Wireless transmitting power control method, system and device

Abstract

The invention provides a wireless transmitting power control method, system and device. The wireless transmission power control method comprises the following steps: estimating the received signal strength of each channel in a plurality of channels used in wireless communication connection; when the number or proportion of the channels with the received signal strength lower than a first signal strength threshold value is greater than a first threshold value, sending a power control request to require a communication opposite end in wireless communication connection to increase the transmitting power; or, when the number or proportion of the channels with the received signal strength lower than a second signal strength threshold value is lower than a second threshold value, the sending power control request requires the communication opposite end in the wireless communication connection to reduce the transmitting power, and the first signal strength threshold value is lower than the second signal strength threshold value. In this way, the adaptability to the frequency selective fading environment and the accuracy of power control can be improved.

Description

[0001] This invention is a divisional application of the Chinese invention patent application with the application date of December 11, 2020, patent application number: 202011459566.2, and invention name: "Wireless Transmit Power Control Method, System and Device". [Technical field]

[0002] The present invention relates to the field of wireless communications, and in particular to a method, system and device for controlling wireless transmission power. [Background technology]

[0003] The Internet of Things is the foundation of the intelligent era, and wireless connection technology is the core of the Internet of Things. With the development of the Internet of Things, various wireless connection technologies have been widely used, such as Bluetooth Low Energy (BLE). Especially in a large number of sensor and control application fields, people have also put forward higher and higher requirements on the power consumption and anti-interference performance of wireless connection technology. In order to reduce the RF power consumption of BLE devices and reduce the RF interference of BLE to the wireless environment, the new generation of BLE protocol has added a transmit power control protocol to control the RF transmit power. The usual transmit power control method adjusts the other party's transmit power based on the average received signal strength estimated by the receiver. When the average received signal strength is higher than a certain threshold, the transmitter at the opposite end is required to reduce the transmit power, and when the average received signal strength is lower than a certain threshold, the transmitter at the opposite end is required to increase the transmit power.

[0004] However, the average received signal strength cannot truly reflect the received signal strength of multiple signals, and the scheme for transmitting power control based on the average received signal strength still needs to be optimized. [Summary of the invention]

[0005] The object of the present invention is to provide a wireless transmission power control method, system and device, which can improve the adaptability to frequency selective fading environment and the accuracy of power control.

[0006] According to one aspect of the present invention, the present invention provides a wireless transmission power control method, which includes: estimating the received signal strength of each channel among multiple channels used in a wireless communication connection; when the number or proportion of channels with received signal strength lower than a first signal strength threshold is greater than a first threshold, sending a power control request to require the communication peer of the wireless communication connection to increase the transmission power.

[0007] According to one aspect of the present invention, the present invention provides a wireless transmission power control method, which includes: estimating the received signal strength of each channel among multiple channels used in a wireless communication connection; when the number or proportion of channels with received signal strength lower than a second signal strength threshold is lower than a second threshold, sending a power control request to request the communication peer of the wireless communication connection to reduce the transmission power, wherein the first signal strength threshold is lower than the second signal strength threshold.

[0008] According to another aspect of the present invention, the present invention provides a wireless transmission power control method, which includes: receiving a power control request; increasing or decreasing the transmission power according to the power control request.

[0009] According to another aspect of the present invention, the present invention provides a wireless transmission power control system, which includes: a first wireless communication terminal; a second wireless communication terminal that establishes a wireless communication connection with the first wireless communication terminal, one of the first wireless communication terminal and the second wireless communication terminal serves as a transmitting terminal of the wireless communication connection, and the other of the first wireless communication terminal and the second wireless communication terminal serves as a receiving terminal of the wireless communication connection. When wireless communication is performed using the wireless communication connection, the following operations are performed: estimating the received signal strength of each of the multiple channels used in the wireless communication connection; when the number or proportion of channels with received signal strengths lower than a first signal strength threshold is greater than a first threshold, sending a power control request to request the communication peer of the wireless communication connection to increase the transmission power.

[0010] According to another aspect of the present invention, the present invention provides a wireless transmission power control system, which includes: a first wireless communication terminal; a second wireless communication terminal that establishes a wireless communication connection with the first wireless communication terminal, one of the first wireless communication terminal and the second wireless communication terminal serves as a transmitting terminal of the wireless communication connection, and the other of the first wireless communication terminal and the second wireless communication terminal serves as a receiving terminal of the wireless communication connection. When wireless communication is performed using the wireless communication connection, the following operations are performed: estimating the received signal strength of each of the multiple channels used in the wireless communication connection; when the number or proportion of channels with received signal strengths lower than a second signal strength threshold is lower than a second threshold, sending a power control request to request the communication peer of the wireless communication connection to reduce the transmission power.

