95 results about "Broadcast packet" patented technology

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.

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.

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 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.

A broadcast packet transmission method and system, device, storage medium and computer program product, the method comprising: acquiring a link layer data packet, the link layer data packet comprising a target data unit for repeated transmission; performing copy coding processing, coding the target data units into physical layer intervals, and obtaining a plurality of physical layer intervals respectively carrying the same target data unit information as repeated intervals; a plurality of repetition intervals are sequentially transmitted. According to the invention, the robustness of broadcast packet transmission can be improved.

The invention discloses an intelligent management system and method applied to an information technology service platform, and relates to the technical field of big data analysis. A data transmission path table is constructed by obtaining a total historical data transmission path of the information technology service platform and relying on a unique identifier of a path node; according to the method, standardized archiving and accurate retrieval management of paths are realized, the problems of time sequence overlapping and transmission conflicts of pheromone broadcast packets are avoided, and reliable data support is provided for platform operation. An independent first pheromone broadcast packet spontaneous period is configured based on path table data analysis in combination with broadcast packet duration, the defects of response lag and tedious operation are overcome, and it is guaranteed that pheromones are synchronized and ordered. And a second broadcast period is dynamically adjusted and configured by comparing predicted pheromone concentration with a threshold value, path increase and decrease and a state change scene are adapted, the problem of state perception distortion after path change is solved, and accurate management and control and stable operation of a platform data transmission path are realized.

The invention discloses a working method and device of a wireless network system, electronic equipment and a medium, and relates to the technical field of wireless networks. The method comprises the following steps: sending a broadcast packet at a Mode 1, wherein the broadcast packet comprises an available channel ID; receiving a connection request sent by the master device to be connected after the master device scans the broadcast packet at the Mode 1; the connection request comprises a target channel ID determined by the to-be-connected main equipment in the available channel IDs; according to the connection request, establishing a connection with a corresponding to-be-connected master device, and performing data interaction with the to-be-connected master device in a target channel corresponding to the target channel ID of the Mode 0; and when the network master device is offline, determining a target master device in all the to-be-connected master devices, and enabling the target master device to serve as a new network master device to perform connection and data interaction with other to-be-connected master devices. According to the method, the network master device can be seamlessly switched, data interaction is carried out through a specific time sequence, and the transmission delay can be reduced.

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 provides a wireless communication method, a battery power monitoring method, an electronic device and a storage medium. A wireless sensor network comprises a sink node and a plurality of sensor nodes. In an initial state, the radio frequency modules of the sink node and the sensor nodes are in a wireless receiving state. The wireless communication method comprises: receiving an upload monitoring data instruction; switching from the wireless receiving state to a wireless sending state; sending a first broadcast packet to the sink node, wherein the first broadcast packet comprises a wireless sensor network identification code, a sink node identification code, a sensor node identification code of the node, and an upload beacon identification code; the upload beacon identification code is used to prompt the sink node to send a first connection request packet to the sensor node; switching from the wireless sending state to the wireless receiving state; receiving the first connection request packet; establishing a wireless connection with the sink node and uploading monitoring data. The wireless communication method can avoid congestion caused by too many nodes.

The invention discloses a Bluetooth device matching connection method, a Bluetooth device, a storage medium and a product, and relates to the technical field of Bluetooth devices.The Bluetooth device matching connection method comprises the steps that a Bluetooth hardware communication module responds to a Bluetooth scanning instruction and sends a broadcast packet of a second Bluetooth device to an upper layer application module; the upper-layer application module generates an identification result according to the equipment category parameters in the broadcast packet, and sends a pairing instruction to the Bluetooth hardware communication module; the Bluetooth hardware communication module responds to the pairing instruction and starts a main service discovery process with the second Bluetooth device; when the identification result is that the preset function is supported, the upper-layer application module sends a connection instruction to the Bluetooth hardware communication module; the Bluetooth hardware communication module responds to the connection instruction to establish a sound control transmission channel with the second Bluetooth device after the main service discovery process is executed, and Bluetooth connection with the second Bluetooth device is completed. By adopting the method, the establishment time of the sound control transmission channel between the Bluetooth devices can be shortened.

