CSI Resource Activation for Flexible Wireless Terminal Reporting
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Solution Overview
Problem
In future radio communication systems, controlling CSI measurement resources and reporting becomes challenging due to structural differences from existing LTE systems, particularly in managing CSI-RS resources and reporting methods.
Innovation Solution
The method involves activating and deactivating CSI-RS resources and reporting through various signaling mechanisms, including UE-specific DCI, group common DCI, RRC signaling, and MAC CE, to ensure proper control and efficient CSI measurement and reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing LTE control methods for CSI measurement resources and reporting are adopted, then compatibility with current systems is maintained, but they cannot be properly applied to future radio communication systems with different structures
Solution Approach 1:
The patent introduces dynamic activation and deactivation mechanisms for CSI measurement resources and reporting configurations. The base station can dynamically enable or disable specific CSI reporting modes (periodic, aperiodic, semi-persistent) and CSI measurement resources (CSI-RS, SRS) based on current network conditions and requirements, allowing the system to adapt flexibly between different operation modes rather than being fixed to a single control method
Solution Approach 2:
The patent employs parameter-based control where specific fields in DCI messages (such as activation/deactivation indicators, reporting mode indicators) are used to change the operational parameters of CSI measurement and reporting. By modifying these parameters dynamically, the system can transition between different CSI reporting configurations without requiring complete reconfiguration, thus adapting to future system requirements while building on existing LTE parameters
2Reliability
If multiple signaling mechanisms are used to activate and deactivate CSI-RS resources and reporting, then precise control is achieved, but signaling overhead increases
Solution Approach 1:
The patent combines multiple control functions into unified signaling mechanisms. For example, the same DCI message format is used to both activate CSI measurement resources and trigger reporting, or to simultaneously control multiple CSI reporting configurations. This merging reduces the number of separate signaling messages required while maintaining precise control over CSI operations
Solution Approach 2:
The patent designs universal control mechanisms that can handle multiple CSI reporting types (periodic, aperiodic, semi-persistent) and multiple CSI measurement resources using the same signaling framework. The DCI formats and RRC configuration structures are designed to be multi-functional, allowing a single signaling mechanism to control different aspects of CSI operations, thereby reducing overall signaling overhead while maintaining comprehensive control
3Measurement precision
If CSI measurement resources and reporting are continuously monitored and managed, then accurate channel state information is maintained, but latency and processing delay increase
Solution Approach 1:
The patent implements periodic CSI reporting mechanisms where CSI measurement resources are activated and reporting is triggered at specific periodic intervals rather than continuously. The base station can configure different periodicities for different CSI reporting modes, allowing the system to maintain accurate channel state information at appropriate intervals while reducing continuous monitoring overhead and latency
Solution Approach 2:
The patent employs preliminary configuration and activation mechanisms where CSI measurement resources are pre-configured through RRC signaling but only activated for measurement and reporting when needed through MAC CE or DCI triggers. This preliminary setup allows the system to have CSI resources ready but inactive, reducing continuous processing delay while maintaining the capability to quickly activate accurate CSI measurement when required
Data Source
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Figure 3A~3B
AI summary
In a case of communication adopting a constitution different from existing LTE systems, in order to properly control a CSI measurement resource and/or CSI reporting, a user terminal includes a receiving section that receives a signal in a reference signal resource for measuring channel state information, and a control section that controls, based on indication information received from a radio base station, activation or deactivation of the reference signal resource and/or channel state information reporting, and signaling on receiving of the indication information.