WO2022068457A1

WO2022068457A1 - Information transmission method and communication device

Info

Publication number: WO2022068457A1
Application number: PCT/CN2021/113498
Authority: WO
Inventors: 柳剑飞; 王伟杰; 孙艳宾
Original assignee: 华为技术有限公司
Priority date: 2020-09-30
Filing date: 2021-08-19
Publication date: 2022-04-07
Also published as: CN114339875B; CN114339875A

Abstract

The present application provides an information transmission and a communication device, capable of improving scheduling efficiency and facilitating timely transmission of uplink data. Specifically, an STA generates a block acknowledgement frame, the block acknowledgement frame comprising a buffer state report of the STA; then the STA sends the block acknowledgement frame to an AP. By carrying the buffer state report in the block acknowledgement frame, the process of the AP querying cached information of the STA by using a BSRP frame can be omitted, and thus the expenditure of time caused by this process can be reduced.

Description

Information transmission method and communication device

This application claims the priority of the Chinese patent application with the application number 202011058113.9 and the application name "Information Transmission Method and Communication Device" filed with the State Intellectual Property Office of China on September 30, 2020, the entire contents of which are incorporated herein by reference middle.

technical field

The present application relates to the field of communication, and more particularly, to an information transmission method and a communication device.

Background technique

In a wireless local area network (WLAN), the access point (AP) needs to know the buffer state report (BSR) of the STA (station, STA) when performing uplink scheduling. Specifically, the AP sends a buffer status report poll (BSRP) frame to the STA to inquire about the BSR of the STA. After the STA receives the BSRP frame, the STA controls the frame control of the media access control (MAC) frame. The field or BSR field feeds back the BSR. After receiving the BSR fed back by the STA, the AP allocates a resource for transmitting uplink data to the STA, and then the STA can send uplink data on the resource.

In the above solution, the time overhead brought by sending the BSRP frame and replying to the BSR is relatively large, about 300-400us, which will affect the timely sending of uplink data.

SUMMARY OF THE INVENTION

The present application provides an information transmission method and a communication device. By using a block acknowledgement (BA) frame to feed back a BSR, the process of an AP using a BSRP frame to query the BSR of a STA can be omitted, thereby improving scheduling efficiency and facilitating uplink. Timely delivery of data.

In a first aspect, an information transmission method is provided, including: a STA generates a block acknowledgment frame, where the block acknowledgment frame includes a buffer status report of the STA, and the buffer status report is used by an AP to allocate and transmit uplink data for the STA resource; the STA sends the block acknowledgment frame to the AP.

According to the information transmission method provided by the embodiment of the present application, the STA can feed back the buffer status report by confirming the frame frame, which can save the process of the AP querying the STA's buffer information by using the BSRP frame, thereby saving the time overhead caused by the process. The scheduling efficiency is improved, which is conducive to the timely transmission of uplink data.

With reference to the first aspect, in some implementations of the first aspect, the BACK Type field in the BACK control field in the BACK frame indicates that the BACK frame includes the buffer status report.

With reference to the first aspect, in some implementations of the first aspect, the buffer status report field in the BACK frame includes the buffer status report; The reserved field includes the cache status report.

With reference to the first aspect, in some implementations of the first aspect, before the STA generates a block acknowledgment frame, the method further includes: the STA receives downlink data from the AP.

It should be understood that in this implementation manner, the block determination frame further includes indication information, where the indication information is used to indicate whether the STA correctly receives downlink data from the AP.

With reference to the first aspect, in some implementations of the first aspect, before the STA generates a block acknowledgement frame, the method further includes: the STA receives a block acknowledgement request (BAR) from the AP ) frame, the block ack request frame instructs the STA to feed back the buffer status report.

It should be noted that the AP may send the block ack request frame after sending the downlink data, or the AP may also send the block ack request frame when there is no downlink data.

Based on this solution, the block acknowledgment request frame can be used to request the STA to feed back the buffer status report through the BA frame, so that the STA can feed back the buffer status report without waiting for the AP to send the RSRP frame, so that the AP can obtain the buffer status report of the STA in time. Schedule the STA in time.

With reference to the first aspect, in some implementations of the first aspect, the BACK request type field in the BACK request control field in the BACK request frame instructs the STA to feed back the buffer status report; or, all The reserved field in the block ack request control field in the block ack request frame instructs the STA to feed back the buffer status report; or, the block ack request type field and the reservation field jointly instruct the STA to feed back the The cache status report described above.

With reference to the first aspect, in some implementations of the first aspect, the block acknowledgment frame further includes a transmit power to be used by the STA to transmit the uplink data.

In the current technology, the STA's uplink transmit power is implemented by an AP measurement algorithm. The AP determines the STA's target transmit power and then indicates it to the STA, and the STA adjusts the power by itself according to the target transmit power. However, since the STA capability is unknown, the STA may not be able to adjust the target transmit power, which may cause uplink transmission failure.

Based on the above solution, by carrying the transmit power to be used by the STA to send uplink data in the BA frame, the AP can adjust the transmit power of the STA to an appropriate receive power to receive the uplink data, thereby improving the success rate of uplink transmission.

With reference to the first aspect, in some implementations of the first aspect, the block acknowledgment frame further includes an adjustment margin of the transmit power, and the transmit power and the adjustment margin are used by the AP to determine the The target transmit power of the STA.

Based on this solution, after receiving the transmit power of the STA and the adjustment margin of the transmit power, the AP can configure the target transmit power of the STA for this uplink transmission. During this uplink transmission, the STA may use the target transmit power for uplink transmission, which is beneficial to improve the success rate of uplink transmission.

In conjunction with the first aspect, in some implementations of the first aspect, the BACK Type field in the BACK control field in the BACK frame indicates that the BACK frame includes the transmit power.

It should be understood that the block ack type field may indicate that the block ack frame includes both the transmit power and the buffer status report.

With reference to the first aspect, in some implementations of the first aspect, the transmission power field in the BACK frame includes the transmission power; or, the reserved field in the BACK control field in the BACK frame Including the transmit power.

With reference to the first aspect, in some implementations of the first aspect, before the STA generates a block acknowledgment frame, the method further includes: the STA receives a block acknowledgment request frame from the AP, the block acknowledgment The request frame instructs the STA to feed back the transmit power.

With reference to the first aspect, in some implementations of the first aspect, the BACK request type field in the BACK request control field in the BACK request frame instructs the STA to feed back the transmit power; or, the The reserved field in the block ack request control field in the block ack request frame instructs the STA to feed back the transmit power information; or, the block ack request type field and the reservation field jointly instruct the STA to feed back the transmit power.

A second aspect provides an information transmission method, comprising: an AP receiving a block acknowledgment frame from a STA, where the block acknowledgment frame includes a buffer status report of the STA; and the AP determines the buffer status report according to the buffer status report. The STA transmits resources for uplink data; the AP sends resource scheduling information to the STA, and the resource scheduling information indicates the resources.

In conjunction with the second aspect, in some implementations of the second aspect, the BACK Type field in the BACK control field in the BACK frame indicates that the BACK frame includes the buffer status report.

With reference to the second aspect, in some implementations of the second aspect, the buffer status report field in the BACK frame includes the buffer status report; The reserved field includes the cache status report.

With reference to the second aspect, in some implementations of the second aspect, before the AP receives the block acknowledgment frame from the STA, the method further includes: the AP sends downlink data to the STA.

With reference to the second aspect, in some implementations of the second aspect, before the AP receives the block acknowledgment frame from the STA, the method further includes: the AP sends a block acknowledgment request frame to the STA, the The Block Ack Request frame instructs the STA to feed back the buffer status report.

