Virtual Network QoS Control for Multi-Flow Degradation Timing
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Solution Overview
Problem
Existing methods for virtual network control fail to minimize QoS degradation when control actions with different execution times coexist, leading to prolonged degradation in multiple flows.
Innovation Solution
A control system that includes a QoS estimation unit, a QoS degradation detection unit, and a control determination unit to optimize control execution timing and content to minimize total QoS degradation time across all flows using mathematical optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control actions with different execution times are performed sequentially for each flow, then individual flow control can be completed, but the total QoS degradation time increases when multiple flows experience degradation simultaneously
Solution Approach 1:
The patent merges multiple control actions for different flows into a unified optimization problem. The control determination unit solves a single optimization problem that simultaneously determines control contents and execution timings for all flows experiencing QoS degradation, rather than handling each flow separately. This combining approach enables coordinated control that reduces the total QoS degradation time across all flows.
Solution Approach 2:
The patent introduces dynamic execution timing for control actions. Instead of fixed or sequential timing, the optimization problem dynamically determines the execution timing of each control action based on the specific conditions and interdependencies of multiple flows. This dynamic timing adjustment allows the system to optimize the overall QoS degradation time by strategically sequencing and overlapping control actions.
2Reliability
If control execution timing is optimized for one flow, then QoS degradation for that flow is minimized, but other flows may experience prolonged degradation
Solution Approach 1:
The optimization problem serves a universal function by simultaneously addressing QoS degradation for multiple flows. The control determination unit formulates an objective function that aggregates QoS degradation metrics across all flows, enabling a single control decision to benefit multiple flows rather than requiring separate optimization for each flow.
Solution Approach 2:
The system performs preliminary analysis by the QoS degradation detection unit to identify all flows experiencing degradation before the control determination unit formulates the optimization problem. This preliminary detection enables the system to proactively plan control actions that prevent or minimize degradation across all affected flows simultaneously, rather than reacting to each flow independently.
Data Source
AI summary
In a control system for controlling a network providing a service by using a virtual network function, the control system includes: a QoS estimation unit configured to estimate QoS at a current time of each flow in the network on a basis of observation information of the network; a QoS degradation detection unit configured to determine whether or not there QoS degradation flow is present on a basis of an estimation result by the QoS estimation unit; and a control determination unit configured to determine a control content and an execution timing thereof by solving an optimization problem with minimizing a total of degradation amounts in a time range from the current time to future for all flows as an objective function when the QoS degradation flow is determined to be present by the QoS degradation detection unit.