82 results about "Multicast address" patented technology

The invention discloses a door lock and card cooperative processing method and system, and the method comprises the steps: triggering a robot calling process according to preset times of doorbell button operation detected by a first door lock and read neighbor RFID card information, verifying a matching result of an RFID card and a resident registration form, and generating an authority verification passing signal; calculating a target multicast address based on the ID number of the RFID card, and converting the ID number of the RFID card into a false source IP address to obtain a communication parameter set; sending an IGMPv3 report message to the router according to the communication parameter set; according to the triggering operation of the same RFID card detected by the assisted second door lock, an assistance multicast request message is generated, the (S, G) forwarding table item is matched through the router and forwarded to the first door lock, the first door lock sends an assistance confirmation message to the second door lock, and robot calling authorization is completed. By utilizing the embodiment of the invention, efficient, safe and low-delay cross-door-lock cooperative operation can be realized.

The invention discloses an optimal service discovery method based on explicit multicast assistance, a medium and equipment. The method comprises the steps that a user side obtains an IP address list of a target server through DNS query and caches the IP address list; based on the real-time network topology, generating a shortest path tree from a user side to all target servers by using a Dijkstra algorithm; an explicit multicast message with a head carrying a target IP list is constructed, and the intermediate router splits the message into unicast or sub-multicast messages according to a next-hop interface; and the user side determines the optimal server by monitoring the first effective response message. According to the method, traditional multicast addresses are replaced by explicit multicast, address resources are saved, network repeated traffic is reduced, meanwhile, dynamic path tree optimization and an intelligent message splitting mechanism are combined, service discovery delay is remarkably shortened, the method is suitable for high-concurrency scenes such as a distributed CDN, the Internet of Things and video live broadcast, bandwidth consumption is effectively reduced, and service reliability is improved.

The invention discloses a shopping method and system based on cooperation of a door lock and an unmanned supermarket, and the method comprises the steps: generating an improved multicast joining message according to shopping list information inputted by an owner on an intelligent door lock, and transmitting the improved multicast joining message to a preset multicast address, thereby completing multicast registration; according to an event triggered by face scanning after an authorized user arrives at the unmanned supermarket, the supermarket door lock generates a verification request message and sends the verification request message through multicast, identity verification is completed, and the supermarket door lock is opened; according to a payment request triggered after the authorized user selects and purchases the commodity, the payment machine generates a payment confirmation message and sends the payment confirmation message through multicast, and an owner confirmation interface is triggered; according to the payment confirmation operation of the owner, the door lock collects the payment two-dimensional code and sends the payment two-dimensional code to the payment machine, after payment is completed, the door lock sends a multicast leaving message, and the shopping process is ended. According to the embodiment of the invention, flexible cooperation of the door lock and the supermarket system can be realized, and the problems of convenient shopping and safety management and control in an offline scene are solved.

The invention discloses a door lock cooperative communication group establishment method and system, and the method comprises the steps: transmitting an IGMP report message carrying a feature vector to a home router according to the same feature vector part obtained by a door lock and an associated media terminal in advance; according to a communication group request initiated by the main control door lock, an invitation message containing a feature vector is sent to the multicast address, and the invitation message is forwarded to the associated door lock and the media terminal at the same time; according to the received invitation message, generating mapping table items respectively corresponding to the control stream and the media stream; according to NAT mapping table item information issued by the home router, the door lock sends a communication group response message to the main control door lock, and the home router forwards the data flow to the corresponding terminal according to the mapping table item. By utilizing the embodiment of the invention, the rapid and automatic networking of the door lock and the media terminal in the local network can be realized, the efficient separation and reliable forwarding of the control stream and the media stream can be realized, and the communication response speed, the security and the resource utilization efficiency can be improved.

