System and method for dynamically adjusting radio frequency power for low power devices

Abstract

The application discloses a system and method for dynamically adjusting radio frequency power of low-power-consumption equipment. The application relates to the technical field of communication and solves the problem of how to reduce radio frequency power consumption of wireless mobile equipment on the basis of ensuring signal transmission reliability of the wireless mobile equipment. The system for dynamically adjusting radio frequency power of low-power-consumption equipment comprises an equipment management system, a gateway, a wireless access point and a wireless module; the wireless module is in communication connection with the wireless access point, the wireless access point is in communication connection with the gateway, and the gateway is in communication connection with the equipment management system; the application adjusts the transmission power of the wireless module according to the packet loss rate and the average signal strength of the wireless module in a current power consumption evaluation adjustment period, prolongs the standby time of the low-power-consumption wireless equipment, and reduces the radio frequency power consumption. The application improves the configuration flexibility and adaptability of wireless products, and can dynamically adjust the radio frequency power according to different implementation environments.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a system and method for dynamically adjusting radio frequency power of a low-power device. Background Art

[0002] Currently, industrial wireless communication equipment typically uses fixed RF power consumption for wireless device modules based on the product's usage scenario to ensure wireless communication reliability. However, in different scenarios, excessive RF power levels at different device locations can result in excessive power consumption and even signal leakage. For wireless mobile devices with high operating time requirements, low-power sleep mechanisms are often used to minimize standby power consumption, with the primary power loss occurring in the wireless RF module. Industrial wireless networks typically require high RF signal reliability, so reducing RF power consumption in mobile devices while ensuring reliable signal transmission is a pressing issue. Summary of the Invention

[0003] The object of the present invention is to provide a system and method for dynamically adjusting radio frequency power of a low-power device, which can reduce the radio frequency power consumption of a wireless mobile device while ensuring the reliability of signal transmission of the wireless mobile device.

[0004] In a first aspect, the present invention provides a system for dynamically adjusting radio frequency power of a low-power device, comprising: a device management system, a gateway, a wireless access point, and a wireless module; the wireless module is communicatively connected to the wireless access point, the wireless access point is communicatively connected to the gateway, and the gateway is communicatively connected to the device management system;

[0005] The wireless module is used to transmit wireless data to a wireless access point;

[0006] The wireless access point is configured to extract a signal strength value and a corresponding wireless module device number after receiving the wireless data, and forward the signal strength value and the corresponding wireless module device number related information to a device management system via a gateway;

[0007] The device management system is configured to start timing after receiving the information, and when a power consumption assessment adjustment period is reached, send an instruction to the wireless access point to query the data transmission and reception status of the wireless module within the current power consumption assessment adjustment period, so that the wireless access point sends a query to the wireless module when responding to data next time, so as to obtain the total number of data packets sent and the number of data packets successfully received by the wireless module within the current power consumption assessment adjustment period; the device management system calculates the packet loss rate of the wireless module within the current power consumption assessment adjustment period based on the total number of data packets sent and the number of data packets successfully received; calculates the average signal strength of the wireless module within the current power consumption assessment adjustment period based on the signal strength value; and adjusts the transmit power of the wireless module based on the packet loss rate and the average signal strength.

[0008] Furthermore, the packet loss rate is calculated according to the following formula:

[0009] Packet loss rate = (total number of packets sent - number of packets successfully received) / total number of packets sent.

[0010] Furthermore, the device management system is used to adjust the transmission power of the wireless module according to the following method:

[0011] Determining whether the signal strength mean is less than a first signal strength threshold;

[0012] If the mean signal strength is less than the first signal strength threshold, issue a control instruction to increase the transmit power of the wireless module by one step; if the mean signal strength is greater than or equal to the first signal strength threshold, determine whether the mean signal strength is less than or equal to a second signal strength threshold, and the second signal strength threshold is greater than the first signal strength threshold;

