888 results about "Remote communication" patented technology

The invention relates to the technical field of electrical variable measurement, in particular to a control system and a control method of a battery measuring instrument. The method comprises the following steps: acquiring single voltage, total voltage, current and internal resistance data of a battery pack to obtain initial electrical parameters; collecting the surface temperature of the battery pack to obtain an initial thermodynamic parameter; performing synchronous time sequence integration on the initial electrical parameters and the initial thermodynamic parameters, and unifying formats to obtain a battery running state monitoring data set; and performing dynamic threshold determination and trend analysis on each parameter based on the battery operation monitoring data set to obtain an abnormal state identification result. By constructing a complete intelligent monitoring system covering data acquisition, processing, abnormity identification, state evaluation, communication packaging and visualization, high-precision real-time monitoring, fault pre-judgment and remote communication of the running state of the battery are realized, and the synchronism, the accuracy and the adaptability of the system and the intelligence and the practicability of field application are remarkably improved.

The embodiment of the invention provides a cloud side-end cooperative control method and system based on remote communication. The method comprises the following steps: generating a task scheduling input data set according to real-time operation state data generated by terminal equipment in a remote communication process, current computing resource information of an edge computing node and global optimization target parameters issued by a cloud management system; calling a preset task scheduling decision model to carry out structured splitting on the cloud side-end cooperative control task to obtain original task structure information; task structure labeling information is generated for sub-task labeling priorities in combination with multi-aspect information, and cyclic matching deduction processing is performed on the task structure labeling information to obtain a hierarchical resource allocation result; and distributing the sub-tasks to corresponding cloud edge end nodes (including a first node corresponding to the terminal device, a second node corresponding to the edge computing node and a third node corresponding to the cloud management system) for execution, and configuring a task execution process adjustment mechanism based on real-time resource change to adapt to resource fluctuation.

The invention belongs to the technical field of nerve regulation and control, and discloses a portable noninvasive brain deep electrical stimulation system based on time interference, and the system comprises an electroencephalogram signal collection unit which is used for obtaining an electroencephalogram signal in a high-quality resting state, and carrying out the signal preprocessing and feature extraction, thereby obtaining an optimal stimulation envelope frequency; the personalized finite element modeling unit is used for constructing a head personalized model and outputting optimal electrode configuration and stimulation parameters for a target brain region target spot; the electrode positioning and stimulation execution unit is used for realizing accurate positioning of an electrode position and implementing time interference electrical stimulation; the MCU unit is used for realizing data management, task scheduling and remote communication; the human-computer interaction unit is used for realizing visual treatment flow and parameter setting; and the power supply management unit provides stable working voltage for the system. According to the invention, the portable, intelligent and personalized modeling of the electrical stimulation treatment equipment is realized, and the precision and efficiency of nerve regulation and control are remarkably improved.

The invention discloses a deterministic soft bus communication method for a virtualized industrial control system, and relates to the field of industrial automation. According to the method, a soft bus communication mode is adopted, so that the containers are interacted through the intermediate message bus, and direct connection does not need to be directly established; all data streams are managed by a unified bus, so that the number of connections is reduced; and meanwhile, a shared memory zero copy mechanism is adopted to optimize data transmission, and the data is directly shared between a producer and a consumer by using a shared memory and a direct memory mapping mode, so that unnecessary copy operation is avoided, the overhead of data transmission is reduced, and the communication efficiency is improved. According to the invention, a unified and efficient communication channel can be established among a plurality of industrial edge applications on the edge device, real-time communication among local containers is supported, automatic routing capability of remote communication is realized, and the communication requirements of high concurrency and high real-time performance in a virtualized industrial control system are met.

Wideband simultaneous transmit and receive communications on overlapping frequency bands may be achieved by communicating via a communication device having a transmit signal path and a receive signal path. The transmit signal path and receive signal path are operable to transmit and receive simultaneously at the same frequency. A first remote communication device communicates over a first interference suppressed band using a first channel in the transmit signal path and receive signal path. A second remote communication device communicates over a second interference suppressed band using a second channel in the transmit signal path and receive signal path.

