Adaptive CSI Processing Time Configuration for WTRU Complexity
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Solution Overview
Problem
In next-generation wireless communication systems, the reduced timing for channel state information (CSI) reporting in new radio (NR) systems increases the implementation complexity for wireless transmit/receive units (WTRUs, as they have less time for CSI measurement and processing, leading to undefined signaling between the WTRU and the network.
Innovation Solution
The system adaptively configures and reports CSI by determining multiple types of CSI processing times based on system parameters, WTRU capability, and numerology, allowing for dynamic indication of transmission and reception points, and supports multi-level CSI reporting through multi-stage downlink control information to manage CSI reporting timing and types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CSI reporting timing is reduced in NR systems, then system efficiency and responsiveness are improved, but WTRU implementation complexity and cost increase due to insufficient processing time
Solution Approach 1:
The patent applies dynamics by making the CSI processing time configurable and adaptable based on WTRU capability. The base station can dynamically adjust the processing time granted to different WTRUs according to their specific capabilities, allowing the system to optimize between reporting speed and processing feasibility for each device.
Solution Approach 2:
The patent changes the parameter of CSI processing time from a fixed value to a configurable parameter that can be adjusted based on WTRU capability. By introducing capability indicators that specify supported processing times, the system can adapt the timing parameters to match device capabilities, resolving the contradiction between short reporting times and sufficient processing time.
2Device complexity
If CSI processing time is extended to allow adequate measurement and calculation, then WTRU implementation becomes simpler, but system responsiveness and reporting frequency are reduced
Solution Approach 1:
The patent segments the CSI reporting process by dividing it into different capability levels. WTRUs are categorized based on their processing capabilities, and each segment is granted appropriate processing time. This segmentation allows the system to handle multiple WTRUs with different requirements simultaneously, balancing individual processing needs with overall system responsiveness.
Solution Approach 2:
The patent creates a universal framework that supports multiple CSI processing time configurations within the same system. The base station can universally apply different processing time allocations to different WTRUs based on their capabilities, allowing the system to function efficiently whether WTRUs have high or low processing capabilities.
3Adaptability or versatility
If multiple CSI processing time types are configured based on WTRU capability, then system adaptability improves, but signaling complexity between WTRU and network increases
Solution Approach 1:
The patent applies partial action by implementing capability indication only when necessary for advanced processing time configurations. For basic configurations or when WTRUs have standard capabilities, simplified signaling is used. This partial implementation approach reduces overall signaling overhead while still providing adaptability for WTRUs that require extended or reduced processing times.
Data Source
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AI summary
Methods, apparatuses and systems are provided for transmission of a CSI report. A WTRU may receive an aperiodic CSI reporting request on a PDCCH. The WTRU may determine a time gap between a last symbol of the PDCCH of which the aperiodic CSI reporting request is received and a first uplink symbol of a designated uplink channel for transmission of a corresponding aperiodic CSI report. The determination of the time gap may include consideration of a timing advance value. A determination may be made as to whether a time threshold is shorter than the determined time gap. If the determined time gap is not shorter than the time threshold, the WTRU may transmit the CSI report. If the determined time gap is shorter than the threshold, the WTRU may not transmit the CSI report.