27 results about "Broadcast packet" patented technology

A low-power Bluetooth key control method and system based on multimodal perception, relating to the field of Bluetooth keys, is disclosed. The method includes: The vehicle end determines the parking environment type using multi-source sensor data such as GPS signal strength, ambient light intensity, and the number of nearby Bluetooth devices, encoding this data into an environment identification code. This code, along with vehicle status information such as door lock status and the last unlock timestamp, is encapsulated in a Bluetooth broadcast packet and broadcast. The key end receives and parses the environment identification code, retrieving the corresponding target weight vector (including RSSI, motion state, and ranging accuracy weight coefficients) from a pre-stored database. The key end collects multi-dimensional feature parameters such as the current RSSI value, motion state, and CS ranging distance value, calculating the RSSI matching score, motion matching score, and ranging reliability score respectively. These are then combined with the target weight vector to calculate the unlock confidence score. A tiered unlocking strategy is executed based on the score's range. Implementing this method can improve the accuracy of Bluetooth car key unlocking judgment.

This application relates to the field of IoT smart devices and provides a method for linking a pet collar and a feeder. The method includes: controlling the pet collar as a Bluetooth beacon to broadcast data packets with a preset transmission power and preset period; controlling the feeder to initiate Bluetooth passive scanning, listening to the broadcast channel according to preset scanning parameters, and performing format filtering and signal strength value threshold filtering after receiving data packets; storing the media access control address, signal strength value, and timestamp of the corresponding pet collar into a local fixed-capacity circular buffer queue after the format filtering and threshold filtering are passed; controlling the feeder to perform verification at a preset period, clearing historical data exceeding a preset valid duration in the circular buffer queue; when all data corresponding to the pet collar in the circular buffer queue is cleared, determining that the pet has left the area, reporting a record containing the corresponding media access control address, current UTC, and cumulative presence time, and triggering a preset linkage action.

The application provides a kind of unmanned plane anonymous authentication and identity remote identification method, unmanned plane and its supervision equipment, the method includes: by unmanned plane service provider in advance selecting system main private key and main public key, define attribute set;And by unmanned plane registration process, generate and issue certificate for the unmanned plane;Unmanned plane running process, generate RID data packet that can be anonymous authentication and meet RID rule;RID data packet includes the following information: unmanned plane position, unmanned plane speed, unmanned plane attribute ciphertext, unmanned plane operator's location ciphertext, encrypted unmanned plane public key information, time stamp, group signature;Timing broadcast RID data packet, so that receiver obtains the position and flight speed of unmanned plane according to the received RID data packet. Utilize the scheme of the application, the effective management and privacy protection of unmanned plane can be realized.

This system enables stable communication between devices that do not have the functionality to simultaneously send and scan advertisement packets, even if the peripheral and central roles are not predetermined. [Solution] The electronic device includes a control unit 110 that, when establishing a communication connection via BLE, performs a first operation which involves repeatedly sending an advertisement packet and scanning for advertisement packets at a set interval, acquires first information by a first method which is capable of obtaining different values ​​for each device, and changes the interval of the first operation based on the first information while the first operation is being performed.

System and method for reduced latency control of IoT devices. For example, one embodiment of a method comprises: associating a control device with one or more internet of things (IoT) devices, the control device including a wireless interface supporting broadcast messages over advertising channels and the one or more IoT devices including wireless interfaces supporting listening for the broadcast messages over the advertising channels; generating an advertising packet including an indication of an operation to be performed by the one or more IoT devices and generating a signature with a control device key; receiving the advertising packet at an IoT device of the one or more IoT devices; validating the signature using an IoT device key corresponding to the control device key; and performing the operation by the IoT device.

