Visible light communication transmitting and receiving device for 6G infrastructure and transmitting and receiving device control method

Abstract

The invention is applied to the technical field of communication equipment, and particularly provides a visible light communication transceiving device for 6G capital construction and a transceiving device control method, and the visible light communication transceiving device comprises a photoelectric cooperative transceiving module, a dual-channel signal processing chip, an environment adaptive adjustment unit, a Mesh ad hoc network chip, a standby radio frequency channel and an edge computing chip. Through modularization integration of a photoelectric cooperative transmit-receive module, a dual-channel signal processing chip, an environment adaptive adjustment unit, a Mesh ad hoc network chip, a standby radio frequency channel and an edge calculation chip, the device can still maintain a stable link under the conditions of strong light, shielding and electromagnetic interference. And when the quality is degraded, switching to a standby radio frequency channel is carried out in a millisecond-level time delay manner, so that the continuous coverage of a 6G infrastructure scene and the reliability of key services are ensured, and the problems that a communication link is easily blocked and interrupted and the multi-node cooperative capability is lacked during large-scale node access are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication devices, and in particular to a visible light communication transceiving device and a transceiving device control method for 6G infrastructure. BACKGROUND

[0002] With the continuous evolution of mobile communication technology, 6G is gradually becoming the focus of attention of countries and industries around the world. Compared with 5G, 6G network will provide support in higher frequency bands, larger bandwidths and lower latencies to meet the diversified application requirements of smart transportation, industrial Internet, urban core high-density scenarios, etc. At the same time, 6G infrastructure puts forward higher requirements in terms of blind area coverage, key business communication stability and energy efficiency management.

[0003] The existing visible light communication transceiving device usually uses a single LED light source as the transmitting end and cooperates with a photodetector as the receiving end to realize point-to-point data transmission. This kind of device can achieve high-speed transmission of hundreds of Mbps to several Gbps in indoor environments, and has the advantages of not being affected by electromagnetic interference and rich spectrum resources. In some research and applications, combined with simple adaptive modulation and power control technology, it can also improve the problem of light intensity fluctuation and environmental light interference to a certain extent, thereby ensuring basic communication stability.

[0004] Although the traditional visible light communication transceiving device combined with LED light source and photodetector can achieve high data rate and low interference transmission effect, in complex environments such as outdoor transportation infrastructure, large-scale node access in industrial parks or urban core areas, there are still problems of communication link being easily interrupted by shielding and lack of multi-node collaboration capability. SUMMARY

[0005] Embodiments of the present application provide a visible light communication transceiving device and a transceiving device control method for 6G infrastructure The visible light communication transceiving device and the transceiving device control method for 6G infrastructure can improve the problem of communication link being easily interrupted by shielding and lack of multi-node collaboration capability when large-scale node access.

[0006] Other characteristics and advantages of the present application will become apparent from the following detailed description, or will be learned by practice of the present application.

[0007] According to an aspect of some embodiments of the present application, a visible light communication transceiver device for 6G infrastructure is provided, which comprises: a photoelectric cooperative transceiver module for data transmission of 6G infrastructure; a dual-channel signal processing chip for parallel demodulation and error rate correction of data; an environment adaptive adjustment unit for real-time monitoring of ambient light intensity, dynamic obstacles and electromagnetic interference, and adjusting the transmission power, modulation mode and filtering parameters of the photoelectric cooperative transceiver module based on the monitoring results; a Mesh self-organizing network chip for realizing multi-node dynamic networking through light signal strength ranging and topology optimization algorithm in the 6G infrastructure scene; a backup radio frequency channel for automatically switching to Sub-6GHz frequency communication when the visible light link quality is lower than a preset threshold; an edge computing chip for collecting and analyzing device operating parameters and uploading the operating parameters to an operation and maintenance platform through a 6G backhaul link.

[0008] In some embodiments of the present application, the photoelectric cooperative transceiver module based on the foregoing scheme comprises a transmitting end, a receiving end, a 6G radio frequency auxiliary module and a clock synchronization unit, the transmitting end comprises a gallium nitride-based LED array and a microlens array for realizing dynamic regulation of beam angle; the receiving end comprises an avalanche photodiode and a silicon-based photodetector array; the 6G radio frequency auxiliary module is used to realize seamless switching of optical signals and electrical signals in cooperation with the clock synchronization unit.

[0009] In some embodiments of the present application, the environment adaptive adjustment unit based on the foregoing scheme comprises a multi-spectral sensor and an adjustment module, the multi-spectral sensor is used to monitor the ambient light intensity, dynamic obstacles and electromagnetic interference in real time at a preset sampling frequency; the adjustment module is used to adjust the transmission power and modulation mode of the gallium nitride-based LED array and the optical filter parameters of the microlens array according to the monitoring results.

[0010] In some embodiments of the present application, the visible light communication transceiver device based on the foregoing scheme further comprises a magnetic universal interface, a telescopic support and a shell, the magnetic universal interface and the telescopic support are used to connect with the 6G infrastructure, and the shell is used to isolate the visible light communication transceiver device from the external environment.

[0011] In some embodiments of the present application, the shell is provided with a temperature control module, which is used to adjust the working environment temperature of the visible light communication transceiver device.

[0012] According to another aspect of the embodiments of the present application, a method for controlling a visible light communication transceiver device for 6G infrastructure is provided, which is applied to the visible light communication transceiver device for 6G infrastructure in any of the above embodiments, and includes: collecting, by the environment self-adaptive adjustment unit, ambient light intensity, shelter dynamic, and electromagnetic interference to construct a collection data set; performing threshold analysis on the collection data set, and if the collection data set has data exceeding a preset threshold, performing type determination on the collection data set to obtain a determination result; and adjusting the optoelectronic cooperative transceiving module based on the determination result to obtain an adjusted visible light communication transceiver device.

[0013] In some embodiments of the present application, the method based on the foregoing scheme further includes: when the adjusted visible light communication transceiver device cannot meet the communication coverage requirement, obtaining a light signal strength ranging result of the adjusted visible light communication transceiver device; and inputting the light signal strength ranging result into the Mesh self-organizing network chip to establish a multi-hop relay link with other adjacent visible light communication transceiver devices.

[0014] In some embodiments of the present application, the method based on the foregoing scheme further includes: when the adjusted visible light communication transceiver device cannot meet the communication quality requirement, obtaining a visible light communication link quality of the adjusted visible light communication transceiver device; and when the visible light communication link quality is lower than a preset threshold, activating the standby radio frequency channel and realizing seamless data switching through the optoelectronic cooperative transceiving module.

[0015] In some embodiments of the present application, the step of performing threshold analysis on the collection data set, and if the collection data set has data exceeding a preset threshold, performing type determination on the collection data set to obtain a determination result based on the foregoing scheme includes: comparing ambient light intensity data in the collection data set with a preset light intensity threshold range, and when the ambient light intensity data exceeds the light intensity threshold range, determining it as a strong light interference type; comparing shelter dynamic data in the collection data set with a preset shelter rate threshold, and when the shelter dynamic data exceeds the shelter rate threshold, determining a shelter as a static shelter type or a dynamic shelter type through infrared imaging recognition technology; comparing electromagnetic interference data in the collection data set with a preset interference intensity threshold, and when the electromagnetic interference data exceeds the interference intensity threshold, determining it as a narrowband interference type or a wideband interference type according to interference spectrum characteristics; and taking the strong light interference type, the static shelter type, the dynamic shelter type, the narrowband interference type, or the wideband interference type as the determination result.

[0016] In some embodiments of the present application, based on the foregoing scheme, the step of adjusting the optoelectronic cooperative transceiver module based on the determination result to obtain an adjusted visible light communication transceiver device comprises: inputting the determination result into the dual-channel signal processing chip to generate a control instruction, and sending the control instruction to the environment adaptive adjustment unit; According to the determination result, the environment adaptive adjustment unit implements a corresponding adjustment strategy, and the optoelectronic cooperative transceiver module works synchronously to obtain an adjusted visible light communication transceiver device, wherein the adjustment strategy comprises: when a control instruction of strong light interference type is received, the optoelectronic cooperative transceiver module is adjusted from a current power value to a low power range of 5-20W; when a control instruction of narrowband interference type is received, the modulation mode is switched from the current modulation mode to 16QAM or OFDM modulation mode; when a control instruction of wideband interference type is received, the working state of the optoelectronic cooperative transceiver module is maintained and the standby radio frequency channel is activated synchronously; when a control instruction of static shielding type is received, the optoelectronic cooperative transceiver module is driven by a preset stepping motor to adjust the light beam coverage angle to an optimal angle that bypasses the shielding object; and when a control instruction of dynamic shielding type is received, a preset servo control system is started to drive the optoelectronic cooperative transceiver module to continuously adjust the angle tracking.

