WO2024027494A1 - 发射功率调整方法 - Google Patents

发射功率调整方法 Download PDF

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Publication number
WO2024027494A1
WO2024027494A1 PCT/CN2023/107740 CN2023107740W WO2024027494A1 WO 2024027494 A1 WO2024027494 A1 WO 2024027494A1 CN 2023107740 W CN2023107740 W CN 2023107740W WO 2024027494 A1 WO2024027494 A1 WO 2024027494A1
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WIPO (PCT)
Prior art keywords
transmit power
frame
tpc
control field
report
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PCT/CN2023/107740
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English (en)
French (fr)
Inventor
童娣
李宛苡
Original Assignee
联洲集团有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN202210933105.7A external-priority patent/CN115474264A/zh
Priority claimed from CN202210932018.XA external-priority patent/CN115413007A/zh
Application filed by 联洲集团有限公司 filed Critical 联洲集团有限公司
Publication of WO2024027494A1 publication Critical patent/WO2024027494A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms

Definitions

  • the present disclosure belongs to the field of communication technology, and in particular relates to a transmission power adjustment method and a computer-readable storage medium.
  • Transmit power control (TPC) in the WiFi 5G band is a technology used to adjust the transmit power of wireless network devices. Its purpose is to ensure the quality and stability of communication between devices while avoiding interference to other devices or the surrounding environment. TPC technology dynamically adjusts the transmit power of the device by measuring factors such as signal quality and environmental noise to keep the signal quality within an acceptable range.
  • the current TPC solution will cause the STA to be unable to report TPC information in a timely manner.
  • the AP can only request TPC information from one STA at a time, and the acquisition efficiency of TPC information is low. Therefore, existing transmission power control needs to be improved.
  • an embodiment of the present disclosure provides a transmission power adjustment method, including: in response to contention for a channel, sending a target frame including a Transmit Power Control (TPC) report control field, wherein the target frame is a QoS Data frame Any one of , QoS Null frames and management frames, the TPC report control field indicates the first transmission power for sending the target frame; and receiving a MAC layer protocol data unit (MPDU), wherein the second transmission power of the MPDU is transmitted The transmit power is based at least in part on the first transmit power.
  • TPC Transmit Power Control
  • MPDU MAC layer protocol data unit
  • embodiments of the present disclosure provide a transmission power adjustment method, including: sending any of a basic trigger frame, a buffer status report polling trigger frame, a beamforming report polling trigger frame, and a bandwidth query report polling trigger frame.
  • One item receiving a response frame including a TPC report control field indicating a first transmit power at which the response frame is sent; and transmitting at a second transmit power MPDU is transmitted, the second transmit power is based at least in part on the first transmit power.
  • embodiments of the present disclosure provide a transmission power adjustment method, including: sending a TPC report polling trigger frame, the TPC report polling trigger frame being used to trigger multiple STAs to report TPC report information; receiving multiple STAs including: a TPC report control field of the response frame indicating a first transmission power at which the response frame is transmitted; and transmitting the MPDU at a second transmission power based at least in part on the first transmission power.
  • embodiments of the present disclosure provide a computer-readable storage medium.
  • the computer-readable storage medium stores a computer program.
  • the computer program is executed by a processor, the steps of any of the above smart antenna scheduling methods are implemented.
  • Embodiments of the present disclosure propose an unsolicited TPC reporting mechanism.
  • the AP or STA can automatically report TPC information in a timely manner, and then adaptively adjust the transmit power.
  • the embodiments of the present disclosure can also be applied to scenarios where an AP requests TPC information from multiple STAs at the same time, thus avoiding unnecessary consumption of links.
  • Figure 1 is a flow chart of a transmission power adjustment method provided according to an embodiment of the present disclosure.
  • FIG. 2 is a schematic structural diagram of a TPC report control field provided by an embodiment of the present disclosure.
  • Figure 3 is a flow chart of yet another transmission power adjustment method provided according to an embodiment of the present disclosure.
  • FIG. 4A is a flowchart of yet another transmission power adjustment method provided according to an embodiment of the present disclosure.
  • FIG. 4B is a schematic structural diagram of a TPC report polling trigger frame according to an embodiment of the present disclosure.
  • Figure 5 is an implementation flow chart of a transmission power adjustment method according to an embodiment of the present disclosure.
  • Figure 6 is an implementation flow chart of a transmission power adjustment method provided according to an embodiment of the present disclosure.
  • Figure 7 is another implementation flow chart of a transmission power adjustment method provided according to an embodiment of the present disclosure.
  • Figure 8 is an implementation flow chart of a transmission power adjustment method according to an embodiment of the present disclosure.
  • Figure 9 is a schematic diagram of an implementation of a transmission power adjustment method according to an embodiment of the present disclosure.
  • Figure 10 is a schematic diagram of a terminal provided by an embodiment of the present disclosure.
  • the size of the sequence numbers of each process does not mean the order of execution.
  • the execution order of each process should be determined by its functions and internal logic, and should not be determined by the execution order of the embodiments of the present disclosure.
  • the implementation process constitutes no limitation.
  • pluriality means two or more.
  • “And/or” is just an association relationship that describes related objects, indicating that three relationships can exist.
  • B can mean: A alone exists, A and B exist simultaneously, and B alone exists. .
  • the character “/” generally indicates that the related objects are in an “or” relationship.
  • “Includes A, B and C” and “includes A, B, C” means that it includes all three of A, B and C
  • “includes A, B or C” means that it includes one of A, B and C.
  • “Including A, B and/or C” means including any one, any two or three of A, B and C.
  • B corresponding to A means that B is associated with A, according to A B can be determined. Determining B based on A does not mean determining B only based on A, but can also determine B based on A and/or other information.
  • the matching between A and B means that the similarity between A and B is greater than or equal to the preset threshold.
  • TPC transmit power control
  • the TPC function requires that the transmitter's transmit power be controlled so that the transmitter's transmit power meets the maximum transmit power limits stipulated in the regulatory domain and the local maximum transmit power constraints.
  • the transmit power used by the STA should be less than or equal to the local maximum transmit power level of the channel, and the transmit power of the AP should be less than or equal to the regulatory maximum transmit power level of the channel and meet any regulatory mitigation requirements.
  • the device After determining the regulatory maximum transmit power of the current channel and the local maximum transmit power of the current channel, the device should perform spectrum management operations, including transmit power control and other services, as required. These operations are designed to ensure the compliance and stability of the device on the 5GHz band.
  • the AP generally makes a TPC report request to the STA to obtain the STA's TPC information, and then uses the TPC information to dynamically adjust the transmit power of the MPDU for message transmission to the STA.
  • the STA may not be able to report the TPC information in a timely manner, causing the problem of being unable to adjust the MPDU transmit power for message transmission to the STA.
  • the AP can usually only send a TPC request frame or a link measurement request frame to one STA at a time to obtain the TPC information of the STA. This solution is not suitable for scenarios where an AP requests TPC information from multiple STAs at the same time.
  • the current transmission mechanism of TPC information is improved, thereby enabling the AP or STA to report TPC information more timely and proactively, thereby automatically Adjust transmit power adaptively.
  • Figure 1 is a flow chart of a transmission power adjustment method provided according to an embodiment of the present disclosure.
  • Figure 2 is a schematic structural diagram of a TPC report control field provided by an embodiment of the present disclosure.
  • a transmission power adjustment method 1000 is provided.
  • the execution subject of method 1000 can be either an AP (Access Point) or an STA.
  • AP Access Point
  • AP is a wireless network device used to convert wired network connections into wireless signals, allowing wireless devices to Can connect to the network.
  • APs can provide wireless network coverage, allowing multiple wireless devices to connect to the network at the same time (e.g., WIFI network).
  • AP is the creator of a wireless network and the central node of the network.
  • the wireless router used in homes or offices is an AP.
  • the method 100 includes the following operations S1001 to S1002.
  • a target frame including a TPC report control field, wherein the target frame is any one of a QoS Data frame, a QoS Null frame, and a management frame, and the TPC report control field Indicates the first transmit power for sending the target frame.
  • the AP may compete for the channel through EDCA (Enhanced Distribution Channel Access).
  • EDCA is a wireless local area network (WLAN) protocol used to regulate channel access between multiple wireless devices.
  • WLAN wireless local area network
  • each wireless device is assigned a priority, and its right to access the channel is determined based on its priority.
  • the process of competing for a channel means that when a device wants to send data, it will check whether the channel is available. If the channel is idle, the device will perform a random backoff process to gain access to the channel.
  • devices with higher priority will have a greater probability of obtaining channel access to ensure the priority of their data transmission.
  • the present disclosure is not limited to this.
  • the AP may further determine whether it needs to actively send TPC report information to the STA.
  • STA is each terminal connected to the wireless network (such as laptops, PADs and other user devices that can connect to the Internet), and can also be called a site.
  • the AP may determine whether it needs to send TPC report information to the STA through the target frame based on whether the preset time is reached.
  • the preset time refers to the time for reporting TPC information, and this preset time can be set according to specific needs. If TPC information needs to be reported at 12:00 and 16:00 every day, set the preset time to 12:00 and 16:00.
  • the next reporting time can be set to be 30 minutes longer than the previous reporting time.
  • the AP may determine whether it needs to send TPC report information to the STA through a target frame based on whether the link condition changes. If the AP determines that the link has changed, it can send TPC report information to the STA through the target frame.
  • the present disclosure is not limited to this.
  • the first transmit power is the transmit power of the AP.
  • An example of the TPC report control field can be shown in Figure 2.
  • the TPC report control field includes control ID and TPC report information.
  • the TPC report information includes the first transmit power (the transmit power in FIG. 2 is, for example, represented by 8 bits) and the link margin information (for example, is represented by 8 bits).
  • the control ID indicates that this field is a TPC report control field.
  • the transmit power field is set to the transmit power for transmitting the target frame. Rate.
  • the link margin field indicates the link margin for the reception time and reception rate of the frame containing the TPC report request.
  • the TPC report control field is mainly used to indicate TPC report information
  • the link margin information may also be a reserved field, so that the first transmit power is reported only through the TPC report control field.
  • the present disclosure is not limited to this.
  • the TPC report control field exists in the target frame, that is, in the QoS data frame (Qos Data frame), QoS null frame (Qos Null frame) and management frame.
  • QoS data frames and QoS empty frames are both data frames.
  • the data frame is responsible for transporting data, and it places the data of the upper layer protocol in the frame body for transmission.
  • Both the QoS data frame and the QoS null frame include a frame control field, a duration field, an address field and a sequence control field, and the QOS subfield in the subtype field of the frame control field of the QoS data frame and the QoS null frame indicates that the data frame exists QOS control field.
  • Management frames are usually responsible for supervision and are mainly used to join or leave the wireless network and handle the transfer of associations between access points. Management frames also include frame control fields, duration fields, address fields, and sequence control fields. Of course, the present disclosure is not limited to this.
  • the +HTC/Order subfield in the frame control field of the QoS Data frame, QoS Null frame and management frame indicates the presence of the HT (High Throughput) control field, and the B0 and B1 bits of the HT control field are both 1, Indicates that the HT control field is the HE variant.
