WO2021174996A1 - Method and apparatus for determining channel sounding strategy, ap device and storage medium - Google Patents

Abstract

Disclosed are a method and an apparatus for determining a channel sounding strategy, an AP device and a storage medium, relating to the field of wireless technology. Said method comprises: an AP acquiring radio frequency nonlinear performance of a station (STA); and the AP determining, on the basis of reference factors, a sounding strategy used for performing channel sounding on a communication channel between the AP and the STA, the reference factors comprising the radio frequency nonlinear performance and transmission power of the STA. The present application can determine a channel sounding strategy with reference to radio frequency nonlinear performance of an STA, avoiding the effect on the accuracy of channel sounding due to poor radio frequency nonlinear performance of the STA, and effectively ensuring the accuracy of channel sounding.

Description

Method and device for determining channel detection strategy, AP equipment and storage medium

This application claims the priority of a Chinese patent application filed on March 3, 2020 with the application number 202010138446.6 and the invention title "Method and device for determining channel detection strategy, AP equipment and storage medium", the entire content of which is incorporated by reference In this application.

Technical field

This application relates to the field of wireless technology, and in particular to a method and device for determining a channel detection strategy, AP equipment, and storage medium.

Background technique

An access point (access point, AP) may adopt an implicit channel detection strategy to perform channel detection on the downlink channel between the AP and the station (station, STA).

However, the implicit channel detection strategy requires a higher linearity of the signal sent by the STA. When the STA's radio frequency nonlinear performance is poor, the accuracy of the channel detection will be lower.

Summary of the invention

This application provides a method and device for determining a channel detection strategy, AP equipment, and storage medium, which can solve the problem of low channel detection accuracy in related technologies. The technical solutions provided by this application are as follows:

In the first aspect, this application provides a method for determining a channel sounding strategy. The method includes: the AP obtains the radio frequency nonlinear performance of the station STA; the AP determines the channel sounding method for the communication channel between the AP and the STA based on reference factors The used detection strategy, reference factors include: STA's radio frequency non-linear performance and transmit power.

Obtain the radio frequency nonlinear performance of the STA through the AP, and determine the detection strategy used for channel detection of the communication channel between the AP and the STA based on the reference factors including the radio frequency nonlinear performance and the STA's transmit power. With regard to related technologies, the AP can determine the channel detection strategy with reference to the radio frequency non-linear performance and the transmission power of the STA, which can avoid the influence of the poor radio frequency non-linear performance of the STA on the channel detection accuracy, and can effectively ensure the accuracy of the channel detection.

Correspondingly, it can effectively ensure the distributed multiple input multiple output (D-MIMO) performance when multiple APs work together. Moreover, since the AP can flexibly determine the channel detection strategy according to the STA's radio frequency non-linear performance and transmission power, the channel detection accuracy and air interface overhead are optimized.

Optionally, the AP determines the implementation process of the detection strategy used for channel detection of the communication channel between the AP and the STA based on the reference factors, including: the AP selects the detection strategy from the detection strategy set based on the reference factor, where the detection The strategy set includes implicit channel detection strategy and explicit channel detection strategy. The requirement of implicit channel detection strategy for STA's radio frequency nonlinear performance is higher than that of explicit channel detection strategy for STA's radio frequency nonlinear performance.

Further, the conditions required by the implicit channel detection strategy or the revealed channel detection strategy can be estimated by reference factors, and the condition can be expressed by the power range. Correspondingly, the implementation process of the AP selecting the detection strategy in the detection strategy set based on the reference factor may include: the AP calculates the transmission power range of the STA allowed by the implicit channel detection strategy based on the reference factor, and the transmission power range has a non- Zero upper limit; when the transmission power of the STA is within the transmission power range, the AP adopts an implicit channel detection strategy to perform channel detection on the communication channel.

Optionally, when the transmission power of the STA is outside the transmission power range, the AP adopts an explicit channel detection strategy to perform channel detection on the communication channel. Alternatively, when the transmission power of the STA is outside the transmission power range, the AP may also refer to other factors to determine the implicit channel detection strategy or the explicit channel detection strategy.

In the first achievable way of calculating the transmission power range, when the reference factor includes the radio frequency nonlinear performance, and the radio frequency nonlinear performance is reflected by the radio frequency nonlinear parameter, the value of the radio frequency nonlinear parameter of the STA can be determined as The upper limit of the transmit power range.

In the second achievable way of calculating the transmission power range, the transmission power range can not only refer to the radio frequency nonlinear performance of the STA, but also refer to the compensation parameter that compensates the radio frequency nonlinear performance of the STA, and the compensation parameter can be used Compensation value representation. At this time, the upper limit of the transmission power range of the STA allowed by the implicit channel detection strategy can be determined according to the radio frequency nonlinear performance of the STA and the compensation value. For example, the upper limit may be the sum of the radio frequency nonlinear parameter of the STA and the compensation value.

Optionally, the compensation parameter may include the non-linear compensation capability value of the AP, and the upper limit may be equal to the sum of the radio frequency non-linear parameter of the STA and the non-linear compensation capability value of the AP.

Moreover, because when multiple STAs send signals to the AP at the same time, for example, when there are multiple STAs performing channel sounding with the AP, the transmission power of each STA of the multiple STAs sending test signals is higher than that of only one STA sending a test signal. The transmission power of the signal is small. Therefore, the reference factor may also include other factors such as the total number of all STAs performing channel sounding with the AP at the same time.

