100 results about "Multicast network" patented technology

The invention relates to the technical field of remote disaster recovery transmission, and discloses an IPTV multicast service remote disaster recovery transmission method, device and equipment, and the method comprises the steps: employing a multicast convergent point and a multicast transcoding server to carry out the networking architecture construction of a first region and a second region, and obtaining an initial dual-node multicast network; performing dynamic detection on the multicast transcoding server to obtain a multicast service routing mechanism; creating a VPN instance to obtain a service isolation environment; transcoding the multicast stream received by the first area and synchronizing the transcoded multicast stream to the second area to obtain multicast service data; inputting multicast service data into the double-layer agent model, and performing deep reinforcement learning on service scheduling to obtain an intelligent scheduling strategy; and performing load sharing calculation and dual-active backup mechanism establishment on the first area and the second area to generate a remote disaster recovery transmission scheme, thereby realizing dual-active deployment and dynamic load sharing of the service, and remarkably improving the overall service quality of the IPTV live broadcast service.

Embodiments of this application provide a multicast communication method and related apparatus. The multicast communication method is implemented by a user equipment and includes receiving UE route selection policy (URSP) information transmitted by a policy control function entity, the URSP information including a URSP rule supporting a multicast service; querying the URSP rule supporting the multicast service according to a multicast network address corresponding to a multicast service context that needs to be activated, to obtain network slice information and data network name information; and activating Multicast and Broadcast Service (MBS) context information of the user equipment based on the network slice information and the data network name information, adding the user equipment to a multicast group corresponding to the multicast network address for multicast communication.

The invention discloses a door lock collaborative identity recognition method and system, and the method comprises the steps: obtaining a locally stored MAC-face binding relation table according to face recognition verification completed by a resident through an intelligent door lock; according to the moving path of the resident from the floor entrance to the home door lock, identity recognition is completed through cooperation of multicast communication and the home door lock, an identity confirmation result is obtained, and a directional multicast network is constructed; according to a leaving event that a resident opens a door lock from a room, triggering a passing door lock to collect leaving person information, and obtaining a leaving person identity confirmation result; and selecting to send a unicast or multicast confirmation message by the own door lock according to the completion degree of identity confirmation of the leaving person, and triggering the passing door lock to send an IGMP leaving message to the router to obtain a simplified multicast forwarding table. According to the embodiment of the invention, seamless identity cooperation of the whole process from home returning to home leaving can be realized, and the automation degree of home security and protection and the user experience are improved.

The invention discloses a method and system for cooperatively opening a door by a front door lock and a rear door lock, and the method comprises the following steps: front door linkage trigger processing: carrying out entrance record generation processing according to a complete behavior sequence detected by the front door lock to obtain a linkage trigger signal; back door safety decision processing: performing back door state detection and personnel identity multi-level verification processing according to a door opening request message received by a back door lock to obtain an unlocking decision result; reverse guide control processing: according to the doorbell event which is not responded by the front door lock, cross-door lock audio and video channel establishment processing is carried out, and a reverse unlocking instruction is obtained; schedule comparison guide processing: comparing visitor visiting schedule information when the front door lock rings, automatically unlocking and carrying out space guide; and dynamic addressing co-processing: according to the position information of the mobile terminal intercepted by the door lock in the multicast network, carrying out target rear door lock positioning processing to obtain a directional notification strategy. By utilizing the embodiment of the invention, the collaborative response efficiency and the user experience of the intelligent door lock can be improved.

The invention relates to a rapid clock synchronization system and method based on a virtualization technology. The system comprises a secure clock virtual machine STVM, a working virtual machine VM, a clock card and a TSN switch. The STVM is directly connected with a clock card through a virtualization technology to generate a unique clock; the TSN switch establishes a multicast communication network of a secure clock virtual machine STVM and each working virtual machine VM, and is used for transmitting a clock synchronization message of a set period; the STVM sends a clock synchronization message with a corresponding cycle length to each multicast network; and the working virtual machine VM creates a periodic clock synchronization receiving task and receives a clock synchronization signal with a period length. Compared with the prior art, the clock synchronization method has the advantages that the clock synchronization process is simplified, fast and periodic clock synchronization is realized, and meanwhile, the clock synchronization precision is improved.