With reference to the second aspect, in some implementations of the second aspect, the BACK request type field in the BACK request control field in the BACK request frame instructs the STA to feed back the buffer status report; or, all the reserved field in the block ack request control field in the block ack request frame instructs the STA to feed back the buffer status report; or,

The block ack request type field and the reservation field jointly instruct the STA to feed back the buffer status report.

With reference to the second aspect, in some implementation manners of the second aspect, the block acknowledgment frame further includes a transmit power to be used by the STA to transmit the uplink data.

With reference to the second aspect, in some implementations of the second aspect, the block acknowledgment frame further includes an adjustment margin of the transmit power, and the transmit power and the adjustment margin are used by the AP to determine the The target transmit power of the STA.

In conjunction with the second aspect, in some implementations of the second aspect, the BACK Type field in the BACK control field in the BACK frame indicates that the BACK frame includes the transmit power.

With reference to the second aspect, in some implementations of the second aspect, the transmission power field in the BACK frame includes the transmission power; or, the reserved field in the BACK control field in the BACK frame Including the transmit power.

With reference to the second aspect, in some implementations of the second aspect, before the AP receives the block acknowledgment frame from the STA, the method further includes: the AP sends a block acknowledgment request frame to the STA, the The Block Ack Request frame instructs the STA to feed back the transmit power.

With reference to the second aspect, in some implementations of the second aspect, the BACK request type field in the BACK request control field in the BACK request frame instructs the STA to feed back the transmit power; or, the The reserved field in the block ack request control field in the block ack request frame instructs the STA to feed back the transmit power information; or, the block ack request type field and the reservation field jointly instruct the STA to feed back the transmit power.

In a third aspect, an information transmission method is provided, including: a station STA generates a block acknowledgment frame, where the block acknowledgment frame includes information about a transmission power to be used by the STA to send uplink data; the STA sends an access point AP The block acknowledgement frame.

In the previous technology, the STA's uplink transmit power depends on the AP's measurement algorithm. The AP determines the STA's target transmit power and then indicates it to the STA. The STA adjusts the power by itself according to the target transmit power in the trigger frame. However, since the STA capability is unknown, the STA may not be able to adjust the target transmit power, which may cause uplink transmission failure.

According to the solution provided by the embodiment of the present application, by carrying the transmit power to be used by the STA to send uplink data in the BA frame, the AP can adjust the transmit power of the STA to an appropriate receive power to receive the uplink data, thereby improving the uplink transmission efficiency. Success rate.

Optionally, the block acknowledgment frame further includes an adjustment margin of the transmit power, and the transmit power and the adjustment margin are used by the AP to determine the target transmit power of the STA.

Based on this technical solution, the AP can configure the target transmit power of the STA for this uplink transmission based on the transmit power reported by the STA and the adjustment margin of the transmit power, so that the STA can use the target transmit power for uplink transmission during this uplink transmission. transmission, which is beneficial to improve the success rate of uplink transmission.

In a fourth aspect, an information transmission method is provided, comprising: an AP receiving a block acknowledgment frame from a STA, where the block acknowledgment frame includes information of a transmission power to be used by the STA to send uplink data.

According to the solution provided by the embodiments of the present application, by carrying the transmit power to be used by the STA to send uplink data in the BA frame, the AP can adjust the transmit power of the STA to an appropriate receive power to receive the uplink data, thereby improving the success of uplink transmission. Rate.

In a fifth aspect, a communication apparatus is provided, including each module or unit for performing the method of the first aspect or the third aspect, or any possible implementation manner of the first aspect or the third aspect.

In a sixth aspect, a communication apparatus is provided, including each module or unit for performing the method of the second aspect or the fourth aspect, or any possible implementation manner of the second aspect or the fourth aspect.

In a seventh aspect, an apparatus is provided, including a processor. The processor is coupled to the memory and can be used to execute instructions in the memory, so that the apparatus performs the above-mentioned first aspect or the third aspect, or the method in any possible implementation manner of the first aspect or the third aspect. Optionally, the apparatus further includes a memory. Optionally, the apparatus further includes an interface circuit, and the processor is coupled to the interface circuit.

In an eighth aspect, an apparatus is provided, including a processor. The processor is coupled to the memory and can be used to execute instructions in the memory, so that the apparatus performs the method of the second aspect or the fourth aspect, or any possible implementation manner of the second aspect or the fourth aspect. Optionally, the apparatus further includes a memory. Optionally, the apparatus further includes an interface circuit, and the processor is coupled to the interface circuit.

In a ninth aspect, a processor is provided, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor performs the first aspect or the third aspect, or, in any possible implementation manner of the first aspect or the third aspect Methods.

In a specific implementation process, the above-mentioned processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter, and the input circuit and output The circuit can be the same circuit that acts as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.

In a tenth aspect, a processor is provided, comprising: an input circuit, an output circuit and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the second aspect or the fourth aspect, or, in any possible implementation manner of the second aspect or the fourth aspect Methods.

In an eleventh aspect, a processing apparatus is provided, including a processor and a memory. The processor is configured to read the instructions stored in the memory, and can receive signals through the receiver and transmit signals through the transmitter, so as to execute the first aspect to the fourth aspect or any one of the possible implementation manners of the first aspect to the fourth aspect method in .

The processing device in the eleventh aspect above may be a chip, and the processor may be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software When implemented, the processor may be a general-purpose processor, which is implemented by reading software codes stored in a memory, and the memory may be integrated in the processor or located outside the processor and exist independently.

A twelfth aspect provides a computer program product, the computer program product comprising: a computer program (also referred to as code, or instructions), when the computer program is executed, causes the computer to execute the above-mentioned first to fourth aspects Aspect or the method of any of the possible implementations of the first to fourth aspects.

In a thirteenth aspect, a computer-readable medium is provided, the computer-readable medium stores a computer program (also referred to as code, or instruction), when it is run on a computer, causing the computer to execute the above-mentioned first to sixth aspects. The method in the fourth aspect or any one possible implementation manner of the first aspect to the fourth aspect.

A fourteenth aspect provides a communication system, characterized in that it includes the communication device of the fifth aspect and the sixth aspect, or the device of the seventh aspect and the eighth aspect.

Description of drawings

FIG. 1 is a schematic diagram of a system block diagram that can be applied to an embodiment of the present application.

FIG. 2 is a schematic flowchart of a STA cache query mechanism.

FIG. 3 is a schematic flowchart of an information transmission method provided by an embodiment of the present application.

FIG. 4 is a schematic diagram of a frame structure of a BAR frame provided by an embodiment of the present application.

FIG. 5 is a schematic diagram of a frame structure of a BA frame provided by an embodiment of the present application.

FIG. 6 is a schematic diagram of a frame structure of another BA frame provided by an embodiment of the present application.

FIG. 7 is a schematic flowchart of another information transmission method provided by an embodiment of the present application.

FIG. 8 is a schematic diagram of a communication apparatus provided by an embodiment of the present application.

FIG. 9 is a schematic diagram of a communication apparatus provided by an embodiment of the present application.

FIG. 10 is a schematic diagram of a communication apparatus provided by an embodiment of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The technical solutions of the embodiments of the present application may be applied to a wireless local area network (Wireless Local Area Network, WLAN). The WLAN system can access various cellular systems, such as: long term evolution (LTE), LTE frequency division duplex (FDD), LTE time division duplex (TDD), universal mobile communication system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5th generation, 5G) system or new radio (new radio, NR), etc.