When the reference factor also includes other factors, the transmission power range of the STA allowed by the implicit channel sounding strategy can be adjusted according to the influence of the other factors on the transmission power of the STA, so that it can be accurately determined according to the adjusted transmission power range Channel detection strategy to ensure the accuracy of channel detection.

Among them, the radio frequency nonlinear performance can be reflected by radio frequency nonlinear parameters. The radio frequency nonlinearity parameter may indicate the boundary point between the radio frequency linear region and the radio frequency nonlinear region of the STA. For example, the radio frequency nonlinear parameters include one or more of the following: 1 decibel compression point, 3 decibel compression point, and third-order intermodulation intercept point of the radio frequency power amplifier (also called power amplifier) of the STA.

Moreover, when the radio frequency non-linear parameter includes the 1 decibel compression point of the STA's radio frequency power amplifier, the upper limit of the transmission power range of the STA allowed by the implicit channel detection strategy can be the sum of the 1 decibel compression point and the compensation value. Including AP's non-linear compensation capability value.

In an achievable way, since the STA needs to complete the entire process of service discovery, link authentication, terminal association, and access authentication on the AP in accordance with the provisions of the 802.11 communication protocol, data can be transmitted on the air interface. The non-linear performance reporting function is added in the terminal association phase. Therefore, the implementation process for the AP to obtain the radio frequency nonlinear performance of the station STA may include: the AP extracts the radio frequency nonlinear parameter from the association request from the STA, and the radio frequency nonlinear parameter reflects the radio frequency nonlinear performance of the STA.

Optionally, a field carrying radio frequency nonlinear parameters may be set in the association request. This field can be encoded in a type-length-value encoding format, and the element identifier assigned to this field can occupy 1 byte, the length of this field can be 1 byte, and the size of the content of the radio frequency nonlinear parameter can be 1 byte.

In a second aspect, the present application provides a device for determining a channel sounding strategy. The device includes: an acquisition module for acquiring the radio frequency nonlinear performance of a station STA; a determination module for determining the difference between the AP and the STA based on reference factors The detection strategy used for channel detection on the inter-communication channel. The reference factors include the radio frequency non-linear performance of the STA and the transmission power.

Optionally, the determining module is specifically configured to: select a detection strategy from a detection strategy set based on the reference factors, where the detection strategy set includes an implicit channel detection strategy and an explicit channel detection strategy, and the implicit channel detection strategy pair The requirement of STA's radio frequency non-linear performance is higher than the requirement of explicit channel sounding strategy for STA's radio frequency non-linear performance.

Optionally, the determining module is specifically used to: calculate the transmission power range of the STA allowed by the implicit channel sounding strategy based on reference factors, the transmission power range has a non-zero upper limit; when the transmission power of the STA is within the transmission power range At the time, the implicit channel detection strategy is adopted to perform channel detection on the communication channel.

Optionally, the determining module is specifically used for: when the transmission power of the STA is outside the transmission power range, an explicit channel detection strategy is adopted to perform channel detection on the communication channel.

Optionally, the reference factor also includes: the total number of all STAs that perform channel sounding with the AP simultaneously with the STA.

Optionally, the radio frequency nonlinear performance of the STA is reflected by radio frequency nonlinear parameters, and the radio frequency nonlinear parameters are used to indicate the boundary point between the radio frequency linear region and the radio frequency nonlinear region of the STA.

Optionally, the radio frequency non-linear parameters include one or more of the following: 1 decibel compression point, 3 decibel compression point, and third-order intermodulation intercept point of the radio frequency power amplifier of the STA.

Optionally, when the radio frequency non-linear parameter includes the 1 decibel compression point of the STA's radio frequency power amplifier, the upper limit of the transmission power range of the STA allowed by the implicit channel detection strategy is the sum of the 1 decibel compression point and the compensation value, and the compensation value Including AP's non-linear compensation capability value.

Optionally, the acquiring module is specifically used to extract radio frequency nonlinear parameters from the association request from the STA, and the radio frequency nonlinear parameters reflect the radio frequency nonlinear performance of the STA.

In a third aspect, the present application provides an AP device, including a processor and a memory, and a computer program is stored in the memory; when the processor executes the computer program, the AP device implements the method for determining a channel detection strategy provided in the first aspect.

In a fourth aspect, the present application provides a storage medium. When instructions in the storage medium are executed by a processor, the method for determining a channel detection strategy provided in the first aspect is implemented.

In a fifth aspect, the present application provides a computer program product that, when running on a computing device, causes the computing device to execute the method for determining a channel detection strategy provided in the first aspect.

Description of the drawings

FIG. 1 is a schematic diagram of an implementation environment involved in a method for determining a channel sounding strategy provided by an embodiment of the present application;

Figure 2 is a flowchart of a method for determining a channel sounding strategy provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a method for an AP to determine a detection strategy used for channel detection of a communication channel between an AP and an STA based on reference factors according to an embodiment of the present application;

4 is a structural block diagram of a device for determining a channel sounding strategy provided by an embodiment of the present application;

Fig. 5 is a schematic structural diagram of an AP device provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions, and advantages of the present application clearer, the implementation manners of the present application will be described in further detail below in conjunction with the accompanying drawings.