The invention discloses a reliable recognition method and system for door lock cooperation, and the method comprises the steps: building a binding relation between a mobile phone MAC address and a face feature vector according to a door opening event of the first face recognition of a resident, and constructing a directional multicast network based on the MAC address; according to the movement of the resident on the home returning path, a recognition request is sent to a directional multicast network through a door lock by collecting an MAC list and capturing a human face, and a resident identity recognition result is obtained; according to an identification request that a subsequent door lock encounters face shielding, a data complementation mechanism of a previous door lock is triggered, and service takeover is realized through an IGMP leaving message, so that a complete identity identification result is obtained; and according to the resident leaving trigger event, a leaving message is transmitted through a directional multicast network, the identity of a leaving person is confirmed through a passing door lock, and an in-home duration statistical result is obtained. According to the embodiment of the invention, the identity recognition is high in reliability, the single-point fault can be complemented, and the value-added service is precise.

The invention provides a distributed system, a data transmission method, equipment and a storage medium. The distributed system comprises a plurality of processing nodes, a plurality of data input queues, a plurality of data output queues and a multicast network, each data in-queue is used for caching a data packet sent by the corresponding processing node and sending the data packet to the multicast network; each data output queue is used for caching a data packet sent by the multicast network and sending the data packet copied from the multicast network to the corresponding processing node; and the multicast network is used for copying the data packet of each data in queue and synchronizing any data packet to at least one data out queue. According to the embodiment of the invention, the data packets of the plurality of data in queues are copied through the multicast network, the data packets are sent to the at least one data out queue, and an alarm mechanism for the processing nodes and the in-queue overproof traffic is added, so that highly credible simplification of intelligent calculation model training synchronization traffic and synchronization time can be realized.

The invention discloses an optimization method of a lower planet-earth integrated cell-free network, and belongs to the field of wireless communication. According to the method, a lower planet-ground integrated cell-free network optimization problem is constructed by taking a maximum sum rate (MSR) and a maximum-minimum fairness (MMF) as optimization targets. By adopting the maximum sum rate as an optimization target, the spectrum efficiency is maximized on the premise of meeting the TU / ES service quality requirement of each terminal user. Beam forming is designed by adopting maximum and minimum fairness, so that the fairness of a ground cell-free network is ensured, and the total rate of a satellite downlink multicast network is maximized. The stability of beam forming is ensured by introducing a constant modulus constraint CR1, and the service fairness among users is ensured through a fairness constraint CR2. According to the method, a joint precoding problem based on the MSR is converted into an equivalent quadratic constraint quadratic programming QCQP problem through fractional programming, alternate optimization and successive convex approximation methods, the planet-earth integrated cell-free network is optimized by adopting an algorithm based on the ADMM, and the optimization calculation complexity is remarkably reduced.

In some aspects, a computer-implemented method for performance monitoring in a multicast network, includes a controller causing a source router to originate a probe data packet. The controller may also originate, at the source router, the probe data packet, where the probe data packet is a data packet intended to measure performance data associated with one or more legs of a multicast distribution tree. Further, the source router may transmit the probe data packet through the multicast distribution tree using a probe identifier, where when received by a last hop router associated with the one or more legs of the multicast distribution tree, the last hop router redirects the probe data packet to a CPU of the last hop router configured to generate performance statistics. The source router may receive from the last hop router, the performance statistics.

The invention discloses a data recovery method and device, equipment, a medium and a product, and relates to the technical field of data processing, and the method comprises the steps: obtaining at least one recovery request message sent by a consumer and / or a multicast network; analyzing the recovery request message to obtain a consumer port identifier, a request type and a difference data packet sequence corresponding to the consumer port identifier; performing de-duplication processing on the difference data packet sequence based on the consumer port identifier and the request type to obtain at least one recovery data packet sequence and a sending identifier corresponding to the recovery data packet sequence; and sending the recovery data packet to the consumer and / or the multicast network based on the sending identifier and the consumer port identifier. By adopting the technical scheme, the recovery request message is subjected to deduplication and merging processing, so that repeated uploading of the recovery request is effectively filtered, the resource occupancy is reduced, and the problems of repeated transmission of the recovery request and repeated issuing of the recovery data are solved.