The AP in the embodiment of the present application is a communication device that has a wireless transceiver function and provides services for the STA, and is also referred to as a wireless access point or a hotspot. APs are access points for mobile users to access wired networks. They are mainly deployed in homes, buildings, and campuses, with a typical coverage radius ranging from tens of meters to hundreds of meters. Of course, they can also be deployed outdoors. AP is equivalent to a bridge connecting wired network and wireless network. Its main function is to connect various wireless network clients together, and then connect the wireless network to Ethernet.

The STA in this embodiment of the present application is a communication device with a wireless communication function, which may be a wireless communication chip, a wireless sensor, or a wireless communication terminal. For example: mobile phones supporting wireless fidelity (WiFi) communication functions, tablet computers supporting WiFi communication functions, set-top boxes supporting WiFi communication functions, smart TVs supporting WiFi communication functions, smart wearable devices supporting WiFi communication functions , In-vehicle communication equipment supporting WiFi communication function, computer supporting WiFi communication function, IoT node in IoT supporting WiFi communication function, etc.

In this embodiment of the present application, the AP or STA includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. This hardware layer includes hardware such as central processing unit (CPU), memory management unit (MMU), and memory (also called main memory). The operating system may be any one or more computer operating systems that implement business processing through processes, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. In addition, the embodiments of the present application do not specifically limit the specific structure of the execution body of the methods provided by the embodiments of the present application, as long as the program that records the codes of the methods provided by the embodiments of the present application can be executed to provide the methods provided by the embodiments of the present application. For example, the execution subject of the method provided in this embodiment of the present application may be an AP or STA, or a functional module in the AP or STA that can call a program and execute the program, or has the function of an AP or STA chip.

Additionally, various aspects or features of the embodiments of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used in the embodiments of this application encompasses a computer program accessible from any computer-readable device, carrier or medium. For example, computer readable media may include, but are not limited to: magnetic storage devices (eg, hard disks, floppy disks, or magnetic tapes, etc.), optical disks (eg, compact discs (CDs), digital versatile discs (DVDs) etc.), smart cards and flash memory devices (eg, erasable programmable read-only memory (EPROM), card, stick or key drives, etc.). Additionally, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.

FIG. 1 shows a system block diagram that can be applied to the embodiments of the present application. As shown in FIG. 1, the system 100 may include at least one STA and one AP, such as AP 110 and STA 120, and AP 110 may communicate with STA 120 through a wireless link. It should be understood that the system 100 may also include more APs and STAs.

With the increasing number of access devices (ie, STAs) in the WLAN, in some scenarios, a large number of access devices need to perform uplink transmission in coordination at the same time. The IEEE 802.11ax standard introduces orthogonal frequency division multiple access (OFDMA) and multi-user multiple-input multiple-output (MU-MIMO) technologies to solve the problem of multi-user access . Generally, user scheduling resource allocation depends on the data buffer and transmission rate information to be sent by the user. The transmission direction from AP to STA is defined as the downlink direction, and vice versa as the uplink direction. In the downlink direction, the STA user scheduling resources can calculate the allocated bandwidth according to the data buffered on the AP side and the transmission rate obtained by statistics. In the uplink direction, using OFDMA or MU-MIMO technology for user uplink scheduling needs to know the STA user data buffer information, and the STA user data buffer information is on the STA side, and the AP side needs to obtain this information for scheduling.

The IEEE 802.11ax specification defines the STA cache query mechanism. The AP sends a BSRP frame to the STA to query the STA's cache information. For example, FIG. 2 shows an example of AP query and STA feedback buffer information. Referring to Figure 2, the AP sends BSRP frames to SAT1-STA4 at the same time. After receiving the BSRP frames, STA1-STA4 feeds back BSR in the frame control field or BSR field of their respective MAC frames, that is, the uplink (uplink, UL) shown in the figure. BSR (STA1)-UL BSR (STA4), where BSR is the buffer information of the STA. After receiving the buffer feedback information of the STA, the AP sends a trigger frame to STA1-STA4 for scheduling resource allocation, and then STA1-STA4 can send uplink data. It should be understood that the meaning and effect of the preamble (preamble) and the short inter-frame spacing (SIFS) shown in Figure 2 are the same as those in the prior art. Specifically, reference can be made to the prior art, which will not be repeated here. .

The above-mentioned STA cache query mechanism requires the AP to send a BSRP frame for requesting the STA's cache information, and the STA can report the cache information only after receiving the BSRP frame. Such a process will bring a large time overhead, about 300 to 400us, which affects the timely sending of uplink data.

In view of this, the present application provides an information transmission method. By using the BA frame to feed back the BSR, that is, the buffer information, the AP can save the process of using the BSRP frame to query the STA's buffer information, thereby saving the cost caused by the process. Time overhead, improve scheduling efficiency, and facilitate timely transmission of uplink data.

Before introducing the embodiments of the present application in detail, a BA frame is briefly introduced to distinguish a BA frame from a BSRP frame.

Traditional WLAN access adopts enhanced distributed channel access (EDCA) competition access. Users need to obtain access opportunities according to EDCA competition parameters. Delay cannot be guaranteed. In addition, there is interference in the wireless channel, etc., resulting in data transmission errors. To ensure reliable transmission, the IEEE 802.11 standard specifies an acknowledgement (ACK) mechanism for ensuring the reliability of wireless transmission. Specifically, the AP sends the downlink data, the STA receives the downlink data and performs demodulation and verification, and after the SIFS time, the verification result is fed back to the AP through the BA frame. The AP can learn whether the STA correctly receives the downlink data according to the BA frame.

Those skilled in the art may know that the BSRP frame is a trigger frame that triggers the STA to feed back buffer information, and the BA frame is used for the STA to feedback whether the downlink data is correctly received, and these two frames are essentially two different frames. The technical solution of the embodiment of the present application is to use the BA frame to feed back the buffer information, so that the AP can obtain the buffer information of the STA by parsing the BA frame without querying the buffer information of the STA through the BSRP frame.

The solutions of the embodiments of the present application will be described in detail below.

FIG. 3 is a schematic flowchart of an information transmission method provided by an embodiment of the present application. Each step of the method 300 shown in FIG. 3 will be described below.

S310, the AP sends downlink data to the STA. Accordingly, the STA receives downlink data from the AP.

S320, the AP sends a block acknowledgment request frame (ie, a BAR frame) to the STA. Accordingly, the STA receives the BAR frame from the AP.

The BAR frame is used to request the STA to feed back a block acknowledgment frame (ie, a BA frame).

It should be noted that S310 and S320 are optional steps.

Case 1: The method 300 includes S310 and S320. That is, the AP may first send downlink data, and then request the STA to perform BA feedback on the downlink data by sending a BAR frame.

The second case: the method 300 may include S310 but not S320. That is, the AP can send downlink data without sending the BAR frame, and the STA can perform BA feedback after receiving the downlink data.

The third case: the AP may not send the downlink data, but send the BAR frame. Even if the STA does not receive the downlink data, as long as the BAR frame is received, it will perform BA feedback.

For example, OFDMA supports resource units (RUs) of different sizes. If the AP performs downlink transmission on two RUs with a size of 106 (referred to as RU106) respectively to the other two STAs, then the two RUs with a size of 106 A RU with a size of 26 (referred to as RU26) between RUs cannot be used to send downlink data to the STA. In this case, the RU26 can be used to send a BAR frame to the STA to request the STA to feed back the BA frame.

S330, the STA generates a BA frame.

Wherein, the BA frame includes a buffer status report (ie, BSR), and the BSR is used by the AP to allocate resources for transmitting uplink data to the STA.