FIG. 1 is a schematic diagram of an implementation environment involved in a method for determining a channel sounding strategy provided by an embodiment of the application. As shown in Figure 1, the implementation environment may include: AP 01 and one or more STA 02. Each STA 02 and AP 01 are connected through WLAN. AP 01 can access the wired network and provide a wireless interface to STA 02. STA 02 can access the network through the wireless interface provided by AP 01, and then communicate with other network devices through the network. Among them, FIG. 1 is a schematic diagram of the implementation environment including multiple STA 02.

AP 01 may be a site device or a network device with a WLAN chip. STA 02 can be mobile phones, tablet computers, set-top boxes, smart TVs, smart wearable devices, wireless access points, in-vehicle communication devices, and computers.

In this embodiment of the application, AP 01 can obtain the radio frequency nonlinear performance of STA 02, and determine the communication channel between AP 01 and STA 02 based on reference factors including the radio frequency nonlinear performance and the transmission power of the STA. The detection strategy used for channel detection, for example, it is determined to adopt an implicit channel detection strategy or an explicit channel detection strategy, so as to perform channel detection on the communication channel between AP 01 and STA 02 according to the detection strategy. In this way, AP 01 can refer to the radio frequency non-linear performance and transmission power of STA 02 to determine the channel detection strategy, which can avoid the influence of poor radio frequency non-linear performance of STA 02 on the channel detection accuracy.

Channel probing on the communication channel between the AP and the STA is essentially a process of acquiring the downlink channel matrix of the downlink channel used by the AP to send signals to the STA. Channel sounding strategies generally include: explicit channel sounding (explict channel sounding) strategies and implicit channel sounding (implict channel sounding) strategies.

The implementation process of the explicit channel detection strategy includes: AP sends a channel detection notification message to the STA to notify the STA that it is ready to start the channel detection operation, and then the AP sends a Null Data Packet (NDP) to the STA, and the STA according to this The NDP determines the downlink channel matrix and sends the downlink channel matrix to the AP.

In this explicit channel sounding strategy, since the STA determines the downlink channel matrix according to the NDP sent by the AP during channel sounding, and the AP has better radio frequency non-linear performance, the accuracy of channel sounding can be guaranteed. However, due to the large overhead of the downlink channel matrix, a large air interface overhead will be caused.

The implementation process of the implicit channel detection strategy includes: AP sends a notification message for channel detection to STA, STA sends an NDP message to AP according to the notification message, AP obtains uplink channel matrix according to the NDP message, and then according to uplink channel matrix and downlink channel The relationship between the matrices, the downlink channel matrix is obtained, and the channel detection process is completed. Among them, the relationship between the uplink channel matrix H _ij and the downlink channel matrix H _ji satisfies: H _ji =1/K _ji *H _ij , K _ji is the calibration matrix between the downlink channel matrix and the uplink channel matrix, K _ji =(T _j /R _j )/(T _i /R _i ), T _i and T _j are the channel matrices of the radio frequency channels of AP and STA transmitters _{respectively, and R i} and R _j are the radio frequency channels of AP and STA receivers respectively Channel matrix.

In this implicit channel detection strategy, since the AP obtains the uplink channel matrix according to the NDP message sent by the STA during channel detection, and then obtains the downlink channel matrix according to the uplink channel matrix, there is no need for the STA to send the downlink channel matrix to the AP. Reduce air interface overhead. However, when the radio frequency nonlinearity of the STA is poor, the accuracy of channel detection will be low.

The following describes the implementation process of the method for determining the channel sounding strategy provided by the embodiment of the present application. Fig. 2 is a flowchart of a method for determining a channel sounding strategy according to an embodiment of the application. As shown in Figure 2, the method may include:

Step 201: The AP obtains the radio frequency non-linear performance of the STA.

Optionally, the radio frequency non-linear performance of STA 02 can be reflected by radio frequency non-linear parameters. In an implementation manner, the radio frequency non-linear parameter may be a parameter indicating the boundary point between the radio frequency linear region and the radio frequency non-linear region of the STA. For example, the radio frequency non-linear parameter may be one or more of the following: 1 dB compression point (1dB compression point), 3 dB compression point (3dB compression point) and third-order intermodulation intercept point of the STA's radio frequency power amplifier. order Intercept point, referred to as the third-order intersection point).

In an implementation manner, the STA may send the radio frequency non-linear parameter to the AP over the air interface, so that the AP can obtain the radio frequency non-linear parameter. In addition, after the AP receives the radio frequency nonlinear parameter sent by the STA, it can record the radio frequency nonlinear parameter, and obtain the radio frequency nonlinear parameter from the record when a channel detection strategy needs to be determined.

According to the provisions of the 802.11 communication protocol, STAs need to complete the entire process of service discovery, link authentication, terminal association, and access authentication on the AP before they can transmit data over the air interface. Therefore, radio frequency nonlinearity can be added to the terminal association phase. Performance reporting function. In this way, the STA can send radio frequency non-linear parameters to the AP during the terminal association process. Correspondingly, the AP can extract the radio frequency non-linear parameters from the association request from the STA, and the association request is used to request the STA to be associated with the AP.

