CSI Transmission Prioritization Under Uplink Resource Limits
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Solution Overview
Problem
The existing communication standards, particularly in NR, face challenges with high overhead in channel state information (CSI) transmission due to the need to report CSI for multiple beams and subbands, which exceeds the available uplink resources, necessitating a solution for efficient CSI omission and compression.
Innovation Solution
The method involves determining a payload of CSI for transmission layers, discarding specific portions if the payload exceeds available resources, and transmitting the remaining CSI, along with using subband indications and frequency domain basis selection to optimize CSI transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If channel state information is reported for multiple beams and subbands to improve channel state estimation accuracy, then measurement precision is improved, but the overhead for CSI transmission increases
Solution Approach 1:
The CSI report is segmented into multiple parts (first part and second part) with different priorities. The first part contains essential CSI information that is always transmitted, while the second part contains additional beam and subband CSI information that is conditionally transmitted based on available uplink resources. This segmentation allows the system to maintain accurate channel state estimation while adapting the transmission overhead to resource availability.
Solution Approach 2:
The patent dynamically changes the transmission parameters of CSI based on the available uplink resource capacity. When resources are sufficient, more detailed CSI information including multiple beams and subbands is transmitted. When resources are limited, the system reduces the CSI payload by transmitting only the most critical information in the first part, thus adapting the quantity of transmitted data to match available resources while preserving estimation accuracy.
2Productivity
If detailed channel state information including multiple beams and subbands is transmitted to improve communication performance, then productivity is improved, but the available uplink resources are exceeded
Solution Approach 1:
The patent implements a dynamic CSI transmission mechanism where the amount and detail of CSI information transmitted adapts to the current uplink resource conditions. The system dynamically adjusts which parts of the CSI report are transmitted based on resource availability, allowing communication performance to be optimized when resources permit while ensuring essential feedback is always provided when resources are constrained.
Solution Approach 2:
The patent extracts and separates the most critical CSI information into a first part that is always transmitted, while placing less critical but still valuable beam and subband information into a second part that is transmitted only when resources allow. This extraction approach ensures that essential communication performance requirements are met while avoiding excessive resource consumption.
3Productivity
If channel state information payload is reduced to fit available uplink resources, then loss of information increases, but resource efficiency is improved
Solution Approach 1:
The patent applies different quality levels to different parts of the CSI information. The first part contains high-priority, essential CSI information with complete quality assurance that is always transmitted. The second part contains additional beam and subband information with variable quality that is transmitted selectively. This local quality differentiation ensures that resource efficiency is improved by reducing overall payload while minimizing information loss by preserving the most critical data with highest priority.
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer readable media for Channel State Information (CSI) transmission. In example embodiments, a method for communication includes determining a payload of channel state information for at least one transmission layer, the at least one transmission layer used for communication between a terminal device and a network device; in response to a determination that the payload exceeds a capacity of available uplink resources, discarding a portion of the channel state information, the discarded portion at least comprising an indication specific to one of the at least one transmission layer; and transmitting, to the network device, remaining portion of the channel state information.