Method and system for improving wireless communication quality

Abstract

The invention provides a method and system for improving wireless communication quality, and the method comprises the steps: periodically collecting all wireless signals around, and obtaining a periodically updated channel list; judging whether the strengths of all channels in the channel list corresponding to the current period are lower than a first strength threshold value or not; if yes, locking to use the wireless signals in the channel list for communication; and if not, sorting the channels in the channel list according to the signal strength, obtaining a channel strength list, and locking and using the channel with the lowest signal strength in the channel strength list for communication. Meanwhile, in the communication process, if the received signal strength is higher than a second strength threshold value, the radio frequency front end is controlled to be switched from the receiving LNA mode to the receiving bypass mode. According to the invention, starting from the aspects of circuit construction and transceiving logic, the optimal channel is selected through frequency sweeping interference, the received signal strength is controlled within the optimal dynamic range, and the synchronization of wireless data transmission stability and transmission distance is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring instruments, and in particular to a method and a system for improving the quality of wireless communication. Background Art

[0002] With the advancement of the world's intelligence, more and more electronic devices are spread all over the world, and everything is connected. Wireless communication plays a key role in this. With limited spectrum resources, the ISM band, as a license-free band, is the most active band. At present, many short-distance and low-power communication systems operate in this band, such as 430.050-434.790MHz, which is allocated to amateur radio for small telephones, wireless headsets, remote control and telemetry, wireless walkie-talkies, etc.; 863-870MHz band, wireless gateway LoRaWAN and its networking nodes all work within this frequency band. These products using the ISM band are always facing interference from other radio frequency and microwave technologies, which has a great impact on communication distance and stability. In particular, products closely related to people's lives, such as smart meters and wireless meter reading systems, also use the ISM band for wireless data communication. With the increasing number of networking nodes and the complex environment of the city, the communication distance is uneven and the communication stability is getting worse and worse. It is necessary to densely deploy repeaters or concentrators to ensure the network quality of the wireless communication system.

[0003] In order to reduce the cost of meter network deployment, it is particularly important to improve communication stability and communication distance. The most common way to increase communication distance is to increase the transmission power and improve the receiver's receiving sensitivity. However, in the ISM unlicensed band, although spectrum resources are shared, in order to reduce signal radiation to the human body and reduce mutual interference between devices, the Radio Working Committees of various countries have set limits on the maximum transmission power of the equipment; and the increase in transmission power also requires higher power consumption of the equipment. In addition, as far as the equipment system is concerned, due to the limitations of white noise, modulation method, communication data volume and other factors, the receiving sensitivity is theoretically fixed, and it is very difficult to improve.

[0004] For smart meters, since they are powered by AC power and the communication module is placed in the structural cavity, they need to face internal interference such as power supply AC to DC conversion, relay switches, various metering modules, main control quartz crystals, etc., and most meters are installed near residential buildings, and external interference from other wireless communication devices in the home is inevitable. These interferences restrict the communication distance and communication stability. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a method and system for improving the quality of wireless communication, which can significantly improve the communication distance and stability of wireless communication at the same time.

[0006] In order to solve the above technical problems, the first technical solution adopted by the present invention is:

[0007] A method for improving wireless communication quality, comprising:

[0008] In the idle receiving state, all surrounding wireless signals are periodically collected to obtain a periodically updated channel list;

[0009] Determine whether the strengths of all channels in the channel list corresponding to the current period are lower than a first strength threshold;

[0010] If so, locking the wireless signal in the channel list for communication;

[0011] If not, the channels in the channel list are sorted according to the signal strength, a channel strength list is obtained, and the channel with the lowest signal strength in the channel strength list is locked for communication.

[0012] Optionally, it also includes:

[0013] During the communication process, the current received signal strength is judged in real time;

[0014] If the received signal strength is lower than the second strength threshold, controlling the RF front end to operate in a receiving LNA mode;

[0015] If the received signal strength is higher than the second strength threshold, the RF front end is controlled to operate in a receive bypass mode.

