238 results about "Broadcast packet" patented technology

Systems and methods are described for transmitting broadcasts by Peripherals, receiving the broadcasts by Centrals, and communicating with a Backend by Centrals. Specifically, a Peripheral may generate and transmit an encrypted broadcast packet to a Central, the Central may transmit the encrypted observation information to the Backend, which may decrypt the broadcast packet. Additionally, a Central may transmit a request for authorization to connect to a Peripheral to the Backend. If authorized by the Backend, the Central may connect to the Peripheral. Further, a Central may receive a plurality of broadcasts over a period of time. The Central may store information about the broadcasts and, at the conclusion of the period of time, transmit the information about the broadcasts and the last-received broadcast to the Backend.

The invention discloses a method, a system, equipment and a medium for constructing a special area ad hoc network for a small hydropower station in a mountainous area, and relates to the technical field of area ad hoc networks, and the method comprises the steps: selecting an initial node in the small hydropower station as a network initiating node, setting the initial node as a backbone node after starting, and starting a broadcast control signaling to form a virtual backbone network; other nodes enter a non-network-access state after being started, periodically send a state broadcast packet to search the backbone node, and if the backbone node is detected, complete network access authentication and join the network to become a non-backbone node; non-backbone nodes joining the network enter an active state in a preset period so as to assist other nodes which do not access the network to complete search and access; and when the network topology changes, the connection of the virtual backbone link is kept through a bridging mechanism. According to the method, the virtual backbone communication network with the characteristics of high reliability, high expandability and low energy consumption can be quickly constructed in a complex mountain environment which lacks public network coverage and is unstable in communication link.

The invention discloses an electronic equipment audio broadcasting adaptation system and method based on an Auracast technology, and relates to the technical field of audio broadcasting. An Auracast transceiver enters a receiving mode: detecting an input source and determining a sound source input mode, collecting an audio signal based on the input source, processing the audio signal and packaging the audio signal into a broadcast packet; the Auracast transceiver enters a transmitting mode: configuring broadcast parameters, and circularly sending a broadcast packet through a Bluetooth LEAudio protocol; and the Auracast transceiver sends the broadcast packet to all receiving ends supporting Auracast function reception in the broadcast coverage range of the Auracast transceiver. The method supports a one-to-many broadcast mode, and the transmitting end can transmit the audio streams to an infinite number of receiving devices at the same time without independently pairing each device. A receiving end can receive signals only by scanning and adding a broadcast group, and the method is suitable for scenes requiring large-scale equipment synchronization.

The invention provides a Bluetooth wake-up method and device and a storage medium, and relates to the technical field of terminals. In the scheme of the invention, the BLE wake-up end is configured to be in a low-power-consumption wake-up sending mode, and the BLE wake-up end can circularly wake up the sequence for multiple times in one BLE broadcast packet. The awakened end of the BLE is configured to be in a low-power-consumption awakening channel detection mode, and the awakened end of the BLE can detect whether information is sent in a broadcast channel or not according to a relatively low duty ratio based on the duration design of an awakening sequence. Once the awakened end of the BLE detects that information is sent in the broadcast channel, the awakening sequence receiving mode is switched to, and the awakening sequence is received. Based on the multi-cycle wake-up sequence of the BLE broadcast packet and the design of a relatively low duty ratio, the scheme reduces the power consumption of the BLE wake-up end and the BLE wake-up end. The awakened end of the BLE can receive the complete awakening sequence in one BLE broadcast packet, so that the awakening delay of the scheme is less than the transmission duration of one BLE broadcast packet, and the equipment discovery and connection establishment speed is improved.

The invention provides a Bluetooth wake-up method and device and a storage medium, and relates to the technical field of terminals. In the scheme of the invention, a BLE (Bluetooth Low Energy) wake-up end can broadcast a plurality of cyclic wake-up frames in a BLE broadcast packet, and each wake-up frame at least comprises a channel estimation part and a trigger sequence. The awakened end of the BLE can scan according to a preset time interval so as to judge whether the channel estimation part passes the detection or not. Once the awakened end of the BLE detects that the channel estimation part passes the detection, the triggering sequence continues to be captured, and whether the triggering sequence passes the verification is judged. And after the trigger sequence passes the verification, reestablishing the connection. The power consumption of the BLE awakening end and the BLE awakened end is reduced based on the design of multiple cyclic awakening frames of the BLE broadcast packet and a relatively low duty ratio. The awakened end of the BLE can receive a complete awakening frame in one BLE broadcast packet, so that the awakening time delay of the scheme is less than the time length of one BLE broadcast packet, and the equipment discovery and connection establishment speed is improved.

