Dual-mode near field communication system

Abstract

The invention discloses a dual-mode near field communication system, which relates to the technical field of communication, and is technically characterized by comprising a communication control unit, a mode switching controller and an antenna assembly, the communication control unit is integrated with a Bluetooth module and a near field communication (NFC) module; the mode switching controller is connected with the Bluetooth and near field communication module, a signal quality analysis circuit is arranged in the mode switching controller, and Bluetooth RSSI and NFC magnetic field intensity parameters can be collected in real time; the dynamic priority decision maker executes a communication mode selection algorithm according to a preset threshold matrix; the radio frequency switching assembly can complete dual-mode communication channel switching within less than or equal to 3ms; the antenna assembly comprises an omnidirectional antenna working in a 4GHz frequency band and a planar coupling coil working in a 156MHz frequency band; the system design can flexibly cope with a complex communication environment, and efficient and stable communication is realized.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and more particularly to a dual-mode short-range communication system. Background Art

[0002] With the rapid development of mobile terminals, Internet of Things devices, and smart hardware, short-range communication technologies play an increasingly important role in device interconnection, data interaction, identity authentication, etc. Currently, common short-range communication technologies include radio frequency identification (RFID), near field communication (NFC), Bluetooth, infrared communication, etc.

[0003] Although existing short-range communication technologies have achieved certain success in their respective application scenarios, there are still some limitations and it is difficult to meet the increasingly diverse application requirements. Each communication technology has its specific performance indicators such as communication distance, transmission rate, power consumption, etc. A single communication mode often has difficulty adapting to complex and changing application environments. For example, in the mobile payment scenario, although NFC technology is secure and convenient, its communication distance is relatively short and it cannot meet the application requirements that need a certain operating distance; while Bluetooth technology has a relatively long communication distance but is relatively weak in terms of security. Summary of the Invention

[0004] In order to solve the above technical problems, an object of the present invention is to provide a dual-mode short-range communication system, which has a dual-mode communication method and can adapt to complex application environments.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A dual-mode short-range communication system, comprising a communication control unit, a mode switching controller, and an antenna assembly:

[0007] The communication control unit is integrated with a Bluetooth communication module and a near field communication (NFC) module;

[0008] The mode switching controller is connected to the Bluetooth communication module and the near field communication module, and includes:

[0009] A signal quality analysis circuit for real-time acquisition of Bluetooth received signal strength indication (RSSI) and NFC magnetic field strength parameters;

[0010] A dynamic priority decision maker for performing a communication mode selection algorithm based on a preset threshold matrix;

[0011] A radio frequency switching component configured to complete the switching of the dual-mode communication channel within ≤ 3 ms;

[0012] The antenna assembly includes:

[0013] An omnidirectional antenna operating in the 4 GHz frequency band;

[0014] A planar coupling coil operating in the 156 MHz frequency band.

[0015] Preferably, the threshold matrix of the dynamic priority decision maker is configured as:

[0016] When the Bluetooth RSSI ≤ -85 dBm and the NFC magnetic field strength ≥ 5 A / m, activate the NFC communication mode;

[0017] Maintain the Bluetooth broadcast mode during the device pairing phase;

[0018] During the data transmission phase, dynamically allocate the channel bandwidth according to the bit error rate threshold of 1×10 -4 to 1×10 -6

[0019] Preferably, the radio frequency switching component includes:

[0020] A duplex filter bank with out-of-band rejection ≥ 40 dB in the 4 GHz frequency band;

[0021] A switching array based on PIN diodes with a conduction resistance ≤ 5 Ω.

[0022] Preferably, it further includes a dual-mode power consumption management unit configured as:

[0023] Control the duty cycle of the Bluetooth communication module to be adjusted in steps of 1% within the range of 1% - 100%;

[0024] Dynamically adjust the field strength output power of the near-field communication module to 1W - 0W;

[0025] Switch the baseband processor clock frequency to 48 MHz, 96 MHz, or 192 MHz according to the communication mode.

[0026] Preferably, the mode switching controller further includes a human-machine interaction interface, and the human-machine interaction interface includes:

[0027] A capacitive touch sensor that triggers mode reset in response to a three-finger swipe gesture;

[0028] A physical button group that performs factory reset by pressing and holding for 5 ± 5 seconds;

[0029] A light sensor that switches to the standby mode when the ambient illuminance ≤ 10 lux.

