based on the original value may be understood as adding one preset value to the value indicated by the EHT PSR1 field / the value indicated by the EHT UL PSR1 field.

[0233] In this embodiment of the present application, it can be seen that in an OBSS scenario, the second access point modifies the spatial reuse read rule by acquiring the adaptive RU used by the station to transmit the TB PPDU, in order to solve the transmission power problem of the PSRT PPDU, which can increase the transmission power of the second access point, so that the second access point obtains a larger gain.

[0234] EMBODIMENT 4 Embodiment 4 of the present application mainly describes the design of the EHT PSR field when a station uses an adaptive RU to transmit a TB PPDU in an OBSS scenario. The value of the EHT PSR field is mainly set by directly modifying the meaning of spatial reuse in the TB PPDU with reference to the relevant indication of the adaptive RU.

[0235] Optionally, the embodiment 4 of the present application may be implemented independently or in combination with the embodiment 1 or embodiment 2. When the embodiment 4 of the present application is implemented in combination with the embodiment 1 or embodiment 2, the trigger frame in the embodiment 1 or embodiment 2 may be carried in the PSRR PPDU.

[0236] Optionally, the first access point and the second access point in this embodiment of the present application may be located in the same BSS. For example, the first access point is AP1 in Fig. 5a, and the second access point is AP2 in Fig. 5a. In this embodiment of the present application, the first station is associated with the first access point, or the first access point and the first station are located in one BSS. In this embodiment of the present application, the second station is associated with the second access point, or the second access point and the second station are located in the other BSS.

[0237] It should be understood that the difference between embodiment 4 and embodiment 3 is that in this application, the signaling of the TB PPDU is not modified in embodiment 3, but the signaling of the TB PPDU is directly modified in embodiment 4 of the present application.

[0238] 13 is a schematic flowchart of a method for determining a spatial reuse parameter field in a PPDU according to an embodiment of the present application. As shown in FIG. 13, the method for determining a spatial reuse parameter field in a PPDU includes, but is not limited to, the following steps:

[0239] S401: A first access point transmits a parameterized spatial reuse receive PSRR physical layer protocol data unit PPDU including a trigger frame, where the trigger frame indicates a first resource unit allocated to a first station.

[0240] S402: The first station receives a PSRR PPDU including a trigger frame.

[0241] S403: A second access point receives a PSRR PPDU including a trigger frame.

[0242] S404: The first station transmits a trigger-based physical layer protocol data unit TB PPDU, and the second resource unit occupied by the TB PPDU is a part of the first resource unit. The TB PPDU includes a first EHT PSR field and a second EHT PSR field. The value indicated by the first EHT PSR field is determined based on the first resource unit and the second resource unit. The value indicated by the second EHT PSR field is the same as the value indicated by the second EHT UL PSR field included in the trigger frame.

[0243] S405: The first access point receives the TB PPDU.

[0244] S406: The second access point transmits a PSRT PPDU at a transmission power of a parameterized spatial reuse PSRT physical layer protocol data unit PPDU, and the transmission power of the PSRT PPDU is determined based on an indication of the first EHT PSR field, an indication of the second EHT PSR field, and a reception power at which the second access point receives the PSRR PPDU.

[0245] S407: The second station receives the PSRT PPDU.

[0246] Optionally, the first access point transmits a PSRR PPDU including a trigger frame, where the trigger frame is used to schedule the first station to transmit a TB PPDU, and the trigger frame further indicates a first resource unit allocated to the first station. Correspondingly, the first station receives the PSRR PPDU including the trigger frame. The first access point and the second access point are arranged in the same OBSS. Therefore, the second access point may also receive the PSRR PPDU including the trigger frame transmitted by the first access point. After receiving the PSRR PPDU including the trigger frame, the first station may select a second resource unit from the first resource unit where the TB PPDU is actually transmitted based on a channel busy or idle state detected by sensing in the first resource unit. In other words, the second resource unit occupied by the TB PPDU is a part of the resource units among the first resource units. The first station may calculate the transmission power of the first station and transmit the TB PPDU in the second resource unit at the calculated transmission power, for example, may transmit the EHT TB PPDU. The TB PPDU includes a first EHT PSR field and a second EHT PSR field. The value indicated by the first EHT PSR field is determined based on the first resource unit and the second resource unit. The value indicated by the second EHT PSR field is the same as the value indicated by the second EHT UL PSR field included in the trigger frame. In response, the first access point receives the TB PPDU and returns an acknowledgement frame to the first station. The second access point may also receive the TB PPDU.In other words, once the TB-PPDU selects adaptive RU, the corresponding spatial reuse value can be changed dynamically by the STA transmitting the TB-PPDU, indicating no need to copy in those parts. For the manner in which the first station calculates the transmission power of the first station, please refer to the corresponding description in embodiment 1 or embodiment 2. Details will not be described again here.

[0247] After receiving the TB PPDU, the second access point may determine the transmission power of the second access point (i.e., the transmission power of the PSRT PPDU) according to the indication of the first EHT PSR field, the indication of the second EHT PSR field, and the reception power of the PSRR PPDU received by the second access point. For a specific manner of calculating the transmission power of the PSRT PPDU, please refer to the above formula (1-3). Details will not be described again here. Then, the second access point transmits the PSRT PPDU with the determined transmission power of the PSRT PPDU. Correspondingly, the second station receives the PSRT PPDU.

[0248] It should be understood that this embodiment of the present application uses the example of the second access point sending the PSRT PPDU for illustration. In practical application, a station (for example, a third station) may send the PSRT PPDU, and the method of calculating the transmission power of the PSRT PPDU remains unchanged.

[0249] Optionally, the first resource unit further includes a third resource unit, and the third resource unit is a difference set between the first resource unit and the second resource unit. In other words, the third resource unit is a resource unit that is not used to transmit a TB PPDU in the first resource unit. In one example, it is assumed that the first resource unit is a 2×996-tone RU, and the second resource unit is a 996-tone RU. In this case, the third resource unit is a resource unit that is not used by the first station in the first resource unit, i.e., a 996-tone RU that is not used to transmit a TB PPDU in the 2×996-tone RU.

