PWE3 Bundling Interface Sub-Channel Labeling
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Solution Overview
Problem
Current edge to edge pseudo wire emulation (PWE3) technologies cannot establish one-to-one link path negotiation across a packet switching network (PSN) due to the inability of inner labels to distinguish corresponding member interfaces, limiting the bundling interface's ability to provide PWE3 services.
Innovation Solution
A system and method that includes a bundling interface creating module, a bundling parameter negotiating module, and a sub-channel number assigning module to create and negotiate bundling interfaces, using label distribution protocol (LDP) and sub-channel numbers to differentiate member interfaces and ensure successful bundling interface establishment across the PSN.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If point-to-point pseudo wire (PW) is established between provider edge devices (PEs) using label distribution protocol (LDP) or resource reservation protocol (RSVP), then the PWE3 service can be provided over PSN, but the inner label cannot distinguish the corresponding member interface, preventing one-to-one link path negotiation across the PSN
Solution Approach 1:
The patent segments the label structure into outer label and inner label, where the outer label identifies the PW and the inner label identifies the specific member interface. This segmentation allows the system to maintain both PW-level routing and member interface-level differentiation simultaneously, enabling one-to-one link path negotiation across the PSN while preserving PWE3 service capability.
2Productivity
If link bundling technology is used to improve physical bandwidth, then high bandwidth and low cost are achieved, but the bundling interface cannot complete one-to-one link negotiation across the PSN due to label limitation
Solution Approach 1:
The patent introduces the inner label as an intermediary element between the outer label (PW identifier) and the member interface identifier. This inner label acts as a mediator that carries the member interface identification information through the PSN, enabling reliable one-to-one link negotiation while maintaining the high bandwidth benefits of link bundling technology.
3Productivity
If the bundling interface is created with multiple member interfaces to increase bandwidth, then the physical bandwidth is improved, but the member interface status cannot be maintained across the PSN without one-to-one link negotiation
Solution Approach 1:
The patent adds another dimension to the label structure by introducing the inner label as a separate identification layer. This dimensional addition allows the system to simultaneously manage multiple member interfaces within a single PW context, maintaining interface status across the PSN while preserving the ease of operation associated with bundled interface management.
Data Source
AI summary
A method and system for performing edge to edge pseudo wire emulation of the bundling interface in telecommunication field. The method includes: assigning the sub-channel number for the established member bundling interface and negotiating the bundling parameter; forwarding the user message through the aforementioned established bundling interface; and sending the message to the corresponding member interface based on the sub-channel number.