[0016] Optionally, it also includes:

[0017] The signal strength sent by the RF front end to the transceiver modem is controlled within a third strength threshold.

[0018] Another technical solution provided by the present invention is:

[0019] A wireless communication quality improvement system includes a smart meter and a terminal device; the smart meter includes a wireless communication module; the terminal device is wirelessly connected to the wireless communication module;

[0020] The wireless communication module is configured to implement the steps included in the above-mentioned method for improving the quality of wireless communication.

[0021] Optionally, the wireless communication module includes an antenna, a harmonic filtering module, a radio frequency front-end module, a conditioning and frequency selection module, a transceiver modem and a main control module connected in sequence; the antenna is wirelessly connected to the terminal device;

[0022] The RF front-end module is configured to periodically collect all surrounding wireless signals in an idle receiving state;

[0023] The conditioning and frequency selection module is configured to filter out wireless signals in a frequency band not supported by the wireless communication module, and send the filtered wireless signals to the transceiver modem;

[0024] The transceiver modem is configured to determine the frequency and signal strength of the corresponding channel according to the wireless signal sent by the conditioning and frequency selection module, and obtain a periodically updated channel list;

[0025] The main control module is configured to determine whether the strength of all channels in the channel list of the current cycle is lower than a first strength threshold; if so, lock and use the wireless signals in the channel list for communication; if not, sort the channels in the channel list according to signal strength, obtain a channel strength list, and lock and use the channel with the lowest signal strength in the channel strength list for communication.

[0026] Optionally, it also includes: a transmission matching and link gain control module; the transmission matching and link gain control module is connected to the RF front-end module and the transceiver modem respectively.

[0027] Optionally, it also includes a power module and an interface module; the power module and the interface module are respectively connected to the main control module.

[0028] Optionally, the RF front-end module includes a power amplifier PA, a RF switch and a low noise amplifier LNA; the antenna is connected to the power amplifier PA and the low noise amplifier LNA respectively through the RF switch; the power amplifier PA and the low noise amplifier LNA are connected to the transceiver modem respectively;

[0029] The low noise amplifier LNA is configured to operate in a receiving LNA mode by default, and to switch to a receiving bypass mode when it is determined that the received signal strength is higher than a second strength threshold.

[0030] Optionally, the conditioning and frequency selection module includes a frequency selection chip, a signal conditioning unit and three capacitors; the output end of the RF front-end module is connected to the input end of the frequency selection chip through two capacitors connected in series; the two capacitors connected in series are grounded through the signal conditioning unit; the output end of the frequency selection chip is connected to the transceiver modem through a capacitor.

[0031] Optionally, the signal conditioning unit includes a first diode and a second diode connected in reverse parallel; an anode of the first diode is connected to the ground, and a cathode of the first diode is connected between the two capacitors connected in series.

[0032] The beneficial effects of the present invention are as follows: by screening out clean channels and locking the frequency before establishing communication, the clean channels are used to establish communication during the handshake request process, thereby ensuring a longer transmission distance; by optimizing the working mode of the RF receiving front end during the communication process, the RF receiving front end can automatically switch to different working modes according to the received signal strength, thereby avoiding the problem of channel blockage and signal distortion caused by too strong signal amplitude, thereby improving signal stability. Therefore, the present invention can greatly improve the communication distance and increase the communication stability at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The steps performed by the wireless communication module in the embodiment of the present invention to improve the quality of wireless communication;

[0034] Figure 2 A schematic diagram of the composition and connection of a wireless communication module in an embodiment of the present invention;

[0035] Figure 3 The steps performed by the radio frequency front-end module in the wireless communication module in the embodiment of the present invention to improve the quality of wireless communication;