The invention belongs to the technical field of communication, and particularly relates to a Bluetooth-based multi-user ad hoc network talkback implementation method, which comprises the following steps that: equipment to be networked initiates a networking request; the to-be-networked device sends a broadcast data packet to the surrounding device in a broadcast or scanning mode, and continuously scans the surrounding device; screening the equipment of which the parameters of the surrounding equipment accord with a preset connection condition as target networking equipment; establishing a communication channel connection between the to-be-networked device and the target networking device, wherein the communication channel comprises a data transmission channel and a voice transmission channel; performing connection quality evaluation on the communication channel by adopting a connection quality evaluation mechanism, generating an evaluation result, and adjusting networking connection according to the evaluation result; according to the scheme, through an innovative equipment discovery and connection strategy, an efficient networking protocol and topological structure, optimized voice transmission quality and dynamic connection management and optimization, the convenient, efficient and high-quality requirements of multi-person real-time intercom communication can be met.

A topology information update method includes a first node that sends a first packet in a broadcast manner, receives a second packet from a second node, where the second packet is a broadcast packet, and the first packet and the second packet each carry an identity identifier, a topology identifier, and a synchronization radius identifier that are of the respective node. The first node determines, based on the first packet and the second packet, whether the first node and the second node need to synchronize topology information.

The invention discloses a device control method and system, and the method comprises the steps: transmitting a pairing broadcast packet to a terminal device, enabling the terminal device to carry out the pairing according to the pairing broadcast packet, and enabling the pairing broadcast packet to comprise an access control address, a message sequence field, a target secret key, and a pairing packet check code; generating a control data packet according to the target control information corresponding to the controlled terminal, the data survival time, the access control address, the message sequence field and the control packet check code; and sending the control data packet to the controlled terminal, and performing one-way control on the controlled terminal through the control data packet. Through the above mode, the complex handshake process of traditional Bluetooth networking is replaced by introducing the pairing broadcast packet of the MAC address, the SEQ, the target secret key and the check code, the network distribution process is significantly simplified, the network distribution time is shortened, the network distribution efficiency is improved, a one-way control mechanism is adopted, a two-way confirmation link is omitted, and the network distribution efficiency is improved. The communication delay is reduced; and the control efficiency is improved.

The invention discloses a device and a method for accurately detecting mobile equipment based on Bluetooth features, and the method comprises the steps: carrying out the signal capture of the mobile equipment through an existing Bluetooth communication protocol in the mobile equipment; basic verification and deduplication are carried out on the captured Bluetooth data, and accurate timestamps and received signal strength (RSSI) information are given to the data; filtering a data organization unique identifier (OUI) in a broadcast packet of the mobile device in real time; analyzing a specific field in a broadcast packet of the mobile equipment, and identifying a specific broadcast mode of the type equipment; a dynamic fingerprint database is constructed, and a false alarm firewall is formed by associating a signal intensity curve with broadcast interval stability; if the same fingerprint is captured in three continuous scanning periods and the signal intensity is greater than a preset value, triggering existence judgment; according to the invention, through mutual cooperation of the modules, zero-interaction passive monitoring of the mobile device is realized, the identification precision is high, and the false alarm rate is extremely low.

A wireless communication method includes: obtaining subnet information of a first subnet corresponding to a first session; receiving a data packet, where the data packet is a multicast packet or a broadcast packet; determining, based on the subnet information, that the data packet corresponds to the first session in the first subnet; and sending the data packet via the first session.

The invention discloses a low-power-consumption adaptive broadcast adjustment method and system, and the method comprises the steps: building a physical model based on the physical characteristics of equipment, and simulating the influence of a broadcast interval and a scanning interval on energy consumption and connection time delay; generating a training data set based on the physical model, and training a proxy prediction model, so as to predict an optimal broadcast interval and a scanning interval according to the service priority, the electric quantity state, the connection time period and the environment equipment density; monitoring the operation state of the equipment, and correcting the input parameters of the proxy prediction model according to the battery attenuation factor and the antenna aging factor; triggering the updating of the proxy prediction model according to the broadcast packet loss rate and the electric quantity change; the connection time period is predicted based on the historical connection data, the input weight of the proxy prediction model is adjusted to adapt to different connection load scenes, and the connection reliability and scene adaptability are improved.