[0030] The present invention has the following beneficial effects:

[0031] ​1. Dual-mode communication improves environmental adaptability: The dual-mode short-range communication system is equipped with a Bluetooth communication module and a near-field communication (NFC) module. This dual-mode communication method greatly improves the system's adaptability to complex application environments. In a variety of scenarios, different communication modes have their own advantages. For example, Bluetooth communication is suitable for scenarios with medium and short distances, relatively large data transmission volume, and certain requirements for power consumption; NFC communication is suitable for scenarios with short distances, fast connections, and small data transmission volume, such as mobile payments, access control systems, etc. Through the dual-mode design, the system can flexibly select the appropriate communication mode according to the actual environmental requirements. Whether it is in an environment with more signal interference and a long distance that requires a stable Bluetooth connection, or in a scenario of short-distance and fast interaction, it can ensure smooth communication, thereby effectively responding to complex and changing application environments.

[0032] 2. Dynamic priority decision optimizes communication mode selection: The dynamic priority decider in the mode switching controller executes the communication mode selection algorithm based on the preset threshold matrix. This design brings significant beneficial effects. The dynamic priority decider can accurately determine the communication mode suitable for the current environment by analyzing the signal quality in real time, such as the Bluetooth received signal strength indicator (RSSI) and the NFC magnetic field strength parameters. For example, when the Bluetooth RSSI ≤ -85dBm and the NFC magnetic field strength ≥ 5A / m, the NFC communication mode is activated. This dynamic decision based on signal quality avoids the communication instability problem that may occur in a single mode under specific environments. At the same time, the Bluetooth broadcast mode is maintained during the device pairing stage, and the channel bandwidth is dynamically allocated according to the bit error rate threshold during the data transmission stage. This dynamic adjustment method based on different stages and conditions further optimizes the selection of communication modes, allowing the system to always maintain the best communication state in various complex environments, improving the reliability and efficiency of communication.

[0033] 3. Fast RF switching ensures communication continuity: The RF switching component is configured to complete the switching of dual-mode communication channels within ≤3ms. This feature is crucial to ensuring the continuity of communication. In actual applications, environmental factors may cause changes in signal quality, and communication modes need to be switched quickly to maintain communication. The system's fast RF switching capability can complete the conversion of communication modes in a short time, avoiding communication interruptions or delays caused by mode switching, and ensuring the continuity and stability of communication. Whether switching from Bluetooth to NFC, or from NFC to Bluetooth, channel switching can be completed in a very short time, allowing the system to respond quickly in the face of emergencies, ensuring smooth communication, and no communication interruptions or data loss due to mode switching, providing strong support for communication in complex environments.

[0034] IV. High-efficiency switching components improve system performance: The out-of-band rejection of the duplex filter bank in the RF switching components is ≥40 dB in the 4 GHz band, and the on-resistance of the switching array based on PIN diodes is ≤5 Ω. The application of these high-efficiency components makes the RF switching process more stable and reliable, further ensuring the smooth progress of dual-mode communication. The high-efficiency RF switching components not only improve the overall performance of the communication system but also provide a solid guarantee for the stable operation of the system, enabling the system to operate more stably in complex environments, enhancing the user experience and system reliability, and ensuring efficient and stable communication in various application scenarios.

[0035] V. Dual-mode power consumption management extends device battery life: The dual-mode power consumption management unit is configured to control the duty cycle of the Bluetooth communication module to be adjusted in steps of 1% within the range of 1% - 100%, dynamically adjust the field strength output power of the near-field communication module to 1W - 0W, and switch the baseband processor clock frequency to 48 MHz, 96 MHz, or 192 MHz according to the communication mode. This refined power consumption management method can flexibly adjust power consumption according to actual communication requirements and device status, effectively extending the device battery life and reducing energy consumption. In complex application environments, by reasonably allocating power consumption, the system can achieve the optimal power consumption configuration in different working modes, enabling the device to operate efficiently and with low power consumption in different application scenarios, adapting to different communication intensity requirements, and enhancing the device's battery life in complex environments.

