741 results about "Multicast" patented technology

The invention relates to a network real-time synchronization communication system, and relates to the technical field of computer network communication. The system comprises four core modules: a hardware optical IO synchronization module which integrates a multi-wavelength optical transceiver array and an anti-jitter circuit and provides a nanosecond global clock signal, and the synchronization precision is less than or equal to 15ns; the time sequence arrangement module is used for dividing a fixed time window and a dynamic buffer window based on a time sensitive network, supporting a priority preemption mechanism of the SRIO bus and realizing deterministic data transmission; the distributed RTDATA nodes replace a traditional single-board computer, a heterogeneous computing unit and an intelligent storage controller are integrated, and protocol stack processing delay is reduced through the zero copy technology; according to the dynamic multicast routing system, a safely isolated multicast tree is constructed as required, and link load distribution is optimized in combination with machine learning. Through collaborative design of hardware optical synchronization and dynamic data arrangement, the problem of real-time performance reduction caused by multi-node communication concurrence is solved.

The invention discloses a heterogeneous computing system, a cache consistency maintenance method and device, equipment and a medium, and relates to the technical field of heterogeneous computing. The method comprises the step of redefining a cache coherence protocol of the heterogeneous computing system as a metadata index protocol, a multicast synchronization protocol and a hybrid response protocol. Entropy weights of different feature dimensions are determined according to feature values of all data blocks of the heterogeneous computing system, and a protocol most matched with the task load running state at the current moment is determined from a metadata index protocol, a multicast synchronization protocol and a mixed response protocol according to the entropy weights of the different feature dimensions; and determining whether to switch the protocol according to whether the current protocol is consistent with the selected protocol. According to the method, the problem that the protocol cannot be effectively optimized in related technologies can be solved, and the consistency protocol which is most matched with the current task load of the heterogeneous computing system can be accurately determined.

The invention discloses a data transmission method and system suitable for distributed training and a switch, the data transmission method directly realizes multicast operation through the switch, and comprises the following steps: setting a multicast enable bit and a multicast extension field in a TLP data packet, if the multicast enable bit in the TLP data packet is a target field, sending the multicast extension field to the switch, and if the multicast enable bit in the TLP data packet is the target field, sending the multicast extension field to the switch. If yes, analyzing the multicast extension field by using an analysis module in the switch to determine a position parameter of the multicast object target equipment, and determining a port corresponding to the position parameter as a target port; and executing the following multicast operations by utilizing a preset multicast copying module: determining a target port as a main port, determining other target ports as slave ports, writing the TLP data packet into a temporary storage area of the main port, and based on a first-in first-out principle, writing the TLP data packet into the temporary storage area of the main port. And synchronously copying the data in the temporary storage area of the master port to the temporary storage area of each slave port by adopting a DMA controller in the switch. According to the invention, high-efficiency multicast operation can be realized, and link occupation and system overhead are reduced.

Systems and methods are described herein for providing network and protocol architectures to achieve efficient high speed data services in an integrated terrestrial-non-terrestrial network (iTNTN). The iTNTN can include at least a non-geostationary orbit (NGSO) satellite system and terrestrial radio access and core network infrastructures based on cellular standards (e.g., 5G). Embodiments specially configure packet-based routing and dynamic cell-CU-DU (cell to centralized unit to distributed unit) association to accommodate dynamically changing LEO satellite locations and other iTNTN characteristics. These and other configurations are used to enable features, including end-to-end IP data and Layer 2 data services, integrated LEO-GEO (low-Earth orbit and geosynchronous Earth orbit) and LEO-MEO (low-Earth orbit and medium-Earth orbit) services, direct UT-UT (user terminal to user terminal) services, and resource efficient multicast services.

The invention discloses a PCIe (Peripheral Component Interconnect Express) switch supporting parallel sending of multicast data packets, which comprises a plurality of ports and a routing module, at least one port supports a multicast function, the port supporting the multicast function comprises a multicast function register and a multicast management module, and the multicast management module comprises a routing table. And the routing module is in communication connection with the multicast management module and is used for sending the multicast data packet to the destination port according to the routing table. The PCIe switch allows multiple ports to send multicast data packets at the same time without causing congestion.