Optionally, the association request may be an association request frame or a re-association request frame. In addition, a field carrying a radio frequency nonlinear parameter may be set in the association request. For example, a radio frequency nonlinear parameter field or a vendor-defined field may be set in the association request. The length of the field carrying the radio frequency nonlinear parameter and the position of the segment in the association request can be determined according to application requirements. For example, this field can be encoded in a type-length-value (type length-value, TLV) encoding format, and the element ID assigned to this field can occupy 1 byte, and the length of this field can be 1 byte , The size of the content of the radio frequency nonlinear parameter can be 1 byte.

Further, the operation of sending radio frequency nonlinear parameters may be sent to the AP during the initial association between the STA and the AP. After the initial association, the AP can record the correspondence between the identification information of the STA and its radio frequency nonlinear parameters, and the STA records that the radio frequency nonlinear parameters have been sent to the AP. When the STA associates with the AP again, the STA may not send the radio frequency nonlinear parameter to the AP, and the AP may search for the radio frequency nonlinear parameter of the STA in the record according to the identification information of the STA. In this way, the air interface overhead can be further reduced.

In another achievable way, AP service providers can count the models of different types of STAs, as well as the radio frequency nonlinear parameters of various types of STAs, and establish the corresponding relationship between the STA model and the radio frequency nonlinear parameters of the STA , And store the corresponding relationship in the AP. When a STA needs to perform channel measurement with the AP, the AP can query the corresponding relationship according to the model of the STA to obtain the radio frequency nonlinear parameters of the STA.

Step 202: The AP determines a detection strategy for channel detection of the communication channel between the AP and the STA based on reference factors, where the reference factors include the STA's radio frequency non-linear performance and transmission power.

Since the reference factor includes the radio frequency nonlinear performance of the STA, it can be determined that the reference factor can reflect the radio frequency nonlinear performance of the STA. In addition, the currently more commonly used channel detection strategies include explicit channel detection strategies and implicit channel detection strategies. Therefore, the implementation process of step 202 may include: the AP selects a detection strategy from the detection strategy set based on reference factors. Among them, the detection strategy set includes an implicit channel detection strategy and an explicit channel detection strategy, and the implicit channel detection strategy requires STA's RF nonlinear performance higher than the explicit channel detection strategy requires STA's RF nonlinear performance . The requirement of channel sounding strategy for radio frequency non-linear performance of the STA refers to the radio frequency non-linear performance that the STA needs to have on the premise of meeting the specified channel detection accuracy.

Moreover, the level of the radio frequency non-linear performance can be expressed by performance indicators. In addition, according to the radio frequency nonlinear performance indicated by the performance index and the transmission power of the STA, the channel strategy used for channel detection can be selected in the detection strategy set. For example, according to the performance index of the STA's radio frequency non-linear performance, when it is determined that the transmission power of the STA meets the performance index requirements required by the implicit channel detection strategy, the implicit channel detection strategy is determined to be used for channel detection, according to the STA's radio frequency non-linear performance When it is determined that the transmission power of the STA meets the performance index requirements required by the explicit channel detection strategy, it is determined to use the explicit channel detection strategy for channel detection.

Optionally, the performance index can be selected according to actual needs. In an implementation manner, since the radio frequency nonlinear performance of the STA can be expressed by the transmission power when the STA transmits a signal, the performance index may be the transmission power when the STA transmits a signal. And generally, when the transmission power of the STA is low, the radio frequency nonlinearity performance of the STA is better, and when the transmission power of the STA is high, the radio frequency nonlinearity performance of the STA is slightly worse. Therefore, when the transmission power of the STA is low, it can be determined to use the channel detection strategy (such as the implicit channel detection strategy) in the detection strategy set that requires higher radio frequency non-linear performance of the STA to perform channel detection, and the transmission power of the STA is larger. At the time, it is determined to use a channel detection strategy (such as an explicit channel detection strategy) in the detection strategy set that has a lower requirement for the STA's radio frequency non-linear performance for channel detection. For example, a power threshold can be set. When the transmission power of the STA is less than the power threshold, the implicit channel detection strategy is used for channel detection, and when the transmission power of the STA is greater than the power threshold, the explicit channel detection strategy is used for channel detection.

It should be noted that the conditions required by the implicit channel detection strategy and the explicit channel detection strategy may also have no obvious dividing line. For example, the first power threshold and the second power threshold can be set, and the first power threshold is less than the second power threshold. When the transmission power of the STA is less than the first power threshold, the implicit channel detection strategy is used for channel detection. When the transmission power is greater than the second power threshold, the explicit channel detection strategy is used for channel detection. When the transmission power of the STA is greater than the first power threshold and less than the second power threshold, you can also refer to other conditions to determine whether to use the implicit channel detection strategy or Explicit channel detection strategy for channel detection.

Further, the requirement of the channel sounding strategy in the sounding strategy set on the radio frequency non-linear performance of the STA can be estimated by reference factors, and the condition can be expressed by the power range. As an example, as shown in Figure 3, taking the requirement of the implicit channel detection strategy for the STA's radio frequency nonlinear performance as an example, the implementation process of selecting the detection strategy in the detection strategy set is explained:

Step 2021: The AP calculates the transmission power range of the STA allowed by the implicit channel sounding strategy based on the reference factors.

Wherein, the transmission power range has a non-zero upper limit and a lower limit, and the lower limit may be zero.

