Conditional Handover in Multi-RAT Dual Connectivity Networks
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Solution Overview
Problem
Current wireless communication systems, particularly in multi-RAT dual connectivity (MR-DC) networks, face challenges in efficiently managing conditional handovers (CHO) due to the lack of dynamic configuration management for secondary cell groups (SCGs), leading to suboptimal handover performance and potential connectivity issues.
Innovation Solution
A method and user equipment (UE) implementation that receives and stores multiple SCG configurations, determining and applying the appropriate configuration based on execution conditions for primary and secondary cells, ensuring seamless handovers by dynamically adapting to satisfied conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple SCG configurations are stored and conditionally applied, then handover reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple SCG configurations and their associated execution conditions before handover is needed. The network provides the UE with a set of candidate SCG configurations and execution conditions in advance, allowing the UE to quickly evaluate and apply the appropriate configuration when conditions are met, thereby improving handover reliability without requiring complex real-time decision-making
Solution Approach 2:
The patent segments the handover configuration into multiple independent SCG configurations, each with its own execution conditions. This allows the UE to evaluate and apply configurations independently based on specific condition satisfaction, reducing the complexity of managing a single monolithic configuration while improving reliability through multiple options
2Stability of the object's composition
If conditional handover with multiple SCG configurations is implemented, then connectivity stability is improved, but processing time increases
Solution Approach 1:
By pre-configuring multiple SCG configurations and their execution conditions before handover is needed, the system eliminates complex real-time evaluation. The UE simply needs to check whether pre-defined conditions are met and apply the corresponding pre-configured SCG, significantly reducing processing time while maintaining connectivity stability through multiple prepared options
3Productivity
If dynamic SCG configuration application is implemented, then handover performance is improved, but system complexity increases
Solution Approach 1:
The patent improves handover performance through dynamic SCG configuration application while managing complexity by using preliminary action. The network pre-provides multiple SCG configurations with execution conditions, and the UE applies the appropriate configuration dynamically based on condition satisfaction. This approach enables flexible, performance-optimized handovers without requiring complex real-time configuration generation or management
Data Source
AI summary
A method performed by a UE for a conditional handover (CHO) in an MR-DC network is provided. The method receives a message including an execution condition for a PCell, a first SCG configuration for a first PSCell, an execution condition for the first PSCell, and a second SCG configuration for a second PSCell. The method stores the first SCG configuration and the second SCG configuration. The method determines whether the execution condition for the PCell is satisfied and whether the execution condition for the first PSCell is satisfied. The method applies the first SCG configuration after determining that the execution condition for the PCell is satisfied and the execution condition for the first PSCell is satisfied. The method applies the second SCG configuration after determining that the execution condition for the PCell is satisfied and the execution condition for the first PSCell is not satisfied.