E-Tree Services Over MPLS and PBB-TE Networks
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Solution Overview
Problem
Current technologies for implementing Ethernet E-Tree services lack standardized methods for transport, leading to inefficiencies in data routing and bandwidth management, particularly in point-to-multipoint topologies like Metro Ethernet networks.
Innovation Solution
The implementation of Ethernet E-Tree services over MPLS and PBB-TE networks using virtual bridges and PBB-TE trunks, which enforce directional traffic exchange rules to prevent direct communication between leaf nodes and ensure efficient data distribution by using multicast addresses and IGMP snooping for dynamic traffic management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Ethernet E-Tree services are implemented without standardized transport methods, then deployment flexibility is maintained, but routing efficiency and bandwidth management deteriorate
Solution Approach 1:
The patent applies parameter changes by defining specific transport parameters for E-Tree services over MPLS and PBB-TE networks. It establishes standardized parameters including label distribution, traffic engineering constraints, and bandwidth management rules that transform the unstandardized deployment into an efficient standardized system while maintaining adaptability through configurable parameters.
Solution Approach 2:
The patent segments the E-Tree service implementation into distinct functional components: root node operations, leaf node operations, transit node operations, and transport network operations. Each segment has standardized protocols and procedures, allowing independent optimization while maintaining overall routing efficiency.
2Ease of operation
If direct communication between leaf nodes is permitted, then communication flexibility increases, but network security and traffic control worsen
Solution Approach 1:
The patent applies asymmetry by creating an asymmetric communication model where root nodes can communicate with leaf nodes, but leaf nodes cannot directly communicate with each other. This asymmetric permission structure maintains network security while providing necessary communication flexibility through the controlled root node interface.
Solution Approach 2:
The patent introduces the root node as an intermediary that mediates all communication between leaf nodes. Instead of allowing direct leaf-to-leaf communication, all traffic must pass through the root node which enforces security policies, thereby maintaining network security while enabling communication flexibility through controlled mediation.
3Reliability
If multicast traffic is distributed to all leaf nodes, then data distribution completeness improves, but bandwidth utilization worsens
Solution Approach 1:
The patent applies partial action by implementing selective multicast distribution where traffic is sent only to leaf nodes that have expressed interest or need for that specific traffic. Instead of excessive distribution to all leaf nodes, the system performs partial distribution to only the necessary subset, improving bandwidth utilization while maintaining data distribution completeness for receiving nodes.
Solution Approach 2:
The patent implements feedback mechanisms where leaf nodes signal their reception needs to the root node, and the root node adjusts multicast distribution accordingly. This feedback loop ensures that multicast traffic is distributed completely to nodes that need it while avoiding unnecessary bandwidth consumption by nodes that do not require the traffic.
4Productivity
If multiple E-Tree services share the same network infrastructure, then resource utilization improves, but service isolation and quality of service worsen
Solution Approach 1:
The patent applies segmentation by dividing the shared network infrastructure into logically separate service instances, each with its own virtual bridges, service instances, and traffic engineering parameters. This segmentation allows multiple E-Tree services to share physical resources while maintaining strong service isolation through virtualization boundaries.
Solution Approach 2:
The patent applies local quality by allowing each E-Tree service to have customized quality parameters, traffic engineering rules, and resource allocation policies specific to its requirements. While sharing the same physical infrastructure, each service maintains its own local quality characteristics, ensuring service isolation and differentiated quality of service.
Data Source
AI summary
An E-Tree is disclosed which includes a root node associated with a Metro Ethernet network. The E-Tree includes a first Virtual Bridge (VB), associated with the root node, which is configured to process Ethernet traffic, and a second node associated with the Metro Ethernet network. The E-Tree includes a second VB, associated with the second node, configured to process Ethernet traffic and having a first connection between the first VB and the second VB. The second VB is configured to be able to send Ethernet traffic to the first VB via the first connection, if appropriate. In the event there is a second connection between the second VB and a third VB and the second connection has been assigned a down direction from the point of view of the second VB, the second VB is not permitted to send traffic received from the second connection to another connection which from the point of view of the second VB has been assigned a down direction.