[0036] VI. Human-machine interaction enhances system usability: The human-machine interaction interface design of the mode switching controller, such as the capacitive touch sensor responding to a three-finger swipe gesture to trigger mode reset, the physical button group performing a factory reset by long pressing for 5 ± 5 seconds, and the light sensor switching to the standby mode when the ambient illumination ≤ 10 lux, these user-friendly designs make the system more usable in complex application environments. For example, in scenarios such as industrial inspection and logistics warehousing, users can quickly switch modes through simple gestures and automatically enter the standby mode in low-light environments, which not only enhances the user experience but also ensures the stable operation of the system in complex environments. Through these user-friendly designs, the system can better adapt to different scenarios, provide convenience for the use of devices in complex application environments, and promote the efficient operation of the system in various scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1Schematic diagram of the connection relationship according to an embodiment of the present invention. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0040] A dual-mode short-range communication system includes a communication control unit, a mode switching controller, and an antenna assembly:

[0041] The communication control unit integrates a Bluetooth communication module and a Near Field Communication (NFC) module;

[0042] The mode switching controller is connected to the Bluetooth communication module and the near field communication module, and includes:

[0043] A signal quality analysis circuit for real-time acquisition of Bluetooth Received Signal Strength Indicator (RSSI) and NFC magnetic field strength parameters;

[0044] A dynamic priority decision maker that executes a communication mode selection algorithm based on a preset threshold matrix;

[0045] A radio frequency switching component configured to complete the switching of the dual-mode communication channel within ≤ 3 ms;

[0046] The antenna assembly includes: an omnidirectional antenna operating in the 4 GHz band; a planar coupled coil operating in the 156 MHz band.

[0047] As Figure 1 shown, the communication control unit integrates the Bluetooth and NFC modules. The signal quality analysis circuit in the mode switching controller real-time acquires the Bluetooth RSSI and NFC magnetic field strength parameters, providing a data basis for the dynamic priority decision maker. The decision maker executes the communication mode selection algorithm according to the preset threshold matrix. According to different signal quality situations, such as when the Bluetooth signal is weak and the NFC signal is strong, the NFC communication mode is selected to achieve accurate decision-making. When the communication mode is determined by the decision, the radio frequency switching component plays a role. It can complete the switching of the dual-mode communication channel within ≤ 3 ms, ensuring rapid switching of the communication mode, avoiding communication interruption or delay, and ensuring the continuity and stability of communication. In the antenna assembly, the omnidirectional antenna operating in the 4 GHz band is responsible for signal transceiver of Bluetooth communication, enabling stable communication in medium and short distances; the planar coupled coil operating in the 156 MHz band is used for signal transceiver of NFC communication, supporting short-distance and fast interaction. The two work together to meet the communication requirements in different scenarios.

[0048] The threshold matrix of the dynamic priority decision maker is configured as follows: when the Bluetooth RSSI ≤ -85 dBm and the NFC magnetic field strength ≥ 5 A / m, the NFC communication mode is activated; the Bluetooth broadcast mode is maintained during the device pairing phase; during the data transmission phase, the channel bandwidth is dynamically allocated according to the bit error rate threshold from 1×10 -4 to 1×10 -6 .

[0049] The dynamic priority decision maker presets a threshold matrix. When the real-time collected Bluetooth RSSI ≤ -85 dBm and the NFC magnetic field strength ≥ 5 A / m, it is determined that the NFC communication condition in the current environment is better, and the NFC communication mode is activated. This mechanism can accurately select the communication mode suitable for the current environment according to the signal characteristics of different communication technologies, avoiding unstable communication of a single mode in a specific environment. The Bluetooth broadcast mode is maintained during the device pairing phase to facilitate quick discovery and connection of devices; during the data transmission phase, the channel bandwidth is dynamically allocated according to the bit error rate threshold from 1×10 -4 to 1×10 -6 to ensure the data transmission quality and efficiency and adapt to different data transmission requirements.

[0050] The radio frequency switching component includes: a duplex filter bank with out-of-band rejection ≥ 40 dB in the 4 GHz band; a switching array based on PIN diodes with a conduction resistance ≤ 5 Ω. The duplex filter bank has an out-of-band rejection ≥ 40 dB in the 4 GHz band, which can effectively suppress out-of-band interference signals, ensure the purity of Bluetooth communication signals, reduce the impact of interference on communication quality, and improve communication stability. The switching array based on PIN diodes has a conduction resistance ≤ 5 Ω, with low loss and fast response characteristics, and can complete the switching of the dual-mode communication channel within ≤ 3 ms, ensuring the rapidity of communication mode switching and avoiding communication interruption or delay.