[0017] Compared with the prior art, the present application has the following beneficial effects: link stability and cooperative coverage. By modularly integrating the optoelectronic cooperative transceiver module, the dual-channel signal processing chip, the environment adaptive adjustment unit, the Mesh self-organizing network chip, the standby radio frequency channel and the edge computing chip, the device can still maintain a stable link under strong light, shielding and electromagnetic interference conditions, and can switch to the standby radio frequency channel with millisecond-level time delay when the quality degrades, thereby guaranteeing the continuous coverage and key business reliability of the 6G infrastructure scene and improving the problems of communication link interruption and lack of multi-node cooperative capability in large-scale node access. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic block diagram of an embodiment of a visible light communication transceiver device for 6G infrastructure provided by the embodiment of the present application; Figure 2 is a structural schematic block diagram of an optoelectronic cooperative transceiver module provided by the embodiment of the present application; Figure 3 is a structural schematic block diagram of an environment adaptive adjustment unit provided by the embodiment of the present application; Figure 4 is a structural schematic block diagram of another embodiment of a visible light communication transceiver device for 6G infrastructure provided by the embodiment of the present application; Figure 5is a structural schematic block diagram of a shell provided by an embodiment of the present application. Figure 6 is a flowchart of a visible light communication transceiver device control method for 6G infrastructure provided by an embodiment of the present application.

[0019] Reference signs: 10, visible light communication transceiver device for 6G infrastructure; 11, photoelectric cooperative transceiver module; 111, transmitting end; 1111, gallium nitride-based LED array; 1112, microlens array; 112, receiving end; 1121, avalanche photodiode, 1122, silicon-based photodetector array; 113, 6G radio frequency auxiliary module; 114, clock synchronization unit; 12, dual-channel signal processing chip; 13, environment self-adaptive adjustment unit; 131, multi-spectral sensor; 132, adjustment module; 14, Mesh self-organizing network chip; 15, backup radio frequency channel; 16, edge computing chip; 17, magnetic universal interface; 18, telescopic support; 19, shell; 191, temperature control module. DETAILED DESCRIPTION

[0020] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the inventive concept to those skilled in the art.

[0021] In addition, the features, structures, or characteristics described in this application can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are recited in order to provide a thorough understanding of embodiments of the present application. One skilled in the relevant art, however, will recognize that embodiments of the present application can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth.

[0022] The block diagrams shown in the drawings are merely functional entities, and do not necessarily have to correspond to physically independent entities. That is, these functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0023] The flowcharts shown in the drawings are merely exemplary illustrations, and do not necessarily include all contents and operations / steps, nor do they necessarily have to be executed in the order described. For example, some operations / steps can be further divided, and some operations / steps can be combined or partially combined, so the actual execution order can be changed according to the actual situation.

[0024] It should be noted that "multiple" referred to in this paper refers to two or more than two. The association relationship of the associated object is described by "and / or", which means that there can be three relationships, for example, A and / or B can represent three cases: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents that the associated objects before and after it are in an "or" relationship.

[0025] The technical solutions of the present application will be further illustrated by specific embodiments in conjunction with the accompanying drawings.

[0026] As Figures 1 to 5 shown, in this embodiment, a visible light communication transceiver device 10 for 6G infrastructure is provided, which can realize large bandwidth, low latency and high reliability access and backhaul in high-density scenarios such as smart traffic, industrial parks and urban core areas. The visible light communication transceiver device 10 for 6G infrastructure includes a photoelectric cooperative transceiver module 11, a dual-channel signal processing chip 12, an environment adaptive adjustment unit 13, a Mesh self-organizing network chip 14, a backup radio frequency channel 15 and an edge computing chip 16.

[0027] The photoelectric cooperative transceiver module 11 is used to complete data transmission and reception of the visible light link with a gallium nitride-based LED array 1111 as the transmitting end 111, and an avalanche photodiode 1121 and a silicon-based photodetector array 1122 as the receiving end 112; The module is integrated with a 6G radio frequency auxiliary module 113, and a clock synchronization unit 114 is used to unify the clock source to support high-speed seamless switching (clock jitter ≤ 10ps) of optical-electrical signals. The transmitting end 111 cooperates with the microlens array 1112 to realize dynamic regulation and control of the beam angle in the range of 0-120°; After the front-end transimpedance amplification, automatic gain control and analog-to-digital conversion, the signal is sent to the dual-channel signal processing chip 12 to complete parallel demodulation and error rate correction, supporting adaptive rate of 10-100Gbps.

[0028] The transmitting end 111 adopts a gallium nitride-based LED array 1111 with a light-emitting wavelength of 450-650nm, and the single array rated power is 5-50W and can be continuously adjustable; The microlens array 1112 adopts a polymer aspheric microlens, the unit aperture is 1.0-1.5mm, and the step angle resolution is 0.1°; The receiving end 112 adopts an APD with a peak responsivity ≥ 0.5A / W, and a signal-to-noise improvement type silicon-based photodetector array 1122 is configured in parallel, and the equivalent input noise current ≤ ; The sampling rate of the analog-to-digital converter is ≥ 2.5GS / s, and the resolution is ≥ 10bit.

[0029] Specifically, the photoelectric cooperative transceiver module 11 includes a transmitting end 111, a receiving end 112, a 6G radio frequency auxiliary module 113, and a clock synchronization unit 114. The transmitting end 111 includes a gallium nitride-based LED array 1111 and a microlens array 1112, which are used to realize dynamic regulation of the beam angle.

[0030] The transmitting drive adopts a constant current source + pulse width / amplitude dual modulation structure, supports OOK, OFDM, 16QAM, and other modulation systems; the microlens array 1112 is driven by a two-axis micro servo actuator, and the angle setting is closed-loop adjusted by the controller with a step size of 0.1°.

[0031] The transmitting drive board adopts a two-stage constant current structure (coarse adjustment + fine adjustment), with a coarse adjustment resolution of 500 mA steps and a fine adjustment resolution of 50 mA steps; the beam forming optical path includes a collimating sheet and a microlens array 1112, with a transmittance of ≥92% and a sidelobe suppression ratio of ≥18 dB; the angle control loop adopts a combination of a position encoder (resolution ≥12 bits) and a PI controller, with a closed-loop setting time of ≤5 ms.

[0032] The beam pointing optimization adopts the existing algorithm combination of "maximum received signal strength search + extended Kalman filter (EKF)": first, the initial optimal direction is obtained by equal-angle step scanning, then the intensity sequence of adjacent steps is estimated and the angle is fine-tuned by EKF, and finally the target direction is converged within ≤10 ms.

[0033] The receiving end 112 includes an avalanche photodiode 1121 and a silicon-based photodetector array 1122, which are used to detect and convert visible light signals in 6G infrastructure scenarios to realize adaptive high-speed demodulation.

[0034] The receiving front end is configured with a switchable bandwidth transimpedance amplifier (TIA), a low-bandwidth mode for strong signal scenarios to reduce thermal noise, and a high-bandwidth mode for high-speed scenarios to ensure symbol fidelity; automatic gain control (AGC) digitally sets the gain with a step size of 1 dB; the front end is followed by an anti-aliasing filter (with a cutoff frequency configured at 1.2 times the symbol rate) and a high-linearity ADC; the digital front end adopts a pre-equalization ( FF E) and decision feedback equalization (DFE) cascade structure to suppress ISI; then enters the dual-channel signal processing chip 12 to complete parallel demodulation and FEC error correction.

