2690 results about "Subcarrier" patented technology

The dynamic bandwidth allocation and resource scheduling method based on the 5G network comprises the steps that S1, a base station collects service requests, network loads and channel information of user equipment of the 5G network, and the services are divided into real-time services, big data services, key services and conventional services; s2, the real-time service calculates the bandwidth by using deep learning; the big data service is distributed according to the idle bandwidth and the data volume proportion; key service main and standby links distribute bandwidths; conventional businesses come first and then are subjected to service distribution; s3, the base station maps bandwidth resources by using a multi-carrier and dynamic subcarrier algorithm, and optimizes signal transmission in combination with a beam forming technology; s4, processing service data according to a priority scheduling queue, and verifying signal transmission according to a channel quality adjustment coding mode; and S5, updating the data and evaluating the effect according to the user feedback, and re-optimizing the scheduling strategy as required. Through intelligent dynamic bandwidth allocation and resource scheduling, efficient, flexible and reliable transmission of different types of services is realized, and the network resource utilization rate and the service quality are improved.

The invention provides a VDSL ultra-low time delay communication method and system, and relates to the technical field of communication, and the method comprises the steps: encrypting a clock synchronization channel through a quantum key distribution protocol, dynamically dividing micro time slot resources in an orthogonal frequency division multiplexing symbol period, and generating a dynamically adjusted micro time slot resource distribution result; calculating an optimal phase offset matrix of the metasurface intelligent reflecting surface through a depth deterministic strategy gradient algorithm to obtain an optimized electromagnetic wave propagation path; generating a global optimization check matrix by aggregating the locally trained lightweight error correction model gradient of each node to obtain a compensated data stream; and constructing a causal graph model dynamic pruning high-entropy path to minimize causal entropy, through multi-agent reinforcement learning, taking time delay-energy efficiency as a game target to decide an optimal modulation order and a subcarrier switching strategy, and obtaining an optimized stable communication link. According to the invention, high-reliability and low-delay communication basic support is provided for high-precision intelligent manufacturing.

The invention discloses a three-dimensional signal secure transmission method and device based on index modulation. The method comprises the following steps: generating four-dimensional chaotic sequences X, Y, Z and U from a key initial value through a chaotic model; performing XOR operation on the original data by using an encrypted sequence generated by X and U in the four-dimensional chaotic sequence to obtain encrypted data; performing binary conversion on the key initial value to obtain a binary key initial value consisting of N four bits; dividing the encrypted data into N groups, each group having 15 subcarriers, determining a to-be-inserted silent position of each group of subcarriers according to a binary key initial value, performing three-dimensional mapping after the silent subcarriers are inserted, and setting the silent subcarriers at an original point position to obtain a three-dimensional constellation diagram; performing constellation masking on the three-dimensional constellation diagram by using Y and Z in the four-dimensional chaos sequence; carrying out IFFT (Inverse Fast Fourier Transform) on the three-dimensional constellation diagram after constellation masking, adding a suffix, and carrying out parallel-serial conversion to obtain transmission data; and transmitting the transmission data to a receiving end through an optical fiber channel.

The invention provides an unmanned aerial vehicle group wide area suppression method and system based on multi-band frequency hopping interference. The method comprises the following steps: analyzing a frequency hopping rule and an encryption feature of a communication link of a target unmanned aerial vehicle group, and constructing a protocol feature library containing a multi-band frequency hopping sequence; deploying a directional focusing antenna array, and generating a directional interference energy signal covering a multi-band frequency hopping channel of the hotspot area of the unmanned aerial vehicle group; based on the encryption features and the frequency hopping sequence in the protocol feature library, performing parameter setting and subcarrier modulation adaptation on a preset interference signal, generating an adjustable interference signal, and converting the adjustable interference signal into an interference injection signal; extracting a time distribution rule of the frequency hopping sequence, dynamically and cooperatively adjusting an injection frequency band of interference energy and a signal, and generating a frequency band coordination strategy; and performing multi-band dynamic distribution on the interference energy and the signal to generate a wide-area suppression signal. According to the technical scheme provided by the invention, the blocking efficiency of unmanned aerial vehicle group cooperative control in a complex electromagnetic environment is improved.