The invention discloses a door lock and multi-helper cooperation method and system, and the method comprises the steps: generating a delegation request message according to the operation that a plurality of delegators select helpers on respective door locks and input shopping demands, and building a delegation relation between the delegators and the helpers; according to the established delegation relationship, the delegator door lock sends an improved multicast joining message to a preset multicast address; the shop door lock sends a list request message according to an event triggered by face swiping of the assistant in the unmanned shop, and the router carries out hierarchical aggregation on shopping lists of the plurality of consignors according to a biological feature matching result, generates an aggregated shopping list PIM message and forwards the aggregated shopping list PIM message to a shop system; and according to the aggregated shopping list provided by the store system, the assistant completes commodity selection and purchase, and each consignor respectively confirms and completes payment. By utilizing the embodiment of the invention, the full-process automation from entrustment establishment and list automatic aggregation to distributed payment can be realized, and the efficiency and convenience of multi-person collaborative shopping are improved.

This invention discloses a method and system for rapid vehicle location tracking via door locks. The method includes: configuring topology information containing neighboring door lock addresses for each unit door lock based on a preset community access topology map; the resident door lock sending an IGMP join message to a preset multicast address; generating a discovery message based on the first detection of a Bluetooth tag signal by the unit door lock, and forwarding it to predicted neighbors via unicast according to the neighbor topology; the unit door lock receiving the discovery message switching its Bluetooth detection mode from low frequency to high frequency, forming a relay detection chain along the predicted path; and, based on the condition that the tag's signal strength remains stable near a certain unit door lock, generating a formal announcement multicast message, which is then forwarded by a router to the corresponding resident door lock, completing the vehicle location push. Using this invention, rapid, accurate, and low-power vehicle Bluetooth tag location can be achieved, improving the location response speed and system coordination efficiency in a community environment.

A distributed unit for use in an open radio access network implementing smart reuse comprises circuitry configured to: receive information regarding subscription to a particular multicast address to be used for reuse by a plurality of radio units within the open radio access network; receive a downlink packet for transmission to the plurality of radio units being used for reuse; and transmit the downlink packet using the particular multicast address to the plurality of radio units.

The application relates to the technical field of communication. A communication method and device are provided to provide a multicast service for a terminal device. An SMF receives a first message from a terminal, including a multicast address. The SMF sends a second message to an NRF, the second message being used for querying an SMF for establishing a multicast session for a multicast service corresponding to the multicast address. The first SMF receives a third message from the NRF, the third message being used for indicating that the SMF for establishing the multicast session for the multicast service corresponding to the multicast address is not queried. The first SMF sends a fourth message to the terminal, the fourth message being used for indicating that the terminal is rejected to join the multicast session corresponding to the multicast address. The multicast session establishment scenario and the multicast session configuration scenario are distinguished through the second message, and authorization verification can be performed on the multicast service. When the condition is not met, the NRF does not allocate an SMF to the first SMF for establishing the multicast session, thereby reasonably providing the multicast service for the terminal device.

The invention relates to the technical field of network configuration for interconnection and intercommunication, in particular to a network configuration method, system and device for interconnection and intercommunication and a medium. Determining a network topology structure and dividing a logic area; distributing a unique multicast address field for each area; deploying a self-adaptive routing protocol; distributing preset channels in the core exchange layer through quantum communication; creating an intelligent traffic sculpture engine, predicting burst traffic by using a neural network and presetting a buffer space; implementing a heterogeneous equipment compatibility strategy; constructing an annular redundant architecture; starting a block chain verification mechanism; and deploying a holographic topology monitoring system. Through intelligent linkage of a dynamic routing algorithm and an optical layer self-healing loop, business migration of regional faults can be completed within a human perception threshold, and finance transaction sensitive operation can achieve zero-interruption extreme availability.