[0036] Figure 4 This is a schematic diagram of the circuit structure of the antenna + harmonic filter module + radio frequency front-end module in the wireless communication module in the fourth embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the integrated structure of a radio frequency front-end module in a wireless communication module according to a fourth embodiment of the present invention;

[0038] Figure 6 Schematic diagram of the structure of the conditioning and frequency selection module in the wireless communication module of the fourth embodiment of the present invention;

[0039] Figure 7 Schematic diagram of a limiting characteristic curve of a signal conditioning unit in a wireless communication module according to a fourth embodiment of the present invention;

[0040] Figure 8 It is a structural diagram of a transceiver modem in a wireless communication module according to a fourth embodiment of the present invention;

[0041] Fig. 9 Schematic diagram of the circuit structure of the transceiver modem in the wireless communication module of the fourth embodiment of the present invention;

[0042] Fig.10 This is a schematic diagram of the circuit structure of a main control module in a wireless communication module according to a fourth embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0044] The key concept of the present invention is to select clean channels and lock the frequency before establishing communication to ensure a longer transmission distance; during the transmission process, the working mode of the RF receiving front end is optimized according to the received signal strength to ensure the stability of signal transmission.

[0045] The clean channel refers to an interference-free channel, that is, a channel in a communication network that is not interfered by other signals. In wireless communications, a clean channel means that the signal transmission on the channel is not interfered by other wireless devices, thereby providing better communication quality and a longer communication distance.

[0046] Embodiment 1

[0047] Please refer to Figure 1 , this embodiment provides a system for improving the quality of wireless communication.

[0048] This embodiment provides a system for improving wireless communication quality, including a smart meter and a terminal device; the smart meter includes a wireless communication module; the terminal device is wirelessly connected to the wireless communication module;

[0049] The wireless communication module is configured to achieve Figure 1 The following steps are shown:

[0050] S1: In the idle receiving state, periodically collect all surrounding wireless signals and obtain a periodically updated channel list;

[0051] The idle receiving state refers to the state before the wireless communication module and the terminal device have established a communication connection relationship to generate data exchange. At this time, the wireless communication module is always in the idle receiving state.

[0052] It can be understood that the wireless communication module can receive interference signals and clutter from nearby when in an idle receiving state; at the same time, the wireless communication module dedicated to the smart meter has a unique analog-to-digital conversion function, which can collect and obtain the signal strength of the wireless signal through analog-to-digital conversion. Therefore, the wireless communication module of this embodiment can periodically collect all wireless signals in the surrounding area and obtain the channel list corresponding to each collection period.

[0053] Preferably, based on data storage optimization considerations, the channel list is stored in an iterative update manner, that is, the channel list corresponding to the latest acquisition cycle will replace the channel list of the previous acquisition cycle.

[0054] S2: Determine whether the strengths of all channels in the channel list corresponding to the current cycle are lower than the first strength threshold; if so, execute S3; if not, execute S4;

[0055] The first strength threshold is a preset signal strength comparison threshold value, which can be selected as -75dBm. By comparing and judging with the first strength threshold, it is possible to efficiently and accurately determine whether the compared channel is a clean channel.

[0056] S3: Locking and using the wireless signal in the channel list for communication;

[0057] Here, when all channels in the channel list are clean channels, the wireless communication module is locked to use the channels in the channel list for communication, which can ensure that the smart meter always uses clean channels for communication interaction, thereby ensuring a longer transmission distance, higher transmission quality and stronger communication reliability.

[0058] In some specific implementations, if a channel in the currently used channel list cannot establish a connection with the terminal device, other channels in the channel list are sequentially selected to retry establishing a connection. Preferably, the channels in the channel list are sorted according to signal strength, and the channel with the lowest strength is preferentially selected.

[0059] S4: Sort the channels in the channel list according to signal strength, obtain the channel strength list, and lock on to use the channel with the lowest signal strength in the channel strength list for communication.