[0013] If the signal strength mean is less than or equal to a second signal strength threshold, determining whether the packet loss rate is greater than a packet loss rate threshold; if the packet loss rate is greater than the packet loss rate threshold, issuing a control instruction to increase the transmit power of the wireless module by one step; if the packet loss rate is less than or equal to the packet loss rate threshold, maintaining the transmit power of the wireless module unchanged;

[0014] If the signal strength mean is greater than the second signal strength threshold, determine whether the packet loss rate is less than or equal to the packet loss rate threshold; if the packet loss rate is less than or equal to the packet loss rate threshold, issue a control instruction to adjust the wireless module transmission power to reduce one step; if the packet loss rate is greater than the packet loss rate threshold, keep the wireless module transmission power unchanged.

[0015] Furthermore, when the wireless module transmit power is adjusted to increase by one step, the adjusted wireless module transmit power is less than or equal to the maximum transmit power of the wireless module.

[0016] Furthermore, when the wireless module transmit power is adjusted to decrease by one step, the adjusted wireless module transmit power is greater than or equal to the minimum transmit power of the wireless module.

[0017] Furthermore, the device management system is further configured to record the abnormality and send an interference alarm after the packet loss rate is greater than a packet loss rate threshold and the transmission power of the wireless module is kept unchanged.

[0018] Furthermore, the wireless module includes: a low-power module, a data acquisition and wake-up module, a main controller and a wireless radio frequency module, the low-power module and the data acquisition and wake-up module are respectively connected to the main controller by signal, and the main controller is connected to the wireless radio frequency module by signal;

[0019] The main controller is used to calculate the packet loss rate of the wireless module by counting and collecting serial port packets and wireless transmission response packets;

[0020] The device management system is further configured to send a wireless module packet loss rate query instruction to the wireless access point, so that the wireless access point sends a query to the wireless module when responding to data next time to obtain the packet loss rate of the wireless module in the current power consumption assessment adjustment period.

[0021] In a second aspect, the present invention provides a method for dynamically adjusting radio frequency power of a low-power device, which is applied to the system for dynamically adjusting radio frequency power of the low-power device described above, comprising:

[0022] Obtain the total number of sent data packets, the number of successfully received data packets, and the signal strength value of the wireless module during the current power consumption assessment adjustment period;

[0023] Calculating the packet loss rate of the wireless module during the current power consumption evaluation adjustment period based on the total number of sent data packets and the number of successfully received data packets; and calculating the average signal strength of the wireless module during the current power consumption evaluation adjustment period based on the signal strength value;

[0024] Determining whether the signal strength mean is less than a first signal strength threshold;

[0025] If the mean signal strength is less than the first signal strength threshold, issue a control instruction to increase the transmit power of the wireless module by one step; if the mean signal strength is greater than or equal to the first signal strength threshold, determine whether the mean signal strength is less than or equal to a second signal strength threshold, and the second signal strength threshold is greater than the first signal strength threshold;

[0026] If the signal strength average is less than or equal to the second signal strength threshold, it is judged whether the packet loss rate is greater than the packet loss rate threshold; if the packet loss rate is greater than the packet loss rate threshold, a control instruction is issued to adjust the wireless module transmission power to increase by one step; if the packet loss rate is less than or equal to the packet loss rate threshold, the wireless module transmission power is kept unchanged;

[0027] If the signal strength average is greater than the second signal strength threshold, it is judged whether the packet loss rate is less than or equal to the packet loss rate threshold; if the packet loss rate is less than or equal to the packet loss rate threshold, a control instruction is issued to adjust the wireless module transmission power to decrease by one step; if the packet loss rate is greater than the packet loss rate threshold, the wireless module transmission power is kept unchanged.

[0028] The low-power device dynamic radio frequency power adjustment system and method has the following beneficial effects: the low-power device dynamic radio frequency power adjustment system and method can adjust the packet loss rate and the signal strength average of the wireless module in the current power consumption evaluation adjustment period, adjust the wireless module transmission power, prolong the standby time of the low-power wireless device, and reduce the radio frequency power consumption. The wireless product configuration flexibility and adaptability are improved, and the radio frequency power can be dynamically adjusted according to different implementation environments. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0030] Figure 1 The system structure block diagram for dynamically adjusting the radio frequency power of the low-power device is shown in the figure.