The present application discloses a distributed system software upgrade method. Compared with the traditional server-side synchronous upgrade method, the method places high demands on the concurrency and bandwidth of the server side. Once a failure or abnormality occurs on the server side, the upgrade work of the entire system may not proceed smoothly. The multiple client nodes are respectively assigned to different areas, and the operation and maintenance server allocates a corresponding regional multicast address to each area in the address pool; each area selects one of the client nodes as the regional virtual server within the current cycle; the regional virtual server receives the upgrade request from the central upgrade module of the operation and maintenance server, and after successfully downloading the upgrade package, it verifies the integrity of the current upgrade package; and continuously sends the latest software version information according to the established period through the regional multicast address. The present application significantly improves the upgrade efficiency and enhances the fault tolerance of the system, thereby efficiently, stably and reliably performing distributed system software upgrades.

A method comprises, at routers of a network configured to provide connectivity from a multicast receiver to edge routers multihomed to a multicast source of multicast traffic on an Ethernet segment: creating a limited flood domain for the Ethernet segment, wherein the limited flood domain includes boundary routers positioned to make a final decision as to which of the edge routers to send a multicast join for the multicast traffic; by the boundary routers, upon receiving a source announcement that announces the multicast source is active on a particular edge router of the Ethernet segment, locally storing information, provided by the source announcement, which includes a multicast address for the multicast source and identifies a link to the particular edge router; and by boundary router of the boundary routers, upon receiving the multicast join, sending the multicast join to the particular edge router using the multicast address and the link.

This invention discloses a method and system for extending parking space sharing services using door locks. The method includes: based on the pre-set multicast addresses of parking space sharing alliances for multiple owners' door locks, each door lock joins the corresponding multicast group via extended IGMP join messages; based on parking space sharing requests submitted by requesters, resource matching is triggered among the door locks in the alliance; based on the door locks in the multicast group that meet the application requirements, resource reservations are declared to the gateway via extended IGMP messages, and a unique reservation number is generated, ultimately determining the winner of providing shared parking spaces; based on the requests submitted by requesters for extended parking periods, the original shared parking space door locks are given priority in processing, and through time period splitting and recursive negotiation mechanisms, the extended time periods that cannot be covered are transformed into new sharing requests, triggering distributed negotiation and matching among other door locks in the alliance. Using this invention, decentralized parking space resource publishing and distributed negotiation can be achieved, improving the real-time performance, reliability, and system scalability of the sharing process.

The invention discloses a network asset discovery method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining a preset multicast address corresponding to a target communication protocol which is a protocol supporting the transmission of a detection message in a multicast manner; generating an asset discovery message matched with the target communication protocol, and sending the asset discovery message according to the preset multicast address, so that a network asset supporting the target communication protocol feeds back an asset response message; and according to the asset response message, determining an active asset for setting a network address in a target addressing mode. According to the invention, the efficiency and comprehensiveness of active asset detection can be effectively improved.

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

A service provider of data services (e.g. cloud, videoconferencing, streaming) over networks provides at least one address 2002 (preferably IPv6 addresses including multicast addresses) to a device co

Disclosed is a system and a method (400) for managing transmission of Precision Time Protocol (PTP) packets in a communication network. The method comprises receiving (402), at a boundary clock router, the PTP packets from a backhaul network. Further, a forwardable multicast Media Access Control (MAC) address is configured (404) at a combo cell and the boundary clock router. Further, the method comprises establishing (406) a PTP session between the boundary clock router and the combo cell based on the forwardable multicast MAC address configured at the combo cell. Thereafter, the received PTP packets are transmitted to the combo cell using the established PTP session.

Systems and methods for multicast efficiency improvements in O-RAN fronthaul are described herein. In certain embodiments, a network system includes one or more intermediate nodes. The network system also includes a plurality of radio units, wherein the intermediate nodes provide data to the plurality of radio units, and wherein the plurality of radio units are grouped into a plurality of groups, where each group has a different combination of radio units in the plurality of radio units and an associated multicast address. Additionally, when the data is to be provided to multiple radio units in the plurality of radio units, the intermediate nodes are configured to identify one or more groups in the plurality of groups associated with the multiple radio units and use associated multicast addresses for the one or more groups to direct the data only to the multiple radio units in the one or more groups.

