54 results about "Broadcast address" patented technology

The invention discloses a switch, a method and a system for realizing collective communication based on a multicast replication engine, the switch comprises a plurality of ports and a multicast replication engine, and the multicast replication engine comprises a group matcher and a broadcast module; if the multicast replication engine determines that the communication request transmitted by the request port is a broadcast request, the multicast replication engine sends the communication request to a group matcher and receives broadcast data transmitted by a request port target; the group matcher responds to the received broadcast request, determines broadcast ports and corresponding broadcast addresses according to a preset broadcast group table and transmits the broadcast ports and the corresponding broadcast addresses to the broadcast module, the broadcast group table comprises memory addresses configured for all the ports, the broadcast ports are other ports except the request port, and the broadcast addresses are one or more of the memory addresses; and when the broadcast module receives the broadcast ports and the broadcast addresses, each broadcast port is controlled to receive broadcast data through the broadcast addresses. According to the invention, the broadcast operation efficiency can be improved, and the data transmission delay is reduced.

The invention relates to the technical field of address allocation, in particular to an automatic discovery and dynamic address allocation method for 485 bus equipment, which comprises the following steps: a host verifies a broadcast address and transmits an instruction to a bus, captures a delay response of a slave to establish a response queue, analyzes dense signals and peels off conflict fragments, dynamically adjusts sampling to generate rhythm mapping, and sends the rhythm mapping to the slave; address instructions are issued according to the sequence, the slave machines check, update and return receipts, the host machine collects and generates an allocation table, monitors signal drift, adjusts time sequence parameters, reconfigures response time periods, updates a synchronization state and completes recording. According to the method, a mapping mechanism based on a broadcast response time sequence is established, stable node distinguishing is obtained through signal multi-dimensional analysis, independent extraction and sequence self-correction are achieved through differential allocation and dynamic sampling, a self-adaptive communication structure is constructed, unified recognition pairing and rhythm coordination are achieved in address allocation, and the self-organization capacity is remarkably improved; concurrency conflicts are reduced, precision is improved, and communication consistency and efficient automatic addressing in a dynamic environment are ensured.

The application discloses a media stream transmission method and device based on an edge device and electronic equipment, and the method comprises the following steps: an edge all-in-one machine receives a live broadcast request message sent by a site device management cloud module from a first network, the edge all-in-one machine is connected to a second network, the edge all-in-one machine generates media stream service information according to a camera module identifier, and the media stream service information is sent to the site device management cloud module, so that the site device management cloud module requests a target network video recorder corresponding to the camera module identifier to acquire a media stream according to an edge live broadcast address, an IP address and a port; when the target network video recorder feeds back a successful request, the edge all-in-one machine receives the media stream recorded by the target network video recorder through the camera module, and transmits the media stream to a client according to the edge live broadcast address. According to the method, the media stream data is transmitted through the second network LAN, public network bandwidth resources are saved, and the stability and fluency of video playing are improved.

The invention belongs to the technical field of industrial communication, and discloses a Modbus-RTU-based multi-device cooperation method, device, equipment and medium, and the method comprises the steps: uniformly configuring the initial addresses of a plurality of slave devices as the end edge value of the Modbus-RTU address range; the host device issues public information to the plurality of slave devices through the broadcast address; when any slave device detects a trigger event, switching the slave address to a preset report address, and generating request data containing a device identifier; the upper computer receives and processes the request data from the preset report address, and sends a reset instruction to the slave address after processing is completed; and the slave equipment executes overtime standby, screen locking triggering and unlocking interaction operation according to the received overtime parameters and the security credentials, so that multi-equipment cooperation is realized. According to the method, the communication process is optimized through a dynamic address management mechanism, so that the defects of traditional manual configuration are avoided, and the deployment flexibility of an industrial communication system is improved.