The invention relates to a multi-terminal offline media synchronous playing method and system in a local area network. The multi-terminal offline media synchronous playing method in the local area network comprises the following steps: performing master-slave election on all terminals, and confirming a master device and a plurality of slave devices; performing clock synchronization on the master device and all the slave devices; packaging the synchronized playing progress of the master device to form a master device broadcast data packet, and sending the master device broadcast data packet to all slave devices; after the slave device analyzes the time delay and play delay, time delay and play delay are calculated respectively, and network time delay and progress errors are obtained; whether the absolute value progress error of the current slave device exceeds an error threshold value or not is judged; if not, the master device continues to broadcast the data packet; and if yes, pre-estimated target frame correction is carried out on the slave device, and playing progress synchronization of the slave device is completed. According to the multi-terminal off-line media synchronous playing method in the local area network, the dependence of the server is effectively reduced, and the playing progress synchronization precision is remarkably improved.

The invention belongs to the technical field of ultra-short wave communication, and particularly relates to a routing method of a high-speed mobile node based on an ST-GPSR protocol, which comprises the following steps: constructing an ultra-short wave communication network consisting of a high-speed mobile node and a base station; gathering all high-speed mobile nodes of the ultra-short wave communication network; periodically broadcasting a HELLO data packet by each high-speed mobile node in the high-speed mobile node set, and constructing a neighbor list according to the HELLO data packet; screening each node in the neighbor list by adopting an ST-GPSR protocol to obtain a candidate node set; constructing a credibility function, screening out an optimal node from the candidate node set through the credibility function, and carrying out routing; according to the method, factors of node link survival time and forwarding deflection angle are comprehensively considered, and in the process of selecting the next hop, the data transmission efficiency is ensured, and the link connection stability is improved.

This application provides a method and device for achieving fast traffic convergence. The method includes: selecting a primary next hop and a backup next hop from multiple next hops in a VXLAN tunnel based on the device type; setting the primary next hop to a forwarding state and the backup next hop to a discard state in the multicast table entry of the VXLAN tunnel; registering a port close event for the VXLAN tunnel; forwarding broadcast packets, unknown unicast packets, and multicast packets within the virtual forwarding instance through the primary next hop of the VXLAN tunnel; and when a port close event is received from the outgoing port of the primary next hop, setting the primary next hop to a discard state and setting the backup next hop to a forwarding state.

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.

The invention discloses an identity recognition information generation method and device of Bluetooth equipment and electronic equipment, and relates to the technical field of electromagnetic supervision safety, and the method comprises the steps: determining a broadcast event interval and an interval type according to a timestamp sequence of a broadcast packet; determining a broadcast event interval parameter, a broadcast delay generation parameter and a time drift value according to the broadcast event interval and the jump discontinuity point in the interval category; and obtaining the identity recognition information of the Bluetooth equipment by combining the parameters. The problems that identity recognition information generated according to load information is prone to failure or counterfeiting and poor in safety, and identity recognition information generated according to the characteristics of data packet signals is low in accuracy and poor in stability can be solved. According to the method, broadcast event interval parameters are extracted from an application layer, broadcast delay generation parameters are extracted from a protocol layer, time drift values are extracted from a hardware layer, cross-layer fingerprints are jointly formed to serve as identity recognition information, the identity recognition information has long-term stability, and accurate, stable and repeatable recognition can be conducted on Bluetooth equipment.

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.

The embodiment of the invention discloses a mobile terminal and a communication method thereof, a communication network architecture and a communication system, and the mobile terminal obtains an initial message packet, and carries out data transmission channel decision according to the transmission demand of the initial message packet. And packaging the initial message packet into a general protocol data packet and / or a broadcast data packet according to a decision result, and sending the general protocol data packet and / or the broadcast data packet by adopting a corresponding data transmission channel. Therefore, according to the embodiment of the invention, the communication protocol architecture of the mobile terminal supports the general protocol transmission channel and the broadcast transmission channel, so that the data transmission delay can be reduced by adopting the broadcast transmission channel or dual-channel transmission data; when the requirement for transmission reliability is high, double-channel data transmission can be adopted to ensure the reliability and stability of data transmission.