[0011] According to another aspect of the present invention, the present invention provides a wireless transmission power control device, which includes: a received signal strength estimation module, which is configured to estimate the received signal strength of each channel among multiple channels used in a wireless communication connection; a power control module, which is configured to send a power control request to request the communication partner of the wireless communication connection to increase the transmission power when the number or proportion of channels with received signal strength lower than a first signal strength threshold is greater than a first threshold.

[0012] Compared with the prior art, the present invention determines whether it is necessary to require the communication partner of the wireless communication connection to adjust its transmission power based on the number or proportion of channels whose received signal strength is lower than the first signal strength threshold and / or lower than the second signal strength threshold, rather than the average received signal strength of each channel, thereby improving the adaptability to the frequency selective fading environment and the accuracy of power control.

[0013] The present invention can achieve more specific beneficial effects which will be described in detail below in conjunction with specific embodiments.

Brief Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0015] Figure 1 The received signal strength distribution diagram of the first BLE frequency selective fading channel with low average received signal strength;

[0016] Figure 2 is a received signal strength distribution diagram of the second BLE frequency selective fading channel with a lower average received signal strength;

[0017] Figure 3 The received signal strength distribution diagram of a BLE frequency selective fading channel with a relatively high average received signal strength;

[0018] Figure 4 is a structural block diagram of a wireless transmission power control system in one embodiment of the present invention;

[0019] Figure 5 is a structural block diagram of a wireless transmission power control method in one embodiment of the present invention;

[0020] Figure 6 FIG. 4 is a structural block diagram of a wireless transmission power control device in one embodiment of the present invention. [Specific implementation method]

[0021] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0022] For BLE wireless connection technology using adaptive frequency hopping (AFH: Adaptive Frequency Hopping) in a frequency selective fading environment, the signal strength difference between channels is likely to exceed 20dB, so the power control method based solely on the average received signal strength is inaccurate.

[0023] The present invention discloses an improved wireless transmission power control method. The wireless transmission power control method determines whether it is necessary to require a communication peer of a wireless communication connection to adjust its transmission power based on the number or proportion of channels whose received signal strength is lower than a first signal strength threshold and / or lower than a second signal strength threshold, rather than the average received signal strength of each channel, thereby improving adaptability to frequency selective fading environments and the accuracy of power control.

[0024] Figure 5 FIG. 5 is a structural block diagram of a wireless transmission power control method 500 in one embodiment of the present invention. Figure 5 As shown, the wireless transmission power control method 500 includes the following steps.

[0025] Step 510, estimating the received signal strength RSSI of each of the plurality of channels used in the wireless communication connection.

[0026] like Figure 4 As shown, the wireless communication connection is established between the first wireless communication terminal 410 and the second wireless communication terminal 420. The wireless communication connection is established based on Bluetooth low energy (BLE) technology, and the BLE technology adopts adaptive frequency hopping (AFH) technology. The first wireless communication terminal 410 and the second wireless communication terminal 420 both support Bluetooth low energy technology and have wireless transceiver functions. When performing wireless communication, one of the first wireless communication terminal and the second wireless communication terminal serves as a transmitting terminal for the wireless communication connection, and the other of the first wireless communication terminal and the second wireless communication terminal serves as a receiving terminal for the wireless communication connection. And the first wireless communication terminal and the second wireless communication terminal can both serve as transmitting terminals for the wireless communication connection, and can also serve as receiving terminals for the wireless communication connection. The first wireless communication terminal 410 can be referred to as the communication counterpart of the second wireless communication terminal 420, and the second wireless communication terminal 420 can be referred to as the communication counterpart of the first wireless communication terminal 410.

[0027] In one embodiment, the received signal strength of each channel in the multiple channels in use is estimated by receiving a control packet, a data packet and / or a test packet during the communication process using the wireless communication connection. In another embodiment, the received signal strength of each channel in all the multiple channels or the unused channels is estimated by periodically receiving a test packet during the communication process using the wireless communication connection. If the received signal strength of each channel of the unused channel is greater than or equal to the first signal strength threshold, the unused channel can be set as a used channel.