The invention discloses a vehicle software local online upgrading method, device and equipment and a medium, relates to the technical field of computers, is applied to a server side, the server side and a client side are located in the same network segment, and comprises the steps that a first service providing message is sent to a router in a multicast mode according to a preset period; the first service providing message is used for informing the client that the server side can provide a local online upgrading service; receiving a service searching message sent by the target client, and replying a second service providing message to the target client so as to establish communication connection with the target client; the service search message is a message sent to an agreed multicast address when a first service providing message is monitored after the target client enters a target area and is powered on; and transmitting the upgrade package to the target client based on the communication connection. According to the invention, the upgrading efficiency of a specific vehicle in a 4S store or a whole vehicle factory is improved, and the problem of repeated payment caused by re-flashing due to cloud use cost and vehicle offline is solved.

The invention discloses a multicast message forwarding path learning method and system. The method comprises the steps that a network switch establishes a multicast subscription relation table, a corresponding relation table of network switch ports and multicast addresses and a network switch neighbor relation table; establishing local part information of a network switch multicast forwarding table in combination with the multicast subscription relation table and a corresponding relation table of network switch ports and multicast addresses; a network switch publishes a multicast address learned by a local machine through a multicast routing protocol message, and establishes partial information of a multicast address forwarding table across the network switch by combining a multicast subscription relation table, a corresponding relation table of a local port of the network switch and the multicast address and a neighbor relation table of the network switch; and a complete multicast forwarding table is formed by combining information of a local part, so that automatic learning of a multicast forwarding path of the network switch is realized. According to the invention, the multicast forwarding path configuration can be automatically completed, the access port of the IED equipment is not limited, and the operation and maintenance level is effectively improved.

This invention provides a VLAN multicast-based system and method for synchronous projection of left and right vehicle lights, relating to the fields of automotive intelligent lighting and in-vehicle communication technology. The system includes a video source, an in-vehicle Ethernet switching device, left / right area controllers, and left / right high-definition vehicle light controllers. The video source generates a single UDP multicast message containing left and right vehicle light pattern data and sends it to a preset multicast address. The in-vehicle Ethernet switching device performs hardware-level replication and forwarding of the message within an independent lighting service VLAN, enabling the left and right high-definition vehicle light controllers to receive the same message instance. Both controllers parse and extract the corresponding light pattern data and synchronously complete the light pattern refresh. This invention eliminates the time difference at the sending end of traditional UDP unicast, reduces network latency jitter through VLAN isolation, and eliminates the need for additional synchronization harnesses, time synchronization protocols, or CAN trigger signals. This limits the refresh time difference between the left and right vehicle lights to within one display cycle, achieving visually error-free synchronization.

The present invention discloses an optimal service discovery method, medium and device based on explicit multicast assistance. The method comprises: a user terminal obtains a list of IP addresses of target servers through DNS query and caches the list; based on the real-time network topology, a Dijkstra algorithm is used to generate a shortest path tree from the user terminal to all target servers; an explicit multicast message with a target IP list is constructed in the header, and an intermediate router splits the message into unicast or sub-multicast messages according to the next-hop interface; the user terminal determines the optimal server by monitoring the first valid response message. The present invention replaces the traditional multicast address with explicit multicast, saves address resources and reduces network duplication traffic, and combines dynamic path tree optimization and intelligent message splitting mechanism to significantly shorten service discovery delay. The invention is suitable for high-concurrency scenarios such as distributed CDN, Internet of Things and live video, effectively reducing bandwidth consumption and improving service reliability.

