57 results about "Multicast message" patented technology

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.

The invention discloses a secure session method and system for a door lock and a mobile terminal, and the method comprises the steps: periodically collecting the Bluetooth signal strength of the mobile terminal in a coverage area of a unit door lock according to the unit door lock, dividing the signal strength into preset gears, generating a corresponding connection state, packaging the signal strength into an IGMP joining message, and sending the IGMP joining message to a specific multicast address; receiving an IGMP (Internet Group Management Protocol) joining message according to the door lock gateway, and registering or refreshing a unit door lock IP (Internet Protocol), a connection state and a local forwarding interface corresponding to a Bluetooth address in a Bluetooth address binding table maintained by the door lock gateway; constructing a multicast message according to a voice call request initiated by an indoor extension set, forwarding the multicast message through a router network, and binding the table by a rendezvous point RP according to the Bluetooth address; and according to the (S, G) multicast tree, reverse transmission is carried out along the established (S, G) table item path. By utilizing the embodiment of the invention, the quick, accurate and safe direct session establishment between the door lock and the mobile terminal can be realized, and the dependence of communication delay on an external network is reduced.

This invention discloses a multicast message processing method, apparatus, electronic device, and storage medium. The method includes: acquiring the multicast source and receiver of the multicast message, and determining a first virtual local area network (VLAN) packet where the multicast source is located and a second VLAN packet where the receiver is located; acquiring the port type and port status of the output port of the multicast source; and synchronizing software entry content to the underlying software development kit (SDK) hardware entry when the first VLAN packet and the second VLAN packet are different and the port type and port status meet preset conditions. This invention solves the problem that some multicast receiving network elements in a multicast network cannot perform multicast group joining, prevents multicast message transmission failures due to port failures of the multicast source, and ensures the stability of multicast services.

The disclosure provides a multicast switching data transmission method and device, and a storage medium, relates to the technical field of mobile communication, and can be applied to the scene that a source base station and a target base station both receive same multicast messages from a same MB-UPF. The multicast switching data transmission method comprises the following steps: receiving a switching request message sent by the source base station, wherein the switching request message comprises a terminal identifier of a first to-be-switched terminal, an MBS session ID and a multicast caching instruction; in response to the PDU having the MBS session ID, caching a multicast data packet corresponding to the MBS session ID based on the multicast caching instruction; and in response to being connected with the first to-be-switched terminal, sending the multicast data packet to the first to-be-switched terminal. The technical scheme of the embodiment of the disclosure can improve the network resource utilization rate and reduce the probability of data packet loss.

The invention provides a multicast message copying method and device, and is applied to the technical field of communication, and the method comprises the steps: obtaining a current ring head address from a multicast access table entry for a to-be-copied multicast message at this time; using the current ring head address to query a ring multicast chain table to obtain a target table item corresponding to the current ring head address, the table items included in the ring multicast chain table being linked in a ring structure; performing copying operation on the multicast message based on the target table item; if it is identified that the multicast copy task is not completed in the annular multicast linked list, acquiring a next hop address; and updating the value of the current ring head address in the multicast access table entry to the next hop address.

A multicast packet transmission method and an apparatus are disclosed, and relate to the field of communication technologies. In the method, a first node may send, to a second node, first multicast routing information that includes multicast routing information of the second node and multicast routing information of a third node, and first positioning information that is for determining the multicast routing information of the second node. In this way, after receiving the first multicast routing information and the first positioning information, the second node determines, based on the first positioning information, the multicast routing information of the second node from the first multicast routing information. In this application, the first node does not need to split the first multicast routing information for the second node, to obtain the multicast routing information of the second node. In this way, a quantity of times of splitting and editing a multicast packet is reduced, and multicast packet forwarding efficiency is improved.

This invention discloses a method and system for collaborative vehicle location using door lock tags. The method includes: sending an IGMP join message carrying a building identifier from a unit door lock, and recording the door lock's interface information and associated tag information in the router's multicast forwarding table; writing its own door lock identifier to a vehicle's Bluetooth tag after the unit door lock detects it, and determining that the vehicle has stopped when this set remains unchanged for several consecutive periods; actively scanning surrounding Bluetooth devices after the vehicle stops, and reporting stopping information including its own identifier and the list to the unit door lock with the strongest signal; and performing interface matching processing on other Bluetooth identifiers in the multicast message carrying an official announcement identifier generated by the received unit door lock to trigger confirmation feedback. Using this invention, accurate collaborative location between vehicle tags and resident door locks can be achieved, improving the accuracy and real-time performance of vehicle parking detection in complex environments.

