CN115529659B - Method and device for triggering transmission power control report, access point and station - Google Patents

Abstract

The embodiment of the application discloses a method and a device for triggering a transmission power control report, an access point and a station; the method comprises the following steps: the access point sends a trigger frame, wherein the trigger frame is used for triggering M stations to feed back a transmission power control report at the same time, and the value of M is an integer greater than or equal to 1; the station acquires the trigger frame. Since at least one (M) stations can be triggered by one trigger frame to feed back the transmission power control report at the same time, each station does not need to feed back one transmission power control report one by one, thereby being beneficial to reducing the resource overhead and improving the information transmission efficiency.

Description

Transmit power control report triggering method and device, access point and station

Technical Field

The present application relates to the field of communication technology, and in particular to a method and device for triggering a transmission power control report, an access point, and a station.

Background Art

The IEEE 802.11 series of protocol standards for wireless local access networks (WLANs) developed by the Institute of Electrical and Electronic Engineers (IEEE) have involved related transmit power control (TPC) mechanisms.

If an access point station (AP STA, also referred to as AP or access point) sends a TPC request frame to a non-access point station (non-AP STA, also referred to as STA or station), the TPC request frame may request the station to report information such as link margin, and the station may feed back a TPC report frame to the access point, so that the access point may learn information such as the link margin of the station through the TPC report frame, so that the access point may control its own transmission power, adjust the transmission resource bandwidth, or select a modulation and coding scheme (MCS) through the information such as the link margin.

At present, the IEEE 802.11ax protocol standard supports multi-user operations of DL (downlink) and UL (uplink), that is, through DL OFDMA (orthogonal frequency division multiple access), UL OFDMA, DL MU-MIMO (multi-user multiple-input multiple-output) and UL MU-MIMO, the access point and multiple sites can simultaneously perform data transmission. When data transmission is initially started or after a period of no data transmission, the access point needs to obtain information such as the link margin of multiple sites. However, the process for the access point to obtain this information can only be to send a TPC request frame to each of the multiple sites, and then the multiple sites will feedback a TPC report frame one by one, resulting in problems such as large resource overhead and low information transmission efficiency.

Summary of the invention

The embodiments of the present application provide a method and device for triggering a sending power control report, an access point, and a station, so as to enable at least one station to simultaneously feedback a sending power control report through a trigger frame, thereby helping to reduce resource overhead and improve information transmission efficiency.

In a first aspect, an embodiment of the present application provides a method for triggering a transmission power control report, including:

The access point sends a trigger frame, where the trigger frame is used to trigger M stations to simultaneously feed back a transmission power control report, where the value of M is an integer greater than or equal to 1.

In a second aspect, an embodiment of the present application provides a method for triggering a transmission power control report, including:

The station obtains a trigger frame, where the trigger frame is used to trigger M stations to simultaneously feed back a transmission power control report, where the value of M is an integer greater than or equal to 1.

In a third aspect, an embodiment of the present application provides a sending power control report triggering device, the device comprising a processing unit and a communication unit, the processing unit being configured to:

A trigger frame is sent through the communication unit, where the trigger frame is used to trigger M sites to simultaneously feed back a transmission power control report, where the value of M is an integer greater than or equal to 1.

In a fourth aspect, an embodiment of the present application provides a sending power control report triggering device, the device comprising a processing unit and a communication unit, the processing unit being configured to:

A trigger frame is received through the communication unit, where the trigger frame is used to trigger M sites to simultaneously feed back a transmission power control report, where the value of M is an integer greater than or equal to 1.

In a fifth aspect, an embodiment of the present application provides an access point, comprising a processor, a memory, a communication interface, and one or more programs, wherein the at least one program is stored in the memory and is configured to be executed by the processor, and the at least one program includes instructions for executing the steps in the first aspect of the embodiment of the present application.

In a sixth aspect, an embodiment of the present application provides a site, comprising a processor, a memory, a communication interface, and at least one program, wherein the at least one program is stored in the memory and is configured to be executed by the processor, and the at least one program includes instructions for executing the steps in the second aspect of the embodiment of the present application.

In the seventh aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program and data for electronic data exchange, wherein the computer program and data enable a computer to execute part or all of the steps described in the first aspect or the second aspect of the embodiment of the present application.

In an eighth aspect, an embodiment of the present application provides a computer program, wherein the computer program is operable to cause a computer to execute some or all of the steps described in the first aspect or the second aspect of the embodiment of the present application. The computer program may be a software installation package.

It can be seen that the access point sends a trigger frame, which is used to trigger M stations to feed back a transmit power control report at the same time, where the value of M is an integer greater than or equal to 1; the station obtains the trigger frame. Since one trigger frame can trigger at least one (M) station to feed back a transmit power control report at the same time, without each station feeding back a transmit power control report one by one, it is beneficial to reduce resource overhead and improve information transmission efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

FIG1 is a schematic diagram of the architecture of a wireless communication system provided in an embodiment of the present application;

FIG2 is a schematic diagram of a frame structure of a trigger frame provided in an embodiment of the present application;

3 is a schematic diagram of a frame structure of a common information field in a trigger frame provided by an embodiment of the present application;

4 is a schematic diagram of a frame structure of a user information field in a trigger frame provided by an embodiment of the present application;

FIG5 is a schematic diagram of each station feeding back a TPC report frame one by one according to an embodiment of the present application;

FIG6 is a schematic diagram of a flow chart of a method for triggering a transmission power control report according to an embodiment of the present application;

7 is a schematic diagram of a trigger frame triggering multiple stations to simultaneously feed back TPC reports provided in an embodiment of the present application;

8 is a block diagram of functional units of a transmission power control report triggering device provided in an embodiment of the present application;

9 is a block diagram of functional units of another apparatus for triggering a transmission power control report provided in an embodiment of the present application;

FIG10 is a schematic diagram of the structure of an access point provided in an embodiment of the present application;

FIG. 11 is a schematic diagram of the structure of a site provided in an embodiment of the present application.

DETAILED DESCRIPTION

In order to better understand the technical solution of the present application by those skilled in the art, the technical solution in the embodiments of the present application is described below in conjunction with the drawings in the embodiments of the present application. It is obvious that the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. With respect to the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, software, product, or device that includes a series of steps or units is not limited to the listed steps or units, but also includes steps or units that are not listed, or also includes other steps or units inherent to these processes, methods, products, or devices.

Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

It should be noted that the "connection" in the embodiments of the present application refers to various connection methods such as direct connection or indirect connection to achieve communication between devices, and no limitation is made to this. The "network" and "system" in the embodiments of the present application express the same concept, and the communication system is the communication network.