It should be understood that if the STA also receives downlink data before S330, the BA frame further includes indication information, and the indication information is used to indicate whether the STA correctly receives the downlink data.

S340, the STA sends the BA frame to the AP. Accordingly, the AP receives the BA frame from the STA.

S350, the AP determines the resource for the STA to transmit uplink data according to the BSR in the BA frame.

Specifically, according to the BSR reported by the STA, the AP can know the size of the data buffered by the STA, so as to allocate resources for transmitting uplink data to the STA. For details on how the AP allocates resources for transmitting uplink data to the STA according to the BSR, reference may be made to the prior art.

S360, the AP sends resource scheduling information to the STA.

The resource scheduling information indicates the resource determined by the AP in S330.

It should be understood that the resource scheduling information may be carried in the trigger frame.

S370, the STA sends uplink data to the AP according to the resource scheduling information.

To sum up, according to the information transmission method provided by the embodiments of the present application, the STA can feed back the BSR through the BA frame, which can save the process of the AP querying the STA's cache information by using the BSRP frame, thereby saving the time overhead caused by the process. The scheduling efficiency is improved, which is conducive to the timely transmission of uplink data.

Optionally, the BA frame may further include the transmit power to be used by the STA to transmit uplink data. That is to say, in this last uplink transmission, the STA can use the transmission power to send uplink data.

In the current technology, the STA's uplink transmit power depends on the AP measurement algorithm. After the AP determines the STA's target transmit power, it can indicate it in the trigger frame, and then the STA adjusts the power by itself according to the target transmit power in the trigger frame. However, since the STA capability is unknown, the STA may not be able to adjust the target transmit power, which may cause uplink transmission failure.

However, in the solution provided by this embodiment of the present application, by carrying the transmit power to be used by the STA to send uplink data in the BA frame, the AP can adjust the transmit power of the STA to an appropriate receive power to receive the uplink data, thereby improving the success of uplink transmission. Rate.

Further, the BA frame may further include an adjustment margin of the transmit power, and the transmit power and the adjustment margin are used by the AP to determine the target transmit power of the STA.

The adjustment margin refers to a margin that the STA can adjust based on the transmit power. For example, if the transmit power is 200mW and the adjustment margin is 15mV, it means that the STA can transmit uplink data at a maximum transmit power of 215mW, that is, the transmit power of the STA ranges from 0 to 215mW.

After receiving the transmit power of the STA and the adjustment margin of the transmit power, the AP can configure the target transmit power of the STA for this uplink transmission, for example, in the trigger frame carrying the resource scheduling information in S360, configure the target of the STA for this uplink transmission transmit power. During this uplink transmission, the STA may use the target transmit power for uplink transmission, which is beneficial to improve the success rate of uplink transmission.

The BAR frame and the BA frame in the embodiments of the present application will be described in detail below.

1. BAR frame

The frame format of the existing BAR frame is shown in FIG. 4 .

Referring to Figure 4, the BAR frame includes the following fields:

Frame Control (Frame Control), Duration (Duration), Receiver Address (RA), Transmitter Address (TA), BAR Control (BAR Control), BAR Information (BAR Information), Frame Check Sequence ( Frame Check Sequence, FCS).

Among them, the BAR control field includes the following fields:

BAR Ack Policy (BAR Ack Policy), BAR Type (BAR Type), Reserved (Reserved), Traffic Identifier Information (Traffice Identifier Information, TID_INFO).

The BAR type field indicates the BAR type. In the prior art, the value in the BAR type field may be one of 0-10, each value represents a different BAR type, and 11-15 are reserved values.

In an implementation manner, if the AP sends the BAR frame, the STA may be instructed to feed back the BSR in the BA frame through the BAR type field.

For example, when the value of the BAR type field is 11, it indicates that the BAR frame is a BAR frame requesting the STA to feed back the BSR type. After the STA receives the BAR frame, if the value of the BAR type field in the BAR frame is 11, it feeds back the BSR in the BA frame. It should be understood that the value of the BAR type field of 11 indicates that the request for the STA to feed back the BSR is only an example, and it can also be specified that when the value of the BAR type field is a value from 12 to 15, it indicates that the STA is requested to feed back the BSR. It should also be understood that if the bits occupied by the BAR type field are extended to more than 4 bits, other reserved values may also be used to instruct the STA to feed back the BSR. For example, if the BAR type field is extended to 6 bits and 45-63 is not used, it can be specified that when the value of the BAR type field is a value of 45-63, the STA is requested to feed back the BSR.

Optionally, if the AP sends a BAR frame, the BAR type field can also instruct the STA to feed back the transmission power to be used by the STA to send uplink data in the BA frame, and further instruct the STA to feed back the transmission power in the BA frame. Adjust the margin.

For example, the same BAR type, that is, when the BAR type field takes a certain value, can instruct the STA to simultaneously feed back the BSR and the transmit power in the BA frame, or simultaneously feed back the BSR, the transmit power, and the adjustment margin of the transmit power.

For another example, when the BAR type field is a certain value, the STA is instructed to feed back the BSR in the BA frame; when the BAR type field is another value, the STA is instructed to simultaneously feed back the BSR and the transmit power in the BA frame, or feed back the BSR at the same time. , the transmission power, and the adjustment margin of the transmission power. For example, when the value of the BAR type field is 11, it instructs the STA to only feed back the BSR in the BA frame, and does not feed back the transmission power and adjustment margin; when the value of the BAR type field is 12, it instructs the STA to simultaneously feed back the BSR in the BA frame. BSR and the transmit power, or feedback the BSR, the transmit power and the adjustment margin of the transmit power at the same time; when the value of the BAR type field is 13, it instructs the STA to feed back only the transmit power or only the transmit power and the transmit power in the BA frame Adjustment headroom for power without feedback BSR.

In another implementation manner, if the AP sends the BAR frame, the STA may be instructed to feed back the BSR in the BA frame through the reserved field in the BAR control field in the BAR frame.

For example, one of the bits in the reserved field in the BAR control field may be used to instruct the STA to feed back the BSR in the BA frame. For example, the bit may be the highest or lowest bit in the reserved field, which is not limited in this embodiment of the present application. When the bit is 1, it indicates that the STA feeds back the BSR in the BA frame; when the bit is 0, it indicates that the STA does not need to feed back the BSR in the BA frame. Or the meanings of 0 and 1 can be reversed.

Optionally, if the AP sends a BAR, the reserved field can also instruct the STA to feed back the transmission power that the STA will use to send uplink data in the BA frame, and further instruct the STA to feed back the transmission power in the BA frame. Adjust the margin. That is, the reserved field may instruct the STA to simultaneously feed back the BSR and the transmit power in the BA frame, or simultaneously feed back the BSR, the transmit power, and an adjustment margin of the transmit power.

Taking the BAR frame shown in FIG. 4 as an example, the B5-B6 bits in the BAR control field (that is, the first two bits in the reserved field) can be used to instruct the STA to feed back the BSR in the BA frame or feed back the BSR at the same time. and the transmit power. The values and corresponding meanings of the bits B5-B6 may be shown in Table 1.

Table 1 Values and corresponding meanings of BAR control fields B5 and B6

B5B5	B6B6	描述(即，含义)description (ie, meaning)
00	00	不请求反馈BSR和发送功率No feedback on BSR and transmit power is requested
11	00	请求反馈BSRRequest Feedback BSR
00	11	请求反馈发送功率request feedback transmit power
11	11	请求反馈BSR和发送功率Request feedback on BSR and transmit power

Referring to Table 1, if the value of B5-B6 in the BAR control field in the BAR frame received by the STA is 10, the STA only feeds back the BSR in the BA frame, but does not feed back the transmission power and the adjustment margin of the transmission power ; If the value of B5-B6 is 11, the STA simultaneously feeds back the BSR and the transmit power in the BA frame, and can further feed back the adjustment margin of the transmit power.

