CSI Reporting via Antenna Port Segmentation for 5G Energy Savings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently adapting spatial patterns for network energy savings, leading to increased energy consumption and signaling overhead in CSI reporting mechanisms.
Innovation Solution
The proposed solution involves a method and system for User Equipment (UE) and Base Station (BS) to efficiently report Channel State Information (CSI) by configuring CSI-RS resource sets, using port indicators and sub-configuration IDs to reduce the number of active antenna ports and adapt spatial patterns dynamically, thereby optimizing energy usage and reducing reporting overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional CSI reporting mechanisms are used, then comprehensive channel state information can be obtained, but energy consumption and signaling overhead increase
Solution Approach 1:
The patent segments the CSI reporting process by dividing antenna ports into multiple subsets, each associated with a specific port indicator. Instead of reporting CSI for all antenna ports simultaneously, the system reports CSI for selected subsets based on the indicated port indicators, thereby reducing energy consumption while maintaining necessary channel state information for network optimization
Solution Approach 2:
The patent applies partial action by having the UE report CSI only for a subset of antenna ports rather than all ports. The port indicators specify which antenna port subsets should be measured and reported, allowing the system to obtain sufficient CSI for network optimization without the excessive action of processing and reporting all possible antenna port CSI simultaneously
2Device complexity
If all antenna ports are configured for CSI measurement, then complete spatial pattern information is obtained, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent segments the antenna ports into multiple subsets, with each subset associated with a port indicator. The CSI-RS resource set configuration includes multiple CSI-RS resources, each corresponding to a specific subset of antenna ports. This segmentation allows the system to obtain complete spatial pattern information by measuring multiple subsets separately, reducing signaling overhead compared to configuring all ports simultaneously
Solution Approach 2:
The patent applies preliminary action by pre-configuring the UE with multiple port indicators and their corresponding antenna port subsets through the CSI-RS resource set configuration. This preliminary configuration allows the UE to understand which antenna port subsets should be measured for each CSI-RS resource, enabling efficient CSI reporting without requiring complex real-time signaling during measurement
Data Source
AI summary
A method performed by a User Equipment (UE) for reporting Channel State Information (CSI) is provided. The method receives, from a Base Station (BS), a CSI-Reference Signal (CSI-RS) resource set configuration. The method receives, from the BS, a CSI report configuration including a first resource configuration identifier (ID) corresponding to the CSI-RS resource set configuration, a report content configuration, and multiple port indicators, each of the port indicators corresponding to a CSI measurement result based on a subset of antenna ports. The method receives, from the BS, Downlink Control Information (DCI) for triggering an aperiodic CSI report associated with the CSI report configuration. In response to receiving the DCI, the method transmits, to the BS, a CSI report associated with the CSI report configuration.