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Multicast data transmitting method and equipment

A technology of multicast data and transmission method, applied in the field of communication, can solve the problems of strict equipment requirements, affecting router performance, increasing data packet length and encapsulation overhead, etc., to reduce overhead, improve security, and improve efficiency.

Inactive Publication Date: 2008-04-16
NEW H3C TECH CO LTD
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] When using this method, IPSec and GRE tunnels need to be used in combination, so the data packet needs to be encapsulated multiple times, which increases the length of the data packet and the encapsulation overhead. It affects the performance of routers and reduces the forwarding speed and efficiency of multicast data; in addition, edge routers and central routers must support IPSec and GRE at the same time, so the requirements for equipment are relatively strict

Method used

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  • Multicast data transmitting method and equipment
  • Multicast data transmitting method and equipment
  • Multicast data transmitting method and equipment

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Embodiment Construction

[0062] The core idea of ​​the present invention lies in: establishing an IPSec SA (Security Association, security association) by the edge router and the center router. When a user terminal orders multicast data through the edge router, the edge router initiates a multicast group join to the center router, and the center router maintains the multicast group table entries based on SA; when the center router receives the multicast data, it queries the The multicast group table entry, sends the multicast data to the corresponding edge router through the IPSec tunnel, and the edge router decapsulates the data and forwards it to the receiver.

[0063] In Embodiment 1 of the present invention, a flow chart of a multicast data transmission method is as follows image 3 shown, including the following steps:

[0064] In step s301, the edge router establishes an IPSec SA with the center router.

[0065] The concept of IPSec SA is as follows: IPSec provides secure communication between...

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Abstract

The invention discloses a transmission method for multicasting data, which comprises the steps as follows: an edge router seals a multicasting information of a user terminal and sends to a central router through establishing a IPSec tunnel with the central router beforehand; the edge router receives the multicasting data of the multicasting group which is transmitted by the central router by the IPSec tunnel; the edge router deblocks the multicasting data and sends to the user terminal. Through using the method provided by the invention, a SA and IPSec tunnel is established at the central router and the edge router, which realizes the IP multicasting data directly transmitting on the IPSec tunnel. The expense of GRE tunnel encapsulation in the prior art is reduced. The efficiency of data transmission is improved. In addition, the receiver of the multicasting data is judged in the multicasting group list item of the SA, which improves the security of multicasting data transmission in network.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and equipment for transmitting multicast data. Background technique [0002] IP multicast technology effectively solves the problem of single-point transmission and multi-point reception, and realizes efficient point-to-multipoint data transmission in the IP network, which can greatly save network bandwidth and reduce network load. Using multicast technology, some new value-added services, including Internet information services such as online live broadcast, Internet TV, distance education, telemedicine, Internet radio, and real-time video conferencing, have developed rapidly. [0003] However, in some cases in the real network, the multicast data transmitted in the network does not want to be known by other users who have not applied to join the multicast group. Therefore, how to transmit the multicast data safely and completely through these devices is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/54H04L12/18H04L12/46
Inventor 王连朝周迪
Owner NEW H3C TECH CO LTD
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