The embodiments of the present application can be applied to a wireless local area network (WLAN). At present, the protocol standard adopted by WLAN is the IEEE 802.11 series. Among them, WLAN may include multiple basic service sets (BSS), and the devices in the basic service set may include access point stations (AP STA, also referred to as AP or access point) and non-access point stations (none access point station, non-AP STA, also referred to as STA or station). In addition, each basic service set may include an access point and at least one station.

Specifically, an access point may be an entity that provides network access to sites connected thereto via a wireless medium. An access point may connect various wireless network clients to an Ethernet network. An access point may be a network device with a wireless fidelity (Wi-Fi) chip. An access point may be a device that supports various IEEE 802.11 protocol standards. For example, an access point may support devices such as IEEE 802.11ac, IEEE 802.11n, IEEE 802.11g, IEEE 802.11b, IEEE802.11ax, IEEE802.11be, and next-generation WLAN protocol standards. An access point may include a centralized controller, a base station (BS), a base transceiver station (BTS), a site controller, and a switch.

Furthermore, the access point may include a device that provides wireless communication functions for the station, such as a chip system, wherein the chip system may include a chip and may also include other discrete devices, such as a transceiver device.

Furthermore, the access point can communicate with an Internet Protocol (IP) network, such as the Internet, a private IP network, or other data networks.

Specifically, the station can be a wireless communication chip, a wireless sensor or a wireless communication terminal. For example, a user equipment (UE) supporting Wi-Fi communication function, a remote/remote terminal (remote UE), an access terminal, a user unit, a user station, a mobile device, a user terminal, an intelligent terminal, a wireless communication device, a user agent or a user device/cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device, a vehicle-mounted device, a wearable device, etc., which are not specifically limited.

Furthermore, the station may include non-AP EHT STA (none AP extremely high throughput station) and non-AP HE STA (none AP high efficiency station).

Furthermore, the site may include a device with transceiver functions, such as a chip system, wherein the chip system may include a chip and may also include other discrete devices, such as a transceiver device.

In combination with the above description, the following embodiment of the present application provides an exemplary description of a wireless communication system of access points and stations in a basic service set.

For example, the wireless communication system of the embodiment of the present application is shown in FIG1 . The wireless communication system 10 may include an access point 110, a site 120, and a site 130. The access point 110 may provide communication coverage for a specific geographic area, and may communicate with the site 120 and the site 130 within the communication coverage.

Optionally, the wireless communication system 10 may further include multiple access points, and the communication coverage of each access point may include a certain number of sites, which is not specifically limited.

Optionally, the wireless communication system 10 may also include other network entities such as access network (radio access network, RAN) equipment, core network (core network, CN) equipment, network controller, mobility management entity, etc., which are not specifically limited.

Optionally, the communication between the access point and the station in the wireless communication system 10 may be wireless communication or wired communication, which is not specifically limited.

The following is an introduction to the relevant contents involved in the technical solution of this application.

1. Trigger Frame (TF)

The trigger frame belongs to the Media Access Control (MAC) frame. As shown in FIG2 , the frame structure (Frame Format) of the trigger frame may include a frame control (FC) field (field, or domain), a duration (Duration) field, a receiver address (RA) field, a transmitter address (TA) field, a common information (Common Information, Common Info) field, at least one user information (User Information, User Info) field, a padding (Padding) field, and a frame check sequence (FCS) field.

It should be noted that different IEEE 802.11 protocol standards may have different specifications for the fields carried by the trigger frame.

The RA field may indicate the receiver address of the trigger frame. When the trigger frame needs to trigger a station to transmit data, the RA field may indicate the MAC address of the station. When the trigger frame needs to trigger at least one station to transmit data, the RA field may indicate the broadcast address.

The TA field may indicate the transmitter address of the trigger frame. When the access point sending the trigger frame does not use multiple BSSIDs, the TA field may indicate the MAC address of the access point.

The common information field may indicate information that needs to be read by at least one station triggered by the trigger frame.

The user information field may respectively indicate information required for each of the multiple stations triggered by the trigger frame to send a response to the trigger frame. Specifically, the trigger frame may include at least one user information field.

The user information field may indicate a site triggered by a trigger frame. That is, the user information field has a corresponding relationship with the site. When the user information field includes association identifier (AID) information, the site indicated by the AID information may be a site triggered by a trigger frame or a site corresponding to the user information field. For example, the AID12 subfield in the user information field may indicate the 12 least significant bits (LSB) of the AID of the site triggered by the trigger frame.

The user information field may indicate a resource unit (RU) allocated to a site triggered by a trigger frame. The RU may indicate a number of subcarriers used for uplink and downlink transmissions. In addition, the RU allocation subfield in the user information field may indicate a starting RU of one or more consecutive RUs allocated by the user information field.

The padding field may include padding bits. Among them, the padding field may be used to ensure that the station sending the response frame to the trigger frame is ready for the response frame transmission time. Therefore, the length of the padding field may be determined according to the capability of the station sending the response frame to the trigger frame. In addition, the trigger frame may not include the padding field.

The access point can use the trigger frame to trigger the station to perform data transmission, such as uplink data transmission and peer-to-peer (P2P) link data transmission. Uplink data transmission can be understood as the station transmitting data to the access point; P2P link data transmission can be understood as a station transmitting data to another station on the P2P link.

2. Type of trigger frame

The trigger type subfield in the common information field of the trigger frame may indicate the type of the trigger frame. For example, in Table 1, if the value of the trigger type subfield is set to 1, the type of the trigger frame is BFRP, that is, the trigger frame is a BFRP trigger frame; if the value of the trigger type subfield is set to 4, the type of the trigger frame is BSRP, that is, the trigger frame is a BSRP trigger frame.

3. Frame structure of the common information field in the trigger frame

As shown in Figure 3, the frame structure of the common information field in the trigger frame includes: a trigger type (Trigger Type) subfield, an uplink length (UL Length) subfield, a More TF subfield, a carrier sense (CS Required) subfield, an uplink bandwidth (UL BW) subfield, a guard interval + long training sequence type (GI And LTF Type) subfield, a MU-MIMO high efficiency LTF mode (MU-MIMO HE-LTF Mode) subfield, a HE-LTF symbol number and a midamble period (Number of HE-LTF Symbols and Midamble Periodicity) subfield, an uplink STBC (UL STBC) subfield, an LDPC extra symbol part (LDPC Extra Symbol Segment) subfield, an AP transmit power (AP Tx Power) subfield, a packet extension ambiguity (PE Disambiguity) subfield, an uplink spatial multiplexing (UL Spatial Reuse) subfield, a Doppler (Doppler) subfield, an uplink HE-SIG-A (UL HE-SIG-A) subfield, reserved subfield, common information related to the trigger frame type (Trigger Dependent Common Info) subfield, etc.

