Antenna Port Group Selection for Energy Reduction
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Solution Overview
Problem
Large antenna arrays in wireless communication systems consume significant energy due to the need for multiple RF chains, leading to increased complexity and energy expenditure.
Innovation Solution
The system dynamically selects a subset of active antenna port groups based on channel and interference conditions, reducing energy consumption while maintaining performance gains from large arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large antenna arrays are used to maintain performance gains, then communication performance is improved, but energy consumption increases
Solution Approach 1:
The antenna array is divided into multiple port groups, allowing selective activation of only the necessary subsets based on channel conditions. This segmentation enables the system to maintain performance by activating only relevant port groups while keeping others inactive to save energy.
Solution Approach 2:
The system dynamically selects and activates different subsets of port groups based on varying channel and interference conditions. This dynamic adaptation allows the system to optimize the balance between performance and energy consumption in real-time, activating only the necessary port groups when needed.
2Adaptability or versatility
If multiple RF chains are used to support large antenna arrays, then system capability is improved, but device complexity increases
Solution Approach 1:
The antenna array and RF chains are organized into port groups, allowing the system to support large arrays by dividing them into manageable segments. Only the necessary port groups are activated at any given time, reducing the effective complexity while maintaining the capability to support large arrays when needed.
Solution Approach 2:
The port groups are designed to be universally applicable, where each group can serve multiple functions and be activated based on different channel conditions. This multi-functionality allows the system to maintain high adaptability with reduced complexity by reusing the same port group structures in different configurations.
3Measurement precision
If all port groups are monitored and reported, then measurement accuracy is improved, but CSI feedback overhead increases
Solution Approach 1:
Instead of monitoring and reporting on all port groups, the system extracts and reports only the channel state information for the selected subset of active port groups. This extraction approach maintains measurement accuracy for the relevant ports while significantly reducing the feedback overhead by excluding information from inactive port groups.
Solution Approach 2:
The system applies different measurement and reporting quality levels to different port groups based on their activation status. Active port groups receive full measurement and reporting attention, while inactive groups are excluded from detailed reporting, optimizing the balance between accuracy and overhead.
Data Source
AI summary
Various aspects of the present disclosure relate to receiving, from a network node, a channel state information (CSI) reporting configuration; receiving a set of CSI reference signal (CSI-RS), wherein the set of CSI-RS is associated with a plurality of port groups; selecting a subset of port groups from the plurality of port groups, based on the received set of CSI-RS and the CSI reporting configuration; generating a CSI report comprising an indication of the selected subset of port groups and a channel measurement corresponding to the selected subset of port groups; and transmitting the CSI report to the network node.