WDM Network Wavelength Dimensioning with Blocking Thresholds
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing WDM optical networks face challenges in efficiently determining the number of wavelengths needed for links, especially in dynamic networks without wavelength conversion, which leads to over-dimensioning and inefficiency, and fail to account for different classes of users with varying quality of service requirements.
Innovation Solution
A method that calculates the number of wavelengths for each link in WDM optical networks with wavelength continuity constraint by determining blocking probabilities and iteratively adjusting wavelengths to ensure each connection's blocking probability meets its threshold value, using Dijkstra's algorithm and layer-based calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If homogeneous dimensioning is used to simplify wavelength assignment, then the network design becomes easier, but the network becomes over-dimensioned and inefficient
Solution Approach 1:
The patent applies local quality by assigning different numbers of wavelengths to different network links based on their specific traffic patterns and blocking probability requirements. Instead of uniform homogeneous dimensioning, each link is dimensioned according to its local characteristics, achieving both simplicity in assignment and efficiency in resource usage.
2Quantity of substance
If the number of wavelengths is reduced to save network resources, then network cost decreases, but blocking probability increases
Solution Approach 1:
The patent changes the parameter of wavelength allocation from uniform to heterogeneous, adjusting the number of wavelengths per link based on calculated blocking probabilities. This allows optimization of the balance between resource quantity and service reliability by assigning wavelengths according to actual network conditions rather than fixed homogeneous standards.
3Speed
If First-Fit wavelength assignment is used to simplify connection routing, then the routing process becomes faster, but it does not account for different user classes with varying QoS requirements
Solution Approach 1:
The patent introduces dynamics by making the wavelength assignment process adaptive to different user classes and QoS requirements. Instead of a static First-Fit approach, the system dynamically adjusts wavelength allocation based on connection characteristics, enabling both speed and adaptability through conditional assignment rules.
Data Source
AI summary
The invention relates to a new method for jointly defining a policy for assigning wavelengths to each network connection and for calculating the number of wavelengths in dynamic WDM optical networks without wavelength conversion. To solve this problem, the method comprises including in each network connection a fixed route for transmitting, which is defined before operating the network. This new approach has two main differences from previous strategies.