The invention discloses a multi-device network access method which comprises the following steps: time-sharing enabling: a master station controls the network distribution process of a slave station by pulling down a GPIO (General Purpose Input / Output) pin; directional broadcasting: the master station sends configuration information to the slave station through the broadcast address; dynamic response is carried out, after the slave station receives the configuration information, distribution network information is fed back to the master station, and binding of the hardware identification and the logic address is carried out; and closed-loop confirmation: the master station sends a confirmation response message to the slave station, and the network distribution process of the slave station is ended by pulling up the GPIO pin. The invention also discloses a multi-device network access system. According to the method and the device, the technical problems that the upper-level equipment needs to manually allocate the sub-equipment address or the equipment position cannot be accurately positioned in the hierarchical topology by adopting broadcast type automatic allocation, and the traditional polling mechanism needs to wait for response step by step in the traditional scheme are solved.

The embodiment of the invention provides a continuous playing method and system for a multimedia data stream, a storage medium and an electronic device, and the method comprises the steps: transmitting a first data packet corresponding to the multimedia data stream to a mobile terminal when a first playing terminal plays the multimedia data stream, the mobile terminal uses the first data packet to generate a continuous playing instruction data packet required by continuous playing of a second playing terminal in the at least two playing terminals; analyzing a continuous playing instruction data packet sent by the mobile terminal to obtain a continuous playing instruction; generating a control signal according to the playing progress of the first playing terminal, cutting off a signal route of the first playing terminal by using the control signal, and obtaining a continuous playing data stream of the multimedia data stream according to the continuous playing address; and performing format conversion on the continuous playing data stream according to the playing format of the second playing terminal to obtain the target data stream, and playing the target data stream on the second playing terminal, thereby solving the problem of how to improve the continuous playing efficiency of the equipment in a multi-equipment switching playing scene in the related technology.

The invention discloses a return bin access detection system and method, a rental cabinet and a medium, which are applied to the technical field of intelligent sharing and are used for solving the problem that the cabinet body capacity of the existing underwater propeller rental cabinet is difficult to adapt to the site demand, and the method comprises the following steps: a communication processing unit sends a broadcast detection data packet; when the address of the broadcast detection data packet is a broadcast address and the type of the data packet is topology discovery, the return bin communication unit generates a detection response data packet based on the equipment identification information of the return bin and sends the detection response data packet to the communication processing unit; when the data packet type of the detection response data packet is a new warehouse response, the communication processing unit determines a return warehouse represented by equipment identification information in the detection response data packet as a new warehouse, and sends a new warehouse access data packet to the central unit; and the central unit distributes a network layer address for the new warehouse and marks the network layer address as online so as to complete registration of the new warehouse. Through a new warehouse access detection mechanism, any number of return warehouses can be accessed to the underwater propeller rental cabinet to adapt to site requirements.

Embodiments of the application disclose a method and device for addressing communication, electronic equipment and storage medium, and relate to the technical field of communication. The method comprises: obtaining a client identifier of a client and a service identifier of a target service; generating a first private layer packet header based on the client identifier, the service identifier and a general instance identifier, and encapsulating the first private layer packet header and an original addressing request data packet to obtain a first private layer data packet; generating a first link layer packet header based on a physical address of the client and a preset broadcast address, and encapsulating the first link layer packet header and the first private layer data packet to obtain a target addressing request data packet; broadcasting the target addressing request data packet in a preset local area network, so that at least one service instance feeds back an addressing response data packet of the target addressing request data packet; and determining a target service instance for communication with the client from the at least one service instance according to feedback time of the at least one service instance, thereby improving addressing efficiency and addressing accuracy.

A method includes broadcasting, by a powered wireless device, a survey request frame to a plurality of ambient (AMP) devices that harvest environmental energy, wherein the survey request frame comprises a unique public key to be used by each AMP device, of the plurality of AMP devices, to generate a survey response frame. The method includes using, within the survey request frame, a first random address as a source media access control (MAC) address and one of a broadcast address or a group address as a destination MAC address. The method includes determining, from each respective survey response frame, whether a corresponding AMP device of the plurality of AMP devices is accessible from which to securely obtain data.

The application relates to a method and system for recommending call live broadcast color ring based on live broadcast sources, the system comprises a centralized management platform and a color ring playing platform, wherein the centralized management platform comprises a color ring management platform and a stream media converter, the color ring playing platform comprises a BM module, a call service and a media server, the color ring management platform is used for color ring user information setting management, the stream media converter is used for media stream conversion, live broadcast stream data of a live broadcast platform is converted into real-time video stream for a camera and other devices, the media server of the playing platform pulls the live broadcast stream, and live broadcast address information is synchronously transmitted to the color ring management platform, based on the above system, the application provides a method for recommending call live broadcast color ring based on live broadcast sources, the method realizes the function of recommending call live broadcast color ring based on live broadcast sources, live broadcast content is pulled and played in real time according to a live broadcast source address, live broadcast stream is played in a video color ring, and the real-time dynamics of video content in the call process is enhanced.