[0250] Optionally, if the frequency range of the third resource unit is equal to or greater than the frequency range of the first EHT PSR field included in the TB PPDU, the value indicated by the first EHT PSR field is -26 dBm or positive infinity. In other words, if the frequency range of the resource unit (i.e., the third resource unit) that is not actually used in the MRU / RU allocated to the TB PPDU is equal to or greater than the frequency range of the specific EHT PSR field, the spatial reuse value limit of the resource unit may be removed. It may also be understood that the PSR value of the resource unit may be infinity, i.e., the EHT PSR field is changed to indicate infinity. Alternatively, if the frequency range of the resource unit (i.e., the third resource unit) that is not actually used in the MRU / RU allocated to the TB PPDU is equal to or greater than the frequency range of the specific EHT PSR field, the spatial reuse value limit of the resource unit may be reduced. It can also be understood that the maximum value (-26 dBm) in Table 1 can be selected as the PSR value of the resource unit, i.e., the EHT PSR field is modified to indicate that the value is equal to or greater than -26 dBm, i.e., the value of the EHT PSR field is 14. In other words, spatial reuse may have different granularities, if the corresponding Y MHz is not used by that adaptive RU / MRU, the configuration can be set to no limitation (or set to the largest number). Y is a positive integer, and the value of Y can be 20, 40, 80, 160, or 320, etc.

[0251] The following uses an example with reference to the resource unit and frequency indication range of the EHT PSR field shown in Figure 14. Figure 14 is a schematic diagram of the third resource unit and the frequency indication range of the EHT PSR field according to one embodiment of the present application. As shown in Figure 14, the first resource unit (or the first allocated) is a 2x996-tone RU including eight 20MHz subchannels, the second resource unit (or the one actually used to transmit the TB PPDU) is a 996-tone RU including four 20MHz subchannels (from the fifth 20MHz subchannel to the eighth 20MHz subchannel from the left to the right in Figure 14), and one 996-tone RU (i.e., the third resource unit) of the 2x996-tone RU is not used. (For example, from the first 20MHz subchannel to the fourth 20MHz subchannel from the left to the right in Figure 14). Since the bandwidth of the first resource unit is 160MHz, in the 160MHz bandwidth, the frequency indication range of the EHT PSR1 field and the EHT UL PSR1 field is the first 80MHz, and the frequency indication range of the EHT PSR2 field and the EHT UL PSR2 field is the second 80MHz. In addition, the bandwidth of the third resource unit (for example, the first 20MHz subchannel to the fourth 20MHz subchannel from left to right in FIG. 14) is 80MHz, which is the first 80MHz, so the frequency range of the third resource unit is equal to the frequency indication range of the EHT PSR1 field. In this case, it is considered that the EHT PSR1 field is modified to indicate the maximum value, and the spatial reuse value of the frequency band corresponding to the EHT PSR1 field can be removed. Alternatively, the EHT PSR1 field is directly modified to indicate infinity (currently, this entry does not exist in Table 1, so one entry may be added to Table 1 to indicate infinity).

[0252] Optionally, if the frequency range of the third resource unit is equal to or greater than the frequency indication range of the first EHT PSR field included in the TB PPDU, the value indicated by the first EHT PSR field is the sum of the value indicated by the first EHT UL PSR field included in the trigger frame and a preset value. The preset value may be 3 dB. In other words, if the frequency range of the resource unit that is not actually used (i.e., the third resource unit) in the MRU / RU allocated to the TB PPDU is equal to or greater than the frequency indication range of a specific EHT PSR field, the spatial reuse value limit of the resource unit may be reduced. It may also be understood that the PSR value of the resource unit may be increased by a specific value, for example, 3 dB, i.e., the EHT PSR field is changed to indicate the sum of the value indicated by the first EHT UL PSR field and a preset value.

[0253] Optionally, if the frequency range of the third resource unit is equal to or greater than the frequency indication range of the first EHT PSR field included in the TB PPDU, the value indicated by the first EHT PSR field is the greater of the value indicated by the first EHT UL PSR field included in the trigger frame and the value indicated by the second EHT UL PSR field. In other words, if the frequency range of the actually unused resource unit (i.e., the third resource unit) in the MRU / RU allocated to the TB PPDU is equal to or greater than the frequency indication range of a certain EHT PSR field, the value indicated by the EHT PSR field is the greater of the values ​​indicated by the two EHT UL PSR fields included in the trigger frame.

[0254] It should be understood that if the frequency range of the third resource unit is smaller than the frequency indication range of the first EHT PSR field included in the TB PPDU, the value of the first EHT PSR field is directly copied from the value of the first EHT UL PSR field included in the trigger frame.

[0255] It can be seen that in this embodiment of the present application, in an OBSS scenario, the first station sets the value of the EHT PSR field by directly modifying the meaning of spatial reuse in the TB PPDU with reference to the relevant instruction of the adaptive RU, which solves the transmission power problem of the PSRT PPDU and can increase the transmission power of the second access point, so that the second access point obtains a greater gain.

[0256] The foregoing describes in detail the method provided in the present application. In order to facilitate the implementation of the foregoing solutions in the embodiments of the present application, the embodiments of the present application further provide a corresponding apparatus or device.

[0257] In the embodiment of the present application, the access point and the station may be divided into functional modules based on the above-mentioned method example. For example, each functional module may be obtained by division based on each function, or two or more functions may be integrated into one processing module. The integrated module may be implemented in the form of hardware or in the form of a software functional module. It should be noted that the module division in the present embodiment of the present application is an example and is merely a logical division of functions. In actual implementation, there may be other division methods. The following describes in detail the communication device in the embodiment of the present application with reference to Figures 15 to 17. The communication device is an access point or a station. Furthermore, the communication device may be a device in an AP, or the communication device may be a device in a STA.