The invention discloses an electric energy metering device remote interaction system based on parallel communication, relates to the field of electric energy metering and remote communication, and solves the problems that an existing system is low in data transmission efficiency, poor in reliability and insufficient in safety. The system comprises a system master station module, an electric quantity acquisition terminal module, a parallel communication module and a fault early warning module. The parallel communication module comprises a parallel interface unit, a communication protocol diagnosis unit, a communication control module, a communication protocol matching unit and a parallel communication protocol unit, and allows multiple channels to transmit data at the same time. The system master station module is responsible for data processing, management and control, the electric quantity acquisition terminal module is responsible for acquiring and transmitting data in real time, and the fault early warning module ensures safe and stable operation of the system. According to the scheme, the data transmission efficiency and reliability are improved through the parallel communication technology.

The invention relates to the technical field of Internet of Things communication, in particular to an Internet of Things-based low-power-consumption remote communication method, which comprises the following steps of: acquiring data information of each Internet of Things node to form a communication behavior corresponding to each Internet of Things node; the method comprises the following steps: acquiring communication times and associated parameters of each communication behavior, and deriving a state label of each Internet of Things node according to a relative coverage range and a relative distance of each Internet of Things node; performing abnormal behavior analysis on the Internet of Things nodes in the different state labels based on the dormancy instruction received by each Internet of Things node, and evaluating the index deviation degree of each Internet of Things node under the abnormal communication behavior; generating a parameter processing sequence based on the index deviation degree of each Internet of Things node; and performing anomaly detection on the parameter processing sequence according to the number of abnormal nodes on each Internet of Things node during transmission, and adjusting the control strategy of each Internet of Things node according to the distribution difference of each abnormal node. And the reliability and efficiency of low-power-consumption remote communication are realized.

The invention discloses a remote warning and monitoring system and method for an insulin pump, and relates to the technical field of medical equipment monitoring, and the system comprises a data collection module which is used for obtaining multi-modal physiological and equipment data from user side equipment in real time; the risk assessment engine is used for performing fusion analysis based on the multi-modal physiological and equipment data to generate a comprehensive risk assessment result; the dynamic early warning module is used for dynamically triggering warning information of different risk levels according to the comprehensive risk assessment result; the remote communication module is used for simultaneously pushing the warning information to at least one remote monitoring terminal and user side equipment; and the remote intervention interface is integrated on the remote monitoring terminal and is used for receiving and displaying the warning information and enabling a remote guardian to initiate at least one intervention instruction. Alarm omission caused by the fact that a patient is alone or the response ability is limited is effectively avoided; the accuracy and reliability of risk assessment are improved, and false alarms are reduced; the risk response time is shortened, and the safety of patients is guaranteed.

The invention relates to the technical field of switch cabinets, in particular to an intelligent photovoltaic grid-connected cabinet with fireproof and remote communication monitoring functions, which comprises a photovoltaic grid-connected cabinet main body, a starting end box is fixedly connected to the outer wall of the photovoltaic grid-connected cabinet main body, and an electric telescopic rod is fixedly mounted on the inner wall of the starting end box. And the output end of the electric telescopic rod is fixedly connected with a first sliding block, the outer wall of the first sliding block is fixedly connected with a guide rod, and the outer wall of the guide rod is slidably connected with a second sliding block. The brushes between the adjacent first bus bridge branch connecting plates make reciprocating motion left and right after abutting against the ends, the brushes are promoted to extrude the outer walls of the first bus bridge branch connecting plates on the two sides left and right, and bristles of the brushes can be attached to the outer walls of the first bus bridge branch connecting plates to be extruded, deformed and brushed; and the dust on the outer wall of the first bus bridge branch connecting plate is cleaned.

The invention discloses an electronic watt-hour meter intelligent data processing system and method based on remote communication, and relates to the technical field of watt-hour meter data processing.The method comprises the steps that windowing management is conducted on electric energy data, data pre-evaluation is conducted at the same time, and data windows needing to be processed are screened out; adjusting infrastructure constraints to reduce the basic capability limitation of decision processing; performing hierarchical judgment on the data window marked as needing to be processed so as to optimize a decision processing level, and performing gap data processing according to a hierarchical judgment result; key data of all electric energy meters and corresponding time periods are collected and analyzed in real time, data portraits of different objects and time periods are constructed, analysis is carried out according to various data anomalies and operation states, various decision parameters are dynamically adjusted, efficient processing and decision optimization of the data of the electric energy meters are achieved, and the data processing efficiency is improved. Therefore, the problem of low accuracy in dynamic statistics and trend analysis of the acquired real-time electric energy data caused by improper decision processing of the data in the prior art is effectively solved.