The invention provides a 5G communication method and system based on environmental adaptation, and the method comprises the steps: fusing electromagnetic field intensity distribution, a terminal density thermodynamic diagram and obstacle reflection data through distributed sensing nodes, and generating a dynamic environment sensing matrix. Based on the matrix, establishing a beam pointing model of the motion trail of the user equipment cluster, dynamically adjusting the radiation direction of a beam main lobe, and creating a null region. And in combination with real-time channel multipath phase characteristics, non-uniform interval subcarrier distribution is reconstructed, and multipath phase compensation is carried out. A main lobe radiation direction and a subcarrier distribution mode are integrated into a physical layer structure, and the spatial multiplexing density of a time-frequency resource block is dynamically adjusted according to a service priority. And iteratively optimizing a collaborative matching threshold value of each parameter through closed-loop interaction of a forward channel response feature and a reverse control instruction. According to the invention, the anti-interference capability and the spectrum efficiency of the communication system are improved.

The invention discloses a flood disaster monitoring and early warning system and a flood disaster monitoring and early warning method. A cloud, rain, water and I integrated sensing network is constructed through a full-chain monitoring capability; a hybrid prediction model coupled with HEC-HMS and SWMM physical models and an LSTM-Transformer deep learning architecture is established, parameter deviation is dynamically corrected through NSGA-II and a symbolic regression multi-objective optimization algorithm, the flood prediction period is prolonged to 10 days (the precision of the southern watershed is larger than or equal to 90%, and the precision of the northern watershed is larger than or equal to 70%), the flood peak time error is compressed to be within 30 minutes, and compared with a scheme based on a static flood risk model, the method has the advantage that the flood prediction efficiency is greatly improved. The false alarm rate is reduced from 20% to 5% through the dynamic threshold calibration technology; hierarchical response and survivability communication are adopted, Beidou satellite and NB-IoT dual-channel redundant transmission is deployed, and a Mesh ad hoc network and frequency modulation subcarrier technology are combined, so that the direct rate of early warning information in extreme weather is ensured to be greater than or equal to 99%; and three-dimensional GIS platform dynamic rendering is supported, and collaborative visualization of a submerging thermodynamic diagram, a material scheduling path and ecological flow monitoring is realized.

The invention provides an optical-electric hybrid ultra-low time delay communication method and system, and relates to the technical field of communication, and the method comprises the steps: outputting a global synchronous clock signal with clock jitter less than 1ppm, dynamically dividing micro time slot resources in an orthogonal frequency division multiplexing symbol period, and generating a dynamically adjusted micro time slot resource distribution result; calculating an optimal phase offset matrix of the metasurface intelligent reflecting surface through a depth deterministic strategy gradient algorithm to obtain an optimized electromagnetic wave propagation path; generating a global optimization check matrix by aggregating the locally trained lightweight error correction model gradient of each node to obtain a compensated data stream; and constructing a causal graph model dynamic pruning high-entropy path to minimize causal entropy, through multi-agent reinforcement learning, taking time delay-energy efficiency as a game target to decide an optimal modulation order and a subcarrier switching strategy, and obtaining an optimized stable communication link. According to the invention, high-reliability and low-delay communication basic support is provided for high-precision intelligent manufacturing.

The invention discloses a multi-mode optical signal transmission method and device, electronic equipment and a storage medium, and relates to the technical field of computers.The transmitted data stream is divided into a control signal and a data signal, the control signal is a visible light wave band, the data signal is an infrared wave band, and the control signal and the data signal are combined to a single multi-core optical fiber through a combiner; the optical network controller allocates subcarrier resources as required according to the change of network flow in a spectrum dynamic allocation mode to perform data transmission, so that the subcarrier resource allocation adapted to the change of network flow improves the dynamic adaptability, and the allocation of the subcarrier resources as required improves the equipment cooperation efficiency, and in the data transmission process, the data transmission efficiency is improved. Clock synchronization and signal encryption are realized through a quantum key distribution mode, and the security is improved.

The invention relates to the technical field of data fusion transmission, and provides a heterogeneous data fusion transmission method and system for airborne multimode satellite communication. Acquiring real-time communication parameters including a dynamic spectrum occupancy state, a polarization direction difference and a hidden transmission demand level; generating a dynamic frequency hopping control instruction based on the time-varying characteristic of the dynamic spectrum occupancy state, driving carrier switching and reserving a spectrum isolation area between adjacent carriers; performing orthogonal polarization diversity analysis on the carrier switching result based on the polarization direction difference, suppressing cross polarization interference and outputting multiple paths of baseband signals; calling a preset waveform parameter library according to the hidden demand level to determine a modulation parameter, and loading the baseband signal to the asymmetric phase subcarrier to generate a hidden modulation waveform; and fusing the frequency hopping instruction and the hidden modulation waveform to generate a cooperative modulation instruction, and controlling the radio frequency unit to realize anti-interference fusion transmission. According to the technical scheme provided by the invention, the anti-interference capability of fusion transmission of multi-mode satellite data in a dynamic spectrum environment is improved.