The embodiment of the invention discloses a message transmission method, related equipment and a system, which are applied to the technical field of network communication and are used for realizing an RDMA multicast function and improving single-point-to-multipoint transmission performance. In the application, a first network device receives a first message from a first computing device, the first computing device is connected with the first network device, the first computing device is a multicast source in a multicast group, and the first message carries first identification information; the first network device sends a second message to a second network device according to the first identification information, the second message is obtained by the first network device replacing the first identification information in the first message with second identification information, and the second identification information is used for indicating that the second message is a multicast message. And the first network equipment changes the first message into the second message for multicast according to the first identification information, so that the multicast function is realized. The first computing device does not need to copy multiple messages, so that the single-point-to-multipoint transmission efficiency is 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 application provides a data processing method and device and electronic equipment. The method is applied to a target gateway, which is any gateway in a preset multicast group. The method comprises the following steps: in the case that a first current state of a first device is acquired, determining a first record item indicating the first device in a local record set, updating first record content associated with the first record item based on the first current state, and marking the first record item with a first record state; sending a first multicast message indicating the first current state to at least one same-group gateway, so that the at least one same-group gateway respectively updates the device state based on the first multicast message, and the at least one same-group gateway is composed of remaining gateways in the preset multicast group except the target gateway; and in the case that a message response returned by each of the at least one same-group gateway is received, marking the first record item with a second record state. The application provides a more efficient and accurate device state synchronization scheme.

The invention provides an Ethernet network card drive multicast-to-unicast realization method, which relates to the field of avionics system airborne networks, and comprises the following steps: configuring a multicast table, obtaining multicast configuration information input by a user, and querying and updating the multicast table according to the multicast configuration information; analyzing the received Ethernet message, acquiring communication address information, judging whether the Ethernet message is a multicast message or not, if so, querying a multicast table, and if a matched multicast group is queried, for each multicast member in the multicast group, sending the multicast message to the multicast table; and modifying the destination multicast group address information of the multicast message into the local unicast address information of the multicast member to generate a unicast message, and transmitting the unicast message to an operating system protocol stack. According to the invention, compatibility of an airborne system Ethernet and a traditional network in application and use modes is realized, smooth transition from the traditional network to the Ethernet is better realized, and the portability of network application is effectively improved.

The invention discloses a cooperative emergency processing method and system based on door lock electric quantity, and the method comprises the steps: enabling members in each door lock group to dynamically elect a main door lock and an auxiliary door lock through the exchange of effective electric quantity information according to an emergency starting instruction, and obtaining a role distribution result in the door lock group; according to a preset evacuation path sequence, the door lock groups whistle in sequence according to a fixed time interval to form sound relay guidance, and the whistling mode is dynamically switched according to the electric quantity state of the door lock; according to the medium electric quantity state of the main door lock, the main door lock and the auxiliary door lock in the group are triggered to negotiate the alternate whistling period proportion based on the predicted continuous whistling duration, and negotiation information is transmitted through multicast information; and according to the low-power state or dynamic trend prediction of the door lock group, triggering auxiliary alarm requests of the front and rear door lock groups, and dynamically adjusting the whistling duration of each door lock group based on a response result. According to the embodiment of the invention, the autonomous coordination and load balancing of the whistling task in the emergency state can be realized, and the robustness, continuity and overall energy efficiency of the alarm system are improved.

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a network node may send a multicast message 4 to a plurality of user equipments (UEs). A network node may identify group radio network identifiers associated with a plurality of UEs. Numerous other aspects are described.

The invention relates to the technical field of passive optical network (PON), is applied to fiber to room (FTTR), enterprise-level fiber to room-Bus (FTTR-B) and broadband fusion terminal products, and particularly relates to a Mesh networking method, device and equipment based on PON and a medium, topology multicast messages are periodically sent by receiving target network equipment, and the topology multicast messages are transmitted by receiving the target network equipment. Determining host address information in the Mesh network according to a private mesh network protocol identifier in the topology multicast message, generating and sending an M1-stage message for the access point to request wireless configuration to the host according to the host address information in the Mesh network, receiving an M2-stage message replied by the host for the M1-stage message and used for the access point to request wireless configuration, and sending the M2-stage message to the host according to the M1-stage message. And the Mesh networking parameter synchronization is completed according to the AP wireless configuration parameter in the M2-stage message, so that the compatibility problem in the networking process of different Mesh protocols is avoided, the success rate of Mesh networking is effectively improved, and the user experience is improved.

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 application discloses a door lock video stream distribution backhaul method and system, the method comprising: establishing a multicast forwarding table by a router according to a unique identifier obtained when each door lock accesses a network; assigning a target cell ID and a target door lock ID for each sub-flow from an available assisting door lock list according to an event of detecting uplink path congestion of a source door lock; encapsulating the sub-flow as a multicast message carrying the target identifier and sending by the source door lock according to the identifier assigned for each sub-flow; unicasting and forwarding original video data packets to a central server by the source door lock as a source; sorting and reorganizing the video data packets received from the source door lock and multiple assisting door locks by the central server according to sequence numbers; directly requesting the source door lock to retransmit lost specific data packets by the server when detecting discontinuous sequence numbers, and directly unicasting and supplementing by the source door lock. The embodiment of the application can improve the reliability, real-time performance and overall utilization of network bandwidth of video stream backhaul.

