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Two-layer multi-casting flow retransmission method

A layer-2 multicast and multicast forwarding table technology, applied in the field of communication, can solve the problems of software and hardware load of multicast equipment, and achieve the effects of reducing resource consumption, improving utilization rate, and reducing burden

Active Publication Date: 2011-04-13
XINHUASAN INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The problem to be solved by the present invention is to provide a method for forwarding multicast streams in a layer-2 multicast device and a layer-2 multicast device to solve the problem of the multicast device software in the prior art caused by a large number of user terminals ordering multicast groups. and hardware problems that cause huge loads

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  • Two-layer multi-casting flow retransmission method
  • Two-layer multi-casting flow retransmission method
  • Two-layer multi-casting flow retransmission method

Examples

Experimental program
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Embodiment Construction

[0033] In the process of creating a multicast group and a multicast forwarding entry, take the process of a Layer 2 multicast device processing an IGMP message sent by a user terminal as an example. The Layer 2 multicast flow forwarding method is as follows: figure 2 shown, including the following steps:

[0034] Step s201, the layer-2 multicast device detects the IGMP report message of joining the multicast group sent by the user terminal to the layer-3 network device;

[0035] Step s202, the layer 2 multicast device judges whether the multicast group entry and the multicast forwarding entry of the multicast group have been established, if established, proceed to step s206, otherwise proceed to step s203;

[0036] Step s203, the layer-2 multicast device receives the multicast data stream sent by the layer-3 network device;

[0037] Step s204, the layer 2 multicast device creates a multicast group entry according to the multicast group address of the data stream, and the mem...

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Abstract

The method includes steps: (1) when listening that user terminal sends report message to network device in three-layer, multicast device in two-layer determines whether there is multicast group list item and multicast forwarding list item in the multicast group; if no, then carrying out step (2); (2) receiving data stream of the multicast group, the multicast device in two-layer creates multicastgroup list item and multicast forwarding list item based on the data stream. The invention also discloses multicast device in two-layer composed of multicast information control unit and multicast message control unit. The invention solves issue of impacting hardware and software of multicast device caused by that users order program of multicast group repeatedly or by turns.

Description

technical field [0001] The invention relates to multicast technology in the field of communication, in particular to a method for forwarding multicast flow in a layer-2 multicast device and the layer-2 multicast device. Background technique [0002] With the continuous development of multimedia technologies such as streaming media, video TV, and video conferencing in the network, IP multicast technology has become an important content in the Internet. The principle of implementing the multicast technology method in the prior art is as follows: [0003] Use IGMP (Internet Group Management Protocol, Internet Multicast Management Protocol) or MLD (Multicast Listener Discovery, Multicast Listener Discovery) to maintain multicast group relationships. IGMP (in IPv4) or MLD (in IPv6) runs at the end of the network to communicate with users On the Layer 3 network device directly connected to the terminal, it is used to dynamically manage the multicast user terminal joining or leavi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/08H04L12/56H04L45/16
Inventor 哈达
Owner XINHUASAN INFORMATION TECH CO LTD