  • the A-Control subfield (that is, bits B2-B31 of the HT control field) in the HT control field of the QoS Data frame, QoS Null frame and management frame includes the TPC report control field.
  • the A-Control subfield consists of 30 bits, which contains a variable length control list.
  • a control list contains one or more control subfields. Each control subfield includes a control ID and variable length control information.
  • the first 4 bits of each control subfield (ie, the B0-B3 bits of the control subfield) indicate the control ID. More specifically, in an optional embodiment according to the present disclosure, the control ID of the control subfield is as shown in Figure 2, including 4 bits, the value of which can be any one of 7-14.
  • the control information of the control subfield includes TPC report information as shown in Figure 2, which includes the first transmit power shown in 8 bits, and the link margin shown in 8 bits. Of course, the present disclosure is not limited to this.
  • the TPC report control field may also be located in the A-Control subfield of the HT control field in the control wrapper frame (Control Wrapper frame).
  • Control wrapping frame is a type of control frame. If a control frame is described as XX+HTC (for example: RTS+HTC, CTS+HTC, BlockAck+HTC, etc.), it means to use a control packaging frame to carry the control frame.
  • the A-Control subfield of the HT control field in the control wrapper frame also includes 30 bits.
  • the control list in the A-Control subfield can include any one of the values 7-14 A control ID whose control information includes the TPC report control field as shown in Figure 2. Of course, the present disclosure is not limited to this.
  • an MPDU (MAC Protocol Data Unit, MAC layer protocol data unit) is received, wherein the second transmission power for transmitting the MPDU is based at least in part on the first transmission power.
  • MPDU refers to a data packet transmitted in the MAC layer, including the MAC layer protocol header and data payload.
  • MPDU is data generated by the upper-layer application that is processed by the TCP/IP protocol stack and handed over to the MAC layer for processing, and then sent to the receiver through the physical layer.
  • the length of MPDU depends on the size of the data payload and the length of the MAC layer protocol header. Of course, the present disclosure is not limited to this.
  • the STA parses the target frame to obtain the TPC report control field. Then the STA extracts the TPC report control field to obtain the first transmit power, and then combines the first transmit power with the target frame's The received power is differentiated to obtain a difference value, and finally the difference value is used as the path loss to adjust the second transmit power through the path loss. Then the MPDU is sent to the AP using the second transmit power.
  • the method 1000 according to the embodiment of the present disclosure enables the AP to proactively report TPC report information to the STA, and enables the STA to adjust the second transmit power based on the first transmit power in the TPC report information. Therefore, the method 1000 according to the embodiment of the present disclosure implements an unsolicited TPC reporting mechanism. When a link problem occurs or a preset time is reached, the AP can automatically report TPC information in a timely manner, thereby enabling the STA to Ability to adaptively adjust transmit power.
  • a target frame including a TPC report control field, wherein the target frame is any one of a QoS Data frame, a QoS Null frame, and a management frame, and the TPC report control field Indicates the first transmit power for sending the target frame.
  • STAs may also compete for the channel through Enhanced Distribution Channel Access (EDCA).
  • EDCA Enhanced Distribution Channel Access
  • the STA may further determine whether it needs to actively send TPC report information to the AP.
  • the STA may determine whether it needs to send TPC report information to the AP through the target frame based on whether the preset time is reached.
  • the preset time refers to the time for reporting TPC information, and this preset time can be set according to specific needs. If TPC information needs to be reported at 12:00 and 16:00 every day, set the preset time to 12:00 and 16:00. If TPC information is reported every 30 minutes, you can set the next reporting time. The time is 30 minutes longer than the previous reporting time.
  • the STA may determine whether it needs to send TPC report information to the AP through a target frame based on whether the link changes. If the STA determines that the link has changed, it can send TPC report information to the AP through the target frame.
  • the present disclosure is not limited to this.
  • the first transmission power is the transmission power of the STA.
  • An example of the TPC report control field can be shown in Figure 2.
  • the TPC report control field includes control ID and TPC report information.
  • the TPC report information includes the first transmit power (transmit power in Figure 2) and link margin information.
  • the control ID field indicates that the variant type is a TPC report control variant.
  • the transmit power field is set to the transmit power at which the target frame is transmitted.
  • the link margin field indicates the link margin for the reception time and reception rate of the frame containing the TPC report request.
  • the link margin information may also be a reserved field, so that the first transmit power is only reported through the TPC report control field. Of course, the present disclosure is not limited to this.
  • the +HTC/Order subfield in the frame control field of the QoS Data frame, QoS Null frame and management frame indicates the presence of the HT (High Throughput) control field, and the B0 and B1 bits of the HT control field are both 1, Indicates that the HT control field is the HE variant.
  • the A-Control subfield (that is, bits B2-B31 of the HT control field) in the HT control field of the QoS Data frame, QoS Null frame and management frame includes the TPC report control field.
  • the present disclosure is not limited to this.
  • an MPDU (MAC Protocol Data Unit, MAC layer protocol data unit) is received, wherein the second transmission power for transmitting the MPDU is based at least in part on the first transmission power.
  • the AP parses the target frame to obtain the TPC report control field, and then the AP extracts the TPC report control field to obtain the first transmit power, and then combines the first transmit power with the target frame's
  • the received power is differentiated to obtain a difference value, and finally the difference value is used as the path loss to adjust the second transmit power through the path loss.
  • the MPDU is sent to the STA using the second transmit power.
  • the present disclosure is not limited to this.
  • the method 1000 according to the embodiment of the present disclosure enables the STA to compete for the channel and proactively report TPC report information to the AP, so that the AP can adjust the second transmit power based on the first transmit power in the TPC report information. Therefore, the method 1000 according to the embodiment of the present disclosure implements an unsolicited TPC reporting mechanism. When a link problem occurs or a preset time is reached, the STA can automatically report TPC information in a timely manner, thereby allowing the AP to Ability to adaptively adjust transmit power.
  • Figure 3 is a flow chart of yet another transmission power adjustment method provided according to an embodiment of the present disclosure.
  • a transmission power adjustment method 3000 is provided.
  • the execution subject of method 3000 is AP.
  • method 3000 includes the following operations S3001 to S3003.
  • any one of a basic trigger frame, a buffer status report polling trigger frame, a beamforming report polling trigger frame, and a bandwidth inquiry report polling trigger frame is sent.
  • the basic trigger frame, buffer status report polling trigger frame, beamforming report polling trigger frame and bandwidth query report polling trigger frame do not need to explicitly indicate that the STA should report TPC report information.
  • the buffer status report polling trigger frame is used to request buffer status reports from multiple STAs in response.
  • the bandwidth inquiry report polling trigger frame is used to request bandwidth information from multiple STAs in response.
  • the present disclosure is not limited to this.
  • a response frame including a TPC report control field indicating a first transmission power for transmitting the response frame is received.
  • the response frame may be a response to any one of the basic trigger frame, buffer status report polling trigger frame, beamforming report polling trigger frame and bandwidth inquiry report polling trigger frame, which may be HE TB PPDU (high efficiency trigger-based physical layer protocol data unit).
  • HE TB PPDU is a data frame format defined in the IEEE 802.11ax standard, which has higher data transmission efficiency and more control options.
  • the TPC report control field may be located in the control field of the HE TB PPDU.
  • the format of the TPC report control field is shown in Figure 2, which includes control ID and TPC report information.
  • the TPC report information includes the first transmit power (transmit power in Figure 2) and link margin information.
  • the TPC report control field has been described in detail with reference to FIG. 2 and will not be described again in this disclosure.
  • the STA when the STA receives any one of the basic trigger frame, buffer status report polling trigger frame, beamforming report polling trigger frame and bandwidth inquiry report polling trigger frame, in addition to generating these trigger frame requirements, it will further determine whether it is necessary to proactively report TPC information to the AP. For example, the STA may determine whether it needs to send TPC report information to the AP based on whether the preset time is reached. Among them, the preset time refers to the time for reporting TPC information, and this preset time can be set according to specific needs. If TPC information needs to be reported at 12:00 and 16:00 every day, set the preset time to 12:00 and 16:00.
  • the next reporting time can be set to be 30 minutes longer than the previous reporting time.
  • the STA may determine whether it needs to send TPC report information to the AP through a target frame based on whether the link changes. If STA determines the link changes, the TPC report information can be sent to the AP through the target frame.
  • the present disclosure is not limited to this.
  • the MPDU is transmitted with a second transmission power based at least in part on the first transmission power.
  • the AP parses the response frame to obtain the TPC report control field, and then the AP extracts the TPC report control field to obtain the first transmit power, and then combines the first transmit power with the response frame's
  • the received power is differentiated to obtain a difference value, and finally the difference value is used as the path loss to adjust the second transmit power through the path loss.
  • the MPDU is sent to the STA using the second transmit power.
  • the method 3000 according to the embodiment of the present disclosure enables the STA to actively report TPC report information to the AP when sending a response frame, so that the AP can adjust the second transmission power based on the first transmission power in the TPC report information. Therefore, the method 3000 according to the embodiment of the present disclosure implements an unsolicited TPC reporting mechanism. When a link problem occurs or a preset time is reached, the STA can automatically report TPC information in a timely manner, thereby allowing the AP to Ability to adaptively adjust transmit power.
  • FIG. 4A is a flowchart of yet another transmission power adjustment method provided according to an embodiment of the present disclosure.
  • Figure 4B is a schematic structural diagram of a TPC report polling trigger frame according to an embodiment of the present disclosure.
  • a transmission power adjustment method 4000 is provided.
  • the execution subject of method 4000 is AP.
  • method 4000 includes the following operations S4001 to S4003.
  • a TPC report polling trigger frame is sent, and the TPC report polling trigger frame is used to trigger multiple STAs to report TPC report information.
  • the TPC report polling trigger frame is determined by adjusting the format of the basic trigger frame originally defined by the protocol.
  • the TPC report polling trigger frame includes a frame control field, a duration field, a receiving address, a sending address, a public information field, a user information list, a padding field, and an FCS field.
  • the frame control field is used to indicate information such as protocol version, frame type/subtype (indicates that the frame type is a control frame, and the subtype is a trigger frame).
  • the duration field indicates the duration of the following frame exchange sequence.
  • the receiving address is set to a broadcast address.
  • the sending address is set to the sender's address.
  • the field in the public information indicates the type of trigger frame and the requested HE TB PPDU.
  • the length information indicates the uplink bandwidth and the transmit power of the AP. Therefore, this process can not only request the STA to send a TPC report, but also indirectly instruct the STA to send a TPC report.
  • the trigger related public information Trigger Dependent Common Info, TDCI
  • the trigger type subfield in the public information field indicates that the trigger frame is a TPC report polling trigger frame.
  • the user list information indicates some user information of all STAs that are triggered to perform TPC reporting, such as AID information, RU allocation information, MCS information, etc.
  • the trigger-related user information Trigger Dependent User Info, TDUI
  • Padding fields in trigger frames are optionally present to extend the frame length to give receiver STAs sufficient time to send a response SIFS time after the frame is received.