Table 1

4. Frame structure of the user information field in the trigger frame

As shown in Figure 4, the frame structure of the user information field in the trigger frame includes: association identifier 12 (AID12) subfield, resource unit allocation (RU Allocation) subfield, uplink forward error correction code coding type (UL FEC CodingType) subfield, uplink high efficiency modulation and coding strategy (UL HE-MCS) subfield, uplink DCM subfield, SS allocation/RA-RU information (SS Allocation/RA-RU Information) subfield, uplink target receive power (UL TargetReceive Power) subfield, reserved (Reserved) subfield, common information related to the trigger frame type (TriggerDependent User Info) subfield, etc.

5. Link margin, transmit power information and power headroom

Link margin: It can be defined as the ratio of the received power of the signal received by the receiver to the minimum received power required by the receiver.

Transmit power information: can be defined as the transmit power of the signal sent by the receiver/sender.

Power headroom: can be defined as the difference in decibels (dB) between the transmit power capability of a sender and the transmit power of a signal sent by the sender.

In WLAN wireless communication, both the sender and the receiver need to know the other party's (receive) link margin/transmit power information/(transmit) power margin, so that they can use the link margin/transmit power information/(transmit) power margin to control their own transmit power, adjust the wireless resource bandwidth, or select the modulation and coding scheme (MCS).

(1) The sender can control its own transmission power, adjust the wireless resource bandwidth or select MCS according to the link margin of the receiver. When the link margin is positive and large, the sender can reduce its own transmission power, increase the wireless resource bandwidth or select a higher-order MCS;

(2) If the access point needs to schedule downlink transmission to the site, the access point can control its own transmission power, allocate a more reasonable downlink wireless resource bandwidth, or select a more reasonable MCS based on the link margin of the site. When the link margin is positively biased, the access point can reduce its own transmission power, allocate a larger downlink wireless resource bandwidth, or use a higher-order MCS;

(3) If the access point needs to schedule uplink transmission to the site, the access point can allocate a more reasonable uplink wireless resource bandwidth or select a more reasonable MCS based on the link margin of the site and the transmit power information of the site. The access point can determine the path loss based on the transmit power information of the site and the received power of the access point received signal, thereby allocating a more reasonable uplink wireless resource bandwidth or selecting a more reasonable MCS based on the path loss.

In addition, the initial method of obtaining the link margin may be through a link measurement request frame/link measurement report frame, a TPC request frame/TPC report frame; the initial method of obtaining the transmit power information may be through a TPC request frame/TPC report frame. During the transmission, the link margin or transmit power information may be continuously updated through the MAC header.

6. Transmit power adaptation

A station may dynamically adjust the transmit power used to transmit a media access control protocol data unit (MAC protocol data unit, MPDU) to another station by estimating the path loss and link margin.

The access point can dynamically adjust the transmit power used to transmit data to the station by estimating the path loss and link margin.

The access point may use a TPC request frame to request the station to feedback (respond) a TPC report frame, which carries link margin and transmit power information. The transmit power field of the TPC report frame is used to indicate the transmit power information, and the link margin field of the TPC report frame is used to indicate the estimated link margin.

At present, the IEEE 802.11ax protocol standard supports multi-user operation of DL and UL, that is, through DL OFDMA, ULOFDMA, DL MU-MIMO and UL MU-MIMO, the access point can perform data transmission with multiple stations at the same time. When data transmission starts for the first time or after a period of no data transmission, the access point needs to obtain information such as link margins of multiple stations. However, the process of the access point obtaining this information can only send a TPC request frame to each of the multiple stations, and then the multiple stations will feedback a TPC report frame one by one, which leads to problems such as large resource overhead and low information transmission efficiency.

For example, as shown in FIG5 , the access point 501 first sends a TPC request frame 511 to the station 502, and the station 502 then feeds back a TPC report frame 513. Then, the access point 501 sends a TPC request frame 521 to the station 503, and the station 503 then feeds back a TPC report frame 523. Since the access point 501 needs to send TPC request frames to the stations 502 and 503 one by one, it results in large resource overhead and low information transmission efficiency.

In combination with the above description, an embodiment of the present application provides a flow chart of a method for triggering a transmission power control report, refer to FIG6 , the method comprising:

S610: The access point sends a trigger frame, where the trigger frame is used to trigger M stations to simultaneously feed back a transmission power control report, where the value of M is an integer greater than or equal to 1.

The simultaneous feedback (or simultaneous transmission) may be used to indicate that some or all of the M sites feed back the transmission power control report on the same time domain resource, where the time domain resource is indicated by a trigger frame.

It should be noted that the time domain resource for some or all of the M sites to feed back (or send) TPC reports is indicated by a trigger frame, wherein the trigger frame may indicate the same time domain resource, thereby enabling the M sites to feed back (or send) TPC reports simultaneously.

S620: The station obtains the trigger frame.

It should be noted that the IEEE 802.11ax protocol standard supports multi-user operation of DL and UL, that is, through DL OFDMA, UL OFDMA, DL MU-MIMO and UL MU-MIMO, the access point (AP) and multiple stations (STA) can simultaneously transmit data. In the process where the access point needs to obtain information such as link margins of multiple stations, since the access point can only send a TPC request frame to each of the multiple stations, and then each of the multiple stations feeds back a TPC report frame, it leads to problems such as large resource overhead and low information transmission efficiency.

Based on this, compared to the access point sending a TPC request frame to each station one by one, the access point of the present application can send a trigger frame, which can be used to trigger M (M≥1) stations to simultaneously feedback a transmission power control report (TPCreport), thereby enabling at least one station to simultaneously feedback a transmission power control report through one trigger frame, which is beneficial to reduce resource overhead and improve information transmission efficiency.