A terminal according to one aspect of the present disclosure includes a receiving section that receives downlink control information (DCI) for scheduling a downlink shared channel of a multicast; and a control section that controls transmission of Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) with respect to the downlink shared channel based on the DCI, wherein the DCI is common to a plurality of terminals. According to one aspect of the present disclosure, a PDSCH using the multicast can be appropriately received.

The invention provides an exhibition hall content self-adaptive central control display method and system. The method comprises the following steps: acquiring and preprocessing exhibition hall display data; based on the exhibition hall display data obtained through preprocessing, generating feature vectors of the exhibition hall display data by adopting a multi-layer pulse neural network; based on the feature vector of the exhibition hall display data, outputting a content theme association matrix through a content association analysis model; acquiring real-time user behavior data, wherein the real-time user behavior data comprises user position information, sight focus information and stay time information; based on the content theme incidence matrix and the user behavior data, constructing a display strategy optimization model by adopting a space-time orthogonal propagation network so as to generate a self-adaptive display scheme through the display strategy optimization model; and encoding the self-adaptive display scheme by using a multicast addressing encoding scheme, and transmitting the self-adaptive display scheme to an exhibition hall display device for display.

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 embodiment of the invention provides a data transmission method and device of a network-on-chip, electronic equipment and a storage medium. The method comprises the following steps: dividing at least two computing nodes with spatial topology into multicast domains; determining a target node for receiving the first message; according to a target multicast domain to which the target node belongs, adding a multicast control field in the first message to obtain a target message; determining a first routing path outside the target multicast domain according to the multicast control field and a routing algorithm; transmitting the target message to the target multicast domain based on the first routing path; determining a second routing path in the target multicast domain according to the intra-domain mask field; and sending the target message to the target node based on the second routing path. In the embodiment of the invention, the routing path of each message can be directly determined according to the multicast control field added in the message, so that the design complexity of the network-on-chip is reduced, and the data payload proportion and the data transmission efficiency of the network-on-chip are improved.

The invention resides in a computer-implemented communication method. The method comprises a mechanism for distributing blockchain and / or cryptocurrency-related communications such as alerts, notifications and updates across an electronic network to one or more recipients as efficiently and swiftly as possible. Embodiments may use IPv6 multicast to perform such improved communications. A communication can comprise a code, flag or filter which enables the communication to be targeted at particular recipient(s) and allow multicast group members that have no interest or authorised access to the contents of the communication to ignore it. Thus, improvements are provided in respect of processing resources and time. In some examples, the disclosure can be advantageous for the implementation of a blockchain-related alert key or system which can aid in network responses to emergencies or threats, thus improving the security of the blockchain network.

The invention relates to an AI-based satellite communication encryption strategy dynamic optimization method and system. According to the method, a space-time network model is constructed by collecting dynamic topological data of satellite multicast members, a member connection behavior is predicted by using a space-time diagram convolutional network and a probability matrix is generated, and the multicast key tree structure depth and a key distribution path are dynamically optimized based on a prediction result. Self-adaptive switching of a post-quantum cryptographic algorithm is realized in combination with quantum attack threat assessment, model parameters are continuously adjusted and optimized through a closed-loop verification mechanism, and finally collaborative improvement of key updating efficiency and security protection capability is realized in a satellite communication high-dynamic environment, so that key reconstruction delay and signaling overhead are remarkably reduced, and the security protection capability is improved. Meanwhile, quantum computing attack resistance and cross-protocol-layer cooperative protection capability are enhanced, and the problem of insufficient adaptability of a traditional static key management scheme in a dynamic topology scene is effectively solved.

The invention relates to the technical field of industrial networks, in particular to a time-sensitive service flow resource adaptation method for large-bandwidth multicast flow awareness, which comprises the following steps: S1, a controller collects registered service flow information and real-time network state information; s2, after service flow priorities are divided according to the information, a mapping relation between service flows and multiple queues is established, and a forwarding rule is established according to the mapping relation; s3, establishing an optimization target and a resource constraint according to the mapping relation and the forwarding rule; and S4, designing a Markov decision according to the optimization target and the resource constraint, training the neural network model according to the Markov decision and the double-delay depth deterministic strategy gradient so as to output a scheduling decision, and obtaining a multi-dimensional resource adaptation result by a solver according to the scheduling decision. According to the invention, a basic queue model support is provided for end-to-end deterministic transmission of the unicast stream and the multicast stream through the mapping relation and the forwarding rule, the utilization rate of network resources and the number of service streams capable of being subjected to incremental scheduling are improved, and the worst end-to-end delay of the large-bandwidth multicast stream is reduced.