[0035] The two parallel channels of the dual-channel signal processing chip 12 are respectively a "high-speed data channel" and a "control / pilot channel". The high-speed data channel completes time domain synchronization, frequency domain equalization and 16QAM / OFDM demodulation, and uses LDPC (quasi-cyclic structure, code rate 1 / 2, 2 / 3 switchable) for error rate correction; the control / pilot channel carries pilot sequences and link control instructions, and is used for real-time estimation of channel response and feedback of power and angle adjustment amount of the transmitting end 111. The parameters are exchanged between the two channels through a shared channel estimation buffer, and the link state is refreshed at a period of 100 μs.

[0036] The 6G radio frequency auxiliary module 113 is compatible with the millimeter wave / terahertz frequency band, and is used in cooperation with the clock synchronization unit 114 to realize seamless switching of optical signals and electrical signals.

[0037] The 6G radio frequency auxiliary module 113 includes a millimeter wave front end (such as 28 / 39 GHz optional) and an extensible terahertz front end radio frequency link, and the baseband and the visible light link share a unified time reference; the clock synchronization unit 114 uses a temperature compensated crystal oscillator (TCXO) and a phase-locked loop (PLL) in cascade to achieve a system synchronization accuracy of 10 ps; the link quality threshold is set to be that the error rate is greater than 10-5 or the SNR is less than 10 dB for 20 ms, which triggers the switching; the switching uses a "pre-buffering + parallel code sending" strategy to ensure that the switching time is less than or equal to 1 ms and there is no packet loss.

[0038] In order to reduce the switching jitter, the device uses a hysteresis mechanism near the trigger threshold: when the SNR rises to 12 dB and lasts for 20 ms, the radio frequency channel is removed, avoiding frequent oscillation.

[0039] Specifically, the environment adaptive adjustment unit 13 includes a multi-spectral sensor 131 and an adjustment module 132, and the multi-spectral sensor 131 is used to monitor the ambient light intensity, the dynamic of the shelter and the electromagnetic interference in real time at a preset sampling frequency.

[0040] The multi-spectral sensor 131 collects light intensity in the range of 0-100000 lux at a sampling frequency of 1 kHz; the shelter detection channel uses a dual mechanism of infrared imaging + spot deformation analysis: the infrared channel identifies the profile of the shelter, and the spot channel measures the degree of shielding (the shielding rate threshold is set to 20%) by receiving the symmetry of the array surface distribution; the electromagnetic interference monitoring channel analyzes the noise spectrum of the front-end power supply and signal ground in real time FF T analysis, and distinguishes between narrowband and wideband interference. The adjustment module 132 works according to the process of "threshold determination-strategy mapping-parameter issuance".

[0041] ​Threshold decision employs random forest classifier (existing machine learning algorithm) to classify feature vectors such as "light intensity, occlusion rate, noise spectrum peak / bandwidth"; strategy mapping table corresponds each action such as "strong light interference → narrowband filtering", "dynamic occlusion → beam tracking", "wideband electromagnetic interference → maintain optical link and activate standby radio channel 15 in parallel"; parameter delivery updates every 100μs cycle to ensure overall response time ≤10ms.

[0042] And the adjustment module 132 is used for adjusting the emission power and modulation mode of the gallium nitride-based LED array 1111 and the optical filter parameter of the microlens array 1112 according to the monitoring result, enabling narrowband filtering in a strong light interference scenario, triggering a beam tracking algorithm in an occlusion scenario, and responding with a delay of no more than 10ms, so as to guarantee the stability of the communication link.

[0043] Power control is fine-grained adjusted in steps of 50mA; modulation mode can be switched between OOK and 16QAM-OFDM; optical filter parameter sets center wavelength and bandwidth (center wavelength aligns with emission spectrum, half-width can be switched within 10-30nm) through electrically adjustable bandpass filter; beam tracking adopts a closed-loop structure of "prediction (EKF) + execution (two-axis servo) + correction (pilot feedback)", and the response is ≤5ms when the single angle correction is less than 2°, and the large angle correction is no more than 10ms.

[0044] After strong light interference is determined, the half-width of the optical filter is narrowed from 30nm to 10nm, and the emission power is lowered to the interval of 5-20W to avoid saturation; after dynamic occlusion is determined, the beam pointing is continuously tracked within ±15°, the tracking step is 0.5°, the estimation-execution-correction cycle is 1ms per step, and the common clock ensures end-to-end synchronization.

[0045] Further, the visible light communication transceiver device further comprises a magnetic general interface 17, a telescopic support 18, and an outer shell 19, the magnetic general interface 17 and the telescopic support 18 are used for connecting with the 6G infrastructure, and the outer shell 19 is used for isolating the visible light communication transceiver device from the external environment.

[0046] The magnetic general interface 17 adopts an N52 grade permanent magnet module and a mechanical quick buckle double insurance structure, and the single point adsorption force is ≥150N; the telescopic support 18 has a stroke of 200-600mm, and the pitch / azimuth dual-dimensional adjustment range is ±45° respectively; the mounting surface is provided with standardized hole positions (such as a diameter of 12mm array), which can be quickly connected on the tower, street lamp pole, building facade and traffic signal lamp arm support, and the single station installation time is ≤15 minutes. The outer shell 19 meets the IP68 protection level, the material is an ultraviolet resistant PC+aluminum alloy mixed structure, the window adopts an anti-reflection coated quartz glass, and the transmittance is ≥95%.

[0047] When deployed at outdoor intersections, the device is fixed to the streetlight pole by an arc-shaped clamp, and the magnetic interface is used for tool-free disassembly and assembly of the module, with maintenance and replacement time ≤5 minutes. The edge of the shell 19 is provided with a pressure relief valve and an anti-condensation coating to ensure that the window remains clean and the interior remains dry under rain, snow, and diurnal temperature conditions.

[0048] As shown in Figures 1 to 5 The temperature control module 191 is built into the shell 19 and is used to adjust the operating environment temperature of the visible light communication transceiver device.

[0049] The temperature control module 191 is composed of a thermoelectric cooling plate (TEC), a micro air duct, and a temperature sensor. The controller maintains the cavity temperature in the range of 0-50°C using a PID algorithm. When the external environment changes from -40 to +70°C, the temperature control module adjusts the power and air duct speed according to the dual threshold linkage of cavity temperature and device junction temperature, ensuring that the LED junction temperature and APD operating temperature are within the reliable range.

[0050] When the external temperature is +55°C, the system sets the TEC to 80% of the maximum power, and the fan speed is increased to 5000 rpm. The cavity temperature drops from 62°C to 45°C within 5 minutes. When the external temperature is -20°C, the system switches to heating mode, maintaining the cavity temperature at 10-20°C with a power of 15W, ensuring reliable device startup.

[0051] In this embodiment, by modularly integrating the photoelectric cooperative transceiving module 11, the dual-channel signal processing chip 12, the environment adaptive adjustment unit 13, the Mesh self-organizing network chip 14, the backup radio frequency channel 15 and the edge computing chip 16, the device realizes the closed-loop control of “perception—judgment—adjustment” at the link layer: the multi-spectral sensor 131 collects the light intensity, shielding and electromagnetic interference at a frequency of 1 kHz; the adjustment module 132 outputs the strategy based on threshold analysis and random forest classification, so that the transmission power, modulation system, filter bandwidth and beam angle are updated within ≤10 ms, ensuring that the link can still maintain stability under strong light and shielding conditions. At the network level, the Mesh self-organizing network chip 14 establishes multi-hop relays according to the light signal intensity ranging and topology optimization results, and the relay delay of the blind area compensation is ≤50 μs, ensuring continuous coverage in complex scenarios; when the link quality further decreases below the threshold, the backup radio frequency channel 15 completes seamless switching within ≤1 ms under the cooperation of a unified clock and pre-buffering, with zero packet loss for critical services. At the operation and maintenance level, the edge computing chip 16 analyzes the operating parameters such as temperature, power consumption and signal strength locally and uploads them through the 6G backhaul link, supporting remote parameter configuration and fault warning; in cooperation with the IP68 shell 19 and the temperature control module 191, the device can operate stably in the environment of -40°C to +70°C for a long time. With the above cooperative mechanism, this embodiment can significantly reduce the delay, improve the availability and reduce the spectrum pressure compared with the pure radio frequency scheme in the intelligent transportation V2I, high-density access in industrial parks and large-bandwidth services in urban core areas, thereby meeting the system requirements of 6G infrastructure for continuous coverage, high reliability and easy deployment.