[0060] Here, when there are unclean channels among all the channels in the channel list, the wireless communication module is locked to use the "cleanest" channel in the channel list for communication, which can ensure that the smart meter uses a clean channel for communication interaction, thereby ensuring a longer transmission distance, higher transmission quality and stronger communication reliability.

[0061] This embodiment is aimed at the wireless communication module in the smart meter. Before establishing communication, it collects the surrounding spectrum and signal strength, determines the clean channel and locks the frequency after analog-to-digital conversion. When initiating a handshake request to the terminal device, it directly uses the clean channel to establish a communication connection with the terminal device, which will greatly improve the communication distance and ensure a longer transmission distance, thereby obtaining higher communication stability, higher transmission quality and stronger communication reliability.

[0062] Embodiment 2

[0063] See also Figure 2 This embodiment is further expanded based on the above-mentioned embodiment 1, and is specifically refined for the wireless communication module in the smart meter.

[0064] The wireless communication quality improvement system of this embodiment is provided in a wireless communication module in a smart meter, such as Figure 2As shown, it specifically includes an antenna, a harmonic filtering module, a radio frequency front-end module, a conditioning and frequency selection module, a transceiver modem and a main control module connected in sequence; the antenna is wirelessly connected to the terminal device.

[0065] In this embodiment, the RF front-end module is configured to periodically collect all surrounding wireless signals in an idle receiving state;

[0066] The conditioning and frequency selection module is configured to filter out wireless signals in a frequency band not supported by the wireless communication module, and send the filtered wireless signals to the transceiver modem;

[0067] The transceiver modem is configured to determine the frequency and signal strength of the corresponding channel according to the wireless signal sent by the conditioning and frequency selection module, and obtain a periodically updated channel list;

[0068] The main control module is configured to determine whether the strength of all channels in the channel list of the current cycle is lower than a first strength threshold; if so, lock and use the wireless signals in the channel list for communication; if not, sort the channels in the channel list according to signal strength, obtain a channel strength list, and lock and use the channel with the lowest signal strength in the channel strength list for communication.

[0069] In some specific implementations, the wireless communication module further includes a transmission matching and link gain control module; the transmission matching and link gain control module are respectively connected to the RF front-end module and the transceiver modem.

[0070] Here, the transmission matching and link gain control module is configured to perform signal amplitude or power enhancement processing on the signal to be transmitted and then send it to the RF front-end module to control transmission.

[0071] In some specific implementations, the wireless communication module further includes a power module and an interface module; the power module and the interface module are respectively connected to the main control module.

[0072] Here, the power module is configured to provide a power source for the components in the wireless communication module to ensure the normal operation of each component; the interface module is configured to provide an access path for other devices.

[0073] The wireless communication module provided in this embodiment has the characteristics of simple structure. At the same time, through the cooperation of the functions of each module therein, it can collect the surrounding spectrum and signal strength before the wireless communication module communicates, determine the clean channel and lock the frequency after analog-to-digital conversion, and directly use the clean channel to establish a communication connection relationship with the terminal device when initiating a handshake request to the terminal device. As a result, the wireless communication module can greatly improve the communication distance and ensure a longer transmission distance; thereby obtaining higher communication stability, higher transmission quality and stronger communication reliability.

[0074] Embodiment 3

[0075] See also Figure 3 This embodiment is further expanded based on the above-mentioned embodiment 1 or embodiment 2, and specifically optimizes the radio frequency front end of the wireless communication module therein to further improve the stability of wireless communication.

[0076] In this embodiment, the wireless communication module, specifically the RF front-end module, is further configured to implement the following Figure 3 The following steps are shown:

[0077] S5: During the communication process, the current received signal strength is judged in real time;

[0078] Here, the communication process refers to when the wireless communication module of the smart meter establishes a communication connection relationship with the terminal device and generates data interaction. At this time, the wireless communication module is in a data receiving state, and while demodulating the transmitted information, it still determines the signal strength through analog-to-digital conversion.