In the first achievable way of calculating the transmission power range, when the reference factor includes the radio frequency nonlinear performance, and the radio frequency nonlinear performance is reflected by the radio frequency nonlinear parameter, the radio frequency nonlinear parameter is used to indicate the radio frequency linear region of the STA Therefore, the value of the radio frequency nonlinear parameter of the STA can be determined as the upper limit of the transmission power range. For example, when the radio frequency non-linear parameter of the STA is 1 decibel compression point, and the 1 decibel compression point of the STA is 26 decibel milliwatts (dBm), the transmission power range of the STA allowed by the implicit channel sounding strategy can be determined The upper limit is 26dBm, that is, the transmission power range is (0, 26dBm).

In the second achievable way of calculating the transmission power range, the transmission power range can not only refer to the radio frequency non-linear parameters of the STA, but also refer to the compensation parameters for compensating the radio frequency non-linear performance of the STA, and the compensation parameters can be adopted Compensation value representation. At this time, the upper limit of the transmission power range of the STA allowed by the implicit channel sounding strategy can be determined according to the radio frequency nonlinear parameter of the STA and the compensation value. For example, the upper limit may be the sum of the radio frequency nonlinear parameter of the STA and the compensation value. The original power on the horizontal axis, the amplified power on the vertical axis,

Optionally, the compensation parameter may include the non-linear compensation capability value of the AP, and the upper limit may be equal to the sum of the radio frequency non-linear parameter of the STA and the non-linear compensation capability value of the AP. Among them, the non-linear compensation ability of the AP refers to the ability of the AP to compensate the non-linear ability of the STA's radio frequency power amplifier. In addition, the nonlinear compensation capability value may be the position of the point where the difference between the nonlinear curve and the linear curve after AP compensation is greater than one decibel, relative to the point where the difference between the nonlinear curve and the linear curve before compensation is greater than one decibel The relative movement distance of the point's position.

For example, suppose that the radio frequency non-linear parameters include the 1 decibel compression point of the STA's radio frequency power amplifier, the 1 decibel compression point of the STA is 26 dBm, and the AP's non-linear compensation capability is 4 dBm, then the STA allowed by the implicit channel detection strategy is adopted The upper limit of the transmit power range is equal to 30dBm.

It should be noted that the reference factors can also include other factors. When the reference factor also includes other factors, the AP may also refer to the other factors to determine the transmission power range. The other factor may be a factor that affects the receiving power of the signal sent by the STA received by the AP. For example, the other factor may be a factor that affects the transmission power of the signal sent by the STA to the AP.

When there are multiple STAs performing channel sounding with the AP at the same time, the transmission power of each STA of the multiple STAs sending test signals to the AP is lower than the transmission power of only one STA sending test signals to the AP, so this other factor can be Including: the total number of all STAs performing channel sounding with the AP at the same time as the STA. Wherein, the test signal sent by any STA to the AP is used to determine the channel parameters of the communication channel between any STA and the AP. For example, the test signal may be a matrix used by the STA to indicate channel parameters sent to the AP during the explicit channel sounding process. Alternatively, the test signal may be a no-data frame sent by the STA to the AP, and the AP may perform channel detection according to the no-data frame.

In addition, when the total number of all STAs that transmit test signals to the AP at the same time is different, the power value that reduces the transmission power of the STA to transmit the test signal is different. For example, when the total number of all STAs that send test signals to the AP at the same time is 2, the transmission power of each STA in the two STAs to send the test signal is 3 dBm lower than the transmission power of only one STA to send the test signal. When the total number of all STAs sending test signals to the AP at the same time is 4, the transmission power of each of the 4 STAs sending the test signal is 6 dBm lower than the transmission power of only one STA sending the test signal.

The AP may obtain the total number of STAs that need to perform channel sounding with the AP, and the AP may determine some or all of the total STAs as STAs that simultaneously perform channel sounding with the AP. And one way for the AP to obtain the total number of STAs that need to perform channel detection with the AP is: the AP counts the first total number of STAs that have sent an association request to the STA and have not been associated with the AP, and counts the number of STAs that have been associated with the AP and The second total number of STAs that have reached the channel refresh period, and the sum of the first total number and the second total number is determined as the total number of STAs that need to perform channel sounding with the AP.

Correspondingly, when the reference factor also includes the total number of all STAs that send test signals to the AP at the same time as the STA, the total number can be based on the radio frequency non-linear parameters of the STA and the power value that reduces the transmission power of the test signal sent by the STA. Calculate the transmission power range of the STA allowed by the implicit channel sounding strategy. Optionally, corresponding to the first achievable way of calculating the transmission power range, the upper limit of the transmission power range may be the value of the radio frequency nonlinear parameter of the STA, and the total power that reduces the transmission power of the STA to transmit the test signal. The sum of values. Corresponding to the second achievable way of calculating the transmission power range, the upper limit of the transmission power range can be the value of the STA's radio frequency nonlinear parameter, the compensation value, and the total power value that reduces the transmission power of the STA to send the test signal. with.

Step 2022: When the transmission power of the STA is within the transmission power range, the AP adopts an implicit channel detection strategy to perform channel detection on the communication channel.

When the transmission power of the STA is within the transmission power range, it indicates that the transmission power of the STA can meet the STA's radio frequency nonlinear performance required by the implicit channel detection strategy. At this time, the AP uses the implicit channel detection strategy to channel the communication channel Probe.

