17 results about "Multicast communication" patented technology

The application discloses a door lock cooperative voice transmission method and system, the method comprising: triggering a voice call connection process according to a voice call connection between a Bluetooth tag device carried by a mobile user and an initial door lock; identifying a user travel direction according to a user face image captured by a camera of a door lock along the way and a Bluetooth tag signal, and informing the door lock in the forward direction to enter a connection preparation state through multicast communication; when detecting a path conflict according to a connection request of multiple opposite users received by an intermediate door lock, re-planning a connection path of at least one of the users; switching the connection path of the coordinated user to a door-to-door door lock or a separate door lock according to the coordination result, and completing a smooth handover of the voice call when the user arrives at the new connection door lock. By using the embodiment of the application, seamless and stable connection of the voice call between multiple door locks can be realized, path conflicts can be avoided, and the communication continuity and experience of the user in a mobile scenario are improved.

Approaches are described for a decentralized computing platform that enables dynamic execution of distributed services through a hybrid on-chain and off-chain architecture. The platform consists of a network of nodes, each running a virtual machine to host and execute service instances. A sequencer component records, sequences, and notarizes function calls to maintain a consistent service-level state across the network. Computation takes place off-chain on nodes that participate dynamically in specific services based on resource availability. A persistent virtual memory structure manages both service-level and instance-level state. The service-level state is synchronized across nodes participating in the same service, while the instance-level state is isolated to individual nodes for independent operations. The memory system is non-volatile, retaining state across function calls and enabling direct execution from memory. A universal procedure call (UPC) framework facilitates decentralized communication through multicast-enabled operations with customizable fault tolerance and supports applications from finance to high-performance computing.

The application discloses a kind of robot multimodal data intelligent transmission method and system, method includes: according to the event that robot accesses network under any broadcast network environment, by access gateway record multicast forwarding table item containing robot attribute information;According to the notification message sent by initiator robot to multicast communication group, carry target robot type, by multicast router robot attribute and target type in notification message are matched;According to the response message returned by target robot, determine unique target robot;According to the consistency judgment result of initiator robot and target robot access gateway, reaccess target robot gateway;According to the state that both sides are in same layer 2 network domain, directional data transmission not dependent on IP address is realized by exchange equipment.Utilize the embodiment of the application, the real-time and reliability of multi-robot collaborative system can be improved.

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.

Approaches are described for a decentralized computing platform that enables dynamic execution of distributed services through a hybrid on-chain and off-chain architecture. The platform consists of a network of nodes, each running a virtual machine to host and execute service instances. A sequencer component records, sequences, and notarizes function calls to maintain a consistent service-level state across the network. Computation takes place off-chain on nodes that participate dynamically in specific services based on resource availability. A persistent virtual memory structure manages both service-level and instance-level state. The service-level state is synchronized across nodes participating in the same service, while the instance-level state is isolated to individual nodes for independent operations. The memory system is non-volatile, retaining state across function calls and enabling direct execution from memory. A universal procedure call (UPC) framework facilitates decentralized communication through multicast-enabled operations with customizable fault tolerance and supports applications from finance to high-performance computing.

The embodiment of the application provides a kind of data collector and light storage inverter system.The data collector includes: system service module, at least one of which is used to execute system function task, key control task and state indication task;Communication interface module, at least one of which is used to execute serial port task, Modbus communication task, bluetooth communication task and multicast DNS communication task;Network connection module is used to switch Wi-Fi task and Ethernet task by optimization;Data processing module is used to execute server communication task, and server communication task is used to establish the communication between the equipment to be collected and server by multiple command codes.The data collector can guarantee the real-time and continuity of data monitoring, and can collect data from multiple devices, has strong compatibility, transmission reliability, disaster recovery resilience and remote operation and maintenance capability, and has high performance.

Various embodiments of the present disclosure provide a method for multicast communication. The method, which can be implemented by a terminal device, comprises receiving, from a network node, a first downlink channel comprising a first downlink assignment index. The first downlink channel is associated with a first service of the terminal device. The method further comprises determining, according to an association between the first downlink channel and the first service, that the first downlink assignment index is for the first service. According to various embodiments of the present disclosure, hybrid automatic repeat request feedback can be efficiently and flexibly implemented for different services (e.g. multicast and unicast services).