[0079] S6: If the received signal strength is lower than the second strength threshold, control the RF front end to operate in a receiving LNA mode;

[0080] S7: If the received signal strength is higher than the second strength threshold, control the RF front end to operate in a receive bypass mode.

[0081] The RF front-end module has two working modes: receiving LNA mode and receiving bypass mode.

[0082] The receiving LNA mode refers to the normal working mode of the RF receiver, which amplifies the received weak signal through LNA while minimizing the introduction of noise, improving the receiving sensitivity and signal quality, and ensuring that the weak signal can also be accurately demodulated.

[0083] The receiving bypass mode refers to a special working mode of the RF receiver, which bypasses the LNA to directly process the signal and transmits it through the bypass, thereby avoiding the influence of channel blockage when a large signal is input.

[0084] It is understandable that when the signal strength is too strong to exceed the dynamic demodulation range of the transmitting and receiving modems, the signal will be distorted.

[0085] In this embodiment, the second strength threshold, ie, another signal strength comparison threshold value, is pre-set, which may be -10 dBm; and this is used as a basis for determining whether the signal strength is too strong.

[0086] When the received signal strength is lower than the second strength threshold, it means that the received signal is not too strong. The RF front end will be controlled to work in the receiving LNA mode. Although amplification processing can be performed, it is still within the dynamic adjustment range of the transceiver modem and can accurately demodulate the signal.

[0087] When the received signal strength is higher than the second strength threshold, it means that the received signal is too strong. If the receive LNA mode is still used, the LNA will introduce additional noise, thereby interfering with the signal and reducing the signal quality. Therefore, by switching the RF front end to the receive bypass mode, it is possible to avoid introducing additional noise when the signal strength is too strong. At this time, the received signal does not need to be amplified and is within the dynamic modulation range of the transceiver modem, so the signal can be accurately demodulated.

[0088] As can be seen from the above, this embodiment optimizes the RF front end of the wireless communication module to effectively avoid channel congestion and signal distortion caused by excessive amplitude of the received signal, thereby ensuring communication stability and reliability.

[0089] Embodiment 4

[0090] Please refer to Figures 4 to 10 This embodiment is further expanded based on the above-mentioned embodiment 2 or embodiment 3 to improve the structure of the wireless communication module.

[0091] The circuit structure of the antenna + harmonic filter module + RF front-end module in the wireless communication module of this embodiment is as follows: Figure 4 As shown; the structure of the RF front-end module is as follows Figure 5 shown.

[0092] The RF front-end module specifically includes a power amplifier PA, a RF switch and a low noise amplifier LNA. Figure 5 As shown, the power amplifier PA, the RF switch and the low noise amplifier LNA are integrated into an IC device. It can be understood that the antenna is connected to the power amplifier PA and the low noise amplifier LNA respectively through the RF switch; the power amplifier PA and the low noise amplifier LNA are connected to the transceiver modem respectively.

[0093] In this embodiment, the low noise amplifier LNA is configured to work in the receiving LNA mode by default, and switch to the receiving bypass mode when it is determined that the received signal strength is higher than the second strength threshold.

[0094] based on Figure 5 The integrated structure of the low noise amplifier LNA realizes the switching of different working modes by enabling the three pin levels of CSD, CTX and CPS. The switching logic is shown in Table 1 below:

[0095] CSD CTX CPS Mode Selection High level High level High level Transmit mode, PA on High level Low level Any status is OK Receive LNA Mode High level High level Low level Receive Bypass Mode

[0096] Table 1

[0097] Combination Figure 4 and Figure 5 The working principle of the RF front-end module is as follows: The wireless communication module is in the idle receiving state. Figure 5 In the RF front-end module shown, the CSD pin is set to a high level and the CTX pin is set to a low level by default, so that the RF front-end module works in the receiving LNA mode; Figure 4 The antenna J600 shown receives all interference signals and clutter in the environment near the wireless communication module, and after the high-frequency signal amplitude is suppressed by the harmonic filtering module, it is input to pin 9 of U600 in the RF front-end module, and the interference signal and clutter are given to the low-noise amplifier LNA of the RF front-end module, which is processed by the LNA and output to the conditioning and frequency selection module.