The invention relates to a wireless network dynamic master control election method based on two-layer multicast and MQTT cooperation. The method comprises the following steps: deploying a plurality of initial peer-to-peer network nodes, wherein a master control election module and an MQTT client module are arranged in each node; and each node initiates two-layer multicast at a data link layer through an MAC multicast address by means of a master control election module, and transmits and receives wireless link signal strength information of adjacent nodes. And each node calculates a link quality score, synchronizes the score and master control candidate information to the whole network, and selects the node with the highest score as a master control node. And the master control node starts the MQTT Broker and synchronizes the network state address information of the MQTT Broker, and other nodes are connected to construct an MQTT architecture. And each node also gives a real-time score through an MQTT control plane, and after the main control node analyzes, migration is triggered if the link of the main control node is degraded. And when the session is cleared, the original master controller sends a backspace notification, the candidate nodes start the Broker and synchronize information, other nodes switch connection, and the original master controller closes the Broker after the session is cleared. By adopting the method, smooth transition from temporary networking to stable operation can be realized.

The embodiment of the invention provides a message forwarding method and device, a wireless controller and a computer readable storage medium, and relates to the technical field of communication. The wireless controller inquires a tunnel multicast forwarding table according to the multicast address in the received multicast service message to obtain all tunnel information corresponding to the multicast address; and respectively sending the multicast service message to the corresponding wireless access points according to all tunnel information corresponding to the multicast address. According to the method, the destination of the multicast service message can be determined according to the multicast address and the tunnel multicast forwarding table in the received multicast service message, so that the multicast service message is accurately forwarded to the wireless access point where the wireless terminal in the multicast group is located, and the multicast service message does not need to be sent to all wireless access points in the same broadcast domain; the copying and packaging processing of the multicast service message on the wireless controller is reduced, and the forwarding efficiency of the wireless controller on the multicast service message in the tunnel forwarding mode is improved.

The invention discloses a signal demodulation method and device, a storage medium and electronic equipment. The method comprises the steps that a target terminal number is determined according to a state array and a number array, the target terminal number is used for indicating a target signal processing terminal capable of demodulating a signal to be processed, and the ith element of the number array represents the terminal number of the ith signal processing terminal, the ith element of the state array represents the terminal state of the ith signal processing terminal, and i is a positive integer; and then, the target terminal number and the to-be-processed signal are sent to the multicast address, so that the target signal processing terminal demodulates the to-be-processed signal, and the signal processing terminal and the signal capturing terminal are added into the multicast group indicated by the multicast address in advance. According to the invention, the technical problem of low signal demodulation efficiency caused by non-uniform resource allocation of the signal processing terminal in the prior art is solved.

This invention discloses a method and system for secure communication between a door lock and a mobile terminal. The method includes: periodically collecting the Bluetooth signal strength of mobile terminals within the coverage area of ​​a unit door lock, dividing the signal strength into preset levels and generating corresponding connection states, then encapsulating these into IGMP join messages and sending them to a specific multicast address; upon receiving the IGMP join message, the door lock gateway registers or refreshes the unit door lock IP, connection state, and local forwarding interface corresponding to the Bluetooth address in its maintained Bluetooth address binding table; based on a voice call request initiated by an indoor extension, constructing a multicast message, forwarding it via a router network, and having the aggregation point RP transmit it in reverse along the established (S,G) table entry path according to the (S,G) multicast tree. Using this invention, a fast, accurate, and secure direct session can be established between the door lock and the mobile terminal, reducing communication latency and dependence on external networks.

The invention belongs to the technical field of fault processing, and discloses an equipment recovery control method and system, and the method comprises the steps: carrying out multicast monitoring according to a preset address when target equipment judges that communication is abnormal; when the control end equipment detects that the connection with the target equipment is abnormal and the target equipment cannot be found, the control end equipment sends a query instruction to a preset address; after receiving the query instruction, the target equipment sends equipment identification information to the control end equipment; the control end equipment generates a target equipment state according to the received equipment identification information and displays the target equipment state; and the target device executes a connection recovery operation according to the received user instruction. In a complex equipment scene, if the connection between the target equipment and the control end equipment is disconnected, communication can still be realized based on the setting of the preset multicast address, so that the limitation of traditional IP addressing routing is eliminated, and the operation cost of a user in an equipment damage scene is greatly reduced; even if the user has misoperation, equipment recovery can still be realized locally without spending a lot of time to search for entity equipment, so that the operation and maintenance cost is greatly reduced; moreover, the preset multicast address constructs a closed security recovery channel, so that the security of the system process can be effectively maintained.

