297 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.

An exemplary embodiment of secure wireless transmission of power using unidirectional communication signals from a wireless-power-receiving device. The method includes, receiving, from a wireless-power-transmitting device that includes a first communications radio, a first wireless-power-transmission signal at a wireless-power-receiving device that includes a second communications radio. In response to receiving the first wireless-power-transmission signal: broadcasting, via the second communications radio of the wireless-power-receiving device and without establishing a communications channel between the first and second communications radios, a data packet, the data packet including information identifying (i) at least one power requirement of a power source of the wireless-power-receiving device (ii) an amount of power received by the wireless-power-receiving device from the first wireless-power-transmission signal. After broadcasting the data packet, receiving, from the wireless-power-transmitting device, additional wireless-power-transmission signals at the wireless-power-receiving device, wherein the wireless-power-transmitting device transmits each of the additional wireless-power-transmission signals using a predetermined sequence of different transmission characteristics.

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 a real-time communication system based on dynamic broadcast routing. The real-time communication system comprises a system driving program of a broadcast network and a system application program corresponding to the system driving program, the system application program performs data communication with the system driving program through an interface, receives user data or a data packet, constructs and analyzes a broadcast link control packet, and obtains a private routing table of wireless communication equipment according to a complete path table of a broadcast network; the system driving program is located in a kernel program of an operating system, and is combined with the system application program to modify routing logic of a network protocol stack of the operating system, the routing logic comprises routing table maintenance, path selection and actual forwarding of broadcast data packets, and dual functions of data transmission and network monitoring are completed; the method specifically comprises the following three stages: the first stage is a broadcast network construction stage, the second stage is a routing path distribution stage, and the third stage is a broadcast network data transmission and routing maintenance stage. According to the invention, the standard RTP data packet is used as a monitoring object, and the monitoring of the link state is realized while the standard RTP data packet is used for bearing the broadcast data, so that the dual functions of data transmission and network monitoring can be completed without extra overhead; the method has the advantages of low network bandwidth occupation, expandability and good network applicability.

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 embodiment of the invention provides a wireless communication method, a system passive chip and a storage medium, and relates to the technical field of wireless communication, the method can be applied to a wireless communication system, and the wireless communication system comprises an excitation source, the passive chip and receiving equipment. The specific scheme is as follows: an excitation source generates a single-frequency carrier signal based on an anti-whitening technology, and sends the single-frequency carrier signal to a passive chip; the passive chip is excited by a single-frequency carrier signal, and generates a broadcast data packet based on the single-frequency carrier signal. The passive chip broadcasts the broadcast data packet, and the broadcast data packet conforms to a broadcast data packet standard in a Bluetooth low-power-consumption communication protocol. And the receiving equipment receives the broadcast data packet. According to the invention, a signal transmission system with low power consumption and high efficiency is constructed, dependence of a passive chip on a radio frequency source is avoided, and a wireless communication system is simplified.

The invention provides a wireless audio data transmission method, system and device, and particularly relates to the technical field of wireless audio, and the method comprises the steps: building a main broadcast communication link when being applied to a main device; establishing a corresponding slave broadcast communication link for each slave device in the one or more slave devices; and broadcasting a master broadcast data packet based on the master broadcast communication link in one of a plurality of continuous equal time intervals, and receiving a corresponding slave broadcast data packet based on the slave communication link corresponding to each slave device, the time slot for broadcasting the master broadcast data packet and the time slot for broadcasting the slave broadcast data packet in the same equal time interval are not overlapped with each other. Based on the setting, the master device can broadcast the master broadcast data packet, and each slave device can broadcast the corresponding slave broadcast data packet, so that a plurality of sending devices are supported to synchronously broadcast multichannel audio through a plurality of broadcast communication links, and a many-to-many interactive wireless communication function is realized.

The invention relates to control equipment, an intelligent equipment network distribution method and a computer readable storage medium, is applied to the technical field of terminals, and can improve the network distribution success rate of intelligent equipment. The control device comprises: a controller configured to determine that a Bluetooth broadcast packet of an intelligent device to be subjected to network configuration is not scanned within a preset duration; detecting whether an AP network generated by the intelligent equipment exists or not under the condition that Bluetooth scanning is kept to be started, so as to enter an AP network distribution process, and executing network distribution of the intelligent equipment based on the AP network distribution process; before network distribution information is sent to the intelligent equipment through AP connection between the control equipment and the intelligent equipment, under the condition that a Bluetooth broadcast packet sent by the intelligent equipment is scanned, an AP network distribution process is stopped; and establishing a Bluetooth connection with the intelligent device based on the Bluetooth broadcast packet sent by the intelligent device so as to enter a Bluetooth network distribution process, and executing network distribution of the intelligent device based on the Bluetooth network distribution process.