This invention provides a high-precision synchronization and dynamic reconstruction control method and system for time synchronization signals, belonging to the field of time synchronization technology. The invention receives external time synchronization signals and performs level conversion and validity judgment. For valid / invalid scenarios, a weighted fusion algorithm / internal clock self-excitation is used to generate a master time base signal, improving synchronization reliability and accuracy. Based on the master time base signal, a precise timestamp is generated and periodically distributed via multicast messages. Combined with local clock closed-loop compensation and precise delay measurement on the service board, transmission delay is reduced, delay errors are eliminated, and the board and master time base are precisely aligned. The system monitors the time synchronization input source and VPX slot board status in real time, switching to a backup source and recalculating the fusion algorithm for failure scenarios, and dynamically loading time synchronization service logic for hot-swappable devices to achieve dynamic system reconstruction. Finally, a distributed output signal is generated after level conversion and distributed to the terminal, achieving high-precision synchronization and stable and reliable distribution of time synchronization signals under the VPX architecture.

The invention discloses a multicast port number allocation method and device, equipment, a storage medium and a program product. The method comprises the following steps: a first node receives a multicast message carrying a first SID, wherein the first SID is used for identifying an automatically allocated multicast port number; and the first node allocates a first receiving port number to the multicast message based on the first SID. The second node receives a multicast message carrying a first SID, wherein the first SID is used for identifying an automatically allocated multicast port number; the second node queries a second mapping table based on the first SID, and modifies a destination port number in the multicast message into a receiving port number obtained by table look-up; and the second node sends the modified multicast message.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network entity, configuration information associated with a semi-static hybrid automatic repeat request (HARQ) feedback codebook for multicast messages. The UE may receive, from the network entity, a physical downlink control channel (PDCCH) message, associated with a radio network temporary identifier (RNTI), scheduling one or more multicast physical downlink shared channel (PDSCH) messages. The UE may transmit, to the network entity, one or more fallback HARQ feedback indications, associated with the one or more multicast PDSCH messages, in lieu of transmitting the semi-static HARQ feedback codebook, in accordance with the configuration information and associated with at least one of the RNTI or a feedback configuration associated with the RNTI. Numerous other aspects are provided.

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 present disclosure relates to controlling a group of electrical loads. A load control system can include a control device for controlling an electrical load. The control device can include a load control device, such as a lighting device for controlling an amount of power provided to a lighting load, and a controller device, such as a remote control device configured to send digital messages for controlling the lighting load via the load control device. The remote control device can communicate with the lighting device via a hub device. The remote control device can detect a user interface event, such as a button press or rotation of the remote control device. The remote control device or the hub device can determine whether to send a digital message as a unicast message or a multicast message based on a type of the detected user interface event. The remote control device or other master device can synchronize and / or toggle on / off states of lighting devices in the load control system.

The application discloses a multicast communication security guarantee method, comprising the following steps: a multicast sender periodically sends multicast messages; after a receiver receives the multicast messages, if there is no security check requirement for the received information, the receiver directly uses a security code to check the message integrity, directly uses the message after checking the message disorder, deletion and repetition according to a time stamp and a serial number; and if there is a security check requirement for the received information, the receiver performs security check, including verifying a security signature by using a pre-configured encryption algorithm and key, checking the message integrity, disorder, deletion and repetition, and performing delay check. The application can save communication bandwidth, reduce the number of links and simplify link management based on multicast mechanism transmission of security information.

The application provides a gateway dynamic switching method and system and a storage medium. The method comprises the following steps: after a gateway device joins a dynamic multicast group, a multicast message and a discovery packet are sent; when the gateway device receives the discovery packet, the multicast server and the multicast client are determined according to the discovery packet, the multicast client is controlled to initiate a transmission control connection to the multicast server, key exchange is performed, an encryption key is obtained, and gateway login is performed according to the encryption key; after the multicast client and the multicast server are successfully logged in, link communication is performed, link quality of the multicast server and the multicast client is detected, and link path switching of the multicast server and the multicast client is performed according to the link quality detection result. According to the embodiment of the application, the link communication is automatically controlled, the link path switching of the multicast server and the multicast client is automatically performed based on the link quality detection result, and the user experience is improved.

A method includes broadcasting, by a multicast anchor, a first message that advertises a multicast service for a multicast group, and receiving, by the multicast anchor from a BLE device, a unicast message that indicates a request to join a BLE device to the multicast group. The method further includes joining, by the multicast anchor, the BLE device to the multicast group as a multicast client, and transmitting, by the multicast anchor to the BLE device, one or more multicast messages for the multicast group.