The invention provides a covert communication method based on near-field broadband super-large-scale array beam splitting. Comprising the following steps: S1, according to an applied near-field covert communication scene, constructing a corresponding communication model by using a beam splitting effect in a broadband XL-MIMO system, carrying out beam training, and describing a received signal expression of the communication model; s2, constructing a signal detection model of a listener according to a near-field covert communication scene, and describing a detection error probability expression and a covert constraint expression; and step S3, the hidden transmission rate is maximized by optimizing the transmitting power and the subcarrier number of the transmitter. According to the method, the two-dimensional optimization problem related to the transmitting power and the subcarriers is converted into the one-dimensional optimization problem related to the discrete variable quantum carrier number, and the concealment rate of a legal receiver is maximized.

The invention provides an Internet of Vehicles broadcast frame radio frequency fingerprint identification method based on LMMSE channel estimation. The method comprises the following steps: obtaining subcarrier data in a resource grid based on an obtained signal of a physical side link broadcast channel; performing root-mean-square delay expansion and channel autocorrelation matrix construction based on the subcarrier data, and combining priori signal-to-noise ratio regularization and time domain windowing operation to obtain a channel estimation value; initial radio frequency fingerprint features are obtained through the channel equalization and the channel estimation value, and the improved neural network and the initial radio frequency fingerprint features are utilized to carry out classification identification on the Internet of Vehicles equipment. Influences of noise and channels on fingerprints are effectively considered, and the purpose of extracting fingerprints of different devices in a complex environment more accurately is achieved.

A signal for wireless transmission is modulated by converting a serial sequence of symbols in the time domain into parallel symbol streams, transforming the parallel symbol streams into the frequency domain, mapping the resulting frequency domain signals onto subcarriers, converting the mapped signals into the time domain and converting the parallel time-domain signals into a serial signal. The serial signal is subjected to chirping and is transmitted to a receiver after adding a cyclic prefix (CP). The receiver removes the CP from the signal and, after de-chirping the prefix-less signal, converts the signal into parallel signals. The parallel signals are converted into the frequency domain for channel estimation, equalisation, and subcarrier mapping of detected symbols. The mapped symbols are transformed into the time domain before converting them into a serial stream of symbols.

The invention discloses an unmanned aerial vehicle soft landing control method based on track prediction and multi-source cooperative decoy, and the method comprises the steps: introducing a communication protocol recognition mechanism in a blocking process of an instruction link of an unmanned aerial vehicle, and achieving the conversion from extensive broadband suppression to protocol precise interference; the problems that in the prior art, power consumption is high, interference on legal communication is large, and the frequency hopping unmanned aerial vehicle resisting effect is insufficient can be effectively solved. In the scheme, signal integrity is guaranteed through monitoring and preprocessing, an unmanned aerial vehicle link protocol is identified through feature extraction and protocol library matching, and then a targeted interference template is generated, so that the interference effect can accurately fall on key positions such as a leader sequence, a CRC field, a subcarrier or a control frame and the like; therefore, synchronization, verification or data transmission can be destroyed under the condition of low power, and accidental damage of broadband noise to services such as co-frequency Wi-Fi and Bluetooth is avoided.

The present invention discloses a method and device for transmitting network time synchronization messages applicable to any channel environment, including: classifying the data bits of the time synchronization messages to be transmitted to obtain public information bits and secret information bits, and performing Polar coding on the data of the time synchronization messages to obtain a first coding sequence; dividing all data subcarriers within the transmission bandwidth into sub-blocks according to the number of legitimate receivers, and dividing each sub-block to obtain clusters, performing IM modulation on each cluster to determine the active subcarrier indices of each cluster; interleaving the symbol vector obtained by modulating the first coding sequence based on the total frequency-domain channel matrix characteristics of a preset channel simulation system; modulating the interleaved symbol vector onto the active subcarriers selected for each sub-block to complete OFDM-IM modulation, and sending the modulated OFDM-IM signal to each legitimate receiver. The present invention solves the problems of poor security and limited application scenarios in the transmission of network time synchronization messages.