Exemplarily, as shown in FIG7 , access point 701 sends a trigger frame 711, and trigger frame 711 is used to trigger station 702 and station 703 to simultaneously feed back TPC report frames. Then, station 702 obtains trigger frame 711, and feeds back TPC report frame 712 on the uplink resources allocated by trigger frame 711. At the same time, station 703 obtains trigger frame 711, and feeds back TPC report frame 713 on the uplink resources allocated by trigger frame 711. After access point 701 obtains TPC report frame 712 and TPC report frame 713, access point 701 feeds back block acknowledgment (BA) frame to station 702 and station 703. Finally, access point 701 sends a trigger frame 721, which is used to trigger stations 702 and 703 to transmit uplink data, so that station 702 transmits uplink data 722 on the uplink resources allocated by trigger frame 721, and station 703 transmits uplink data 723 on the uplink resources allocated by trigger frame 721.

In combination with the above description, specific explanations are given below.

Specifically, the transmit power control report may carry at least one of the following: link margin information, transmit power information, and power margin information; wherein the link margin information is used to indicate the ratio of the receiving power of the trigger frame received by the first site to the minimum receiving power required by the first site; the transmit power information is used to indicate the transmit power of the transmit power control report fed back by the first site; the power margin information is used to indicate the decibel difference between the transmit power capability of the first site and the transmit power of the transmit power control report fed back by the first site; the first site is at least one of the M sites.

It should be noted that, in the WLAN wireless communication of the present application, if the access point needs to know the link margin information of at least one site (i.e., the first site) among the M sites, the access point can send a trigger frame to the first site, and the trigger frame can trigger the first site to simultaneously feedback a TPC report carrying the link margin information, so that the access point can obtain the link margin information through the TPC report, and then perform its own transmission power control, wireless resource bandwidth adjustment, or modulation and coding scheme (MCS) selection through the link margin information. Among them, if the link margin information is positively biased, it means that the receiving power of the first site receiving the trigger frame is positively biased than the minimum receiving power required by the first site, so the access point can reduce its own transmission power, increase the wireless resource bandwidth, or select a higher-order MCS.

Similarly, in the WLAN wireless communication of the present application, if the access point needs to know the transmission power information of at least one site (i.e., the first site) among the M sites, the access point can send a trigger frame to the first site, and the trigger frame can trigger the first site to simultaneously feedback a TPC report carrying the transmission power information, so that the access point can obtain the transmission power information through the TPC report. Then, the access point can determine the path loss information through the transmission power information and the receiving power of the TPC report received by itself, that is, the path loss information is used to represent the (decibel) difference between the transmission power information of the TPC report fed back by the first site and the receiving power of the TPC report received by the access point, so that the access point can allocate a more reasonable uplink wireless resource bandwidth to the first site or select a more reasonable MCS through the path loss information.

In addition, each of the M sites has a certain transmit power capability. The access point can obtain the transmit power capability of the site in the process of establishing an initial connection with the site (such as the association process). Therefore, in the WLAN wireless communication of the present application, if the access point needs to know the power headroom information of at least one site (i.e., the first site) among the M sites, the access point can send a trigger frame to the first site, and the trigger frame can trigger the first site to simultaneously feedback a TPC report carrying the power headroom information, so that the access point can obtain the power headroom information through the TPC report.

Specifically, if the transmission power capability of the first site is affected, the transmission power control report carries the power headroom information.

Among them, the transmission power capacity of the first site is affected, including at least one of the following: the equipment belonging to the first site is overheated, causing the transmission power capacity of the first site to be affected; the wireless communication modules of the equipment belonging to the first site other than the first site share (power sharing) the transmission power capacity, causing the transmission power capacity of the first site to be affected.

It should be noted that when the transmission power capability of at least one site among the M sites (i.e., the first site) is affected (or changed), the TPC report fed back by the first site to the access point may carry power headroom information, so that the access point can determine whether the transmission power capability of the first site is affected (or changed) through the power headroom information and the transmission power information, and support scenarios where certain factors affect the transmission power capability of the first site.

In addition, in an access point multi-link device (AP Multi-Link Device, AP MLD) or a non-access point multi-link device (non-AP MLD), a multi-link device (MLD) may include (integrate) at least one access point, at least one station, at least one wireless communication module, etc. Among them, the wireless communication module may include at least one of the following: a mobile communication (such as 2G/3G/4G/5G mobile communication) module, a wireless local area network (wireless local area network, WLAN) communication module, a Bluetooth (Bluetooth) communication module, a wireless fidelity (wireless fidelity, Wi-Fi) communication module, a Zigbee (Zigbee) communication module, a near field communication (near field communication, NFC) communication module, an ultrawide band (ultrawide band, UWB) communication module, and a visible light (light fidelity, Li-Fi) communication module.

Based on this, the device to which the first site of the present application belongs can be understood as a multi-link device. Among them, the multi-link device may include (integrate) the first site and other wireless communication modules except the first site. If the device to which the first site belongs overheats, the transmission power capacity of the first site may be affected; or, if the wireless communication modules of the device to which the first site belongs except the first site share the transmission power capacity, the transmission power capacity of the first site may be affected.

It can be seen that the present application analyzes the factors affecting the transmit power capability of the first site, so as to support the scenario where certain factors affect the transmit power capability of the first site. At the same time, the access point can learn whether the transmit power capability of the site is affected (or changed) by carrying power headroom information in the TPC report, so as to make corresponding adjustments to improve the robustness and stability of the system.

Specifically, the trigger frame may include at least one of the following: a common information field and at least one user information field; wherein the common information field may include information for triggering M sites to simultaneously feed back a send power control report; or, the user information field may include information for triggering M sites to simultaneously feed back a send power control report; or, a common information subfield associated with the trigger frame type in the common information field may include information for triggering M sites to simultaneously feed back a send power control report; or, a user information subfield associated with the trigger frame type in the user information field may include information for triggering M sites to simultaneously feed back a send power control report.

It should be noted that, in conjunction with Figure 2, the frame structure of the trigger frame may include a common information field and at least one user information field. In order to ensure the consistency between the frame structures of the trigger frames specified by various WLAN protocol standards and to trigger M sites to simultaneously feedback TPC reports, the present application needs to modify the frame structure of the trigger frame.

In order to trigger M sites to simultaneously feed back TPC reports, while ensuring that the frame structure of the modified trigger frame is compatible or consistent with the frame structure of other trigger frames (trigger frames of the same type or different types specified by different protocol versions), the modified trigger frame needs to include (carry or bear) information for triggering M sites to simultaneously feed back TPC reports, and the information can be included (carried or carried) by one of the common information field, the user information field, the common information subfield related to the trigger frame type (triggerdependent common info subfield), the user information subfield related to the trigger frame type (triggerdependent user info subfield), the reserved subfield in the common information field, and the reserved subfield in the user information field, so that at least one site can simultaneously feed back a transmit power control report through a trigger frame containing the information, which is beneficial to reducing resource overhead and improving information transmission efficiency.