[0258] When the integrated unit is used, FIG. 15 is a schematic diagram of the structure of a communication device 1 according to an embodiment of the present application. As shown in FIG. 15, the communication device 1 includes a second unit 11 and optionally includes a processing unit 12.

[0259] In a first design, the communication device 1 may be a first access point or a chip in the first access point, for example a Wi-Fi chip. The second unit 11 is configured to transmit a trigger frame, where the trigger frame indicates a first resource unit allocated to the station. The trigger frame includes an access point AP transmit power subfield and an uplink target receive power subfield. The second unit 11 is further configured to receive a TB PPDU. The power at which the TB PPDU is received is determined based on the first transmit power and a path loss from the first access point to the station. The first transmit power is determined based on an indication of the AP transmit power subfield, an indication of the uplink target receive power subfield, the second resource unit, and the first resource unit. It should be understood that the second unit 11 is configured to perform receiving and transmitting functions, and the second unit 11 may also be referred to as a transceiver unit.

[0260] Optionally, the processing unit 12 is configured to generate a trigger frame.

[0261] Optionally, the first transmission power is determined based on the value indicated by the AP transmission power subfield, the value indicated by the uplink target received power subfield, the size of the second resource unit, and the size of the first resource unit.

[0262] Optionally, determining the first transmission power based on an indication of the AP transmission power subfield, an indication of the uplink target received power subfield, the second resource unit, and the first resource unit particularly includes determining the first transmission power based on an indication of the AP transmission power subfield, an indication of the uplink target received power subfield, and a ratio of a size of the second resource unit to a size of the first resource unit.

[0263] Optionally, the size of the first resource unit is determined based on a total number of subcarriers included in the first resource unit, and the size of the second resource unit is determined based on a total number of subcarriers included in the second resource unit.

[0264] Optionally, the first transmit power is:

number

[0265]

number

[0266] Optionally, the size of the first resource unit is determined based on the number of first bandwidth sizes included in the bandwidth of the first resource unit, and the size of the second resource unit is determined based on the number of first bandwidth sizes included in the bandwidth of the second resource unit.

[0267] Optionally, the first bandwidth size is any one of the following: 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz.

[0268] Optionally, the first transmit power is:

number

[0269]

number

[0270] Optionally, the bandwidth of the first resource unit is from the lowest frequency of the first resource unit to the highest frequency of the first resource unit and the bandwidth of the second resource unit is from the lowest frequency of the second resource unit to the highest frequency of the second resource unit, or the bandwidth of the first resource unit is the sum of the bandwidth occupied by one or more resource units included in the first resource unit and the bandwidth of the second resource unit is the sum of the bandwidth occupied by one or more resource units included in the second resource unit.

[0271] Optionally, the trigger frame further includes indication information, and the indication information indicates a manner of determining the first transmission power. The manner of determining the first transmission power includes one or more of the following, that is, one or more of a first determination manner, a second determination manner, and a third determination manner. The first determination manner is to determine based on a value indicated by the AP transmission power subfield, a value indicated by the uplink target received power subfield, a total number of subcarriers included in the second resource unit, and a total number of subcarriers included in the first resource unit. The second determination manner is to determine based on a value indicated by the AP transmission power subfield, a value indicated by the uplink target received power subfield, a number of first bandwidth sizes included in the bandwidth of the second resource unit, and a number of first bandwidth sizes included in the bandwidth of the first resource unit. The third determination manner is to determine based on an indication of the AP transmission power subfield and an indication of the uplink target received power subfield.

[0272] Optionally, the indication information is placed in a common information field or a user information field of the trigger frame.

[0273] It should be understood that the communication device 1 of the first design may perform the embodiment 1 correspondingly, and the aforementioned operations or functions of the units in the communication device 1 are configured to implement the corresponding operations of the first access point of the embodiment 1. For the sake of brevity, the details will not be described again here.

[0274] In a second design, the communication device 1 may be a first access point or a chip in the first access point, for example a Wi-Fi chip. The second unit 11 is configured to transmit a trigger frame, where the trigger frame indicates a first resource unit allocated to the station. The trigger frame includes an AP transmit power subfield and an uplink target receive power subfield. The uplink target receive power subfield indicates a receive power expected by the first access point at each 20 MHz, where the unit of the receive power is dBm / 20MHz. The second unit 11 is further configured to receive a TB PPDU. The second resource unit occupied by the TB PPDU is a full or partial resource unit in the first resource unit. The power at which the TB PPDU is received by the first access point is determined based on the first transmit power and a path loss from the first access point to the station. The first transmit power is determined based on an indication of the AP transmit power subfield and an indication of the uplink target receive power subfield. It should be understood that the second unit 11 is configured to perform receiving and transmitting functions, and the second unit 11 may also be referred to as a transceiver unit.

[0275] Optionally, the processing unit 12 is configured to generate a trigger frame.

[0276] It should be understood that the communication device 1 of the second design may correspondingly perform the embodiment 2, and the aforementioned operations or functions of the units in the communication device 1 are configured to implement the corresponding operations of the first access point of the embodiment 2. For the sake of brevity, the details will not be described again here.

[0277] In a third design, the communication device 1 may be a second access point or a chip in the second access point, for example a Wi-Fi chip. The second unit 11 is configured to receive a parameterized spatial reuse receive PSRR physical layer protocol data unit PPDU including a trigger frame, where the trigger frame indicates a first resource unit assigned to the station. The processing unit 12 is configured to determine a second resource unit occupied by a TB PPDU transmitted by the station, where the second resource unit is a portion of the first resource units. The second unit 11 is further configured to transmit the PSRT PPDU at a transmit power of the PSRT PPDU. The transmit power of the PSRT PPDU is determined based on the first resource unit, the second resource unit, an indication of the EHT parameterized spatial reuse PSR field included in the TB PPDU, and / or an indication of the EHT uplink parameterized spatial reuse UL PSR field included in the trigger frame, and a receive power of receiving the PSRR PPDU by the second access point. It should be understood that the second unit 11 is configured to perform receiving and transmitting functions, and the second unit 11 may also be referred to as a transceiver unit.