  • the FCS Full Check Sequence
  • a plurality of response frames including a TPC report control field indicating a first transmission power for sending the response frames are received.
  • the STA sequentially determines whether the TPC report polling trigger frame is supported, and whether the TPC report polling trigger frame contains the 12LSBs of the STA's corresponding AID.
  • the STA generates a HE TB PPDU, allowing the STA to report TPC report information to the AP through the TPC report control field.
  • the STA determines in turn whether it supports the TPC report polling trigger frame, and whether the TPC report polling trigger frame contains the 12LSBs of the STA's corresponding AID. If the STA supports the TPC report polling trigger frame and the TPC report polling trigger frame contains the 12LSBs of the STA's corresponding AID, the STA reports the TPC report information to the AP. If the STA does not support the TPC report polling trigger frame, the STA does not respond to the trigger frame. In this case, the AP can use the request frame defined in the protocol, such as requesting TPC by sending a TPC request frame or a link measurement request frame. Report information. Of course, the present disclosure is not limited to this.
  • the response frame is a HE TB PPDU, wherein the HE TB PPDU includes a TPC report control field, and the STA reports TPC report information to the AP through the TPC report control field, and the TPC report information includes the first transmission of the response frame. power.
  • the present disclosure is not limited to this.
  • the format of the TPC report control field is as shown in Figure 2.
  • the STA when the STA receives the TPC report polling trigger frame sent by the AP, the STA sends the received data of the TPC report polling trigger frame.
  • the level is recorded as P_RX1
  • the STA fills its own transmit power and the link margin into the TPC report information.
  • the details of the TPC report control field have been previously described in detail with reference to FIG. 2 and therefore will not be described again in this disclosure.
  • the MPDU is transmitted with a second transmission power based at least in part on the first transmission power.
  • transmitting the MPDU with the second transmit power includes: determining path loss based on the first transmit power in the TPC report control field and the received power of the response frame; based on the link in the TPC report information. a path margin field to determine the link margin; and based on the path loss and the link margin, determine a second transmit power.
  • the AP when the AP receives the HE TB PPDU sent by the STA, since the HE TB PPDU includes the TPC report control field, the AP directly parses the HE TB PPDU to obtain the TPC report control field, and then transmits the data in the TPC report control field. Power field and link margin field to determine TPC report information. For example, the AP will extract the transmit power in the TPC report information (that is, the first transmit power), and then make a difference between the transmit power and the received power of the HE TB PPDU to obtain the second difference, and use the second difference as the path loss.
  • the transmit power in the TPC report information that is, the first transmit power
  • the AP can determine the second transmit power based on the information in the path loss power and link margin fields.
  • the AP may also determine the link margin in the following scheme: correspond the reception level of the TPC report polling trigger frame to the received TPC report polling trigger frame Difference the sensitivity of the receiver to obtain the first difference, and use the first difference as the link margin.
  • the AP can determine the second transmit power based on the path loss power and the calculated link margin.
  • the present disclosure is not limited to this.
  • the method 4000 enables the AP to request TPC information from multiple associated STAs at the same time, thereby avoiding unnecessary consumption of links.
  • FIG. 5 is an implementation flow chart of a transmission power adjustment method provided according to an embodiment of the present disclosure.
  • Figure 6 is an implementation flow chart of a transmission power adjustment method provided according to an embodiment of the present disclosure.
  • Figure 7 is another implementation flow chart of a transmission power adjustment method provided according to an embodiment of the present disclosure.
  • the present disclosure also provides a transmission power adjustment method 50, which includes the following steps.
  • Step S501 Determine whether the preset time is reached.
  • the preset time refers to the time for reporting TPC information, and this preset time can be set according to specific needs. If TPC information needs to be reported at 12:00 and 16:00 every day, set the preset time to 12:00 and 16:00. If TPC information is reported every 30 minutes, the next reporting time can be set to be 30 minutes longer than the previous reporting time.
  • Step S502 If the preset time is reached, determine whether to compete for the channel or receive any one of the basic trigger frame, buffer status report polling trigger frame, beamforming report polling trigger frame and bandwidth query report polling trigger frame. any one of.
  • the time needs to be judged first. If the set preset time is reached, then it is judged whether to compete for the channel or receive the basic trigger frame, buffer status report polling trigger frame, Either of the beamforming report polling trigger frame and the bandwidth query report polling trigger frame, thereby setting the TPC report control field containing TPC information in different types of frames to report TPC information. Among them, if the channel is competed for, the TPC report control field can be set in, for example, a data frame through active reporting.
  • buffer status report polling trigger frame If any one of the basic trigger frame, buffer status report polling trigger frame, beamforming report polling trigger frame, and bandwidth inquiry report polling trigger frame is received, you need to base the basic trigger frame, buffer status report polling trigger frame , respond to any one of the beamforming report polling trigger frame and the bandwidth inquiry report polling trigger frame to set the TPC report control field in the response frame.
  • Step S503 If either the channel is competed for or the response trigger frame is received, the first transmit power is reported through the TPC report control field;
  • Step S504 Calculate the path loss based on the first transmission power to adjust the second transmission power through the path loss.
  • This disclosure sets two ends, namely the AP end and the STA end.
  • the AP and STA do not need to request each other, and the first transmit power can be reported through the TPC report control field to adjust the first transmit power based on the first transmit power.
  • the second transmit power ensures that in the event of a link problem, the first transmit power can be reported in time to achieve adaptive adjustment of the second transmit power.
  • the TPC report control field can actively indicate TPC report information
  • the TPC report control field can be set in the target frame or the response frame to achieve the goal of actively reporting TPC report information to adjust the second transmission power.
  • the TPC report information reported by the AP and STA to each other includes: The first situation: the AP actively reports to The STA reports the TPC report information, so that the STA adjusts the second transmit power based on the first transmit power in the TPC report information. In the second case, the STA actively reports the TPC report information to the AP, so that the AP adjusts the second transmit power based on the first transmit power in the TPC report information.
  • the AP actively reports TPC report information to the STA, so that the STA adjusts the second transmit power based on the first transmit power in the TPC report information.
  • the execution steps include: If the AP competes through EDCA to the channel, and sends the target frame to the STA. After the STA receives the target frame, it parses the target frame and obtains the TPC report control field. Then the STA extracts the TPC report control field to obtain the first transmit power, and then transmits the first transmit power to the STA.
  • the target frame includes at least one of QoS Data frame, QoS Null frame and management frame.
  • the STA actively reports TPC report information to the AP, so that the STA adjusts the second transmit power based on the first transmit power in the TPC report information.
  • the first method is that the STA competes for the channel and actively reports the TPC to the AP. Report information to enable the STA to adjust the second transmission power based on the first transmission power in the TPC report information.
  • the second method the STA responds to the trigger frame and proactively reports TPC report information to the AP, so that the STA adjusts the second transmit power based on the first transmit power in the TPC report information.
  • the STA competes for the channel and actively reports TPC report information to the AP, so that the STA adjusts the second transmit power based on the first transmit power in the TPC report information.
  • the steps include: If the STA Compete for the channel through EDCA and send the target frame to the AP. After the AP receives the target frame, it parses the target frame to obtain the TPC report control field, and then extracts the TPC report control field to obtain the first transmit power, and then The difference between the first transmit power and the received power of the target frame is obtained, and finally the difference is used as the path loss to adjust the second transmit power through the path loss, where the second transmit power is used to represent the message to the opposite end device. Transmission power of the transmission.
  • the target frame includes at least one of QoS Data frame, QoS Null frame and management frame.
  • the STA responds to the trigger frame and actively reports TPC report information to the AP, so that the STA adjusts the second transmit power based on the first transmit power in the TPC report information.
  • the steps include: If The STA responds to the trigger frame and sends the response frame corresponding to the trigger frame to the AP. After the AP receives the response frame, it parses the response frame to obtain the TPC report control field, and then extracts the TPC report control field to obtain the first transmit power. Then make a difference between the first transmit power and the received power of the response frame to obtain the difference. Finally, the difference is used as the path loss to pass the path.
  • the loss adjusts the second transmission power, where the second transmission power is used to characterize the transmission power for message transmission to the opposite end device.
  • the response frame is a trigger frame other than the MU-RTS trigger frame and the TPC report polling trigger frame, and can be a basic trigger frame, a buffer status report polling trigger frame, a bandwidth inquiry report polling trigger frame, etc.
  • the second transmission power is used to represent the transmission power for message transmission to the opposite end device, where the opposite end device refers to the STA.
  • the second transmission power is used to represent the transmission power for message transmission to the opposite end device, where the opposite end device refers to the STA associated with the AP.
  • the first transmit power is obtained in time, and based on The first transmit power adjusts the second transmit power to ensure that the transmit power can be adaptively adjusted even if there is a link problem.
  • Figure 8 is an implementation flow chart of a transmission power adjustment method according to an embodiment of the present disclosure.
  • Figure 9 is a schematic diagram of an implementation of a transmission power adjustment method according to an embodiment of the present disclosure.
  • a transmission power adjustment method 80 is provided, including the following steps.
  • Step S801 The STA receives the TPC report polling trigger frame sent by the AP.
  • the details of the TPC report polling trigger frame have been described in detail with reference to FIG. 4B and will not be described again in this disclosure.
  • Step S802 Based on the TPC report polling trigger frame, report the TPC report information to the AP.
  • the STA when the STA receives the TPC report polling trigger frame sent by the AP, the STA sequentially determines whether it supports the TPC report polling trigger frame and whether the TPC report polling trigger frame contains the 12LSBs of the STA's corresponding AID. When the above judgment results are all yes, the STA generates a HE TB PPDU, allowing the STA to report TPC report information to the AP through the TPC report control field.
  • the STA determines in turn whether it supports the TPC report polling trigger frame, and whether the TPC report polling trigger frame contains the 12LSBs of the STA's corresponding AID.
  • the specific execution steps are as follows: The STA determines whether it supports the TPC report polling trigger frame and obtains the first judgment result. , and then report the TPC report information to the AP based on the first judgment result.
  • reporting the TPC report information to the AP includes: if the first judgment result is yes, the STA judges whether the TPC report polling trigger frame contains the 12LSBs of the AID corresponding to the STA, and obtains the second judgment result, and then Based on the second judgment result, report the TPC report information to the AP; if the first judgment result is no, the STA does not respond to the trigger frame.
  • the AP TPC report information can be requested using request frames defined in the protocol, such as by sending a TPC request frame or a link measurement request frame.
  • reporting the TPC report information to the AP includes: if the second judgment result is yes, the STA generates a HE TB PPDU, where the HE TB PPDU includes the TPC report control field, and then the STA reports the control field through the TPC Report TPC report information to the AP.
  • Step S803 The AP determines the path loss and link margin based on the TPC report information, and adjusts the target transmit power based on the path loss and link margin, where the target transmit power is used to characterize the transmit power for message transmission to the STA.
