BIER TE Node Link BP Range Management
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Solution Overview
Problem
Current multicast technologies face inefficiencies and inflexibility in backbone networks due to excessive multicast statuses and complex networking, leading to frequent reconfiguration of link bit positions (BPs) by SDN controllers, which decreases management efficiency and flexibility.
Innovation Solution
A method and device for transmitting bit indexed explicit replication information in BIER TE networks, where nodes transmit and adjust link BP range information using extended protocols, allowing neighboring nodes to manage link BPs independently and reducing the need for frequent SDN controller interventions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SDN controller frequently reconfigures link BPs due to link changes, then network adaptability is improved, but device complexity and management overhead increase
Solution Approach 1:
The patent enables BIER TE nodes to autonomously detect link changes and adjust their own link BP ranges without requiring SDN controller intervention. Each node independently monitors its link status and performs self-reconfiguration, eliminating the need for frequent controller-mediated BP reassignments while maintaining network adaptability
Solution Approach 2:
The patent pre-allocates a range of configurable link BPs to each BIER TE node based on its maximum potential link requirements. This preliminary allocation allows nodes to dynamically select appropriate BPs from their pre-assigned ranges when links are added or removed, avoiding the need for frequent reconfiguration requests to the SDN controller
2Extent of automation
If SDN controller manages all link BP assignments, then centralized control is improved, but productivity and response time deteriorate
Solution Approach 1:
The patent divides the centralized BP management function into two parts: the SDN controller performs initial BP range allocation to each node, while individual nodes independently manage their own BP selections within those ranges. This segmentation allows centralized policy control while enabling distributed rapid response to link changes, significantly improving reconfiguration productivity
Solution Approach 2:
The patent transitions from a static centralized BP assignment model to a dynamic distributed model where nodes can autonomously select and change their link BPs within pre-defined ranges. This dynamic approach enables immediate local response to network changes while maintaining overall centralized coordination through the initial range allocations
3Adaptability or versatility
If link BP ranges overlap between neighboring nodes, then routing flexibility is improved, but reliability of traffic forwarding deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where BIER TE nodes exchange link BP range information with their neighbors through routing protocols. When overlap is detected, nodes receive feedback about the conflict and autonomously adjust their BP selections to eliminate overlaps, ensuring reliable traffic forwarding while maintaining routing flexibility through coordinated BP allocation
Data Source
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AI summary
A method and device for transmitting bit indexed explicit replication (BIER) information. The method includes: transmitting (S101), by a node in a BIER traffic engineering (TE) network, link bit position (BP) range information of the node. The link BP range information is a value range of configurable link BPs for forwarding network data traffic.