[0031] Figure 2 The basic component block diagram of the wireless module is shown in the figure.

[0032] Figure 3 The wireless module transmission power adjustment flow chart is shown in the figure. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below in combination with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. The technical solutions provided by the embodiments of the present application will be described in detail below in combination with the drawings.

[0034] Please refer to Figure 1The embodiment of the present application provides a system for dynamically adjusting radio frequency power of a low-power-consumption device, comprising a device management system, a gateway, a wireless access point and a wireless module; the wireless module is in communication connection with the wireless access point, the wireless access point is in communication connection with the gateway, and the gateway is in communication connection with the device management system.

[0035] The wireless module transmits wireless data to the wireless access point; the wireless access point extracts a signal strength value and a corresponding wireless module device number after receiving the wireless data, and forwards the signal strength value and the corresponding wireless module device number to the device management system through the gateway; the device management system starts timing after receiving the information, and issues an instruction to the wireless access point to query the data transmission and reception of the wireless module in a current power consumption evaluation adjustment period when a power consumption evaluation adjustment period is reached, so that the wireless access point sends an inquiry to the wireless module when answering data next time to obtain the total number of data packets transmitted and the number of successfully received data packets of the wireless module in the current power consumption evaluation adjustment period; the device management system calculates the packet error ratio (PER) of the wireless module in the current power consumption evaluation adjustment period according to the total number of data packets transmitted and the number of successfully received data packets; the device management system calculates the average signal strength of the wireless module in the current power consumption evaluation adjustment period according to the received signal strength indication (RSSI) value; and the device management system adjusts the transmission power of the wireless module according to the packet error ratio and the average signal strength.

[0036] Please refer to Figure 2 The wireless module has a low-power-consumption sleep function and a radio frequency transceiving function, and specifically comprises a low-power-consumption module, a data acquisition wake-up module, a main controller and a wireless radio frequency module, the low-power-consumption module and the data acquisition wake-up module are respectively in signal connection with the main controller, and the main controller is in signal connection with the wireless radio frequency module; the main controller can count and acquire serial port packets and wirelessly transmit and answer packets to calculate the packet error ratio of the wireless module; and the device management system can be used to issue an instruction to the wireless access point to query the packet error ratio of the wireless module, so that the wireless access point sends an inquiry to the wireless module when answering data next time to obtain the packet error ratio of the wireless module in the current power consumption evaluation adjustment period.

[0037] Hereinafter, TIME_C represents the power consumption evaluation adjustment period, RSSI represents the average signal strength, RSSI_LOW represents the first signal strength threshold, RSSI_HIGH represents the second signal strength threshold, PER represents the packet error ratio, and PER_MIN represents the packet error ratio threshold.

[0038] The device management system maintains the signal strength value of each wireless module. Due to the device's low power requirements, a minimum power adjustment interval is set for each wireless module. When the device is awake and in use, every TIME_C period (for example, one hour) is used as an evaluation and adjustment period. Based on the total number of sent and received packets reported by the wireless module during this period, the actual packet loss rate (PER) of the wireless module is calculated: PER = (total number of packets sent - number of packets successfully received) / total number of packets sent. A packet loss rate threshold is set: PER_MIN, for example, 0.5%. When the PER exceeds this value, transmission reliability is considered insufficient. The average signal strength RSSI (Reliable Signal Indicator) of the wireless module is calculated every TIME_C period. The signal strength value is based on two thresholds: RSSI_LOW, for example, -72dBm, indicating that the signal strength has reached the critical value. When the RSSI is below this value, the signal is considered weak. RSSI_HIGH, for example, -52dBm, indicates that the signal strength is good. When the RSSI is above this value, the signal is considered strong. Adjust the wireless module power according to the calculation results and define the step size of power increase or decrease, for example: increase or decrease 3dBm each time. Figure 3 ,According to the comparison between the signal strength and packet loss rate and the established threshold, based on the decision model, the RF power of the wireless module is controlled and adjusted to ensure that the device can meet reliable transmission at low power consumption.