[0278] It should be understood that the communication device 1 of the third design may correspondingly perform the embodiment 3, and the aforementioned operations or functions of the units in the communication device 1 are configured to implement the corresponding operations of the second access point of the embodiment 3. For the sake of brevity, the details will not be described again here.

[0279] In a fourth design, the communication device 1 may be a first access point or a chip in the first access point, for example a Wi-Fi chip. The second unit 11 is configured to transmit a trigger frame, where the trigger frame indicates a first resource unit allocated to the first station. The second unit 11 is further configured to receive a TB PPDU. The second resource unit occupied by the TB PPDU is a part of the first resource unit. The TB PPDU includes a first EHT PSR field and a second EHT PSR field. The value indicated by the first EHT PSR field is determined based on the first resource unit and the second resource unit. The value indicated by the second EHT PSR field is the same as the value indicated by the second EHT UL PSR field included in the trigger frame. It should be understood that the second unit 11 is configured to perform receiving and transmitting functions, and the second unit 11 may also be referred to as a transceiver unit.

[0280] Optionally, the processing unit 12 is configured to generate a trigger frame.

[0281] It should be understood that the communication device 1 of the fourth design may correspondingly perform the embodiment 4, and the aforementioned operations or functions of the units in the communication device 1 are configured to implement the corresponding operations of the first access point of the embodiment 4. For brevity, the details will not be described again here.

[0282] 16 is a schematic diagram of the structure of a communication device 2 according to an embodiment of the present application. The communication device 2 may be a station or a chip in a station, such as a Wi-Fi chip. As shown in FIG. 16, the communication device 2 includes a first unit 21 and optionally includes a processing unit 22.

[0283] In a first design, the first unit 21 is configured to receive a trigger frame, where the trigger frame indicates a first resource unit allocated to the station, where the trigger frame includes an access point AP transmit power subfield and an uplink target receive power subfield. The first unit 21 is further configured to transmit a trigger-based physical layer protocol data unit TB PPDU at the first transmit power. The second resource unit occupied by the TB PPDU is a full or partial resource unit among the first resource units. The first transmit power is determined based on an indication of the AP transmit power subfield, an indication of the uplink target receive power subfield, the second resource unit, and the first resource unit. It should be understood that the first unit 21 is configured to perform receiving and transmitting functions, and the first unit 21 may also be referred to as a transceiver unit.

[0284] Optionally, the processing unit 22 includes a generating subunit 221, which is configured to generate a TB PPDU.

[0285] Optionally, the processing unit 22 further includes a determining subunit 222. The determining subunit 222 is configured to determine a first transmission power based on the indication of the AP transmission power subfield, the indication of the uplink target received power subfield, the second resource unit, and the first resource unit.

[0286] Optionally, the first transmission power is determined based on the value indicated by the AP transmission power subfield, the value indicated by the uplink target received power subfield, the size of the second resource unit, and the size of the first resource unit.

[0287] Optionally, determining the first transmission power based on an indication of the AP transmission power subfield, an indication of the uplink target received power subfield, the second resource unit, and the first resource unit particularly includes determining the first transmission power based on an indication of the AP transmission power subfield, an indication of the uplink target received power subfield, and a ratio of a size of the second resource unit to a size of the first resource unit.

[0288] Optionally, the size of the first resource unit is determined based on a total number of subcarriers included in the first resource unit, and the size of the second resource unit is determined based on a total number of subcarriers included in the second resource unit.

[0289] Optionally, the first transmit power is:

number

[0290]

number

[0291] Optionally, the size of the first resource unit is determined based on the number of first bandwidth sizes included in the bandwidth of the first resource unit, and the size of the second resource unit is determined based on the number of first bandwidth sizes included in the bandwidth of the second resource unit.

[0292] Optionally, the first bandwidth size is any one of the following: 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz.

[0293] Optionally, the first transmit power is:

number

[0294]

number

[0295] Optionally, the bandwidth of the first resource unit is from the lowest frequency of the first resource unit to the highest frequency of the first resource unit and the bandwidth of the second resource unit is from the lowest frequency of the second resource unit to the highest frequency of the second resource unit, or the bandwidth of the first resource unit is the sum of the bandwidth occupied by one or more resource units included in the first resource unit and the bandwidth of the second resource unit is the sum of the bandwidth occupied by one or more resource units included in the second resource unit.

[0296] Optionally, the trigger frame further includes indication information, and the indication information indicates a manner of determining the first transmission power. The manner of determining the first transmission power includes one or more of the following, that is, one or more of a first determination manner, a second determination manner, and a third determination manner. The first determination manner is to determine based on a value indicated by the AP transmission power subfield, a value indicated by the uplink target received power subfield, a total number of subcarriers included in the second resource unit, and a total number of subcarriers included in the first resource unit. The second determination manner is to determine based on a value indicated by the AP transmission power subfield, a value indicated by the uplink target received power subfield, a number of first bandwidth sizes included in the bandwidth of the second resource unit, and a number of first bandwidth sizes included in the bandwidth of the first resource unit. The third determination manner is to determine based on an indication of the AP transmission power subfield and an indication of the uplink target received power subfield.

[0297] Optionally, the indication information is placed in a common information field or a user information field of the trigger frame.

[0298] It should be understood that the communication device 2 of the first design may perform the embodiment 1 correspondingly, and the aforementioned operations or functions of the units in the communication device 2 are configured to implement the corresponding operations of the station of the embodiment 1. For the sake of brevity, the details will not be described again here.

