12 results about "IP multicast" patented technology

The invention discloses a real-time broadcast program emergency processing system and method, and the system comprises a hardware layer which completes signal physical access, computing power support and data storage; the data acquisition and preprocessing layer is used for uniformly acquiring and processing multi-source heterogeneous monitoring signals, mainly realizing demodulation, descrambling and demultiplexing of the signals, code stream trimming and IP multicast, and realizing radio frequency monitoring, TS stream monitoring, environment monitoring and EFD intrusion alarm; the core algorithm layer is used for completing feature modeling, multi-channel signal comparison, abnormal classification positioning and continuous model iteration; the application service layer is used for realizing business logic processing, fault warning and automatic handling, and data query and analysis; and the user interaction layer realizes man-machine interaction, state display, model management and compliance auditing. In the aspect of broadcast program degradation identification, the accuracy and the response speed can be improved, so that the aims of reducing the error rate and the accident level of safe broadcast and improving the operation and management level of the safe broadcast are fulfilled.

This application provides a security protection method and apparatus, relating to the field of communication technology. The method includes: receiving a first message; if the first message indicates that the WLAN Layer 2 network to which the network device belongs has IP pass-through capability, then disabling the IP protection function, where IP pass-through capability refers to the ability for devices to communicate directly via IP addresses, and the IP protection function refers to not copying and forwarding received IP multicast messages and IP broadcast messages to the wireless interface; if the first message indicates that the WLAN Layer 2 network does not have IP pass-through capability, then keeping the IP protection function enabled. This can improve message forwarding efficiency.

The application discloses a kind of large-scale IP multicast service's two-layer annular reliable switch cluster method, comprising: interconnection switch 1, switch 2, switch 3 and switch 4 into 1 annular network, to constitute annular cluster;Adjacent switch 1 and switch 2 are configured as an aggregation switch;Switch 3 and switch 4 are set as normal switch;The port of aggregation switch, switch 3 and switch 4 is divided into inter-machine interconnection port and normal end device access port;Annular cluster is configured using modified IGMP snooping, and the mapping relationship table of IP multicast service frame and destination port is obtained;When switch receives IP multicast service frame, according to mapping relationship table, find the destination port corresponding to IP multicast service frame received by itself, send IP multicast service frame to corresponding destination port, while forwarding IP multicast service frame to adjacent switch, realize two-layer forwarding to IP multicast service.

A method implemented by a first network node is provided. The method comprises: transmitting a first request for modification of a multicast broadcast service, MBS, associated packet data unit, PDU, session to a first function node; and receiving a first acknowledgement for the modification of the MBS associated PDU session and an access stratum, AS, PDU session parameter message from a second network node. This solution allows AN delivered multicast to be combined with the 5G control plane such that personalized policy and charging are possible.

The application discloses an IP multicast delay determination method and system, a storage medium and an electronic device. The method comprises the following steps: obtaining a first tuple corresponding to a first recombined TS stream of a target program at a current time point sent by a first monitoring point; determining a target tuple same as first feature data in the first tuple from a plurality of second tuples in a preset upstream monitoring chain table buffer, and determining whether a first receiving timestamp in the first tuple and a second receiving timestamp in the target tuple are same; in the case that the first receiving timestamp and the second receiving timestamp are not same, determining an IP multicast delay of the target program between an upstream of a network transmission path and a downstream of the network transmission path according to the first receiving timestamp and the second receiving timestamp. The application solves the technical problem that the network delay determined by the related art Ping test method cannot accurately reflect the IP network multicast delay.

The invention relates to the field of edge computing and network communication, and provides a multicast-based AI model distributing and updating method and system aiming at the problems of low model distributing efficiency, untimely updating and poor cross-domain consistency in cross-domain AI model distributing and deploying. Training and reasoning tasks are received and distributed to a core cloud and an edge cloud through a computing network dispatching center; the model file distribution is realized by innovatively applying block multicast and subscription routing modes; the deep coupling of the BIER / IP multicast and the service layer is utilized, so that the overhead of repeatedly processing the multicast message by the application layer is avoided; according to the method, distribution and dynamic updating of the GB-level AI model from the core cloud to the edge cloud can be realized, bandwidth consumption of model distribution can be greatly reduced, minute-level synchronous updating is realized, edge cloud model versions are ensured to be consistent, and the method is suitable for a cross-regional computing power collaborative scene in a large computing power project.