  • the AP When the AP receives the HE TB PPDU sent by the STA, since the HE TB PPDU includes the TPC report control field, the AP directly parses the HE TB PPDU to obtain the TPC report control field, and then uses the transmit power field and link in the TPC report control field.
  • the path margin field is used to determine the TPC report information.
  • the STA In order to achieve adaptive adjustment of the transmit power for message transmission to the STA, the STA needs to determine the link margin information, and the AP also needs to determine the path loss based on the TPC report information.
  • the path loss can be determined based on the TPC report information and the received power of the HE TB PPDU.
  • the execution steps are as follows: first extract the transmit power in the TPC report information, and then make a difference between the transmit power and the received power of the HE TB PPDU to obtain the second difference, and use the second difference as the path loss.
  • the transmit power indicated in the TPC report control field reported by the STA is P_TX
  • the received power of the HE TB PPDU is P_RX1
  • the path loss power P_L P_TX-P_RX1.
  • the steps are as follows: Difference the reception level of the TPC report polling trigger frame and the sensitivity of the receiver corresponding to the TPC report polling trigger frame to obtain the first difference, and add the A difference is used as the link margin.
  • embodiments of the present disclosure provide a transmission power adjustment method, which includes: the STA receives the TPC report polling trigger frame sent by the AP, and reports the TPC report information to the AP based on the TPC report polling trigger frame, and then the AP reports the TPC report information based on the TPC Report information, determine path loss and link margin, and adjust target transmit power based on path loss and link margin.
  • the AP can send TPC report polling trigger frames to one or more STAs at the same time to obtain the TPC information reported by one or more STAs. It determines the path loss and link margin based on the TPC information, and then adjusts the target transmit power based on the path loss and link margin. It is not only suitable for the scenario where an AP requests TPC information from multiple associated STAs at the same time, but also avoids the link Unnecessary consumption of roads.
  • the present disclosure also provides a transmission power adjustment device including a first judgment module, a second judgment module, a power reporting module and a power adjustment module, specifically as follows: a first judgment module, used to judge whether the preset time is reached; The second judgment module is used to judge whether the channel is competed for and the response trigger frame is received if the preset time is reached; the power reporting module is used to judge whether the channel is competed for or the response trigger frame is received.
  • the TPC report control field reports the first transmission power; the power adjustment module is configured to calculate the path loss based on the first transmission power to adjust the second transmission power through the path loss.
  • the power reporting module includes: a first sending submodule, used to send the target frame to the STA if the AP competes for the channel through EDCA; a first parsing submodule, used to wait for the STA to receive the target frame Finally, the target frame is parsed to obtain the TPC report control field; the first information extraction submodule is used to extract the TPC report control field to obtain the first transmission power.
  • the power reporting module includes: a second sending submodule, used to send the target frame to the AP if the STA competes for the channel through EDCA; a second parsing submodule, used to wait for the AP to receive the target frame Finally, the target frame is parsed to obtain the TPC report control field; the second information extraction submodule is used to extract the TPC report control field to obtain the first transmit power.
  • the power adjustment module includes: a first calculation submodule, used to make a difference between the first transmit power and the received power of the target frame to obtain a difference; a first adjustment submodule, used to calculate the difference between the first transmit power and the received power of the target frame.
  • the difference is used as the path loss to adjust the second transmission power through the path loss, where the second transmission power is used to characterize the transmission power for message transmission to the opposite end device.
  • the target frame includes at least one of a QoS Data frame, a QoS Null frame and a management frame.
  • the power reporting module includes: a third sending module, used to send a response frame corresponding to the trigger frame to the AP if the STA responds to the trigger frame; a third parsing module, used to wait until the AP receives the response frame Finally, the response frame is parsed to obtain the TPC report control field; the third information extraction module is used to extract the TPC report control field to obtain the first transmit power.
  • the power adjustment module 54 includes: a second calculation sub-module, used to make a difference between the first transmit power and the received power of the response frame to obtain a difference; a second adjustment sub-module, used to The difference is used as the path loss to adjust the second transmit power through the path loss, where the second transmit power is It is used to represent the transmission power of message transmission to the peer device.
  • the TPC report control field includes control ID, first transmit power and link margin information.
  • the present disclosure also provides a transmit power adjustment device including a request reception module, an information reporting module and a power adjustment module, specifically as follows: a request reception module for the STA to receive the TPC report polling trigger frame sent by the AP; an information reporting module , used to report TPC report information to the AP based on the TPC report polling trigger frame; the power adjustment module is used for the AP to determine the path loss and link margin based on the TPC report information, and adjust the target based on the path loss and link margin. Transmit power, where the target transmit power is used to characterize the transmit power for message transmission to the STA.
  • the information reporting module includes: a judgment sub-module, used by the STA to judge whether to support the TPC report polling trigger frame, and obtain a first judgment result; and a decision-making sub-module, based on the first judgment result, report to The AP reports TPC report information.
  • the decision-making submodule includes: a judgment unit, used for, if the first judgment result is yes, the STA judges whether the TPC report polling trigger frame contains the 12LSBs of the AID corresponding to the STA, and obtains the second judgment result. ; The decision-making unit is used to report TPC report information to the AP based on the second judgment result.
  • the decision-making unit includes: a generating subunit, used for the STA to generate a HE TB PPDU if the second judgment result is yes, where the HE TB PPDU includes a TPC report control field; a reporting subunit, used for The STA reports TPC report information to the AP through the TPC report control field.
  • the power adjustment module includes: a path loss calculation submodule, used to determine the path loss based on the TPC report information and the received power of the HE TB PPDU; a link margin acquisition submodule, used to read The link margin field in the TPC report information is used to determine the link margin based on the link margin field; the power adjustment submodule is used to adjust the target transmit power based on path loss and link margin.
  • the path loss calculation sub-module includes: a power extraction unit, used to extract the transmit power in the TPC report information; a path loss calculation unit, used to compare the transmit power with the received power of the HE TB PPDU difference, obtain the second difference value, and use the second difference value as the path loss.
  • the TPC report polling trigger frame includes a frame control field, a duration field, a receiving address, a sending address, a public information field, a user information list, a padding field, and an FCS field.
  • FIG 10 is a schematic diagram of an AP provided by an embodiment of the present invention.
  • the AP 6 includes a processor 61 , a memory 62 and a computer program 63 stored in the memory 62 and executable on the processor 61 .
  • the processor 61 executes the computer program 63, the steps in each of the above embodiments of the transmission power adjustment method are implemented,
  • the present disclosure also provides a readable storage medium.
  • a computer program is stored in the readable storage medium. When the computer program is executed by a processor, it is used to implement the methods provided by the above-mentioned various embodiments.
  • the readable storage medium may be a computer storage medium or a communication medium.
  • Communication media includes any medium that facilitates transfer of a computer program from one place to another.
  • Computer storage media can be any available media that can be accessed by a general purpose or special purpose computer.
  • a readable storage medium is coupled to a processor such that the processor can read information from the readable storage medium and write information to the readable storage medium.
  • the readable storage medium may also be an integral part of the processor.
  • the processor and readable storage medium may be located in Application Specific Integrated Circuits (ASICs for short). Additionally, the ASIC can be located in the user equipment.
  • ASICs Application Specific Integrated Circuits
  • the processor and the readable storage medium may also exist as discrete components in the communication device.
  • Readable storage media can be read-only memory (ROM), random-access memory (RAM), CD-ROM, tapes, floppy disks, optical data storage devices, etc.
  • the present disclosure also provides a program product including execution instructions stored in a readable storage medium. At least one processor of the device can read the execution instruction from the readable storage medium, and the at least one processor executes the execution instruction so that the device implements the smart antenna scheduling method provided by the various embodiments mentioned above.
  • the processor can be a central processing unit (English: Central Processing Unit, referred to as: CPU), or other general-purpose processor, digital signal processor (English: Digital Signal Processor, referred to as : DSP), application specific integrated circuit (English: Application Specific Integrated Circuit, abbreviation: ASIC), etc.
