Antenna Panel Adaptation Using CSI-RS Grouping for Cell Load
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Solution Overview
Problem
Massive-MIMO systems increase power consumption at network nodes due to the higher number of antennas, leading to increased costs and limited opportunities for expanding network coverage.
Innovation Solution
A method for dynamically adjusting the number of active antenna panels based on cell load, by forming new CSI-RS resource groups that aggregate or subset existing CSI-RS resources, allowing for more granular control over antenna panel activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If massive-MIMO systems increase the number of antennas at network nodes, then network throughput and efficiency are improved, but power consumption increases
Solution Approach 1:
The antenna system is divided into multiple antenna panels, each with its own power amplifier and antenna subsystem. This segmentation allows the network node to independently control and deactivate specific antenna panels based on cell load conditions, thereby reducing power consumption while maintaining the capability for high throughput when needed.
Solution Approach 2:
The system implements dynamic adaptation of antenna panels by configuring new CSI-RS resource groups that include resources from existing groups. The network node can dynamically activate or deactivate antenna panels based on real-time cell load conditions, enabling the system to adapt its power consumption to actual network demands rather than operating at fixed high power levels.
2Productivity
If the number of antenna panels is increased, then network efficiency is improved, but operational costs increase
Solution Approach 1:
The system changes operational parameters by dynamically adjusting the configuration of CSI-RS resource groups and the activation state of antenna panels based on cell load. This allows the network to maintain high efficiency when load demands it while reducing operational costs during low-load periods through selective deactivation of antenna panels.
3Use of energy by moving object
If antenna panels are dynamically deactivated based on cell load, then power savings are improved, but control granularity is limited
Solution Approach 1:
By segmenting the antenna system into multiple independently controllable panels and implementing dynamic configuration of CSI-RS resource groups, the system achieves fine-grained control over which antenna panels are active. This segmentation enables precise power management where individual panels can be activated or deactivated based on specific cell load conditions, improving both power savings and control granularity simultaneously.
Data Source
AI summary
A method for wireless communication by a user equipment (UE) includes receiving a resource configuration indicating a new channel state information-reference signal (CSI-RS) resource group that includes CSI-RS resources from one or more existing CSI-RS resource groups in a CSI-RS resource set associated with a CSI measurement report configuration. The new CSI-RS resource group may be associated with a new group of CSI-RS ports that includes CSI-RS ports associated with the one or more CSI-RS resource groups. The method also includes receiving one or more CSI-RSs associated with the CSI-RS resources within the new CSI-RS resource group, transmitting a CSI measurement report based on receiving the one or more CSI-RSs; and receiving, from the network node based on transmitting the CSI measurement report, a downlink transmission via one or more antenna panels, a quantity of the one or more antenna panels being based on a cell load indicated in the CSI measurement report.