Specifically, the user information field has a corresponding relationship with a site in the M sites, and the corresponding relationship is indicated by the association identifier information in the user information field.

The association identifier information may be an association identifier 12 (AID12) subfield (B0-B11).

It should be noted that, in conjunction with FIG. 4 , the AID12 subfield in the user information field of the trigger frame of the present application can indicate the site corresponding to the AID12 subfield. For example, as shown in FIG. 2 , the trigger frame carries M user information fields, and the M user information fields have a certain arrangement order in the frame structure of the trigger frame, and the AID12 subfield of each user information field in the M user information fields indicates a site, that is, the M user information fields correspond one to one with the M sites, so that the sites (i.e., M sites) that need to simultaneously feed back TPC reports are triggered by the trigger frame.

Specifically, some or all of the M sites feed back a transmission power control report on different resources, where the resources include resource units in the frequency domain or spatial streams in the spatial domain, and the resources are indicated by a trigger frame.

It should be noted that the M sites triggered by the trigger frame of the present application can feedback TPC reports in the same time domain resource and resource units (RU) in different frequency domains/spatial streams in the spatial domain. It can be seen that the transmission of TPC reports is achieved by indicating resource units or spatial streams through trigger frames.

Specifically, the trigger frame may be one of the following: a cache status report polling trigger frame, a beamforming report polling trigger frame, or a newly defined trigger frame.

If the trigger frame is a newly defined trigger frame, the value of the trigger type subfield in the common information field of the trigger frame is set to any value from 8 to 15.

If the trigger frame is a buffer status report polling trigger frame, the trigger frame is also used to trigger M stations to feed back a buffer status report (buffer status report) simultaneously.

If the trigger frame is a beamforming report polling trigger frame, the trigger frame is also used to trigger M stations to feed back beamforming reports (beamforming report) at the same time.

It should be noted that, in combination with the above Table 1, the trigger type subfield (trigger type subfield) in the common information field of the trigger frame can indicate the type of the trigger frame. If the value of the trigger type subfield is set to 1, the trigger frame is a beamforming report polling (BFRP) trigger frame; if the value of the trigger type subfield is set to 4, the trigger frame is a buffer status report polling (BSRP) trigger frame; if the value of the trigger type subfield is set to any value from 8 to 15, the trigger frame is a trigger frame newly defined in this application.

It can be seen that the present application realizes at least one site to simultaneously feedback a transmission power control report through a cache status report polling trigger frame, a beamforming report polling trigger frame or a newly defined trigger frame, thereby helping to reduce resource overhead and improve information transmission efficiency.

In addition, the newly defined trigger frame of the present application can be defined as a multi-user transmit power control request (MU-TPC request) frame, and the MU-TPC request frame can be used to trigger at least one station to simultaneously feedback a TPC report. In other words, as long as the frame has the function of triggering at least one station to simultaneously feedback a TPC report, the frame can be the trigger frame of the present application, and there is no specific limitation on this.

Secondly, the BSRP trigger frame can be used to collect the amount of data to be sent in the buffer of the site for subsequent uplink transmission scheduling. Therefore, the present application needs to modify the BSRP trigger frame so that the modified BSRP trigger frame can be used to trigger M sites to simultaneously feedback TPC reports and cache status reports. Among them, the TPC report carries at least one of the following: link margin information, transmission power information, power margin information, and the cache status report carries information on the amount of data to be sent in the buffer of at least one of the M sites.

For example, in conjunction with FIG3, it can be seen that the modified BSRP trigger frame can instruct the M sites triggered by it to feed back the buffer status report and the TPC report on the allocated uplink resources through the reserved subfield (such as B63) in the common information field. Among them, the buffer status report can be carried by a data frame, and the TPC report can be carried by an action frame, and the two can be aggregated into a media access control protocol data unit (aggregation-MACprotocol data unit, A-MPDU) frame.

Finally, the BFRP trigger frame can be used to collect the precoding information required for beam transmission to the site for subsequent use in DL MU-MIMO (downlink multi-user - multiple input multiple output) transmission. Therefore, the present application needs to modify the BFRP trigger frame so that the modified BFRP trigger frame can be used to trigger M sites to simultaneously feedback TPC reports and beamforming reports. Among them, the TPC report carries at least one of the following: link margin information, transmit power information, power margin information, and the beamforming report carries information on the precoding information required for beam transmission to at least one of the M sites.

For example, in combination with FIG. 3 , it can be seen that the modified BFRP trigger frame can instruct the M sites triggered by it to feed back TPC reports while feeding back beamforming reports on the allocated uplink resources through a reserved subfield (such as B63) in the common information field.

Optionally, if the trigger frame is a buffer status report polling trigger frame, the feedback transmit power control report is carried by an action frame, and the feedback buffer status report is carried by a data frame; wherein the action frame and the data frame are aggregated in an A-MPDU frame.

It should be noted that the action frame is a type of management frame, and the present application can carry the TPC report through the action frame. At the same time, the system throughput is improved by aggregating the action frame and the data frame in the A-MPDU.

The above mainly introduces the scheme of the embodiment of the present application from the perspective of the method side. It is understandable that in order to realize the above functions, the access point or station includes a hardware structure and/or software module corresponding to each function. Those skilled in the art should know that, in combination with the methods, modules, units or algorithm steps of each example described in the embodiments disclosed in this document, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a method, function, module, unit or step is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described methods, functions, modules, units or steps for each specific application, but such implementation should not be considered to exceed the scope of the present application.

The embodiment of the present application can divide the access point or site into functional units/modules according to the above method example. For example, each functional unit/module can be divided according to each function, or two or more functions can be integrated into one functional unit/module. The above integrated functional unit/module can be implemented in hardware or in software program. It should be noted that the division of functional units/modules in the embodiment of the present application is schematic, which is only a logical functional division, and there may be other division methods in actual implementation.

In the case of using an integrated unit/module, FIG8 provides a block diagram of the functional unit composition of a sending power control report triggering device. The sending power control report triggering device 800 includes: a processing unit 802 and a communication unit 803. The processing unit 802 is used to control and manage the actions of the access point. For example, the processing unit 802 is used to support the access point to execute the steps in FIG6 and other processes of the technical solution described in the present application. The communication unit 803 is used to support communication between the access point and other devices in the wireless communication system. The sending power control report triggering device 800 may also include a storage unit 801 for sending the program code executed by the sending power control report triggering device 800 and the data transmitted.