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.

A content selector switch selects, based on a received request for content from a particular remote control device, a multicast network on which to provide the requested particular content. Each multicast network channel of the plurality of multicast network channels is mapped to a respective video channel and each remote control device in the facility (e.g., hotel) is mapped to a respective video channel that the TV controlled by the remote control device stays tuned to. The content selector switch performs the selection by identifying which remote control device in the facility sent the request and selecting the multicast network channel that is mapped to the RF video channel the identified remote control device is mapped to. The content selector switch then provides the specific content on the selected multicast network channel to a multicast-to-channel output device that provides the content on the RF video channel for the TV tuned to that RF video channel to display.

Systems and methods for notifying a search team are disclosed. The system includes at least one multicast core and at least one multicast radio access network connected with the at least one multicast core. The system has at least one network interface and at least one multicast channel via which a multicast radio access network multicast signals within a multicast network. The system includes at least one uplink channel. The at least one network interface is configured to forward the emergency information to the at least one multicast core configured to control the at least one multicast radio access network to multicast the wake-up signal via the at least one multicast channel of the multicast network. The at least one multicast core is configured to receive a response signal to the wake-up signal via the at least one uplink channel and process information contained in the response signal. The at least one multicast core is configured to generate data based on information contained in the response signal. The at least one multicast core is configured to forward the generated data to a search team.

This disclosure provides a multicast network traffic scheduling method, system, electronic device, and readable medium, belonging to the field of communications. The method includes: dividing the uplink of an access node into multiple link groups, each link group containing multiple uplinks corresponding to the same relay node; and dividing multiple downlink multicast sources from the access node into multiple source groups; constructing a weight matrix, where rows correspond to source groups and columns correspond to relay nodes; and determining unicast routes for each source group based on the weight matrix, so that each source group selects the node with the highest weight among multiple relay nodes as the traffic-carrying node, thereby distributing traffic from different source groups to different relay nodes. The multicast network traffic scheduling method, system, electronic device, and readable medium provided in this disclosure can achieve load balancing and reduce congestion risk; simultaneously, it can be implemented using conventional routing strategies without changing the terminal and multicast protocol, resulting in low modification costs and strong scalability.

The invention discloses a cluster communication method and device based on a multicast network, and relates to the technical field of communication or other related fields, and the method comprises the steps: broadcasting the node information of N central nodes in a target communication cluster to the multicast network, and determining a master control node through the broadcast information, N being a positive integer; based on the node information of the master control node, establishing an exclusive message monitoring relationship between the master control node and each service node in the target communication cluster; generating a control message based on the master control node and the specified service process, and sending the control message to the service node based on the exclusive message monitoring relationship; and receiving the control message through the service node, executing the service process indicated by the control message, generating a response message based on an execution result, and returning the response message to the master control node. According to the method and the device, the technical problem of relatively low cluster processing performance and stability caused by the fact that a traditional cluster scheme cannot meet a message processing requirement in a high-concurrency scene in related technologies is solved.

This invention proposes a concise application scheme for multicast networks that integrates network coding, data encryption, and authentication. The scheme maintains high network coding efficiency while ensuring information security. The specific process is as follows: Unencrypted messages transmitted in the network are encrypted. When an intermediate node receives an encrypted message, it determines whether to forward it directly. If forwarded directly, the message is decrypted and re-encrypted. If the message needs to be "mixed" at the node, it is decrypted, mixed, and then forwarded. To ensure the correctness of node encryption and decryption, MAC verification is used.

A system for informing a search and rescue team includes a multicast core, a multicast radio access network connected with the multicast core, a network interface, a multicast channel via which the multicast radio access network multicasts a signal within a multicast network, and at an uplink channel. The network interface is configured to forward emergency information to the multicast core. The multicast core is configured to: control the multicast radio access network to multicast a wake-up signal via the multicast channel of the multicast network, receive via the uplink channel a response signal to the wake-up signal and to process information contained in the response signal, generate data based on the information contained in the response signal, and forward the data generated to the search and rescue team.