[0028] Step 520: When the number or proportion of channels with received signal strength lower than a first signal strength threshold is greater than a first threshold, a power control request is sent to request the communication peer of the wireless communication connection to increase the transmission power; when the number or proportion of channels with received signal strength lower than a second signal strength threshold is lower than a second threshold, a power control request is sent to request the communication peer of the wireless communication connection to reduce the transmission power, wherein the first signal strength threshold is lower than the second signal strength threshold. The power control request may be a protocol command: LL_POWER_CONTROL_REQ.

[0029] It should be noted that when the number of channels whose received signal strength is lower than the first signal strength threshold is compared with the first threshold, the first threshold may be a quantity threshold, and when the proportion of channels whose received signal strength is lower than the first signal strength threshold is compared with the first threshold, the first threshold may be a proportion threshold. The proportion of channels whose received signal strength is lower than the first signal strength threshold or the second signal strength threshold refers to the ratio of the number of channels whose received signal strength is lower than the first signal strength threshold or the second signal strength threshold to the total number of channels used. Similarly, the second threshold is also a quantity threshold in one case and a proportion threshold in another case.

[0030] In one embodiment, after receiving a power control request for the communication peer of the wireless communication connection to increase the transmission power, the transmitting terminal of the wireless communication connection increases the transmission power with the first step length until the number or proportion of channels with received signal strengths lower than the first signal strength threshold is less than or equal to the first threshold. In some embodiments, the transmission power may only need to be increased once with the first step length to make the number or proportion of channels with received signal strengths lower than the first signal strength threshold less than or equal to the first threshold. In some embodiments, the transmission power may need to be increased twice or more with the first step length.

[0031] In one embodiment, after receiving a power control request for the communication peer of the wireless communication connection to reduce the transmission power, the transmitting terminal of the wireless communication connection reduces the transmission power with a second step length until the number or proportion of channels with received signal strengths lower than the second signal strength threshold is greater than or equal to the second threshold. In some embodiments, the transmission power may only need to be reduced once with the second step length to make the number or proportion of channels with received signal strengths lower than the second signal strength threshold greater than or equal to the second threshold. In some embodiments, the transmission power may need to be reduced twice or more with the second step length.

[0032] When determining whether the transmit power needs to be adjusted, the following two conditions may be considered: 1) the number or proportion of channels with received signal strength lower than a first signal strength threshold is greater than the first threshold, and, 2) the number or proportion of channels with received signal strength lower than a second signal strength threshold is lower than the second threshold.

[0033] In one embodiment, after the transmitting terminal connected by wireless communication increases the transmission power so that the number or proportion of channels with received signal strength lower than the first signal strength threshold is less than or equal to the first threshold, the channels with received signal strength lower than the first signal strength threshold can be set as non-used channels, so that the received signal strength of the used channels is greater than or equal to the first signal strength threshold, thereby ensuring good BLE reception performance. In one embodiment, after the transmitting terminal connected by wireless communication reduces the transmission power so that the number or proportion of channels with received signal strength lower than the second signal strength threshold is greater than or equal to the second threshold, the channels with received signal strength lower than the first signal strength threshold are set as non-used channels, thereby ensuring that the received signal strength of the used channels is greater than or equal to the first signal strength threshold, thereby ensuring good BLE reception performance. However, it should be noted that the channels with received signal strength lower than the first signal strength threshold are not unusable, but their received signal strength is low, and the probability of erroneous data packets is higher, but erroneous data packets do not necessarily occur; in other words, the channels with received signal strength lower than the first signal strength threshold may not be set as non-used channels. In addition, the number of used channels has a minimum threshold, and if it is less than or equal to the minimum threshold, the channels with received signal strength lower than the first signal strength threshold are no longer set as non-used channels.

[0034] Figure 1 This is a received signal strength distribution diagram of the first BLE frequency selective fading channel with a low average received signal strength. Figure 2 This is a received signal strength distribution diagram of the second BLE frequency selective fading channel with a lower average received signal strength.

[0035] like Figure 1 and 2As shown in the figure, the RSSI mean (average received signal strength) of the 40 BLE channels is equal to -75dBm, but Figure 1 and Figure 2 The number of channels with a power level lower than -75dBm is 27 and 20 respectively, and the number of channels with a power level lower than -80dBm is 7 and 4 respectively. If the average RSSI is used as the threshold for power control, for example, if the average RSSI is lower than -74dBm, the other party (i.e., the transmitting terminal) is required to increase the transmission power. Figure 1 and Figure 2 Both satisfy this condition and both require the other party to increase the transmission power, but the results are different. This is because the number of deep fading channels in the two cases is different.