[0299] In a second design, the first unit 21 is configured to receive a trigger frame, where the trigger frame indicates a first resource unit assigned to the station. The trigger frame includes an AP transmit power subfield and an uplink target receive power subfield. The uplink target receive power subfield indicates a receive power expected by the first access point at each 20 MHz, where the unit of the receive power is dBm / 20 MHz. The first unit 21 is further configured to transmit a trigger-based physical layer protocol data unit TB PPDU at the first transmit power, where the second resource unit occupied by the TB PPDU is a full or partial resource unit among the first resource units. The first transmit power is determined based on an indication of the AP transmit power subfield and an indication of the uplink target receive power subfield. It should be understood that the first unit 21 is configured to perform receiving and transmitting functions, and the first unit 21 may also be referred to as a transceiver unit.

[0300] Optionally, the processing unit 22 includes a generating subunit 221, which is configured to generate a TB PPDU.

[0301] Optionally, the processing unit 22 further includes a determining subunit 222. The determining subunit 222 is configured to determine a first transmission power based on an indication of the AP transmission power subfield and an indication of the uplink target received power subfield.

[0302] It should be understood that the communication device 2 of the second design may correspondingly perform the embodiment 2, and the aforementioned operations or functions of the units in the communication device 2 are configured to implement the corresponding operations of the station of the embodiment 2. For the sake of brevity, the details will not be described again here.

[0303] In a third design, the first unit 21 is configured to receive a PSRR PPDU including a trigger frame. The trigger frame indicates a first resource unit allocated to the station. The first unit 21 is further configured to transmit a TB PPDU. The second resource unit occupied by the TB PPDU is a part of the first resource units. The TB PPDU includes a first EHT PSR field and a second EHT PSR field. A value indicated by the first EHT PSR field is determined based on the first resource unit and the second resource unit. A value indicated by the second EHT PSR field is the same as a value indicated by a second EHT UL PSR field included in the trigger frame. It should be understood that the first unit 21 is configured to perform receiving and transmitting functions, and the first unit 21 may also be referred to as a transceiver unit.

[0304] Optionally, the processing unit 22 includes a generating subunit 221, which is configured to generate a TB PPDU.

[0305] Optionally, the processing unit 22 further includes a determining subunit 222. The determining subunit 222 is configured to determine a value indicated by a first EHT PSR field based on the first resource unit and the second resource unit.

[0306] It should be understood that the communication device 2 of the third design may correspondingly perform embodiment 4, and the aforementioned operations or functions of the units in the communication device 2 are configured to implement the corresponding operations of the first station of embodiment 4. For brevity, details will not be described again here.

[0307] The above describes the access point and station in the embodiment of the present application. The following describes the possible product forms of the access point and station. It should be understood that any product of any form having the function of the AP in FIG. 15 and any product of any form having the function of the station in FIG. 16 are within the protection scope of the embodiment of the present application. It should be further understood that the following description is merely an example, and the product forms of the AP and station in the embodiment of the present application are not limited thereto.

[0308] In a possible product form, the AP and the STA in the embodiments of the present application may be implemented using a common bus architecture.

[0309] For ease of explanation, Fig. 17 is a schematic diagram of the structure of a communication device 1000 according to one embodiment of the present application. The communication device 1000 may be an AP or a STA, or a chip in an AP or a STA. Fig. 17 shows only the main components of the communication device 1000. In addition to the processor 1001 and the communication interface 1002, the communication device may further include a memory 1003 and an input / output device (not shown).

[0310] The processor 1001 is primarily configured to process communication protocols and communication data, control communication devices, execute software programs, and process data of the software programs. The memory 1003 is primarily configured to store software programs and data. The communication interface 1002 may include a control circuit and an antenna. The control circuit is primarily configured to convert between baseband signals and radio frequency signals, and process the radio frequency signals. The antenna is primarily configured to receive and transmit radio frequency signals in the form of electromagnetic waves. The input / output device, such as a touch screen, a display, or a keyboard, is primarily configured to receive data entered by a user and output data to the user.

[0311] After the communication device is powered on, the processor 1001 can read the software program in the memory 1003, interpret and execute the instructions of the software program, and process data of the software program. When data needs to be transmitted wirelessly, the processor 1001 performs baseband processing on the data to be transmitted, and then outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal, and then transmits the radio frequency signal in the form of electromagnetic waves using an antenna. When data is transmitted to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1001. The processor 1001 converts the baseband signal into data and processes the data.

[0312] Optionally, the memory 1003 may be located within the processor 1001 .

[0313] In other embodiments, the radio frequency circuitry and antenna may be located independently from the processor performing the baseband processing, for example in a distributed scenario, the radio frequency circuitry and antenna may be located independently and remotely from the communication device.

[0314] The processor 1001, the communication interface 1002, and the memory 1003 may be connected via a communication bus.

[0315] In one design, the communication device 1000 may be configured to perform the functions of the first access point in embodiment 1. The processor 1001 may be configured to generate a trigger frame transmitted in step S101 of FIG. 9 and / or perform other processes of the techniques described herein. The communication interface 1002 may be configured to perform steps S101 and S104 of FIG. 9 and / or perform other processes of the techniques described herein.

[0316] In another design, the communication device 1000 may be configured to perform the functions of the station in embodiment 1, and the processor 1001 may be configured to generate the TB PPDU transmitted in step S103 of FIG. 9 and / or perform other processes of the techniques described herein. The communication interface 1002 may be configured to perform steps S102 and S103 of FIG. 9 and / or perform other processes of the techniques described herein.

[0317] In one design, the communication device 1000 may be configured to perform functions of the first access point in embodiment 2. The processor 1001 may be configured to generate a trigger frame transmitted in step S201 of FIG. 10 and / or perform other processes of the techniques described herein. The communication interface 1002 may be configured to perform steps S201 and S204 of FIG. 10 and / or perform other processes of the techniques described herein.