[0098] When the received signal strength is lower than -10dBm, the RF front-end module chooses to work in the receive LNA mode. At this time, although the received signal is amplified, it can continue to be within the dynamic demodulation range of the transceiver modem;

[0099] When the received signal strength is higher than -10dBm, the RF front-end module chooses to work in the receive bypass mode, that is, the received signal will not be amplified, and the received signal will be controlled within the dynamic demodulation range of the transceiver modem.

[0100] The structure of the conditioning and frequency selection module in the wireless communication module of this embodiment is as follows: Figure 6 As shown, it specifically includes a frequency selection chip U1, a signal conditioning unit and three capacitors; the signal conditioning unit includes a first diode and a second diode connected in reverse parallel; the output end of the RF front-end module is connected to the input end of the frequency selection chip through two capacitors connected in series; the two capacitors connected in series are grounded through the signal conditioning unit; wherein the anode of the first diode in the signal conditioning unit is connected to the ground, and the cathode thereof is connected between the two capacitors connected in series; the output end of the frequency selection chip is connected to the transceiver modem through a capacitor.

[0101] The limiting characteristic curve of the signal conditioning unit is as follows: Figure 7 As shown, when the input signal strength is lower than 10dBm, the input and output are positively correlated, and the signal conditioning unit does not operate; when the input signal strength is higher than 10dBm, the signal conditioning unit starts to operate to adjust the output signal amplitude; when the input signal amplitude reaches 28dBm, the output signal is adjusted to the maximum value of 17dBm, and thereafter no matter how the input signal increases, the output signal is controlled below 17dBm, that is, the input signal strength of the RFIP pin of the transceiver modem chip is strictly controlled within 17dBm, thereby ensuring that the transceiver modem chip will not cause channel congestion or even burn out due to excessive input signals.

[0102] Combination Figure 6 and Figure 7 The working principle of the conditioning and frequency selection module is as follows: the signal sent by the RF front-end module will be filtered out of the signal outside the frequency band supported by the wireless communication module through the conditioning and frequency selection module, and the signal within the frequency band will be selected to be given to the RFIP pin of the transceiver modem. In addition, when the distance between the terminal device and the wireless communication module is very close, the power sent by the terminal device, after amplification by the LNA of the RF front-end module, the signal strength given to the chip RFIP pin of the transceiver modem may exceed the maximum receivable signal strength of the RFIP pin of 17dBm, thereby causing channel congestion or burning the transceiver modem chip. Therefore, by adding the signal conditioning unit between the RF front-end module and the transceiver modem, the diode single-phase limiter tube is selected through the signal conditioning unit, and the diode clamping effect is used to achieve wave clipping and amplitude limiting, so as to strictly control the input signal strength of the chip RFIP pin of the transceiver modem within 17dBm, thereby ensuring the safety and reliability of the transceiver modem chip.

[0103] The structure of the transceiver modem in the wireless communication module of this embodiment is as follows: Figure 8 As shown, its circuit structure is as follows Fig. 9 shown.

[0104] Combination Figure 8 and Fig. 9 The working principle of the transceiver modem is as follows: after the transceiver modem receives the signal sent by the conditioning and frequency selection module through the RFIP pin, it will complete signal amplification, mixing, smoothing filtering, and analog-to-digital conversion inside the transceiver modem to obtain all channel list frequency points and signal strength information; all channel list frequency points and signal strength information read by the transceiver modem are given to the main control module through the SPI interface (specifically pins 3, 4, 5, and 6 of the main control chip U503).

[0105] The circuit structure of the main control module in the wireless communication module of this embodiment is as follows: Fig.10 shown.