In another implementation manner, the BAR type field and the reservation field may be used to jointly instruct the STA to feed back the BSR in the BA frame.

Optionally, the BAR type field and the reservation field may be used to jointly instruct the STA to simultaneously feed back the BSR and the transmit power in the BA frame.

For example, the STA may be instructed to feed back the BSR and/or the transmit power in the BA frame through the BAR type field. That is, according to the value in the BAR type field, the STA can know that one or both of the BSR and the transmit power need to be fed back, but it does not know whether to feed back the BSR, the transmit power, or both. At this time, the STA may be further instructed by the reserved field to specifically feed back which item of the BSR and the transmit power, or to feed back at the same time.

Still taking the BAR frame shown in FIG. 4 as an example, the B1-B6 bits in the BAR control field (that is, the first two bits in the BAR type field and the reserved field) can be used to instruct the STA to feed back in the BA frame The BSR or the BSR and the transmit power are fed back at the same time. The values and corresponding meanings of the bits B1-B6 may be shown in Table 2.

Table 2 Values and corresponding meanings of BAR control fields B1-B6

It should be understood that B1-B4 in the BAR control domain may also take other reserved values, such as 12 or 13.

It should be noted that, for the meanings of the fields or fields involved in FIG. 4 but not described in detail above, reference may be made to the prior art, which will not be described in detail herein.

It should be understood that the "domain" and "field" described in the embodiments of this application may be replaced with each other. In addition, the frame format of the BAR frame shown in FIG. 4 is only an example, and the BAR frame provided by the embodiment of the present application may also adopt a frame format different from that shown in FIG. 4 , such as the frame of the BAR frame provided by the embodiment of the present application. The format may also be a new frame format proposed as technology evolves.

2. BA frame

The frame format of the existing BA frame is shown in FIG. 5 .

Referring to Figure 5, the BA frame includes the following fields:

Frame Control, Duration, RA, TA, BA Control, BA Information, FCS.

Among them, the BAR control field includes the following fields:

BA Ack Policy, BA Type, Reserved, TID_INFO.

The BA type field indicates the BA type. In the prior art, the value in the BA type field may be one of 0-10, each value represents a different BA type, and 11-15 are reserved values. When the BA type field and the BAR type field take the same value, the meaning is the same.

1. About how to instruct BA frames to include BSR

In an implementation manner, the BA type field may indicate that the STA feeds back the BSR in the BA frame, that is, the BA frame includes the BSR.

For example, when the value of the BA type field is 11, it indicates that the BA frame includes a BSR. It should be understood that the value of 11 in the BA type field indicates that the BA frame includes the BSR is only an example, and it can also be specified that the value of the BA type field is a value from 12 to 15, indicating that the BA frame includes the BSR. It should also be understood that if the bits occupied by the BA type field are extended to more than 4 bits, other reserved values may also be used to indicate that the BA frame includes a BSR. For example, if the BA type field is extended to 6 bits and 45-63 is not used, it can be specified that the BA frame includes a BSR when the value of the BA type field is one of 45-63.

Optionally, the BA type field may also indicate that the BA frame includes the transmission power to be used for sending uplink data, and further may indicate that the BA frame includes an adjustment margin of the transmission power.

For example, the same BA type, that is, when the BA type field takes a certain value, can indicate that the STA simultaneously feeds back the BSR and the transmit power in the BA frame, or simultaneously feeds back the BSR, the transmit power, and the adjustment margin of the transmit power .

For another example, when the BA type field is a certain value, it indicates that the STA has fed back the BSR in the BA frame; when the BA type field is another value, it indicates that the STA has fed back the BSR and the transmit power simultaneously in the BA frame, or at the same time. The BSR, the transmission power, and the adjustment margin of the transmission power are fed back. For example, when the value of the BA type field is 11, it indicates that the STA has fed back the BSR in the BA frame, but not the transmission power and adjustment margin; when the value of the BA type field is 12, it indicates that the STA has fed back the BSR in the BA frame at the same time. The BSR and the transmit power are fed back, or the BSR, the transmit power, and the adjustment margin of the transmit power are fed back at the same time; when the value of the BA type field is 13, it indicates that the STA only fed back the transmit power or only fed back the transmit power in the BA frame. The transmission power and the adjustment margin of the transmission power are not fed back.

It should be understood that if the AP sends a BAR frame, the value of the BAR type field in the BAR frame and the value of the BA type field in the BA frame may be the same. That is, the AP indicates what kind of information the STA feeds back through the BAR, and the STA feeds back the information indicated by the AP in the BA frame.

In another implementation manner, the reserved field in the BA control field in the BA frame may be used to indicate that the STA has fed back the BSR in the BA frame.

For example, one of the bits in the reserved field in the BA control field may be used to indicate that the STA has fed back the BSR in the BA frame. For example, the bit may be the highest or lowest bit in the reserved field, which is not limited in this embodiment of the present application. When the bit is 1, it indicates that the STA has fed back the BSR in the BA frame; when the bit is 0, it indicates that the STA has not fed back the BSR in the BA frame. Or the meanings of 0 and 1 can be reversed.

It should be understood that if the AP sends a BAR frame, and the reservation field in the BAR control field in the BAR frame indicates that the STA feeds back the BSR in the BA frame, the STA may indicate in the reservation field in the BA control field in the BA frame The STA feeds back the BSR in the BA frame. For example, the highest bit of the reserved field in the BAR control field indicates that the STA feeds back the BSR in the BA frame, then the highest bit of the reserved field in the BA control field can indicate that the STA feeds back the BSR in the BA frame, and the two The values of the most significant bits can be the same.

Optionally, the reserved field in the BA control field can also be used to instruct the STA to feed back the transmission power to be used by the STA to send uplink data in the BA frame, and further instruct the STA to feed back the adjustment of the transmission power in the BA frame. margin. That is, the reserved field may indicate that the STA has simultaneously fed back the BSR and the transmit power in the BA frame, or simultaneously fed back the BSR, the transmit power, and the adjustment margin of the transmit power.

Taking the BA frame shown in FIG. 5 as an example, the B5-B6 bits in the BA control field (that is, the first two bits in the reserved field) can be used to indicate that the STA has fed back the BSR in the BA frame or fed back at the same time. the BSR and the transmit power. The values and corresponding meanings of the bits B5-B6 may be shown in Table 3.

Table 3 Values of BA control fields B5 and B6 and their corresponding meanings

B5B5	B6B6	描述(即，含义)description (ie, meaning)
00	00	没有反馈BSR和发送功率No feedback BSR and transmit power
11	00	反馈了BSRFeedback on BSR
00	11	反馈了发送功率The transmit power is fed back
11	11	反馈了BSR和发送功率Feedback of BSR and transmit power

As another example of the embodiment of the present application, the BA type field and the reservation field may be used to jointly indicate that the STA has fed back the BSR in the BA frame.

Further, the BA type field and the reservation field may be used to jointly indicate that the STA has fed back the BSR and the transmit power simultaneously in the BA frame.

For example, the BA type field may indicate that the STA has fed back the BSR and/or the transmit power in the BA frame. That is, according to the value in the BA type field, the AP can learn that the STA has fed back one or both of the BSR and the transmit power, but does not know whether to feed back the BSR, the transmit power, or both. At this time, the reserved field may further indicate which item of the BSR and the transmit power is specifically fed back by the STA, or fed back at the same time.

