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Method and device for realizing multicast service

A technology of multicast service and implementation method, which is applied in the field of communication and can solve the problems of occupying the capacity of forwarding entries, etc.

Active Publication Date: 2016-03-02
XINHUASAN INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a large number of useless multicast forwarding entries will occupy the tight capacity of forwarding entries

Method used

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  • Method and device for realizing multicast service
  • Method and device for realizing multicast service
  • Method and device for realizing multicast service

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] This embodiment describes the process of establishing a multicast tunnel between the DR on the multicast receiving side and the DR on the multicast source side to implement the multicast service.

[0074] In the embodiment of the present invention, during the networking configuration, the relevant tunnel configuration is performed on the DR connected to the multicast source and the DR connected to the multicast receiving device respectively. The embodiment of the present invention uses the GRE (GenericRoutingEncapsulation) technology to establish a tunnel as an example. In this case, the following tunnel configuration is performed on the DR:

[0075] Create a tunnel interface on each DR, set the IP address of the tunnel interface on each DR, make all the tunnel interface IP addresses in the same network segment, and configure the local LoopBack port of the device as the source address of the tunnel interface. Configure the tunnel mode as multicast GRE.

[0076] When a multica...

Embodiment 2

[0116] This embodiment describes the process of establishing a multicast tunnel between the DR on the multicast receiving side and the DR on the multicast source side to implement the multicast service. The main difference between the second embodiment and the first embodiment is that after receiving the IGMP member report message sent by the multicast receiving device, the DR on the multicast receiving side sends PIM(*, G) to the corresponding multicast group RP in the existing manner. The join message does not carry the multicast GRE tunnel configuration information of the DR on the multicast receiving side and the specific service flag used to identify the round-cut service. Instead, the DR on the multicast receiving side performs SPT after receiving the multicast data message. During the handover, the multicast GRE tunnel configuration information of the DR on the multicast receiving side is carried in the PIM (S, G) join message and sent.

[0117] Specifically, after the DR ...

Embodiment 3

[0123] This embodiment describes the process of establishing a multicast tunnel between the DR and the RP on the multicast receiving side to implement the multicast service.

[0124] In this embodiment, after the DR on the multicast receiving side receives an IGMP member report message carrying a specific service flag, it generates a PIM (*, G) entry with a specific service flag, and judges that it corresponds to the requested join If the multicast group G only has the multicast receiving device for the rotation service and the multicast GRE tunnel has not been established for the multicast group G requested to join, the RP information corresponding to the table entry is searched, and the RP information found Directly initiate a PIM (*, G) join message about multicast group G to the corresponding RP unicast, which carries GRE tunnel configuration information and specific service flags. After the RP receives the PIM (*, G) join message, it initiates the establishment of the multic...

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PUM

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Abstract

The invention discloses a multicast service realizing method and equipment thereof. According to the multicast service realizing method provided by the invention, if a DR (Data Recorder) of an assigned router on a receiving side of a given multicast group only has a receiver of a specific multicast service, a PIM (Protocol Independent Multicast) adding message with a specific service mark and channel configuration information is sent to the upstream after the DR receives a message reported by a member of an IGMP (Internet Group Management Protocol); an intermediate router can only transmit the PIM adding message without establishing a corresponding multicast list item; after the PIM adding message is sent to a DR on a multicast source side, a channel is established through dynamic negotiation of the DR on the multicast source side and the DR on the receiving side; and an outlet interface of the channel is additionally arranged on the DR on the multicast source side. Therefore, multicast data to given multicast group receiving equipment is directly sent to the DR on the receiving side through the channel, and sent to receiving equipment after being unpackaged, so that the occupied rate of list item sources on a multicast transmission link is reduced.

Description

Technical field [0001] The present invention relates to multicast technology in the communication field, in particular to a method and equipment for implementing multicast services. Background technique [0002] IP video surveillance has become the mainstream and future of the security field. In the live on-demand service in the surveillance service, there is a need for multiple on-demand users to watch a certain camera scene at the same time. Obviously, IP multicast is a good way to solve this demand. [0003] figure 1 A typical networking is shown in which the PIM (Protocol Independent Multicast) protocol is enabled on the router. If two surveillance hosts and the TV wall want to broadcast the video stream of the same camera at the same time, then the camera only needs to send out one multicast stream, router Rtr-1 replicates two multicast streams, router Rtr-3 replicates two groups Broadcast. In this way, compared to unicast live on-demand, the pressure on the camera is much...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/70
Inventor 林鹏程周迪
Owner XINHUASAN INFORMATION TECH CO LTD
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