It should be noted that a power fluctuation range can also be set for the transmission power range. When the transmission power of the STA is within the transmission power range including the fluctuation power range, the AP uses an implicit channel detection strategy to perform channel detection on the communication channel. Wherein, the power fluctuation range can be represented by a power fluctuation threshold. For example, assuming that the power fluctuation threshold P _{th is used to} represent the power fluctuation range, the upper limit of the transmission power range P _liner , and the transmission power P _{tx of the} STA, when P _tx ≦P _liner + P _th , it is determined to adopt an implicit channel detection strategy for communication Channel detection.

Wherein, the AP can estimate the transmission power of the STA based on the path loss when the STA sends a signal to the AP and the signal receiving power required by the AP. For example, the AP may determine the sum of the path loss when the STA sends a signal to the AP and the signal reception power required by the AP as the transmission power of the STA. Wherein, the signal receiving power required by the AP is determined according to the hardware parameters of the AP (such as the signal-to-noise ratio of the AP's receiver, etc.). The way that the AP obtains the path loss when the STA sends a signal to the AP can be implemented as follows: the AP sends a beacon frame with a specified power to the STA, and receives the received power of the beacon frame fed back by the STA, and then specifies The difference between the power and the received power is determined as the path loss.

Step 2023: When the transmission power of the STA is outside the transmission power range, the AP adopts an explicit channel detection strategy to perform channel detection on the communication channel.

When the transmission power of the STA is outside the transmission power range, it means that the transmission power of the STA is difficult to meet the STA's radio frequency nonlinear performance required by the implicit channel detection strategy. At this time, the AP adopts the explicit channel detection strategy to perform the communication channel Channel detection.

In addition, a power fluctuation range can also be set for the transmission power range. When the transmission power of the STA is outside the transmission power range including the fluctuation power range, the AP uses an explicit channel detection strategy to perform channel detection on the communication channel. Wherein, the power fluctuation range can be represented by a power fluctuation threshold. For example, assuming the power fluctuation threshold P _th , the upper limit of the transmission power range P _liner , and the transmission power P _{tx of the} STA, it is determined when P _tx ≦P _liner + P _th The implicit channel detection strategy is adopted for channel detection of the communication channel.

It should be noted that when the reference factor also includes other factors, if the transmission power in step 2021 is determined based on the other factors, then in step 2022 and step 2023, the transmission power of the STA used when comparing with the transmission power range Is the transmit power of the STA when only one STA sends a test signal to the AP; if the transmit power in step 2021 is not determined based on the other factors, in step 2022 and step 2023, the STA used when comparing with the transmit power range The transmit power of is the transmit power of the STA under the influence of the other factors when the STA sends a test signal to the AP.

It should also be noted that when the transmission power of the STA is outside the transmission power range, the AP may also refer to other factors that affect the progress of channel detection, and select a detection strategy from the detection strategy set, which is not specifically limited in the embodiment of the application.

In summary, the embodiment of the present application provides a method for determining a channel sounding strategy. The radio frequency non-linear performance of the STA is obtained through the AP, and the radio frequency non-linear performance and the transmission power of the STA are determined according to the reference factors. The detection strategy used for channel detection of the communication channel between AP and STA. Compared with related technologies, AP can determine the channel detection strategy with reference to the STA's radio frequency non-linear performance and transmit power, which can avoid the STA's radio frequency non-linear performance. The poor influence on channel detection accuracy can effectively ensure the accuracy of channel detection, and correspondingly, it can effectively ensure the distributed multiple input multiple output performance when multiple APs work together. Moreover, since the AP can flexibly determine the channel detection strategy according to the STA's radio frequency non-linear performance, the channel detection accuracy and air interface overhead are optimized.

It should be noted that the sequence of steps in the method for determining the channel detection strategy provided in the embodiments of the present application can be adjusted appropriately, and the steps can also be increased or decreased accordingly according to the situation. Within the scope, the methods that can be easily conceived of changes should be covered by the scope of protection of this application, so I will not repeat them.

The following are device embodiments of this application, which can be used to implement the method embodiments of this application. For details that are not disclosed in the device embodiments of this application, please refer to the method embodiments of this application.

The embodiment of the present application provides an apparatus for determining a channel sounding strategy. As shown in FIG. 4, the apparatus 40 for determining a channel sounding strategy may include:

The obtaining module 401 is used to obtain the radio frequency non-linear performance of the station STA.

The determining module 402 is configured to determine a detection strategy used for channel detection of the communication channel between the AP and the STA based on reference factors. The reference factors include the radio frequency non-linear performance and the transmission power of the STA. Among them, the device for determining the channel sounding strategy can be deployed in the AP.

Optionally, the determining module 402 is specifically configured to: select a detection strategy in a detection strategy set based on reference factors, where the detection strategy set includes an implicit channel detection strategy and an explicit channel detection strategy, and the pair of implicit channel detection strategies The requirement of STA's radio frequency non-linear performance is higher than the requirement of explicit channel sounding strategy for STA's radio frequency non-linear performance.

Optionally, the determining module 402 is specifically configured to: based on reference factors, calculate the transmission power range of the STA allowed by the implicit channel sounding strategy, and the transmission power range has a non-zero upper limit. When the transmission power of the STA is within the transmission power range, the implicit channel detection strategy is adopted to perform channel detection on the communication channel.

Optionally, the determining module 402 is further specifically configured to: when the transmission power of the STA is outside the transmission power range, adopt an explicit channel detection strategy to perform channel detection on the communication channel.

