Method and equipment for transmitting multicast data

A technology of multicast data and transmission method, which is applied in the field of communication, can solve the problems of router specification limitation, BIDIRPIM protocol compatibility, and BIDIRPIM protocol cannot be widely used, etc., and achieve the effect of smooth docking and wide application

Active Publication Date: 2011-06-29
NEW H3C TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] BIDIR PIM has a good application prospect and is suitable for many-to-many multicast application services. However, when deploying the BIDIR PIM protocol, all routers in the network are required to support the BIDIR PIM protocol, which leads to the limitation of the application range of the BIDIR PIM protocol. very restrictive
[0016] 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.

Method used

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  • Method and equipment for transmitting multicast data
  • Method and equipment for transmitting multicast data
  • Method and equipment for transmitting multicast data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Based on the above networking and configuration conditions, such as Figure 4 As shown, when the multicast source (multicast server Server2) is in the PIM-SM domain and the receivers (Client1, Client3) are in the BIDIR PIM domain, the corresponding data transmission process includes:

[0048] Step 101, in the PIM-SM domain, when the designated router S3 receives the multicast data of the multicast group G2 sent by the multicast server Server2, the designated router S3 encapsulates the multicast data into a unicast message through a registration message, and encapsulates The unicast registration message sent to the rendezvous point R1 of the multicast group G2.

[0049] Step 102, after receiving the registration message, the rendezvous point R1 sends (S, G2) join messages to the multicast server Server2 hop by hop. Wherein, the address information of the multicast server Server2 and the address information of the multicast group (the address information of the multicast...

Embodiment 2

[0070] Based on the above networking and configuration conditions, such as Figure 5 As shown, when the multicast source (multicast server Server1) is in the BIDIR PIM domain and the receiver (Client2) is in the PIM-SM domain, the corresponding data transmission process includes:

[0071] Step 201, in the BIDIR PIM domain, the multicast server Server1 sends multicast data to its corresponding designated forwarder R3, and the multicast group address of the multicast data is G1.

[0072] Step 202, R3 sends the multicast data to the rendezvous point R2. In the BIDIR PIM domain, since the rendezvous point is R2, the unicast route from R3 to R2 has an outbound interface pointing to R2, and the neighbor entry maintained by the PIM Hello message also has the above outbound interface pointing to R2. Then R3 can send the multicast data to R2 through the outbound interface pointing to R2.

[0073] In addition, when R3 receives the multicast data, it can create a (*, G) table entry acc...

Embodiment 3

[0108] Based on the same inventive concept as the above method, the embodiment of the present invention also proposes a multicast data transmission device, which is applied to a multicast network including a BIDIR PIM domain and a PIM SM domain, and the transmission device is a BIDIR PIM domain A second device connected to the first device in the PIM SM domain, and the PIM SM protocol is enabled on the second device, and serves as a convergence point in the PIM SM domain, such as Image 6 As shown, the transmission equipment includes:

[0109] Registration message receiving module 11, for receiving the registration message from the designated router of multicast source in PIM SM domain;

[0110] The address information obtaining module 12 is used to obtain the address information of the multicast source and the address information of the first multicast group corresponding to the multicast source from the registration message;

[0111] Add message sending module 13, for sendi...

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Abstract

The invention discloses a method and equipment for transmitting multicast data. The method comprises the following steps that: second equipment receives the registration message of a designated router of a multicast source in a protocol independent multicast-sparse mode (PIM SM) domain, and acquires the address information of the multicast source and the address information of a first multicast group corresponding to the multicast source from the registration message; the second equipment transmits a (S, G) adding message which carries the address information of the multicast source and the address information of the first multicast group through first equipment to the designated router; the second equipment receives the multicast data corresponding to the first multicast group, which comes from the multicast source, from the first equipment; and the second equipment transmits the multicast data to a rendezvous point in a bidirectional protocol independent multicast (BIDIR PIM) domain; or, the second equipment transmits the multicast data to the rendezvous point in the BIDIR PIM domain and a receiver in the BIDIR PIM domain. By using the method and the equipment, a BIDIR PIM protocol can be widely applied.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a method and equipment 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 existing networks. As a communication method alongside unicast and broadcast, multicast The technology can effectively solve the problem of single-point transmission and multi-point reception, thereby realizing efficient data transmission from point to multi-point in the network, saving a large amount of network bandwidth and reducing network load. [0003] Existing multicast generally adopts the PIM (Protocol Independent Multicast, Protocol Independent Multicast) protocol. For large-scale multicast networks, deploying the PIM SM (Protocol Independent Multicast-Sparse Mode, Protocol Independe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/18H04L12/56H04N21/266H04L45/16
Inventor 游君平
Owner NEW H3C TECH CO LTD
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