Class-Based Flow-Subcarrier Mapping in Optical OFDM
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Solution Overview
Problem
Optical OFDM systems face challenges in efficiently mapping data flows to subcarriers, particularly in managing data flows with varying predictable data rates and protection needs within optical communication networks, which affects network throughput and security.
Innovation Solution
Class-based flow-subcarrier mapping (CFSM) strategy that categorizes data flows into four types based on protection needs and data rate predictability, assigning them to different subcarrier groups for exclusive or shared transmission, optimizing subcarrier utilization and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data flows are mapped to subcarriers using a uniform strategy, then the system is simple to operate, but network throughput and resource utilization are reduced due to inability to differentiate between different flow types
Solution Approach 1:
The patent segments data flows into different types (e.g., elastic vs. inelastic flows) and assigns them to different subcarrier groups. This segmentation allows the system to handle different flow types with appropriate strategies, improving overall network throughput while maintaining manageable complexity through systematic classification.
Solution Approach 2:
The patent implements dynamic flow-subcarrier mapping where the mapping strategy adapts based on flow type characteristics. The system dynamically selects between exclusive mapping (for elastic flows) and shared mapping (for inelastic flows), enabling the system to optimize performance for different traffic conditions without requiring complex manual configuration.
2Reliability
If data flows requiring protection are transmitted together on all subcarriers, then resource utilization improves, but security and protection are compromised
Solution Approach 1:
The patent segments subcarriers into different groups based on the protection requirements of data flows. Flows requiring protection are assigned to specific subcarrier groups that provide isolation from other flows, ensuring security while still achieving efficient resource utilization through dedicated allocation.
Solution Approach 2:
The patent applies different transmission strategies to different subcarrier groups based on local requirements. Protected flows receive exclusive access to specific subcarriers where they are the only traffic, providing localized security guarantees, while other subcarriers can be shared for maximum utilization.
3Reliability
If data flows with unpredictable data rates are assigned to dedicated subcarriers, then protection and reliability improve, but subcarrier utilization decreases due to idle capacity
Solution Approach 1:
The patent segments flows with unpredictable data rates into a specific category and assigns them to dedicated subcarrier groups. This segmentation ensures they receive protection while the system can still optimize overall utilization by allowing other flow types to share different subcarrier resources.
Solution Approach 2:
The patent changes the mapping parameter from uniform allocation to type-based allocation. By modifying how subcarriers are assigned based on flow characteristics rather than using a fixed strategy, the system achieves both protection for unpredictable flows and improved overall utilization through adaptive resource distribution.
Data Source
AI summary
Each of a plurality of data flows is classified as having a respective data flow type, and each data flow is assigned to one of a plurality of subcarrier groups, based on the data flow's type, wherein each subcarrier group comprises a respective plurality of subcarriers. First data flows assigned to a first subcarrier group are transmitted exclusively on respective subcarriers in the first subcarrier group, and second data flows assigned to a second subcarrier group are transmitted together on all of the subcarriers in the second subcarrier group.