Optical Transmission Device Wavelength Limit Control
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Solution Overview
Problem
Current OADM devices lack an upper limit for operational wavelengths, leading to potential deterioration in transmission characteristics and increased costs due to the need for additional devices to restrict wavelengths, without considering individual network environments or optimizing wavelength allocations.
Innovation Solution
An optical transmission device with an upper limit value storage section, acceptance section, and license determination section that allows for dynamic adjustment of operational wavelengths within predetermined limits, using a license function to restrict and manage wavelengths, thereby optimizing network performance without additional costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the upper limit value of operational wavelengths of OADM device is increased to meet hardware performance, then the device capacity is improved, but the transmission characteristics deteriorate and optical fibers may be damaged
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the upper limit value of operational wavelengths based on the actual number of wavelengths in use. The license determination section modifies the effective upper limit parameter (from hardware maximum to operational maximum) according to network conditions, ensuring it never exceeds the safe threshold that would damage optical fibers while allowing maximum utilization of available wavelengths.
2Reliability
If extra dedicated devices such as network management device and relaying device are added to restrict wavelengths, then the wavelength restriction function is achieved, but the device complexity and cost increase
Solution Approach 1:
The OADM device performs wavelength restriction functions autonomously through its own license determination section, eliminating the need for separate network management devices or relaying devices. The device self-monitors the number of operational wavelengths and self-enforces the upper limit restriction, achieving wavelength management functionality while reducing overall system complexity and cost.
Solution Approach 2:
The patent merges the wavelength restriction function into the existing OADM device structure by integrating the license determination section within the device. This combines multiple functions (optical signal transmission, path type setting, and wavelength number restriction) into a single device, eliminating the need for separate dedicated restriction devices and reducing system complexity.
3Reliability
If the number of operational wavelengths is restricted to prevent fiber damage, then the transmission safety is improved, but the network optimization for individual environments is lost
Solution Approach 1:
The patent implements dynamics by making the upper limit value of operational wavelengths adjustable rather than fixed. The license determination section dynamically sets the effective upper limit based on the actual number of wavelengths in use and compares it against the safe threshold, allowing the system to adapt to different network environments and configurations while maintaining transmission safety.
Data Source
AI summary
An optical transmission device that is connected to transmission paths of a network, that performs optical communication according to a wavelength division multiplex format and that transmits optical signals over the transmission paths according to path types that have been set to wavelengths of the optical signals, including an upper limit value storage section that stores an upper limit value of the number of operational wavelengths that is the number of wavelengths to which the path types are set; an acceptance section that accepts a changing request that requests that the number of operational wavelengths be changed; and a license determination section that decides the number of operational wavelengths, wherein if the number of wavelengths that has been changed according to the accepted changing request is equal to or smaller than the stored upper limit value, the license determination section newly sets the changed number of wavelengths for the number of operational wavelengths.