Conditional PCell/PSCell Changes With Reserved Configurations
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Solution Overview
Problem
Existing 5G wireless communication systems face challenges in efficiently managing conditional primary cell (PCell) and secondary cell (PSCell) additions and changes, leading to increased signaling overhead and connection interruptions during handover procedures, particularly in scenarios involving fast UE movements.
Innovation Solution
Implementing enhanced conditional PCell/PSCell addition and change procedures by reserving and dynamically selecting candidate cells, allowing UEs to apply stored configurations without full reconfiguration, thereby reducing signaling overhead and enabling faster cell changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full reconfiguration procedures are used for PCell/PSCell addition and change, then connection reliability is improved, but signaling overhead increases and connection interruptions occur
Solution Approach 1:
The patent applies preliminary action by pre-configuring and storing candidate PCell/PSCell configurations in the UE before handover is needed. When handover is required, the UE can immediately apply the pre-stored configuration without waiting for full reconfiguration signaling, thus reducing signaling overhead and connection interruption time while maintaining connection reliability through the use of pre-validated candidate cells
2Productivity
If conditional PCell/PSCell addition and change procedures are implemented, then mobility management speed is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the handover process into distinct phases: configuration storage phase (where candidate PCell/PSCell configurations are pre-stored in the UE) and execution phase (where the UE applies the stored configuration when conditions are met). This segmentation allows mobility management to proceed quickly without requiring complex real-time decision-making, as the UE simply follows pre-determined configuration instructions
Solution Approach 2:
The patent applies self-service by enabling the UE to autonomously apply pre-stored PCell/PSCell configurations based on predefined conditions without requiring continuous network control signaling. The UE independently evaluates whether execution conditions are met and automatically applies the appropriate configuration, reducing the need for complex network-UE coordination and simplifying the overall system while improving mobility management speed
Data Source
AI summary
Methods and apparatuses for enhanced conditional PCell/PSCell addition and changes in a wireless communication system. A method of a UE comprises: receiving reservation information including an indication; determining, based on the indication, whether a candidate PCell/PSCell is reserved; storing, based on a determination that the candidate PCell/PSCell is reserved, the reservation information, CG information and one or more execution conditions associated with the reserved PCell/PSCell; retrieving, after performing a first UE operation, the stored CG information and one or more execution conditions associated with the reserved PCell/PSCell; determining whether one or more execution conditions are met for a reserved PCell/PSCell; and upon determination that one or more execution conditions are met, applying the stored the CG information of the reserved PCell/PSCell to a second UE operation.