L1/L2 Triggered Mobility Configuration for Complete Cell Switching
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Solution Overview
Problem
The challenge in wireless communication systems is determining the time point for forming a complete configuration and performing compliance checks during mobility operations triggered by lower layers, as well as identifying the appropriate unit of configuration to be stored in UE variables.
Innovation Solution
A method and device are provided to manage lower layer triggered mobility by obtaining an L1/L2 reference configuration and candidate configurations, determining completeness based on an indicator, and applying a radio resource control reconfiguration message when necessary to ensure a complete configuration is formed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If configuration information for lower layer triggered mobility is transferred to a terminal, then mobility operations can be performed, but determining the time point for forming complete configuration and performing compliance checks becomes complex
Solution Approach 1:
The network side performs preliminary actions by providing reference configuration information and candidate configuration information in advance before the terminal needs to perform mobility operations. This allows the terminal to have configuration options ready, reducing the complexity of real-time configuration management during mobility operations.
Solution Approach 2:
The configuration information is segmented into different types: reference configuration information, candidate configuration information, and indication information. This segmentation allows the terminal to process different configuration elements separately and systematically, making the overall configuration management less complex.
2Adaptability or versatility
If multiple LTM candidate configurations are provided to the terminal, then mobility flexibility is improved, but determining completeness and managing configuration units becomes more difficult
Solution Approach 1:
The network side provides indication information that serves as feedback to the terminal, explicitly indicating which candidate configuration should be used and whether it is complete. This feedback mechanism eliminates the difficulty for the terminal to determine configuration completeness on its own, as the network side has the authoritative view of configuration status.
Solution Approach 2:
The indication information acts as an intermediary between the network side's configuration knowledge and the terminal's configuration application. Instead of requiring the terminal to independently analyze configuration completeness, the indication information mediates this information, simplifying the terminal's task.
3Extent of automation
If the terminal determines configuration completeness independently, then autonomy is improved, but accuracy of compliance checks may be insufficient
Solution Approach 1:
The indication information serves as an intermediary that bridges terminal autonomy with network-side accuracy. The terminal maintains autonomy in applying configurations, but the indication information ensures accuracy by providing authoritative guidance on configuration completeness and applicability, which the terminal reliably follows.
Data Source
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AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a terminal in a wireless communication system is provided. The method comprises obtaining, from a base station, an L1/L2 triggered mobility (LTM) reference configuration and one or more LTM candidate configurations; receiving, from the base station, a cell switch command indicating an LTM candidate configuration among the one or more LTM candidate configurations; based on whether a particular indicator is included in the LTM candidate configuration indicated by the cell switch command, determining whether the LTM candidate configuration indicated by the cell switch command is a complete configuration; and in case that the LTM candidate configuration indicated by the cell switch command is not a complete configuration, applying a radio resource control (RRC) reconfiguration message included in the LTM candidate configuration indicated by the cell switch command to the LTM reference configuration.