[0036] According to the used channels information provided by AFH, when the number or proportion of channels with received signal strength lower than the first signal strength threshold is greater than the first threshold, a power control request is sent to request the transmitting terminal of the wireless communication connection to increase the transmission power. For example, Figure 1 The number of channels used is 40, the first signal strength threshold is -80dBm, and the first threshold is set to 5, then, Figure 1 The number of channels whose received signal strength is lower than the first signal strength threshold -80dBm is 7, which is greater than the first threshold 5, requiring the transmitting terminal to increase the transmission power. Figure 2 The number of channels in which the received signal strength is lower than the first signal strength threshold -80dBm is 4, which is less than the first threshold 5, and there is no need to require the transmitting terminal to increase the transmission power. Figure 2 In such a case, the wireless transmission power control method disclosed in the present invention can further save the transmission power of the transmitting terminal.

[0037] According to the used channels information provided by the AFH, when the number or proportion of channels with received signal strength lower than the second signal strength threshold is lower than the second threshold, a power control request is sent to request the transmitting terminal of the wireless communication connection to reduce the transmission power. Figure 3 As shown, the second signal strength threshold is set to -75dBm and the second threshold is set to 5. Figure 3 The number of channels below the second signal strength threshold -75dBm is 4, which is less than the second threshold 5. The condition is met to require the other party to reduce the transmission power, and the transmitting terminal of the wireless communication connection is required to reduce the transmission power. The step size of the transmitting terminal to reduce the transmission power is, for example, 3dB.

[0038] It should be noted that when performing transmit power control of the transmitting terminal, the following two conditions can be considered: whether the number or proportion of channels whose received signal strength is lower than the first signal strength threshold is the first threshold, and whether the number or proportion of channels whose received signal strength is lower than the second signal strength threshold is the second threshold.

[0039] In a preferred embodiment, the second signal strength threshold is greater than the sum of the first signal strength threshold and the step length for reducing the transmission power of the communication peer.

[0040] According to one aspect of the present invention, the present invention proposes a wireless transmission power control method, which includes: receiving a power control request from a communication peer; increasing or decreasing the transmission power according to the power control request. The transmission power is increased with a first step length, and the transmission power is decreased with a second step length, and the first step lengths may be the same or different. The wireless transmission power control method also includes: sending a receiving control packet, a data packet and / or a test packet for estimating the received signal strength of each of a plurality of channels in use during communication using a wireless communication connection, or, during communication using a wireless communication connection, periodically sending a test packet for estimating the received signal strength of each of all a plurality of channels or non-used channels.

[0041] Figure 4 1 is a structural block diagram of a wireless transmission power control system in an embodiment of the present invention. The wireless transmission power control system includes a first wireless communication terminal 410 and a second wireless communication terminal 420. A wireless communication connection is established between the first wireless communication terminal 410 and the second wireless communication terminal 420. When wireless communication is performed using the wireless communication connection, the wireless transmission power control system can execute the wireless transmission power control method to perform power control. For the wireless transmission power control method, please refer to the above, which will not be repeated here.

[0042] According to another aspect of the present invention, the present invention is implemented as a wireless transmission power control device. Figure 6 As shown, the wireless transmission power control device includes a received signal strength estimation module 610 and a power control module 620 .

[0043] The received signal strength estimation module 610 is configured to estimate the received signal strength of each of the multiple channels used in the wireless communication connection. The power control module 620 is configured to send a power control request to request the transmitting terminal of the wireless communication connection to increase the transmission power when the number or proportion of channels with received signal strength lower than a first signal strength threshold is greater than a first threshold, and to send a power control request to request the transmitting terminal of the wireless communication connection to reduce the transmission power when the number or proportion of channels with received signal strength lower than a second signal strength threshold is lower than a second threshold, wherein the first signal strength threshold is lower than the second signal strength threshold.

[0044] The power control module 620 is also configured to: after the transmitting terminal connected by the wireless communication increases the transmission power and the number or proportion of channels with received signal strength lower than the first signal strength threshold is less than or equal to the first threshold, set the channels with received signal strength lower than the first signal strength threshold as non-used channels; after the transmitting terminal connected by the wireless communication reduces the transmission power and the number or proportion of channels with received signal strength lower than the second signal strength threshold is greater than or equal to the second threshold, set the channels with received signal strength lower than the first signal strength threshold as non-used channels.