Still taking the BA frame shown in FIG. 5 as an example, the B1-B6 bits in the BA control field (that is, the first two bits in the BA type field and the reserved field) can be used to instruct the STA to feed back in the BA frame The BSR or the BSR and the transmit power are fed back at the same time. The values and corresponding meanings of the bits B1-B6 may be shown in Table 4.

Table 4 Values and corresponding meanings of BA control fields B1-B6

It should be understood that B1-B4 in the BA control domain can also take other reserved values, such as 12 or 13.

It should be noted that, for the meanings of the fields or fields involved in FIG. 5 but not described in detail above, reference may be made to the prior art, which will not be described in detail herein.

It should be understood that the frame format of the BA frame shown in FIG. 5 is only an example, and the BA frame provided by the embodiment of the present application may also adopt a frame format different from that shown in FIG. 5 , such as the BA frame provided by the embodiment of the present application. The frame format may also be a new frame format proposed as technology evolves.

2. About how to carry BSR in BA frame

In an implementation manner, the STA may feed back the BSR through the BSR field in the BA frame, that is, the BSR field in the BA frame includes the BSR.

For example, referring to FIG. 6 , a BSR field can be added to the existing BA frame, and the BSR field can carry the BSR.

It should be understood that the embodiments of the present application do not limit the bits occupied by the BSR field. The embodiment of the present application also does not limit the position of the BSR field in the BA frame. For example, as shown in FIG. 6 , the BSR field is immediately after the BA information field, or the BSR field can also be in other positions, such as immediately after the BA control field.

It should also be understood that the "BSR" domain in this document is only an exemplary name, and the domain carrying the BSR may also have other names.

Optionally, the STA may feed back the transmit power through the transmit power field in the BA frame, that is, the transmit power field in the BA frame includes the transmit power.

Further, the STA may feed back the adjustment margin of the transmit power through an adjustment margin (Power adj Capability) field in the BA frame.

For example, referring to FIG. 6 , a transmit power (STA Tx Power) field may be added to the existing BA frame or the BA frame to which the BSR field has been added, and the transmit power field may carry the transmit power. Further, an adjustment headroom field may be added, and the adjustment headroom field carries the adjustment headroom of the transmit power.

For example, the transmit power field may occupy 1 byte, and the indicated transmit power is: 10*n(mW), where n is the value of the transmit power field, and the value range of n is 0-255. For another example, the adjustment margin field may occupy 1 byte, and the indicated adjustment margin is: 10*m(mW), where m is the value of the adjustment margin field, and the value range of m is 0-255.

It should be understood that the embodiments of the present application do not limit the bits occupied by the transmit power field and the adjustment margin field. This embodiment of the present application also does not limit the positions of the transmit power domain and the adjustment margin domain in the BA frame. For example, as shown in FIG. 6 , the transmit power domain is immediately after the BSR domain, the adjustment margin domain is immediately after the transmit power domain, or the transmission The power domain and adjustment margin domain can also be in other positions, such as the transmit power domain can be immediately after the BA control domain.

It should also be understood that the "transmission power" field and the "adjustment headroom" field herein are only exemplary names, and the fields carrying the transmission power and adjustment headroom may also have other names. Furthermore, it is also possible to carry the transmit power and the adjustment margin in one domain.

In another implementation manner, the STA may feed back the BSR through the reserved field in the BA control field in the BA frame, that is, the reserved field in the BA control field in the BA frame includes the BSR.

That is, the BSR may be carried through some or all of the bits in the reserved field in the BA control field. If a part of bits in the BA control field has been used to indicate that the STA has fed back the BSR through the BA, part or all of the remaining bits in the BA control field may be used to indicate that the reserved field in the BA control field in the BA frame includes: BSR.

For example, the BSR can be carried through B5-B11 in the reserved field in the BA control domain. For example, the range of BSR indicated by 7 bits of B5-B11 may be 0-10MB, wherein 0-10KB, the resolution is 1KB; 20KB-100KB, the resolution is 10KB; 200KB-1MB, the resolution is 100KB; 2MB- 10MB with a resolution of 1MB.

Optionally, the STA may also feed back the transmit power, or feed back the transmit power and the adjustment margin through the reserved field in the BA control field in the BA frame.

For example, the transmit power can be carried by B5-B11 in the reserved field in the BA control field. For example, the range of transmit power indicated by a total of 7 bits of B5-B11 may be 0-31.75dBm, wherein the resolution is 0.25dBm. For example, if BSR and transmit power need to be fed back at the same time, B5-B8 can be used to carry BSR, and B9-B11 can be used to carry transmit power. For example, the BSR range indicated by 4 bits of B5-B8 may be 0-10MB, wherein, 0-10KB, the resolution is 2.5KB; 25KB-100KB, the resolution is 25KB; 500KB-1MB, the resolution is 500KB; 2M -10MB with 2MB resolution. The range of transmit power indicated by a total of 3 bits of B9-B11 may be 0-28dBm, wherein 0-4dBm, the resolution is 2dBm, and 8-28dBm, wherein the resolution is 5dBm.

It should be understood that the above examples are only for those skilled in the art to better understand the embodiments of the present application, and these examples should not constitute any limitation to the embodiments of the present application.

FIG. 7 is a schematic flowchart of another information transmission method provided by an embodiment of the present application. Each step of the method 700 shown in FIG. 7 will be described below.

S710-S720, the same as S310-S320, can refer to S310-S320.

It should be understood that, same as S310-S320, S710-S720 are optional steps.

S730, the STA generates a BA frame.

The BA frame includes the transmit power to be used by the STA to transmit uplink data. Optionally, the BA frame may further include an adjustment margin of the transmission power.

For the meanings of the transmission power and the adjustment margin, reference may be made to the foregoing description, which will not be repeated here.

S740, the STA sends the BA frame to the AP. Accordingly, the AP receives the BA frame from the STA.

In one manner, after receiving the BA frame, the AP may determine the receive power according to the transmit power in the BA frame, and then use the receive power to receive uplink data sent by the STA subsequently.

In another way, after the AP receives the BA frame, the method may further include the following steps:

S750, the AP determines the target transmit power of the STA according to the transmit power and the adjustment margin.

S760, the AP sends the target transmit power to the STA. Accordingly, the STA receives the target transmit power from the AP.

For example, the AP may carry the target transmit power in the trigger frame.

S770, the STA uses the target transmit power to transmit uplink data to the AP.

It should be understood that with regard to how the BAR frame instructs the STA to feed back the transmit power, or feed back the transmit power and adjustment margin, and how to carry the transmit power in the BA, or feed back the transmit power and the adjustment margin, you can refer to the foregoing description, which will not be repeated here. .

It should be understood that various solutions in the embodiments of the present application may be used in a reasonable combination, and the explanations or descriptions of various terms appearing in the embodiments may be referred to or explained in each embodiment, which is not limited.

It should also be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and inherent logic. The various numerical numbers or serial numbers involved in the above processes are only for the convenience of description, and should not constitute any limitation on the implementation process of the embodiments of the present application.

In the above, the methods provided by the embodiments of the present application are described in detail with reference to FIG. 2 to FIG. 7 . Hereinafter, the apparatus provided by the embodiments of the present application will be described in detail with reference to FIG. 8 to FIG. 10 .

FIG. 8 is a schematic block diagram of a communication apparatus provided by an embodiment of the present application. As shown in FIG. 8 , the communication apparatus 1000 may include a transceiver unit 1100 and a processing unit 1200 .

