Cell Level Mobility Timing Advance Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The 5G communication system faces challenges in cell level mobility due to the introduction of new services like network energy saving and non-terrestrial networks, which require enhanced conditional reconfiguration to manage changes in network nodes covering geographical areas quickly.
Innovation Solution
The method involves receiving a Radio Resource Control (RRC) message for cell level mobility, determining whether to perform a first type or second type mobility, and adjusting uplink transmission timing using specific timing advance numbers based on parameters within the RRC message, ensuring accurate cell reconfiguration and mobility management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If network nodes change frequently to support new services like network energy saving and non-terrestrial networks, then service adaptability is improved, but mobility management complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring conditional reconfiguration parameters and timing advance values before network node changes occur. The UE is provided with multiple timing advance values in advance, enabling it to quickly adjust uplink transmission timing when network nodes change, thus reducing the complexity of real-time mobility management while maintaining high service adaptability.
2Speed
If conditional reconfiguration is enhanced to handle rapid network changes, then mobility responsiveness is improved, but timing synchronization accuracy deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically selecting from multiple pre-configured timing advance values based on the specific network node change scenario. Instead of using a single fixed timing advance value, the system changes the timing parameter according to the actual network conditions, enabling both rapid response to mobility events and accurate timing synchronization through intelligent parameter selection.
Data Source
AI summary
A method and apparatus to support cell level mobility is provided. Method for supporting cell level mobility includes receiving a Radio Resource Control (RRC) message for cell level mobility, determining whether to perform a first type cell level mobility or a second type cell level mobility and performing the first type cell level mobility in case that the RRC message comprises the second parameter for timing advance. The uplink transmission timing in the second cell is determined based on a first timing advance number and a second timing advance number. The first timing advance number is determined based on the first parameter for timing advance. The second timing advance number is determined based on the second parameter for timing advance.