System and method for dynamically adjusting radio frequency power of low-power-consumption equipment

Abstract

The invention discloses a system and a method for dynamically adjusting radio frequency power of low-power-consumption equipment. The invention relates to the technical field of communication, and solves the problem of how to reduce the radio frequency power consumption of wireless mobile equipment on the basis of ensuring the signal transmission reliability of the wireless mobile equipment. The system for dynamically adjusting the radio frequency power of the 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; according to the method, the transmitting power of the wireless module is adjusted according to the packet loss rate and the signal intensity mean value of the wireless module in the current power consumption evaluation adjustment period, the standby time of the low-power-consumption wireless equipment is prolonged, and the radio frequency power consumption is reduced. The configuration flexibility and adaptability of wireless products are improved, and the radio frequency power can be dynamically adjusted 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; 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 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.

[0005] Furthermore, 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.

[0006] Furthermore, 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, 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; 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.

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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; 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.

[0011] 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: 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 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; 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, 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; 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.

[0012] The present invention has the following beneficial effects: A system and method for dynamically adjusting radio frequency power for low-power devices adjusts the transmit power of wireless modules based on the packet loss rate and average signal strength of the wireless modules within the current power consumption assessment and adjustment period, thereby increasing the standby time of low-power wireless devices and reducing radio frequency power consumption. This improves the flexibility and adaptability of wireless product configurations and allows for dynamic adjustment of radio frequency power based on different implementation environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0014] Figure 1 A block diagram of the system architecture for dynamically adjusting RF power for low-power devices; Figure 2 This is the basic block diagram of the wireless module; Figure 3 This is a flowchart for adjusting the transmit power of the wireless module. DETAILED DESCRIPTION

[0015] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. The technical solutions provided by each embodiment of the present invention are described in detail below in conjunction with the drawings.

[0016] See also Figure 1 An embodiment of the present invention provides a system for dynamically adjusting radio frequency power of low-power devices, including: 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.

[0017] Among them, the wireless module transmits wireless data to the wireless access point; after receiving the wireless data, the wireless access point extracts the signal strength value and the corresponding wireless module device number, and forwards the signal strength value and the corresponding wireless module device number related information to the device management system through the gateway; after receiving the information, the device management system starts timing. When a power consumption assessment adjustment period is reached, it sends 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 it responds to data next time 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 (Packet Error Ratio, PER) 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; calculates the average signal strength of the wireless module during the current power consumption assessment adjustment period based on the received signal strength indication (RSSI) value; and adjusts the transmit power of the wireless module based on the packet loss rate and the average signal strength.

[0018] See also Figure 2 The wireless module has a low-power sleep function and a radio frequency transceiver function, specifically including: a low-power module, a data acquisition wake-up module, a main controller and a wireless radio frequency module. The low-power module and the data acquisition wake-up module are respectively connected to the main controller signal, and the main controller is connected to the wireless radio frequency module signal; the main controller can calculate the packet loss rate of the wireless module by counting the collected serial port packets and the wirelessly sent response packets; the device management system can be used to send a command to query the wireless module packet loss rate to the wireless access point, so that the wireless access point sends a query to the wireless module when responding to data next time, so as to obtain the packet loss rate of the wireless module within the current power consumption assessment adjustment period.

[0019] In the following, TIME_C represents the power consumption assessment adjustment period, RSSI represents the signal strength average, RSSI_LOW represents the first signal strength threshold, RSSI_HIGH represents the second signal strength threshold, PER represents the packet loss rate, and PER_MIN represents the packet loss rate threshold.

[0020] 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.

[0021] Specifically, the device management system adjusts the wireless module transmission power according to the following method: Determining whether the signal strength mean is less than a first signal strength threshold; 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; 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; 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.

[0022] Taking the example of a wireless module receiving signals from a terminal measuring device, when the wireless module receives the signals from the terminal measuring device, it converts them into wireless data and transmits it to the wireless access point, and increases the total number of sent data packets. When receiving the response signal from the wireless access point, it increases the total number of sent data packets and records the above packet numbers in real time according to the usage situation.

[0023] After receiving the wireless data information, the wireless access point extracts its wireless signal strength and the corresponding wireless module device number, and uploads them to the device management system for recording; when the device management system receives this information, it starts timing. When the power consumption evaluation adjustment period TIME_C is reached, it issues an instruction to query the transceiver situation of this wireless module. For example, if TIME_C is 1 hour, the appropriate time can be adjusted according to the specific working duration of the terminal.

[0024] After receiving the inquiry instruction, the wireless module uploads the specifically recorded number of received and sent packets to the device management system, clears the packet numbers and starts counting again; the device management system calculates the packet loss rate of the device according to the specific packet numbers. For example, 2000 packets are sent, and 2000 packets are replied, and the calculated packet loss rate is 0%. Calculate the average signal strength, for example, -55dBm. Judge and adjust the power according to the packet loss rate and the average signal strength as follows: If the signal is weak and the packet loss rate is high, that is, RSSI < RSSI_LOW, then increase the current transmission power by one step, not exceeding the maximum allowable power.

[0025] If the signal is medium and the packet loss rate is high, that is, RSSI ≤ RSSI_HIGH, PER>PER_MIN, then increase the current transmission power by one step, not exceeding the maximum allowable power.

[0026] If the signal is medium and the packet loss rate is medium, that is, RSSI ≤ RSSI_HIGH, PER>PER_MIN, then keep the current transmission power.

[0027] If the signal is strong and the packet loss rate is low, that is, RSSI>RSSI_HIGH and PER≤PER_MIN, then reduce the current transmission power by one step, not less than the minimum guaranteed power, to ensure basic coverage.

[0028] If the signal is strong but the packet loss rate is high, that is, RSSI>RSSI_HIGH but PER>PER_MIN, then keep the current power, record this abnormal state for upper-layer application analysis. Trigger an error report to the monitoring system.

[0029] 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.

[0030] 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: 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; 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. Determining whether the signal strength mean is less than a first signal strength threshold; 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; 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; 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.

[0031] 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.

[0032] 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; The average signal strength of the wireless module in the current power consumption evaluation adjustment period is calculated according to the signal strength value; and the transmit power of the wireless module is adjusted according to the packet loss rate and the average signal strength.

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: 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.

4. The method for dynamically adjusting radio frequency power of a low-power device according to claim 3, 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.

5. The method for dynamically adjusting radio frequency power of a low-power device according to claim 3, 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.

6. The method for dynamically adjusting radio frequency power of a low-power device according to claim 3, 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.

7. 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.

8. 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; Calculate 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.

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