UE-Based Handover Control for 5G mmWave Stability
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Solution Overview
Problem
In 5G networks, especially those using high-frequency bands like mmWave, frequent handovers between base stations can lead to communication disconnections due to reduced coverage and changing environmental conditions, making seamless communication challenging.
Innovation Solution
A UE-based handover method where the user equipment determines whether to perform a handover by evaluating handover execution conditions received from a source base station, allowing for more control and stability in the handover process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If base station uses mmWave frequency for high-speed communication, then data transmission speed is improved, but coverage area is reduced and handover frequency increases
Solution Approach 1:
The source base station transmits handover execution condition information to the UE in advance before the actual handover occurs. This allows the UE to evaluate conditions and prepare for handover proactively, reducing handover latency and communication disruptions during the transition between base stations with reduced mmWave coverage.
2Adaptability or versatility
If UE moves frequently between base stations, then mobility is improved, but communication connection stability deteriorates
Solution Approach 1:
The system provides the UE with handover execution condition information in advance, enabling the UE to evaluate whether handover conditions are met before actually switching base stations. This proactive evaluation mechanism ensures that handovers occur only when appropriate, maintaining communication stability during frequent UE movement between base stations.
Solution Approach 2:
The UE evaluates handover execution conditions based on received information and provides feedback by determining whether to execute handover. This feedback mechanism allows the UE to make informed decisions about handover timing, ensuring communication connection stability while maintaining mobility in 5G networks with reduced base station coverage.
3Productivity
If handover procedure is performed rapidly, then handover speed is improved, but communication disconnection risk increases
Solution Approach 1:
The source base station transmits handover execution condition information to the UE in advance, allowing the UE to evaluate conditions and prepare for rapid handover execution. This preliminary provision of information enables fast handover while reducing disconnection risks, as the UE can make quick decisions based on pre-received condition data without requiring lengthy base station coordination during the actual handover moment.
Data Source
AI summary
Provided are a method and a device for performing a UE-based handover in a next generation wireless access network. The method of a UE may include receiving, from a source base station, an upper layer signaling including information on UE-based handover command and information on conditions for handover execution; storing a target cell configuration by using the information on conditions for handover execution; and determining whether to perform a handover procedure to a target cell, by determining whether predetermined conditions for handover are satisfied.