Technologies directed to respiration monitoring based on noise channel state information (CSI) data are described. A method includes receiving CSI data representing channel properties of a wireless channel used by a first wireless device and a second wireless device located in a geographical region. The method generates a set of CSI samples by sampling the CSI data and removes one or more outlier CSI samples using a sparse outlier process, and removes a cluster of outlier samples using a cluster outlier process. The method determines Fast Fourier Transform (FFT) data for each channel subcarrier index and a signal-to-noise ratio (SNR) value for each channel subcarrier index, and identifies a first number of channel subcarrier indexes having highest SNR values to obtain a subset of FFT data, which represents a breathing spectrum. The method determines a respiratory rate of a user in the geographical region from the subset of the FFT data.

The embodiment of the invention provides a synchronization signal transmission method, device and system, which are used for realizing synchronization signals compatible with different types of terminal devices. The method comprises: determining a synchronization signal comprising a plurality of subsequences, each of the plurality of subsequences being mapped to a subcarrier of orthogonal frequency division multiplexing (OFDM), the bandwidth of the synchronization signal being greater than or equal to the bandwidth of any one of the plurality of subsequences; and sending a synchronization signal to the terminal device, wherein the synchronization signal is used for the terminal device to execute downlink synchronization.

Disclosed are techniques for wireless communication. In an aspect, a network node receives, from a network entity, a configuration for reporting carrier phase measurements of one or more reference signal resources spanning a plurality of subcarriers, wherein the configuration indicates one or more center frequencies to use for reporting the carrier phase measurements, obtains one or more carrier phase measurements of the one or more reference signal resources based on the one or more center frequencies, and reports, to the network entity, the one or more carrier phase measurements.

Disclosed are systems, apparatuses, processes, and computer-readable media for wireless communications, such as to measure a location of a user equipment (UE). A process may include transmitting, at the UE (305), a phase measurement capability of the UE to a network entity (310, 315, 320) for determining a position of the UE. The process may further include receiving, at the UE from the network entity, a phase measurement request for reporting phase measurements for one or more subcarriers received by the UE. The phase measurement request is based on the phase measurement capability of the UE. The process may further include transmitting a phase measurement report to the network entity based on the phase measurement request. The phase measurement report includes information associated with a measured phase of at least one subcarrier of the one or more subcarriers.

The invention discloses a communication data transmission method and system for an intelligent charging pile, and relates to the technical field of intelligent charging pile communication, and the method comprises the steps: constructing a reverse power line transmission channel model based on an equivalent channel response matrix, extracting channel frequency response, generating a channel equalization configuration parameter set through a joint optimization equalization algorithm, and transmitting the channel equalization configuration parameter set to a communication module. Subcarrier modulation orders are dynamically allocated according to the signal-to-noise ratio parameter, and a pre-balanced OFDM time domain signal is generated; on the basis of the channel equalization configuration parameter set and the pre-equalization OFDM time domain signal, dynamically monitoring power frequency harmonic noise of the cable, and inhibiting interference through a filtering algorithm to generate a clean power line carrier signal; and generating a verified V2G communication control instruction through a cyclic redundancy check method based on the clean power line carrier signal in combination with the main polarization direction feature vector. According to the method, an accurate channel model is constructed by combining an equivalent channel response matrix and cable characteristics, and dynamic subcarrier distribution is realized based on signal-to-noise ratio parameters.

The invention relates to the technical field of backscatter communication, and discloses a single-receiver WiFi backscatter method based on frequency domain cyclic shift. The method comprises the following steps: a transmitting end modulates data onto N frequency domain subcarriers, converts the N frequency domain subcarriers into N time domain samples through inverse fast Fourier transform, and forms an orthogonal frequency division multiplexing WiFi signal taking an OFDM symbol as a basic unit after adding a cyclic prefix; the label receives the WiFi signal, and performs sub-symbol-level modulation on an OFDM symbol in the WiFi signal based on a modulation technology of frequency domain cyclic shift; and the receiver determines the cyclic shift value of the frequency domain subcarrier through the frequency domain invariance of the OFDM symbol, and demodulates the received reflected signal to recover the label data. According to the invention, sub-symbol-level label data modulation is realized, the data transmission efficiency is improved, only a single symbol bandwidth is needed, and the waste of spectrum resources is avoided.

