Base Station Conditional Cell Addition Using Reference and Delta Configs
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Solution Overview
Problem
The execution procedure for setting processing using a common reference configuration and delta configurations for conditional handover or secondary cell addition/change in wireless communication systems is unclear, necessitating an efficient method for establishing this process.
Innovation Solution
A method involving a base station apparatus and a terminal apparatus that obtain and provide information for generating setting information using a reference configuration and delta configuration for conditional handover or secondary cell addition/change, with the terminal apparatus executing the CPAC when conditions are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If setting processing is executed using a common reference configuration and delta configurations for multiple candidate cells, then the efficiency of wireless connection management is improved, but the execution procedure becomes unclear and complex
Solution Approach 1:
The patent segments the setting information into a common reference configuration that applies to multiple candidate cells and cell-specific delta configurations that provide differences from the reference. This segmentation allows efficient processing by avoiding redundant information transmission while maintaining clear execution procedures through structured organization of configuration data.
Solution Approach 2:
The patent implements preliminary action by having the base station apparatus prepare and transmit the reference configuration and delta configurations in advance before the terminal apparatus needs to execute the actual connection switching. This allows the terminal to have all necessary setting information ready when conditions are met, streamlining the execution process.
2Reliability
If handover setting processing is started after communication quality degradation occurs, then the core network can control the handover, but the time period for communication interruption or insufficient quality is prolonged
Solution Approach 1:
The patent enables preliminary action by allowing the terminal apparatus to execute conditional handover or secondary cell addition/change based on pre-configured reference and delta settings before actual communication degradation occurs. The base station transmits the configuration information in advance, and the terminal autonomously executes the handover when conditions are met, eliminating the delay between degradation detection and handover execution.
3Loss of information
If the base station apparatus transmits complete setting information for each candidate cell, then the terminal apparatus has all necessary information, but the data transmission volume increases
Solution Approach 1:
The patent extracts only the necessary difference information (delta configurations) from the complete cell settings and transmits this along with the common reference configuration. Instead of transmitting complete setting information for each candidate cell, the system extracts and transmits only the variations from the reference, significantly reducing data transmission volume while maintaining information completeness for all candidate cells.
Solution Approach 2:
The patent merges the common reference configuration that applies to all candidate cells with individual delta configurations into a unified transmission structure. This combining approach allows the terminal apparatus to reconstruct complete setting information for multiple candidate cells from a single reference and a set of differences, reducing redundant data transmission while preserving full information completeness.
Data Source
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AI summary
A base station apparatus is a base station apparatus that obtains information for generating setting information related to a candidate cell targeted for a conditional secondary cell addition or change (CPAC) in a terminal apparatus that is currently connected to the base station apparatus, the information including a reference configuration and a delta configuration that corresponds to a difference between the setting information and the reference configuration, and provides the terminal apparatus with the information and a condition under which the CPAC is to be executed.