Server Switching Decision Using Allowable Delay Satisfaction Duration
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Solution Overview
Problem
Existing service control systems face frequent server switching and service interruptions when terminal devices move, leading to user dissatisfaction and potential accidents due to inadequate consideration of terminal movement in server switching and virtual environment reconstruction.
Innovation Solution
A service control system that includes a server switching decision unit and a server decision unit, which determine whether to switch servers and select a switching destination based on an allowable delay satisfaction duration, ensuring the service can be provided within an acceptable delay time, thereby reducing frequent server switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If server switching is performed based on current delay time only, then the allowable delay time is satisfied at the switching moment, but frequent server switching occurs when the terminal device moves, causing service interruptions
Solution Approach 1:
The patent applies preliminary action by evaluating the allowable delay satisfaction duration before server switching occurs. The server selection unit predicts how long the selected server can maintain acceptable delay performance given the terminal's movement characteristics. This advance evaluation prevents frequent switching by selecting servers that will satisfy delay requirements for an extended future period, not just at the moment of switching.
Solution Approach 2:
The patent implements dynamics by considering the terminal device's movement state (speed, direction, trajectory) to dynamically adjust server selection criteria. The system adapts the server choice based on predicted future positions and delay characteristics, transforming a static switching decision into a dynamic, forward-looking process that accounts for terminal mobility patterns.
2Reliability
If the physical resource closest to the network edge is selected, then the delay requirement is satisfied at the time of switching, but frequent virtual environment reconstruction is required when the terminal moves to areas served by different base stations
Solution Approach 1:
The management device performs preliminary evaluation of the allowable delay satisfaction duration before constructing or switching virtual environments. By predicting how long a selected physical resource will maintain acceptable delay performance as the terminal moves, the system avoids frequent virtual environment reconstruction while still satisfying delay requirements throughout the service period.
3Loss of time
If server switching is performed frequently to maintain low delay time, then the delay time remains within allowable limits, but service interruptions and user dissatisfaction increase
Solution Approach 1:
The system performs preliminary evaluation of the allowable delay satisfaction duration to determine the optimal switching threshold. Instead of switching at every delay threshold violation, the system selects servers that will maintain acceptable delay for a predicted extended period, reducing switching frequency while preserving delay performance and service stability.
Data Source
AI summary
A server switching decision unit decides whether to switch a server that provides a service to a service-utilizing terminal that receives the service from the server. In a case in which the server switching decision unit makes a decision to switch the server, the server decision unit decides a server of a switching destination from among a plurality of servers that are able to provide the service to the service-utilizing terminal in consideration of an allowable delay satisfaction duration indicating a length of time during which the service can be provided to the service-utilizing terminal with a delay time within an allowable delay time.