User Terminal CSI Reporting Control via Timer Deactivation
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Solution Overview
Problem
Future radio communication systems, such as LTE Rel. 14 and 5G, require new configurations for CSI reporting that differ from existing LTE systems, making it challenging to apply traditional CSI-reporting control methods effectively.
Innovation Solution
A user terminal equipped with a receiving section for configuration information and a control section that manages the start and deactivation of periodic CSI reporting based on commands, ensuring proper CSI reporting even when different configurations are used.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional CSI-reporting control methods are applied in future radio communication systems with new configurations, then existing LTE system compatibility is maintained, but CSI reporting control accuracy and reliability deteriorate due to configuration mismatches
Solution Approach 1:
The patent implements dynamic control of CSI reporting by introducing a timer mechanism that automatically deactivates semi-persistent CSI reporting after a predetermined period. This dynamic approach allows the system to adapt to changing communication conditions while maintaining compatibility with existing LTE configurations, resolving the contradiction between adaptability and control accuracy.
Solution Approach 2:
The patent changes the control parameters of CSI reporting by introducing timer-based deactivation mechanisms and configurable periodicity. These parameter changes enable the system to operate reliably under new future radio communication configurations while preserving compatibility with existing LTE systems through configurable options.
2Loss of information
If semi-persistent CSI reporting is continuously transmitted without deactivation, then reporting completeness is improved, but resource waste increases due to unnecessary transmissions after channel conditions change
Solution Approach 1:
The patent implements periodic CSI reporting with automatic deactivation through timer mechanisms. The reporting is transmitted periodically at configured intervals but is automatically deactivated after a predetermined time period, preventing continuous unnecessary transmissions. This resolves the contradiction by maintaining reporting completeness during the active period while avoiding resource waste through automatic termination.
Solution Approach 2:
The system incorporates feedback mechanisms where the base station can send activation and deactivation commands to control CSI reporting. This feedback loop ensures that CSI reporting is maintained when needed while being stopped when channel conditions change, balancing reporting completeness with resource efficiency.
3Measurement precision
If manual deactivation commands are required for every CSI reporting stop, then reporting precision is improved, but system complexity increases due to additional signaling overhead
Solution Approach 1:
The patent implements self-service deactivation through timer mechanisms that automatically terminate CSI reporting after a predetermined period without requiring manual intervention. The system serves itself by automatically managing the deactivation process, which maintains reporting precision during the active period while reducing control signaling complexity by eliminating the need for continuous manual commands.
Data Source
AI summary
In order to control CSI reporting properly when communication is carried out by applying different configurations than existing LTE systems, a user terminal has a receiving section that receives configuration information for channel state information reporting, and a control section that controls a start of periodic transmission of the channel state information reporting based on the configuration information in response to receipt of a command for activation of the channel state information reporting, and that controls that, when a condition is fulfilled during a period from the start to deactivation of the channel state information reporting, the channel state information reporting is no longer transmitted.