Systems and methods are described herein for providing network and protocol architectures to achieve efficient high speed data services in an integrated terrestrial-non-terrestrial network (iTNTN). The iTNTN can include at least a non-geostationary orbit (NGSO) satellite system and terrestrial radio access and core network infrastructures based on cellular standards (e.g., 5G). Embodiments specially configure packet-based routing and dynamic cell-CU-DU (cell to centralized unit to distributed unit) association to accommodate dynamically changing LEO satellite locations and other iTNTN characteristics. These and other configurations are used to enable features, including end-to-end IP data and Layer 2 data services, integrated LEO-GEO (low-Earth orbit and geosynchronous Earth orbit) and LEO-MEO (low-Earth orbit and medium-Earth orbit) services, direct UT-UT (user terminal to user terminal) services, and resource efficient multicast services.

The present application provides a communication method and apparatus, which enable a terminal device to flexibly determine a method for obtaining multicast configuration information for each multicast service based on the identifier of the multicast service, the probability of obtaining each multicast configuration information method, the level information of the terminal device, the indication information of the method for obtaining the multicast configuration information, and at least one of information indicating that data for the multicast service is to be sent or signal quality information, rather than using a fixed method to obtain configuration information for different multicast services.

The embodiment of the invention discloses a data multicast method, device and system, electronic equipment and a storage medium, and relates to the technical field of communication, and the method comprises the steps that a data source node obtains multicast address information of multicast data; the data source node generates a data storage message carrying multicast data and multicast address information; the data source node sends the message to the switching node; the switching node multicasts the message to each member node of a multicast group according to the multicast address information in the message; and each member node of the multicast group stores the multicast data in the message to the memory position pointed by the respective node storage address according to the multicast address information in the message. The embodiment of the invention can be suitable for a data multicast scene when a plurality of CPUs / GPUs are used for model parallel, data parallel or pipeline parallel processing in large-scale model training, so as to solve the problem of overweight burden of memory bandwidth and network bandwidth in the prior art.

The invention discloses an information compression sensing pushing method and system, a camera carries an area number and an equipment type to join in a unified multicast group distributed by a management server, a camera gateway router and a multicast router in a multicast tree establish multicast forwarding table items carrying the area number and the equipment type, and thus a multicast forwarding tree is formed. After the camera recognizes the pedestrian, the face features are reported to the multicast group, after the multicast router receives the face reporting message, the face reporting message is sent to the upstream interface, the same face feature vector of the same area number is only reported once, and waste of server calculation consumption and network burden is avoided. And after receiving the face report message, the management server extracts the face feature and the area number, and pushes the information corresponding to the area number to the pedestrian corresponding to the face feature, thereby realizing accurate information push based on the area number.

The invention relates to a low-cost Beidou satellite positioning enhancement method, and belongs to the technical field of GNSS positioning. According to the invention, the first Beidou terminal receives the correction number information, realizes high-precision positioning and obtains the observation value domain difference correction number of the position where the first Beidou terminal is located, and at the moment, the first Beidou terminal is used as a base station to establish a Beidou short message multicast group with other Beidou terminals; and broadcasting the observation value domain difference correction number to other Beidou terminals in the area through Beidou short message broadcasting. According to the invention, cooperative positioning of a plurality of north hopper terminals in a working area can be realized without relying on a ground base station; and communication resources of a Beidou No.3 global satellite navigation system are fully utilized, satellite-based and ground-based differential correction number broadcasting is realized based on Beidou short messages, and high-precision positioning and communication self-closed-loop of the system can be realized only through a Beidou system. Infrastructure construction investment is reduced to the maximum extent, the service coverage range is wide, cost is low, and the system is light and easy to deploy.