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 method and system for enhancing a BLE periodic broadcast rate by using Wi-Fi, and relates to the technical field of wireless communication. According to the method, based on a broadcast packet set in BLE periodic broadcast, periodic broadcast transmission related to Wi-Fi is expanded by configuring parameters of an auxiliary pointer AuxPtr domain and a synchronization information SynInfo domain in an ADVEXTIND packet and an AUXADVIND packet, and a periodic broadcast sending anchor point is still specified according to a BLE protocol; after expansion, the periodic broadcast has a Wi-Fi mode and a BLE mode, the Wi-Fi mode transmits the Wi-Fi periodic broadcast based on the configured parameters, and the BLE mode transmits the standard BLE periodic broadcast. According to the invention, the BLE Bluetooth periodic broadcast is expanded through Wi-Fi, the transmission rate of the BLE Bluetooth periodic broadcast is improved, and efficient communication is realized.

The invention relates to a network distribution method and system for equipment, and the method is applied to a gateway, and comprises the steps: receiving information which comes from a terminal device and is related to equipment to be subjected to network distribution, and the information related to the equipment to be subjected to network distribution comprises an MAC address and a network distribution secret key of the equipment to be subjected to network distribution; encrypting content to be broadcasted through the network distribution key to form a broadcast data packet, the content to be broadcasted including an MAC address and network information of the device to be subjected to network distribution; and broadcasting the broadcast data packet. According to the scheme provided by the invention, after the information related to the equipment to be subjected to network configuration is acquired through the terminal device, the equipment to be subjected to network configuration does not need to be operated to enter the network configuration state, the network configuration process of the equipment to be subjected to network configuration can be searched by the gateway, the network configuration process is simple, and equipment without operation keys is more convenient. Moreover, the content broadcasted by the gateway equipment is encrypted through the network distribution key of the equipment to be subjected to network distribution, so that the security can be ensured, and network distribution of multiple pieces of equipment can be realized at one time.

The present disclosure relates to methods for implementing low-power-consumption operation of a Bluetooth device and related apparatuses. In one example method, after a first electronic device establishes a first Bluetooth connection to a second electronic device, the first electronic device may disconnect the first Bluetooth connection when a first condition is met. After the first Bluetooth connection is disconnected, the first electronic device may periodically send a second broadcast packet to the second electronic device, to implement device keepalive. The second broadcast packet carries a first interval value, and the first interval value indicates an interval for sending the second broadcast packet by the first electronic device.

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.

The invention discloses an access method of a Bluetooth device, a Bluetooth gateway and a system, and the method comprises the steps: firstly receiving a preset configuration protocol sent by a client, then monitoring a broadcast packet of the Bluetooth device, determining the configuration information of the Bluetooth device according to the broadcast packet, determining whether the configuration information is matched with the preset configuration protocol, and if yes, executing the step 2; and if yes, the Bluetooth device accesses the Bluetooth gateway. According to the method, the configuration of the Bluetooth gateway is modified through the preset configuration protocol, so that the Bluetooth device conforming to the preset configuration protocol can be quickly accessed, the access efficiency of the new Bluetooth device is improved, the function of accessing different Bluetooth devices is realized by configuring different preset configuration protocols, the Bluetooth gateway does not need to be developed again, and the method is simple and convenient. The access cost of the Bluetooth device is saved, and the access mode is simpler and more flexible.

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 embodiment of the invention provides a distance measurement method and device based on a signal strength indication (RSSI), relates to the field of terminals, and can improve the accuracy of distance measurement based on the RSSI. The method comprises the steps that a first broadcast data packet is scanned, the first broadcast data packet comprises a plurality of second broadcast data packets from second electronic equipment, and the plurality of second broadcast data packets are from different Bluetooth channels; determining an RSSI (Received Signal Strength Indicator) corresponding to each second broadcast data packet in the plurality of second broadcast data packets; generating a plurality of different linear structures, wherein the plurality of different linear structures respectively comprise RSSI (Received Signal Strength Indicator) corresponding to second broadcast data packets from different Bluetooth channels; determining a target linear structure meeting a preset condition; linear weighted fitting is carried out on the RSSI in the target linear structure, the RSSI corresponding to the current time is determined according to a linear weighted fitting result, and the weight of the RSSI corresponding to the second broadcast data packet closer to the current time is higher; and determining the distance between the first electronic equipment and the second electronic equipment at the current time according to the RSSI corresponding to the current time.

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.