LTM Cell Switch Power Ramping Across UE MAC Cell Groups
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Solution Overview
Problem
Current wireless communication systems face challenges in seamless mobility management, particularly in 5G New Radio (NR), due to complex interactions between MAC entities of different cell groups during LTM cell switch, leading to signaling overhead and latency issues.
Innovation Solution
The proposed method and system retain the same preamble power ramping counter when the random access procedure is initiated by the PDCCH order for an LTM candidate cell in a different cell group, and share the status of PDCCH order reception with UE MAC entities, ensuring efficient power management during LTM cell switch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If power ramping counter is reset for each LTM cell switch, then power management is simplified, but signaling overhead and latency increase
Solution Approach 1:
The patent applies preliminary action by retaining the power ramping counter value across LTM cell switches instead of resetting it. The counter is maintained in the MAC entity and preserved during cell group changes, allowing the power ramping process to continue from where it left off rather than starting over, thereby reducing signaling overhead and latency while avoiding the need for complex re-initialization procedures.
2Reliability
If MAC entities share PDCCH order reception status, then communication synchronization is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback by having MAC entities share the reception status of PDCCH orders. The MAC entity in the source cell group provides feedback information about PDCCH order reception to the MAC entity in the target cell group, enabling synchronized communication and coordinated power ramping across cell group boundaries without requiring complex centralized control.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments herein provide a method and system for performing a power ramping for early timing advance synchronization in a communication system.