UE Conditional Mobility Information Refresh for Faster Handover
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing UE information after a conditional mobility procedure, leading to potential network and device inefficiencies due to delayed access to preferred configurations and increased power consumption.
Innovation Solution
Implement techniques to efficiently handle UE information, such as preferred configurations and circumstances, after a conditional mobility procedure has been prepared but before the condition is satisfied, by conveying this information to the candidate RAN node or acting upon it within the RAN, including reconfiguration or cancellation of the procedure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conditional mobility procedures are prepared and stored in the UE, then mobility speed and user experience are improved, but device complexity and memory requirements increase
Solution Approach 1:
The patent extracts and removes prepared conditional mobility procedures from the UE memory when they are no longer needed (i.e., when the corresponding SCell is no longer needed). This reduces device complexity and memory requirements while maintaining the benefit of fast mobility when procedures are actually needed.
Solution Approach 2:
The patent prepares conditional mobility procedures in advance and stores them in the UE for later execution. This preliminary action enables fast mobility execution when needed without requiring real-time setup, thus improving mobility speed while managing device complexity through selective preparation.
2Speed
If conditional mobility procedures are prepared and stored in the UE, then mobility speed and user experience are improved, but power consumption increases
Solution Approach 1:
The patent removes prepared conditional mobility procedures from UE memory when they are no longer needed, reducing the active management overhead and associated power consumption. This selective extraction maintains mobility speed benefits while reducing continuous power usage for maintaining procedure states.
Solution Approach 2:
The patent performs preliminary preparation of mobility procedures only when actually needed (upon receiving configuration from network), rather than maintaining all possible procedures continuously. This reduces power consumption by avoiding continuous maintenance of unused procedures while still enabling fast mobility when required.
3Reliability
If the network configures multiple SCells for the UE, then network coverage and service reliability are improved, but the risk of UE storing outdated mobility information increases
Solution Approach 1:
The patent implements a feedback mechanism where the network monitors UE storage status and explicitly triggers the removal of prepared procedures when SCell configurations change. This feedback loop ensures the network maintains awareness of UE state, preventing outdated information storage while preserving service reliability through coordinated management.
Solution Approach 2:
The patent prepares mobility procedures conditionally only when the corresponding SCell is actually configured and needed. When the network reconfigures or releases SCells, it triggers相应的 procedure preparation or removal. This preliminary but conditional approach ensures UE stores only current, valid mobility information, avoiding outdated data while maintaining reliability.
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
A method in a UE communicating with a RAN includes receiving (312A), from the RAN, a conditional configuration and a corresponding condition for a conditional procedure and, after receiving the conditional configuration and the corresponding condition, sending (316 A) UE information to the RAN. The UE information includes information indicative of a preference or circumstance of the UE. The method also includes, after sending the UE information to the RAN, determining (334A) that the corresponding condition is satisfied and, after determining that the corresponding condition is satisfied, again sending (320A) the UE information to the RAN.