The transceiving unit 1100 may include a transmitting unit and/or a receiving unit. The transceiver unit 1100 may be a transceiver (including a transmitter and/or a receiver), an input/output interface (including an input and/or output interface), a pin or a circuit, and the like. The transceiver unit 1100 may be configured to perform the sending and/or receiving steps in the above method embodiments.

The processing unit 1200 may be a processor (which may include one or more), a processing circuit with a processor function, and the like, and may be used to perform other steps in the foregoing method embodiments except for sending and receiving.

Optionally, the communication device may further include a storage unit, which may be a memory, an internal storage unit (eg, a register, a cache, etc.), an external storage unit (eg, a read-only memory, a random access memory, etc.), etc. . The storage unit is used for storing instructions, and the processing unit 1200 executes the instructions stored in the storage unit, so that the communication device executes the above method.

In one design, the communication apparatus 1000 may correspond to the STA in the foregoing method embodiment, and may perform the operations performed by the STA in the foregoing method.

Under this design, in an example, the communication apparatus 1000 may correspond to the STA of the method 300 , and may perform the steps involved in the method 300 .

Specifically, the processing unit 1200 is configured to generate a block acknowledgment frame, where the block acknowledgment frame includes a buffer status report of the communication device 1000 , and the buffer status report is used by the access point AP to allocate a transmission uplink for the communication device 1000 data resources; the transceiver unit 1100 sends the block acknowledgment frame to the AP.

Optionally, the block ack type field in the block ack control field in the block ack frame indicates that the block ack frame includes the buffer status report.

Optionally, the buffer status report field in the block ack frame includes the buffer status report; or, the reserved field in the block ack control field in the block ack frame includes the buffer status report.

Optionally, the transceiver unit 1100 is further configured to: receive downlink data from the AP.

Optionally, the transceiver unit 1100 is further configured to: receive a block ack request frame from the AP, where the block ack request frame instructs the communication apparatus 1000 to feed back the buffer status report.

Optionally, the block ack request type field in the block ack request control field in the block ack request frame instructs the communication apparatus 1000 to feed back the cache status report; or, the block ack request in the block ack request frame The reserved field in the control field instructs the communication apparatus 1000 to feed back the buffer status report; or, the block ack request type field and the reserved field jointly instruct the communication apparatus 1000 to feed back the buffer status report.

Under this design, in another example, the communication device 1000 may correspond to the STA of the method 700 , and may perform the steps involved in the method 700 .

Specifically, the processing unit 1200 is configured to generate a block acknowledgment frame, where the block acknowledgment frame includes information about the transmit power to be used by the communication device 1000 to send uplink data; the transceiver unit 1200 is configured to send the block acknowledgment to the access point AP frame.

Optionally, the block acknowledgment frame further includes an adjustment margin of the transmission power, and the transmission power and the adjustment margin are used by the AP to determine the target transmission power of the communication apparatus 1000 .

In another design, the communication device 1000 may correspond to the AP in the above method embodiment, and may perform the operations performed by the AP in the above method.

Under this design, in an example, the communication device 1000 may correspond to the AP of the method 300 , and may perform the steps involved in the method 300 .

Specifically, the transceiver unit 1100 is configured to receive a block acknowledgment frame from a station STA, where the block acknowledgment frame includes a buffer status report of the STA; the processing unit 1200 is configured to determine the STA to transmit according to the buffer status report Resource of uplink data; the transceiver unit 1100 is further configured to send resource scheduling information to the STA, where the resource scheduling information indicates the resource.

Optionally, the transceiver unit 1100 is further configured to: send downlink data to the STA.

Optionally, the transceiving unit 1100 is further configured to: send a block ack request frame to the STA, where the block ack request frame instructs the STA to feed back the buffer status report.

Optionally, the block ack request type field in the block ack request control field in the block ack request frame instructs the STA to feed back the buffer status report; or, the block ack request control field in the block ack request frame The reserved field in instructs the STA to feed back the buffer status report; or, the block ack request type field and the reserved field jointly instruct the STA to feed back the buffer status report

Under this design, in another example, the communication device 1000 may correspond to the AP of the method 700 , and may perform the steps involved in the method 700 .

Specifically, the transceiver unit 1100 is configured to receive a block acknowledgment frame from the STA, where the block acknowledgment frame includes information about the transmission power to be used by the STA to send uplink data.

It should be understood that the above division of each unit is only functional division, and other division methods may be used in actual implementation.

It should also be understood that the above processing unit may be implemented by hardware or software, or may be implemented by a combination of software and hardware.

FIG. 9 is a schematic structural diagram of a communication device provided by the present application. As shown in FIG. 9 , the communication apparatus 2000 can be applied to the communication system shown in FIG. 1 to perform the functions of the AP in the foregoing method embodiments.

Communication device 2000 may include processor 2001 . The processor 2001 may also be referred to as a processing unit, and may implement certain control functions. The processor 2001 can be used to control the communication device 2000, execute software programs, and process data of the software programs.

In an optional design, the processor 2001 may also store instructions and/or data, and the instructions and/or data may be executed by the processor 2001, so that the communication apparatus 2000 performs the above method embodiments method described.

Optionally, the communication apparatus 2000 may include a memory 2002, on which instructions may be stored, and the instructions may be executed on the processor, so that the communication apparatus 2000 executes the methods described in the above method embodiments . Optionally, data may also be stored in the memory. Optionally, instructions and/or data may also be stored in the processor. The processor and the memory can be provided separately or integrated together. For example, the corresponding relationship described in the above method embodiments may be stored in a memory or in a processor.

Optionally, the communication apparatus 2000 may include a baseband circuit 2003, which is mainly used for baseband processing.

Optionally, the communication apparatus 2000 may include a radio frequency circuit 2004, which is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals to baseband signals, for example, for sending the BAR frames in the above method embodiments. The radio frequency circuit 2004 may also be referred to as a transceiver unit, a transceiver, a transceiver circuit, a transceiver, or the like.

Optionally, the communication apparatus 2000 may include an antenna 2005, which is mainly used for signal transmission and reception.

Optionally, the communication apparatus 2000 may include a bus 2006 for connecting various parts of the communication apparatus 2000, such as the above-mentioned processor 2001, memory 2002, baseband circuit 2003, radio frequency circuit 2004 and antenna 2005.

FIG. 10 is a schematic structural diagram of a communication apparatus 3000 provided by the present application. For convenience of explanation, FIG. 10 only shows the main components of the communication device 3000 . The communication apparatus 3000 can be applied to the communication system as shown in FIG. 1 to perform the functions of the STA in the foregoing method embodiments.

As shown in FIG. 10 , the communication device 3000 includes a processor, a memory, a control circuit, an antenna, and an input and output device.

The processor is mainly used to process communication protocols and communication data, control the entire communication device 3000, execute software programs, and process data of the software programs, for example, to support the communication device 3000 to execute the STA described in the above method embodiments the operation performed. The memory is mainly used to store software programs and data. The control circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. The control circuit together with the antenna can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.

After the communication device 3000 is powered on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves. When data is sent to the communication device 3000, 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, which converts the baseband signal into data and processes the data .

It can be understood by those skilled in the art that, for the convenience of description, FIG. 10 only shows one memory and a processor. In an actual communication device 3000, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in this embodiment of the present application.

