CSI Reporting for Fast Spatial Network State Switching
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Solution Overview
Problem
Existing wireless communication systems lack efficient mechanisms for fast and low-overhead adaptation of network operation states in the spatial domain, limiting energy savings and service improvements due to slow and signaling-intensive state transitions.
Innovation Solution
Implementing CSI reporting for spatial domain network adaptation by indicating a subset of active antenna ports, panels, or TRPs through DCI format 2_8, allowing UEs to provide CSI reports that facilitate rapid network state transitions with reduced signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional signaling mechanisms are used for network state adaptation, then network operation states can be changed, but the adaptation speed is slow and signaling overhead is high
Solution Approach 1:
The patent changes the parameter of signaling format by introducing a compact DCI format 2_8 that encodes spatial domain network operation state information more efficiently. This format uses optimized bit fields to represent antenna port subsets, enabling faster state transitions with reduced signaling overhead compared to traditional RRC signaling mechanisms.
Solution Approach 2:
The patent extracts only the essential spatial domain adaptation information needed for network state transitions and places it in a dedicated compact DCI format 2_8. By separating this critical information from general-purpose signaling, the system achieves faster adaptation speed while minimizing signaling overhead.
2Reliability
If more antenna ports are activated to improve service quality, then service quality improves, but energy consumption increases
Solution Approach 1:
The patent implements dynamic adaptation of antenna port configurations through network operation states. The base station can quickly switch between different antenna port subsets (e.g., from all 64 ports to a subset of 32 ports) based on current traffic conditions, enabling energy savings during low-traffic periods while maintaining service quality during high-traffic periods.
Solution Approach 2:
The patent changes the operational parameters of antenna ports by configuring different subsets of active antenna ports for different network operation states. This allows the system to adjust the number of active antenna ports dynamically, optimizing the trade-off between service quality and energy consumption.
3Measurement precision
If comprehensive CSI reporting is performed for all antenna ports, then measurement precision is high, but signaling overhead increases
Solution Approach 1:
The patent extracts CSI reporting requirements to match the activated antenna port subsets. Instead of requiring comprehensive CSI reports for all possible antenna ports, the system only requires CSI reports for the currently active ports, reducing signaling overhead while maintaining measurement precision for the relevant ports.
Solution Approach 2:
The patent applies local quality optimization by configuring CSI reporting parameters specifically for each antenna port subset. Each network operation state has tailored CSI reporting requirements that match the spatial configuration of active antenna ports, ensuring measurement precision is optimized for the current operational context without unnecessary overhead.
Data Source
AI summary
Methods and apparatuses for network operation adaptation in a spatial domain in a wireless communication system. A method for a user equipment (UE) to report channel state information (CSI) includes receiving: first information related to reception of CSI reference signals (CSI-RSs) on a cell, second information related to determining a first number of CSI reports respectively associated with a first number of operation states on the cell, third information related to triggering a second number CSI reports respectively associated with a second number of operation states from the first number of operation states, and the CSI-RSs based on the first information. An operation state is associated with a configuration for active antenna ports, antenna panels, or transmission reception points. The method further includes determining, based on the second information and the CSI-RSs, the second number of CSI reports and transmitting a channel with the second number of CSI reports.