Uplink Control Information Packing for Resource-Limited CSI Reporting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in accurately reporting channel state information (CSI) due to insufficient uplink resource allocation, leading to UCI omission that may result in critical information being dropped, especially in scenarios with rapidly changing channel conditions, causing degraded CSI estimations and communication performance.
Innovation Solution
Prioritize groups of information in UCI based on time domain basis index values and non-zero coefficients of a coefficient matrix, ensuring critical information is included in CSI reports even when uplink resources are limited.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If uplink resource allocation is insufficient to carry entire CSI report contents, then UCI omission occurs and payload size fits within allocation, but critical information is dropped and CSI estimation accuracy degrades
Solution Approach 1:
The patent segments the CSI report into multiple priority groups (first group with highest priority, second group with medium priority, third group with lowest priority). This segmentation allows the system to selectively transmit critical information while omitting less important data when uplink resources are limited, thereby preventing loss of essential CSI information while fitting the payload within allocated resources.
Solution Approach 2:
The patent applies local quality by assigning different priority levels to different groups of CSI information based on their importance. The first group contains critical information that must be preserved, while lower priority groups can be omitted. This ensures that when resource constraints exist, only the most important local portions of the CSI report are transmitted.
2Quantity of substance
If UCI packing order or omission order is defined without considering time domain bases and coefficients, then UCI fits within resource allocation, but UE and network node become desynchronized on included information
Solution Approach 1:
The patent applies preliminary action by establishing a predefined packing order and omission order that explicitly includes time domain bases and coefficients in the first priority group before UCI transmission. This pre-established hierarchy ensures that both the UE and network node agree on which information to include or omit, preventing desynchronization while ensuring critical time-domain information is preserved within resource constraints.
3Reliability
If channel conditions vary rapidly due to medium or high UE velocity, then accurate CSI reporting becomes more difficult, but MIMO transmission requires accurate CSI for signal precoding
Solution Approach 1:
The patent segments CSI information into priority groups with time domain bases and coefficients in the highest priority group. This segmentation ensures that when channel conditions change rapidly due to high UE velocity, the most critical time-domain information is preserved in the UCI transmission, maintaining reliable CSI reporting accuracy despite speed-related channel variations.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, an indication of an uplink resource associated with reporting channel state information (CSI). The UE may transmit, to the network node and using the uplink resource, uplink control information (UCI) including a CSI report that indicates precoding matrix indicator (PMI) values, based at least in part on prioritizing groups of information associated with the CSI report, at least one group, of the groups, being associated with time domain basis index values and non-zero coefficients of a coefficient matrix of a codebook associated with the CSI report. Numerous other aspects are provided.