As an optional implementation manner, the processor may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data, and the central processing unit is mainly used to control the entire communication device 3000. The software program is executed, and the data of the software program is processed. The processor in FIG. 10 integrates the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit may also be independent processors, interconnected by technologies such as a bus. Those skilled in the art can understand that the communication device 3000 may include multiple baseband processors to adapt to different network standards, the communication device 3000 may include multiple central processors to enhance its processing capability, and the various components of the communication device 3000 may use various bus connection. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

Exemplarily, in this embodiment of the present application, an antenna and a control circuit with a transceiver function may be regarded as the transceiver unit 3001 of the communication apparatus 3000 , and a processor with a processing function may be regarded as the processing unit 3002 of the communication apparatus 3000 . As shown in FIG. 300 , the communication apparatus 3000 includes a transceiver unit 3001 and a processing unit 3002 . The transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, or the like. Optionally, the device for implementing the receiving function in the transceiver unit 3001 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 3001 may be regarded as a transmitting unit, that is, the transceiver unit 3001 includes a receiving unit and a transmitting unit. Exemplarily, the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, and the like, and the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.

It should be noted that the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable circuits. Programming logic devices, discrete gate or transistor logic devices, discrete hardware components, may also be a system on chip (SoC), a central processor unit (CPU), or a network processor (network processor). processor, NP), can also be a microcontroller (micro controller unit, MCU), can also be a programmable logic device (programmable logic device, PLD) or other integrated chips. It can be understood that the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory (RAM), which acts as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

According to the method provided by the embodiment of the present application, the present application also provides a computer program product, the computer program product includes: computer program code, when the computer program code is run on a computer, the computer executes any of the foregoing methods to implement The method on the STA side or the AP side in the example.

According to the method provided by the embodiments of the present application, the present application further provides a computer-readable medium, where the computer-readable medium stores program codes, when the program codes are executed on a computer, the computer is made to execute the foregoing method embodiments. STA side or AP side method.

According to the method provided by the embodiments of the present application, the present application further provides a system, which includes the aforementioned one or more APs and one or more STAs.

An embodiment of the present application further provides a processing apparatus, including a processor and an interface, where the processor is configured to execute the method in any of the foregoing method embodiments.

It should be understood that the above processing device may be a chip. In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes an integration of one or more available media. The available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, high-density digital video discs (DVDs)), or semiconductor media (eg, solid state discs, SSD)) etc.

The terms "component", "unit", "system" and the like are used in this specification to refer to a computer-related entity, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, or a computer. By way of illustration, both an application running on a computing device and the computing device may be components. One or more components may reside within a process or thread of execution, and a component may be localized on one computer or distributed among 2 or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. A component may, for example, pass a signal through a local system based on a signal having one or more data packets (such as data from two components interacting with another component between a local system, a distributed system, or a network, such as the Internet interacting with other systems through signals). or remote process to communicate.

It is to be understood that reference throughout the specification to an "embodiment" means that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Thus, various embodiments throughout this specification are not necessarily necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

It should also be understood that in this application, "when", "if" and "if" all mean that the network element will make corresponding processing under certain objective circumstances, not a limited time, and does not require the network element There must be a judgmental action during implementation, and it does not mean that there are other restrictions.

It should also be understood that, in this application, "at least one" refers to one or more, and "a plurality" refers to two or more.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a removable hard disk, a read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk and other media that can store program codes.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

An information transmission method, comprising:

The station STA generates a block acknowledgment BA frame, the BA frame includes a buffer status report of the STA, and the buffer status report is used by the access point AP to allocate resources for transmitting uplink data to the STA;

The STA sends the BA frame to the AP.
The method of claim 1, wherein a BA type field in a BA control field in the BA frame indicates that the BA frame includes the buffer status report.
The method according to claim 1 or 2, wherein the buffer status report field in the BA frame includes the buffer status report; or,

The reserved field in the BA control field in the BA frame includes the buffer status report.
The method according to any one of claims 1 to 3, wherein before the STA generates a BA frame, the method further comprises:

The STA receives downlink data from the AP.
The method according to any one of claims 1 to 4, wherein before the STA generates a BA frame, the method further comprises:

The STA receives a Block Ack Request BAR frame from the AP, the BAR frame instructs the STA to feed back the buffer status report.
The method of claim 5, wherein the BAR type field in the BAR control field in the BAR frame instructs the STA to feed back the buffer status report; or,

The reserved field in the BAR control field in the BAR frame instructs the STA to feed back the buffer status report; or,

The BAR type field and the reservation field jointly instruct the STA to feed back the buffer status report.
The method of claim 1, wherein the BA frame further includes a transmit power to be used by the STA to transmit the uplink data.
The method of claim 7, wherein the BA frame further includes an adjustment margin of the transmit power, and the transmit power and the adjustment margin are used by the AP to determine the target transmission of the STA power.
The method of claim 7 or 8, wherein the BA type field in the BA control field in the BA frame indicates that the BA frame includes the transmit power.
The method according to any one of claims 7 to 9, wherein the transmit power field in the BA frame includes the transmit power; or,

The reserved field in the BA control field in the BA frame includes the transmit power.
The method according to any one of claims 7 to 10, wherein before the STA generates a BA frame, the method further comprises:

The STA receives downlink data from the AP.
The method according to any one of claims 7 to 10, wherein before the STA generates a BA frame, the method further comprises:

The STA receives a Block Ack Request BAR frame from the AP, the BAR frame instructing the STA to feed back the transmit power.
The method of claim 12, wherein a BAR type field in a BAR control field in the BAR frame instructs the STA to feed back the transmit power; or,

The reserved field in the BAR control field in the BAR frame instructs the STA to feed back the transmit power information; or,

The BAR type field and the reservation field jointly instruct the STA to feed back the transmit power.
An information transmission method, comprising:

The access point AP receives the block acknowledgment BA frame from the station STA, and the BA frame includes the buffer status report of the STA;

The AP determines, according to the buffer status report, the resource for the STA to transmit uplink data;

The AP sends resource scheduling information to the STA, where the resource scheduling information indicates the resource.
15. The method of claim 14, wherein a BA type field in a BA control field in the BA frame indicates that the BA frame includes the buffer status report.
The method according to claim 14 or 15, wherein the buffer status report field in the BA frame includes the buffer status report; or,

The reserved field in the BA control field in the BA frame includes the buffer status report.
The method according to any one of claims 14 to 16, wherein before the AP receives the BA frame from the STA, the method further comprises:

The AP sends downlink data to the STA.
The method according to any one of claims 14 to 17, wherein before the AP receives the BA frame from the STA, the method further comprises:

The AP sends a Block Ack Request BAR frame to the STA, and the BAR frame instructs the STA to feed back the buffer status report.
A communication device, comprising:

a processing unit, configured to generate a block acknowledgment BA frame, where the BA frame includes a buffer status report of the device, and the buffer status report is used by the access point AP to allocate resources for transmitting uplink data to the device;

A transceiver unit, configured to send the BA frame to the AP.
20. The apparatus of claim 19, wherein a BA type field in a BA control field in the BA frame indicates that the BA frame includes the buffer status report.
The apparatus according to claim 19 or 20, wherein the buffer status report field in the BA frame includes the buffer status report; or,

The reserved field in the BA control field in the BA frame includes the buffer status report.
The device according to any one of claims 19 to 21, wherein the transceiver unit is further configured to:

Receive downlink data from the AP.
The device according to any one of claims 19 to 22, wherein the transceiver unit is further configured to:

A Block Ack Request BAR frame is received from the AP, the BAR frame instructing the device to feed back the buffer status report.
A communication device, characterized in that it includes:

a transceiver unit, configured to receive a block acknowledgment BA frame from a station STA, where the BA frame includes a buffer status report of the STA;

a processing unit, configured to determine the resource for the STA to transmit uplink data according to the buffer status report;

The transceiver unit is further configured to send resource scheduling information to the STA, where the resource scheduling information indicates the resource.