It should be noted that the sending power control report triggering device 800 may be a chip or a chip module.

Among them, the processing unit 802 can be a processor or a controller, for example, a central processing unit (CPU), a general processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logic blocks, modules and circuits described in combination with the disclosure of this application. The processing unit 802 can also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of DSP and microprocessors, and the like. The communication unit 803 can be a communication interface, a transceiver, a transceiver circuit, etc., and the storage unit 801 can be a memory. When the processing unit 802 is a processor, the communication unit 803 is a communication interface, and the storage unit 801 is a memory, the transmission power control report triggering device 800 involved in the embodiment of the present application can be the access point shown in Figure 10.

Specifically, the processing unit 802 is used to execute any step executed by the access point in the above method embodiment, and when performing data transmission such as sending, the communication unit 803 may be selectively called to complete the corresponding operation.

The processing unit 802 is used to: send a trigger frame, where the trigger frame is used to trigger M sites to simultaneously feed back a transmission power control report, where the value of M is an integer greater than or equal to 1.

It should be noted that the specific implementation of each operation in the embodiment shown in FIG. 8 can be found in the description of the method embodiment shown in FIG. 6 above, and will not be repeated here.

It can be seen that the power control report triggering device 800 sends a trigger frame, which is used to trigger M sites to simultaneously feed back the power control report, so that at least one site can simultaneously feed back the power control report through one trigger frame, which is beneficial to reduce resource overhead and improve information transmission efficiency.

Specifically, the sending power control report carries at least one of the following: link margin information, sending power information, and power margin information; wherein the link margin information is used to indicate the ratio of the receiving power of the trigger frame received by the first site to the minimum receiving power required by the first site; the sending power information is used to indicate the sending power of the sending power control report fed back by the first site; the power margin information is used to indicate the decibel difference between the sending power capability of the first site and the sending power of the sending power control report fed back by the first site; the first site is at least one of the M sites.

Specifically, if the transmission power capability of the first site is affected, the transmission power control report carries the power headroom information.

Specifically, the transmission power capacity of the first site is affected by at least one of the following: the device to which the first site belongs is overheated, thereby affecting the transmission power capacity of the first site; the wireless communication modules of the device to which the first site belongs, except for the first site, share the transmission power capacity, thereby affecting the transmission power capacity of the first site.

Specifically, the trigger frame includes at least one of the following: a common information field and at least one user information field; wherein the common information field contains information for triggering M sites to simultaneously feed back a send power control report; or, the user information field contains information for triggering M sites to simultaneously feed back a send power control report; or, a common information subfield associated with the trigger frame type in the common information field contains information for triggering M sites to simultaneously feed back a send power control report; or, a user information subfield associated with the trigger frame type in the user information field contains information for triggering M sites to simultaneously feed back a send power control report.

Specifically, the simultaneous feedback is used to indicate that some or all of the M sites feed back the transmission power control report on the same time domain resource, where the time domain resource is indicated by a trigger frame.

Specifically, some or all of the M sites feed back a transmission power control report on different resources, where the resources include resource units in the frequency domain or spatial streams in the spatial domain, and the resources are indicated by a trigger frame.

Specifically, the trigger frame is one of the following: a cache status report polling trigger frame, a beamforming report polling trigger frame, and a newly defined trigger frame.

Specifically, if the trigger frame is a newly defined trigger frame, the value of the trigger type subfield in the common information field of the trigger frame is set to any value from 8 to 15.

Specifically, if the trigger frame is a cache status report polling trigger frame, the trigger frame is also used to trigger M stations to feed back cache status reports simultaneously.

Specifically, if the trigger frame is a beamforming report polling trigger frame, the trigger frame is also used to trigger M sites to feed back beamforming reports simultaneously.

In the case of using an integrated unit/module, FIG9 provides a block diagram of the functional units of another transmission power control report triggering device. The transmission power control report triggering device 900 includes: a processing unit 902 and a communication unit 903. The processing unit 902 is used to control and manage the actions of the site. For example, the processing unit 902 is used to support the site to execute the steps in FIG6 and other processes of the technical solution described in the present application. The communication unit 903 is used to support the communication between the site and other devices in the wireless communication system. The transmission power control report triggering device 900 may also include a storage unit 901 for storing the program code executed by the transmission power control report triggering device 900 and the transmitted data.

It should be noted that the sending power control report triggering device 900 may be a chip or a chip module.

Among them, the processing unit 902 can be a processor or a controller, for example, a central processing unit (CPU), a general processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logic boxes, modules and circuits described in combination with the disclosure of this application. The processing unit 902 can also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of DSP and microprocessors, and the like. The communication unit 903 can be a communication interface, a transceiver, a transceiver circuit, etc., and the storage unit 1501 can be a memory. When the processing unit 902 is a processor, the communication unit 903 is a communication interface, and the storage unit 901 is a memory, the transmission power control report triggering device 900 involved in the embodiment of the present application can be the site shown in Figure 11.

In specific implementation, the processing unit 902 is used to execute any step executed by the station in the above method embodiment, and when performing data transmission such as sending, the communication unit 903 can be selectively called to complete the corresponding operation.

The processing unit 902 is used to: obtain a trigger frame, where the trigger frame is used to trigger M sites to simultaneously feed back a transmission power control report, where the value of M is an integer greater than or equal to 1.

It should be noted that the specific implementation of each operation in the embodiment shown in FIG. 9 can be found in the description of the method embodiment shown in FIG. 6 above, and will not be repeated here.

It can be seen that the sending power control report triggering device 900 obtains the trigger frame, which is used to trigger M sites to simultaneously feed back the sending power control report, so that at least one site can simultaneously feed back the sending power control report through one trigger frame, which is beneficial to reduce resource overhead and improve information transmission efficiency.

Please refer to Figure 10, which is a schematic diagram of the structure of an access point provided in an embodiment of the present application. The access point 1000 includes a processor 1010, a memory 1020, a communication interface 1030, and a communication bus for connecting the processor 1010, the memory 1020, and the communication interface 1030.

The memory 1020 includes but is not limited to random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or portable read-only memory (CD-ROM), and is used to store program codes executed by the access point 1000 and data transmitted.

The communication interface 1030 is used to receive and send data.

The processor 1010 may be one or more CPUs. When the processor 1010 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

The processor 1010 in the access point 1000 is used to read at least one program 1021 stored in the memory 1020, and perform the following operations: sending a trigger frame, the trigger frame is used to trigger M sites to simultaneously feed back a transmission power control report, and the value of M is an integer greater than or equal to 1.

