Optical Cross-Connection Node Using Dynamic Spectrum Allocation
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Solution Overview
Problem
Current methods for establishing optical cross-connections in wavelength division multiplexing networks require manual configuration by network management systems, leading to complex implementation and low reliability due to fixed spectrum resource allocation, which wastes resources and reduces utilization.
Innovation Solution
A method and system that automatically determine the number of subcarriers, spectrum bandwidth, and overlap or non-overlap of spectrum resources between neighboring subcarriers to establish a multi-carrier optical cross-connection, using a node device to send and receive messages to select available center frequencies and establish connections based on non-overlapping or overlapping spectrum ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual configuration is used to establish multi-carrier optical cross-connection, then flexibility in spectrum bandwidth allocation is improved, but implementation complexity increases and reliability decreases
Solution Approach 1:
The patent implements automatic configuration where the optical cross-connection node autonomously determines subcarrier parameters, selects available center frequencies, and establishes connections without manual intervention. The system self-services by automatically managing spectrum resource allocation based on service requirements, thereby reducing implementation complexity while maintaining flexibility.
Solution Approach 2:
The patent dynamically adjusts key parameters including the number of subcarriers, spectrum bandwidth of single subcarrier, and center frequencies based on service requirements and available resources. This parameter adaptation enables flexible spectrum allocation while the automated parameter management reduces implementation complexity.
2Ease of manufacture
If fixed spectrum intervals are used for connections, then implementation is simplified, but spectrum resource utilization decreases
Solution Approach 1:
The patent transitions from fixed static spectrum intervals to dynamic flexible grid spectrum allocation. The system dynamically adjusts spectrum bandwidth and subcarrier parameters according to service requirements, improving spectrum resource utilization while maintaining implementation feasibility through automated management.
Solution Approach 2:
The patent segments the optical spectrum into flexible subcarrier channels that can be independently configured. By dividing the spectrum into adjustable subcarrier units rather than fixed intervals, the system enables fine-grained spectrum allocation that improves utilization while keeping implementation manageable through standardized segmentation.
3Measurement precision
If manual configuration is used for optical cross-connection, then control precision is improved, but reliability decreases due to human error
Solution Approach 1:
The patent implements automated feedback mechanisms where the system queries available center frequencies from neighboring nodes, validates spectrum resource availability, and adjusts configuration parameters accordingly. This closed-loop feedback process ensures configuration precision while eliminating human error, thereby improving reliability.
Solution Approach 2:
The patent replaces manual mechanical configuration operations with automated electronic control systems. The automated system electronically determines parameters, selects frequencies, and establishes connections, maintaining precision while improving reliability by eliminating human intervention and associated errors.
Data Source
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AI summary
The present invention relates to the network communication field, and discloses a method for establishing an optical cross-connection. The method includes: determining, by a first node, the number of subcarriers, spectrum bandwidth of a single subcarrier, and non-overlap of spectrum resources between neighboring subcarriers of a connection; obtaining, by the first node, a first set of available center frequencies of a first link according to the spectrum bandwidth of a single subcarrier; sending, by the first node, a request message to a neighboring node in a direction from the first node to a second node, where the request message carries at least the number of subcarriers, information on the spectrum bandwidth of a single subcarrier, subcarrier overlap attribute information, and information on the first set of available center frequencies; receiving, by the first node, a response message, and obtaining a set of center frequencies of the subcarriers of the connection; and establishing an optical cross-connection based on a spectrum range determined according to non-overlap of spectrum resources between neighboring subcarriers, the set of center frequencies of the subcarriers, and the spectrum bandwidth of a single subcarrier. Further, embodiments of the present invention disclose a system and a node device for establishing an optical cross-connection.