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

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Abstract

本公开公开了一种发射功率调整方法，包括：响应于竞争到信道，发送包括发射功率控制(TPC)报告控制字段的目标帧，其中，所述目标帧是QoS Data帧、QoS Null帧和管理帧中的任一项，所述TPC报告控制字段指示发送所述目标帧的第一发射功率；以及接收MAC层协议数据单元(MPDU)，其中传输所述MPDU的第二发射功率至少部分地基于所述第一发射功率。

Description

发射功率调整方法
本公开要求于2022年8月4日递交的第202210932018.X号中国专利申请和于2022年8月4日递交的第202210933105.7号中国专利申请的优先权，在此全文引用上述中国专利申请公开的内容以作为本公开的一部分。
技术领域
本公开属于通信技术领域，尤其涉及一种发射功率调整方法和一种计算机可读存储介质。
背景技术
WiFi 5G频段中的发射功率控制(TPC)是一种用于调整无线网络设备发射功率的技术，其目的是确保设备之间的通信质量和稳定性，同时避免对其他设备或周围环境造成干扰。TPC技术通过测量信号质量和环境噪声等因素，动态调整设备的发射功率，以保持信号质量在一个可接受的范围内。
然而，在AP和STA之间的链路发生变化的情况下，当前的TPC方案会导致STA无法及时地上报TPC信息。此外，在当前的TPC方案下，AP一次只能向一个STA请求TPC信息，TPC信息的获取效率较低。因此，需要对现有的发射功率控制进行改进。
发明内容
第一方面，本公开实施例提供了一种发射功率调整方法，包括：响应于竞争到信道，发送包括发射功率控制(TPC)报告控制字段的目标帧，其中，所述目标帧是QoS Data帧、QoS Null帧和管理帧中的任一项，所述TPC报告控制字段指示发送所述目标帧的第一发射功率；以及接收MAC层协议数据单元(MPDU)，其中传输所述MPDU的第二发射功率至少部分地基于所述第一发射功率。
第二方面，本公开实施例提供了一种发射功率调整方法，包括：发送基本触发帧、缓冲状态报告轮询触发帧、波束成形报告轮询触发帧和带宽询问报告轮询触发帧中的任意一项；接收包括TPC报告控制字段的响应帧，所述TPC报告控制字段指示发送所述响应帧的第一发射功率；以及以第二发射功率传 输MPDU，所述第二发射功率至少部分地基于所述第一发射功率。
第三方面，本公开实施例提供了一种发射功率调整方法，包括：发送TPC报告轮询触发帧，所述TPC报告轮询触发帧用于触发多个STA上报TPC报告信息；接收多个包括TPC报告控制字段的响应帧，所述TPC报告控制字段指示发送所述响应帧的第一发射功率；以及以第二发射功率传输MPDU，所述第二发射功率至少部分地基于所述第一发射功率。
第四方面，本公开实施例提供了一种计算机可读存储介质，计算机可读存储介质存储有计算机程序，计算机程序被处理器执行时实现如上任一种智能天线调度方法的步骤。
本公开实施例提出了一种未经请求的TPC报告的机制，在链路出现问题的情况下，AP或STA能够及时地自动地报告TPC信息，进而自适应地调整发射功率。此外，本公开实施例还可适用于一个AP同时向多个STA请求TPC信息的场景，还避免了链路不必要的消耗。
附图说明
为了更清楚地说明本公开实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一一简单地介绍，显而易见地，下面描述中的附图是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。在附图中：
图1是根据本公开的实施例提供的发射功率调整方法的流程图。
图2是本公开实施例提供的TPC报告控制字段的结构示意图。
图3是根据本公开的实施例提供的又一发射功率调整方法的流程图。
图4A是根据本公开的实施例提供的又一发射功率调整方法的流程图。
图4B是根据本公开实施例的TPC报告轮询触发帧的结构示意图。
图5根据本公开的实施例提供的一种发射功率调整方法的实现流程图。
图6是根据本公开的实施例提供的一种发射功率调整方法的实现流程图。
图7是根据本公开的实施例提供的一种发射功率调整方法的又一实现流程图。
图8是根据本公开实施例的一种发射功率调整方法的实现流程图。
图9是根据本公开实施例的一种发射功率调整方法的实现示意图。
图10是本公开实施例提供的终端的示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
本公开的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本公开的实施例能够以除了在这里图示或描述的那些以外的顺序实施。
应当理解，在本公开的各种实施例中，各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本公开实施例的实施过程构成任何限定。
应当理解，在本公开中，“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
应当理解，在本公开中，“多个”是指两个或两个以上。“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。“包含A、B和C”、“包含A、B、C”是指A、B、C三者都包含，“包含A、B或C”是指包含A、B、C三者之一，“包含A、B和/或C”是指包含A、B、C三者中任1个或任2个或3个。
应当理解，在本公开中，“与A对应的B”、“与A相对应的B”、“A与B相对应”或者“B与A相对应”，表示B与A相关联，根据A可以确定B。根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其他信息确定B。A与B的匹配，是A与B的相似度大于或等于预设的阈值。
取决于语境，如在此所使用的“若”可以被解释成为“在……时”或“当……时”或“响应于确定”或“响应于检测”。
下面以具体地实施例对本公开的技术方案进行详细说明。下面这几个具体的实施例可以相互结合，对于相同或相似的概念或过程可能在某些实施例不再赘述。
为使本公开的目的、技术方案和优点更加清楚，下面将结合附图通过具体实施例来进行说明。
根据目前的IEEE 802.11协议，在5GHz频段上运行的设备(包括AP和STA)需要具有发射功率控制(TPC)功能，以满足监管领域的要求。TPC功能要求对发射机的发射功率进行控制，以使得发射机的发射功率满足监管域规定的最大发射功率的限制和本地的最大发射功率的约束。STA使用的发射功率应小于或等于信道的本地最大发射功率电平，AP的发射功率应小于或等于信道的监管最大发射功率水平，并满足任何监管缓解要求。在确定当前信道的监管最大发射功率和当前信道的本地最大发射功率后，设备应根据要求执行频谱管理操作，包括发射功率控制和其他服务。这些操作旨在保证设备在5GHz频段上的合规性和稳定性。
目前，一般通过AP向STA进行TPC报告请求，以获取STA的TPC信息，进而通过TPC信息来动态地调整MPDU向STA进行消息传输的发射功率。但是，如果AP和STA之间的链路发生变化，STA可能无法及时地上报TPC信息，出现无法调整MPDU向STA进行消息传输的发射功率的问题。此外，AP通常一次仅能向一个STA发送TPC请求帧或链路测量请求帧来获取该STA的TPC信息。这样的方案不适用于一个AP同时向多个STA请求TPC信息的场景。
为此，提出了本公开的各项实施例，根据本公开的各项实施例对当前的TPC信息的传输机制进行改进，进而使得AP或STA能够更及时地更主动地上报TPC信息，从而自适应地调整发射功率。
图1是根据本公开的实施例提供的发射功率调整方法的流程图。图2是本公开实施例提供的TPC报告控制字段的结构示意图。
在根据本公开的实施例中，如图1所示，提供了一种发射功率调整方法1000。方法1000的执行主体既可以是AP(Access Point，接入点)也可以是STA。
以方法1000的执行主体是AP(Access Point，接入点)为例进行说明。AP是一种无线网络设备，用于将有线网络连接转换成无线信号，让无线设备 可以连接到网络。AP可以提供无线网络覆盖范围，允许多个无线设备同时连接到网络(例如，WIFI网络)。AP是一个无线网络的创建者，是网络的中心节点，一般家庭或办公室使用的无线路由器就是一个AP。可选地，方法100包括以下操作S1001至S1002。
在操作S1001中，响应于竞争到信道，发送包括TPC报告控制字段的目标帧，其中，所述目标帧是QoS Data帧、QoS Null帧和管理帧中的任一项，所述TPC报告控制字段指示发送所述目标帧的第一发射功率。
可选地，AP可能通过EDCA(Enhanced Distribution Channel Access，增强型分布式信道访问)竞争到信道。EDCA是一种无线局域网(WLAN)协议，用于调节多个无线设备之间的信道访问。在EDCA中，每个无线设备被分配了一个优先级，根据其优先级来决定其访问信道的权利。竞争到信道的过程是指当一个设备想要发送数据时，它会检查信道是否可用，如果信道空闲，则设备将进行随机退避流程，以获取对信道的访问权。EDCA中，优先级较高的设备会有更大概率地获得信道的访问权，以确保其数据传输的优先级。当然，本公开并不以此为限。
可选地，在AP通过EDCA竞争到信道后，AP可能会进一步判断是否需要主动向STA发送TPC报告信息。STA是每一个连接到无线网络中的终端(如笔记本电脑、PAD及其它可以联网的用户设备)，也可称为一个站点。例如，AP可能基于是否达到预设时刻来确定是否需要通过目标帧向STA发送TPC报告信息。其中，预设时刻是指上报TPC信息的时间，此预设时刻可以根据具体需求进行设定。若每天的12点和16点需要进行TPC信息的上报，则将预设时刻设置为12点和16点。若每30min上报一次TPC信息，则可设定后一次上报时刻比前一次上报时刻多30min。又例如，AP可能基于链路情况是否变化来确定是否需要通过目标帧向STA发送TPC报告信息。AP如果判断链路变化，则可以通过目标帧向STA发送TPC报告信息。当然本公开并不以此为限。
可选地，所述第一发射功率是AP的发射功率。所述TPC报告控制字段的示例可以如图2所示。TPC报告控制字段包括控制ID和TPC报告信息。TPC报告信息包括第一发射功率(图2中的发射功率，例如，使用8个比特位来表示)和链路裕度信息(例如使用8个比特位来表示)。其中，控制ID指示该字段为TPC报告控制字段。发射功率字段被设置为传输所述目标帧的发射功 率。链路裕度字段指示对于包含TPC报告请求的帧的接收时间和接收速率的链路裕度。需要注意的是，虽然TPC报告控制字段主要用来指示TPC报告信息，但是，在本公开中，链路裕度信息也可以是保留字段，从而仅通过TPC报告控制字段报告第一发射功率。当然本公开并不以此为限。
可选地，TPC报告控制字段存在于目标帧中，也即存在于QoS数据帧(Qos Data帧)、QoS空帧(Qos Null帧)和管理帧中。其中，QoS数据帧和QoS空帧均是数据帧。数据帧负责搬运数据，其会将上层协议的数据置于帧主体中加以传递。QoS数据帧和QoS空帧均包括帧控制字段、持续时间字段、地址字段和序列控制字段，并且QoS数据帧和QoS空帧的帧控制字段的子类型字段中的QOS子字段指示该数据帧存在QOS控制字段。管理帧通常负责监督，主要用来加入或退出无线网络以及处理接入点之间关联的转移事宜。管理帧也包括帧控制字段、持续时间字段、地址字段和序列控制字段。当然本公开并不以此为限。