The invention discloses an RDMA asynchronous communication optimization method and system based on a lock-free queue, a medium and a processor, and relates to the technical field of remote communication. The method comprises the following steps: constructing a lock-free annular buffer area at an edge node, registering the lock-free annular buffer area as an RDMA memory area, and configuring a queue and a thread pool; the collection thread concurrently writes data, and the RDMA submission thread asynchronously completes remote transmission based on a buffer area state; and the queue processing thread performs closed-loop linkage transmission and buffer area states through'batch polling-result analysis-state synchronization-exception processing ', and dynamically adjusts the buffer area and queue parameter optimization performance at the same time. The problems that an existing RDMA scheme is poor in thread cooperation, weak in resource adaptation, not timely in state linkage and the like are solved, transmission delay and CPU overhead are greatly reduced, communication stability and the resource utilization rate are improved, and the method is suitable for edge computing and other high-concurrency data interaction scenes.

The invention relates to the technical field of circuit breakers, and discloses a fast-to-install primary and secondary fusion pole-mounted circuit breaker which comprises an installation frame and a circuit breaker body arranged on the installation frame, and core power electronic components such as an insulated gate bipolar transistor (IGBT) chip and a module are integrated in the pole-mounted circuit breaker body. The mounting rack is used for mounting a circuit breaker body to realize the functions of automatically cutting off a circuit and remote communication when a fault occurs, the mounting rack comprises a clamping assembly and a supporting piece, the supporting piece is used for mounting the circuit breaker body, and the clamping assembly is used for fastening the supporting piece on a telegraph pole. According to the pole-mounted circuit breaker, assembling and wiring of the circuit breaker body are completed on the ground firstly, then the circuit breaker body is rapidly fixed to the telegraph pole through the installation frame, the effect of improving the installation efficiency and reliability of the pole-mounted circuit breaker is achieved, and meanwhile the use flexibility of the installation frame is high.

The invention provides an energy-saving compressor intelligent self-adaptive control system based on multi-sensor fusion, which belongs to the technical field of industrial compressor intelligent control and comprises a data acquisition module, a signal conditioning module, a multi-sensor information fusion module, an intelligent control decision module, an execution driving module and a system power supply management module. A state display alarm and remote communication module can be additionally arranged. Multiple sensors collect operation and environment parameters of the compressor, and after conditioning, a comprehensive state evaluation result is generated through D-S evidence theory or fuzzy logic fusion; the intelligent module generates a control instruction based on a load prediction algorithm and a fuzzy PID self-tuning strategy, and the execution module drives the compressor to act; the power supply module supports solar power supply and multi-power supply switching. The system overcomes the limitation that a traditional compressor is single in sensing, rigid in control and the like, comprehensive sensing, accurate evaluation and self-adaptive energy-saving control are achieved, the operation stability is improved, and the energy consumption and the operation and maintenance cost are reduced.

The invention provides an electric field variation measuring method and system. The method comprises the following steps: installing a differential electric field sensor in an electric field variation to-be-measured area; collecting and preprocessing electric field change data of the electric field change quantity to-be-measured area based on a differential electric field sensor; based on the preprocessed electric field change data, an electric field change quantity distribution model is established, and a data analysis result is obtained; and generating an electric field variation monitoring report based on a data analysis result. The system comprises a differential electric field sensing module which is used for capturing an electric field change signal in an electric field change quantity to-be-measured area by adopting a differential electric field sensor; the high-precision data processing unit is used for receiving and preprocessing the electric field change signal to obtain electric field change data; the remote communication module is used for realizing real-time remote transmission of electric field change data by adopting a low-power wide area network technology or a wired communication mode; and the intelligent analysis platform is used for receiving the electric field change data, performing comprehensive analysis and generating an electric field change quantity monitoring report.

The invention relates to the technical field of housekeeping robots, and discloses a housekeeping cleaning high-precision service robot control system based on multi-modal perception, and the system comprises a depth visual perception module which obtains the three-dimensional information of an environment through a binocular camera, and recognizes the positions and shapes of furniture, obstacles and other objects; the contact type pressure sensing modules are distributed on the robot cleaning part and used for sensing the contact pressure and the stress state of the surface of a cleaned object; the system comprises a control system core unit, a dynamic adjustment module and a remote communication module. According to the invention, the depth visual perception module and the contact type pressure perception module are adopted, so that environment and object information can be more comprehensively perceived. The depth visual perception module acquires environment three-dimensional information by using a binocular camera, and identifies positions and shapes of objects such as furniture and obstacles; the contact type pressure sensing modules are distributed on a robot cleaning part and used for sensing the contact pressure and the stress state of the surface of a cleaned object.