The application belongs to the technical field of communication, and particularly relates to a kind of implementation methods of multi-person ad hoc network intercom based on Bluetooth, comprising the following steps: initiating a networking request by a networking device; in a broadcast or scanning manner, the networking device sends a broadcast data packet to surrounding devices and continuously scans surrounding devices; screening devices whose parameters meet preset connection conditions as target networking devices; establishing a communication channel connection between the networking device and the target networking device, wherein the communication channel comprises a data transmission channel and a voice transmission channel; using a connection quality evaluation mechanism to evaluate the connection quality of the communication channel, generate an evaluation result, and adjust the connection of networking according to the evaluation result; through innovative device discovery and connection strategy, efficient networking protocol and topology structure, optimized voice transmission quality and dynamic connection management and optimization, the scheme can meet the needs of convenient, efficient and high-quality multi-person real-time intercom.

The application provides a shared electric bicycle battery compartment lock unlocking method and device, and the method comprises the following steps: receiving a Bluetooth low energy (BLE) broadcast packet sent by a mobile terminal, wherein the BLE broadcast packet is a connectionless broadcast packet; extracting a short-time valid Token in the BLE broadcast packet, and performing local authentication verification on the short-time valid Token, wherein the short-time valid Token is generated based on cloud authorization; in the case that the local authentication verification is passed, performing near-field trigger verification on the BLE broadcast packet based on a preset signal strength threshold, a preset time window and a preset broadcast packet quantity threshold; and in the case that the near-field trigger verification is passed, controlling to open the battery compartment lock of the shared electric bicycle. Through the connectionless broadcast and the local authentication, the application avoids a complicated Bluetooth connection process, and significantly improves the unlocking response speed; meanwhile, in combination with the near-field trigger verification, the application can effectively prevent remote mis-unlocking and malicious attacks, improves the operation and maintenance efficiency, and guarantees the safety of vehicle assets.

This invention discloses a device association access management method and system for smart homes, relating to the field of communication management technology. The method includes the following steps: broadcast conflict interference determination, device access optimization management, and device access request verification. By tracking the transmission process of broadcast packets from devices seeking access, this invention can accurately identify broadcast conflict interference during the access process, providing a basis for decision-making regarding whether subsequent access strategy optimization is needed. This effectively avoids potential communication conflicts during device access, reducing the risk of access failure at the source. Based on this, it determines whether to adopt a device access optimization management strategy. If so, the access scanning process is initialized after adopting the strategy; otherwise, broadcast packet reception tracking is performed, effectively reducing broadcast conflict interference during device access and improving the access success rate. Finally, device access verification configuration further enhances the reliability of device access.

This invention provides an emergency rescue positioning system, method, building, and computer-readable storage medium. The emergency rescue positioning system includes: a central controller; multiple fire alarm detectors, each including a positioning base station, the positioning base stations being connected to the central controller via a first communication link; multiple positioning terminals, connected to the positioning base stations via a second communication link, the second communication link being different from the first communication link; the positioning base stations sending positioning broadcast packets; the positioning terminals receiving the positioning broadcast packets and sending positioning requests and authentication signals; the positioning base stations receiving and responding to the positioning requests and authentication signals during a reception time slice, and reporting the positioning terminal information to the central controller after authentication; the positioning base stations determining the distance between themselves and the positioning terminals and reporting the distance to the central controller; the central controller determining the location of the positioning terminals based on the multiple distances. This invention can meet the reliable communication requirements in emergency scenarios, achieving low-cost, high-reliability terminal positioning.

This application discloses a multi-robot voice command response method and system. The method includes: a first robot responding to a user's voice command by acquiring a first environmental image and determining the location of a first user; creating a first broadcast data packet based on the first user's location, the first robot's local state information, and the first environmental image; receiving second broadcast data packets from other robots to obtain multiple broadcast data packets; obtaining a target robot number based on the multiple broadcast data packets, the user's voice command, the historical dialogue record between the first robot and the first user in the current dialogue cycle, and an attribution robot determination model; and continuing to respond to the service request indicated by the user's voice command when a matching number is detected. This application can effectively avoid multi-robot competitive response conflicts and improve the accuracy and intelligence of multi-robot voice command response.