可选地，QoS Data帧、QoS Null帧和管理帧的帧控制字段中的+HTC/Order subfield子字段指示存在HT(High Throughput)控制字段，并且HT控制字段的B0和B1位均为1，指示该HT控制字段为HE变体。在QoS Data帧、QoS Null帧和管理帧的HT控制字段中的A-Control子字段(也即HT控制字段的第B2-B31位)包括该TPC报告控制字段。A-Control子字段包括30个位，其包括可变长度的控制列表。控制列表包括了一个或多个控制子字段。每个控制子字段包括控制ID和可变长度的控制信息。具体地，每个控制子字段的前4个位(也即，控制子字段的B0-B3位)指示控制ID。更具体地，在根据本公开的一个可选实施例中，控制子字段的控制ID如图2所示，包括4个位，其值可以为7-14中的任一项。控制子字段的控制信息包括如图2所示的TPC报告信息，其包括以8个位示出的第一发射功率，和以8个位示出的链路裕度。当然本公开并不以此为限。
可选地，TPC报告控制字段还可位于控制包装帧(Control Wrapper frame)中的HT控制字段的A-Control子字段中。控制包装帧属于控制帧的一种。如果一个控制帧被描述为XX+HTC(例如：RTS+HTC，CTS+HTC，BlockAck+HTC等),其意思是使用控制包装帧来承载该控制帧。类似地，在该示例中，控制包装帧中的HT控制字段的A-Control子字段也包括30个位。并且A-Control子字段中的控制列表(control list)可以包括值为7-14中的任一 一项的控制ID，其控制信息包括如图2所示的TPC报告控制字段。当然本公开并不以此为限。
在操作S1002中，接收MPDU(MAC Protocol Data Unit，MAC层协议数据单元)，其中传输所述MPDU的第二发射功率至少部分地基于所述第一发射功率。
可选地，在数据通信中，MPDU是指在MAC层中传输的数据包，包含了MAC层协议头和数据负载。MPDU是由上层应用程序生成的数据经过TCP/IP协议栈处理后交给MAC层处理，然后通过物理层发送到接收方。MPDU的长度取决于数据负载的大小和MAC层协议头的长度。当然本公开并不以此为限。
可选地，STA在接收到目标帧后，对目标帧进行解析，得到TPC报告控制字段，然后STA对TPC报告控制字段进行提取，得到第一发射功率，再将第一发射功率和目标帧的接收功率进行作差，得到差值，最后将差值作为路径损耗，以通过路径损耗调节第二发射功率。然后利用第二发射功率向AP发送MPDU。
由此，根据本公开实施例的方法1000使得AP端主动向STA端上报TPC报告信息，使STA端基于TPC报告信息中的第一发射功率调整第二发射功率。从而，根据本公开实施例的方法1000实现了一种未经请求的TPC报告的机制，在链路出现问题或达到预设时间的情况下，AP能够及时地自动地报告TPC信息，进而使得STA能够自适应地调整发射功率。
接着，再以方法1000的执行主体是STA为例进行说明。
在操作S1001中，响应于竞争到信道，发送包括TPC报告控制字段的目标帧，其中，所述目标帧是QoS Data帧、QoS Null帧和管理帧中的任一项，所述TPC报告控制字段指示发送所述目标帧的第一发射功率。
可选地，STA也可能通过EDCA(Enhanced Distribution Channel Access，增强型分布式信道访问)竞争到信道。在STA通过EDCA竞争到信道后，STA可能会进一步判断是否需要主动向AP发送TPC报告信息。例如，STA可能基于是否达到预设时刻来确定是否需要通过目标帧向AP发送TPC报告信息。其中，预设时刻是指上报TPC信息的时间，此预设时刻可以根据具体需求进行设定。若每天的12点和16点需要进行TPC信息的上报，则将预设时刻设置为12点和16点。若每30min上报一次TPC信息，则可设定后一次上报时 刻比前一次上报时刻多30min。又例如，STA可能基于链路是否变化来确定是否需要通过目标帧向AP发送TPC报告信息。STA如果判断链路变化，则可以通过目标帧向AP发送TPC报告信息。当然本公开并不以此为限。
类似地，所述第一发射功率是STA的发射功率。所述TPC报告控制字段的示例可以如图2所示。TPC报告控制字段包括控制ID和TPC报告信息。TPC报告信息包括第一发射功率(图2中的发射功率)和链路裕度信息。其中，控制ID字段指示该变体类型为TPC报告控制变体。发射功率字段被设置为传输所述目标帧的发射功率。链路裕度字段指示对于包含TPC报告请求的帧的接收时间和接收速率的链路裕度。需要注意的是，虽然TPC报告控制字段主要用来指示TPC报告信息，但是，在本公开中，链路裕度信息也可以是保留字段，从而仅通过TPC报告控制字段报告第一发射功率。当然，本公开并不以此为限。
可选地，QoS Data帧、QoS Null帧和管理帧的帧控制字段中的+HTC/Order subfield子字段指示存在HT(High Throughput)控制字段，并且HT控制字段的B0和B1位均为1，指示该HT控制字段为HE变体。在QoS Data帧、QoS Null帧和管理帧的HT控制字段中的A-Control子字段(也即HT控制字段的第B2-B31位)包括该TPC报告控制字段。当然，本公开并不以此为限。
在操作S1002中，接收MPDU(MAC Protocol Data Unit，MAC层协议数据单元)，其中传输所述MPDU的第二发射功率至少部分地基于所述第一发射功率。
可选地，AP在接收到目标帧后，对目标帧进行解析，得到TPC报告控制字段，然后AP对TPC报告控制字段进行提取，得到第一发射功率，再将第一发射功率和目标帧的接收功率进行作差，得到差值，最后将差值作为路径损耗，以通过路径损耗调节第二发射功率。然后利用第二发射功率向STA发送MPDU。当然，本公开并不以此为限。
由此，根据本公开实施例的方法1000使得STA竞争到信道，主动向AP端上报TPC报告信息，使AP能基于TPC报告信息中的第一发射功率调整第二发射功率。从而，根据本公开实施例的方法1000实现了一种未经请求的TPC报告的机制，在链路出现问题或达到预设时间的情况下，STA能够及时地自动地报告TPC信息，进而使得AP能够自适应地调整发射功率。
图3是根据本公开的实施例提供的又一发射功率调整方法的流程图。
在根据本公开的实施例中，如图3所示，提供了一种发射功率调整方法3000。在以下示例中，方法3000的执行主体是AP。可选地，方法3000包括以下操作S3001至S3003。
在操作S3001中，发送基本触发帧、缓冲状态报告轮询触发帧、波束成形报告轮询触发帧和带宽询问报告轮询触发帧中的任意一项。
可选地，所述基本触发帧、缓冲状态报告轮询触发帧、波束成形报告轮询触发帧和带宽询问报告轮询触发帧无需明确地指示STA应当上报TPC报告信息。例如，缓冲状态报告轮询触发帧用于向多个STA请求缓冲状态报告作为响应。而带宽询问报告轮询触发帧则用于向多个STA请求带宽信息作为响应。当然本公开并不以此为限。
在操作S3002中，接收包括TPC报告控制字段的响应帧，所述TPC报告控制字段指示发送所述响应帧的第一发射功率。
可选地，所述响应帧可作为所述基本触发帧、缓冲状态报告轮询触发帧、波束成形报告轮询触发帧和带宽询问报告轮询触发帧中的任意一项的响应，其可以是HE TB PPDU(high efficiency trigger-based physical layer protocol data unit)。HE TB PPDU是IEEE 802.11ax标准中定义的一种数据帧格式，其具有更高的数据传输效率和更多的控制选项。例如，所述TPC报告控制字段可以位于HE TB PPDU的控制字段中。所述TPC报告控制字段的格式如图2所示，其包括控制ID和TPC报告信息。TPC报告信息包括第一发射功率(图2中的发射功率)和链路裕度信息。之前已经参考图2详细地描述了TPC报告控制字段，本公开在此不再赘述。
可选地，STA在接收到所述基本触发帧、缓冲状态报告轮询触发帧、波束成形报告轮询触发帧和带宽询问报告轮询触发帧中的任意一项时，除了生成这些触发帧要求的响应之外，还会进一步判断是否需要向AP主动报告TPC信息。例如，STA可能基于是否达到预设时刻来确定是否需要向AP发送TPC报告信息。其中，预设时刻是指上报TPC信息的时间，此预设时刻可以根据具体需求进行设定。若每天的12点和16点需要进行TPC信息的上报，则将预设时刻设置为12点和16点。若每30min上报一次TPC信息，则可设定后一次上报时刻比前一次上报时刻多30min。又例如，STA可能基于链路是否变化来确定是否需要通过目标帧向AP发送TPC报告信息。STA如果判断链路 变化，则可以通过目标帧向AP发送TPC报告信息。当然本公开并不以此为限。
在操作S3003中，以第二发射功率传输MPDU，所述第二发射功率至少部分地基于所述第一发射功率。
可选地，AP在接收到响应帧后，对响应帧进行解析，得到TPC报告控制字段，然后AP对TPC报告控制字段进行提取，得到第一发射功率，再将第一发射功率和响应帧的接收功率进行作差，得到差值，最后将差值作为路径损耗，以通过路径损耗调节第二发射功率。然后利用第二发射功率向STA发送MPDU。
由此，根据本公开实施例的方法3000使得STA通过借由发送响应帧的时机主动向AP端上报TPC报告信息，使AP能基于TPC报告信息中的第一发射功率调整第二发射功率。从而，根据本公开实施例的方法3000实现了一种未经请求的TPC报告的机制，在链路出现问题或达到预设时间的情况下，STA能够及时地自动地报告TPC信息，进而使得AP能够自适应地调整发射功率。
图4A是根据本公开的实施例提供的又一发射功率调整方法的流程图。图4B是根据本公开实施例的TPC报告轮询触发帧的结构示意图。
在根据本公开的实施例中，如图4A所示，提供了一种发射功率调整方法4000。在以下示例中，方法4000的执行主体是AP。可选地，方法4000包括以下操作S4001至S4003。
在操作S4001中，发送TPC报告轮询触发帧，所述TPC报告轮询触发帧用于触发多个STA上报TPC报告信息。
可选地，TPC报告轮询触发帧是通过在协议原定义的基本的触发帧的格式基础上进行调整确定。如图4B所示，所述TPC报告轮询触发帧包括帧控制字段、持续时间字段、接收地址、发送地址、公共信息字段、用户信息列表、填充字段和FCS字段。
可选地，所述帧控制字段用于指示协议版本、帧类型/子类型(指示帧类型为控制帧，子类型为触发帧)等信息。所述持续时间字段指示接下来的帧交换序列的持续时间。所述接收地址设置为广播地址。所述发送地址设置为发送方的地址。所述公共信息中字段指示触发帧的类型，指示请求的HE TB PPDU 的长度信息，指示上行带宽，还指示AP的发送功率，所以该流程不仅可以请求STA发送TPC报告，还可以间接的向STA指示TPC报告。其中，公共信息字段中的触发相关公共信息(Trigger Dependent Common Info，TDCI)子字段不存在，并且，公共信息字段中触发类型子字段指示该触发帧为TPC报告轮询触发帧。
可选地，所述用户列表信息则指示了所有被触发进行TPC报告的STA的一些用户信息，比如AID信息，RU分配信息，MCS信息等。其中，用户信息列表中的触发相关用户信息(Trigger Dependent User Info，TDUI)子字段不存在。触发帧中的填充字段可选地存在，以扩展帧长度给予接收者STAs足够的时间，以便在接收到帧之后的SIFS时间发送响应。FCS(Frame Check Sequence)字段用于帧校验。
在操作S4002中，接收多个包括TPC报告控制字段的响应帧，所述TPC报告控制字段指示发送所述响应帧的第一发射功率。
可选地，当STA接收到AP发送的TPC报告轮询触发帧后，STA依次判断是否支持TPC报告轮询触发帧，以及TPC报告轮询触发帧中是否包含STA对应的AID的12LSBs。在上述判断结果均为是的情况下，STA生成HE TB PPDU，使STA通过TPC报告控制字段向AP上报TPC报告信息。
