Interconnected Ring Protection Bandwidth Utilization
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Solution Overview
Problem
The existing MPLS ring protection schemes suffer from low bandwidth utilization rates, with actual utilization being only 50% for internal ring protection and 25% for end-to-end cross-ring services, due to the need for separate bandwidth allocation for work and protection rings.
Innovation Solution
The proposed method for interconnected ring protection does not require establishing an end-to-end protection tunnel for cross-ring services, allowing for the reservation of protection bandwidth and improving utilization by forwarding cross-ring services between intersection nodes without establishing a dedicated end-to-end tunnel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate bandwidth allocation for work and protection rings is implemented, then reliability of transmission is improved, but bandwidth utilization rate deteriorates
Solution Approach 1:
The patent merges the protection functions of multiple rings by establishing a protection tunnel that spans across interconnected rings rather than requiring separate protection paths within each individual ring. This allows bandwidth resources to be shared and utilized more efficiently across the network while maintaining transmission reliability through the unified protection mechanism.
Solution Approach 2:
The protection tunnel established in the patent serves multiple rings simultaneously, providing universal protection functionality across interconnected rings. Instead of dedicating separate protection bandwidth to each ring, a single protection tunnel can protect multiple service streams across multiple rings, thereby improving overall bandwidth utilization while maintaining reliability.
2Reliability
If end-to-end protection tunnel is established for cross-ring services, then protection of cross-ring services is improved, but bandwidth utilization rate deteriorates
Solution Approach 1:
The patent extracts the protection function from the traditional end-to-end protection tunnel approach and implements it through a more flexible mechanism that allows protection without requiring dedicated end-to-end tunnels. This extraction enables the separation of protection functionality from rigid tunnel structures, allowing for more efficient bandwidth utilization while maintaining service protection.
Solution Approach 2:
The patent introduces dynamic bandwidth allocation and protection switching mechanisms that allow the network to adaptively utilize bandwidth based on actual service requirements. Instead of statically allocating bandwidth for end-to-end protection tunnels, the system dynamically adjusts resource allocation, enabling higher bandwidth utilization while maintaining protection capabilities for cross-ring services.
Data Source
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Figure 5a
AI summary
The present invention discloses a method, an apparatus and a system for interconnected ring protection, relates to the communication field, realizes the protection of the interconnected ring network using a narrow bandwidth, and improves the bandwidth utilization rate. The method of the present invention comprises: a first intersection node in an intersection node group receiving an cross-ring service, the first intersection node determining an off-ring node of the cross-ring service on a second ring according to service information of the cross-ring service; and if the first intersection node does not communicate with the off-ring node of the cross-ring service on the second ring, and the first intersection node is not the last intersection node, the first intersection node forwarding the cross-ring service to a second intersection node.