[0051] It also includes a dual-mode power management unit configured to: control the duty cycle of the Bluetooth communication module to be adjusted step by step at 1% intervals within the range of 1% - 100%; dynamically adjust the field strength output power of the near-field communication module to 1W - 0W; and switch the baseband processor clock frequency to 48MHz, 96MHz or 192MHz according to the communication mode. By controlling the duty cycle of the Bluetooth communication module to be adjusted step by step at 1% intervals within the range of 1% - 100%, the working time ratio of the Bluetooth communication module can be flexibly adjusted according to the actual communication requirements. When the communication demand is low, the duty cycle is reduced to reduce power consumption; when the communication demand is high, the duty cycle is increased to ensure communication quality, achieving a balance between power consumption and performance. Dynamically adjusting the field strength output power of the NFC module to 1W - 0W can accurately control the power output of the NFC module according to the communication distance and signal strength requirements. The power is reduced in scenarios with short distances and low signal requirements to reduce energy consumption; the power is increased when enhanced communication capabilities are needed to ensure communication reliability. Switching the baseband processor clock frequency to 48MHz, 96MHz or 192MHz according to the communication mode, different communication modes have different requirements for processing capabilities. In modes with a small data transfer volume and low real-time requirements, a lower clock frequency is used to reduce power consumption; in modes with a large data transfer volume and high real-time requirements, the clock frequency is switched to a higher one to increase the processing speed and meet the communication requirements.

[0052] The human-computer interaction interface of the mode switching controller includes: a capacitive touch sensor that triggers mode reset in response to a three-finger swipe gesture;

[0053] a physical button group that performs factory reset by long pressing for 5 ± 5 seconds; and a light sensor that switches to the standby mode when the ambient illumination ≤ 10 lux. The capacitive touch sensor triggers mode reset in response to a three-finger swipe gesture, providing a convenient and intuitive operation method for users. Users can quickly reset the communication mode through a simple gesture without complex operation steps, improving the user experience and operation efficiency. The physical button group performs factory reset by long pressing for 5 ± 5 seconds. When the device malfunctions or the user needs to reconfigure the device, the device can be quickly restored to the initial state by long pressing the physical button, ensuring the normal operation and maintainability of the device. The light sensor switches to the standby mode when the ambient illumination ≤ 10 lux, and can automatically adjust the working state of the device according to the ambient light intensity. In a low-illumination environment, the device enters the standby mode, reducing power consumption, extending the device's battery life, and avoiding unnecessary energy consumption.

[0054] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements, or modifications made based on the present invention to solve substantially the same technical problems and achieve substantially the same technical effects are all covered by the protection scope of the present invention.

Claims

1. A dual - mode short - range communication system, comprising a communication control unit, a mode - switching controller, and an antenna assembly, characterized in that: The communication control unit integrates a Bluetooth communication module and a Near - Field Communication (NFC) module; The mode - switching controller is connected to the Bluetooth communication module and the NFC module, and includes: A signal quality analysis circuit for real - time acquisition of Bluetooth Received Signal Strength Indicator (RSSI) and NFC magnetic field strength parameters; A dynamic priority decision - maker that executes a communication mode selection algorithm based on a preset threshold matrix; A radio - frequency switching component configured to complete the switching of the dual - mode communication channel within ≤ 3 ms; The antenna assembly includes: An omnidirectional antenna operating in the 2.4 GHz frequency band; A planar coupling coil operating in the 13.56 MHz frequency band.

2. The dual-mode short-range communication system according to claim 1, wherein: The threshold matrix of the dynamic priority decision - maker is configured as: When the Bluetooth RSSI ≤ - 85 dBm and the NFC magnetic field strength ≥ 1.5 A / m, activate the NFC communication mode; Maintain the Bluetooth broadcast mode during the device pairing phase; During the data transmission phase, the channel bandwidth is dynamically allocated according to the bit error rate threshold from 1×10 -4 to 1×10 -6 .

3. The dual-mode short-range communication system according to claim 1, characterized in that: The radio - frequency switching component includes: A duplex filter bank with out - of - band rejection ≥ 40 dB in the 2.4 GHz frequency band; A switching array based on PIN diodes with a conduction resistance ≤ 0.5 Ω.

4. The dual-mode short-range communication system according to claim 1, wherein: It further includes a dual - mode power consumption management unit configured to: Control the duty cycle of the Bluetooth communication module to be adjusted in a range of 1% - 100% with a 1% step; Dynamically adjust the field strength output power of the NFC module to 0.1 W - 2.0 W; According to the communication mode, switch the baseband processor clock frequency to 48 MHz, 96 MHz, or 192 MHz.

5. The dual-mode short-range communication system according to claim 1, wherein: The mode - switching controller further includes a human - machine interaction interface, and the human - machine interaction interface includes: A capacitive touch sensor that triggers mode reset in response to a three - finger swipe gesture; A physical button group that performs factory reset by long - pressing for 5 ± 0.5 seconds; A light sensor that switches to the standby mode when the ambient illuminance ≤ 10 lux.

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