A method can include, by operation of a wireless device, monitoring at least a first advertising channel for an advertising packet; in response to advertising data in the advertising packet, synchronizing transmission and reception of packets to an advertising link that includes sub-intervals within a repeating interval on a second advertising channel. During a download sub-interval of the sub-intervals, and update packet can be received that includes new parameter data. During an upload sub-interval of the sub-intervals, transmitting an update response packet indicating the new parameter data has been received. Wireless operations of the wireless device can be configured according to the new parameter data. Communications can continue with the same advertising link while operating according to the new parameter data. Corresponding devices and systems are also disclosed.

The invention discloses a connection method and a related device. After the first electronic device can receive the first broadcast packet sent by the second electronic device, if the first broadcast packet carries the first identifier, the second electronic device is automatically reconnected not based on the white list of the first electronic device. And if the first broadcast packet does not carry the first identifier, automatically reconnecting the second electronic device based on the white list of the first electronic device. Therefore, the second electronic equipment can inform the first electronic equipment whether to automatically reconnect the second electronic equipment based on the white list or not by judging whether the first identifier is carried in the first broadcast packet or not. The first electronic equipment can be prevented from frequently scrambling with other equipment to establish communication connection with the second electronic equipment after receiving the first broadcast packet sent by the second electronic equipment.

A lighting control system, power controllers, lighting controllers, LED light strings and control thereof, a hyper wireless control system, and further aspects are described herein. A technological method performed by an LED light string system with wireless communication among power controllers is described. A technological method performed by a power controller in an LED light string system with wireless communication among power controllers is described. In the system, a broadcast packet is forwarded, and a new signal source is formed, when the interval between reception times of two received broadcast packets is not less than a preset value or the two received broadcast packets are not identical. Forwarding is stopped, when the interval between reception times of two received broadcast packets is less than a preset value and the two received broadcast packets are identical. The system controls LED strings in accordance with broadcast packets.

The invention discloses a method for improving a power failure alarm reporting success rate of a G3 dual-mode communication module. According to the method, when equipment normally communicates, a link searching request is sent only through a radio frequency link layer, after validity of a two-way link is verified, routing cost is calculated, a radio frequency communication table is constructed, table entries are sorted according to the routing cost, meanwhile, the reliability of the link is verified through regular unicast, and an invalid link is deleted. And when the equipment is powered down to trigger an alarm, preferentially selecting an optimal superior node from the radio frequency communication table to carry out unicast transmission, and polling other effective links in the table if the transmission fails. And after receiving the alarm information, the node queries a reported information table, only forwards non-repeated information, and inputs source node information into the table to filter repeated data after successful forwarding. According to the invention, broadcast packets and repeated data volume in the network can be greatly reduced, network congestion is avoided, and the power failure alarm reporting success rate is remarkably improved.

Provided are a method of estimating of the number of Bluetooth low energy (BLE) in an extended neighbor discovery process and an apparatus thereof, and a method of estimating the number of extended BLE may receive extended advertising data packets and data packets from a plurality of advertising devices, respectively based on a predetermined cycle, acquire a first candidate value, a second candidate value, and a third candidate value for the number of plural advertising devices based on a first measurement value for the number of extended advertising data packets measured, a second measurement value for the number of data packets measured based on the predetermined cycle, and a third measurement value for the number of advertising devices measured based on the predetermined cycle, and acquire information on the number of plural advertising devices based on information on the number of extended advertising data packets, information on the number of data packets, and information on the number of advertising devices related to the first candidate value, information on the number of extended advertising data packets, information on the number of data packets, and information on the number of advertising devices related to the second candidate value, and information on the number of extended advertising data packets, information on the number of data packets, and information on the number of advertising devices related to the third candidate value.

The application discloses an emergency help-seeking method and device and a computer readable storage medium, and relates to the technical field of emergency help-seeking, in which the method comprises the following steps: when an emergency help-seeking signal is generated, it is judged whether the help-seeking terminal is in a networking state; if the help-seeking terminal is in the networking state, the emergency help-seeking signal is sent through a connected network; if the help-seeking terminal is not in the networking state, the obtained help-seeking information and the emergency help-seeking signal are encapsulated into a low-power Bluetooth broadcast packet; the low-power Bluetooth broadcast packet split into multiple packets is circularly broadcasted until one or more relay terminals receive the low-power Bluetooth broadcast packet; and when a help-seeking cancellation signal is generated, the low-power Bluetooth broadcast packet is stopped from being broadcasted. The application realizes a humanized emergency help-seeking scheme, makes the emergency help-seeking signal be orderly and widely forwarded in a non-network state, improves the rescue success rate and execution efficiency, and enhances the user experience of the emergency help-seeking function.

