Multicast method and multicast route method

Abstract

The invention discloses a multicast method, comprising a process for adding into a multicast group and a process of transmitting the multicast data package, setting a collection for transmitting the multicast data package in a same manner to be a multicast transmitting equivalence class, and in the process for adding into a multicast group, on a network node of a sending tree or a sending sub-tree, establishing a multicast transmitting trutorial message identified by the multicast transmitting equivalence class; and in the process of transmitting the multicast data package, transmitting the multicast transmitting equivalence classes data package of a same group based on the multicast transmitting trutorial messages of the same group. The invention also discloses a multicast method, comprising: setting a collection for transmitting the multicast data package in a same manner to be a multicast transmitting equivalence class, on the network node of a sending tree or a sending sub-tree which multicast transmitting equivalence class belongs to, statically collocating a multicast transmitting trutorial message identified by the multicast transmitting equivalence class, and transmitting the multicast transmitting equivalence classes data package of a same group based on the multicast transmitting trutorial messages of the same group. The invention further discloses a multicast route method.

Description

technical field [0001] The invention relates to network routing and forwarding technology, in particular to a multicast method and a multicast routing method. Background technique [0002] In current network applications, multimedia services such as video are increasingly important, and multicast technology is an important bearing technology for network multimedia services. Multicast is a one-to-many or many-to-many multi-party communication form. Such as figure 1 In the multicast model shown, the path of the video stream in the network forms a tree structure, and the same video stream is transmitted on each branch of the tree, and copied at the fork of the tree, so that the The video stream is sent to all receivers, and this tree is called the distribution tree. The multicast routing protocol first forms a distribution tree, and through the process of transmitting a video stream on each branch of the distribution tree and duplicating at the fork of the tree, the video str...

AI Technical Summary

Problems solved by technology

As a result, in the routers of the distribution tree, different multicast groups occupy a large number of states, which mainly include multicast routing entries and multicast forwarding entries of different multicast groups, and transmit a large number of protocols message, thus occupying more memory space. At the same time, the router needs to converge each route one by one according to each (S / *, G) state. The route convergence time, that is, the time for route switching is relatively long, and the protocol message The structure and exchange efficiency are relatively low

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