[0045] For other contents of the wireless transmission power control device, reference may be made to the relevant parts of the wireless transmission power control method mentioned above, which will not be repeated here.

[0046] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0047] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0048] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0049] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0050] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

Claims

1. A wireless transmission power control method, characterized in that: It includes: estimating received signal strength for each of a plurality of channels used in a wireless communication connection; When the number or proportion of channels whose received signal strength is lower than the first signal strength threshold is greater than the first threshold, a power control request is sent to request the communication peer of the wireless communication connection to increase the transmission power.

2. The wireless transmission power control method according to claim 1, wherein: The sending power control request requires the communication peer of the wireless communication connection to increase the transmission power until the number or proportion of channels with received signal strengths below the first signal strength threshold is less than or equal to the first threshold.

3. The wireless transmission power control method according to claim 1, wherein: The wireless communication connection is established based on Bluetooth low energy technology, which uses adaptive frequency hopping technology. Both wireless communication terminals of the wireless communication connection support Bluetooth low energy technology. Or / and, the wireless transmission power control method further includes: When the number or proportion of channels with received signal strength lower than the second signal strength threshold is lower than the second threshold, a power control request is sent to request the communication peer of the wireless communication connection to reduce the transmission power, wherein the first signal strength threshold is lower than the second signal strength threshold, The sending power control request requests the communication peer of the wireless communication connection to reduce the transmission power until the number or proportion of channels with received signal strength lower than the second signal strength threshold is greater than or equal to the second threshold, After the number or proportion of channels with received signal strength lower than the second signal strength threshold is greater than or equal to the second threshold, the channels with received signal strength lower than the first signal strength threshold are set as unused channels.

4. The wireless transmission power control method according to claim 1, wherein: It also includes: After the number or proportion of channels with received signal strength lower than the first signal strength threshold is less than or equal to the first threshold, the channels with received signal strength lower than the first signal strength threshold are set as unused channels.

5. The wireless transmission power control method according to claim 1, wherein: During the wireless communication connection, the received signal strength of each of the multiple channels used is estimated by receiving the control packet, the data packet and / or the test packet. Alternatively, during the wireless communication connection, the received signal strength of each channel in all multiple channels or unused channels is estimated by periodically receiving test packets. If the received signal strength of each channel of the unused channel is greater than or equal to the first signal strength threshold, the unused channel is set as a used channel.

6. A wireless transmission power control method, characterized in that: It includes: estimating received signal strength for each of a plurality of channels used in a wireless communication connection; When the number or proportion of channels whose received signal strength is lower than the second signal strength threshold is lower than the second threshold, a power control request is sent to request the communication peer of the wireless communication connection to reduce the transmission power.

7. The wireless transmission power control method according to claim 6, wherein: The sending power control request requires the communication peer of the wireless communication connection to reduce the transmission power until the number or proportion of channels with received signal strength lower than the second signal strength threshold is greater than or equal to the second threshold.

8. The wireless transmission power control method according to claim 6, wherein: The wireless communication connection is established based on Bluetooth low energy technology, which uses adaptive frequency hopping technology. Both wireless communication terminals of the wireless communication connection support Bluetooth low energy technology. Or / and, the wireless transmission power control method includes: When the number or proportion of channels with received signal strength lower than a first signal strength threshold is greater than a first threshold, a power control request is sent to request the communication peer of the wireless communication connection to increase the transmission power, wherein the first signal strength threshold is lower than the second signal strength threshold, The sending power control request requires the communication peer of the wireless communication connection to increase the transmission power until the number or proportion of channels with received signal strengths below the first signal strength threshold is less than or equal to the first threshold.

9. A wireless transmission power control system, characterized in that: It includes: a first wireless communication terminal; A second wireless communication terminal that establishes a wireless communication connection with the first wireless communication terminal, wherein one of the first wireless communication terminal and the second wireless communication terminal serves as a transmitting terminal of the wireless communication connection, and the other of the first wireless communication terminal and the second wireless communication terminal serves as a receiving terminal of the wireless communication connection; When wireless communication is performed using the wireless communication connection, the following operations are performed: estimating received signal strength for each of a plurality of channels used in a wireless communication connection; When the number or proportion of channels whose received signal strength is lower than the first signal strength threshold is greater than the first threshold, a power control request is sent to request the communication peer of the wireless communication connection to increase the transmission power.