It should be noted that the specific implementation of each operation can adopt the corresponding description of the method embodiment shown in Figure 6 above. The access point 1000 can be used to execute the method on the access point side of the above method embodiment of the present application, which will not be described in detail here.

Specifically, the sending power control report carries at least one of the following: link margin information, sending power information, and power margin information; wherein the link margin information is used to indicate the ratio of the receiving power of the trigger frame received by the first site to the minimum receiving power required by the first site; the sending power information is used to indicate the sending power of the sending power control report fed back by the first site; the power margin information is used to indicate the decibel difference between the sending power capability of the first site and the sending power of the sending power control report fed back by the first site; the first site is at least one of the M sites.

Specifically, if the transmission power capability of the first site is affected, the transmission power control report carries the power headroom information.

Specifically, the transmission power capacity of the first site is affected by at least one of the following: the device to which the first site belongs is overheated, thereby affecting the transmission power capacity of the first site; the wireless communication modules of the device to which the first site belongs other than the first site share the transmission power capacity, thereby affecting the transmission power capacity of the first site.

Specifically, the trigger frame includes at least one of the following: a common information field and at least one user information field; wherein the common information field contains information for triggering M sites to simultaneously feed back a send power control report; or, the user information field contains information for triggering M sites to simultaneously feed back a send power control report; or, a common information subfield associated with the trigger frame type in the common information field contains information for triggering M sites to simultaneously feed back a send power control report; or, a user information subfield associated with the trigger frame type in the user information field contains information for triggering M sites to simultaneously feed back a send power control report.

Specifically, the simultaneous feedback is used to indicate that some or all of the M sites feed back the transmission power control report on the same time domain resource, where the time domain resource is indicated by a trigger frame.

Specifically, some or all of the M sites feed back a transmission power control report on different resources, where the resources include resource units in the frequency domain or spatial streams in the spatial domain, and the resources are indicated by a trigger frame.

Specifically, the trigger frame is one of the following: a cache status report polling trigger frame, a beamforming report polling trigger frame, and a newly defined trigger frame.

Specifically, if the trigger frame is a newly defined trigger frame, the value of the trigger type subfield in the common information field of the trigger frame is set to any value from 8 to 15.

Specifically, if the trigger frame is a buffer status report polling trigger frame, the trigger frame is also used to trigger the M stations to feed back buffer status reports.

Specifically, if the trigger frame is a beamforming report polling trigger frame, the trigger frame is also used to trigger M sites to feed back beamforming reports.

Please refer to Figure 11, which is a schematic diagram of the structure of a site provided in an embodiment of the present application. The site 1100 includes a processor 1110, a memory 1120, a communication interface 1130, and a communication bus for connecting the processor 1110, the memory 1120, and the communication interface 1130.

The memory 1120 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or portable read-only memory (CD-ROM), and is used to store the program code executed by the site 1100 and the transmitted data.

The communication interface 1130 is used to receive and send data.

The processor 1110 may be one or more CPUs. When the processor 1110 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

The processor 1110 in the site 1100 is used to read at least one program 1121 stored in the memory 1120, and perform the following operations: obtaining a trigger frame, the trigger frame is used to trigger M sites to simultaneously feed back a transmission power control report, and the value of M is an integer greater than or equal to 1.

It should be noted that the specific implementation of each operation can adopt the corresponding description of the method embodiment shown in Figure 6 above. The site 1100 can be used to execute the site-side method of the above method embodiment of the present application, which will not be described in detail here.

An embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program and data for electronic data exchange, wherein the computer program and data enable a computer to execute some or all of the steps described by the station or access point in the above method embodiment.

The present application also provides a computer program product, wherein the computer program product includes a computer program, and the computer program is operable to enable a computer to execute some or all of the steps described by the station or access point in the above method embodiment. The computer program product can be a software installation package.

It should be noted that, for the above-mentioned various embodiments, for the sake of simple description, they are all expressed as a series of action combinations. Those skilled in the art should be aware that the present application is not limited by the described order of actions, because some steps in the embodiments of the present application can be performed in other orders or simultaneously. In addition, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions, steps, modules or units involved are not necessarily required by the embodiments of the present application.

In the above embodiments, the embodiments of the present application have different focuses on the description of each embodiment. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

Those skilled in the art should be aware that the methods, steps or functions of related modules/units described in the embodiments of the present application can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product, or it can be implemented by a processor executing a computer program instruction. Wherein, the computer program product includes at least one computer program instruction, and the computer program instruction can be composed of corresponding software modules, and the software module can be stored in RAM, flash memory, ROM, EPROM, EEPROM, register, hard disk, mobile hard disk, read-only compact disk (CD-ROM) or any other form of storage medium known in the art. The computer program instruction can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program instruction can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium, or a semiconductor medium (eg, an SSD), etc.

The modules/units included in the devices or products described in the above embodiments may be software modules/units, hardware modules/units, or may be partially software modules/units and partially hardware modules/units. For example, for each device or product applied to or integrated in a chip, each module/unit included therein may be implemented in the form of hardware such as circuits; or, a portion of the modules/units included therein may be implemented in the form of a software program, which runs on a processor integrated inside the chip, while a portion of the modules/units of another portion (if any) may be implemented in the form of hardware such as circuits. The same is true for each device or product applied to or integrated in a chip module, or each device or product applied to or integrated in a terminal.

The specific implementation methods described above further describe the purpose, technical solutions and beneficial effects of the embodiments of the present application in detail. It should be understood that the above description is only the specific implementation method of the embodiments of the present application and is not intended to limit the protection scope of the embodiments of the present application. Any modification, equivalent replacement, improvement, etc. made on the basis of the technical solution of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims (25)

1. A method for triggering a transmission power control report, comprising:

The access point sends a trigger frame, wherein the trigger frame is used for triggering M stations to feed back a transmission power control report at the same time, and the value of M is an integer greater than 1;

The trigger frame includes at least one of: a public information field, at least one user information field; wherein,

The common information field contains information for triggering the M stations to feed back the transmission power control report simultaneously; or alternatively

The user information field contains information for triggering the M stations to feed back the transmission power control report at the same time; or alternatively

A common information subfield related to a trigger frame type in the common information field contains information for triggering the M stations to feed back the transmission power control report at the same time; or alternatively

The user information subfield related to the trigger frame type in the user information field contains information for triggering the M stations to feed back the transmission power control report at the same time.