[0106] Combination Fig.10 , the working principle of the main control module is as follows:

[0107] Fig.10 The main control module shown is Fig. 9 The transceiver modems shown are connected via an SPI interface. After the transceiver modems demodulate the input signal into a digital signal, they are sent to the digital signal through RF-SI, RF-SO, RF-CLK, and RF-CS (i.e. Fig.10 The pins 50, 49, 51, and 48 of the U502 device in the main control module are provided to the main control chip U502 of the main control module; the main control module pre-sets the comparison threshold value to -75dBm, that is, the first strength threshold, and compares the signal strength sent by the conditioning and frequency selection module with the first strength threshold. The judgment process is as follows:

[0108] 1. If the signal strength of all channels is less than -75dBm, it means that all channels are clean channels. At this time, the main control module sends a command to the transceiver modem to lock the current channel list for communication;

[0109] 2. If the signal strength of all channels is greater than -75dBm, it means that a channel is interfered. At this time, the main control module sorts all channel signals according to their strength and selects the channel with the lowest signal strength. The main control module sends a command to the transceiver modem to lock the channel with the lowest signal strength for communication.

[0110] Based on the above wireless communication module structure, when communicating with the terminal device, a handshake request command will be initiated according to the locked clean channel, and after the handshake is successful, the channel will be locked for normal data interaction. This ensures that the wireless communication module of the smart meter always uses a clean channel to interact with the terminal device, ensuring both a longer transmission distance and the communication stability and reliability of the longer transmission distance.

[0111] Embodiment 5

[0112] See also Figure 1 This embodiment provides a method for improving the quality of wireless communication based on any of the above embodiments.

[0113] like Figure 1 As shown, this embodiment provides a method for improving wireless communication quality, including:

[0114] S1: The wireless communication module is in an idle receiving state, periodically collecting all surrounding wireless signals and obtaining a periodically updated channel list;

[0115] S2: Determine whether the strengths of all channels in the channel list corresponding to the current cycle are lower than the first strength threshold; if so, execute S3; if not, execute S4;

[0116] S3: Locking and using the wireless signal in the channel list for communication;

[0117] S4: Sort the channels in the channel list according to signal strength, obtain the channel strength list, and lock on to use the channel with the lowest signal strength in the channel strength list for communication.

[0118] This embodiment can ensure that the smart meter uses a clean channel for communication interaction by locking the wireless communication module to use a "clean" channel for communication, thereby ensuring a longer transmission distance, higher transmission quality and stronger communication reliability.

[0119] The lifting method of this embodiment is as follows: Figure 3 As shown, it also includes:

[0120] S5: During the communication process, the current received signal strength is judged in real time;

[0121] S6: If the received signal strength is lower than the second strength threshold, control the RF front end to operate in a receiving LNA mode;

[0122] S7: If the received signal strength is higher than the second strength threshold, control the RF front end to operate in a receive bypass mode.

[0123] In some specific implementations, the method for improving wireless communication quality further includes:

[0124] S8: Control the signal strength sent from the RF front end to the transceiver modem within a third strength threshold. The third strength threshold refers to the maximum receivable signal strength of the chip RFIP pin of the transceiver modem, such as 17dBm. If the signal strength input from the RF front end module to the chip RFIP pin of the transceiver modem exceeds the third strength threshold, it may cause channel congestion or burn the transceiver modem chip. Therefore, by setting the third strength threshold, the signal strength input from the RF front end module to the transceiver modem is controlled within the third strength threshold, which can protect the transceiver modem.

[0125] To sum up, the method and system for improving the quality of wireless communication provided by the present invention, without increasing the transmission power, transmission power consumption, and receiving sensitivity, starts from the circuit structure and transceiver logic, selects the optimal channel through frequency scanning interference, and controls the received signal strength within the optimal dynamic range. The technical means can achieve a significant improvement in the stability of wireless data transmission and the transmission distance, and can reduce the number of network transmission relay devices.

