Conditional Handover Signaling Reduces Overhead in 5G Networks
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing handovers in 5G networks, particularly in configuring candidate target cells and performing conditional handovers, which can lead to increased signaling overhead and reduced handover success rates due to inadequate identification and configuration of candidate cells.
Innovation Solution
A method and device for performing conditional handovers in wireless communication systems, where a user equipment (UE) receives a radio resource control (RRC) reconfiguration message from a base station including conditional configuration information, such as identification information for candidate cells, allowing for the evaluation and application of candidate cell configurations based on trigger conditions, thereby optimizing handover processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conditional handover configuration is performed with detailed candidate cell information, then handover success rate is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the necessary identification information (candidate cell ID) from the full candidate cell configuration, allowing the UE to identify candidate cells without receiving complete configuration details for each candidate. This reduces the amount of signaling data transmitted while maintaining the ability to perform successful handovers.
Solution Approach 2:
The network pre-configures candidate cell IDs and associated configuration information in advance before handover is needed. The UE stores these preliminary configurations and can quickly reference them when handover conditions are met, avoiding the need for extensive real-time signaling during the actual handover process.
2Reliability
If candidate cell configurations are managed with full configuration details, then handover reliability is improved, but system complexity increases
Solution Approach 1:
The patent separates the candidate cell identification function from the full configuration management. Only essential identification parameters (candidate cell IDs) are managed in the signaling process, while detailed configurations are handled separately or pre-stored, reducing the complexity of configuration management during handover operations.
Solution Approach 2:
The handover configuration is segmented into multiple components: candidate cell ID identification (handled in signaling), and detailed configuration parameters (handled separately or pre-configured). This segmentation allows the system to manage complexity by handling different aspects of handover configuration through different mechanisms.
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). According to embodiments, a method performed by a user equipment (UE) in a wireless communication system, the method comprises: receiving, from a base station, a radio resource control (RRC) reconfiguration message including conditional configuration information, wherein the conditional configuration information includes: identification information for a candidate cell; and a configuration of the candidate cell; and performing one or more operations for a conditional handover based on RRC reconfiguration message.