Multi-mode Switching DWDM Traffic Management
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Solution Overview
Problem
Current switching technologies in DWDM networks, such as electronic packet switching, optical circuit switching, and optical burst switching, face challenges in scaling cost-effectively with the number of DWDM channels and cannot meet the diverse needs of heterogeneous applications, particularly in terms of fine packet-level granularity and latency sensitivity.
Innovation Solution
A multi-mode switching approach that enables dynamic packet traffic management in DWDM networks by using a traffic management module to process data for transmission in electronic packet switching (EPS), optical burst switching (OBS), and optical circuit switching (OCS) modes, allowing each wavelength to be configured individually for optimal switching based on application requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electronic packet switching (EPS) is used to provide fine packet-level granularity, then packet-level control and latency sensitivity are improved, but system cost increases significantly due to required O/E/O conversion for each DWDM channel
Solution Approach 1:
The patent segments the switching function into two parts: optical circuit switching for bulk data transmission and electronic packet switching for control plane operations. This segmentation allows packet-level granularity to be provided only where necessary (control plane) while keeping the data plane cost-effective through optical switching.
Solution Approach 2:
The patent introduces an intermediary control plane that mediates between the optical data plane and electronic packet switching. The control plane uses electronic packet switching to provide fine granularity control, while the data plane uses optical circuit switching to avoid costly O/E/O conversion for every channel.
2Device complexity
If optical circuit switching (OCS) is used to reduce system cost, then cost-effectiveness is improved, but adaptability to diverse heterogeneous applications deteriorates due to coarse wavelength-level granularity
Solution Approach 1:
The patent makes the switching mode dynamic by allowing the control plane to establish different types of connections (wavelength-level for OCS, packet-level for EPS) based on application requirements. This dynamic adaptability enables the system to switch between coarse and fine granularity as needed.
Solution Approach 2:
The patent creates a universal switching system that can handle both optical circuit switching and electronic packet switching through a unified control plane. This multi-functionality allows the same infrastructure to support diverse applications with different granularity requirements.
3Quantity of substance
If the number of DWDM channels is increased to scale the network, then network capacity is improved, but the number of required O/E/O pairs increases linearly, worsening system cost
Solution Approach 1:
The patent replaces the mechanical O/E/O conversion system with an optical switching system for the data plane. This substitution eliminates the need for O/E/O conversion for each DWDM channel, allowing network capacity to scale without linear cost increase.
Solution Approach 2:
The patent uses optical switching to create lightpaths that copy the functionality of electronic packet switching at the optical layer. This allows multiple DWDM channels to be handled by a single optical switching fabric rather than requiring separate O/E/O pairs for each channel.
Data Source
AI summary
A Wavelength Division Multiplexing (WDM) multi-mode switching system and method and method provides concurrent switching in various switching modes including, but not limited to, an electronic packet switching (EPS) mode, optical circuit switching (OCS) mode, and optical burst switching (OBS) mode. Edge routers in the WDM multi-mode switching systems may provide a traffic management module that processes incoming data and routes the data for transmission in an electronic packet switching (EPS), optical burst switching (OBS), or optical circuit switching (OCS) modes via a WDM link.