CSI-RS Subset Reporting for Dynamic Antenna Array Adaptation
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Solution Overview
Problem
Conventional approaches for wireless communications networks, particularly in 5G, are not optimal for dynamically adapting antenna array elements, which affects user data rates, link reliability, and network capacity.
Innovation Solution
Implementing methods and apparatuses for Channel State Information (CSI) reporting that enable dynamic adaptation of antenna elements by configuring CSI reference signals (CSI-RS) with multiple ports and spatial domain resources, allowing user devices to perform measurements and report back to network nodes, facilitating dynamic adaptation of antenna arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional approaches for wireless communications networks are used, then system simplicity is maintained, but dynamic adaptation of antenna array elements is not optimal, affecting user data rates, link reliability, and network capacity
Solution Approach 1:
The patent segments the antenna array into multiple subsets, where each subset can be independently configured and adapted. The CSI reporting configuration is divided into multiple parts, including CSI report configurations and spatial domain resource configurations, allowing granular control over different antenna subsets. This segmentation enables dynamic adaptation of specific antenna elements without reconfiguring the entire array, thus improving adaptability while managing complexity.
Solution Approach 2:
The patent implements dynamic configuration of CSI reporting parameters through MAC CE signaling, allowing the network to adaptively adjust antenna subset configurations based on real-time channel conditions. The spatial domain resource configurations can be dynamically updated without requiring full RRC reconfiguration, enabling the system to respond to changing wireless environments and optimize antenna element adaptation continuously.
2Measurement precision
If multiple CSI-RS resources with multiple ports are configured for measurement, then measurement precision and channel state information accuracy are improved, but device complexity and processing requirements increase
Solution Approach 1:
The patent divides the CSI measurement process into multiple segmented configurations, where different CSI report configurations correspond to different antenna subsets. Each configuration can be independently measured and reported, allowing the UE to process measurements for specific subsets rather than handling all antenna elements simultaneously. This segmentation reduces the computational burden while maintaining measurement precision through targeted subset measurements.
Solution Approach 2:
The patent enables the network to configure the UE to measure and report CSI for only certain antenna subsets rather than requiring measurements for all antenna elements. This partial action approach allows the system to achieve sufficient measurement precision for the required service quality while significantly reducing the complexity and processing requirements compared to full-array measurements.
3Use of energy by moving object
If dynamic adaptation of antenna elements is implemented, then energy efficiency and network performance are improved, but control signaling overhead and configuration complexity increase
Solution Approach 1:
The patent extracts the dynamic adaptation control from the full RRC configuration layer and implements it through MAC CE signaling. This extraction allows the network to dynamically adjust antenna subset configurations with reduced signaling overhead compared to full RRC reconfiguration. The MAC CE-based spatial domain resource configurations can be updated efficiently without requiring extensive control signaling, thus improving energy efficiency while minimizing information loss.
Solution Approach 2:
The patent performs preliminary configuration of CSI reporting parameters and spatial domain resources through RRC signaling before dynamic adaptation is needed. This preliminary action establishes the framework for subsequent MAC CE-based updates, reducing the amount of control signaling required during dynamic operation. By pre-configuring the measurement and reporting structures, the system minimizes ongoing signaling overhead while maintaining the capability for rapid antenna element adaptation.
Data Source
AI summary
An embodiment of aspect 1 provides an user device, UE, for a wireless communication system, wherein the UE or a its transceiver is configured toreceive from a network node, e.g., gNB, at leasta channel state information, CSI, report configuration via a higher layer, e.g., radio resource control, RRC, layer,a configuration or indication via a PHY-layer, e.g., physical downlink control channel, PDCCH, signalling, and/or a higher layer signalling,perform measurement(s) on said at least one CSI-RS resource,compute one or more parameters related to a channel state information, CSI, and/or DL transmission rate and/or reliability associated with at least one of the P subsets of a CSI-RS resource, andtransmit a report to the network node via the PHY-layer or a higher layer.