A system and method are provided for generating group encryption keys for a global group and a private group to encrypt wireless messages between an access point and a station. The private group key is based on a unique private group identifier. The global group key and the private group key are sent from the access point to one or more stations via an M3 message as part of a 4-way handshake or as part of a 2-way group key handshake. The global group key is used for encrypted broadcast or multicast messages with an entire group, whereas the private group key is used for encrypted broadcast or multicast messages with a private group that is a subset of the entire group.

The invention relates to the technical field of communication, and provides a multicast message forwarding method and device, MLAG equipment and a program product, the multicast message forwarding method and device are applied to the MLAG equipment in a cross-equipment link aggregation group MLAG network, the MLAG network further comprises opposite-end MLAG equipment, and the method comprises the following steps: when a fault of an aggregation group member port of the opposite-end MLAG equipment is detected, forwarding a multicast message to the opposite-end MLAG equipment; and clearing a preset exit category corresponding to a forwarding port in a multicast forwarding table entry matched with the multicast message to be forwarded forwarded by the opposite-end MLAG equipment in the MLAG equipment, so that the multicast message to be forwarded is forwarded through the forwarding port of the MLAG equipment. According to the method, the convergence group member port fault processing efficiency is improved, and the convergence group member port fault convergence time is shortened.

The application discloses a multicast communication method applied to a multicast communication system, wherein the multicast communication system comprises a multicast source and at least one client, such as a first client; the method comprises the following steps: the multicast source determines a multicast address and a multicast key; the multicast source sends a first Bluetooth message to the first client, wherein the message comprises the multicast address and the multicast key; the first client sends a second Bluetooth message to the multicast source to indicate that the first client confirms to join a multicast group; the first client configures a source address corresponding to the multicast key as a MAC address of the multicast source; the multicast source sends a first multicast message encrypted by the multicast key through WiFi multicast, wherein a source address in a MAC header of the first multicast message is the MAC address of the multicast source, and a destination address is the multicast address; the first client listens to the first multicast message based on the multicast address; and the first client parses the first multicast message by using the multicast key. Thus, large-scale multicast transmission without WiFi connection can be realized.

A system and method are provided for generating group encryption keys for a global group and a private group to encrypt wireless messages between an access point and a station. The private group key is based on a unique private group identifier. The global group key and the private group key are sent from the access point to one or more stations via an M3 message as part of a 4-way handshake or as part of a 2-way group key handshake. The global group key is used for encrypted broadcast or multicast messages with an entire group, whereas the private group key is used for encrypted broadcast or multicast messages with a private group that is a subset of the entire group.

Embodiments of the present application provide a power distribution automation communication solution method and device, computer equipment and a storage medium, the method comprising: a first power distribution equipment sends a GOOSE message of the first power distribution equipment to a first SD-WAN terminal equipment corresponding to the first power distribution equipment, wherein the first power distribution equipment is a power distribution equipment that has failed; the first SD-WAN terminal equipment forwards the GOOSE message after encapsulation to an SD-WAN center to obtain a GOOSE upload message; the SD-WAN center analyzes the GOOSE upload message to generate a GOOSE multicast message; the SD-WAN center multicasts the GOOSE multicast message to a plurality of target SD-WAN terminal equipments belonging to the same network to obtain a GOOSE multicast encapsulation message; the target SD-WAN terminal equipment sends an analysis message after the GOOSE multicast encapsulation message is analyzed to a target power distribution equipment belonging to the target SD-WAN terminal equipment; and the target power distribution equipment makes a protective response measure according to the indication of the analysis message. The reliability and quality of power supply are ensured, and the area where the intelligent distributed function is to be implemented is fully covered.

The application discloses a kind of community mutual aid method and system of multi-door lock coordination, method includes: according to the selection operation of the user of the party of entrusting and the user of the party of being entrusted on respective intelligent door lock, to property management system registration mutual aid identity information, complete multicast network registration;According to the user of the party of entrusting and the business type of the user of the party of being entrusted, generate the entrustment request multicast message and send, and according to user confirmation operation generates entrustment confirmation message and returns the door lock of the party of entrusting;According to the face brushing operation of the user of the party of being entrusted in unmanned shop door lock, trigger face verification multicast message, and the shopping list is sent to shop door lock after the door lock of the party of entrusting receives verification pass message;According to the face brushing payment operation of the user of the party of being entrusted after completing shopping, the door lock of the party of entrusting is sent to payment machine after the door lock of the party of entrusting is confirmed, and payment is completed.Utilize the embodiment of the application, can solve the shopping problem of old people with difficulty in movement, improve the efficiency of multi-party information interaction, guarantee community mutual aid convenient and reliable.