This application provides a blockchain system, data transmission method, apparatus, and device. The blockchain system includes: a first office and at least one second office capable of communicating with the first office; the first office includes at least one organization, and the second office includes at least one organization; each organization includes at least one blockchain node, and at least one organization in the first office and at least one organization in the second office are joined to the same blockchain network; two organizations within the same office communicate via an intra-office communication module; and different offices communicate via an inter-office communication module; a chain management module is provided within the first office, and the chain management module is configured to: manage blockchain nodes deployed at different offices; interact with the inter-office communication modules within each office; detect and configure cross-office communication channels; and allocate IP multicast addresses for corresponding blockchains and / or communication channels. This solution can address the low efficiency and high cost of existing blockchain communication solutions.

A device and method for simulating and testing a networked spacecraft navigation system based on real-time trajectory injection relates to the field of spacecraft testing technology. The device comprises a multi-channel navigation dynamic simulation source, a dual-network card computer, and several GNC test devices. The multi-channel navigation dynamic simulation source system simulation control computer establishes communication with each GNC test device by forwarding data via the dual-network card computer, transmitting information via the UDP communication protocol. The dual-network card computer is configured with multiple transceivers to enable forwarding of multiple UDP multicast addresses. During testing, the GNC test devices transmit trajectory points in real time to the multi-channel navigation dynamic simulation source device. This device and method can implement multi-spacecraft networked flight testing and is capable of testing the navigation functions of networked spacecraft in a variety of different scenarios, effectively expanding the capabilities of the spacecraft navigation test system.

This invention discloses a waveform recording method, apparatus, electronic device, and storage medium based on UDP multicast, to solve the problems of low communication efficiency, poor synchronization, and poor coordination in current smart substation waveform recording. Applied to a smart substation, the method involves multiple waveform acquisition units joined to a specified multicast address; acquiring the smart substation's SCD file and generating station-wide waveform recording mapping information accordingly; for any first waveform acquisition unit that initiates waveform recording, generating linked waveform recording information based on the station-wide waveform recording mapping information and sending it via multicast message; for each second waveform acquisition unit that receives the multicast message, if it is determined based on the multicast message that it meets the waveform recording initiation conditions, then initiating waveform recording and synchronously generating waveform recording files according to the multicast message; grouping all waveform recording files to obtain multiple waveform recording file groups; and performing waveform time stamp and boundary alignment on each waveform recording file group before merging the waveforms to obtain the station-wide waveform recording file.

The application relates to the technical field of wireless screen projection, in particular to an Airplay directional screen projection method and device, which are applied to a proxy server configured with double network cards, the proxy server is arranged between a guest network and a screen projection device network and respectively accesses the two networks; after an mDNS query packet of a user mobile phone terminal is acquired through a guest network card, a simplified mDNS response packet is replied to induce the mobile phone terminal to send a unicast query packet; the unicast query packet is forwarded to a screen projection device network multicast address, only a multicast response packet of a screen projection service bound with the mobile phone terminal is received; a service address in the response packet is modified into a guest network card IP and is fed back to the mobile phone terminal, and a NAT network channel is simultaneously established. The application solves the screen projection service discovery difficulty and the screen projection service discovery difficulty caused by VLAN isolation in a hotel and the like scene, does not need to change an existing network topology, realizes directional screen projection, the screen projection service can be flexibly arranged, adapts to different scene requirements, and has high connection stability.