A content selector switch selects, based on a received request for content from a particular remote control device, a multicast network on which to provide the requested particular content. Each multicast network channel of the plurality of multicast network channels is mapped to a respective video channel and each remote control device in the facility (e.g., hotel) is mapped to a respective video channel that the TV controlled by the remote control device stays tuned to. The content selector switch performs the selection by identifying which remote control device in the facility sent the request and selecting the multicast network channel that is mapped to the RF video channel the identified remote control device is mapped to. The content selector switch then provides the specific content on the selected multicast network channel to a multicast-to-channel output device that provides the content on the RF video channel for the TV tuned to that RF video channel to display.

Component errors prevent linear photonic circuits from being scaled to large sizes. These errors can be compensated by programming the components in an order corresponding to nulling operations on a target matrix X through Givens rotations X→T†X, X→XT†. Nulling is implemented on hardware through measurements with feedback, in a way that builds up the target matrix even in the presence of hardware errors. This programming works with unknown errors and without internal sources or detectors in the circuit. Modifying the photonic circuit architecture can reduce the effect of errors still further, in some cases even rendering the hardware asymptotically perfect in the large-size limit. These modifications include adding a third directional coupler or crossing after each Mach-Zehnder interferometer in the circuit and a photonic implementation of the generalized FFT fractal. The configured photonic circuit can be used for machine learning, quantum photonics, prototyping, optical switching / multicast networks, microwave photonics, or signal processing.

Embodiments of the present application relate to the technical field of communication, and disclose a multicast method, which comprises the following steps: determining virtual machine information of a target virtual machine; converting the virtual machine information into virtual port information corresponding to a preset SDN controller; and sending the virtual port information to the SDN controller, so that the SDN controller adds the target virtual machine into a multicast group of a virtual multicast network corresponding to a target cloud platform; the virtual multicast network is constructed in advance by the SDN controller according to network configuration information; the network configuration information is converted from logical network information of the target cloud platform; and the target cloud platform comprises the target virtual machine. In the above manner, the embodiments of the present application improve the processing efficiency of multicast services in a cloud environment.

In some aspects, a computer-implemented method for performance monitoring in a multicast network, includes a controller causing a source router to originate a probe data packet. The controller may also originate, at the source router, the probe data packet, where the probe data packet is a data packet intended to measure performance data associated with one or more legs of a multicast distribution tree. Further, the source router may transmit the probe data packet through the multicast distribution tree using a probe identifier, where when received by a last hop router associated with the one or more legs of the multicast distribution tree, the last hop router redirects the probe data packet to a CPU of the last hop router configured to generate performance statistics. The source router may receive from the last hop router, the performance statistics.

A system and associated methods provide procedures for establishing multicast connections and forwarding multicast content from a source to a subscriber when an ingress provider edge in communication with the subscriber is connected to an egress provider edge device belonging to an EVPN instance, especially in cases where the egress provider edge device is not receiving content from the source. The system configures “backup” provider edge devices belonging to the EVPN instance to temporarily forward the multicast content to the egress provider edge device on behalf of the source, enabling the ingress provider edge device and subscriber to continue to receive the multicast content from the source while the multicast network adjusts to recognize a new egress provider edge device. Methods of establishing connections between the ingress provider edge device and the correct egress provider edge device are also provided to avoid flooding and inefficient content forwarding throughout the network.

The invention discloses a unicast source global quantum security multicast network key supplement method. The key supplement request is initiated through the quantum security multicast source, so that key supplement in the unicast source global quantum security multicast network can be reliably and safely realized, and each multicast member in the quantum security multicast group can be effectively prevented from performing the key supplement request; in the prior art, the multicast key center needs to process a plurality of redundant key supplement requests at the same time, resulting in network congestion and network resource consumption, and the processing burden of the multicast key center is reduced. After the multicast key center generates and distributes the supplementary multicast group key, the supplementary multicast group key can be encrypted and multicast to all multicast members in the quantum security multicast group based on the encryption key corresponding to the supplementary multicast group key, so that the security of the supplementary multicast group key is ensured, and the security of the quantum security multicast group is improved. And the real-time performance and continuity of key supplement are also improved, and the synchronization delay of the supplementary multicast group key among the multicast members is reduced.