[0052] As shown in Figure 6 The application also provides a visible light communication transceiving device control method for 6G infrastructure, which is applied to the above-mentioned visible light communication transceiving device 10 for 6G infrastructure, and includes the following steps S100 to S300.

[0053] Step S100, collect ambient light intensity, shielding dynamic and electromagnetic interference through the environment adaptive adjustment unit 13 to construct a collection data set.

[0054] In the environment adaptive adjustment unit 13, the ambient light intensity (unit: lux), the shielding dynamic (unit: shielding rate % and motion speed m / s) and the electromagnetic interference (unit: spectral peak amplitude and bandwidth) are synchronously collected by the multi-spectral sensor 131 at a sampling frequency of 1 kHz, and a collection data set containing a time stamp is formed.

[0055] Ambient light intensity collection: the visible light channel covers 400-750 nm, and the ADC quantization is ≥10 bit. The original illumination sequence is subjected to 3-point median filtering to suppress transient pulsation, and the light intensity sample I lux ∈[0,100000] is obtained and stored in the database.

[0056] Occlusion dynamic acquisition: the infrared imaging submodule acquires a frame sequence at ≥100 fps, and uses background subtraction + connected domain contour extraction to obtain the occlusion area A o ; the effective spot area A spot of the receiving end 112 is obtained o The occlusion rate η = A spot × 100% is calculated. The Lucas-Kanade optical flow is used to calculate the inter-frame displacement of the occlusion contour centroid, which is converted into a motion speed v (m / s), and η and v are stored in the database.

[0057] Electromagnetic interference acquisition: the front-end interference monitoring channel performs 1024-point FF T, with an update period of 5 ms; the spectral peak amplitude P k (dBμV) and the equivalent bandwidth B E (MHz) are recorded and stored in the database.

[0058] Acquisition data set structure: {t, I lux , η, v, P k , B E} is stored in a ring buffer with a window length ≥1s (1000 samples), providing a continuous data basis for subsequent threshold analysis.

[0059] When the intersection scene is running under strong sunlight at noon, the multispectral sensor 131 acquires the maximum value I lux，max =92,000lux, the average value I lux,avg =81,500lux; the peak value of the occlusion rate η max =28%, the motion speed v=0.9m / s caused by the dynamic occlusion of the pedestrian passing through; the electromagnetic interference introduced by the adjacent power supply equipment is measured as P k =86dBμV, B E =12MHz. All quantified values are written into the acquisition data set according to the timestamp for subsequent calculation and calling.

[0060] Step S200, threshold analysis is performed on the acquisition data set, and if the acquisition data set has data exceeding the preset threshold, type determination is performed on the acquisition data set to obtain a determination result.

[0061] The controller calls the threshold library to perform item-by-item determination on the environmental light intensity, occlusion dynamics, and electromagnetic interference, and outputs the determination result (strong light interference / static occlusion / dynamic occlusion / narrowband electromagnetic interference / wideband electromagnetic interference).

[0062] Environmental light intensity threshold: set the upper threshold I T =80,000lux; when Ilux,avg I T or I lux , max >90,000lux is determined as strong light interference (used to trigger narrowband filtering and power backoff). The threshold interval is consistent with the monitoring range, which is 0-100000 lux.

[0063] Dynamic threshold of occlusion: set the occlusion rate threshold η T =20%, and the speed threshold v T =0.2m / s. η≥η T and v<v T → static occlusion; η≥η T and v≥v T → dynamic occlusion.

[0064] Threshold of electromagnetic interference: set the amplitude threshold P T =80dBμV. When P k ≥P T : if B E ≤20MHz→ narrowband electromagnetic interference; if B E >20MHz→ wideband electromagnetic interference.

[0065] Conflict resolution: when multiple types of thresholds are triggered at the same time, the single determination result is generated in the order of priority of "strong light interference→ dynamic occlusion→ electromagnetic interference", ensuring the uniqueness of the execution strategy.

[0066] Implementation means: threshold comparison and determination are executed on the microcontroller with a timing interrupt (period 1ms); at the same time, a random forest classifier (existing machine learning algorithm) is provided to check the consistency of the [I lux,avg , I lux , max , η, v, P k , B E ] vector, avoiding frequent switching caused by boundary jitter (hysteresis: restore threshold to float by 10%).

[0067] Take the collected data set of step S100: I lux,avg =81,500lux>I T , first determine as strong light interference; even if η=28% and v=0.9m / s (satisfy dynamic occlusion conditions) exist at the same time, the single determination result is output as strong light interference due to the priority strategy; if another period I lux,avg =60,000lux, η=25%, v=0.8m / s, and P k =86dBμV, B E =12MHz, then the determination result is output as dynamic occlusion (priority higher than narrowband electromagnetic interference).

[0068] Step S300, adjusting the optoelectronic cooperative transceiver module 11 based on the determination result to obtain an adjusted visible light communication transceiver device.

[0069] In the optoelectronic cooperative transceiver module 11, the determination result is written into an adjustment register, and the adjustment module 132 performs closed-loop adjustment on the gallium nitride-based LED array 1111, the modulation system, and the microlens array 1112 according to the determination result to form the working parameters of the adjusted visible light communication transceiver device. Strong light interference → start narrowband filtering and power backoff: narrow the half-width of the electrically tunable bandpass filter from 30 nm to 10-15 nm; reduce the emission power of the gallium nitride-based LED array 1111 from the range of 5-50 W to the interval of 5-20 W; if necessary, switch from OOK to 16QAM-OFDM to improve spectral efficiency and noise immunity (both are existing modulation methods). Response time ≤10 ms.

[0070] Static / dynamic occlusion → beam tracking: two-axis servo of the microlens is adjusted in steps of 0.1°; the control law uses extended Kalman filter (EKF, existing algorithm) + PI servo, and the angle is corrected according to the pilot strength maximization principle; the angle correction frequency under dynamic occlusion is ≥1 kHz, and the overall response is ≤10 ms.

[0071] Narrowband / wideband electromagnetic interference → maintain the optical link and evaluate the backoff: narrowband interference maintains the current power and only narrows the filter; wideband interference triggers power fine-tuning and modulation switching, and at the same time, sets the "link quality monitoring flag"; if the bit error rate > 1.0×10

[0072] Parameter delivery: power is updated in steps of 50 mA, and angle is updated in steps of 0.1°; the two adjustments and pilot measurement form a closed loop with a period of 100 μs until the bit error rate and SNR return to the target interval.

[0073] When the determination result = strong light interference, the adjustment module 132 narrows the filter half-width from 30 nm to 12 nm, reduces the gallium nitride-based LED array 1111 power from 40 W to 18 W, and switches the modulation method from OOK to 16QAM-OFDM; then the received SNR is increased from 9 dB to 14 dB, and the bit error rate is reduced from 2.5×10 -6 to 6.0×10 -7 , which meets the link target. If the determination result = dynamic occlusion, the microlens array 1112 performs continuous tracking in the range of ±12° with a step of 0.5°, converges to the new pointing direction within 3 ms, and the pilot power is restored to more than 95% of the pre-attenuation, maintaining stable communication.

[0074] In this embodiment, by synchronously sampling, thresholding, analyzing and classifying the ambient light intensity, dynamic occlusion and electromagnetic interference, the complex external environment is mapped to a clear decision result, and the power / modulation of the gallium nitride-based LED array 1111 and the pointing of the microlens array 1112 are adjusted by the adjustment module 132 to implement millisecond-level closed-loop control, thereby constructing a "perception-analysis-execution" control chain of the transceiver device.