A method performed by an access point (AP) to receive uplink trigger-based physical layer protocol data units (PPDUs) from stations (STAs) in accordance with a distributed tone resource unit (dRU) tone plan for a distribution bandwidth. The method includes assigning dRUs to the STAs in the distribution bandwidth, wherein the dRU tone plan for the distribution bandwidth specifies a set of non-contiguous data tones for each of the dRUs, wherein the dRU tone plan for the distribution bandwidth further specifies pilot tones that are located at the same subcarrier indices as pilot tones specified by a regular non-distributed tone resource unit (rRU) tone plan for the distribution bandwidth. The method further includes soliciting the uplink trigger-based PPDUs from the STAs in accordance with the assignment and receiving the uplink trigger-based PPDUs from the STAs in the dRUs assigned to the STAs in accordance with the dRU tone plan for the distribution bandwidth.

The invention discloses a secure data transmission method for a wireless communication system, which relates to the technical field of secure data transmission and comprises three steps of key generation and synchronization, physical layer subcarrier encryption and key enhancement and authentication. The method comprises the following steps: firstly, extracting multi-dimensional features through channel detection to generate a dynamic initial key, and setting a trigger condition to realize key synchronization; then, a permutation matrix is generated by using a secret key to perform scrambling encryption on a data subcarrier position, and a receiving end performs descrambling and then performs feedback through CRC verification so as to guarantee data integrity; and finally, quantum noise is introduced to enhance the randomness of the secret key, and zero-knowledge authentication is adopted to verify the identity, so that the security and the anti-attack capability of wireless communication data transmission are effectively improved.

The invention discloses an OFDM radar vital sign signal separation method based on FGO-VMD and multi-feature clustering, and belongs to the technical field of radar communication integration. According to the method, an OFDM signal radar is used for carrying out human body detection, multi-subcarrier phase difference linear regression is used for estimating displacement, thoracic cavity micro-motion signals are extracted, an FGO-VMD joint optimization model is provided, the modal number and penalty factor parameters of a VMD decomposition algorithm are adaptively determined through minimum envelope entropy, and a multi-feature clustering and weighted reconstruction strategy is designed. And in combination with frequency band screening and correlation coefficient weighting, the separation robustness of the respiratory signal and the heartbeat signal is enhanced, and high-precision separation of the vital sign signal is realized. According to the method, non-contact vital sign detection based on OFDM radar signals is achieved, the problems that in a traditional algorithm, parameters of modal numbers and penalty factors need to be manually set, and signal amplitude attenuation and modal aliasing are caused under complex noise are solved, the vital sign monitoring precision is remarkably improved, and high-precision separation of vital sign signals is achieved.

The invention discloses a collaborative optical transmission method and device based on multi-layer index modulation. The method comprises the following steps: acquiring a key and to-be-sent original data; generating a four-dimensional chaotic sequence through a four-dimensional chaotic model according to the key; performing constellation mapping on the original data to obtain a 16QAM constellation signal; performing secondary scrambling on subcarriers and symbols of the 16QAM constellation signal by using the four-dimensional chaotic sequence to obtain a 16QAM scrambling signal; performing binary conversion on the secret key to divide the secret key into a first group of secret keys and a second group of secret keys; performing first-layer index modulation on the 16QAM scrambling signal by using the first group of keys to obtain a first modulation signal, and performing second-layer SIM index modulation on the first modulation signal by using the second group of keys to obtain a second modulation signal; and performing OFDM modulation on the second modulation signal, and transmitting the second modulation signal in an optical fiber channel. The security of a communication system is improved by means of the transmission of the index modulation masking key twice in combination with the multi-dimensional disturbance of subcarriers and symbols.

Methods, systems, and devices for wireless communications are described. A network entity may perform digital post distortion (DPoD) using signals transmitted from multiple user equipments (UEs) on adjacent frequency resources. Each UE may transmit, to the network entity, a data message on a first set of frequency resources and a pilot signal associated with the data message on a set of subcarriers within a second set of frequency resources. The first set of frequency resources may be a subset of the second set of frequency resources. The set of subcarriers includes one of odd or even indexed subcarriers within the second set of frequency resources. A first portion of the set of subcarriers may be within the first set of frequency resources and a second portion of the set of subcarriers may be within the second set of frequency resources and outside the first set of frequency resources.