The application provides a vehicle networking method, device and equipment based on Bluetooth wireless networking and a medium, the method comprising the following steps: after obtaining user access demand of a to-be-connected wireless access device, listening to a Bluetooth signal of the to-be-connected wireless access device, receiving a new device binding broadcast packet based on the Bluetooth signal, generating a user confirmation page to prompt the user to confirm the to-be-connected wireless access device, receiving user access confirmation information, performing target binding on the to-be-connected wireless access device according to the device binding broadcast packet and the user access confirmation information, obtaining a target binding state, obtaining a device configuration file according to the target binding state and the device binding broadcast packet, and displaying an initial control page of the to-be-connected wireless access device based on the device configuration file; the number of to-be-connected wireless access devices that can be accessed is increased through the access number of Bluetooth wireless networking, and unified management and control can be performed, without the need to install multiple device applications of the to-be-connected wireless access device, thereby improving user experience.

The application discloses a kind of vital sign data monitoring system and method.The vital sign data monitoring system includes data acquisition terminal, mobile terminal device, receiving device and multiple wireless relay units;Data acquisition terminal is arranged in radiotherapy room and is wirelessly connected with mobile terminal device, for acquiring the vital sign data of user and sending vital sign data to mobile terminal device;Mobile terminal device is used to process vital sign data to obtain broadcast data packet and broadcast broadcast data packet to surrounding;Multiple wireless relay units are respectively arranged at the physical corner of radiotherapy room and protection corridor, for forwarding received broadcast data packet in the form of flooding routing;Receiving device is arranged in outdoor control area, for receiving and processing broadcast data packet, to output vital sign data.In the present application, vital sign data can be effectively transmitted from treatment room to outdoor control area, reducing the occurrence of packet loss and the like.

The application discloses a kind of mobile control terminal, comprising: one or more touch modules, touch module is used to generate control instruction, control instruction can trigger air conditioning equipment to perform pre-configured operation;Bluetooth low power consumption module, bluetooth low power consumption module can work in broadcast mode, continuously send broadcast packet including control instruction;Wherein, broadcast packet is received and parsed by distributed control system in communication range;Distributed control system includes communication connected control device;Distributed control system is based on the signal intensity filtered and sorted based on parsed, selects target control device from it and sends target identification;Target control device sends the control instruction received from broadcast packet to the air conditioning equipment connected with communication;Also provide a kind of control device and a kind of air conditioning system.This application does not need to be matched, also does not need to be used in straight line unobstructed environment, and energy consumption is extremely low, battery dependency is low.

A method for advertising a Bluetooth Low Energy (BLE) peripheral device is provided. The method may include partially powering up a processing circuit of the BLE peripheral device to enter an advertising mode, transmitting an initial advertising packet, receiving a response to the initial advertising packet from a BLE central device, the response including a predetermined time, determining whether the full power-up time required to complete the power-up of the processing circuit is greater than the predetermined time, and, in response to a determination that the full power-up time is not greater than the predetermined time, completing the power-up of the processing circuit.

The application provides a Bluetooth wake-up method, device and storage medium, and relates to the technical field of terminals.In the application scheme, the BLE wake-up end can broadcast multiple cyclic wake-up frames in one BLE broadcast packet, and each wake-up frame at least includes a channel estimation part and a trigger sequence.The BLE woken end can scan at preset time intervals to determine whether the channel estimation part passes detection.Once the BLE woken end detects that the channel estimation part passes detection, the trigger sequence is continued to be captured, and it is determined whether the trigger sequence passes verification.After the trigger sequence passes verification, the connection is re-established.Based on the multiple cyclic wake-up frames of the BLE broadcast packet and the design of a lower duty cycle, the power consumption of the BLE wake-up end and the BLE woken end is reduced.Because the BLE woken end can receive a complete wake-up frame in one BLE broadcast packet, the wake-up delay of the scheme is less than the time length of one BLE broadcast packet, and the device discovery and connection speed is improved.