[0039] Specifically, the device management system adjusts the wireless module transmission power according to the following method:

[0040] Determining whether the signal strength mean is less than a first signal strength threshold;

[0041] If the average signal strength is less than the first signal strength threshold, issue a control instruction to increase the transmit power of the wireless module by one step; if the average signal strength is greater than or equal to the first signal strength threshold, determine whether the average signal strength is less than or equal to the second signal strength threshold, and the second signal strength threshold is greater than the first signal strength threshold;

[0042] If the signal strength mean is less than or equal to the second signal strength threshold, determine whether the packet loss rate is greater than the packet loss rate threshold; if the packet loss rate is greater than the packet loss rate threshold, issue a control instruction to adjust the wireless module transmit power by one step, so that the adjusted wireless module transmit power is less than or equal to the maximum transmit power of the wireless module; if the packet loss rate is less than or equal to the packet loss rate threshold, keep the wireless module transmit power unchanged;

[0043] If the signal strength mean is greater than the second signal strength threshold, determine whether the packet loss rate is less than or equal to the packet loss rate threshold; if the packet loss rate is less than or equal to the packet loss rate threshold, issue a control instruction to adjust the wireless module transmission power to reduce one step, and the adjusted wireless module transmission power is greater than or equal to the minimum transmission power of the wireless module; if the packet loss rate is greater than the packet loss rate threshold, keep the wireless module transmission power unchanged, record the abnormality and send an interference alarm.

[0044] For example, when a wireless module receives a signal from a terminal measuring device, it converts it into wireless data and transmits it to the wireless access point, increasing the total number of sent packets. Upon receiving a response signal from the wireless access point, the total number of sent packets is increased, and this number is recorded in real time based on usage.

[0045] After receiving the wireless data, the wireless access point extracts the wireless signal strength and the corresponding wireless module device number and uploads it to the device management system for recording. The device management system begins counting after receiving this information. When the power consumption assessment adjustment period, TIME_C, is reached, it issues a command to query the wireless module's transceiver status. For example, TIME_C is set to 1 hour, but this time can be adjusted to suit the specific terminal's operating hours.

[0046] After receiving this query, the wireless module uploads the specific number of sent and received packets to the device management system and resets the packet count. The device management system calculates the device's packet loss rate based on the specific packet count. For example, if 2000 packets are sent and 2000 are replied, the packet loss rate is calculated to be 0%. The average signal strength is calculated, for example, -55dBm. Based on the packet loss rate and average signal strength, judgments and power adjustments are made as follows:

[0047] If the signal is weak and the packet loss rate is high, RSSI <RSSI_LOW,则将当前发射功率增加一个步长,不超过最大允许功率。

[0048] If the signal is medium and the packet loss rate is high, that is, RSSI ≤ RSSI_HIGH and PER>PER_MIN, the current transmit power is increased by one step, not exceeding the maximum allowed power.

[0049] If the signal strength and packet loss rate are medium, that is, RSSI ≤ RSSI_HIGH and PER>PER_MIN, the current transmit power is maintained.

[0050] If the signal is strong and the packet loss rate is low, that is, RSSI>RSSI_HIGH and PER≤PER_MIN, the current transmit power is reduced by one step size, not less than the minimum guaranteed power to ensure basic coverage.

[0051] If the signal is strong but the packet loss rate is high, that is, RSSI>RSSI_HIGH but PER>PER_MIN, the current power is maintained and this abnormal state is recorded for analysis by upper-layer applications. An error report is triggered to the monitoring system.

[0052] Among them, the packet loss rate calculation method can be statistically analyzed within the device management system or recorded by the wireless module itself; the signal strength mean calculation method can also use weighted calculation and other methods, giving priority to the signal strength calculation of the adjacent time; the power consumption assessment adjustment cycle can use a fixed time period, or use a fixed number of received packets reaching a certain value as an adjustment cycle, which can be determined specifically based on the usage of the device terminal.

