NFV Manager Sub-vBRAS Migration for Load Balancing
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Solution Overview
Problem
In Network Functions Virtualisation (NFV) application networking, existing systems face challenges in efficiently managing and balancing the traffic loads across virtual Broadband Remote Access Servers (vBRAS) to optimize network resilience and resource utilization.
Innovation Solution
The NFV Manager implements a method to migrate sub-vBRAS units between vBRASs by selecting source and target vBRASs based on traffic thresholds, transferring relevant data and user assignments, thereby optimizing load balancing and network expansion/contraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If users are assigned to fixed vBRAS instances, then service stability is maintained, but network resilience deteriorates when vBRAS failures occur
Solution Approach 1:
The patent implements dynamic user-vBRAS assignment where users can be migrated between different vBRAS instances based on system conditions. The NFV Manager monitors vBRAS health status and traffic loads, and dynamically reassigns users from failed or overloaded vBRAS to healthy ones, transforming the static assignment model into a dynamic one that adapts to changing network conditions.
Solution Approach 2:
The system establishes a feedback mechanism where the NFV Manager continuously monitors the running state of vBRAS instances and user traffic distribution. Based on this feedback information about vBRAS failures or overload conditions, the manager automatically triggers user migration operations to maintain service quality and network resilience.
2Productivity
If vBRAS service capacity is increased to handle more users, then user access capability is improved, but resource utilization efficiency deteriorates when load is unevenly distributed
Solution Approach 1:
The patent changes the operational parameters of vBRAS instances by dynamically adjusting user assignment based on traffic load conditions. When a vBRAS becomes overloaded, the system migrates users to other vBRAS instances, effectively changing the load parameters across the network to optimize resource utilization while maintaining user access capability.
Solution Approach 2:
The system implements dynamic load balancing where users are automatically migrated between vBRAS instances based on real-time traffic conditions. This dynamic adjustment allows the network to efficiently utilize available vBRAS resources, preventing waste from uneven load distribution while maintaining the capacity to serve all users.
3Adaptability or versatility
If user migration between vBRAS is implemented, then network resilience is improved, but system complexity increases
Solution Approach 1:
The patent introduces an NFV Manager as an intermediary component that handles the complexity of user migration operations. This manager acts as a central controller that monitors vBRAS status, makes migration decisions, and coordinates the actual user assignment changes, thereby isolating the complexity of the migration logic from the vBRAS instances themselves and simplifying the overall system architecture.
Solution Approach 2:
The system maintains virtualization information that essentially copies or replicates the logical state of user assignments across multiple vBRAS instances. This copying mechanism allows the NFV Manager to efficiently track and manage user-vBRAS relationships without requiring complex real-time synchronization, simplifying the migration process by working with replicated state information.
Data Source
AI summary
A NFV Manager receives user traffic notified by each sub vBRAS of each vBRAS. The NFV Manager calculates user traffic of the each vBRAS, selects a source vBRAS and a target vBRAS from all of the vBRASs, selects a migration sub vBRAS needing to migrate from the source vBRAS to the target vBRAS, and notifies the source vBRAS to send data relevant to the migration sub vBRAS to the target vBRAS.