Conditional Handover Preparation to Reduce 5G Service Interruptions
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Solution Overview
Problem
Existing wireless communication systems face challenges in ensuring reliable and efficient handovers, particularly in 5G networks operating at higher frequencies, where rapid signal degradation due to obstacles leads to increased mobility issues and potential service interruptions during handovers.
Innovation Solution
Implementing a conditional handover (CHO) mechanism where user equipment (UE) immediately decodes and applies a target cell configuration upon receiving a reconfiguration message, without waiting for the conditional handover execution condition to be fulfilled, allowing simultaneous data transmission with the source cell and preparation for the target cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user equipment waits for the conditional handover execution condition to be fulfilled before applying the target cell configuration, then the handover execution is more reliable, but the service interruption time increases
Solution Approach 1:
The user equipment performs preliminary decoding of the target cell configuration upon receiving the reconfiguration message, before the conditional handover execution condition is fulfilled. This early preparation reduces the time required when the handover is actually executed, thereby reducing service interruption time while maintaining reliability through the conditional execution mechanism.
2Loss of time
If the user equipment immediately decodes and applies the target cell configuration upon receiving the reconfiguration message, then the service interruption time is reduced, but the complexity of the handover process increases
Solution Approach 1:
The user equipment performs preliminary decoding of the target cell configuration without immediately applying it. The configuration is stored and only applied when the conditional execution condition is fulfilled. This approach reduces service interruption time while managing complexity by maintaining clear conditional logic for when the configuration becomes active.
3Speed
If the user equipment prepares for handover early by decoding the target cell configuration, then the handover execution speed is improved, but the energy consumption increases
Solution Approach 1:
The user equipment performs preliminary decoding of the target cell configuration, which is less energy-intensive than full configuration application. The actual configuration application is deferred until the conditional handover execution condition is fulfilled, balancing handover execution speed with energy consumption by performing only necessary preliminary processing in advance.
Data Source
AI summary
According to an example embodiment, a method may include receiving, by a user equipment from a serving base station associated with a source cell, a reconfiguration message that includes a target cell configuration for a target cell, a configuration of a conditional handover execution condition, and information that indicates that the user equipment should immediately decode and apply the target cell configuration upon receiving the reconfiguration message; and immediately decoding and applying, by the user equipment, the target cell configuration upon receiving the reconfiguration message, without waiting for the conditional handover execution condition to be fulfilled.