Terminal CPU Occupation Time Configuration for Semi-Persistent CSI
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing channel state information (CSI) processing units in terminals, particularly in 5G communication systems, which are essential for high data rate and IoT applications, due to complexities in resource allocation and CSI reporting mechanisms.
Innovation Solution
A method and apparatus for configuring the occupation time of CSI processing units in terminals, involving indications for activating or deactivating semi-persistent CSI reports through higher layer signaling or downlink control information, and determining CPU occupation times based on reception and decoding times of CSI-reference signals and control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If semi-persistent CSI reports are activated through higher layer signaling or DCI, then CSI reporting accuracy is improved, but CPU occupation time increases
Solution Approach 1:
The patent implements dynamic CPU occupation time configuration by allowing the network to indicate different occupation time values through higher layer signaling or DCI based on current channel conditions and terminal capabilities. This enables the system to adaptively adjust the balance between CSI reporting accuracy and CPU resource consumption, resolving the contradiction by making the occupation time flexible rather than fixed.
Solution Approach 2:
The patent changes the parameter of CPU occupation time based on different operational scenarios. By configuring different occupation time values (e.g., first occupation time for normal operation, second occupation time for specific conditions) and selecting appropriate values through signaling, the system optimizes both measurement precision and resource efficiency, preventing excessive CPU occupation while maintaining accurate CSI reporting.
2Measurement precision
If CPU occupation time is extended for accurate CSI processing, then measurement precision is improved, but system productivity decreases
Solution Approach 1:
The patent applies partial action by configuring CPU occupation time that is sufficient for accurate CSI measurement without extending it excessively. By indicating specific occupation time values through higher layer signaling or DCI, the system provides just enough processing time for reliable CSI reporting while avoiding unnecessary extension that would reduce system throughput and productivity.
3Loss of information
If multiple CSI reports are processed simultaneously, then information completeness is improved, but device complexity increases
Solution Approach 1:
The patent segments the processing of multiple CSI reports by configuring separate CPU occupation time parameters for different report types or conditions. Through higher layer signaling or DCI, the network can indicate which occupation time to apply for specific CSI report scenarios, allowing the terminal to process multiple reports in an organized manner that reduces complexity while maintaining information completeness.
Data Source
AI summary
A method, performed by a terminal, of determining a channel state information processing unit (CPU) occupation time in a wireless communication system, according to an embodiment of the present disclosure, includes: receiving, from a base station, information indicating activation of a semi-persistent channel state information (CSI) report; receiving, from the base station, at least one CSI-reference signal (RS) for the semi-persistent CSI report; and determining a CPU occupation time for the semi-persistent CSI report based on at least one of a reception time point of the information indicating the activation of the semi-persistent CSI report or a reception time point of the at least one CSI-RS. The information indicating the activation of the semi-persistent CSI report is transmitted by being included in downlink control information (DCI) or a media access control control element (MAC CE).