A resource optimization processor is disclosed for inclusion in peer routers. The resource optimization processor performs a method for resource optimization of the routers. The method includes disabling an inter-switch link (ISL) between peer routers and monitoring downstream links between a primary router and downstream devices connected to the primary router. The method further includes identifying a failure of at least one downstream link and enabling the ISL between the first router and the second router for the failed downstream link upon identification of the failure.

A system and associated methods provide procedures for establishing multicast connections and forwarding multicast content from a source to a subscriber when an ingress provider edge in communication with the subscriber is connected to an egress provider edge device belonging to an EVPN instance, especially in cases where the egress provider edge device is not receiving content from the source. The system configures “backup” provider edge devices belonging to the EVPN instance to temporarily forward the multicast content to the egress provider edge device on behalf of the source, enabling the ingress provider edge device and subscriber to continue to receive the multicast content from the source while the multicast network adjusts to recognize a new egress provider edge device. Methods of establishing connections between the ingress provider edge device and the correct egress provider edge device are also provided to avoid flooding and inefficient content forwarding throughout the network.

The embodiment of the invention provides a multicast joining method and device, and belongs to the technical field of communication. Network slices are deployed in the multicast network, and leaf nodes in the multicast network obtain slice identifiers used for identifying the network slices according to the mapping relation and multicast source group information included in a join message sent by a multicast receiving end. A join message comprising multicast source group information and the slice identifier is sent through a port corresponding to the network slice; and enabling an intermediate node and / or a root node in the multicast network to add the multicast receiving end into the multicast source group identified by the multicast source group information based on the network slice according to the joining message comprising the multicast source group information and the slice identifier. The network node in the multicast network can forward the multicast service of the multicast source group to the multicast receiving end through the network slice, the quality requirement of the multicast service is guaranteed, and service isolation and flexible utilization of network resources are achieved.

The embodiment of the present application discloses a message forwarding method, which is applied to the BIERv6 multicast network. Specifically, when the first network device forwards the first message, if the first path fails, the first network device obtains a first segment list indicating the second path, and the second path is a backup path for the first path. Among them, the first message includes a first target address, and the first target address is used to indicate the second network device, and the first network device is a bit forward router (BFR), and the second network device is the next-hop BFR of the first network device on the first path. After the first network device obtains the first segment list, it can update the first message to obtain a second message including the first segment list, and forward the second message to the second network device via the second path. It can be seen that using this method, when an intermediate link in the multicast network fails, it can switch to a link without a fault to forward multicast messages, thereby avoiding long-term packet loss of multicast messages.

The present disclosure provides a method and device for shortening congestion of a practical general multicast network. The method comprises: each switching device sending a flow head packet count announcement message and a flow tail packet count announcement message to a convergence point in the PGM network; wherein the flow head packet count announcement message and the flow tail packet count announcement message respectively carry a count value of a first part of original data packets and a count value of a second part of original data packets of each service flow of a specified multicast group; the convergence point calculates an end-to-end packet loss rate in the PGM network based on the flow head packet count announcement message or the flow tail packet count announcement message of each switching device; the convergence point sends a flow control announcement message of the highest end-to-end packet loss rate to a multicast source; and the multicast source reduces a sending rate of the specified multicast group based on the flow control announcement message.

A broadcasting aware edge-device network product comprising two or more NMOS nodes, a look-up table and an SDP file re-writer. Each NMOS node is connected to a different network segment and receives SDP files from the network segment to which the NMOS node is connected. The look-up table stores network address translation rules between a first and a second network segment. The SDP file re-writer generates a modified SDP file by re-writing an SDP file received from one of the NMOS nodes by modifying the destination address according to the look-up table. The SDP file re-writer forwards the modified SDP file to the other NMOS node. The other NMOS node registers the modified SDP file with another network segment.

The present application relates to a network configuration method, apparatus, computer device, and computer-readable storage medium. The method comprises: sending a configuration update message to each network element device in a first multicast group based on a first multicast group address; wherein the configuration update message includes configuration update information used to update the configuration of each network element device; after each network element device receives the configuration update result, the configuration update result is sent to a second multicast group in the multicast network via a configuration confirmation message and a second multicast group address; and aggregating the configuration confirmation messages received by the second multicast group and determining the comprehensive configuration result of each network element device based on the configuration confirmation messages. This method can improve network configuration efficiency.