[0126] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for improving wireless communication quality, characterized in that: include: In the idle receiving state, all surrounding wireless signals are periodically collected to obtain a periodically updated channel list; Determine whether the strengths of all channels in the channel list corresponding to the current period are lower than a first strength threshold; If so, locking the wireless signal in the channel list for communication; If not, the channels in the channel list are sorted according to the signal strength, a channel strength list is obtained, and the channel with the lowest signal strength in the channel strength list is locked for communication.

2. The method for improving wireless communication quality according to claim 1, wherein: Also includes: During the communication process, the current received signal strength is judged in real time; If the received signal strength is lower than the second strength threshold, controlling the RF front end to operate in a receiving LNA mode; If the received signal strength is higher than the second strength threshold, the RF front end is controlled to operate in a receive bypass mode.

3. The method for improving wireless communication quality according to claim 1, wherein: Also includes: The signal strength sent by the RF front end to the transceiver modem is controlled within a third strength threshold.

4. A system for improving wireless communication quality, characterized in that: It includes a smart meter and a terminal device; the smart meter includes a wireless communication module; the terminal device is wirelessly connected to the wireless communication module; The wireless communication module is configured to implement the steps included in the method for improving wireless communication quality as described in any one of claims 1 to 3.

5. A wireless communication quality improvement system as claimed in claim 4, characterized in that: The wireless communication module includes an antenna, a harmonic filtering module, a radio frequency front-end module, a conditioning and frequency selection module, a transceiver modem and a main control module connected in sequence; the antenna is wirelessly connected to the terminal device; The RF front-end module is configured to periodically collect all surrounding wireless signals in an idle receiving state; The conditioning and frequency selection module is configured to filter out wireless signals in a frequency band not supported by the wireless communication module, and send the filtered wireless signals to the transceiver modem; The transceiver modem is configured to determine the frequency and signal strength of the corresponding channel according to the wireless signal sent by the conditioning and frequency selection module, and obtain a periodically updated channel list; The main control module is configured to determine whether the strength of all channels in the channel list of the current cycle is lower than a first strength threshold; if so, lock and use the wireless signals in the channel list for communication; if not, sort the channels in the channel list according to signal strength, obtain a channel strength list, and lock and use the channel with the lowest signal strength in the channel strength list for communication.

6. A wireless communication quality improvement system as claimed in claim 5, characterized in that: Also includes: Transmitting matching and link gain control module; the transmitting matching and link gain control module are respectively connected to the RF front-end module and the transceiver modem.

7. A system for improving wireless communication quality as claimed in claim 5, characterized in that: It also includes a power module and an interface module; the power module and the interface module are respectively connected to the main control module.

8. A system for improving wireless communication quality as claimed in claim 5, characterized in that: The RF front-end module includes a power amplifier PA, a RF switch and a low noise amplifier LNA; the antenna is connected to the power amplifier PA and the low noise amplifier LNA respectively through the RF switch; the power amplifier PA and the low noise amplifier LNA are connected to the transceiver modem respectively; The low noise amplifier LNA is configured to operate in a receiving LNA mode by default, and to switch to a receiving bypass mode when it is determined that the received signal strength is higher than a second strength threshold.

9. A system for improving wireless communication quality as claimed in claim 5, characterized in that: The conditioning and frequency selection module includes a frequency selection chip, a signal conditioning unit and three capacitors; the output end of the RF front-end module is connected to the input end of the frequency selection chip through two capacitors connected in series; the two capacitors connected in series are grounded through the signal conditioning unit; the output end of the frequency selection chip is connected to the transceiver modem through a capacitor.

10. A wireless communication quality improvement system as claimed in claim 9, characterized in that: The signal conditioning unit includes a first diode and a second diode connected in reverse parallel; an anode of the first diode is grounded, and a cathode of the first diode is connected between the two capacitors connected in series.

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