A wireless communication system is provided that can cause a plurality of slave units to perform sensing at the same time or at any designated time. [Solution] A wireless communication sensor system 1 of the present invention includes a plurality of battery-powered slave units 20a, 20b, 20c, ..., 20n, and a master unit 10 that communicates wirelessly with the plurality of slave units. Each of the plurality of slave units 20 includes a timer that sets time information received from the master unit 10, and each of the plurality of slave units 20 goes into a sleep state according to the time information set in the timer, and the master unit 10 can access the slave units sequentially in synchronization with their wake-up from the sleep state. In the present invention, the master unit 10 transmits a timer setting command to all slave units 20 by broadcast address to set a wake-up time in the timer that will wake up each of the plurality of slave units at the same time.

To provide a device for real time dissemination of information or water level status to the community wherein they are at the forefront of the impending disaster. A portable water level monitoring device (1) comprising: a 10 microcontroller (11) connected to a MP3 module (12) with a memory card (12a); a plurality of sensors (13) connected to the microcontroller (11); a public address system (15) connected to the microcontroller (11) ;a broadcast address system (14) connected to the microcontroller (11); a power source system (16) connected to the microcontroller (11) and the plurality of sensors (13); wherein the microcontroller (11) 15 programmed the sensors (13) to collect data and transmit a water level to the public address system (15) and broadcast address system (14). A listening station configured to receive the collected data transmitted.

The invention provides a network device with a slave circuit broadcast access mechanism and a method of operation thereof. The lower slave circuits each have mutually independent device addresses. The upper-layer main circuit is electrically coupled with the lower-layer slave circuit so as to perform network communication through the lower-layer slave circuit. The upper-layer main circuit is configured to transmit a broadcast mode opening instruction containing a broadcast address to the lower-layer slave circuit so as to set the broadcast address for the lower-layer slave circuit and enter a broadcast mode; transmitting a broadcast mode write instruction including a broadcast address and broadcast write data to a lower slave circuit, so that the lower slave circuit with the set broadcast address performs data write according to the broadcast write data; and transmitting a broadcast mode read instruction containing the broadcast address to the lower slave circuits, and requiring only one of the lower slave circuits with the device address conforming to the broadcast address to read data so as to return individual read data.

The invention discloses a method for realizing session synchronization by a multi-live load balancing system based on lvs, and relates to the field of cloud computing. Comprising the steps of (1) preparing computing resources and deploying load balancing nodes and real server nodes, (2) configuring a mode of issuing a route on a router and realizing an equivalent multi-path route, (3) configuring the load balancing nodes, selecting lvs as a load balancer and deploying by using a dr mode of the lvs, and (4) performing lvs session synchronization configuration, and after session synchronization configuration is completed, sending the load balancing nodes to the router. When a user requests to pass through one of the load balancing nodes, if the load balancing node completes TCP three-way handshake and connection is established, quintuple information of TCP connection and a session state are packaged into a lightweight synchronization message through the load balancing node. Sending the broadcast address to all load balancing nodes in the same cluster through the load balancing nodes according to a pre-configured broadcast address; according to the method, a load balancing node receiving a synchronous message firstly searches whether a connrack table item of the same quintuple exists in the local, if not, a new connection tracking record is directly inserted, and if yes, a strategy merging state is updated by using a later uncovered or timestamp, so that the whole cluster is ensured to be completely consistent with a view of the long connection.

