6 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.

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.

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.

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.