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Multicasting in a provider backbone bridge network

A backbone bridge and backbone technology, applied in the field of communication networks, can solve the problems of not allowing clients to multicast services, service reduction, loss, etc.

Active Publication Date: 2011-11-16
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This does not allow the distinction of client multicast services in the backbone, and severely limits the ability to curtail those services
Client multicast frames associated with the same backbone I-SID are always mapped to the same backbone multicast service, and correspondingly the ability to individually control each such multicast service in the backbone is lost

Method used

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  • Multicasting in a provider backbone bridge network
  • Multicasting in a provider backbone bridge network
  • Multicasting in a provider backbone bridge network

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0024] The present invention introduces a new parameter on each VIP port on the I module, which may be, for example, a binary parameter, referred to herein as the "EnableCustomerMulticast" parameter. By default, each VIP port has this parameter set to zero (0). If this parameter is set to one (1), then each client multicast frame forwarded to this VIP is encapsulated with a backbone MAC destination address equal to the multicast C-DA address. All other Provider Instance Port (PIP) functions remain the same as described in IEEE Std 802.1ah-2008.

[0025] figure 2 is a flow chart illustrating the steps of one embodiment of the method of the present invention in which a B-DA is set for frames sent out by PIP. At step 21, a customer network port (CNP) on an I-component receives a frame that is forwarded to a virtual instance port (VIP) on the same I-component. In step 22, the I component analyzes the received frame. In step 23, it is determined whether the connection_identifi...

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Abstract

Disclosed are a method and Provider Backbone Bridge, PBB, (50) for handling customer multicast frames that are received by the Customer Network Port or Provider Network Port (51) on an I-component of the PBB. Instead of encapsulating these frames with a Backbone Destination Address, B-DA, that is equal to the Default Backbone Destination address, multicast customer frames that are forwarded to a Virtual Instance Port, VIP, on the I- component are encapsulated (26) with a B-DA equal to the original Customer Destination Address, C-DA1 of the received customer multicast. This capability may be controlled by an 'EnableCustomerMulticast' parameter (56) enabling the above behavior to be independently set for each VIP on the I-component.

Description

[0001] related application [0002] This application claims the benefit of US Provisional Application No. 61 / 120640, filed December 8, 2008. technical field [0003] The present invention relates generally to communication networks, and in particular to methods and nodes in communication networks for multicasting in a Provider Backbone Bridge Network (PBBN). Background technique [0004] Multicast is the preferred method for distributing Internet Protocol Television (IPTV) to residential users. The Internet Group Management Protocol (IGMP) is an IP-based control protocol for signaling membership of end stations to multicast groups (TV channels) in bridged networks. In order to obtain the benefits associated with multicasting, IGMP snooping can be used by intermediate nodes to prune the multicast tree in the network in order to efficiently utilize limited resources. [0005] IGMP snooping is designed to prevent hosts on the local network from receiving traffic from multicas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/46H04L12/18
CPCH04L12/4625H04L65/4076H04L29/06455H04L12/1836H04L65/611H04L12/18
Inventor P·萨尔奇迪斯M·方丹
Owner TELEFON AB LM ERICSSON (PUBL)