The application relates to the field of multi-mode communication, in particular to a communication data management system and method based on a multi-mode network, which comprises a fading sampling module, a channel modeling module, an optical fiber transmission module, a link gain module and a channel solidification module, the fading sampling module is used for collecting pilot signals, the channel modeling module is used for calculating signal loss and constructing a channel model, the optical fiber transmission module is used for setting an optical fiber repeating antenna to perform cross-area signal repeating, the link gain module is used for broadcasting addressing signals, and the channel solidification module is used for solidifying a signal communication mode; the application can help to optimize receiver antenna design, reduce the error code phenomenon caused by signal fading, realize cross-blank area communication under a wireless signal shielding state, construct a three-dimensional communication network, improve the performance, reliability and applicability of a communication system, simultaneously realize dynamic resource scheduling, guarantee communication link stability and reduce the probability of communication interruption.

A method includes determining, by an ambient power (AMP) device that harvests environmental energy, one or more first authentication and key management (AKM) parameters. The method includes broadcasting, to powered wireless devices, an initialization request frame including one or more frame-exchange parameters, the one or more first AKM parameters, and encrypted content with which a powered wireless device of the powered wireless devices is to establish an encrypted wireless communication session with the AMP device. The content that was encrypted can include an identifier of the AMP device that is also known to the powered wireless device. The method includes using, by the AMP device within the initialization request frame, a first random address as a source media access control (MAC) address and one of a broadcast address or a group address as a destination MAC address.

A station (STA) is disclosed for performing orthogonal frequency division multiple access (OFDMA) uplink multi-user (UL MU) transmission. The STA includes a receiver to obtain a control frame from an access point (AP), the frame containing a broadcast address and multiple information fields, each linked to a different STA. These fields include an association ID (AID), subchannel assignment, error correction code type, modulation and coding scheme (MCS), and number of space-time streams. Upon identifying a matching AID, the STA's transmitter sends an OFDMA UL MU transmission, with a preamble composed of first and second parts. The first part spans the full bandwidth and includes training and signal fields; the second is confined to assigned subchannels. The STA may receive an acknowledgement (ACK) from the AP, potentially as a downlink OFDMA MU transmission.

The application relates to a live broadcast control method and device, a video cloud platform and a storage medium, wherein the live broadcast control method comprises the following steps: in response to a video playing request of a client for a target live broadcast address, collecting traffic distribution data and client information based on the video playing request, and counting live broadcast traffic of the target live broadcast address according to the traffic distribution data and the client information to obtain a traffic counting result; and performing access control on the video playing request based on preset live broadcast configuration information and the traffic counting result. The video cloud platform completes counting of live broadcast traffic, reduces the dependence on the data reported by the client, avoids the problem that the traffic counting result is maliciously tampered with, and thus the credibility of the traffic counting information is improved.

The invention relates to a video playing method, computer equipment and a readable storage medium. Generating a video playing request carrying a target live broadcast strategy identifier according to a video playing instruction input by a user for the target live broadcast video; requesting at least one candidate live broadcast address matched with the target live broadcast strategy identifier from a first server according to the video playing request; each candidate live broadcast address has a unique corresponding streaming media protocol; determining a target live broadcast address from the at least one candidate live broadcast address; the streaming media protocol corresponding to the target live broadcast address is a protocol supported by a terminal operation environment; and according to the target live broadcast address, pulling the target live broadcast video from the second server for playing, thereby realizing intelligent adaptation of a playing path, avoiding playing failure caused by incompatibility of video codes, and improving the success rate and compatibility of video playing.

The invention provides an automatic addressing method and device based on an RS-485 bus, equipment and a medium. The method comprises the following steps: receiving a broadcast addressing instruction sent by a main station; the broadcast addressing instruction comprises a control command for setting an addressing register of the slave station to be 1; the slave station is in cascade connection with the master station through an RS-485 bus; performing a setting operation on an addressing register of the slave station based on the broadcast addressing instruction, and sending an automatic addressing instruction; and in response to the automatic addressing instruction, the slave station executes automatic addressing based on an addressing instruction data frame sent by the master station. According to the method, the register of the slave station is automatically set in a mode of supporting RS-485 broadcast, the addressing mode is automatic addressing, addressing of a plurality of slave station RS-485 bus systems can be effectively carried out, dependence on manual node-by-node operation is eliminated, system scale changes can be dynamically adapted, the automatic system deployment efficiency is relatively high, time and labor are saved in the implementation process, and the implementation efficiency is improved. And the labor cost and the debugging time are greatly saved.

