Method for multi-cast broadcasting flow distribution node to receive multi-cast broadcasting flow

Abstract

The method includes steps: (1) configuring multicast sources for node of distributing multicast stream; building communication links between node of distributing multicast stream and each multicast source; determining main link path and backup link path in established communication links; collocating identical multicast stream sent from multicast source in main link path and backup link path to node of distributing multicast stream; (2) through the determined main link path, the said node receives multicast stream, and checks whether multicast stream can be received from multicast source through main link path; if yes, receiving operation is continued; otherwise, executing rearranging operation between main link path and backup link path so as to switch the backup link path to as main link path; through the switched main link path, receiving multicast stream. The invention guarantees reliability for transferring multicast stream, and application of dual multicast sources in network.

Description

technical field [0001] The invention relates to multicast technology in the field of communication technology, in particular to a method for a multicast flow distribution node to receive multicast flow. Background technique [0002] Multicast technology is a technology that sends information from one node to multiple receiving nodes. Since multicast technology effectively solves the problem of single-point transmission and multi-point reception, and realizes efficient data transmission from one point to multiple points in the network, it can greatly save network bandwidth and reduce network load. Therefore, the current multicast technology is widely used in audio / video Stream publishing, short message publishing, information bulletins, distance learning, synchronous resources and many other technical fields have been widely used. [0003] When the multicast technology is implemented, the multicast source needs to send the multicast stream to the multicast stream distributio...

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Problems solved by technology

[0006] because figure 2 The backup of the multicast stream shown is realized by backing up the link between the multicast stream distribution node N and the multicast source A. If the multicast source A fails, the multicast stream distribution node N will still be unable to receive to the multicast stream, so the reliability of the multicast stream transmission and the uninterrupted multicast service cannot be effectively guaranteed

[0007] However, if the multicast source is also backed up while the link is backed up, there is no technology that can provide a method for the multicast stream distribution node under the dual multicast source to receive the multicast stream, and the two multicast sources simultaneously After sending the same multicast stream to the same multicast stream distribution node, the multicast stream distribution node will be unable to distinguish which multicast stream to receive, resulting in business disorder

[0008] Therefore, the current method of receiving multicast streams by multicast stream distribution nodes cannot effectively guarantee the reliability of multicast stream transmission and the uninterrupted multicast services

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