2. The method of claim 1, wherein the transmit power control report carries at least one of: link margin information, transmission power information, and power margin information; wherein,

The link margin information is used for representing the ratio of the received power of the trigger frame received by the first station to the minimum received power required by the first station;

the sending power information is used for indicating sending power of the sending power control report fed back by the first station;

the power headroom information is used for representing a difference value between the transmission power capacity of the first station and the transmission power of the transmission power control report fed back by the first station;

The first station is at least one station of the M stations.

3. The method of claim 2, wherein the transmit power control report carries the power headroom information if transmit power capability of the first station is affected.

4. A method according to claim 3, wherein the affected transmit power capability of the first station comprises at least one of: the device of the first station is overheated to influence the transmission power capability of the first station, and the wireless communication modules of the device of the first station except the first station share the transmission power capability to influence the transmission power capability of the first station.

5. The method of claim 1, wherein the simultaneous feedback is used to indicate that some or all of the M stations feedback the transmit power control report on a same time domain resource, the time domain resource indicated by the trigger frame.

6. The method of claim 1, wherein some or all of the M stations feedback the transmit power control report on different resources, the resources comprising resource elements in a frequency domain or spatial streams in a spatial domain, the resources being indicated by the trigger frame.

7. The method of any of claims 1-6, wherein the trigger frame is one of: a status report poll trigger frame, a beamforming report poll trigger frame, a newly defined trigger frame.

8. The method of claim 7, wherein if the trigger frame is the newly defined trigger frame, the value of the trigger type subfield in the common information field of the trigger frame is set to any one of values 8 to 15.

9. The method of claim 7, wherein if the trigger frame is the buffer status report poll trigger frame, the trigger frame is further used to trigger the M stations to feed back buffer status reports simultaneously.

10. The method of claim 7, wherein if the trigger frame is the beamforming report polling trigger frame, the trigger frame is further used to trigger the M stations to feed back beamforming reports simultaneously.

11. A method for triggering a transmission power control report, comprising:

the station acquires a trigger frame, wherein the trigger frame is used for triggering M stations to feed back a transmission power control report at the same time, and the value of M is an integer greater than 1;

The trigger frame includes at least one of: a public information field, at least one user information field; wherein,

The common information field contains information for triggering the M stations to feed back the transmission power control report simultaneously; or alternatively

The user information field contains information for triggering the M stations to feed back the transmission power control report at the same time; or alternatively

A common information subfield related to a trigger frame type in the common information field contains information for triggering the M stations to feed back the transmission power control report at the same time; or alternatively

The user information subfield related to the trigger frame type in the user information field contains information for triggering the M stations to feed back the transmission power control report at the same time.

12. The method of claim 11, wherein the transmit power control report carries at least one of: link margin information, transmission power information, and power margin information; wherein,

The link margin information is used for representing the ratio of the received power of the trigger frame received by the first station to the minimum received power required by the first station;

the sending power information is used for indicating sending power of the sending power control report fed back by the first station;

the power headroom information is used for representing a difference value between the transmission power capacity of the first station and the transmission power of the transmission power control report fed back by the first station;

The first station is at least one station of the M stations.

13. The method of claim 12, wherein the transmit power control report carries the power headroom information if transmit power capability of the first station is affected.

14. The method of claim 13, wherein the affected transmit power capability of the first station comprises at least one of: the device of the first station is overheated to influence the transmission power capability of the first station, and the wireless communication modules of the device of the first station except the first station share the transmission power capability to influence the transmission power capability of the first station.

15. The method of claim 11, wherein the simultaneous feedback is used to indicate that some or all of the M stations feedback the transmit power control report on a same time domain resource, the time domain resource indicated by the trigger frame.

16. The method of claim 11, wherein some or all of the M stations feedback the transmit power control report on different resources, the resources comprising resource elements in a frequency domain or spatial streams in a spatial domain, the resources being indicated by the trigger frame.

17. The method according to any of claims 11-16, wherein the trigger frame is one of: a status report poll trigger frame, a beamforming report poll trigger frame, a newly defined trigger frame.

18. The method of claim 17, wherein if the trigger frame is the newly defined trigger frame, the value of the trigger type subfield in the common information field of the trigger frame is set to any one of values 8 to 15.

19. The method of claim 17 wherein if the trigger frame is the buffer status report poll trigger frame, the trigger frame is further used to trigger the M stations to feed back buffer status reports.

20. The method of claim 17, wherein if the trigger frame is the beamforming report polling trigger frame, the trigger frame is further used to trigger the M stations to feed back beamforming reports.

21. A transmit power control report triggering apparatus, the apparatus comprising a processing unit and a communication unit, the processing unit configured to:

transmitting a trigger frame through the communication unit, wherein the trigger frame is used for triggering M stations to feed back a transmission power control report at the same time, and the value of M is an integer greater than 1;

The trigger frame includes at least one of: a public information field, at least one user information field; wherein,

The common information field contains information for triggering the M stations to feed back the transmission power control report simultaneously; or alternatively

The user information field contains information for triggering the M stations to feed back the transmission power control report at the same time; or alternatively

A common information subfield related to a trigger frame type in the common information field contains information for triggering the M stations to feed back the transmission power control report at the same time; or alternatively

The user information subfield related to the trigger frame type in the user information field contains information for triggering the M stations to feed back the transmission power control report at the same time.

22. A transmit power control report triggering apparatus, the apparatus comprising a processing unit and a communication unit, the processing unit configured to:

Receiving a trigger frame through the communication unit, wherein the trigger frame is used for triggering M stations to feed back a transmission power control report at the same time, and the value of M is an integer greater than 1;

The trigger frame includes at least one of: a public information field, at least one user information field; wherein,

The common information field contains information for triggering the M stations to feed back the transmission power control report simultaneously; or alternatively

The user information field contains information for triggering the M stations to feed back the transmission power control report at the same time; or alternatively

A common information subfield related to a trigger frame type in the common information field contains information for triggering the M stations to feed back the transmission power control report at the same time; or alternatively

The user information subfield related to the trigger frame type in the user information field contains information for triggering the M stations to feed back the transmission power control report at the same time.

23. An access point comprising a processor, a memory, a communication interface, and at least one program stored in the memory and configured to be executed by the processor, the at least one program comprising instructions for performing the steps in the method of any of claims 1-10.

24. A station comprising a processor, a memory, a communication interface, and at least one program stored in the memory and configured to be executed by the processor, the at least one program comprising instructions for performing the steps in the method of any of claims 11-20.

25. A computer readable storage medium, characterized in that it stores a computer program and data for electronic data exchange, wherein the computer program and data cause a computer to perform the method according to any of claims 1-20.