The invention relates to a broadcasting method and device, an electronic device, a medium and a product. According to the broadcast method disclosed by the invention, the broadcast address and the broadcast auxiliary key of the audio broadcast equipment in the broadcast packet are updated, so that the broadcast answering equipment without an identity analysis key cannot determine the source of the broadcast packet and the broadcast state of the audio broadcast equipment according to the broadcast auxiliary key; the tracking of the broadcast answering device without the identity analysis key to the audio broadcast device is avoided, and the identity analysis key is further ensured not to be cracked and the audio data is prevented from being leaked, so that the privacy leakage risk is reduced and the user experience is improved.

The invention relates to a live broadcast method and device, computer equipment, a computer readable storage medium and a computer program product. The method comprises the steps of firstly collecting object category indication information of a live broadcast room to identify categories of audiences existing in the live broadcast room, and generating microphone-connected live broadcast addresses and content distribution network addresses corresponding to the two audiences when identifying that microphone-connected audiences and microphone-closed audiences exist in the live broadcast room at the same time. And pushing the live broadcast audio and video streams of the live broadcast room to the microphone-connected audiences through the microphone-connected live broadcast address, and pushing the live broadcast audio and video streams of the live broadcast room to the closed-microphone audiences through the content distribution network address. According to the application, the category of the audience in the live broadcast room is distinguished, and different types of live broadcast addresses are distributed based on the category of the audience, so that the microphone-connected live broadcast address can be distributed to the audience needing microphone connection, and the content distribution network address is pushed and distributed to the audience who does not close the microphone, thereby reasonably distributing the bandwidth flow of live broadcast under the condition of meeting the watching demand of the audience, and improving the user experience. And the utilization efficiency of bandwidth resources is improved.

The invention discloses an equipment networking method, equipment, a system and a medium in a complex network environment. The method comprises the following steps: judging whether a local machine serves as a DHCP (Dynamic Host Configuration Protocol) server in a network or not; if not, an address configuration request is broadcasted to the network, so that an allocation address of a DHCP server in the current network is received within a preset time threshold value, and a local LLDP message is generated to be broadcasted to neighbor equipment in the current network; receiving a neighbor LLDP message sent by the neighbor equipment, analyzing the neighbor LLDP message to obtain a second identifier of the neighbor equipment, and judging whether the neighbor equipment serves as a DHCP server or not based on the second identifier; and if the neighbor equipment serves as a DHCP server, delaying a preset time threshold value of the local machine so as to ensure that the local machine sets the allocation address as a target protocol address of the local machine and sets the first candidate address as invalid within the delayed preset time threshold value. According to the invention, the networking efficiency in a complex network environment can be improved.

The invention provides a system and a method for realizing signal synchronization of a fire sound and / or light alarm, and relates to the field of fire alarm. The method comprises the following steps: establishing a broadcast communication mechanism based on event driving, when a host detects a fire event, generating an instruction frame of which a target address is a broadcast address, defining an alternate control field, and sending the instruction frame to all slaves in a broadcast form; enabling all on-line slaves to receive and analyze the instruction frame at the same time, calculating a transmission delay compensation value, adjusting local trigger time by combining an annular loop and a signal conditioning circuit, and calculating an alternating trigger time point of sound and light alarm and emergency broadcast based on an analyzed alternating control field; and all the slaves execute the starting, stopping or alternate switching operation based on the alternate control field of the sound and light alarm according to the function code at the adjusted trigger time point. The technical problems that synchronous starting or stopping of multiple devices is delayed, and the switching process of all links in operation is disjointed are solved.

The embodiment of the invention discloses an Internet of Things system and a control method thereof, the Internet of Things system comprises a trigger device and at least one functional device, the trigger device is configured to acquire and broadcast a corresponding dynamic control instruction according to received trigger information, at least one control rule and broadcast address information are packaged in the dynamic control instruction, the control rule at least comprises condition information and attribute operation information, and the condition information comprises address information of at least one functional device. The at least one functional device is configured to receive the dynamic control instruction, analyze each control rule in the dynamic control instruction, respond to condition information in each control rule, including own address information, and execute corresponding attribute operation, and in response to the fact that the corresponding attribute operation is executed or the condition information in each control rule does not include own address information, deleting each control rule. Therefore, according to the embodiment, the number of rule configuration devices is reduced, and the user experience is improved.

