Optical Transport Apparatus Dynamic Wavelength Defragmenting
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Solution Overview
Problem
The optical transport apparatus faces inefficiencies due to fixed optical wavelength assignments, leading to underutilization of radio and optical resources, as it is challenging to dynamically adjust transmission bandwidths, resulting in reduced transport efficiency when free bands occur in optical wavelengths.
Innovation Solution
The apparatus employs a wavelength selective switch and a processor to dynamically adjust transmission bands and center wavelengths, allowing for the reassignment of optical wavelengths based on the frequency changes of radio signals, thereby optimizing resource utilization and improving transport efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed wavelength filter (AWG) is used to assign optical wavelengths to ports, then the device structure is simple and stable, but the transmission bandwidth cannot be dynamically changed, leading to free bands in optical wavelengths and reduced transport efficiency
Solution Approach 1:
The patent replaces the fixed AWG filter with a wavelength selective switch that enables dynamic adjustment of transmission bandwidths. The processor controls the WSS to flexibly allocate optical wavelengths to ports based on actual traffic needs, eliminating free bands and improving transport efficiency while maintaining reasonable device complexity through software-controlled optimization.
Solution Approach 2:
The patent changes the key parameter from fixed wavelength assignment to dynamically adjustable wavelength allocation. By controlling the WSS to adjust transmission bandwidths and center wavelengths according to traffic demands, the system optimizes resource utilization and eliminates the free band problem inherent in fixed AWG-based systems.
2Quantity of substance
If optical wavelengths are assigned in a fixed manner, then the device operation is simple, but resource utilization decreases when free bands occur, leading to underutilization of radio and optical resources
Solution Approach 1:
The patent implements a feedback mechanism where the processor monitors the usage status of optical wavelengths and radio frequencies, then dynamically adjusts the WSS configuration to eliminate free bands. This closed-loop control optimizes resource utilization by continuously adapting wavelength allocations to actual traffic patterns while maintaining automated operation that does not significantly increase operational complexity.
Solution Approach 2:
The system transitions from static wavelength assignment to dynamic wavelength allocation controlled by the processor. The WSS is adjusted in real-time based on traffic demands, enabling flexible resource allocation that maximizes utilization of both radio and optical resources while maintaining automated operation.
3Adaptability or versatility
If the transmission bandwidth is fixed for each port, then the device structure is simple, but it is difficult to adapt to changing traffic demands, resulting in free bands and reduced resource utilization
Solution Approach 1:
The patent replaces the fixed bandwidth structure with a dynamic bandwidth allocation system using WSS. The processor controls the WSS to adjust transmission bandwidths per port based on real-time traffic demands, enabling the system to adapt flexibly to changing conditions while maintaining manageable device complexity through centralized control.
Solution Approach 2:
The wavelength selective switch serves multiple functions: it performs wavelength routing, bandwidth adjustment, and resource allocation optimization. This multi-functional component enables the system to adapt to various traffic patterns and demands while consolidating control functions that would otherwise require multiple separate devices.
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 solution enhances the utilization ratio of radio and optical resources by dynamically managing bandwidth and wavelength allocation, improving transport efficiency and reducing power consumption by associating frequency and wavelength adjustments with signal status.
Implementation Method 1
transmit an arbitrary optical wavelength from the optical multiplexed signal passing through ports by using a wavelength selective switch that has the ports respectively connected to the communication units
Data Source
AI summary
A processor of an optical transport apparatus is configured to transport an optical multiplexed signal between the optical transport apparatus and a counterpart apparatus by using a plurality of communication units; transmit an arbitrary optical wavelength from the optical multiplexed signal passing through ports by using a wavelength selective switch that has the ports respectively connected to the communication units; control a radio unit in the counterpart apparatus so as to change a frequency of the radio signal in the specified optical wavelength; and change a transmission band of the port through which the optical wavelength passes, according to a change of the frequency of the radio signal. The processor is configured to control an optical transmission unit of the counterpart apparatus so as to change a center wavelength of an optical wavelength passing through the port to a center wavelength of the changed transmission band of the port.