CSI Reporting with Sub-Symbol Processing for Low-Latency Uplink
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Solution Overview
Problem
Conventional CSI reporting procedures are inadequate for supporting high-frequency wireless communication systems, particularly beyond 52.6 GHz, and fail to meet the requirements of industrial internet of things (IIoT) and ultra-reliable low-latency communication (URLLC) services due to inefficiencies in CSI processing and reporting.
Innovation Solution
Enhancements in CSI processing and reporting are introduced, including sub-symbol level availability checks, multi-PUSCH scheduling, and partial multiplexing of CSI with PUSCH to optimize CPU utilization and reduce latency, especially for higher subcarrier spacings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional CSI reporting procedures are used, then system compatibility is maintained, but processing speed and latency requirements for high-frequency communications and URLLC services cannot be met
Solution Approach 1:
The patent segments the CSI reporting process into multiple parts (Part 1 and Part 2) that can be processed and transmitted separately. Part 1 contains essential CSI parameters while Part 2 contains additional detailed information. This segmentation allows the system to process and report critical CSI data faster while maintaining the option to include detailed information when processing units are available, thus resolving the contradiction between processing speed and reporting completeness.
Solution Approach 2:
The patent implements partial CSI reporting where only essential CSI parameters are processed and transmitted when processing units are limited or time is critical. When additional processing units become available, the remaining CSI parameters are processed and transmitted in a subsequent report. This partial action approach ensures that critical CSI information is always available timely while maintaining the option to provide complete information when resources permit.
2Productivity
If more CSI processing units are allocated, then CSI processing capability is improved, but device complexity and resource consumption increase
Solution Approach 1:
The patent implements dynamic CSI processing where the number of processing units allocated to CSI tasks is adjusted based on real-time availability and urgency. The system checks processing unit availability dynamically and adapts the processing strategy accordingly - using more units when available for complete processing, or fewer units when resources are constrained. This dynamic approach optimizes processing capability without requiring permanent over-provisioning of processing units.
Solution Approach 2:
The patent changes the processing parameters based on available resources and service requirements. Different processing modes are selected depending on the number of available processing units - full processing mode when units are abundant, partial processing mode when units are limited. This parameter adaptation allows the system to maintain high productivity when resources permit while reducing complexity when resources are constrained.
3Measurement precision
If sub-symbol level processing is implemented, then processing precision and resource utilization are improved, but system complexity increases
Solution Approach 1:
The patent performs preliminary checks of processing unit availability at sub-symbol levels before committing to CSI processing tasks. By checking availability in advance at fine-grained time intervals, the system can make informed decisions about whether to proceed with processing, thereby improving resource utilization precision without requiring complex real-time arbitration mechanisms during the actual processing.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for channel state information processing and reporting. One method (700) includes determining (705), at a user equipment (“UE”), an availability of channel state information (“CSI”) processing units on a sub-symbol level where a duration of the sub-symbol being less than a symbol duration that corresponds to a subcarrier spacing of an uplink (“UL”) channel for transmission of at least one corresponding CSI report. The method (700) includes processing (710) the at least one corresponding CSI report on the determined available CSI processing units in response to a number of CSI processing units becoming available at the sub-symbol level being equal to or greater than a number of CSI processing units needed for processing the at least one corresponding CSI report.