Conditional Configuration Management in User Equipment
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in conditional handover and secondary node addition/change procedures due to latency and improper configuration management, leading to network inefficiencies and increased radio link failures.
Innovation Solution
Implementing techniques that allow user equipment (UE) to determine whether received configurations from the base station should be added as new or modify existing configurations, using configuration identifiers to manage conditional procedures, and providing a full set of conditional configurations to avoid ambiguity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If immediate SN addition/change procedures are used without conditional checks at UE, then configuration management is simpler, but latency increases and procedure failure probability increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring conditional handover parameters and candidate target cell information at the UE before actual handover is needed. The source base station prepares handover configuration data including multiple candidate targets and their associated conditions, storing them in the UE's buffer. When handover is triggered, the UE can immediately execute based on pre-evaluated conditions, eliminating the need for real-time signaling exchange during the handover moment, thus reducing latency while maintaining reliability through pre-validated configurations.
2Reliability
If conditional procedures with UE-checked conditions are implemented, then handover failure risk is reduced, but configuration management complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the handover configuration into multiple independent candidate target cell configurations, each with its own evaluation conditions and execution parameters. Instead of managing one complex conditional handover configuration, the UE receives and stores multiple segmented configurations for different candidate targets. Each configuration is self-contained with specific measurement conditions, making the overall system more manageable while improving reliability through diversified handover options.
Solution Approach 2:
The patent applies inversion by reversing the traditional handover control flow. Instead of the network controlling handover execution and the UE passively following commands, the patent enables the UE to autonomously evaluate pre-configured conditions and independently decide when to execute handover to which candidate target. This inversion of control authority reduces network signaling overhead and simplifies real-time configuration management while maintaining high reliability through UE-based conditional evaluation.
3Measurement precision
If configuration identifiers are used to track and manage conditional configurations at UE, then configuration accuracy improves, but messaging overhead increases
Solution Approach 1:
The patent applies taking out by extracting the configuration identification function from detailed configuration data. Instead of transmitting complete handover configuration parameters repeatedly for tracking and management, the patent uses compact configuration identifiers (such as cell IDs or predefined indices) that uniquely represent each candidate target configuration. These extracted identifiers are embedded in measurement reports and handover execution messages, enabling accurate configuration tracking with minimal messaging overhead while maintaining precise configuration identification.
Data Source
Figure 1A
Figure 1B
Figure 1C~2
AI summary
Base stations and user devices (UEs) of this disclosure implement techniques for managing conditional configurations, which enable a UE to determine whether, when the UE receives a conditional configuration from a base station of a RAN, the UE should add the received configuration as a new configuration, or instead use the received configuration to modify an existing configuration. In different implementations, the RAN may provide the UE with configuration identifiers for this purpose, or may provide the UE with a full list of conditional configurations each time the RAN configures the UE for a conditional procedure.