Optical Switch Port Restriction Matrix Compression
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Solution Overview
Problem
Determining optimal routing and wavelength assignment (RWA) in wavelength division multiplexing (WDM) networks is challenging due to the complexity of representing port restrictions and connectivity, particularly in wavelength switched optical networks (WSON) where few optical-electrical-optical (OEO) conversions are desired, leading to increased bandwidth and bidirectional communication requirements.
Innovation Solution
A method involving the creation of a port restriction matrix to efficiently represent port connectivity and wavelength restrictions, which is then compressed and transmitted to a Path Computation Element (PCE) for routing and wavelength assignment, enabling effective RWA in WSON networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detailed port restriction information is represented for each port in WSON networks, then routing and wavelength assignment accuracy is improved, but data transmission complexity and computational burden increase
Solution Approach 1:
The patent combines multiple port restriction parameters (connectivity, wavelength restrictions, OEO conversion requirements) into a unified port restriction matrix. This matrix integrates what would otherwise be separate data structures, reducing the overall complexity while preserving all necessary RWA information. The matrix format allows compact representation of relationships between ports, wavelengths, and switching requirements.
Solution Approach 2:
The patent transforms detailed port restriction data into a standardized matrix format with specific parameters (port indices, wavelength ranges, connectivity flags). This parameter transformation converts complex textual or structured descriptions into a compact numerical representation that is easier to transmit and process, while maintaining the precision needed for accurate RWA computations.
2Reliability
If comprehensive port connectivity and wavelength restriction data is transmitted to PCE, then routing computation accuracy is improved, but network communication overhead increases
Solution Approach 1:
The patent creates a simplified matrix representation that copies only the essential RWA information from the detailed port restriction data. Instead of transmitting complete port configuration details, the system transmits a compressed matrix that captures the critical constraints needed for routing and wavelength assignment, significantly reducing communication overhead while maintaining computation accuracy.
Solution Approach 2:
The port restriction information is segmented into discrete matrix elements that can be independently transmitted and processed. Each matrix entry represents a specific port restriction condition, allowing selective transmission of only the necessary segments of information rather than complete port configurations, thereby reducing overall communication overhead.
3Productivity
If port restriction matrix compression is applied, then data transmission efficiency is improved, but information representation complexity increases
Solution Approach 1:
The patent designs a universal matrix compression format that can represent various types of port restrictions (connectivity, wavelength ranges, OEO requirements) using a single standardized structure. This multi-functional matrix format handles diverse restriction types without requiring separate compression schemes, simplifying the overall system while improving transmission efficiency through consistent formatting and reduced redundancy.
Data Source
AI summary
A network component comprising at least one processor configured to implement a method comprising creating a port restriction matrix comprising a plurality of port restrictions, and compressing the port restriction matrix. Included is a method comprising establishing a port wavelength restriction data for an optical component, establishing a port connectivity data for the optical component, and transmitting the port wavelength restriction data and the port connectivity data to a path computation element. Also included is an apparatus comprising a path computation client configured to communicate data to a path computation element, wherein the data comprises a port restriction data.