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Method and apparatus for controlling multi-point transmitaion in ether metropolitan network

An Ethernet and multi-point technology, applied in the branch office to provide special service devices, transmission systems, digital transmission systems, etc., can solve problems such as bandwidth efficiency issues

Inactive Publication Date: 2003-06-18
QUALCOMM INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Therefore, providing multicast services other than residential Internet access creates bandwidth efficiency issues

Method used

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  • Method and apparatus for controlling multi-point transmitaion in ether metropolitan network
  • Method and apparatus for controlling multi-point transmitaion in ether metropolitan network
  • Method and apparatus for controlling multi-point transmitaion in ether metropolitan network

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Embodiment Construction

[0032] The method and apparatus of the present invention involves introducing a separate multicast VLAN tag for multicast transmissions at the metropolitan access node, each BRAS or edge router uses the multicast VLAN tag for its downstream multicast transmissions, and when associated with When used in conjunction with IGMP snooping, multicast VLAN tags prevent duplication of multicast transmissions.

[0033] For ordinary unicast transmission, ordinary VLAN tags are still used to ensure client isolation and security. Therefore, a VLAN tag is added on the city access node according to a conventional method, and the VLAN tag is sent to the service provider access server or BRAS.

[0034] However as shown in Figure 2, for multicast transmissions, a separate multicast VLAN tag is introduced as a multicast index for all users or clients 1, 2 using the same access server 17 or edge router 17 connected to the MAN . The MAN manages to provide the different city access nodes 13 with ...

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Abstract

Method and apparatuses for directing multicast traffic in an Ethernet network include sending a multicast message upstream to a metro access node, performing IGMP snooping at the metro access node and assigning a multicast VLAN tag to the multicast message, performing IGMP snooping at an Ethernet switch disposed upstream to determine each port used for a corresponding multicast group address and multicast VLAN tag associated with the multicast group address, receiving the multicast message at an access server or edge router and sending the multicast message including the multicast group address and the multicast VLAN tag, downstream to a port based on that information, thereby avoiding duplication of the multicast message to another port other than the port associated with the multicast VLAN tag.

Description

technical field [0001] The present invention relates to preventing occurrence of Duplication of multicast transmissions, controlling multicast transmissions for different service providers and improving bandwidth efficiency. Background technique [0002] All types of Local Area Networks (LANs) conform to the IEEE 802 standard and can be connected together with a Media Access Control (MAC) bridge. Various LANs can be grouped together to form a virtual LAN (VLAN). A VLAN group consists of a logical workgroup including users that can be physically separated from each other. The IEEE 802.1Q standard defines the operation of VLAN bridges, which allow the definition, operation and management of VLAN topologies within bridged LAN infrastructures. VLANs provide privacy and security for members of workgroups, and provide broadcast domains so that broadcast transmissions are kept within the VLAN. [0003] Through E-MAN, users connect to the Internet or corporate environment at hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/18H04L12/46H04L29/06
CPCH04L12/4645H04L63/104H04L63/0272H04L12/1886
Inventor 斯文·乌海克里斯蒂安·马里·阿德林·胡布雷特德克·尤金·伊达·乌姆斯
Owner QUALCOMM INC
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