[0053] An embodiment of the present invention further provides a method for dynamically adjusting radio frequency power of a low-power device, which is applied to the system for dynamically adjusting radio frequency power of the low-power device described above, comprising:

[0054] Obtain the total number of sent data packets, the number of successfully received data packets, and the signal strength value of the wireless module during the current power consumption assessment adjustment period;

[0055] Calculate the packet loss rate of the wireless module during the current power consumption assessment adjustment period based on the total number of sent data packets and successfully received data packets; and calculate the average signal strength of the wireless module during the current power consumption assessment adjustment period based on the signal strength value.

[0056] Determining whether the signal strength mean is less than a first signal strength threshold;

[0057] If the average signal strength is less than the first signal strength threshold, issue a control instruction to increase the transmit power of the wireless module by one step; if the average signal strength is greater than or equal to the first signal strength threshold, determine whether the average signal strength is less than or equal to the second signal strength threshold, and the second signal strength threshold is greater than the first signal strength threshold;

[0058] If the mean signal strength value is less than or equal to the second signal strength threshold, determining whether the packet loss rate is greater than the packet loss rate threshold; if the packet loss rate is greater than the packet loss rate threshold, issuing a control instruction to increase the transmit power of the wireless module by one step; if the packet loss rate is less than or equal to the packet loss rate threshold, maintaining the transmit power of the wireless module unchanged;

[0059] If the mean signal strength is greater than the second signal strength threshold, determine whether the packet loss rate is less than or equal to the packet loss rate threshold; if the packet loss rate is less than or equal to the packet loss rate threshold, issue a control instruction to adjust the wireless module transmission power to reduce one step; if the packet loss rate is greater than the packet loss rate threshold, keep the wireless module transmission power unchanged.

[0060] As can be seen from the above embodiments, the present invention provides a system and method for dynamically adjusting RF power for low-power devices. By adjusting the wireless module's packet loss rate and the average signal strength within the current power consumption evaluation adjustment period, the system adjusts the wireless module's transmit power, thereby increasing the standby time of low-power wireless devices and reducing RF power consumption. This improves the flexibility and adaptability of wireless product configurations and allows for dynamic adjustment of RF power based on different implementation environments.

[0061] The above-described embodiments of the present invention do not limit the protection scope of the present invention.

Claims

1. A system for dynamically adjusting radio frequency power of a low-power device, characterized in that: include: Device management systems, gateways, wireless access points, and wireless modules; The wireless module is in communication connection with the wireless access point, the wireless access point is in communication connection with the gateway, and the gateway is in communication connection with the device management system; The wireless module is used to transmit wireless data to a wireless access point; The wireless access point is configured to extract a signal strength value and a corresponding wireless module device number after receiving the wireless data, and forward the signal strength value and the corresponding wireless module device number related information to a device management system via a gateway; The device management system is configured to start timing after receiving the information, and when a power consumption assessment adjustment period is reached, send an instruction to the wireless access point to query the data transmission and reception status of the wireless module during the current power consumption assessment adjustment period, so that the wireless access point sends a query to the wireless module when responding to data next time, so as to obtain the total number of data packets sent and the number of data packets successfully received by the wireless module during the current power consumption assessment adjustment period; the device management system calculates the packet loss rate of the wireless module during the current power consumption assessment adjustment period based on the total number of data packets sent and the number of data packets successfully received; Calculating the average signal strength of the wireless module within the current power consumption evaluation adjustment period according to the signal strength value; adjusting the transmit power of the wireless module according to the packet loss rate and the average signal strength; The device management system is used to adjust the transmission power of the wireless module according to the following method: Determining whether the signal strength mean is less than a first signal strength threshold; If the mean signal strength is less than the first signal strength threshold, issue a control instruction to increase the transmit power of the wireless module by one step; if the mean signal strength is greater than or equal to the first signal strength threshold, determine whether the mean signal strength is less than or equal to a second signal strength threshold, and the second signal strength threshold is greater than the first signal strength threshold; If the signal strength mean is less than or equal to a second signal strength threshold, determining whether the packet loss rate is greater than a packet loss rate threshold; If the packet loss rate is greater than the packet loss rate threshold, a control instruction is issued to adjust the wireless module transmission power by one step; if the packet loss rate is less than or equal to the packet loss rate threshold, the wireless module transmission power is kept unchanged; If the signal strength mean is greater than a second signal strength threshold, determining whether the packet loss rate is less than or equal to a packet loss rate threshold; If the packet loss rate is less than or equal to the packet loss rate threshold, a control instruction is issued to adjust the wireless module transmission power to decrease by one step; if the packet loss rate is greater than the packet loss rate threshold, the wireless module transmission power is kept unchanged.

