Reliability-Aware Virtual Network Embedding in Elastic Optical Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current optical communication networks face inefficiencies in handling dynamic and heterogeneous traffic demands due to fixed-grid spectrums, leading to resource wastage and increased complexity in ensuring reliability for virtual network slices, especially in elastic optical networks supporting 5G wireless networks.
Innovation Solution
A method for reliability-aware virtual network embedding onto elastic optical networks, which involves embedding virtual nodes and links onto substrate optical nodes and links while ensuring that in case of path failures, the remaining paths can provide bandwidth equal to or greater than the primary demand, using integer linear programming and heuristic approaches to optimize resource allocation and frequency slot allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated backup paths are provisioned for each virtual link to ensure reliability, then network reliability is improved, but resource overhead increases significantly
Solution Approach 1:
The patent merges backup resources for multiple virtual links by allowing shared use of substrate paths. Instead of dedicating separate backup paths for each virtual link, the system enables multiple virtual links to share common backup resources, reducing overall resource overhead while maintaining reliability guarantees through resource pooling and coordinated failure recovery mechanisms
Solution Approach 2:
The patent implements dynamic resource allocation where backup resources are not statically assigned but dynamically activated based on actual failure conditions. The system monitors network state and selectively activates backup paths only when failures occur, allowing resources to be efficiently utilized during normal operation while providing reliability assurance when needed
2Device complexity
If fixed-grid spectrum allocation is used, then network simplicity is maintained, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent segments the fixed-grid spectrum into finer granular frequency slots, allowing more flexible allocation units. By dividing the spectrum into smaller, manageable segments, the system enables precise matching of bandwidth allocations to actual traffic demands while maintaining the structured organization of grid-based allocation, thus improving utilization without excessive complexity
Solution Approach 2:
The patent changes the spectral allocation parameter from fixed grid sizes to variable granular slots, enabling dynamic adjustment of allocation units based on traffic requirements. This parameter change allows the network to adapt spectrum allocation to match heterogeneous traffic patterns, improving resource utilization efficiency while maintaining manageable system complexity through standardized slot-based management
3Reliability
If multiple disjoint substrate paths are provisioned for bandwidth demand, then reliability is improved, but spectrum resource consumption increases
Solution Approach 1:
The patent makes substrate paths multi-functional by enabling them to serve both primary and backup roles for different virtual links. A single substrate path can function as a primary path for one virtual link while simultaneously serving as a backup path for another virtual link, maximizing resource utilization and reducing overall spectrum consumption while maintaining reliability through this universal resource sharing approach
Data Source
AI summary
The disclosed systems, structures, and methods are directed to a method for embedding the virtual network onto the elastic optical network comprising embedding the plurality of virtual nodes onto the plurality of substrate optical nodes in accordance with the plurality of location constraints provisioning the primary bandwidth demand associated with one of the plurality of virtual links connecting a source virtual node to a destination virtual node onto a plurality of disjoint substrate paths connecting a source substrate optical node and a destination substrate optical node, and embedding the one of the plurality of virtual links connecting the source virtual node to the destination virtual node onto the plurality of disjoint substrate paths connecting the source substrate optical node and the destination substrate optical node.