Optionally, the reference factor also includes: the total number of all STAs that perform channel sounding with the AP simultaneously with the STA.

Optionally, the radio frequency nonlinear performance of the STA may be reflected by radio frequency nonlinear parameters. Among them, the radio frequency nonlinearity parameter is used to indicate the demarcation point between the radio frequency linear region and the radio frequency nonlinear region of the STA.

Optionally, the radio frequency non-linear parameters include one or more of the following: 1 decibel compression point, 3 decibel compression point, and third-order intermodulation intercept point of the radio frequency power amplifier of the STA.

Optionally, the radio frequency non-linear parameters include the 1 decibel compression point of the STA's radio frequency power amplifier. The upper limit of the transmission power range of the STA allowed by the implicit channel detection strategy is the sum of the 1 decibel compression point and the compensation value. The compensation value includes the AP The value of nonlinear compensation capability.

Optionally, the acquiring module 401 is specifically configured to extract radio frequency nonlinear parameters from an association request from the STA, and the radio frequency nonlinear parameters reflect the radio frequency nonlinear performance of the STA.

In summary, an embodiment of the present application provides a device for determining a channel sounding strategy. The radio frequency nonlinear performance of the STA is acquired through an acquisition module, and the determination module is based on reference factors including the radio frequency nonlinear performance and the transmission power of the STA. , To determine the detection strategy used for channel detection of the communication channel between AP and STA. Compared with related technologies, AP can determine the channel detection strategy with reference to the radio frequency non-linear performance and transmission power of the STA, which can avoid the radio frequency interference caused by the STA. The impact of poor linearity on the accuracy of channel detection can effectively ensure the accuracy of channel detection, and correspondingly, it can effectively ensure the distributed multiple-input multiple-output performance when multiple APs work together. Moreover, since the AP can flexibly determine the channel detection strategy according to the STA's radio frequency non-linear performance, the channel detection accuracy and air interface overhead are optimized.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the device and module described above can be referred to the corresponding process in the foregoing method embodiment, which will not be repeated here.

The embodiment of the present application also provides an AP device. As shown in FIG. 5, the AP 500 includes a processor 510, a memory 520, and a communication interface 530. The processor 510, the memory 520, and the communication interface 530 are connected to each other through a bus 540.

The bus 540 can be divided into an address bus, a data bus, a control bus, and so on. For ease of presentation, only one thick line is used to represent in FIG. 5, but it does not mean that there is only one bus or one type of bus.

The memory 520 may include a volatile memory (volatile memory), such as a random-access memory (RAM). The memory 520 may also include a non-volatile memory (non-volatile memory), such as a flash memory (flash memory), a hard disk drive (HDD), or a solid-state drive (SSD). The memory 520 may also include a combination of the above-mentioned types of memories.

The processor 510 may be a hardware chip, which is used to implement the method for determining a channel detection strategy provided in the embodiment of the present application. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof. Alternatively, the processor 510 may also be a general-purpose processor, for example, a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.

Correspondingly, the memory 520 is used to store program instructions, and the processor 510 can call the program instructions stored in the memory 520 to execute one or more steps in the method for determining a channel detection strategy provided in the embodiments of the present application, or alternatively, The implementation manner of the AP 500 enables the AP 500 to implement the method for determining the channel sounding strategy provided in the foregoing method embodiment. For example, the processor 510 calls the program instructions stored in the memory 520, and the AP 500 can perform the following steps: obtain the radio frequency nonlinear performance of the STA, and determine the communication between the AP and the STA based on the reference factors including the radio frequency nonlinear performance The detection strategy used by the channel for channel detection. In addition, the AP 500 executes the computer instructions in the memory 520, and the implementation process of executing this step may refer to the corresponding description in the foregoing method embodiment.

The communication interface 530 may be any one or any combination of the following devices: a network interface (such as an Ethernet interface), a wireless network card, and other devices with a network access function. The communication interface 530 is used for data communication between the AP device and other nodes or other computer devices.

The embodiment of the present application also provides a computer-readable storage medium. The computer-readable storage medium may be a non-transitory readable storage medium. When the instructions in the computer-readable storage medium are executed by the computer, the computer is used for Perform the method for determining the channel sounding strategy provided in this application. The computer-readable storage medium includes, but is not limited to, volatile memory, such as random access memory, non-volatile memory, such as flash memory, hard disk drive (HDD), and solid state drive (SSD).

This application also provides a computer program product. The computer program product includes computer instructions. When executed by a computing device, the computing device executes the method for determining a channel detection strategy provided in this application.

A person of ordinary skill in the art can understand that all or part of the steps in the above embodiments can be implemented by hardware, or by a program to instruct relevant hardware. The program can be stored in a computer-readable storage medium. The storage medium mentioned can be a read-only memory, a magnetic disk or an optical disk, etc.

The above are only optional embodiments of this application and are not intended to limit this application. Any modification, equivalent replacement, improvement, etc. made within the principles of this application shall be included in the scope of protection of this application. Inside.