A system for latency-aware orchestration and performance optimization in AI-driven telephone communication, consisting of: a speech capture unit configured to capture an analog audio signal from a telephone interface and convert the analog audio signal into a digital audio signal stream; a feature extraction unit that is operationally coupled with the speech acquisition unit and is configured to generate a feature representation of the digital audio signal stream through spectral decomposition, noise reduction, and temporal segmentation; an AI inference processor communicatively connected to the feature extraction unit, configured to run one or more AI models for automatic speech recognition, natural language understanding, and emotion recognition on the feature representation to generate intermediate results for inference; a latency orchestration controller coupled to the AI ​​inference processor, wherein the latency orchestration controller is configured to monitor latency across multiple processing stages, predict cumulative delay propagation using a hybrid latency estimation model, and orchestrate the execution scheduling of the AI ​​inference processor based on the predicted latency deviation; a performance optimization unit coupled with the latency orchestration controller and configured to dynamically adjust computational accuracy, inference batch size, and feature processing resolution based on latency thresholds and quality constraints set by the latency orchestration controller; and a transmission synchronization array configured to time-align the processed output generated by the AI ​​inference processor and transmit it to a remote communication node, with the transmission synchronization array maintaining deterministic time coordination between successive packets and the orchestrated inference results.

The invention relates to the technical field of intelligent old-age care and health monitoring. The invention provides a tumble detection and emergency response system for the elderly at home based on multi-modal sensing fusion, and the system comprises a sensing module which is used for collecting the multi-modal data of the elderly and at least comprises a depth camera array, an inertial measurement unit, a millimeter wave radar, an audio sensor array, and a pressure sensing pad; the decision-making module is used for receiving, synchronizing and processing the multi-modal data, comprises a dynamic confidence fusion engine and is used for calculating a dynamic confidence score for the data streams acquired by the sensing module in real time and carrying out information fusion through a collaborative game algorithm based on the dynamic confidence score of each data stream to obtain a multi-modal data fusion result; generating a fall detection decision with a situation tag; and the response module is used for executing grading emergency response operation and comprises a local alarm unit, a remote communication unit and an interface unit linked with a community service and emergency center.

An orientation specific lens coupled to a light emitting device suspended above an elongated space configured to illuminate specific horizontal and vertical subfields of the elongate space, producing illumination uniformity ratios. An AI engine and remote communications assist the lighting source to serve as an intelligence egress path according to various operational conditions.

The invention discloses an insulin pump safety reminding system based on remote communication, and the system comprises an insulin pump terminal which is used for collecting equipment operation parameters, and receiving and executing a verified operation instruction; the patient monitoring terminal is bridged with a data transfer interface, a local data encryption cache interface, a graded early warning display interface and a remote man-machine interaction interface of the insulin pump terminal and the hospital comprehensive management platform; the graded authorization user terminal receives early warning information related to the insulin pump terminal, checks the state of a patient and initiates a remote operation request; the hospital comprehensive management platform is in communication connection with each terminal, manages each terminal, performs data aggregation and intelligent analysis, generates early warning information based on a multi-dimensional rule, and performs authority management and auditing and multi-source data fusion application; and the safety communication and control module is used for guaranteeing data transmission safety, operation instruction compliance and system emergency fault-tolerant operation. According to the invention, cross-time-space safety protection and active early warning can be realized, the treatment safety and management efficiency are improved, and the method is suitable for medical and pension institutions at all levels.

The invention discloses a multi-energy complementary coordination control system and coordination control method based on mixed water and light storage. The system comprises a data acquisition unit, a data storage unit, a coordination control unit, an optimization scheduling unit and a telecontrol communication unit. The data acquisition unit is in data connection with the hydropower station, the photovoltaic power station and the energy storage system; the coordination control unit is in communication connection with the data storage unit; the optimal scheduling unit is in communication connection with the coordination control unit; and the telecontrol communication unit is used for issuing the active power setting instruction generated by the coordination control unit and the optimization scheduling unit to the hybrid hydropower station, the photovoltaic power station and the battery energy storage system. According to the method, active power control with real-time performance, coordination and robustness is realized, the consumption capability of new energy is improved, and the impact of new energy access on power grid operation is relieved.