The application relates to the fields of earthquake early warning and Internet of Things, and discloses a router device and system with earthquake early warning and broadcast alarm, wherein the device comprises a router body, a main control processor, a LoRa module, a MEMS sensor, a buzzer, an indicator light and the like, and the system comprises early warning information receiving, emergency network management, distributed sensing, cross verification and decision and local device linkage modules. The early warning receiving module obtains early warning information through the Internet and the LoRa module, the emergency network module constructs a mesh network, manages nodes and routes emergency broadcast packets, the distributed sensing module collects vibration data, generates environmental noise fingerprints, constructs a regional dynamic baseline, the cross verification module verifies the validity of early warning, drives sound and light alarms, and the local linkage module links local area network devices through UDP broadcast or control. The application improves the reliability, accuracy and response speed of early warning through multi-path, emergency mesh network and dynamic baseline physical verification.

This invention relates to the field of IoT near-field identification technology, specifically disclosing a cross-platform Bluetooth identity recognition broadcast scanning optimization method and system. The method includes the following steps: S1, constructing broadcast packets using AD Structure format, the broadcast packets including basic AD fields and manufacturer-defined data fields; S2, automatically loading corresponding scanning parameter sets, customizing scanning parameters for different mobile phone systems and manufacturers to dynamically optimize the scanning strategy; S3, processing invalid broadcast packets through a three-level filtering mechanism; S4, dynamically adjusting the broadcast interval based on the interaction status between the device and the mobile phone and the system platform, reducing power consumption while ensuring recognition sensitivity. This invention, employing the above-mentioned cross-platform Bluetooth identity recognition broadcast scanning optimization method and system, can improve cross-platform recognition rate, increase response time, and effectively adapt to the needs of multiple scenarios such as shared devices and smart homes, possessing high practicality and promotional value.

The invention is suitable for the technical field of industrial automation control, and provides a PLC configuration-free method and system based on automatic discovery and topology identification, terminal equipment and a storage medium, and the method comprises the steps: obtaining an industrial control equipment broadcast packet when it is monitored that a network comprises the industrial control equipment broadcast packet; establishing communication connection with the industrial control equipment according to the industrial control equipment broadcast packet; obtaining topological data sent by the industrial control equipment; wherein the topological data is hardware topological relation data generated by the industrial control equipment according to the acquired hardware connection information between the industrial control equipment and the slave equipment and the identity identification data of the industrial control equipment. And creating corresponding hardware configuration according to the topological data. According to the method, automatic identification, automatic pairing, automatic configuration and automatic program synchronization between the PLC and the upper computer and between the PLC and the extension equipment are realized, the operation of engineers is greatly simplified, and real plug and play is realized.

The application relates to the technical field of Internet of Things and public health epidemic prevention, and discloses an infectious disease contactor tracking and risk early warning system based on Internet of Things, which runs on a terminal comprising an inertial measurement unit, a temperature and pressure sensor and an audio envelope circuit, and comprises the following modules: a sensor scheduling module, which acquires a radio frequency broadcast packet and motion data to generate a hardware interrupt signal; a central coordination processor, which responds to the interrupt to control the temperature and pressure sensor and the audio envelope circuit to switch states; a data preprocessing module, which extracts low-frequency air pressure and high-frequency acoustic signals; a baseline module, which performs time alignment on the signals to generate a macro baseline; a connectivity decision module, which performs physical isolation decision based on the macro baseline to generate a connectivity flag bit; and a risk score module, which combines the motion data, the radio frequency broadcast packet and the flag bit to calculate a risk index to trigger early warning. The application reduces power consumption through state machine scheduling, uses air pressure and acoustic characteristics to exclude physical barrier interference, and realizes fine and high-precision evaluation.

