Wavelength Selective Device Resource Recycling
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Solution Overview
Problem
In optical networks, wavelength resources are often wasted due to inefficient configuration of new paths, where unused wavelengths are not effectively reassigned, leading to depletion of available resources.
Innovation Solution
A wavelength-selective device that manages wavelengths using a storage-based wavelength management table to search for paths with specific ending times, select the most suitable wavelength for new paths, and efficiently configure and release wavelength resources, preventing resource depletion by prioritizing wavelengths with ending times closest to the new path's requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a path using the shortest wavelength is selected from among wavelengths currently being used by further paths, then the wavelength resource utilization is improved, but wavelengths that are allowed to be used are not properly considered, leading to potential conflicts with existing path configurations
Solution Approach 1:
The patent applies preliminary action by checking whether a wavelength is allowed to be used for a new path before selecting it, based on the ending time of the new path. The system determines in advance whether a wavelength currently in use can be reassigned by comparing time parameters, ensuring that reassignment only occurs when it will not conflict with existing path configurations. This prevents invalid path configurations while maximizing wavelength reuse.
2Productivity
If wavelength resources are not efficiently reassigned, then the configuration process is simple, but wavelength resources are wasted and become depleted
Solution Approach 1:
The patent implements feedback by continuously monitoring the usage status of wavelengths and dynamically adjusting assignments based on ending times. The system collects information about current wavelength usage, evaluates whether reassignment is possible based on time constraints, and makes decisions accordingly. This feedback mechanism enables efficient wavelength recycling without requiring overly complex manual configuration processes.
Solution Approach 2:
The patent applies parameter changes by using the ending time parameter as the basis for wavelength selection. Instead of static wavelength assignment, the system dynamically selects wavelengths based on time-related parameters (ending times of new and existing paths). This parameter-driven approach enables automatic, efficient wavelength recycling while keeping the configuration process relatively simple and rule-based.
3Productivity
If paths are configured without considering ending times, then the configuration is faster, but wavelength resources cannot be recycled efficiently
Solution Approach 1:
The patent applies preliminary action by evaluating the ending time of the new path before wavelength assignment and comparing it with the ending times of existing paths. This preliminary time-based assessment determines whether a wavelength can be safely reassigned without waiting for complex real-time monitoring during path execution. The configuration decision is made in advance based on time parameter comparison, enabling efficient recycling without significant configuration delays.
Data Source
AI summary
A wavelength-selective device includes: a storage in which a wavelength management table is stored; and a processor configured to execute a procedure, the procedure including: searching for one or more paths used as a new path having a first ending time in a network, based on the wavelength management table; selecting a wavelength having a second ending time closest to the first ending time, from one or more wavelengths used on paths found by the searching; and configuring a path using the selected wavelength as the new path.