The invention discloses a projector remote control system based on the Internet of Things, and relates to the technical field of remote control of the Internet of Things, and the projector remote control system comprises a time frequency audit baseline module, a coupling feature analysis module, a causal tracking calibration module, a multi-time-scale registration module and a regulation and control dance editing module. Video sampling rates, frame phase sequences and power waveform changes of a plurality of projectors are collected under a unified time reference, a global coupling tensor is generated, and a drift map is constructed and used for forming a system-level synchronous reference. According to the method, collaborative optimization of multiple projectors in the aspects of picture consistency, electromagnetic interference suppression and remote communication stability is realized through cross-device time-frequency auditing, coupling feature analysis, causal tracking, multi-time-scale registration, dynamic regulation and control frame synchronization and energy release.

The invention discloses a payment method based on an NFC fusion channel, a terminal, a system and a medium, and belongs to the technical field of payment. The method comprises the steps of establishing a middle-long distance communication channel with a user terminal through a first middle-long distance communication module under the condition that the user terminal with a second middle-long distance communication module is sensed to enter a middle-long distance communication range of the payment terminal; a transaction confirmation instruction is sent to the user terminal through the middle and long distance communication channel; and under the condition that the user terminal confirms the transaction, transmitting APDU interaction data with the user terminal through the middle and long distance communication channel for interaction, and executing NFC payment. According to the embodiment of the invention, NFC payment between the user terminal and the payment terminal under the medium and long distance condition can be realized.

The invention relates to the technical field of data encryption, in particular to a USB multi-port equipment access encryption authentication method and system. Comprising a power supply module 100, a master control MCU unit 200, an analog signal switching unit 300, a USB expansion unit 400, a plugging detection unit 500 and a host interface unit 600, and the master control MCU unit 200 is connected with the analog signal switching unit 300, the USB expansion unit 400, the plugging detection unit 500 and the host interface unit 600 and used for achieving signal control and state management; the method does not depend on operating system permission or user behaviors, software installation is not needed, identification, authentication and control operations are completed completely through hardware, and non-bypassing performance is achieved. The problems that a traditional white list strategy is easy to bypass, needs to depend on authorization of an operating system and lacks physical isolation are effectively solved. The system supports upgrade authentication algorithms such as RSA, ECC and the like, supports a log recording function and a remote communication management module, can realize strategy adjustment through a firmware upgrade mechanism, and meets access management and control requirements of different scenes.

The invention discloses a remote communication method for a surgical robot, a storage medium and a program product, and the method comprises the steps: receiving first control data sent by a remote control end which carries out the remote control of the surgical robot in response to the starting of a remote mode; wherein the first control data is obtained by encrypting original control data by the remote control end by adopting a preset encryption algorithm; the preset encryption algorithm comprises a symmetric encryption algorithm and / or an asymmetric encryption algorithm; decrypting the first control data by adopting a target decryption algorithm corresponding to the preset encryption algorithm to obtain second control data, and determining a target response mode of the surgical robot for the second control data according to the second control data and preset control logic; wherein the preset control logic at least comprises the adjustment logic of the working state of the surgical robot, so that the transmission safety of the remote surgical data and the operation safety of the surgical robot are improved.

A motorized roller blade device for automatically urging rollerblades along a support surface includes a rollerblade and a pair of motors each integrated into a respective one of a plurality of rollers of the rollerblade. Each of the pair of motors rotates the respective roller when the pair of motors is turned on to facilitate the rollerblade to be driven along the support surface. A control unit is mounted to the boot for actuating or de-actuating each of the pair of motors. A remote control is held by the user of the rollerblade and the remote control is in remote communication with the control unit for remotely actuating or de-actuating the pair of motors to facilitate the user to remotely control the pair of motors.