STA依次判断是否支持TPC报告轮询触发帧，以及TPC报告轮询触发帧中是否包含STA对应的AID的12LSBs。若STA支持TPC报告轮询触发帧且TPC报告轮询触发帧中包含STA对应的AID的12LSBs，STA向AP上报TPC报告信息。若STA不支持TPC报告轮询触发帧，则STA不响应该触发帧，在这种情况下，AP可以使用协议中定义的请求帧，如通过发送TPC请求帧或链路测量请求帧来请求TPC报告信息。当然本公开并不以此为限。
可选地，所述响应帧为HE TB PPDU，其中，HE TB PPDU包括TPC报告控制字段，STA通过TPC报告控制字段向AP上报TPC报告信息，TPC报告信息包括发送所述响应帧的第一发射功率。当然本公开并不以此为限。
可选地，其中，TPC报告控制字段的格式如图2所示。可选地，STA在接收到AP发送的TPC报告轮询触发帧时，将TPC报告轮询触发帧的接收电 平记为P_RX1，以及其自身的接收机灵敏度记为Rx_Sensitivity，即链路裕度Link Margin＝P_RX1-Rx_Sensitivity。接着，STA将自身的发射功率和所述链路裕度填充至TPC报告信息中。之前已经参考图2详细地描述了TPC报告控制字段的细节，因此本公开在此不再赘述。
在操作S4003中，以第二发射功率传输MPDU，所述第二发射功率至少部分地基于所述第一发射功率。
可选地，所述以第二发射功率传输MPDU包括：基于所述TPC报告控制字段中的第一发射功率和所述响应帧的接收功率，确定路径损耗；基于所述TPC报告信息中的链路裕度字段，确定所述链路裕度；以及基于所述路径损耗和所述链路裕度，确定第二发射功率。
可选地，当AP接收到STA发送的HE TB PPDU后，由于HE TB PPDU包括TPC报告控制字段，则AP直接对HE TB PPDU进行解析得到TPC报告控制字段，进而通过TPC报告控制字段中的发射功率字段和链路裕度字段来确定TPC报告信息。例如，AP将提取TPC报告信息中的发射功率(也即第一发射功率)，然后将发射功率和HE TB PPDU的接收功率进行作差，得到第二差值，并将第二差值作为路径损耗。具体的，设STA上报的TPC报告控制字段中指示的发射功率为P_TX，HE TB PPDU的接收功率为P_RX2，则路损功率P_L＝P_TX-P_RX2。由此，AP可以基于该路损功率和链路裕度字段中的信息来确定第二发射功率。
又例如，如果AP发现链路裕度字段中的信息为空，则AP还可能以以下方案确定链路裕度：将TPC报告轮询触发帧的接收电平与接收TPC报告轮询触发帧对应的接收机的灵敏度作差，得到第一差值，并将第一差值作为链路裕度。由此，AP可以基于该路损功率和所计算的链路裕度来确定第二发射功率。当然本公开并不以此为限。
由此，根据本公开实施例的方法4000使得AP能够同时向多个相关联的STA请求TPC信息，从而避免了链路不必要的消耗。
接下来，结合图5至图9进一步描述本公开的一些具体实施例。其中，图5是根据本公开的实施例提供的一种发射功率调整方法的实现流程图。图6是根据本公开的实施例提供的一种发射功率调整方法的实现流程图。图7是根据本公开的实施例提供的一种发射功率调整方法的又一实现流程图。
如图5所示，本公开还提供了一种发射功率调整方法50，包括以下步骤。
步骤S501：判断是否达到预设时刻。
其中，预设时刻是指上报TPC信息的时间，此预设时刻可以根据具体需求进行设定。若每天的12点和16点需要进行TPC信息的上报，则将预设时刻设置为12点和16点。若每30min上报一次TPC信息，则可设定后一次上报时刻比前一次上报时刻多30min。
步骤S502：若达到预设时刻，判断是否竞争到信道或收到基本触发帧、缓冲状态报告轮询触发帧、波束成形报告轮询触发帧和带宽询问报告轮询触发帧中的任意一项中的任意一个。
根据本公开实施例的定时主动上报TPC信息，需要先对时间进行判断，如果到达设定的预设时刻，之后再判断是竞争到信道还是收到基本触发帧、缓冲状态报告轮询触发帧、波束成形报告轮询触发帧和带宽询问报告轮询触发帧中的任意一项，从而将包含TPC信息的TPC报告控制字段设置于不同类型的帧中，以进行TPC信息的上报。其中，如果竞争到信道，则可通过主动上报的方式，将TPC报告控制字段设置于如数据帧中等。如果收到基本触发帧、缓冲状态报告轮询触发帧、波束成形报告轮询触发帧和带宽询问报告轮询触发帧中的任意一项，则需要根据基本触发帧、缓冲状态报告轮询触发帧、波束成形报告轮询触发帧和带宽询问报告轮询触发帧中的任意一项进行响应，以将TPC报告控制字段设置于响应帧中。
步骤S503：若竞争到信道与收到响应触发帧中的任意一个，通过TPC报告控制字段报告第一发射功率；
步骤S504：基于第一发射功率，计算路径损耗，以通过路径损耗调节第二发射功率。
本公开设置两端，分别为AP端和STA端。本公开在竞争到信道与响应目标帧中的任意一个的情况下，AP端和STA端不需互相请求，则可通过TPC报告控制字段报告第一发射功率，以基于第一发射功率来调整第二发射功率，保障了在链路发生问题的情况下，也可及时上报第一发射功率，以实现自适应调节第二发射功率。
由于TPC报告控制字段可主动指示TPC报告信息，则可将TPC报告控制字段设置于目标帧或响应帧中，以实现主动上报TPC报告信息，以调整第二发射功率的目标。
AP端和STA端相互上报TPC报告信息包括：第一种情况：AP端主动向 STA端上报TPC报告信息，使STA端基于TPC报告信息中的第一发射功率调整第二发射功率。第二种情况，STA端主动向AP端上报TPC报告信息，使AP端基于TPC报告信息中的第一发射功率调整第二发射功率。
在一具体实施例中，结合图6，AP端主动向STA端上报TPC报告信息，使STA端基于TPC报告信息中的第一发射功率调整第二发射功率的执行步骤包括：若AP通过EDCA竞争到信道，向STA发送目标帧，待STA接收到目标帧后，对目标帧进行解析，得到TPC报告控制字段，然后STA对TPC报告控制字段进行提取，得到第一发射功率，再将第一发射功率和目标帧的接收功率进行作差，得到差值，最后将差值作为路径损耗，以通过路径损耗调节第二发射功率，其中，第二发射功率用于表征向对端设备进行消息传输的发射功率。其中，目标帧包括QoS Data帧、QoS Null帧和管理帧中的至少之一。
STA端主动向AP端上报TPC报告信息，使STA端基于TPC报告信息中的第一发射功率调整第二发射功率包括两种方式：第一种方式，STA竞争到信道，主动向AP端上报TPC报告信息，使STA端基于TPC报告信息中的第一发射功率调整第二发射功率。第二种方式，STA响应触发帧，主动向AP端上报TPC报告信息，使STA端基于TPC报告信息中的第一发射功率调整第二发射功率。
在一具体实施例中，结合图7，STA竞争到信道，主动向AP端上报TPC报告信息，使STA端基于TPC报告信息中的第一发射功率调整第二发射功率的执行步骤包括：若STA通过EDCA竞争到信道，向AP发送目标帧，待AP接收到目标帧后，对目标帧进行解析，得到TPC报告控制字段，然后对TPC报告控制字段进行提取，得到第一发射功率，再将第一发射功率和目标帧的接收功率进行作差，得到差值，最后将差值作为路径损耗，以通过路径损耗调节第二发射功率，其中，第二发射功率用于表征向对端设备进行消息传输的发射功率。其中，目标帧包括QoS Data帧、QoS Null帧和管理帧中的至少之一。
在另一具体实施例中，结合图7，STA响应触发帧，主动向AP端上报TPC报告信息，使STA端基于TPC报告信息中的第一发射功率调整第二发射功率的执行步骤包括：若STA响应触发帧，向AP发送触发帧对应的响应帧，待AP接收到响应帧后，对响应帧进行解析，得到TPC报告控制字段，然后对TPC报告控制字段进行提取，得到第一发射功率，再将第一发射功率和响应帧的接收功率进行作差，得到差值，最后将差值作为路径损耗，以通过路径 损耗调节第二发射功率，其中，第二发射功率用于表征向对端设备进行消息传输的发射功率。其中，响应帧为除MU-RTS触发帧和TPC报告轮询触发帧之外的触发帧，可为基本触发帧、缓冲状态报告轮询触发帧、带宽询问报告轮询触发帧等。
需要说明的是，在上述实施例中，如果是STA收到了AP发送的TPC报告信息，则第二发射功率用于表征向对端设备进行消息传输的发射功率，其中，对端设备指与STA关联的AP；如果是AP收到了STA发送的TPC报告信息，则第二发射功率用于表征向对端设备进行消息传输的发射功率，其中，对端设备指与AP关联的STA。
根据本公开实施例的方法50，在AP或STA在未经请求的情况下，通过TPC报告控制字段主动上报TPC信息，其中TPC信息包括第一发射功率，以及时获取第一发射功率，并基于第一发射功率调整第二发射功率，保障在链路出现问题的情况下，也可自适应调整发射功率。
图8是根据本公开实施例的一种发射功率调整方法的实现流程图。图9是根据本公开实施例的一种发射功率调整方法的实现示意图。
如图8所示，提供了一种发射功率调整方法80，包括以下步骤。
步骤S801：STA接收AP发送的TPC报告轮询触发帧。TPC报告轮询触发帧的细节已经参考图4B进行了详细描述，本公开在此不再赘述。
步骤S802：基于TPC报告轮询触发帧，向AP上报TPC报告信息。
结合图9，当STA接收到AP发送的TPC报告轮询触发帧后，STA依次判断是否支持TPC报告轮询触发帧，以及TPC报告轮询触发帧中是否包含STA对应的AID的12LSBs。在上述判断结果均为是的情况下，STA生成HE TB PPDU，使STA通过TPC报告控制字段向AP上报TPC报告信息。
STA依次判断是否支持TPC报告轮询触发帧，以及TPC报告轮询触发帧中是否包含STA对应的AID的12LSBs，具体执行步骤如下：STA判断是否支持TPC报告轮询触发帧，得到第一判断结果，然后基于第一判断结果，向AP上报TPC报告信息。
进一步的，基于第一判断结果，向AP上报TPC报告信息包括：若第一判断结果为是，STA判断TPC报告轮询触发帧中是否包含STA对应的AID的12LSBs，得到第二判断结果，然后基于第二判断结果，向AP上报TPC报告信息；若第一判断结果为否，则STA不响应该触发帧，在这种情况下，AP 可以使用协议中定义的请求帧，如通过发送TPC请求帧或链路测量请求帧来请求TPC报告信息。
更进一步的，基于第二判断结果，向AP上报TPC报告信息包括：若第二判断结果为是，STA生成HE TB PPDU，其中，HE TB PPDU包括TPC报告控制字段，然后STA通过TPC报告控制字段向AP上报TPC报告信息。
步骤S803：AP基于TPC报告信息，确定路径损耗和链路裕度，并基于路径损耗和链路裕度调节目标发射功率，其中，目标发射功率用于表征向STA进行消息传输的发射功率。
当AP接收到STA发送的HE TB PPDU后，由于HE TB PPDU包括TPC报告控制字段，则AP直接对HE TB PPDU进行解析得到TPC报告控制字段，进而通过TPC报告控制字段中的发射功率字段和链路裕度字段来确定TPC报告信息。
为了实现向STA进行消息传输的发射功率的自适应调节，STA需确定链路裕度信息，AP还需基于TPC报告信息，确定路径损耗。
对于路径损耗的确定，可基于TPC报告信息和HE TB PPDU的接收功率，确定路径损耗。执行步骤如下：先提取TPC报告信息中的发射功率，然后将发射功率和HE TB PPDU的接收功率进行作差，得到第二差值，并将第二差值作为路径损耗。
具体的，设STA上报的TPC报告控制字段中指示的发射功率为P_TX，HE TB PPDU的接收功率为P_RX1，则路损功率P_L＝P_TX-P_RX1。
而对于链路裕度的确定，执行步骤如下：将TPC报告轮询触发帧的接收电平与接收TPC报告轮询触发帧对应的接收机的灵敏度作差，得到第一差值，并将第一差值作为链路裕度。
具体的，STA在接收到AP发送的TPC报告轮询触发帧时，将TPC报告轮询触发帧的接收电平记为P_RX2，以及其自身的接收机灵敏度记为Rx_Sensitivity，即链路裕度Link Margin＝P_RX2-Rx_Sensitivity。
