Partial Spatial Sounding for UE Channel Reconstruction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional sounding techniques in 5G NR require significant time and frequency resources to determine channel quality between devices, especially as the number of antennas increases, leading to inefficient utilization of resources.
Innovation Solution
A UE organizes its antennas into groups based on correlation characteristics and performs partial spatial sounding using a subset of antennas, allowing a partner device to measure reference signals and reconstruct channels efficiently without requiring all antennas to transmit during the sounding procedure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all antennas transmit reference signals during sounding procedures, then channel reconstruction accuracy is improved, but time and frequency resource consumption increases
Solution Approach 1:
The patent segments the antenna array into multiple groups, where only representative antennas from each group transmit reference signals. This segmentation allows channel reconstruction for all antennas while reducing the number of transmitting antennas, thereby decreasing time and frequency resource consumption while maintaining reconstruction accuracy through correlated channel estimation.
Solution Approach 2:
The patent uses channel correlation properties to copy channel information from representative antennas to non-representative antennas. By measuring reference signals from a subset of antennas and utilizing correlation data, the system reconstructs channel information for all antennas without requiring each antenna to transmit its own reference signal, thus reducing resource overhead.
2Loss of information
If all antennas transmit reference signals during sounding procedures, then complete channel information is obtained, but device complexity and resource utilization increase
Solution Approach 1:
The patent divides the antenna set into groups with representative antennas that transmit reference signals. This segmentation reduces the complexity of coordinating all antennas for sounding while ensuring complete channel information is obtained through correlation-based reconstruction for the entire antenna array.
Solution Approach 2:
The patent applies partial action by having only a subset of antennas (representative antennas) perform the reference signal transmission function. This partial action is sufficient to obtain complete channel information for all antennas when combined with correlation processing, thereby reducing device complexity and resource utilization without sacrificing information completeness.
3Measurement precision
If more time and frequency resources are allocated to sounding procedures, then channel reconstruction quality improves, but communication efficiency decreases
Solution Approach 1:
By segmenting antennas into groups with representative transmitters, the patent reduces the time and frequency resources required for sounding procedures. This allows channel reconstruction quality to be maintained or improved while freeing up resources for actual data communication, thereby enhancing overall communication efficiency.
Solution Approach 2:
The patent changes the parameter of antenna participation from all antennas to a subset of representative antennas. This parameter change reduces the resource overhead for sounding procedures, allowing the system to achieve comparable or better channel reconstruction quality with fewer resources, thus improving communication efficiency by allocating more resources to data transmission.
Data Source
AI summary
A user equipment may be configured to assist channel reconstruction using partial spatial sounding. In some aspects, the user equipment (UE) may transmit, to another device, correlation capability information indicating a sounding reference signal (SRS) grouping capability of the UE, and receive, from the other device, reference signal (RS) configuration information for configuring a sounding procedure to be performed by the UE. Further, the UE may transmit a reference signal to the other device over a reference antenna port of the UE to allow the other device to determine channel information for another antenna port of the UE, and receive data from the other device based on the channel information.