[0075] Specifically, a 1 kHz granularity data set is provided, covering an ambient light intensity range of 0-100000 lux, dynamic occlusion characterized by occlusion rate and speed, and electromagnetic interference characterized by spectral peak and bandwidth; clear preset thresholds and conflict resolution order are used to stably output decision results such as strong light interference, static occlusion, dynamic occlusion, narrowband or broadband electromagnetic interference; narrowband filtering, power backoff, modulation switching and beam tracking are performed accordingly, so that the bit error rate and SNR are pulled back to the target range within ≤10 ms, and the link availability is ensured. The capability indicators of this process and device are consistent: the sensing sampling frequency, power and modulation adjustable range, angle step and response time are matched with the device specifications, ensuring the integration of hardware and software. Further combined with the standby radio frequency channel 15 and 6G radio frequency auxiliary module 113 of the device, when the optical link quality continuously deteriorates and the bit error rate exceeds the threshold, the device can seamlessly switch to a Sub-6GHz link within ≤1 ms according to the device redundancy strategy, realizing the continuity of critical services. In summary, in the complex field of 6G infrastructure construction, this embodiment realizes rapid adaptation to strong light, occlusion and interference and stable transmission, significantly improving coverage continuity and service reliability.

[0076] Further, the visible light communication transceiver device control method further comprises: When the adjusted visible light communication transceiver device cannot meet the communication coverage requirement, the light signal intensity ranging result of the adjusted visible light communication transceiver device is obtained.

[0077] After the adjustment is completed, the light signal intensity ranging sub-process in the "ranging-link establishment" process is started to perform visible light ranging on the adjacent node and form a light signal intensity ranging result.

[0078] Ranging signal design: the gallium nitride-based LED array 1111 transmits a ranging pilot frame (length 1 ms, containing a Barker code + pilot block + node ID) at a fixed reference power P t and the current beam pointing (set by the microlens array 1112).

[0079] Reception and intensity estimation: the receiving end 112 of the adjacent device measures the received optical power P r(Units: μW) and pilot SNR (dB), and the angle of arrival α (accuracy ≤0.5°) is estimated by the spatial response of the photoelectric array.

[0080] Distance backstepping and calibration: The present embodiment adopts a ranging method based on received power (RSSI type) + angle correction. The system has a calibration table T(θ, P t ) related to beam half-angle, lens setting, and window transmittance offline. Online, the measured (P r , α) is matched with T to obtain the estimated distance d e (m). To improve robustness, the mean value △d e is taken for 10 measurements excluding the extreme values.

[0081] Result organization: Write {neighbor ID, △d e , △P r , △SNR, α} to the light signal strength ranging result, and add a time stamp and a valid flag (if the pilot loss rate >20%, mark it as invalid). The estimated total duration is ≤5ms.

[0082] In a certain intersection scenario, node A is an adjusted visible light communication transceiver, which transmits 10 ranging pilot frames with P t =10W and beam pointing θ=8°; nodes B, C, and D receive: B: △P r =12.5μW, △SNR=21dB, α=1.2°→ calibration table backstepping △d e =28.4m; C: △P r =6.8μW, △SNR=17dB, α=3.5°→△d e =39.6m; D: △P r =3.3μW, △SNR=12dB, α=6.1°→△d e =52.1m.

[0083] All of them meet the "valid flag" and form the light signal strength ranging result table of A to {B, C, D}.

[0084] Input the light signal strength ranging result into the Mesh self-organizing network chip 14 to establish multi-hop relay links with other nearby visible light communication transceivers.

[0085] The controller merges the light signal strength ranging result of node A with similar results obtained from neighbor nodes broadcast to form an "adjacency graph", and submits it to the Mesh self-organizing network chip 14 to perform topology optimization and route selection, establishing multi-hop relay links that meet the delay and reliability requirements.

[0086] Adjacency graph construction: with nodes as vertices, and "directly visible light reachable" as edges, edge weight adopts link cost function: ; where SNR i,j is pilot SNR, d i,j is from light signal strength ranging result, BLER i,j is block error rate estimation, w1, w2, w3 are normalization weights (for example, 0.5 / 0.3 / 0.2).

[0087] Topology optimization and routing: the Mesh self-organizing network chip 14 runs Dijkstra (shortest path algorithm) or K alternative path set based on minimum spanning tree, and selects the main path according to the principle of minimum cost function, and takes "maximum hop number H max " and "end-to-end target relay delay ≤ 50 μs" as constraints. The single-hop queue and processing overhead is limited to ≤ 10 μs.

[0088] Time slot and forwarding: TDMA frame structure is adopted, frame length is 100 μs, including protection interval 2 μs; consecutive time slots are allocated for each relay link to ensure conflict-free forwarding.

[0089] Link establishment and maintenance: after establishing a multi-hop relay link, short pilot is periodically (10 ms) updated to update SNR and BLER, and if the cost exceeds the threshold, seamless rerouting (reserved standby time slot) is triggered.

[0090] The goal is to forward the data of node A to the intersection edge aggregation node G. Based on the light signal strength ranging result of A to {B, C, D} and the report of each neighbor, the Mesh self-organizing network chip 14 generates an adjacency graph and calculates three candidate paths: Path 1: A→B→G, cost C=0.42, total hop number 2, estimated end-to-end relay delay = 2×9 μs = 18 μs; Path 2: A→C→G, cost C=0.55, end-to-end delay = 2×11 μs = 22 μs; Path 3: A→D→C→G, cost C=0.71, end-to-end delay = 3×10 μs = 30 μs.

[0091] The system selects the path with the minimum cost, path 1, and allocates {time slot #3, time slot #4} as two-hop consecutive forwarding time slots in the TDMA frame; then, the path cost is monitored at a period of 10 ms, and if the SNR of node B decreases and triggers the cost threshold, the system automatically switches to path 2, and the switching process multiplexes standby time slot #5, the service has no packet loss and the end-to-end relay delay is continuously ≤ 50 μs.

[0092] Further, the visible light communication transceiver device control method further comprises: When the adjusted visible light communication transceiver device cannot meet the communication quality requirement, the visible light communication link quality of the adjusted visible light communication transceiver device is acquired.

[0093] The controller performs windowed quality evaluation on the current service bearer link to form a set of quantified visible light communication link quality indexes.

[0094] The index set: {BER, PER, SNR, EVM, RTT}. Wherein BER and PER are counted in a 10 ms window, SNR is estimated based on a pilot, EVM is calculated from constellation error, and RTT is measured by periodic probe packets.

[0095] Threshold determination: Set the quality degradation criterion as: BER > 1 × 10 -6 or SNR < 10 dB or PER > 1%, and any of the above conditions lasts for T o = 20 ms. If it is met, it is determined that the visible light communication link quality is lower than the preset threshold.

[0096] Pre-warning mechanism: When SNR ∈ [10, 12) dB and the trend is downward, set the "switching warning flag" and prepare the buffer and parallel resources in advance.

[0097] The current link of node A is measured in three consecutive 10 ms windows: Window 1: SNR = 11.2 dB, BER = 8.5 × 10 -7 , PER = 0.7%; Window 2: SNR = 9.7 dB, BER = 1.9 × 10 -6 , PER = 1.3%; Window 3: SNR = 9.4 dB, BER = 2.2 × 10 -6 , PER = 1.6%.

[0098] Satisfy the condition of "BER > 1 × 10 -6 " and last for > 20 ms, it is determined that the visible light communication link quality is lower than the preset threshold, and the switching step is entered.

[0099] When the visible light communication link quality is lower than the preset threshold, the standby radio frequency channel 15 is activated, and seamless data switching is realized through the optoelectronic cooperative transceiver module 11.

[0100] When the visible light communication link quality is lower than the preset threshold, the standby radio frequency channel 15 is activated, and seamless data switching is realized through the 6G radio frequency auxiliary module 113 and the clock synchronization unit 114 of the optoelectronic cooperative transceiver module 11.

[0101] The system performs a seamless switching sequence of "pre-activation-parallel-cutting" to ensure data continuity and zero packet loss target.

[0102] Pre-activation: Turn on the standby radio frequency channel 15 (Sub-6GHz), initiate access and bearer establishment by the 6G radio frequency auxiliary module 113; at the same time, establish a 4ms pre-buffer (twice the RTT upper bound) at the application layer for double transmission fault tolerance.

[0103] Clock alignment: The clock synchronization unit 114 (10ps level) aligns the time reference of the optical / radio frequency two channels; the baseband multiplexes the same frame number and timestamp, and opens the parallel coding in "make-before-break" mode (the same data frame goes through optical and radio frequency at the same time).