10. The wireless transmission power control system according to claim 9, characterized in that: The communication peer of the wireless communication connection increases the transmission power at the first step until the number or proportion of channels with received signal strengths lower than the first signal strength threshold is less than or equal to the first threshold.

11. The wireless transmission power control system according to claim 9, characterized in that: The wireless communication connection is established based on Bluetooth low energy technology, the Bluetooth low energy technology adopts adaptive frequency hopping technology, and the first wireless communication terminal or the second wireless communication terminal supports Bluetooth low energy technology. When wireless communication is performed using the wireless communication connection, the following operations are also performed: When the number or proportion of channels with received signal strength lower than the second signal strength threshold is lower than the second threshold, a power control request is sent to request the communication peer of the wireless communication connection to reduce the transmission power, wherein the first signal strength threshold is lower than the second signal strength threshold, The sending power control request requests the communication peer of the wireless communication connection to reduce the transmission power until the number or proportion of channels with received signal strength lower than the second signal strength threshold is greater than or equal to the second threshold, After the number or proportion of channels with received signal strength lower than the second signal strength threshold is greater than or equal to the second threshold, the channels with received signal strength lower than the first signal strength threshold are set as unused channels.

12. The wireless transmission power control system according to claim 9, characterized in that: During the communication process using the wireless communication connection, the received signal strength of each channel in the multiple channels used is estimated by receiving the control packet, the data packet and / or the test packet. Alternatively, during the communication process using the wireless communication connection, the received signal strength of each channel in all multiple channels or unused channels is estimated by periodically receiving test packets. If the received signal strength of each channel of the unused channel is greater than or equal to the first signal strength threshold, the unused channel is set as a used channel.

13. A wireless transmission power control system, characterized in that: It includes: a first wireless communication terminal; A second wireless communication terminal that establishes a wireless communication connection with the first wireless communication terminal, wherein one of the first wireless communication terminal and the second wireless communication terminal serves as a transmitting terminal of the wireless communication connection, and the other of the first wireless communication terminal and the second wireless communication terminal serves as a receiving terminal of the wireless communication connection; When wireless communication is performed using the wireless communication connection, the following operations are performed: estimating received signal strength for each of a plurality of channels used in a wireless communication connection; When the number or proportion of channels whose received signal strength is lower than the second signal strength threshold is lower than the second threshold, a power control request is sent to request the communication peer of the wireless communication connection to reduce the transmission power.

14. The wireless transmission power control system according to claim 13, characterized in that: The sending power control request requests the communication peer of the wireless communication connection to reduce the transmission power until the number or proportion of channels with received signal strength lower than the second signal strength threshold is greater than or equal to the second threshold, The wireless communication connection is established based on Bluetooth low energy technology, which uses adaptive frequency hopping technology. Both wireless communication terminals of the wireless communication connection support Bluetooth low energy technology. When wireless communication is performed using the wireless communication connection, the following operations are also performed: When the number or proportion of channels with received signal strength lower than a first signal strength threshold is greater than a first threshold, a power control request is sent to request the communication peer of the wireless communication connection to increase the transmission power, wherein the first signal strength threshold is lower than the second signal strength threshold, The sending power control request requires the communication peer of the wireless communication connection to increase the transmission power until the number or proportion of channels with received signal strengths below the first signal strength threshold is less than or equal to the first threshold.

15. A wireless transmission power control device, characterized in that: It includes: a received signal strength estimation module configured to: estimate received signal strength of each of a plurality of channels used in a wireless communication connection; A power control module is configured to send a power control request to request a communication peer of a wireless communication connection to increase transmission power when the number or proportion of channels with received signal strengths below a first signal strength threshold is greater than a first threshold.

16. The wireless transmission power control device according to claim 15, characterized in that: The wireless communication connection is established based on Bluetooth low energy technology, the Bluetooth low energy technology adopts adaptive frequency hopping technology, and the wireless transmission power control device supports Bluetooth low energy technology. The power control module is configured to: send a power control request to request the communication peer of the wireless communication connection to reduce the transmission power when the number or proportion of channels with received signal strength lower than the second signal strength threshold is lower than the second threshold, wherein the first signal strength threshold is lower than the second signal strength threshold, The sending power control request requests the communication peer of the wireless communication connection to reduce the transmission power until the number or proportion of channels with received signal strength lower than the second signal strength threshold is greater than or equal to the second threshold, After the number or proportion of channels with received signal strength lower than the second signal strength threshold is greater than or equal to the second threshold, the channels with received signal strength lower than the first signal strength threshold are set as unused channels.

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