Claims (20)

A method for determining a channel sounding strategy, characterized in that the method includes: The access point (AP) obtains the radio frequency non-linear performance of the station (STA); The AP determines a detection strategy used for channel detection of the communication channel between the AP and the STA based on reference factors, and the reference factors include: radio frequency non-linear performance and transmission power of the STA. The method according to claim 1, wherein the AP determining a detection strategy for channel detection of the communication channel between the AP and the STA based on a reference factor comprises: The AP selects the detection strategy in a detection strategy set based on the reference factor, wherein the detection strategy set includes an implicit channel detection strategy and an explicit channel detection strategy, and the implicit channel detection strategy is The requirement of the radio frequency non-linear performance of the STA is higher than the requirement of the explicit channel sounding strategy on the radio frequency non-linear performance of the STA. The method according to claim 1 or 2, wherein the AP selecting the detection strategy from a detection strategy set based on the reference factor comprises: The AP calculates the transmission power range of the STA allowed by the implicit channel sounding strategy based on the reference factor, and the transmission power range has a non-zero upper limit; When the transmission power of the STA is within the transmission power range, the AP adopts the implicit channel detection strategy to perform channel detection on the communication channel. The method according to claim 3, wherein the AP selects the detection strategy from a detection strategy set based on the reference factor, further comprising: When the transmission power of the STA is outside the transmission power range, the AP adopts an explicit channel detection strategy to perform channel detection on the communication channel. The method according to any one of claims 1 to 4, wherein the reference factor further comprises: the total number of all STAs that perform channel sounding with the AP at the same time as the STA. The method according to any one of claims 1 to 5, wherein the radio frequency nonlinear performance of the STA is reflected by radio frequency nonlinear parameters, and the radio frequency nonlinear parameters indicate the radio frequency linear region and radio frequency nonlinearity of the STA The demarcation point of the area. The method according to claim 6, wherein the radio frequency non-linear parameter comprises one or more of the following: a 1 decibel compression point, a 3 decibel compression point, and a third-order intermodulation intercept point of the radio frequency power amplifier of the STA. The method according to claim 3 or 4, wherein the radio frequency nonlinear performance of the STA is reflected by radio frequency nonlinear parameters, and the radio frequency nonlinear parameters include the 1 decibel compression point of the radio frequency power amplifier of the STA. The upper limit of the transmission power range is the sum of the 1 decibel compression point and the compensation value, and the compensation value includes the non-linear compensation capability value of the AP. The method according to any one of claims 1 to 8, wherein the access point (AP) acquiring the radio frequency non-linear performance of a station (STA) comprises: The AP extracts a radio frequency non-linear parameter from the association request from the STA, and the radio frequency non-linear parameter reflects the radio frequency non-linear performance of the STA. A device for determining a channel sounding strategy, characterized in that the device comprises: The acquisition module is used to acquire the radio frequency non-linear performance of the station (STA); The determining module is configured to determine a detection strategy used for channel detection of the communication channel between the AP and the STA based on reference factors, the reference factors including the radio frequency non-linear performance and the transmission power of the STA. The device according to claim 10, wherein the determining module is specifically configured to: Based on the reference factor, the detection strategy is selected from a detection strategy set, where the detection strategy set includes an implicit channel detection strategy and an explicit channel detection strategy, and the implicit channel detection strategy affects the radio frequency of the STA. The requirement of non-linear performance is higher than the requirement of the explicit channel sounding strategy on the non-linear performance of the radio frequency of the STA. The device according to claim 10 or 11, wherein the determining module is specifically configured to: Based on the reference factor, calculating the transmission power range of the STA allowed by the implicit channel sounding strategy, where the transmission power range has a non-zero upper limit; When the transmission power of the STA is within the transmission power range, the implicit channel detection strategy is adopted to perform channel detection on the communication channel. The device according to claim 12, wherein the determining module is specifically further configured to: When the transmission power of the STA is outside the transmission power range, an explicit channel detection strategy is adopted to perform channel detection on the communication channel. The apparatus according to any one of claims 10 to 13, wherein the reference factor further comprises: the total number of all STAs that perform channel sounding with the AP at the same time as the STA. The apparatus according to any one of claims 10 to 14, wherein the radio frequency non-linear performance of the STA is reflected by a radio frequency non-linear parameter, and the radio frequency non-linear parameter indicates the radio frequency linear region and the radio frequency non-linearity of the STA The demarcation point of the area. The apparatus according to claim 15, wherein the radio frequency non-linear parameter comprises one or more of the following: a 1 decibel compression point, a 3 decibel compression point, and a third-order intermodulation intercept point of the radio frequency power amplifier of the STA. The device according to claim 12 or 13, wherein the radio frequency non-linear performance of the STA is reflected by radio frequency non-linear parameters, and the radio frequency non-linear parameters include the 1 decibel compression point of the radio frequency power amplifier of the STA. The upper limit of the transmission power range is the sum of the 1 decibel compression point and the compensation value, and the compensation value includes the non-linear compensation capability value of the AP. The device according to any one of claims 10 to 17, wherein the acquisition module is specifically configured to: The radio frequency non-linear parameter is extracted from the association request from the STA, and the radio frequency non-linear parameter reflects the radio frequency non-linear performance of the STA. An access point (AP) device, comprising: a processor and a memory, and a computer program is stored in the memory; when the processor executes the computer program, the AP device implements any one of rights 1 to 9 The method for determining the channel detection strategy. A storage medium, characterized in that, when the instructions in the storage medium are executed by a processor, the method for determining a channel detection strategy according to any one of weights 1 to 9 is implemented.

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