Multicast data transmission method and device

Abstract

The invention discloses a multicast data transmission method, which comprises that: a bidirectional protocol independent multicast (BIDIR PIM) Relay receives multicast information from a protocol independent multicast sparse mode (PIM SM) domain; the BIDIR PIM Relay sends the multicast information to equipment connected with the BIDIR PIM Relay in a BIDIR PIM domain according to pre-established neighbourship, wherein the neighbourship is the neighbourship between the BIDIR PIM Relay and the equipment in the BIDIR PIM domain; and the equipment in the BIDIR PIM domain sends the multicast information to an RP in the BIDIR PIM domain, and the RP in the BIDIR PIM domain completes the multicast data transmission process according to the multicast information. In the method, the flexible layout of the BIDIR PIM and the PIM SM is realized, and a BIDIR PIM protocol is widely applied.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for transmitting multicast data. Background technique [0002] With the development of network services such as IPTV (Internet Protocol Television, interactive network television) and video conferencing, multicast services are more and more widely used on the network. As a communication method parallel to unicast and broadcast, multicast technology can It effectively solves the problem of single-point transmission and multi-point reception, thereby realizing efficient data transmission from point to multipoint in the network, saving a large amount of network bandwidth and reducing network load. Use multicast technology to conveniently provide new value-added services, including online live broadcast, Internet TV, distance education, telemedicine, Internet radio, real-time video conferencing and other information services that require high real-time band...

AI Technical Summary

Problems solved by technology

[0007] It can be seen that BIDIR PIM is a relatively new multicast routing protocol and has a good application prospect. However, when deploying the BIDIR PIM protocol, all routers in the network are required to support the BIDIR PIM protocol, which leads to the application of the BIDIR PIM protocol. The range is very limited

In actual use, some routers can only support the PIM SM protocol, and some routers can support the BIDIR PIM protocol, but in the prior art, the PIM SM protocol and the BIDIR PIM protocol are not well compatible, so that the BIDIR PIM protocol It cannot be widely used. In scenarios with a large number of multicast sources, the specifications of routers are greatly restricted due to too many (S, G) entries.

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