[0318] In another design, the communications device 1000 may be configured to perform the functions of the station in embodiment 2, and the processor 1001 may be configured to generate the TB PPDU transmitted in step S203 of FIG. 10 and / or perform other processes of the techniques described herein. The communications interface 1002 may be configured to perform steps S202 and S203 of FIG. 10 and / or perform other processes of the techniques described herein.

[0319] In one design, communication device 1000 may be configured to perform the functions of the second access point in embodiment 3. Processor 1001 may be configured to perform step S306 of FIG. 11B and generate a PSRT PPDU to be transmitted in step S307 of FIG. 11B, and / or perform other processes of the techniques described herein. Communication interface 1002 may be configured to perform steps S303 and S307 of FIG. 11A and FIG. 11B, and / or perform other processes of the techniques described herein.

[0320] In one design, communication device 1000 may be configured to perform functions of a first access point in embodiment 4. Processor 1001 may be configured to generate a PSRR PPDU to be transmitted in step S401 of FIG. 13 and / or perform other processes of the techniques described herein. Communication interface 1002 may be configured to perform steps S401 and S405 of FIG. 13 and / or perform other processes of the techniques described herein.

[0321] In another design, the communication device 1000 may be configured to perform the functions of the first station in embodiment 4, and the processor 1001 may be configured to generate the TB PPDU transmitted in step S404 of FIG. 13 and / or perform other processes of the techniques described herein. The communication interface 1002 may be configured to perform steps S402 and S404 of FIG. 13 and / or perform other processes of the techniques described herein.

[0322] In any one of the aforementioned designs, the processor 1001 may include a communication interface for performing receiving and transmitting functions. For example, the communication interface may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, the interface, or the interface circuit configured to perform the receiving function and the transmitting function may be separate or integrated. The transceiver circuit, the interface, or the interface circuit may be configured to read and write code / data. Alternatively, the transceiver circuit, the interface, or the interface circuit may be configured to transmit or forward a signal.

[0323] In any one of the above designs, the processor 1001 may store instructions. The instructions may be a computer program. The computer program may be run on the processor 1001 to enable the communication device 1000 to perform the method described in any one of the above embodiments. The computer program may be a program that is executed by the processor 1001 to execute the method described in any one of the above embodiments. 1001 In this case, the processor 1001 may be implemented by hardware.

[0324] In one embodiment, the communication device 1000 may include a circuit, which may perform the transmitting, receiving, or communicating functions in any one of the preceding embodiments. The processor and communication interface described in this application may be implemented in an integrated circuit (IC), an analog IC, a radio frequency integrated circuit (RFIC), a mixed signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), or an electronic device, etc. The processor and communication interface may be fabricated using various IC technologies, such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), P-channel metal oxide semiconductor (PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), and gallium arsenide (GaAs).

[0325] The scope of the communication device described in this application is not limited thereto, and the structure of the communication device may not be limited by FIG. 17. The communication device may be a separate device or may be part of a larger device. For example, the communication device may include: (1) An independent integrated circuit IC, chip, or chip system or subsystem; (2) a set including one or more ICs, optionally the set of ICs may further include a storage component configured to store data and computer programs; (3) ASICs such as modems (4) A module that can be incorporated into other devices; (5) A receiver, terminal, intelligent terminal, cellular telephone, wireless device, handheld device, mobile unit, vehicle-mounted device, network device, cloud device, or artificial intelligence device, etc., or (6)Other may be also possible.

[0326] In a possible product form, the AP and the STA in the embodiments of the present application may be implemented by a general-purpose processor.

[0327] A general-purpose processor for implementing the first access point includes a processing circuit and an input / output interface interconnected to and in communication with the processing circuit.

[0328] In one design, the general-purpose processor may be configured to perform the functions of the first access point in embodiment 1. In particular, the processing circuit is configured to generate the TB PPDU transmitted in step S103 of FIG. 9 and / or perform other processes of the techniques described herein. The input / output interface is configured to perform steps S102 and S103 of FIG. 9 and / or perform other processes of the techniques described herein.

[0329] In one design, the general-purpose processor may be configured to perform the functions of the first access point in embodiment 2. In particular, the processing circuit may be configured to generate the trigger frame transmitted in step S201 of FIG. 10 and / or other processes of the techniques described herein. The input / output interface may be configured to perform steps S201 and S204 of FIG. 10 and / or other processes of the techniques described herein.

[0330] In one design, the general-purpose processor may be configured to perform functions of the first access point in embodiment 4. In particular, the processing circuit may be configured to generate the PSRR PPDU transmitted in step S401 of FIG. 13 and / or other processes of the techniques described herein. The input / output interface may be configured to perform steps S401 and S405 of FIG. 13 and / or other processes of the techniques described herein.

[0331] A general-purpose processor for implementing the second access point includes a processing circuit and an input / output interface internally connected to and communicating with the processing circuit. The general-purpose processor may be configured to perform the functions of the second access point in embodiment 3. In particular, the processing circuit may be configured to perform step S306 of FIG. 11B and generate a PSRT PPDU to be transmitted in step S307 of FIG. 11B, and / or perform other processes of the techniques described herein. The input / output interface may be configured to perform steps S303 and S307 of FIG. 11A and FIG. 11B, and / or perform other processes of the techniques described herein.

[0332] A general purpose processor for implementing a station includes a processing circuit and an input / output interface interconnected to and in communication with the processing circuit.

[0333] In one design, the general-purpose processor may be configured to perform the functions of the station in embodiment 1. In particular, the processing circuitry is configured to generate the TB PPDU to be transmitted in step S103 of FIG. 9 and / or perform other processes of the techniques described herein. The input / output interface is configured to perform steps S102 and S103 of FIG. 9 and / or perform other processes of the techniques described herein.

[0334] In one design, the general-purpose processor may be configured to perform the functions of the station in embodiment 2. In particular, the processing circuit may be configured to generate the TB PPDU transmitted in step S203 of FIG. 10 and / or other processes of the techniques described herein. The input / output interface may be configured to perform steps S202 and S203 of FIG. 10 and / or other processes of the techniques described herein.