The invention relates to a streaming media multicast tamper-proofing method and device based on depth feature fingerprints, and belongs to the technical field of streaming media tamper-proofing, the method comprises the following steps: on a live broadcast source side, packaging an acquired original video stream according to a PES format, and transmitting a PES packet into a tamper-proofing generation module; screening out a PES packet bearing I frame data; generating a first fingerprint and a second fingerprint; combining the two paths of fingerprints into a comprehensive digital fingerprint, packaging the comprehensive digital fingerprint into a special TS packet, inserting the special TS packet in front of the corresponding I-frame TS packet, and transmitting the special TS packet and the original video stream to a terminal side through IP multicast; on a terminal side, analyzing a received TS transport stream, separating a conventional video PES packet and an embedded tamper-proof special TS packet, and reconstructing an SHA-1 abstract and a depth feature vector; fusing the abstract and the depth feature vector into a local comprehensive fingerprint; obtaining a matching score; and judging whether the TS is tampered or not according to the size of the matching score.

The invention provides a loop detection method, a loop detection device and electronic equipment, which can be applied to an FTTR networking scene. The loop detection message is constructed and sent through the first network device, the loop detection message has the two-layer multicast MAC address and the corresponding IP multicast address at the same time, the message can be flooded in the two-layer network according to the multicast MAC address, meanwhile, in the three-layer network, the message can be subjected to flooding according to the multicast MAC address, and the message can be subjected to flooding according to the multicast MAC address. And the IP multicast message can be identified as a standard IP multicast message and is routed and forwarded according to the destination IP address. As the TTL value carried by the loop detection message is updated when the loop detection message passes through each network device in the three-layer network, the loop detection message is updated based on the current TTL value and the initial TTL value of the loop detection message under the condition that any port of the first network device receives the loop detection message sent by the first network device, and the loop detection message sent by the first network device is updated based on the current TTL value and the initial TTL value of the loop detection message. According to the invention, whether a three-layer loop or a two-layer loop appears in the network can be determined, and automatic detection of the loop path in the network is realized.

A communication system 1 includes relay devices 20 and 30 that participate in an IP multicast network. The relay device 20 receives a multicast packet from a terminal 10 and sends out the multicast packet to the IP multicast network. The relay device 30 receives the multicast packet and distributes the multicast packet to a terminal 40. The relay device 30 holds membership information that associates a process with a multicast group in which the process participates, and connection information that associates a process with a connection established between the process and the relay device 30. The relay device 30 receives a multicast packet, refers to membership information to extract processes associated with a multicast group of the multicast packet, refers to connection information for each of the extracted processes to extract a connection associated with that process, and, using each of the extracted connections, converts and forwards the multicast packet so that the multicast packet can be transmitted via that connection.

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

IP multicast is transmitted wirelessly from a transmitting device to a receiving device with stable transmission quality. [Solution] An IP multicast wireless transmission system transmits IP multicast packets from a transmitter to one or more receivers via unidirectional communication. The transmitter and receiver are equipped with wireless communication units for WHDI or WirelessHD transmission, which transmit and receive video signals via radio waves. The system also includes a first control device that encapsulates IP multicast packets in a video signal format transmittable via WHDI or WirelessHD transmission and outputs the encapsulated data to the transmitter, and a second control device that extracts IP multicast packets from the video signal output from the receiver. Data is sent using FEC, which corrects errors that occur on the transmission path between the transmitter and receiver at the receiver side.

It enables IP multicast from a transmitting device to a receiving device via wireless communication, providing stable transmission quality. [Solution] The IP multicast wireless transmission system transmits IP multicast packets from a transmitting device to one or more receiving devices via unidirectional communication. The transmitting device and receiving device are equipped with wireless communication units using a WHDI transmission method or WirelessHD transmission method for transmitting and receiving video signals using radio waves. The system includes a first control device that encapsulates IP multicast packets into a video signal format that can be transmitted using the WHDI transmission method or WirelessHD transmission method and outputs it to the transmitting device, and a second control device that extracts IP multicast packets from the video signals output from the receiving device. Data transmission is performed using an FEC method in which errors occurring in the transmission path between the transmitting device and the receiving device are corrected on the receiving device side.