Terminal Connection Settings for Faster Conditional Handover
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in executing setting processing for conditional handover and secondary cell addition or change, particularly in reducing the time lag between quality degradation and actual handover, and there is a lack of clarity in the execution procedure using common reference and delta configurations.
Innovation Solution
A terminal apparatus is equipped with an obtaining unit to gather setting information for multiple cells, including a common reference configuration and delta configurations, and executes conditional handover or secondary cell changes based on these configurations when predetermined conditions are met, ensuring efficient management of wireless connection settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If setting processing is executed in advance for conditional handover, then the time lag between quality degradation and handover is reduced, but the device complexity increases due to managing reference and delta configurations
Solution Approach 1:
The configuration information is segmented into two parts: reference configuration (common to multiple cells) and delta configuration (cell-specific differences). This segmentation allows the terminal to store and process only the essential differences rather than complete configurations for each cell, reducing memory requirements and processing complexity while enabling fast conditional handover execution.
Solution Approach 2:
The reference configuration and delta configurations are prepared and stored in advance before handover is needed. When quality degradation occurs, the terminal can immediately apply the pre-configured settings by combining the reference configuration with the appropriate delta configuration, eliminating the need for real-time configuration processing and thus reducing handover time lag.
2Manufacturing precision
If complete configuration information is transmitted for each cell, then the execution accuracy of handover settings is improved, but the data transmission volume increases
Solution Approach 1:
The invention extracts only the differential information (delta configuration) that is specific to each cell, separating it from the common reference configuration. This extraction approach allows the network to transmit minimal data (only the differences) while the terminal reconstructs complete cell-specific configurations by combining the reference configuration with the extracted delta information, thus maintaining accuracy while reducing data transmission volume.
3Speed
If the terminal apparatus autonomously executes conditional handover, then the response speed to quality degradation is improved, but the reliability may be reduced due to lack of base station coordination
Solution Approach 1:
The base station pre-configures and signals the reference configuration and delta configurations to the terminal in advance, establishing a coordinated framework before autonomous execution is needed. This preliminary coordination ensures that the autonomous handover decisions made by the terminal are based on network-approved configurations, maintaining reliability while enabling fast response when quality degradation occurs.
Data Source
AI summary
A base station apparatus obtains information for generating setting information related to a plurality of cells for a conditional handover (CHO) or a conditional secondary cell addition or change (CPAC) in a terminal apparatus, the information including a reference configuration, which is common to two or more cells among the plurality of cells and to which identification information uniquely specifying the reference configuration is allocated, delta configurations that are respectively specific to the two or more cells, and the identification information of the reference configuration to be combined with the delta configurations, provides the terminal apparatus with the information and a condition under which the CHO or the CPAC is to be executed, and designates at least one configuration to be deleted or changed and instructs the deletion or the change to the terminal apparatus.