Optical Gateway Wavelength Allocation for Bidirectional Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In single-core bidirectional communication, uplink and downlink communications using the same wavelength lead to signal interference due to reflection, and existing optical gateway devices struggle to efficiently allocate wavelengths for optimal communication.
Innovation Solution
The optical gateway device employs a configuration with a first and second multiplexer-demultiplexer, an optical switch, and up-down separators to allocate different wavelengths for uplink and downlink signals, while allowing the same wavelength to be used in the core network, thereby preventing interference and improving wavelength usage efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the same wavelength is used for uplink and downlink communications in single-core bidirectional transmission, then wavelength resources are efficiently utilized, but signal interference occurs due to reflection
Solution Approach 1:
The patent segments the wavelength resources into different groups for uplink and downlink directions. By dividing the available wavelengths into distinct sets (e.g., first wavelength group for uplink, second wavelength group for downlink), the system prevents same-wavelength interference while maintaining efficient resource utilization across the entire spectrum.
Solution Approach 2:
The patent applies different wavelength allocation strategies to different transmission directions. In single-core bidirectional transmission paths, opposite directions use different wavelengths to avoid reflection interference, while in multi-core or unidirectional paths, the same wavelength can be reused. This localized adaptation of wavelength assignment optimizes both interference prevention and resource efficiency.
2Object-affected harmful factors
If different wavelengths are allocated for uplink and downlink in single-core bidirectional transmission, then signal interference is prevented, but wavelength resource utilization decreases
Solution Approach 1:
The patent creates a universal wavelength allocation framework that adapts to different transmission scenarios. The same wavelength can serve multiple functions: it can be used for uplink in one direction, downlink in the opposite direction, or reused in different transmission paths, maximizing resource utilization while preventing interference where necessary.
Solution Approach 2:
The patent extends wavelength resource management into additional dimensions by considering transmission direction, path, and service type. Rather than simply allocating wavelengths statically, the system dynamically assigns wavelengths based on the dimensional context of each transmission, allowing same wavelengths to be reused across different dimensions (directions, paths) while preventing interference within the same dimensional space.
3Device complexity
If fixed wavelength allocation is used in optical gateway devices, then device complexity is reduced, but adaptability to different transmission scenarios decreases
Solution Approach 1:
The patent introduces dynamic wavelength allocation mechanisms that adapt to different transmission scenarios. The optical gateway device can dynamically assign wavelengths based on real-time conditions such as transmission direction, path availability, and service requirements, rather than relying on fixed static allocation. This dynamic approach maintains manageable complexity through automated control while significantly improving adaptability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively prevents signal interference by using different wavelengths for uplink and downlink signals in the service device, while optimizing wavelength usage in the core network by allowing the same wavelength to be used for both directions.
Implementation Method 1
The multiplexer-demultiplexer performs wavelength division multiplexing on a plurality of optical signals having different wavelengths
Data Source
AI summary
An optical switch includes a plurality of fifth ports and a plurality of sixth ports. A plurality of fifth ports of the optical switch are connected to a second ports of a first multiplexer-demultiplexer and a fourth ports of a second multiplexer-demultiplexer. A direction in which a wavelength component of a first wavelength out of an optical signal passing through the first port of the first multiplexer-demultiplexer travels and a direction in which the wavelength component of the first wavelength out of an optical signal passing through the third port of the second multiplexer-demultiplexer travels are opposite to each other.