This invention discloses a method, apparatus, and system for sending broadcast data packets longer than a preset length to a group. The method includes: when there are broadcast data packets longer than a preset length to be sent to the group, splitting the broadcast data packets to be sent into multiple sub-data packets; determining the number of transmission time slot groups required to send the broadcast data packets to be sent; dividing the sub-data packets into multiple subgroups according to the number of groups; a transmission synchronization frame in one cycle includes one set of transmission time slots, each time slot accommodating one subgroup of data packets; all sub-data packets contained in all time slots corresponding to each data packet to be sent constitute one set of data packets; sending a synchronization frame header indication packet for that set at the beginning of each transmission time slot, indicating that multiple sub-data packets will be sent consecutively thereafter; and sending the sub-data packets to the group within the time slots of different subgroups corresponding to each cycle. This invention can efficiently send broadcast data packets longer than a preset length to a group in high-density wireless communication scenarios.

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.

This application provides a method and device for proxying and forwarding ring network data packets. The method includes: setting up two RPR ports connected to an adjacent node in the RPR ring network and a proxy RPR port connected to a proxy node via a direct RPR link for an RPR logical port; when the collected RPR ring network topology does not include a proxy node, announcing the proxy node to other nodes in the current RPR ring network topology; announcing the nodes in the current RPR ring network topology to the proxy node via the direct RPR link; recording the outgoing interface of the proxy node in the RPR ring selection table as a proxy RPR port; updating the outgoing interface of the RPR broadcast table to the normal RPR port and the proxy RPR port; and based on the updated RPR broadcast table, sending the first RPR broadcast packets forwarded on the ring by each node other than the proxy node to the proxy node through the RPR proxy port.

The invention relates to the technical field of low-power-consumption temperature anomaly alarm based on wireless communication, and discloses a low-power-consumption temperature anomaly alarm method and device based on wireless communication and a medium, and the method comprises the steps: collecting temperature data of a plurality of time points, generating a target feature based on a preset feature extraction method, the method achieves the comprehensive judgment of the key characteristics, such as the temperature trend and the change rate, can remarkably improve the alarm accuracy compared with a conventional single-point threshold value method, and generates a broadcast packet and executes Bluetooth low-power-consumption broadcast when the target characteristic reaches the alarm threshold value. The method has the beneficial effects that the alarm can be completed without maintaining Bluetooth connection, so that the problem of high power consumption caused by continuous connection in a traditional scheme is thoroughly solved, and the equipment can still quickly give out a temperature abnormity alarm under the condition that a mobile phone is not on the scene or the connection is disconnected.

The present application provides a method and system for two-layer network configuration in a full-mesh network. By issuing the first, second, and third broadcast rules, when broadcast packets, multicast packets, and unknown unicast packets enter the first-hop forwarding device, the default broadcast mechanism is executed by matching the first broadcast rule; when broadcast packets and multicast packets enter the second-hop forwarding device, the second broadcast rule with a higher priority is matched and executed to broadcast the broadcast packets and multicast packets to the access ports of the second-hop forwarding device, which can prevent the packets from being sent to other forwarding devices; when a unicast packet enters the second-hop forwarding device, if the lookup in the two-layer forwarding table fails, the third broadcast rule with a higher priority is matched and executed to broadcast the unknown unicast packet to the access ports of the second-hop forwarding device, which can prevent the packet from being sent to other forwarding devices. The present application can effectively reduce the generation of forwarding loops in the two-layer network configuration of a full-mesh network and make full use of its high-density links.

The present application discloses a real-time rowing data acquisition system, which relates to the technical field of data acquisition. It includes a main controller for sending SYN synchronization packets containing a time base to a relay device at a first time interval; a relay device for synchronizing the time of the main controller and the relay device according to the time base, and returning PACK packets containing data collected by the data acquisition device to the main controller at a second time interval, and at the same time sending WSYN broadcast packets containing the time base to the data acquisition device; and a data acquisition device for synchronizing the time of the relay device and the data acquisition device according to the time base, and repeatedly sending WPACK data packets containing the collected data to the relay device through a preset plurality of channels in turn. The application has a light weight and can be deployed on a low-cost MCU solution. At the same time, it has a stable and reliable physical layer and a flexible and convenient wireless communication method. At the same time, time synchronization and data transmission are achieved through time division multiplexing and time division frequency division multiplexing, and it has strong anti-interference ability.