2. The system for dynamically adjusting radio frequency power of a low-power device according to claim 1, wherein: The packet loss rate is calculated according to the following formula: Packet loss rate = (total number of packets sent - number of packets successfully received) / total number of packets sent.

3. The system for dynamically adjusting radio frequency power of a low-power device according to claim 1, wherein: When the wireless module transmit power is adjusted to increase by one step, the adjusted wireless module transmit power is less than or equal to the maximum transmit power of the wireless module.

4. The system for dynamically adjusting radio frequency power of a low-power device according to claim 1, wherein: When the wireless module transmit power is adjusted to decrease by one step, the adjusted wireless module transmit power is greater than or equal to the minimum transmit power of the wireless module.

5. The system for dynamically adjusting radio frequency power of a low-power device according to claim 1, wherein: The device management system is further configured to record an anomaly and send an interference alarm after the packet loss rate is greater than a packet loss rate threshold and the wireless module transmission power is kept unchanged.

6. The system for dynamically adjusting radio frequency power of a low-power device according to claim 1, wherein: The wireless module includes: a low-power module, a data acquisition and wake-up module, a main controller and a wireless radio frequency module, wherein the low-power module and the data acquisition and wake-up module are respectively connected to the main controller by signal, and the main controller is connected to the wireless radio frequency module by signal; The main controller is used to calculate the packet loss rate of the wireless module by counting and collecting serial port packets and wireless transmission response packets; The device management system is further configured to send a wireless module packet loss rate query instruction to the wireless access point, so that the wireless access point sends a query to the wireless module when responding to data next time to obtain the packet loss rate of the wireless module in the current power consumption assessment adjustment period.

7. A method for dynamically adjusting radio frequency power of a low-power device, applied to the system for dynamically adjusting radio frequency power of a low-power device as claimed in claim 1, characterized in that: include: Obtain the total number of sent data packets, the number of successfully received data packets, and the signal strength value of the wireless module during the current power consumption assessment adjustment period; Calculating the packet loss rate of the wireless module within the current power consumption evaluation adjustment period based on the total number of sent data packets and successfully received data packets; Calculating the average signal strength of the wireless module within the current power consumption evaluation adjustment period based on the signal strength value; Determining whether the signal strength mean is less than a first signal strength threshold; If the mean signal strength is less than the first signal strength threshold, issue a control instruction to increase the transmit power of the wireless module by one step; if the mean signal strength is greater than or equal to the first signal strength threshold, determine whether the mean signal strength is less than or equal to a second signal strength threshold, and the second signal strength threshold is greater than the first signal strength threshold; If the signal strength mean is less than or equal to a second signal strength threshold, determining whether the packet loss rate is greater than a packet loss rate threshold; If the packet loss rate is greater than the packet loss rate threshold, a control instruction is issued to adjust the wireless module transmission power by one step; if the packet loss rate is less than or equal to the packet loss rate threshold, the wireless module transmission power is kept unchanged; If the signal strength mean is greater than a second signal strength threshold, determining whether the packet loss rate is less than or equal to a packet loss rate threshold; If the packet loss rate is less than or equal to the packet loss rate threshold, a control instruction is issued to adjust the wireless module transmission power to decrease by one step; if the packet loss rate is greater than the packet loss rate threshold, the wireless module transmission power is kept unchanged.

Images