This invention discloses an intelligent configuration management system for electrical interlock boxes in switchgear. This invention relates to the field of switchgear configuration technology and solves the technical problems of low design efficiency, reliance on manual experience, high debugging risks, and lack of verification methods. Through a pre-built electrical component library, each component contains a three-layer data structure: a view layer, an attribute layer, and a rule layer. When a user drags and drops to draw a main wiring diagram, the system can automatically identify and highlight legitimate ports based on the rule layer, displaying a red prohibition symbol and rejecting illegal connections, thus eliminating topology connection errors at the source. By sending device discovery broadcast packets through a communication gateway, a physical device resource pool is automatically constructed. A mapping recommendation engine is used to automatically retrieve candidate channels that meet conditions such as type matching, rule library matching, and priority within the same cabinet based on topology semantic tags, pre-filling the optimal channel into the configuration items, improving configuration efficiency and eliminating human error.

The application provides a Bluetooth wake-up method, device and storage medium, and relates to the technical field of terminals.In the application scheme, the BLE wake-up end is configured as a low-power wake-up transmission mode, and the BLE wake-up end can cyclically wake up a sequence multiple times in one BLE broadcast packet.The BLE wake-up end is configured as a low-power wake-up channel detection mode, and the BLE wake-up end can detect whether information is transmitted in a broadcast channel according to a lower duty cycle based on the length of the wake-up sequence.Once the BLE wake-up end detects that information is transmitted in the broadcast channel, the BLE wake-up end is switched to a wake-up sequence receiving mode and receives the wake-up sequence.Based on the multiple cyclic wake-up sequences of the BLE broadcast packet and the lower duty cycle design, the application scheme reduces the power consumption of the BLE wake-up end and the BLE wake-up end.Because the BLE wake-up end can receive a complete wake-up sequence in one BLE broadcast packet, the wake-up delay of the application scheme is less than the transmission length of one BLE broadcast packet, so that the device discovery and connection speed is improved.

This invention relates to the field of display module technology and discloses a wireless multi-card synchronous control method for display modules and a display screen. The method includes: acquiring a first frame timestamp through a master control card and encapsulating the first frame timestamp into a frame synchronization broadcast packet for wireless broadcast within the time slot corresponding to the dedicated transmission time slot offset; acquiring a second frame timestamp through multiple slave control cards and performing step correction on the first local frame period until the frame phase error converges to within the phase-locked steady-state threshold to obtain the second local frame period; each slave control card drives its subordinate display module with the second local frame period, and the master control card reports the frame phase-locked state status response packet according to the time slot corresponding to the dedicated transmission time slot offset of each slave control card. This invention ensures that the entire network continuously maintains phase-locked steady state under dynamic disturbances, thereby realizing reliable wireless synchronous refresh control of large-scale multi-card display modules without external synchronization cables.

A method for controlling a tag to send a broadcast packet includes a first tag sending a broadcast packet at a default transmission rate and / or a default transmission power and / or a default packet size, monitoring movement of the first tag, the first tag receiving a setting for transmission power and / or transmission rate and / or packet size, adjusting transmission power and / or transmission rate and / or packet size of the first tag according to the received setting for the transmission power and / or the transmission rate and / or the packet size, and adjusting transmission power and / or transmission rate and / or packet size of the first tag to default settings if movement of the first tag is detected.

The application discloses a network configuration method and device of an image forming device, the image forming device, a terminal and a medium. The network configuration method comprises the following steps: in response to a first indication signal, performing a function of receiving a broadcast packet sent by a terminal, establishing a Bluetooth connection with the terminal according to the received broadcast packet, receiving configuration parameters of a target access point sent by the terminal, and attempting to establish a connection with the target access point according to the configuration parameters of the target access point. The image forming device of the application starts the Bluetooth scanning function only after responding to the first indication signal, thereby saving energy consumption and avoiding the influence of the network configuration process caused by the image forming device receiving interference data packets in a complex communication environment.