CSI Report Partitioning for Uplink Control Information
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Solution Overview
Problem
In advanced wireless communication systems, the increase in the number of antennas and channel paths leads to a significant increase in channel state information (CSI) feedback, resulting in overhead that reduces the efficiency of wireless communication by decreasing data rates.
Innovation Solution
A method and apparatus for multiplexing higher-resolution CSI in wireless communication systems, where user equipment (UE) calculates and partitions CSI reports into parts, determining available and required information bits for uplink control information (UCI) transmission, and transmits only a portion of the CSI reports when the required bits exceed the available bits, optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If higher-resolution CSI feedback is implemented with increased numbers of antennas and channel paths, then channel estimation accuracy is improved, but feedback overhead increases which reduces wireless communication efficiency and decreases data rate
Solution Approach 1:
The patent segments the CSI feedback into multiple parts (first CSI feedback and second CSI feedback) that can be transmitted in different time slots. The first CSI feedback includes narrower beam information while the second CSI feedback includes wider beam information, allowing the system to obtain high-resolution channel state information through multiple smaller feedback packets rather than one large packet, thereby reducing instantaneous feedback overhead and maintaining communication efficiency
2Measurement precision
If higher-resolution CSI feedback is implemented with increased numbers of antennas and channel paths, then channel estimation accuracy is improved, but feedback overhead increases which decreases data rate
Solution Approach 1:
The patent divides the CSI feedback into multiple parts transmitted at different times. The first CSI feedback contains critical narrower beam information transmitted in a first time slot, while the second CSI feedback contains wider beam information transmitted in a second time slot. This temporal segmentation allows the system to maintain high data rates by avoiding large feedback packets in a single time slot, while still achieving high-resolution channel estimation through the combined information from both feedback parts
3Productivity
If CSI feedback is partitioned into multiple parts transmitted at different times, then feedback overhead in each time slot is reduced, but the complexity of calculating and partitioning CSI reports increases
Solution Approach 1:
The patent implements segmentation by dividing CSI feedback into multiple parts based on beam width characteristics. The first CSI feedback corresponds to narrower beams while the second CSI feedback corresponds to wider beams. This segmentation is performed at the UE based on configured parameters, and the base station receives and processes these partitioned feedbacks in different time slots, reducing the complexity burden on any single processing instance while maintaining overall system efficiency
Data Source
AI summary
A user equipment (UE) for channel state information (CSI) comprises receiving configuration information for K CSI reports, wherein the configuration information includes resource allocation information for an uplink control information (UCI) transmission that includes UCI comprising N UCI parts, calculating the K CSI reports and partitioning the K CSI reports into N parts, determining an available number of information bits (B1) for the UCI transmission according to the resource allocation information, determining a required number of information bits (B2) for the UCI transmission according to the calculated K CSI reports, determining whether the B2 exceeds the B1; and transmitting, to the BS over one slot of an uplink channel, a first part of the N UCI parts including a first of the N parts of the K CSI reports when the B2 exceeds the B1, wherein K and N are positive integers.