The invention discloses a quantum noise stream signal transmission method and device based on odd-order constellation forming in the technical field of optical transmission communication. The method comprises the following steps: generating four-dimensional chaotic sequences X, Y, Z and W by utilizing a 4D hyperchaotic model according to an initial key; performing serial-to-parallel conversion and up-sampling on the initial key, introducing error bits into a key matrix by utilizing W, and dividing the key matrix into a first state basis matrix and a second state basis matrix; performing specificity comparison or processing on the original data by using the X to obtain first data; dividing the first data into a data matrix and an index bit matrix, and performing joint index modulation to obtain a 9QAM signal; scrambling a subcarrier and a symbol point of the 9QAM signal by using the Y and the Z to obtain a 9QAM scrambled signal; and performing quasi-quantum noise stream encryption processing on the 9QAM scrambling signal by using the first state basis matrix and the second state basis matrix to obtain a 576QAM encrypted signal, performing OFDM modulation, and transmitting the 576QAM encrypted signal in an optical fiber channel.

The invention discloses a signal transmission method and device based on orthogonal matrix precoding. The method comprises the steps that four chaotic sequences X, Y, Z and W are generated through a four-dimensional chaotic model according to a key initial value; performing bit interleaving on the original data by using X and W to obtain first data; performing serial-to-parallel conversion and QPSK mapping to obtain a mapping signal; scrambling the subcarriers and symbols of the mapping signals by using Y and Z to obtain encrypted data; carrying out IFFT (Inverse Fast Fourier Transform) on the encrypted data, adding a cyclic prefix, and carrying out parallel-serial conversion to obtain an encrypted data stream; performing binary conversion and serial-parallel conversion on the key initial value to obtain a square matrix K, and shaping the square matrix K by using a public key to obtain a key matrix; performing serial-to-parallel conversion, QPSK mapping, IFFT, cyclic prefix addition and parallel-to-serial conversion on the key matrix to obtain a key stream; and performing linear superposition on the encrypted data stream and the key stream through power distribution to obtain a power division multiplexing orthogonal frequency division multiplexing signal, and transmitting the power division multiplexing orthogonal frequency division multiplexing signal.

The invention discloses a power line carrier signal processing method and device, a storage medium and a chip, and belongs to the technical field of power communication. The method comprises the following steps: monitoring a power line carrier communication link; under the condition that the idle symbols are received, collecting noise data of each subcarrier; determining interfered subcarriers based on the noise data accumulated by each subcarrier, and updating available coefficients of the interfered subcarriers; under the condition that the effective symbols are received, extracting data sub-blocks borne on each sub-carrier; the data sub-blocks are obtained by performing diversity copying on the data blocks through the sending end; and reconstructing the data sub-block based on the available coefficient of each sub-carrier to obtain a data block sent by the sending end. According to the method, the interfered subcarriers are detected and analyzed, and the available coefficients are introduced to adjust the weight of the subcarriers during combined decoding, so that the influence of communication interference is reduced, and the data decoding accuracy and the robustness of a communication system are improved.

The invention discloses a quantum key distribution method, device and system, and belongs to the technical field of networks. The first quantum device generates a modulated optical signal carrying quantum information and classic information. The classic information and the quantum information are simultaneously modulated on at least one polarization of the modulated optical signal. The modulated optical signal includes a plurality of subcarriers at different frequency bands. The classic information and the quantum information are located within different ones of the plurality of subcarriers. The classical information comprises quantum key negotiation information. The first quantum device sends the modulated optical signal to the second quantum device over the optical fiber link. Quantum information and classical information are modulated on the same polarization of an optical signal, and the system capacity is high. The quantum information and the classical information are respectively modulated on subcarriers in different frequency bands in the optical signal, so that respective modulation precision requirements of the classical signal and the quantum signal can be met. And quantum information and classical information are transmitted simultaneously by multiplexing a set of devices, so that the hardware cost is saved.

The invention relates to the technical field of data communication, in particular to a WiFi (Wireless Fidelity)-based data communication method and system. The method comprises the following steps: acquiring a routing WiFi (Wireless Fidelity) 6 networking control authority, acquiring a signal frequency band state and identifying a frequency band load state; then, the load state is converted into a spectrogram, and throughput attenuation simulation and adjacent channel interference risk quantification are carried out; then, fitting a network congestion increment index according to the data packet loss risk and throughput attenuation data, and performing channel frequency band planning and OFDMA subcarrier allocation optimization according to the network congestion increment index; and finally, designing a WiFi (Wireless Fidelity) data communication strategy, and sending the WiFi data communication strategy to a control center to implement the optimized data communication method. According to the invention, the data communication technology is optimized, so that the data communication technology is more perfect.