The invention discloses a method, a device, equipment and a medium for solving multicast channel cutoff, relates to the technical field of network communication, and is used for solving the cutoff problem occurring when a plurality of set top boxes play the same multicast channel. The method comprises the following steps: if it is determined that a government and enterprise gateway receives an IGMP report message forwarded from a first set top box to an LAN port, discarding the IGMP report message; the second set top box is adopted to respond to the IGMP query message, and a new IGMP report message is sent to the government and enterprise gateway; generating a new multicast forwarding table item, a new multicast forwarding table MFD and a new port according to the source MAC and CVLAN information; a port aging timer is updated; adding a new multicast VLAN (Virtual Local Area Network) forwarding table item in the new multicast forwarding table MFD; according to the method and the device, a new multicast forwarding table MFD is synchronized to a user VLAN (Virtual Local Area Network), so that each set-top box cannot receive the IGMP report messages sent by other set-top boxes by discarding the IGMP report messages, and the stable transmission of the multicast stream is ensured.

The invention discloses a data forwarding processing method and system for a campus network, and the method comprises the steps: controlling a plurality of independent cameras to generate a multicast video stream carrying a permission identifier according to an access control terminal triggering event; the method comprises the following steps: synchronously creating (S, G) table entries with permission marks and never expired (*, G) table entries on a path multicast router according to a first video stream data packet received by a multicast source side designated router source DR; according to an IGMP join message which is sent by a receiver and carries a permission identifier, through a matching result of an RP comparison (*, G) table entry output interface permission and a multicast data permission identifier, whether a data stream is forwarded along a shared tree (RPT) is decided; and according to a matching result of the permission identifier of the new receiver and the pruned (S, G) flow permission, activating a pruning state on the multicast path and recovering data flow forwarding. According to the embodiment of the invention, occupation of invalid data streams on campus network bandwidth can be reduced, and the overall utilization rate of network resources is improved.

Methods and apparatuses are described herein for monitoring radio links between wireless transmit / receive units (WTRUs) and determining of radio link failure, and may be used, among others, for New Radio (NR) vehicular communication (V2X); a mode whereby WTRUs can communicate with each other directly. A radio link between a WTRU and another WTRU may be monitored independently per ongoing unicast and / or multicast link, and radio link failure (RLF) may be determined as a function of the monitoring.

The present disclosure relates to a system and method of providing UE capability of supporting reception of multicast in Radio Resource Control_INACTIVE (RRC_INACTIVE) state. The method comprises sending an uplink-message to a communication network to register the UE's intention of joining a multicast session to receive a multicast service. Further a capability-indication is included in the uplink-message, where the capability indication indicates if the UE is capable of joining the multicast session in Radio Resource Control_INACTIVE (RRC_INACTIVE) state. Furthermore, the multicast service is received in the RRC_INACTIVE state based on capability negotiation between the UE and the communication network, in response to the capability indication.

The invention relates to the technical field of network communication, and discloses an internet protocol television (IPTV) server management and control method and system driven by an internet multicast protocol, which comprises the following steps of: firstly obtaining multicast data flow and analyzing protocol characteristics of the multicast data flow, identifying multicast nodes and then fragmenting the flow, constructing a flow on-demand framework, extracting flow load data in the framework and grading and marking; calculating a bandwidth allocation value to detect a traffic abnormal point, determining a congestion area corresponding to the abnormal point and marking a speed limit, calculating a conflict threshold after data is obtained through protocol analysis, identifying a redundancy parameter based on the threshold, optimizing the parameter in combination with a preset QoS standard, and finally making a multicast control strategy according to the protocol analysis data. According to the invention, the resource scheduling efficiency of the IPTV server can be improved.

A medical device communication method that may be implemented within a variety of medical devices including but not limited to infusion pumps. The method may be implemented with a protocol stack for at least intra-device communication. Embodiments provide connection-oriented, connectionless-oriented, broadcast and multicast data exchange with priority handling of data, fragmentation, and reassembly of data, unique static and dynamic address assignment and hot swap capability for connected peripherals or subsystems.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive control information that schedules a multicast traffic channel transmission and that indicates a bandwidth of the transmission. The UE may receive, in accordance with the control information, one or more instances of the transmission, where a quantity of the one or more instances is based at least in part on the bandwidth of the transmission. Additionally, or alternatively, the UE may receive control information that schedules a multicast traffic channel transmission and that indicates whether the UE is to transmit an acknowledgement in response to the transmission. The UE may receive, in accordance with the control information, the transmission, where the multicast traffic channel transmission is received over a bandwidth that is based at least in part on whether the UE is to transmit the acknowledgement in response to the multicast traffic channel transmission.