The invention relates to a lighting control method and device for safe production, equipment and a medium, and the method comprises the steps: carrying out the network access configuration of each lighting equipment as a node, so as to construct a Mesh network, and building the bidirectional communication between the Mesh network and a terminal; the Mesh network obtains sensing data in the node area through a built-in sensor of the lighting equipment, and uploads the sensing data to the terminal; the terminal presets a first function strategy of the target lighting equipment, generates a function instruction corresponding to a second function strategy based on the received sensing data, and issues the function instruction to the Mesh network, the function instruction comprising at least one function of lighting control or safety early warning; a first node in the Mesh network receives a packaged broadcast packet containing a function instruction, the packaged broadcast packet is a broadcast packet sent by an agent node and / or a second node which has received the packaged broadcast packet, and at least one target lighting device is determined from the first node and the second node to execute the function instruction according to a preset multicast address of the node.

The invention discloses a remote control communication method, system and product, and belongs to the technical field of remote control, and the method comprises the steps: constructing a communication protocol, and setting the format of air packets according to the communication protocol, the air packets comprising a state broadcast packet, a pairing request packet, a pairing response packet, a pairing confirmation packet, a connection information packet, a control signal packet and a state response packet; enabling communication equipment to enter a pairing mode, wherein the communication equipment comprises a receiving end and a transmitting end; the receiving end and the transmitting end are paired through various air packets; after pairing is completed, the transmitting end sends a plurality of control signal packets to the receiving end through a single channel, the receiving end is controlled, and after the receiving end completes instructions of the control signal packets, the receiving end sends state response packets, feedback operation results and current states to the transmitting end, and remote control communication is completed. According to the method provided by the invention, low-delay and high-reliability data transmission can be realized, the cost can be reduced, an anti-interference pseudo-random frequency hopping capability is realized, and long-distance and multi-device environment communication is realized.

The invention provides a group control method based on a wireless expansion broadcast technology, and relates to the technical field of wireless communication. The method is applied to a group control system, and comprises the following steps: a mobile terminal sends a broadcast packet to a node device, the node device being a sub-device in a sub-device group; after acquiring the broadcast packet, the node equipment broadcasts the broadcast packet to other sub-equipment in the sub-equipment group; the broadcast packets comprise a first broadcast packet and a second broadcast packet, the first broadcast packet is a basic broadcast packet, the second broadcast packet is an extended broadcast packet, and the second broadcast packet comprises a group control instruction; the sub-equipment acquires a second broadcast packet based on the first broadcast packet after acquiring the first broadcast packet, and extracts a corresponding control instruction from the second broadcast packet; and the sub-equipment in the sub-equipment group responds to the control instruction to execute corresponding operation. According to the method, the transmission efficiency is improved, and the real-time performance and the consistency of sub-device group control are improved.

The invention provides a wireless audio data transmission method and related equipment, relates to the technical field of wireless audio, and is applied to a sending equipment group, and sending equipment in the sending equipment group broadcasts and communicates with N receiving equipment in continuous equal time intervals so as to transmit audio streams, when the sending device group comprises a master sending device and M slave sending devices which are in clock synchronization with the master sending device, the method comprises the following steps: in the equal time interval, the master sending device sends a first broadcast data packet to the N receiving devices based on a first communication link group, and / or in the M slave sending devices, the M slave sending devices send a second broadcast data packet to the N receiving devices based on a second communication link group. At least one slave sending device sends a corresponding second broadcast data packet to the N receiving devices based on the corresponding second communication link group; the first broadcast data packet generated based on the same audio frame and any second broadcast data packet carry the same audio data. According to the invention, the reliability of the audio stream in the transmission process can be improved.

The invention provides a self-adaptive network distribution method and device based on dynamic RSSI (Received Signal Strength Indicator) verification, and belongs to the technical field of intelligent equipment network distribution. Comprising the following steps: receiving a UDP broadcast packet sent by a mobile terminal, acquiring a first RSSI value of the UDP broadcast packet by monitoring the RSSI of the UDP broadcast packet, and performing preliminary verification on the first RSSI value; performing integrity verification on the UDP broadcast packet which passes the RSSI preliminary verification; and calculating a variance of a second RSSI value for the plurality of UDP broadcast packets passing the integrity verification, and determining WiFi configuration information for analyzing the UDP broadcast packets according to the variance of the second RSSI value to perform network distribution. Therefore, on the basis of preliminary verification and integrity verification of the UDP broadcast packet, network distribution is performed after the UDP broadcast packet is analyzed. The problem that an existing Smartconfig network distribution technology is prone to being interfered in a complex wireless environment is solved, the anti-interference capacity can be improved, and then the network distribution success rate and efficiency of intelligent equipment are improved.