[0104] Switching decision: When the radio frequency bearer reports "steady OK" (SNR RF ≥15dB, PER RF ≤0.5% for 5ms), close the data bearer of the optical link, and only keep the pilot and heartbeat; if the optical link quality recovers to the hysteresis threshold (SNR≥12dB, BER≤5×10 -7 for 20ms), the radio frequency bearer is removed.

[0105] Delay control: The switching process is controlled to be ≤1ms, and the pre-buffer and parallel coding are used to ensure no packet loss; the start and end time of switching and various quality indicators are recorded for operation and maintenance.

[0106] After the node A determines the trigger, it activates the standby radio frequency channel 15 within 0.2ms, the 6G radio frequency auxiliary module 113 completes the access and establishes the bearer within 5ms; after the clock synchronization unit 114 completes the optical / radio frequency alignment, it starts parallel coding, and the service frame can be confirmed by the receiving end 112 on both channels. After 5ms, the radio frequency bearer reaches SNR RF =18dB, PER RF =0.2%, the system cuts off the optical bearer, the overall switching time is 0.8ms, the end-to-end delay fluctuation monitored by the application layer is less than 0.3ms, and the packet loss rate is 0. If the external obstruction is removed and the visible light communication link quality recovers to SNR=13.1dB, BER=4.0×10 -7 for 20ms, the system automatically removes the radio frequency bearer and returns to the pure optical bearer mode.

[0107] In step S200, threshold analysis is performed on the collected data set, and if the collected data set has data exceeding the preset threshold, type determination is performed on the collected data set to obtain a determination result, which specifically includes: The ambient light intensity data in the collected data set is compared with the preset light intensity threshold range, and when the ambient light intensity data exceeds the light intensity threshold range, it is determined as a strong light interference type.

[0108] Controller reads ambient light intensity data I from the acquisition dataset for the last 1s (1000 samples, sampling frequency 1kHz) lux Window average I is calculated in the ring buffer with "sliding window length 200ms, step 10ms" avg Peak I max .

[0109] Compare {I avg ,I max} with light intensity threshold range: set average upper threshold I T,avg =80,000lux, instantaneous peak upper threshold I T,max =90,000lux. If a window appears with I avg >I T,avg or I max >I T,max , it is determined that this window is of strong light interference type. To suppress boundary jitter, introduce 10% hysteresis: after a strong light determination, I avg <72,000lux and I max <81,000lux must be satisfied for ≥200ms to remove strong light state. All window determination results are time-stamped and written into "strong light flag stream" for later conflict resolution.

[0110] An acquisition dataset of a certain intersection in noon period records 3 consecutive windows I avg ={82,300,83,100,81,600}lux in 10:00:00-10:00:01, and the second window I max =92,400lux. Controller generates strong light interference type flag in the 200ms interval t=10:00:00.20-10:00:00.40 accordingly; subsequently the illumination falls back until t=10:00:00.80, when I avg <72,000lux and I max <81,000lux are satisfied simultaneously for ≥200ms, the system removes strong light state.

[0111] Compare the occlusion dynamic data in the acquisition dataset with the preset occlusion rate threshold value, when the occlusion dynamic data exceeds the occlusion rate threshold value, determine the occlusion as a static occlusion type or a dynamic occlusion type through infrared imaging recognition technology.

[0112] Take the occlusion dynamic data of the last 500ms from the acquisition dataset, including the occlusion rate η (derived from the ratio of the area of the occlusion area in the infrared image to the effective area of the received light spot) and the motion speed v (the speed of the occlusion center estimated by the Lucas-Kanade optical flow algorithm, existing algorithm). Set the occlusion rate threshold η T=20% and velocity threshold v T =0.2m / s. When a window exists satisfying η≥η T Type determination upon entry: If v <v T It is determined to be a static occlusion type; if v ≥ v T The occlusion type is determined to be dynamic. To avoid false detections, the same type of occlusion must appear at least twice in three adjacent windows (total duration 220ms) to be considered a valid occlusion type, and the occlusion direction (determined by the occlusion centroid relative to the geometric direction of the receiving array) must be included.

[0113] Within 500ms from 10:05:12.000 to 10:05:12.500, the acquired dataset provides the occlusion rates η={24%,27%,26%} and movement speeds v={0.12,0.15,0.11} m / s for three frames. Since η≥20% and v<0.2m / s occur more than twice in the three frames, the controller outputs a static occlusion type at 10:05:12.220. Subsequently, during another time period, η=31% and v=0.85m / s were observed, and the system outputs a dynamic occlusion type within 200ms, indicating the occlusion direction as "8° to the right front".

[0114] The electromagnetic interference data in the collected dataset is compared with a preset interference intensity threshold. When the electromagnetic interference data exceeds the interference intensity threshold, it is determined to be either narrowband interference or broadband interference based on the interference spectrum characteristics.

[0115] The controller reads electromagnetic interference data from the most recent 100ms, and every 5ms the interference monitoring channel performs 1024 points of analysis on the 1–100MHz frequency band. FF T, extract the peak amplitude of the spectrum P k (dBμV) and equivalent bandwidth B E (MHz). Set the interference strength threshold P. T =80dBμV and bandwidth boundary B NB / WB =20MHz. During a certain event... FF T's P k ≥P T Electromagnetic interference is immediately identified as present: if B simultaneously E ≤20MHz, output narrowband interference type; if B E >20MHz, output wideband interference type. To improve stability, three consecutive [interferences / processes] are used. FF T majority voting strategy (≥2 similar decisions are required for it to take effect), and the center frequency f c Record them together for subsequent suppression strategy mapping.

[0116] Within 100ms from 10:10:03.000 to 10:10:03.100, three times FFThe electromagnetic interference data of T are respectively: First time: P k = 84 dBμV, B E = 12 MHz, f c = 22 MHz; Second time: P k = 83 dBμV, B E = 13 MHz, f c = 22 MHz; Third time: P k = 77 dBμV, B E = 11 MHz.

[0117] The first two times satisfy P k ≥ 80 dBμV and B E ≤ 20 MHz, and the narrowband interference type is output by majority voting, and the center frequency 22 MHz is recorded as a subsequent filtering / avoidance reference; if P k = 88 dBμV, B E = 35 MHz is observed subsequently, it is immediately updated to the wideband interference type.

[0118] The strong light interference type, or the static blocking type, or the dynamic blocking type, or the narrowband interference type, or the wideband interference type is taken as the determination result.

[0119] Conflict arbitration is performed on multiple types of labels that occur at the same time in the same time window, and a unique determination result is generated. The arbitration order is: strong light interference type→blocking dynamic (prefer dynamic blocking type first, then static blocking type)→electromagnetic interference (prefer wideband interference type first, then narrowband interference type). If the upper category is established, the lower category is no longer output. The arbitration result is written into the "determination result register" in the structure of "one-hot + timestamp + confidence", and a "hold timer" of 20 ms is started (used to align with the adjustment execution closed loop). When a new label of higher priority appears within the holding period, the determination result is immediately updated and the hold timer is reset; when the holding period ends and there is no new label, it is decided whether to clear the determination result according to the hysteresis condition.

[0120] In the time window of t=10:15:00.120, three types of labels coexist: strong light interference type (from the first paragraph determination), dynamic blocking type (from the second paragraph determination) and narrowband interference type (from the third paragraph determination). According to the arbitration order, the system outputs a unique determination result = strong light interference type, which is written into the "determination result register", and a 20 ms hold timer is started; if the strong light label disappears after 8 ms and the dynamic blocking type is still established, the dynamic blocking type is immediately used to replace the determination result and reset the timer; if all labels are cleared within the subsequent 25 ms and the hysteresis condition is met, the system clears the determination result and enters the monitoring standby state.

[0121] In step S300, the photoelectric transceiver module 11 is adjusted based on the determination result, and a visible light communication transceiver device after adjustment is obtained.

[0122] The determination result is input into the dual-channel signal processing chip 12 to generate a control instruction, and the control instruction is sent to the adjustment module 132.

[0123] The controller writes the determination result into a control port (CTRL-PORT, SPI 10MHz, bus level 3.3V) of the dual-channel signal processing chip 12. The chip is internally divided into two parallel streams A / B: The A channel (communication side) maintains service demodulation and bit error rate statistics, without interrupting the existing data plane; The B channel (control side) runs an “event-strategy” mapping table, and encodes the determination result (one of the five types: strong light interference type, static shielding type, dynamic shielding type, narrowband interference type, and wideband interference type) into a control instruction.

