L1/L2 Mobility Configuration Handling for Reliable Serving Cell Change
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Solution Overview
Problem
The challenge of incorrect application of configuration information by terminals during L1/L2 mobility can lead to failures in serving cell change, particularly in R17 and R18 NR mobility scenarios where L1/L2 mobility commands are introduced.
Innovation Solution
A method and apparatus for processing configuration information, involving receiving RRC messages with candidate cell configurations, and performing application and storage operations to clarify terminal behavior, including replacing, adding, deleting, or saving configuration information based on network indications to ensure correct application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If L1/L2 mobility command is used to instruct UE to perform cell change/addition, then mobility speed and automation are improved, but configuration information processing complexity increases and may lead to serving cell change failure
Solution Approach 1:
The patent applies preliminary action by pre-configuring candidate cell information (PCI, frequency, SSB parameters) before mobility execution. When L1/L2 mobility command is received, the UE can directly use pre-stored configuration information without complex real-time processing, thus resolving the contradiction between fast mobility and processing complexity.
2Reliability
If configuration information of each candidate cell is pre-configured and stored, then mobility reliability is improved, but memory usage and information management complexity increase
Solution Approach 1:
The patent segments configuration information into essential elements (PCI, frequency, SSB parameters) and organizes them by candidate cell. This segmentation allows efficient storage and retrieval, reducing overall information management complexity while maintaining mobility reliability through structured data organization.
Solution Approach 2:
The patent implements discarding and recovering by clearing pre-configured candidate cell information after successful mobility execution. This prevents accumulation of redundant configuration data, managing information volume efficiently while ensuring reliable mobility through timely updates of relevant configuration parameters.
3Reliability
If terminal incorrectly applies configuration information, then serving cell change fails, but system complexity increases due to need for error prevention mechanisms
Solution Approach 1:
The patent applies feedback by using RRC reconfiguration messages to confirm and update configuration information with the network. This feedback mechanism ensures correct application of configuration data without requiring complex local error prevention logic, as the network validates and corrects configuration information.
Solution Approach 2:
The patent implements preliminary anti-action by validating configuration information through network-provided indicators (e.g., candidate cell lists, frequency point indications) before application. This preliminary validation prevents incorrect configuration application without adding complex error prevention mechanisms at the UE side.
Data Source
AI summary
The present disclosure provides a method for processing configuration information about layer1/layer 2 (L1/L2) mobility, an apparatus and a storage medium, a radio resource control (RRC) message transmitted by a network device is received, where the RRC message includes configuration information of each candidate cell pre-configured and related to L1/L2 mobility; application and/or storage operation(s) is performed on the configuration information of each candidate cell. The application operation and/or storage operation(s) performed by the terminal on the configuration information of each candidate cell can be defined, and the specific application operation and/or storage operation(s) to be performed can be agreed in advance, or appropriate application operation and/or storage operation(s) can be selected according to specific circumstances, to clarify the specific behavior of the terminal after receiving the configuration information of each candidate cell pre-configured and related to L1/L2 mobility.