[0335] In one design, the general-purpose processor may be configured to perform the functions of the first station in embodiment 4. In particular, the processing circuit may be configured to generate the TB PPDU transmitted in step S404 of FIG. 13 and / or other processes of the techniques described herein. The input / output interface may be configured to perform steps S402 and S404 of FIG. 13 and / or other processes of the techniques described herein.

[0336] It should be understood that the communication devices in the above various product forms have any function of the AP or STA in any one of the above embodiments, and the details are not described again here.

[0337] An embodiment of the present application further provides a computer-readable storage medium, which stores computer program code, and when a processor executes the computer program code, the electronic device performs the method in any one of the preceding embodiments.

[0338] An embodiment of the present application further provides a computer program product, which, when running on a computer, enables the computer to perform the method in any one of the preceding embodiments.

[0339] An embodiment of the present application further provides a communication device. The device may be in the form of a chip product. The structure of the device includes a processor and an interface circuit. The processor is configured to communicate with other devices through the interface circuit to enable the device to perform the method in any one of the previous embodiments.

[0340] An embodiment of the present application further provides a wireless communication system, including an AP and a STA. The AP and the STA can perform the method in any one of the preceding embodiments.

[0341] The method or algorithm steps described in conjunction with the contents disclosed in this application may be implemented by hardware or by a processor by executing software instructions. The software instructions may include corresponding software modules. The software modules may be stored in a Random Access Memory (RAM), a flash memory, an Erasable Programmable Read Only Memory (EPROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a register, a hard disk, a removable hard disk, a Compact Disk Read Only Memory (CD-ROM), or any other form of storage medium known in the art. For example, the storage medium is coupled to the processor such that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium may alternatively be components of the processor. The processor and the storage medium may be disposed in an ASIC. In addition, the ASIC may be disposed in the core network interface device. Of course, the processor and the storage medium may exist as separate components in the core network interface device.

[0342] Those skilled in the art should recognize that the functions described in the present application in one or more of the foregoing examples may be implemented by hardware, software, firmware, or any combination thereof. When the functions are implemented by software, the functions may be stored on a computer-readable medium or transmitted as one or more instructions or codes in a computer-readable medium. Computer-readable media include computer-readable storage media and communication media. Communication media include any medium that facilitates the transmission of a computer program from one place to another. Storage media may be any available medium accessible to a general-purpose or special-purpose computer.

[0343] In the above specific embodiments, the objectives, technical solutions and beneficial effects of the present application are further described in detail. It should be understood that the above description is only a specific embodiment of the present application, and is not intended to limit the protection scope of the present application. Any modifications, equivalent replacements, or improvements made based on the technical solutions of the present application shall fall within the protection scope of the present application. [Explanation of symbols]

[0344] 1. Communications equipment 2. Communications equipment 11 Second Unit 12 Processing Unit 21 First Unit 22 Processing Unit 101 AP 102 AP 201STA 202 STA 203 STA 221 Generation Subunit 222 Decision Subunit 1000 Communication Equipment 1001 Processor 1002 Communication Interface 1003 Memory

Claims

1. 1. A method for determining a transmit power in a wireless local area network, comprising: receiving, by a station, a trigger frame, the trigger frame indicating a first resource unit allocated to the station, the trigger frame including an access point (AP) transmit power subfield and an uplink target received power subfield; transmitting, by the station, a trigger-based physical layer protocol data unit (TB PPDU) at a first transmit power, where second resource units occupied by the TB PPDU are all or a part of the first resource units; Including, the first transmit power is determined based on an indication of the AP transmit power subfield, an indication of the uplink target received power subfield, the second resource unit, and the first resource unit; method.

2. 2. The method of claim 1, wherein the first transmit power is determined based on a value indicated by the AP transmit power subfield, a value indicated by the uplink target received power subfield, a size of the second resource unit, and a size of the first resource unit.

3. The first transmission power is determined based on an indication of the AP transmission power subfield, an indication of the uplink target received power subfield, a second resource unit, and the first resource unit. the first transmit power is determined based on the indication of the AP transmit power subfield, the indication of the uplink target received power subfield, and a ratio of a size of the second resource unit to a size of the first resource unit.

2. The method of claim 1, comprising:

4. 3. The method of claim 2, wherein the size of the first resource unit is determined based on a total number of subcarriers included in the first resource unit, and the size of the second resource unit is determined based on a total number of subcarriers included in the second resource unit.

5. The first transmission power is [0010] and [0025] indicates the first transmission power, and TargetRx pwr is the value indicated by the uplink target received power subfield, and RU_SIZE allocated indicates the size of the first resource unit allocated to the station, and RU_SIZE new indicates the size of the second resource unit occupied by the TB PPDU, PL DL 2. The method of claim 1 , wherein: indicates a path loss from a first access point to the station, the path loss from the first access point to the station being determined based on the indication of the AP transmit power subfield and a received power of the station.

6. 3. The method of claim 2, wherein the size of the first resource unit is determined based on the number of first bandwidth sizes included in a bandwidth of the first resource unit, and the size of the second resource unit is determined based on the number of the first bandwidth sizes included in a bandwidth of the second resource unit.

7. 7. The method of claim 6, wherein the first bandwidth size is any one of the following: 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz.

8. The first transmission power is [0030] and [0045] indicates the first transmission power, and TargetRx pwr is the value indicated by the uplink target received power subfield, and RU_BW_Number allocated indicates the number of the first bandwidth size included in the bandwidth of the first resource unit, and RU_BW_Number new indicates the number of the first bandwidth size included in the bandwidth of the second resource unit, PL DL indicates a path loss from a first access point to the station, the path loss from the first access point to the station being determined based on the indication of the AP transmit power subfield and a received power of the station. The method of claim 6.