[0124] The control instruction adopts a 16-byte fixed-length frame: [SYNC (2B)=0xAA55] [CMD (1B)] [SUB (1B)] [PAYLOAD (8B)] [TS (2B)] [CRC16 (2B)]. Among them, CMD is the main token (such as 0x01=power adjustment, 0x02=modulation switching, 0x03=beam pointing, 0x04=parallel chain enable), SUB is the sub-type (such as 0x10=strong light, 0x21=static shielding, 0x22=dynamic shielding, 0x31=narrowband, 0x32=wideband), PAYLOAD fills the target power / angle / modulation system / parallel chain flag, etc. The chip completes command generation and CRC verification within ≤0.3ms, and sends the control instruction into the command FIFO of the adjustment module 132 through the internal high-speed message bus (IHB, 20Mbps). The FIFO depth is 32 frames, and the overflow protection discards the oldest frame and records the event number. The entire “determination→issuing” delay is ≤0.6ms.

[0125] When the determination result is “dynamic shielding type”, the B channel generates: SYNC=AA55, CMD=0x03 (beam pointing), SUB=0x22 (dynamic shielding), PAYLOAD={target angle increment+1.5°, angular velocity 120° / s, acceleration 800° / s², keep 50ms}, TS= current millisecond count, CRC16 normal. The instruction enters the head of the command FIFO of the adjustment module 132 at 0.48ms; the A channel still maintains the original link demodulation and BLER statistics, without affecting service bearing.

[0126] The adjustment module 132 of the environmental self-adaptive adjustment unit 13 performs a corresponding adjustment strategy according to the determination result, and the clock synchronization unit 114 of the photoelectric cooperative transceiver module 11 realizes the synchronous and coordinated work of the gallium nitride-based LED array 1111 and the microlens array 1112, so as to obtain an adjusted visible light communication transceiver device, wherein the adjustment strategy includes: When a control instruction of strong light interference type is received, the gallium nitride-based LED array 1111 is adjusted from the current power value to a low power gear in the range of 5-20W.

[0127] After receiving the control instruction, the adjustment module 132 calls the digital-analog control channel (12-bit DAC, resolution 0.012W / LSB) of the LED power supply to linearly down-regulate the power of the gallium nitride-based LED array 1111 from the current value to the target interval 5-20W; the down-regulation curve adopts a segmented S-shaped trajectory (the first 80% slope is 0.6W / ms, and the last 20% slope is 0.2W / ms), so as to avoid optical mutation to cause AGC oscillation of the receiving end 112. The down-regulation is effective after the 1PPS edge alignment of the clock synchronization unit 114, so as to ensure that the power change is synchronized with the threshold update of the receiving end 112. At the same time, the dual-channel signal processing chip 12 switches the receiver gain table (LNA / AGC) to the “strong light gear” (threshold +4dB, integration time 2ms), so as to ensure the convergence of constellation scattering; the entire power down-regulation-gain table switching-confirmation closed loop is completed within ≤2ms.

[0128] The current LED works at 32W; after receiving the “strong light interference type / power 18W” instruction, the adjustment module 132 smoothly reduces the power to 18W within 1.8ms, and records the LED power supply readback value 17.96W (error <0.25%). After the AGC threshold of the receiving end 112 is up-regulated by 4dB, the measured SNR is increased from 9.8dB to 12.6dB, and the BER is decreased from 2.1×10 -6 to 4.7×10 -7 .

[0129] When a control instruction of narrowband interference type is received, the modulation mode is switched from the current modulation mode to 16QAM or OFDM modulation mode.

[0130] The adjustment module 132 selects the target modulation scheme according to SUB=0x31 in the control instruction and the strategy table: prefer 16QAM; if the strategy table is marked “spectrum avoidance”, switch to OFDM.

[0131] 16QAM switching process: freeze the MCS of the current frame, send 2ms training pilot (including 64-symbol T-SEQ), and reset the equalizer (LMS, step size 0.005) and update the EVM threshold (≤6%) on the receiving side of the dual-channel signal processing chip 12; then switch the modulation mapping to 16QAM at the 1PPS edge.

[0132] OFDM switching procedure: according to the configuration of 256 subcarriers, subcarrier spacing 125 kHz, and cyclic prefix 1 / 8, 20 P r amble symbols are sent to complete subcarrier timing and CFO estimation, and data bearing is enabled at the superframe boundary; the affected subcarrier set corresponding to narrowband interference is mapped from the center frequency ± bandwidth given in the electromagnetic interference data, and is set to "empty subcarriers".

[0133] Both switching paths ensure continuous data flow, and the switching-steady state convergence time is ≤4 ms.

[0134] After the "narrowband interference type / center frequency 22 MHz / bandwidth 12 MHz" arrives, the strategy table selects OFDM and vacates the 8 subcarriers corresponding to 22 MHz. The OFDM switching is completed in 3.6 ms, the EVM drops to 4.1%, the SNR increases to 14.8 dB, and the PER decreases from 1.2% to 0.3%.

[0135] When the control instruction of the wideband interference type is received, the working state of the gallium nitride-based LED array 1111 is maintained and the standby radio frequency channel 15 is activated synchronously.

[0136] When SUB=0x32 indicates the wideband interference type, the adjustment module 132 keeps the current power of the gallium nitride-based LED array 1111 unchanged and the modulation scheme unchanged, and sends a "parallel chain enable" instruction (CMD=0x04) to the 6G radio frequency auxiliary module 113.

[0137] Parallel chain establishment: the standby radio frequency channel 15 (Sub-6GHz) completes access within 0.5 ms, the clock synchronization unit 114 timestamps the optical / radio frequency two bearers for alignment (10 ps level), and enables parallel coding in make-before-break mode; Decision strategy: when the radio frequency bearing satisfies SNR RF ≥15 dB and PER RF ≤0.5% for 5 ms, the data plane weight is linearly transitioned from (optical: radio frequency)=100:0 to 0:100 (transition time 2 ms); after the wideband interference is removed and the hysteresis condition (optical link SNR≥12 dB, BER≤5×10 -7 for 20 ms) is met, it is reversely recovered.

[0138] Service guarantee: the delay jitter during the whole switching process is ≤0.3 ms, and the packet loss rate is 0.

[0139] When the environment appears large-area LED advertising screen flicker caused by wideband interference; the system establishes a standby radio frequency channel 15 within 0.6ms, and meets the steady-state condition after 5.4ms, the weight is cut to 0:100 within 2ms, the end-to-end delay fluctuates from 5.2ms to 5.4ms, and the service has no packet loss; the optical link index recovers after 30ms, and the system switches back to pure optical bearing within 2ms.

[0140] When receiving a control instruction of the static occlusion type, the preset stepping motor drives the microlens array 1112 to adjust the light beam coverage angle to an optimal angle that bypasses the occlusion.

[0141] When SUB=0x21 is the static occlusion type, the adjustment module 132 calls the "static scanning-evaluation-pointing" process: Actuator: micro-stepping motor (1 / 16 micro-step, minimum resolution 0.0563° / step), mechanical stroke 0-120°; position feedback is provided by a 12-bit magnetic encoder (quantization 0.029°).

[0142] Scanning strategy: scanning in a 0.5° step within a ±15° range centered on the current light beam pointing, staying for 5ms / point, and recording the receiving end 112 SNR and BLER; Optimal angle selection: selecting the angle θ with the lowest BLER and the highest SNR as the target angle for "bypassing the occlusion", and if there are parallel angles, selecting the one with the smallest deviation from the initial angle; Pointing and confirmation: moving to θ at an angular velocity of 180° / s and an acceleration of 1200° / s², and re-measuring and solidifying the angle within 10ms after reaching the position.

[0143] The upper limit of this process takes: scanning ≤(61 points x 5ms)=305ms, pointing ≤30ms, and total ≤335ms.

[0144] The current light beam angle is 12°, the optimal point 22.5° (SNR=16.2dB, BLER=0.08%) is obtained by scanning within a ±15° range, the stepping motor reaches the position in 28ms with the set trajectory, and then the index is confirmed to be stable within 10ms, and the link is restored to the target quality.