由此，本公开实施例提供了一种发射功率调整方法，包括：STA接收AP发送的TPC报告轮询触发帧，并基于TPC报告轮询触发帧，向AP上报TPC报告信息，然后AP基于TPC报告信息，确定路径损耗和链路裕度，并基于路径损耗和链路裕度调节目标发射功率。本公开中AP可以向一个或多个STA同时发送TPC报告轮询触发帧，以获取一个或多个STA上报的TPC信息， 并基于TPC信息确定路径损耗和链路裕度，进而基于路径损耗和链路裕度调节目标发射功率，不仅适用于一个AP同时向多个相关联的STA请求TPC信息的场景，还避免了链路不必要的消耗。
此外，本公开还提供了一种发射功率调节装置包括第一判断模块、第二判断模块、功率上报模块和功率调节模块，具体如下：第一判断模块，用于判断是否达到预设时刻；第二判断模块，用于若达到预设时刻，判断是否竞争到信道与收到响应触发帧中的任意一个；功率上报模块，用于若竞争到信道与收到响应触发帧中的任意一个，通过TPC报告控制字段报告第一发射功率；功率调节模块，用于基于第一发射功率，计算路径损耗，以通过路径损耗调节第二发射功率。
在一种可能的实现方式中，功率上报模块包括：第一发送子模块，用于若AP通过EDCA竞争到信道，向STA发送目标帧；第一解析子模块，用于待STA接收到目标帧后，对目标帧进行解析，得到TPC报告控制字段；第一信息提取子模块，用于对TPC报告控制字段进行提取，得到第一发射功率。
在一种可能的实现方式中，功率上报模块包括：第二发送子模块，用于若STA通过EDCA竞争到信道，向AP发送目标帧；第二解析子模块，用于待AP接收到目标帧后，对目标帧进行解析，得到TPC报告控制字段；第二信息提取子模块，用于对TPC报告控制字段进行提取，得到第一发射功率。
在一种可能的实现方式中，功率调节模块包括：第一计算子模块，用于将第一发射功率和目标帧的接收功率进行作差，得到差值；第一调节子模块，用于将差值作为路径损耗，以通过路径损耗调节第二发射功率，其中，第二发射功率用于表征向对端设备进行消息传输的发射功率。
在一种可能的实现方式中，目标帧包括QoS Data帧、QoS Null帧和管理帧中的至少之一。
在一种可能的实现方式中，功率上报模块包括：第三发送模块，用于若STA响应触发帧，向AP发送触发帧对应的响应帧；第三解析模块，用于待AP接收到响应帧后，对响应帧进行解析，得到TPC报告控制字段；第三信息提取模块，用于对TPC报告控制字段进行提取，得到第一发射功率。在一种可能的实现方式中，功率调节模块54包括：第二计算子模块，用于将第一发射功率和响应帧的接收功率进行作差，得到差值；第二调节子模块，用于将差值作为路径损耗，以通过路径损耗调节第二发射功率，其中，第二发射功率用 于表征向对端设备进行消息传输的发射功率。
在一种可能的实现方式中，TPC报告控制字段包括控制ID、第一发射功率和链路裕度信息。
此外，本公开还提供了一种发射功率调节装置包括请求接收模块、信息上报模块和功率调节模块，具体如下：请求接收模块，用于STA接收AP发送的TPC报告轮询触发帧；信息上报模块，用于基于TPC报告轮询触发帧，向AP上报TPC报告信息；功率调节模块，用于AP基于TPC报告信息，确定路径损耗和链路裕度，并基于路径损耗和链路裕度调节目标发射功率，其中，目标发射功率用于表征向STA进行消息传输的发射功率。
在一种可能的实现方式中，信息上报模块包括：判断子模块，用于STA判断是否支持TPC报告轮询触发帧，得到第一判断结果；决策子模块，用于基于第一判断结果，向AP上报TPC报告信息。在一种可能的实现方式中，决策子模块包括：判断单元，用于若第一判断结果为是，STA判断TPC报告轮询触发帧中是否包含STA对应的AID的12LSBs，得到第二判断结果；决策单元，用于基于第二判断结果，向AP上报TPC报告信息。
在一种可能的实现方式中，决策单元包括：生成子单元，用于若第二判断结果为是，STA生成HE TB PPDU，其中，HE TB PPDU包括TPC报告控制字段；上报子单元，用于STA通过TPC报告控制字段向AP上报TPC报告信息。
在一种可能的实现方式中，功率调节模块包括：路径损耗计算子模块，用于基于TPC报告信息和HE TB PPDU的接收功率，确定路径损耗；链路裕度获取子模块，用于读取TPC报告信息中的链路裕度字段，并基于链路裕度字段确定链路裕度；功率调节子模块，用于基于路径损耗和链路裕度调节目标发射功率。在一种可能的实现方式中，路径损耗计算子模块包括：功率提取单元，用于提取TPC报告信息中的发射功率；路径损耗计算单元，用于将发射功率和HE TB PPDU的接收功率进行作差，得到第二差值，并将第二差值作为路径损耗。
在一种可能的实现方式中，TPC报告轮询触发帧包括帧控制字段、持续时间字段、接收地址、发送地址、公共信息字段、用户信息列表、填充字段和FCS字段。
图10是本发明实施例提供的AP的示意图。如图10所示，该实施例的 AP 6包括：处理器61、存储器62以及存储在存储器62中并可在处理器61上运行的计算机程序63。处理器61执行计算机程序63时实现上述各个发射功率调节方法实施例中的步骤，
本公开还提供一种可读存储介质，可读存储介质中存储有计算机程序，计算机程序被处理器执行时用于实现上述的各种实施方式提供的方法。
其中，可读存储介质可以是计算机存储介质，也可以是通信介质。通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。计算机存储介质可以是通用或专用计算机能够存取的任何可用介质。例如，可读存储介质耦合至处理器，从而使处理器能够从该可读存储介质读取信息，且可向该可读存储介质写入信息。当然，可读存储介质也可以是处理器的组成部分。处理器和可读存储介质可以位于专用集成电路(Application Specific Integrated Circuits，简称：ASIC)中。另外，该ASIC可以位于用户设备中。当然，处理器和可读存储介质也可以作为分立组件存在于通信设备中。可读存储介质可以是只读存储器(ROM)、随机存取存储器(RAM)、CD-ROM、磁带、软盘和光数据存储设备等。
本公开还提供一种程序产品，该程序产品包括执行指令，该执行指令存储在可读存储介质中。设备的至少一个处理器可以从可读存储介质读取该执行指令，至少一个处理器执行该执行指令使得设备实施上述的各种实施方式提供的智能天线调度方法。
在上述设备的实施例中，应理解，处理器可以是中央处理单元(英文：Central Processing Unit，简称：CPU)，还可以是其他通用处理器、数字信号处理器(英文：Digital Signal Processor，简称：DSP)、专用集成电路(英文：Application Specific Integrated Circuit，简称：ASIC)等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本公开所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
以上实施例仅用以说明本公开的技术方案，而非对其限制；尽管参照前述实施例对本公开进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本公开各实施例技术方案的精神和范围，均应包含在本公开的保护范围之内。

Claims (15)

  1. 一种发射功率调整方法，包括：
    响应于竞争到信道，发送包括发射功率控制(TPC)报告控制字段的目标帧，其中，所述目标帧是QoS Data帧、QoS Null帧和管理帧中的任一项，所述TPC报告控制字段指示发送所述目标帧的第一发射功率；以及
    接收MAC层协议数据单元(MPDU)，其中传输所述MPDU的第二发射功率至少部分地基于所述第一发射功率。
  2. 如权利要求1所述的方法，其中，所述发送包括发射功率控制(TPC)报告控制字段的目标帧还包括：
    响应于达到预设时刻或检测到链路情况变化，发送包括发射功率控制(TPC)报告控制字段的目标帧。
  3. 如权利要求1所述的方法，其中，所述TPC报告控制字段包括控制ID和TPC报告信息，所述TPC报告信息包括第一发射功率和链路裕度信息，所述控制ID指示所述目标帧中携带的控制字段为TPC报告控制字段。
  4. 如权利要求1所述的方法，其中，所述QoS Data帧、QoS Null帧和管理帧的帧控制字段中的+HTC/Order subfield子字段指示存在HT控制字段，并且所述HT控制字段的B0和B1位均为1，所述HT控制字段中的A-Control子字段包括一个或多个控制子字段，所述控制子字段中的一个控制子字段为所述TPC报告控制字段。
  5. 如权利要求1所述的方法，其中，所述第二发射功率的确定包括：
    基于所述TPC报告控制字段，确定第一发射功率；
    将第一发射功率和目标帧的接收功率进行作差，得到差值；
    将差值作为路径损耗；以及
    基于所述路径损耗，确定所述第二发射功率。
  6. 如权利要求1所述的方法，其中，所述方法由AP或STA执行。
  7. 一种发射功率调整方法，包括：
    发送基本触发帧、缓冲状态报告轮询触发帧、波束成形报告轮询触发帧和带宽询问报告轮询触发帧中的任意一项；
    接收包括TPC报告控制字段的响应帧，所述TPC报告控制字段指示发送所述响应帧的第一发射功率；以及
    以第二发射功率传输MPDU，所述第二发射功率至少部分地基于所述第一发射功率。
  8. 如权利要求7所述的方法，其中，所述响应帧为高效率基于触发的物理层协议数据单元(HE TB PPDU)，所述TPC报告控制字段位于HE TB PPDU的控制字段中。
  9. 如权利要求8所述的方法，其中，所述响应帧是由STA发送的，所述响应帧的生成包括：
    响应于达到预设时刻或检测到链路情况变化，生成所述包括TPC报告控制字段的响应帧。
  10. 如权利要求8所述的方法，其中，所述以第二发射功率传输MPDU包括：
    对所述响应帧进行解析，得到TPC报告控制字段；
    对TPC报告控制字段进行提取，得到第一发射功率；
    将第一发射功率和响应帧的接收功率进行作差，得到差值；以及
    将所述差值作为路径损耗，以通过所述路径损耗调节第二发射功率。
  11. 一种发射功率调整方法，包括：
    发送TPC报告轮询触发帧，所述TPC报告轮询触发帧用于触发多个STA上报TPC报告信息；
    接收多个包括TPC报告控制字段的响应帧，所述TPC报告控制字段指示发送所述响应帧的第一发射功率；以及
    以第二发射功率传输MPDU，所述第二发射功率至少部分地基于所述第一 发射功率。
  12. 如权利要求11所述的方法，其中，所述TPC报告轮询触发帧包括所述多个STA对应的AID的12LSBs。
  13. 如权利要求11所述的方法，其中，所述响应帧为HE TB PPDU，其中，所述HE TB PPDU包括TPC报告控制字段。
  14. 如权利要求11所述的方法，其中，所述以第二发射功率传输MPDU包括：
    基于所述TPC报告控制字段中的第一发射功率和所述响应帧的接收功率，确定路径损耗；
    基于所述TPC报告信息中的链路裕度字段，确定所述链路裕度；以及
    基于所述路径损耗和所述链路裕度，确定第二发射功率。
  15. 一种无线AP，包括存储器、处理器以及存储在所述存储器中并可在所述处理器上运行的计算机程序，其特征在于，所述处理器执行所述计算机程序时实现如权利要求1-14中的任意一项所述的方法。
PCT/CN2023/107740 2022-08-04 2023-07-17 发射功率调整方法 WO2024027494A1 (zh)

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