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.

The present application relates to the technical field of internet communication, and discloses an identity communication method and a data forwarding method and device for identity multicast, the identity communication method is applied to a controller and includes the following steps: receiving a query request sent by a first terminal device; in response to the query request, querying a preset mapping relationship according to a target identity, obtaining a second device identifier of a second terminal device matched with the target identity and a second location identifier corresponding to the second device identifier; constructing a multicast propagation path from the first terminal device to each second terminal device according to pre-acquired network topology information and the first location identifier and the second location identifier; generating a flow table according to the multicast propagation path, and issuing the flow table to a forwarding node on the multicast propagation path, so that the forwarding node forwards a data packet sent by the first terminal device according to the flow table, and the present application can efficiently and dynamically construct a multicast communication for a specific identity attribute without relying on a fixed IP address.

Embodiments of the present disclosure disclose a multicast communication method and an apparatus therefor, which can be applied to systems such as the Internet of vehicles, V2X and V2V. The method comprises: a first terminal determines a hybrid automatic repeat request (HARQ) feedback mode selected by the first terminal; according to the HARQ feedback mode selected by the first terminal, the first terminal determines whether to retransmit multicast data. By implementing the embodiments of the present disclosure, multicast communication in a Sidelink-U scene can be realized, the integrity of multicast data in the Sidelink-U scene is ensured, and the problem of packet loss of a terminal in a group is solved.

This invention discloses a method, apparatus, electronic device, and storage medium for binding batch devices. The method includes: determining at least one unbound device based on the public IP address of at least one bound device matching a target account; determining candidate devices among the unbound devices based on at least two identification parameters of the unbound devices; wherein the candidate devices are unbound devices that meet the identification parameter filtering conditions; sending verification identifiers to the bound devices and candidate devices to enable multicast communication verification between the candidate devices and the bound devices; if the target candidate device passes the multicast communication verification, then using the target candidate device as a recommended device for binding the target account; wherein the target candidate device is the candidate device among the candidate devices that passes the multicast communication verification. This solution facilitates the rapid binding of batch devices under the same public network but in different virtual local area networks.

The application discloses a kind of based on label door lock cooperation's owner service method and system, method includes: according to guardian label scanned intelligent lamp pole broadcast signal, through the child label scanning task of entrusting request-confirmation mechanism is entrusted to proxy lamp pole;According to the child label signal strength change scanned in different lamp pole during child movement, through signal strength comparison trigger proxy switching mechanism, realize the dynamic relay of proxy lamp pole;According to the event that proxy lamp pole detects that child label signal strength is continuously lower than threshold value, trigger directional alarm to guardian label and multicast alarm to owner door lock;According to the event that guardian label or discovery lamp pole re-detects that child label signal strength recovers to safe threshold value, through multicast communication synchronous release owner door lock and system alarm state.Utilize the embodiment of the application, can improve the discovery and rescue efficiency of child lost, reduce the false positive rate of system, build community-level three-dimensional safety protection closed loop.

In order to implement a communication system capable of quickly securing reliability in multicast, the communication system includes: a base station conforming to New Radio Access Technology; and a communication terminal (UE) capable of performing multicast communication with the base station. While executing the multicast communication, the communication terminal transmits reception status information to the base station in communication with the communication terminal, the reception status information being information related to a data reception status, and the base station performs control of retransmission of data to the communication terminal on the basis of the reception status information.

Methods, systems, and devices for wireless communications are described. The method may include a first network node (e.g., a user equipment (UE)) receiving first control information indicative of a first feedback scheme for multicast transmissions in a non-terrestrial network (NTN) and determining an applied feedback scheme based on the first feedback scheme. The method may also include the first network node monitoring for a multicast transmission and operating in accordance with the applied feedback scheme.

When a communication apparatus transmits a frame by multicast communication or broadcast communication in a state in which connection with one or more other communication apparatuses has been established via a plurality of frequency channels, the communication apparatus determine a frequency channel for use in transmitting the frame based on whether the one or more other communication apparatuses is being operated in a power-saving state in the plurality of frequency channels, and transmits the frame via the determined frequency channel.