The invention discloses a transformer substation secondary equipment detection method and system based on an infrared image, and relates to the field of equipment detection.The method comprises the following steps that a terminal digital model including terminal three-dimensional position coordinates, functional attributes, a temperature upper limit threshold value and a temperature lower limit threshold value is established according to equipment space distribution in a secondary screen cabinet, and a terminal digital model is established according to the terminal three-dimensional position coordinates, the functional attributes, the temperature upper limit threshold value and the temperature lower limit threshold value; carrying out equipment source positioning based on hierarchical modeling of terminal installation height parameters; configuring three task modes of periodic inspection, active trigger inspection and passive response inspection, importing the terminal inspection model into a task system, and setting a task starting time point, inspection period duration and inspection interval parameters; full-automatic and real-time detection of a secondary screen cabinet area is realized, instant threshold judgment and localization processing are performed on temperature data by means of field edge calculation, remote communication load is effectively reduced, reliability and response speed of the system are improved, and accurate and efficient online monitoring capability is provided for operation and maintenance personnel.

The present application aims to provide a method and device for executing an inspection task, and a medium. In the method of the present application, each item of an inspection task is assigned to one or more of three 'terminals', i.e., inspection personnel performing execution on site by using an augmented reality device, an inspection robot automatically performing execution on site, and / or a data analysis platform generating an analysis result on the basis of a rule engine as an execution result for invocation and feedback. The inspection personnel, the robot, and the data analysis platform are organically combined to jointly perform the inspection task, thereby greatly improving inspection efficiency, accelerating the execution speed of inspection tasks, and reducing the time for remote communication and confirmation of anomaly issues. Therefore, a collaborative mode can be achieved, in which the data analysis platform, the robot, and the inspection personnel jointly support device inspection; and by empowering humans with augmented reality to enhance efficiency, and by intelligently executing spot inspection and scheduled maintenance takes, a complete closed loop of inspection operations is established.

The invention discloses an osmotic pressure terminal dynamic acquisition awakening system and method based on water level change, and belongs to the technical field of reservoir dam safety monitoring, the osmotic pressure terminal dynamic acquisition awakening system is composed of a machine shell, a controller and a lithium battery, and the controller is integrated with an MCU module, a power management module, a 4G / LoRa communication module, a vibration excitation / vibration pickup circuit module, an analog-to-digital conversion module, an external watchdog module and other modules. By analyzing the water level data and the change rate thereof, dynamically adjusting the acquisition period, accurately capturing the water level change process and supporting multiple wake-up mechanisms such as RTC timing wake-up, remote communication wake-up and external watchdog reset wake-up, the equipment can still realize bidirectional communication and remote interrogation functions while ensuring ultra-low power consumption; the reliability, the cruising ability and the intelligent level of the equipment in a complex environment are remarkably improved, and the system is suitable for reservoir dam osmotic pressure safety monitoring scenes.

The invention discloses a remote communication method and system for an unmanned mine car, and belongs to the field of communication.The remote communication method for the unmanned mine car comprises the following steps that a three-dimensional terrain model of a mine area is constructed, and electromagnetic wave propagation path loss is calculated in real time; if it is predicted that the communication quality of the target unmanned mine car is possibly lower than a threshold value due to terrain shielding after the dynamic time threshold value T, a direct communication mode is changed into an intermediate communication mode; screening relay nodes from other unmanned mine cars; compared with the prior art, the method has the advantages that the communication mode is changed in advance by judging whether the communication quality of the unmanned mine car is lower than the threshold value possibly due to terrain shielding or not in advance, the direct communication mode is changed into the intermediate communication mode, and after it is confirmed that the terrain shielding risk is relieved and the communication quality is judged, the communication mode is changed into the intermediate communication mode. An intermediate communication mode is changed into a direct communication mode, so that the unmanned mine car always keeps good communication quality and always works normally.

The present disclosure may propose a method for transmitting / receiving a physical protocol data unit (PPDU) with an improved structure and a device related thereto. A station (STA) related to the present specification may generate an ELR PPDU including a data field. The ELR PPDU may comprise: a legacy signal (L-SIG) field including information related to the length of the ELR PPDU; and a universal signal (U-SIG) field including information for interpreting the ELR PPDU. For example, the ELR PPDU may further include a first repeated L-SIG field and a second repeated L-SIG field, which are repetitions of the L-SIG field. For example, the U-SIG field may include a first U-SIG part and a second U-SIG part. For example, the ELR PPDU may further include a first repeated U-SIG part and a second repeated U-SIG part, which are repetitions of the first U-SIG part. For example, the ELR PPDU may further include a third repeated U-SIG field and a fourth repeated U-SIG field, which are repetitions of the second U-SIG part.