Method for presetting fail-safe path of bit index display replication multicast

A technology for protecting paths and paths, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as complex operation processes

Active Publication Date: 2020-06-12
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

On the basis of the original BIER forwarding rules, this method adds new entries such as BRFT and BTAFT, and greatly changes the original forwarding rules, and the operation process is complicated; in addition, this method has certain limitations for ring topology

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  • Method for presetting fail-safe path of bit index display replication multicast
  • Method for presetting fail-safe path of bit index display replication multicast
  • Method for presetting fail-safe path of bit index display replication multicast

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] In order to solve the failure of BIER multicast link, the present invention proposes a method for pre-configuring the protection path. The first link and the second path are selected to calculate a preset circle sequence, and the multicast working tree and protection path are calculated according to the preset circle sequence. Configure the working path as a working entry in the BIFT table, and configure the protection path as a protection entry in the BIFT table.

[0032] Such as figure 1 Shown is the overall flowchart of the method. In step (101), the first link is selected, the second path is calculated, and the preset circle sequence is calculated. For the detailed calculation process, see figure 2 The flow chart of the algorithm is shown. In step (102) according to preset circle sequence, calculate the working tree of multicast, this part is ...

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Abstract

The invention discloses a method for presetting a fail-safe path of bit index display replication multicast. The invention discloses a method for presetting a protection path of a risk link in bit index display replication, and belongs to the technical field of multicast. The method comprises the steps that a network node with the minimum identification value serves as an initial node, a first link is selected to calculate a first preset circle, a second path or a second link is selected to calculate a subsequent preset circle, and a preset circle sequence is obtained; a multicast working treeand a protection path of a risk link are calculated according to the directivity of the preset circle; and a BIER routing table is generated according to the work tree and the protection path. The method is beneficial to rapid rerouting of BIER link faults in multicast communication.

Description

technical field [0001] The invention relates to a method for presetting a fault protection path for bit index display duplication multicast, and belongs to the field of multicast technology. Background technique [0002] Bit-indexed explicit replication (BIER) technology is a new multicast technology, which replaces the core network part of the multicast bearer network with the BIER domain. The BIER domain includes Bit Forwarding Ingress Router (BFIR), Bit Forwarding Router (BFR) and Bit Forwarding Egress Router (BFER). When the BFIR in the BIER domain sends a multicast packet to the BFER in the BIER domain, the bit forwarding router identity (BFRid) information of the BFER is encoded into the bit string (BitString) in the BIER header of the multicast packet. BFR in the BIER domain creates a bit index forwarding table (BIFT), and BFR replicates and forwards multicast packets according to BitString and BIFT in multicast packets (see IJ.Wijnands and E.Rosen, Multicast Using B...

Claims

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Application Information

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IPC IPC(8): H04L12/703H04L12/741H04L12/761H04L12/24H04L45/28H04L45/16H04L45/74
CPCH04L45/16H04L45/28H04L45/54H04L41/12
Inventor 王文鼐庄金成吴炜赵光陶建波王斌
Owner NANJING UNIV OF POSTS & TELECOMM
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