[0145] When receiving a control instruction of the dynamic occlusion type, a preset servo control system is started to drive the microlens array 1112 for continuous angle tracking adjustment, and the adjustment response time is not more than 10ms.

[0146] When SUB=0x22 is the dynamic occlusion type, the adjustment module 132 enables the servo control system (direct current servo+14-bit photoelectric encoder, angular resolution 0.022°), and adopts "Kalman prediction+PID feedforward compensation" (linear Kalman filter combined with PID) for target angular velocity tracking: Target generation: desired angle θd(t) of beam pointing is mapped from the occlusion direction and speed of the occluder dynamic data; Prediction and control: Kalman filter predicts θ d(t+1) , control law (Feedforward u ff is given by the predicted angular velocity); Clock alignment: clock synchronization unit 114 aligns the tracking step (1 kHz) with the receiver 112 sampling, ensuring synchronization of closed-loop measurement and control; Performance constraints: pointing error |θ-θd|≤0.3°, step rise time ≤8 ms, adjustment response time (from receiving the command to the error entering the ±0.3° interval) no more than 10 ms.

[0147] Recognize that the occlusion is along "right front 8°" with 0.9 m / s crosscut, the system maps the desired angular velocity to 110° / s, and the Kalman prediction outputs the next time angular increment 0.11°; PID parameters K p =0.9, K i =60, K d =0.02, feedforward u ff corresponds to 110° / s. The measured error converges to 0.22° at 7.6 ms, and maintains error ≤0.25° within the subsequent 120 ms, and the link PER decreases from 1.5% to 0.3%.

[0148] Through the description of the above embodiments, those skilled in the art can easily understand that the example embodiments described herein can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solutions according to the embodiments of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a U disk, a mobile hard disk, etc.) or a network, and includes a plurality of instructions to make an electronic device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) execute the method according to the embodiments of the present application.

[0149] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. It is intended that the application be limited only by the scope of the claims, including any amendments thereof, and can include equivalents.

[0150] It should be understood that the application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the claims appended hereto.

Claims

1. A visible light communication transceiver for 6G infrastructure, characterized in that, The visible light communication transceiver includes: Optoelectronic co-transceiver module for data transmission in 6G infrastructure; A dual-channel signal processing chip for parallel demodulation and bit error rate correction of data; An environmental adaptive adjustment unit is used to monitor ambient light intensity, dynamics of obstructions, and electromagnetic interference in real time, and adjust the transmission power, modulation method, and filtering parameters of the optoelectronic co-transceiver module based on the monitoring results. Mesh self-organizing network chip is used in 6G infrastructure scenarios to realize dynamic networking of multiple nodes through optical signal strength ranging and topology optimization algorithms; A backup radio frequency channel is used to automatically switch to the Sub-6GHz band for communication when the visible light link quality is below a preset threshold. The edge computing chip is used to collect and analyze the device's operating parameters and upload the operating parameters to the operation and maintenance platform via a 6G backhaul link.

2. The visible light communication transceiver for 6G infrastructure according to claim 1, characterized in that, The optoelectronic co-transceiver module includes a transmitter, a receiver, a 6G radio frequency auxiliary module, and a clock synchronization unit. The transmitter includes a gallium nitride-based LED array and a microlens array, which are used to achieve dynamic control of the beam angle. The receiving end includes an avalanche photodiode and a silicon-based photodetector array; The 6G radio frequency auxiliary module is used in conjunction with the clock synchronization unit to achieve seamless switching between optical and electrical signals.

3. The visible light communication transceiver for 6G infrastructure according to claim 2, characterized in that, The environmental adaptive adjustment unit includes a multispectral sensor and an adjustment module. The multispectral sensor is used to monitor ambient light intensity, the dynamics of obstructions, and electromagnetic interference in real time at a preset sampling frequency. The adjustment module is used to adjust the emission power and modulation mode of the gallium nitride-based LED array, as well as the optical filter parameters of the microlens array, based on the monitoring results.

4. The visible light communication transceiver for 6G infrastructure according to claim 1, characterized in that, The visible light communication transceiver also includes a magnetic universal interface, a telescopic bracket, and a housing. The magnetic universal interface and the telescopic bracket are used to connect to 6G infrastructure, and the housing is used to isolate the visible light communication transceiver from the external environment.

5. The visible light communication transceiver for 6G infrastructure according to claim 4, characterized in that, The housing has a built-in temperature control module, which is used to adjust the operating ambient temperature of the visible light communication transceiver.

6. A control method for a visible light communication transceiver device for 6G infrastructure, wherein the control method is applied to the visible light communication transceiver device for 6G infrastructure as described in any one of claims 1 to 5, characterized in that, include: The ambient light intensity, dynamics of obstructions, and electromagnetic interference are collected by the environmental adaptive adjustment unit to construct a data collection dataset; Threshold analysis is performed on the collected dataset. If the collected dataset contains data that exceeds a preset threshold, the type of the collected dataset is determined, and a determination result is obtained. Based on the determination result, the optoelectronic co-transceiver module is adjusted to obtain the adjusted visible light communication transceiver device.

7. The control method for a visible light communication transceiver device for 6G infrastructure according to claim 6, characterized in that, The method further includes: When the adjusted visible light communication transceiver cannot meet the communication coverage requirements, the optical signal intensity ranging result of the adjusted visible light communication transceiver is obtained. The optical signal intensity ranging result is input into the Mesh self-organizing network chip to establish a multi-hop relay link with other nearby visible light communication transceivers.

8. The control method for a visible light communication transceiver device for 6G infrastructure according to claim 6, characterized in that, The method further includes: When the adjusted visible light communication transceiver fails to meet the communication quality requirements, the visible light communication link quality of the adjusted visible light communication transceiver is obtained. When the quality of the visible light communication link is lower than a preset threshold, the backup radio frequency channel is activated, and seamless data switching is achieved through the optoelectronic co-transceiver module.

9. The control method for a visible light communication transceiver device for 6G infrastructure according to claim 6, characterized in that, The step of performing threshold analysis on the collected dataset, and determining the type of the collected dataset and obtaining the determination result if the collected dataset contains data exceeding a preset threshold, includes: The ambient light intensity data in the collected dataset is compared with a preset light intensity threshold range. When the ambient light intensity data exceeds the light intensity threshold range, it is determined to be a strong light interference type. The dynamic data of the obstruction in the collected dataset is compared with a preset obstruction rate threshold. When the dynamic data of the obstruction exceeds the obstruction rate threshold, the obstruction is determined to be either a static obstruction or a dynamic obstruction by infrared imaging recognition technology. The electromagnetic interference data in the collected dataset is compared with a preset interference intensity threshold. When the electromagnetic interference data exceeds the interference intensity threshold, it is determined to be either narrowband interference or broadband interference based on the interference spectrum characteristics. The type of strong light interference, static occlusion, dynamic occlusion, narrowband interference, or broadband interference is used as the determination result.

10. The control method for a visible light communication transceiver device for 6G infrastructure according to claim 9, characterized in that, The step of adjusting the optoelectronic co-transceiver module based on the determination result to obtain the adjusted visible light communication transceiver device includes: The determination result is input into the dual-channel signal processing chip to generate control commands, and the control commands are sent to the environmental adaptive adjustment unit. The environmental adaptive adjustment unit performs a corresponding adjustment strategy based on the determination result, and the optoelectronic cooperative transceiver module achieves synchronous and coordinated operation to obtain the adjusted visible light communication transceiver device. The adjustment strategy includes: When a control command of the type of strong light interference is received, the power of the optoelectronic co-transceiver module will be adjusted from the current power value to a low power level in the range of 5-20W. When a control command for narrowband interference is received, the modulation mode will be switched from the current modulation mode to 16QAM or OFDM modulation mode. When a control command of broadband interference type is received, the working state of the optoelectronic co-transceiver module is maintained and the backup radio frequency channel is activated synchronously. When a control command of static obstruction type is received, the optoelectronic co-transceiver module is driven by a preset stepper motor to adjust the beam coverage angle to the optimal angle to bypass the obstruction; When a control command of dynamic occlusion type is received, the preset servo control system is activated to drive the optoelectronic co-transceiver module to perform continuous angle tracking and adjustment.

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