CSI Reporting on Uplink Shared Channel with Multiple Bandwidth Parts
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Solution Overview
Problem
Current wireless communication systems face ambiguity in channel state information (CSI) reporting on physical uplink shared channels with multiple uplink bandwidth parts due to differences in the number of entries in report slot offset lists and time domain resource allocation lists, leading to inefficiencies and potential retransmissions.
Innovation Solution
The implementation of separate report slot offset lists for each uplink bandwidth part or a single list with entries matching the largest time domain resource allocation list, allowing unambiguous scheduling offsets and improving CSI reporting reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single report slot offset list is used for all uplink bandwidth parts, then device complexity is reduced, but ambiguity arises when the number of entries differs from time domain resource allocation lists
Solution Approach 1:
The patent segments the report slot offset list into separate lists for each uplink bandwidth part. Each bandwidth part has its own dedicated report slot offset list, eliminating ambiguity about which list to use. This segmentation resolves the contradiction by prioritizing reliability over configuration simplicity.
Solution Approach 2:
The patent applies local quality by making the report slot offset list configuration bandwidth-part-specific. Each bandwidth part can have customized offset values tailored to its specific requirements, rather than using a generic global list. This ensures optimal performance for each bandwidth part while eliminating selection ambiguity.
2Reliability
If separate report slot offset lists are configured for each uplink bandwidth part, then CSI reporting reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements a unified reporting framework where the same report slot offset list configuration mechanism applies to all uplink bandwidth parts. The base station can selectively configure one or more lists depending on the number of bandwidth parts, providing universal applicability while adapting to specific scenarios.
Solution Approach 2:
The patent introduces dynamic configuration where the base station decides whether to configure separate report slot offset lists for each bandwidth part or a single shared list based on system conditions. This dynamic approach allows the system to adapt between reliability-optimized and complexity-optimized modes.
3Adaptability or versatility
If the report slot offset list has entries matching the largest time domain resource allocation list, then compatibility across all bandwidth parts is improved, but precision for individual bandwidth parts may be reduced
Solution Approach 1:
By segmenting the report slot offset list into bandwidth-part-specific lists, each list can be precisely sized to match its corresponding bandwidth part's time domain resource allocation list. This eliminates the need to use a oversized universal list and restores full precision for each bandwidth part.
Solution Approach 2:
Each bandwidth part receives a report slot offset list with the exact number of entries needed for its specific time domain resource allocation requirements. This local customization ensures optimal precision for each bandwidth part rather than using a one-size-fits-all approach.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. The method may include receiving a configuration of a set of multiple report slot offset parameters, where a subset of the set of multiple report slot offset parameters is associated with a bandwidth part of a set of multiple bandwidth parts configured for the UE, receiving, during a first slot, a message triggering a channel state information report on a physical uplink shared channel of the bandwidth part, selecting a second slot for transmitting the channel state information report based on the first slot and the subset of the set of multiple report slot offset parameters associated with the bandwidth part, and transmitting, during the second slot, the channel state information report.