Terminal CSI Reporting Across Frequencies During Inter-Cell Mobility
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Solution Overview
Problem
In future radio communication systems, controlling Channel State Information (CSI) measurement and reporting for candidate cells during inter-cell mobility is challenging, which can lead to degraded communication quality if not performed appropriately.
Innovation Solution
A terminal and base station are designed to receive and control CSI measurement and reporting for candidate cells by configuring channel state information resource and report configurations, including L1-RSRP and L1-SINR, to ensure appropriate control during inter-cell mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CSI measurement and reporting is performed for candidate cells during inter-cell mobility, then communication quality is maintained, but system complexity increases due to multiple frequency configurations
Solution Approach 1:
The patent segments the CSI measurement and reporting process by introducing separate configuration structures for different frequency scenarios. The first CSI report configuration is used when a candidate cell is not configured, while the second CSI report configuration is used when a candidate cell is configured. This segmentation allows the system to handle multiple frequency configurations without overwhelming complexity, as each configuration can be independently managed and activated based on the specific scenario.
Solution Approach 2:
The patent implements dynamic configuration switching between different CSI report configurations based on whether a candidate cell is configured. The system can dynamically select which configuration to use (first or second) depending on the inter-cell mobility scenario, allowing flexibility in managing CSI measurement and reporting while adapting to changing system conditions without requiring a fixed complex structure for all scenarios.
2Measurement precision
If separate CSI report configurations are introduced for different frequency scenarios, then measurement precision is improved, but control complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple CSI report configurations in advance, each optimized for specific scenarios. The first CSI report configuration is prepared for cases without candidate cells, and the second is prepared for cases with candidate cells. This preliminary preparation allows the system to switch between configurations without real-time complex decision-making, improving measurement precision while keeping control complexity manageable through pre-established rules.
Solution Approach 2:
The patent changes the configuration parameters of CSI reporting based on the scenario. By introducing different CSI report configurations with different parameter settings (first for non-candidate cell scenarios, second for candidate cell scenarios), the system optimizes measurement precision for each specific case. The parameters such as measurement frequencies, reporting intervals, and cell identifiers are adjusted according to the configured scenario, achieving precise measurements without requiring complex real-time adjustments.
Data Source
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AI summary
A terminal according to an aspect of the present disclosure includes: a receiving section that receives information related to at least one of a channel state information resource configuration and a channel state information report configuration for one or more candidate cells corresponding to different frequencies; and a control section that controls, based on the information related to at least one of the channel state information resource configuration and the channel state information report configuration, to report channel state information including at least one of L1-RSRP (Reference Signal Received Power) and L1-SINR (Signal to Interference plus Noise Ratio) for the one or more candidate cells.