Hybrid Network LSP Configuration via Switching Type Conversion
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Solution Overview
Problem
Existing methods for establishing label switched paths (LSPs) in hybrid networks require multiple configurations of single switching type LSPs, leading to increased workload and reduced service survivability due to end node conversion nodes, which fail to support seamless rerouting.
Innovation Solution
A method and system that utilize continuous signaling to establish LSPs across different switching types by acquiring idle switching type conversion capability information, reserving bandwidth, and determining intermediate nodes as switching type conversion nodes, thereby reducing configuration workload and enhancing service survivability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple LSPs of single switching type are separately configured in hybrid network, then LSP configuration can be completed, but configuration workload increases manifold
Solution Approach 1:
The patent merges multiple separate LSP configuration processes into a single unified LSP configuration process that can handle multiple switching types simultaneously. The network device configures one LSP that traverses through different switching types (packet switching, TDM switching, optical switching) using continuous signaling, eliminating the need to separately configure multiple LSPs for each switching type segment.
Solution Approach 2:
The patent implements a universal LSP configuration mechanism that can operate across multiple switching types through a common control plane. The signaling protocol is designed to be switching-type-agnostic, allowing the same LSP configuration process to handle packet, TDM, and optical switching segments uniformly, thereby reducing configuration complexity.
2Adaptability or versatility
If conversion node is set as end node of LSP, then switching type conversion can be achieved, but service survivability decreases due to inability to reroute
Solution Approach 1:
The patent segments the LSP into multiple sub-paths, each corresponding to a different switching type segment. The conversion nodes become intermediate nodes where sub-paths are connected, rather than being terminal points. This segmentation allows the LSP to be rerouted by adjusting individual sub-paths while maintaining the overall LSP structure, thereby improving service survivability.
Solution Approach 2:
The patent introduces intermediate conversion nodes that act as mediators between different switching type segments. These nodes perform switching type conversion while remaining part of the continuous LSP path, enabling both conversion functionality and rerouting capability. The intermediary nodes maintain signaling continuity while allowing path flexibility.
3Adaptability or versatility
If manual configuration of conversion nodes is required, then switching type conversion can be implemented, but operation complexity increases
Solution Approach 1:
The patent implements automatic conversion node identification and configuration through continuous signaling between network devices. The system self-determines which nodes should perform switching type conversion based on network topology and capabilities, eliminating manual configuration requirements. The signaling protocol automatically negotiates and configures conversion nodes along the LSP path.
Solution Approach 2:
The patent uses dynamic parameter negotiation through signaling to automatically configure conversion nodes. Network devices exchange capability parameters and topology information, and the system automatically determines optimal conversion node locations based on these parameters. This dynamic parameter-based configuration replaces static manual configuration, reducing operational complexity.
Data Source
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AI summary
In the field of communications technologies, embodiments of the present invention disclose a method and a system for establishing a label switched path LSP, and a node device. An LSP established by means of the solution is an LSP crossing different switching types, and the solution may significantly reduce workload of configuring an LSP in a hybrid network. The method of the embodiments of the present invention includes: acquiring, by a first end node, idle switching type conversion capability information of each node in a network, in which the idle switching type conversion capability information indicates idle bandwidth satisfied by each node and a switching type supported by each node; calculating, by the first end node and according to the idle switching type conversion capability information, to obtain an LSP from the first end node to a second end node, in which the LSP includes at least two LSP sub-paths having different switching types; and reserving, by the first end node, bandwidth for the LSP, and sending, along a direction from the first end node to the second end node, a path establishing request message carrying information of the LSP to an adjacent downstream node of the first end node located on the LSP.