The invention discloses a door lock cooperative transmission adjustment method and system, and the method comprises the steps: enabling a gateway router to synchronize a binding relation between a current authorizer identifier and an equipment address among whole-network multicast routers through an enhanced PIM protocol according to a face recognition result of a multimedia authorization device for indoor personnel; according to a visitor face image collected by a door lock, sending the visitor face image to a door lock gateway in a multicast mode; dynamically determining to convert the multicast video stream into a unicast stream and forward the unicast stream to one or more multimedia authorization devices according to a visitor feature vector extracted from the multicast video stream by the door lock gateway; and synchronizing the association relationship between the visitor feature vector and the identifier of the authorizer in the whole network by enhancing IGMP and PIM protocols according to the identification result of the multimedia authorization equipment on the specific action of the authorizer. By utilizing the embodiment of the invention, intelligent transmission conversion from equipment connection to identity and intention driving can be realized, and accurate and efficient authorization collaboration and remarkable optimization of network resource load are achieved.

The invention discloses a communication method and device, and relates to the field of communication. The method comprises the following steps: a first network device sends an RRC release message to a terminal device joining a multicast session, wherein the RRC release message is used for indicating that the terminal device is released to a non-connection state; and the first network equipment sends indication information to the second network equipment, wherein the indication information is used for indicating whether the multicast broadcast radio bearer needs to be reconfigured for the terminal equipment. And the second network device reconfigures the multicast broadcast radio bearer for the terminal device according to the indication information, or does not reconfigure the multicast broadcast radio bearer for the terminal device. According to the invention, the indication information is sent to the second network equipment, so that a decision basis for whether to reconfigure the multicast broadcast wireless bearer for the terminal equipment is provided for the second network equipment.

The invention discloses a DMA (Direct Memory Access) controller supporting multicast, which comprises a multicast management module for determining whether multicast is carried out or not according to the address of a data packet to be sent and carrying out data transmission. When the DMA controller is applied to the PCIe switch, CPU resources can be released, the transmission efficiency can be improved, meanwhile, the transmission operation can be reduced, the bandwidth can be efficiently utilized, and the utilization rate of the bandwidth can be improved.

Example embodiments of the present disclosure relate to methods, devices, apparatuses and computer readable storage medium for a transmission indication for a multicast service. In a method, a first apparatus receives a wakeup signal indicating that a next transmission for a multicast service is a new initial transmission or a retransmission. In response to receiving the wakeup signal, the first apparatus performs an action.

The invention discloses a decentralized high-performance multicast method and system based on Gossip and RDMA, and relates to the field of computer network communication. The method has better reliability, realizes zero-loss transmission of data packets through message de-duplication, timeout retransmission, ACK / NACK convergence and a dynamic topology adaptation mechanism, ensures data consistency, and solves the problem of insufficient reliability of traditional UDP multicast; the method has the advantages that the real-time performance is high, the delay is low, the throughput is high, the zero copy and kernel bypass characteristics of the RDMA and the batch processing mechanism of the MPMC are combined, the average delay is lower than 10 microseconds, the throughput in a large data packet scene reaches 374GB / s, and the low-delay requirements of high-frequency transaction, high-performance calculation and the like are met; the method has high expansibility, is based on a decentralized architecture of an improved Gossip protocol, does not need core node maintenance topology, supports dynamic joining or quitting of nodes, can adapt to large-scale cluster expansion, and solves the expansibility bottleneck of centralized multicast.

Embodiments of the present application are related to methods and apparatuses for point-to-multipoint (PTM) configuration for multicast service. An embodiment of the present application provides a user equipment (UE) including: receive multicast in a radio resource control (RRC) non-connected state; and a transmitter configured to: transmit a request of PTM configuration information for multicast reception in the RRC non-connected state; or transmit information associated with multicast reception of the UE after an initiation of state transition from the RRC non-connected state to a RRC connected state to assist deciding a subsequent RRC state used for the multicast reception.