The application relates to the technical field of address allocation, in particular to a 485 bus equipment automatic discovery and dynamic address allocation method, wherein a host verifies a broadcast address and transmits an instruction to a bus, a slave time-delay response is captured to establish a response queue, intensive signals are analyzed and conflict fragments are stripped, a sampling generation rhythm map is dynamically adjusted, an address instruction is issued according to sequencing, the slave checks and updates and returns a feedback, the host collects and generates an allocation table, signal drift is monitored and timing parameters are adjusted, a response period is reconfigured, a synchronization state is updated and record is completed. According to the application, a mapping mechanism based on broadcast response timing is established, stable node differentiation is obtained through multi-dimensional signal analysis, independent extraction and sequence self-checking are realized through differentiated allocation and dynamic sampling, an adaptive communication structure is constructed, pairing and rhythm coordination are uniformly identified in address allocation, self-organizing capability is significantly improved, concurrent conflict is reduced and precision is improved, and communication consistency and efficient automatic addressing in a dynamic environment are ensured.

The application provides a communication method, device, equipment, storage medium and program product, and relates to the technical field of communication. The method comprises the following steps: receiving a first message sent by an access network device, wherein the first message comprises a first address of the access network device and a type of the first message; broadcasting the first message, and storing the first address of the access network device based on the type of the first message; receiving a second message sent by a terminal device, and determining the type of the second message, wherein a target address of the second message is a broadcast address; when the type of the second message indicates that the second message is used for finding the access network device, modifying the target address of the second message into the first address; and sending the second message based on the first address.

The application discloses a switch, method and system for realizing collective communication based on a multicast replication engine, the switch comprising a plurality of ports and a multicast replication engine, the multicast replication engine comprising a group matcher and a broadcast module; if the multicast replication engine determines that a communication request transmitted by a request port is a broadcast request, the multicast replication engine sends the communication request to the group matcher and receives broadcast data transmitted by the target request port; in response to receiving the broadcast request, the group matcher determines a broadcast port and a corresponding broadcast address according to a preset broadcast group table and transmits them to the broadcast module, the broadcast group table comprising memory addresses configured for each port, the broadcast port being other ports except the request port, and the broadcast address being one or more of the memory addresses; after receiving the broadcast port and the broadcast address, the broadcast module controls each broadcast port to receive broadcast data through the broadcast address. The application can improve the efficiency of broadcast operation and reduce the latency of data transmission.

The invention relates to the field of device burning, in particular to a batch device burning method, system and device based on uboot, comprising: monitoring a predefined broadcast address to receive a broadcast message; determining a network address of a burning device corresponding to the broadcast message according to the received broadcast message; sending burnt file information to the network address; monitoring a predefined file transmission port to receive a file transmission request; analyzing the file transmission request to obtain a corresponding transmission address and a burnt file identifier; and sending the burning file corresponding to the burning file identifier to the transmission address. According to the method and the device, the full-process automation from device discovery, metadata issuing to file transmission is realized, so that one server can simultaneously carry out burning operation on dozens of even hundreds of devices in a network in parallel, the production efficiency of batch device burning is greatly improved, and the time and labor cost required by mass production is remarkably reduced.

The application discloses a network distribution method and device, a nonvolatile storage medium and an electronic device. The method comprises the following steps: sending an acquisition command to a broadcast address in a wireless signal coverage range, wherein the acquisition command is used to acquire information of a plurality of network devices to be grouped in the wireless signal coverage range, and the information comprises local area network addresses of the plurality of network devices to be grouped and the number of sub-devices to be network-distributed in each network device to be grouped; receiving a plurality of first response information of the acquisition command; allocating network grouping addresses to each network device to be grouped in sequence in which the plurality of first response information is sent, and sending the network grouping addresses corresponding to each network device to be grouped to the local area network addresses of the network devices to be grouped; and simultaneously sending a network distribution command to the broadcast address, wherein the network distribution command is used to trigger network distribution of the network devices to be grouped to which the network grouping addresses have been allocated. The application solves the technical problems of slow network distribution and long time caused by the fact that the related art can only network-distribute the plurality of devices one by one.