CSI Feedback Partitioning for High-Velocity Channel Prediction
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Solution Overview
Problem
In wireless communication systems, CSI feedback becomes outdated due to high/medium velocity of terminal devices, leading to suboptimal downlink data transmission.
Innovation Solution
Implementing methods and devices that configure and transmit CSI feedback with partitions having different omission priorities, utilizing parameters associated with first, second, and third vectors to enhance channel prediction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CSI feedback is transmitted using conventional methods, then the feedback can be sent to the network device, but the CSI feedback becomes outdated for terminal devices moving at high/medium velocity
Solution Approach 1:
The CSI feedback is segmented into multiple parts with different omission priorities. Each part contains parameters associated with different vectors (first vectors for spatial domain, second vectors for frequency domain, third vectors for time/doppler domain). This segmentation allows the network device to selectively receive and use the most critical parts of the CSI feedback even when terminal velocity causes channel conditions to change rapidly.
Solution Approach 2:
The patent introduces new parameters including time domain information and doppler domain information to characterize the channel conditions for moving terminals. By changing the parameter set to include these temporal characteristics, the CSI feedback remains valid and accurate even when the terminal device moves at high or medium velocity.
2Measurement precision
If CSI feedback includes all parameters for accurate channel representation, then the precision is improved, but the feedback size and processing complexity increase
Solution Approach 1:
The CSI feedback is divided into multiple parts with different omission priorities, where each part contains parameters associated with different vectors. This segmentation maintains comprehensive channel representation while organizing the feedback structure in a manageable way that reduces processing complexity through hierarchical handling.
Solution Approach 2:
Different parts of the CSI feedback have different omission priorities assigned to them. The network device can selectively process higher priority parts first, allowing for differentiated handling of various parameter sets based on their criticality for maintaining accurate channel representation under different terminal velocity conditions.
Data Source
AI summary
Example embodiments of the present disclosure relate to an effective mechanism for processing the CSI reports. In this solution, the terminal device receives, at a terminal device and from a network device, at least one configuration for channel state information (CSI) feedback; and transmits, based on at least one configuration, to the network device, the CSI feedback comprising a plurality of partitions with different omission priorities, the plurality of partitions comprising parameters associated with: a plurality of first vectors, a plurality of second vectors, and a plurality of third vectors. In this way, by associating the parameters with three types of vectors, the TD/DD information may be reported together with the SD information and FD information.