The invention relates to the field of establishing wireless communication. The present method includes steps in which a first device sends a broadcast packet containing a service identifier and a correction factor for the signal strength of said first device. A second device receives the broadcast packet and extracts the service identifier and the value of the correction factor for the signal strength level of the first device. The second device measures the value of the signal strength level of the first device at the location of said second device. The second device calculates the value of a calculated signal strength level of the first device using the value of the signal strength level of the first device and the value of the correction factor for the signal strength level of the first device. If the value of the calculated signal strength level is above a given threshold value, establishment of a wireless connection between the second and first devices is initiated. The technical result is that of reducing the likelihood of a wireless connection being created between a device and a non-target device, and therefore enhancing the safety and reliability of the connection established.

The invention provides a detachable multi-sound networking method and device, and a storage medium. The method comprises the following steps: S1, distributing a corresponding unique identity label to each sound box detachable from a vehicle; s2, in response to the fact that the sound equipment is detected to be separated from the vehicle, controlling the sound equipment to enter a networking standby state; s3, in response to the detected networking instruction, determining the first sound box and controlling the first sound box to send a networking broadcast packet carrying a unique identity label; s4, the first sound equipment identifies at least one sound equipment which has a unique identity identifier and is in a networking standby state from the received response packet, and the at least one sound equipment serves as second sound equipment; s5, forming a networking link by the first sound equipment and the second sound equipment; and S6, obtaining respective positioning information and current scene information through the first sound equipment and the second sound equipment, and controlling a networking link to execute audio playing according to the positioning information and the current scene information. On the basis, cooperative networking of the detachable sound equipment outside the vehicle can be achieved, and the self-adaptive and high-quality audio playing requirements of the scene outside the vehicle are met.

A method of transmitting a message by a home appliance includes generating a transmission message, generating one or more sub-transmission messages from the transmission message based on a limited length of a scan response data packet of Bluetooth low energy (BLE) advertising, transmitting a BLE advertising packet including header information of the transmission message, and transmitting one or more scan response data packets respectively including the one or more sub-transmission messages.

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.

Embodiments of the present application disclose a device network configuration method and system, a storage medium and related devices, and are applied to the technical field of communication. In a master device mode of a first wireless network, a to-be-configured device receives a dynamic host configuration protocol message sent by a slave device. If specific information options of the dynamic host configuration protocol message include network configuration information of a second wireless network, the to-be-configured device switches to a slave device mode of the second wireless network after processing the dynamic host configuration protocol message, and performs network configuration of the second wireless network according to the network configuration information. In the process of obtaining the network configuration information, the to-be-configured device does not need to actively listen to a broadcast packet, but passively obtains the network configuration information by receiving the dynamic host configuration protocol message sent by the slave device, only needs to involve a WiFi drive layer and an IP layer, and does not need to involve an application layer, so that consumption of the to-be-configured device during network configuration is reduced, and network configuration time is reduced.

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.

The invention discloses a low-delay Bluetooth wireless communication method and device, a storage medium and electronic equipment, and the method comprises the steps: respectively building low-power-consumption Bluetooth links with at least two servers when a target broadcast packet sent by the at least two servers is scanned; sending a first trigger signal to the first server at the anchor point moment of each communication period so as to trigger the first server to continuously send the first audio data packet for multiple times in the first allocation time slot; when the first distribution time slot is finished, a second trigger signal is sent to a second server-side device so as to trigger the second server-side device to continuously send a second audio data packet for multiple times in the second distribution time slot, and the first distribution time slot and the second distribution time slot are not overlapped in time sequence; a first audio data packet and a second audio data packet are received. According to the method and the device, the data transmission efficiency can be improved while the synchronism is ensured.

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.