9. the bandwidth of the first resource unit is from a lowest frequency of the first resource unit to a highest frequency of the first resource unit, and the bandwidth of the second resource unit is from a lowest frequency of the second resource unit to a highest frequency of the second resource unit; or The bandwidth of the first resource unit is a sum of bandwidths occupied by one or more resource units included in the first resource unit, and the bandwidth of the second resource unit is a sum of bandwidths occupied by one or more resource units included in the second resource unit. The method of claim 6.

10. The trigger frame further includes instruction information, and the instruction information indicates a manner of determining the first transmission power; The manner of determining the first transmission power includes one or more of the following: a first determination manner, a second determination manner, and a third determination manner; The first determination method is to determine based on a value indicated by the AP transmission power subfield, a value indicated by the uplink target received power subfield, a total number of subcarriers included in the second resource unit, and a total number of subcarriers included in the first resource unit; The second determination manner is based on the value indicated by the AP transmission power subfield, the value indicated by the uplink target received power subfield, the number of first bandwidth sizes included in the bandwidth of the second resource unit, and the number of first bandwidth sizes included in the bandwidth of the first resource unit; The third determination manner is to determine based on the indication of the AP transmission power subfield and the indication of the uplink target received power subfield; The method of claim 1.

11. The method of claim 10 , wherein the indication information is located in a common information field or a user information field of the trigger frame.

12. 1. A method for determining a transmit power in a wireless local area network, comprising: transmitting, by a first access point, a trigger frame, the trigger frame indicating a first resource unit assigned to a station, the trigger frame including an access point (AP) transmit power subfield and an uplink target received power subfield; receiving, by the first access point, a trigger-based physical layer protocol data unit (TB PPDU), a power at which the TB PPDU is received is determined based on a first transmit power and a path loss from the first access point to the station, the first transmit power being determined based on an indication of the AP transmit power subfield, an indication of the uplink target receive power subfield, a second resource unit, and the first resource unit; A method comprising:

13. 13. The method of claim 12, wherein the first transmit power is determined based on a value indicated by the AP Transmit Power subfield, a value indicated by the Uplink Target Received Power subfield, a size of the second resource unit, and a size of the first resource unit.

14. The first transmission power is determined based on an indication of the AP transmission power subfield, an indication of the uplink target received power subfield, a second resource unit, and the first resource unit. the first transmit power is determined based on the indication of the AP transmit power subfield, the indication of the uplink target received power subfield, and a ratio of a size of the second resource unit to a size of the first resource unit.

13. The method of claim 12, comprising:

15. 14. The method of claim 13, wherein the size of the first resource unit is determined based on a total number of subcarriers included in the first resource unit, and the size of the second resource unit is determined based on a total number of subcarriers included in the second resource unit.

16. The first transmission power is [0050] and [006] indicates the first transmit power, TargetRxpwr is the value indicated by the uplink target received power subfield, RU_SIZEallocated indicates the size of the first resource unit allocated to the station, and RU_SIZEnew indicates the size of the second resource unit occupied by the TB PPDU; 13. The method of claim 12, wherein a PLDL indicates the path loss from the first access point to the station, the path loss from the first access point to the station being determined based on the indication of the AP transmit power subfield and a received power of the station.

17. 14. The method of claim 13, wherein the size of the first resource unit is determined based on the number of first bandwidth sizes included in a bandwidth of the first resource unit, and the size of the second resource unit is determined based on the number of the first bandwidth sizes included in a bandwidth of the second resource unit.

18. 20. The method of claim 17, wherein the first bandwidth size is any one of the following: 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz.

19. The first transmission power is [0070] and [0080] indicates the first transmission power, TargetRxpwr is the value indicated by the uplink target received power subfield, RU_BW_Numberallocated indicates the number of the first bandwidth size included in the bandwidth of the first resource unit, and RU_BW_Numbernew indicates the number of the first bandwidth size included in the bandwidth of the second resource unit; a PLDL indicating the path loss from the first access point to the station, the path loss from the first access point to the station being determined based on the indication of the AP transmit power subfield and a received power of the station. The method of claim 17.

20. the bandwidth of the first resource unit is from a lowest frequency of the first resource unit to a highest frequency of the first resource unit, and the bandwidth of the second resource unit is from a lowest frequency of the second resource unit to a highest frequency of the second resource unit; or The bandwidth of the first resource unit is a sum of bandwidths occupied by one or more resource units included in the first resource unit, and the bandwidth of the second resource unit is a sum of bandwidths occupied by one or more resource units included in the second resource unit. The method of claim 17.

21. The trigger frame further includes instruction information, and the instruction information indicates a manner of determining the first transmission power; The manner of determining the first transmission power includes one or more of the following: a first determination manner, a second determination manner, and a third determination manner; The first determination method is to determine based on a value indicated by the AP transmission power subfield, a value indicated by the uplink target received power subfield, a total number of subcarriers included in the second resource unit, and a total number of subcarriers included in the first resource unit; The second determination manner is based on the value indicated by the AP transmission power subfield, the value indicated by the uplink target received power subfield, the number of first bandwidth sizes included in the bandwidth of the second resource unit, and the number of first bandwidth sizes included in the bandwidth of the first resource unit; The third determination manner is to determine based on the indication of the AP transmission power subfield and the indication of the uplink target received power subfield; The method of claim 12.

22. The method of claim 21 , wherein the indication information is located in a common information field or a user information field of the trigger frame.

23. A communication device comprising a processor and a communication interface, the communication device being configured to perform a method according to any one of claims 1 to 11.

24. A communications device comprising a processor and a communications interface, the communications device configured to perform a method according to any one of claims 12 to 22.

25. 12. A computer readable storage medium having stored thereon program instructions which, when executed, perform a method according to any one of claims 1 to 11.

26. 23. A computer readable storage medium having stored thereon program instructions which, when executed, perform the method of any one of claims 12 to 22.

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