CSI Configuration Switching for Fast RAN Energy Saving
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Solution Overview
Problem
Current cellular networks face high latency and signaling overhead due to slow RRC-based configuration of antenna elements and transmission power for user equipment, which is inefficient for multiple UEs.
Innovation Solution
Implementing L1/L2 signaling with reduced bit counts to configure groups of UEs with pre-defined sets of antenna and power settings, using activation timers to manage configuration application, and enabling multiple CSI feedback reports for optimal network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RRC signaling is used to configure antenna elements and transmission power for each UE, then configuration reliability is improved, but configuration latency increases and signaling overhead increases
Solution Approach 1:
The patent pre-configures multiple antenna and power settings in advance, allowing the network to quickly switch between predefined configurations using faster L1/L2 signaling instead of performing slow RRC reconfiguration for each change. This preliminary preparation resolves the latency issue while maintaining reliability through the structured configuration approach.
Solution Approach 2:
The patent introduces dynamic switching between multiple predefined antenna and power configurations using L1/L2 signaling, enabling the system to adapt configuration parameters rapidly based on current network conditions. This dynamic approach replaces the static, slow RRC configuration process with fast, flexible switching.
2Measurement precision
If per-UE configuration is performed using RRC signaling, then configuration accuracy is improved, but system overhead increases
Solution Approach 1:
The patent merges multiple per-UE configuration operations into a unified approach where a single L1/L2 signaling message can simultaneously configure antenna and power settings for multiple UEs. This consolidation reduces the total signaling overhead while maintaining configuration accuracy through the structured and controlled nature of the unified configuration process.
Solution Approach 2:
The patent creates a universal configuration mechanism that can serve multiple UEs simultaneously through L1/L2 signaling, rather than requiring separate RRC configuration messages for each UE. This multi-functional approach reduces system overhead while preserving the precision needed for accurate configuration through the standardized configuration parameters.
3Reliability
If RRC reconfiguration is performed for multiple UEs, then configuration completeness is improved, but system overhead increases
Solution Approach 1:
The patent combines multiple UE configuration operations into a single L1/L2 signaling event that can simultaneously affect multiple UEs. This merging approach maintains configuration completeness by ensuring all necessary parameters are set for each UE while dramatically reducing the cumulative system overhead compared to individual RRC reconfiguration messages for each UE.
Solution Approach 2:
The patent uses standardized, reusable configuration templates that can be copied and applied to multiple UEs. These predefined configurations ensure completeness for each UE while reducing overhead through template reuse rather than creating unique configuration messages for each user equipment.
Data Source
AI summary
The present disclosure describes mechanisms to configure user equipment (UEs) with a set of channel state information (CSI) and/or measurement configurations, and mechanisms to indicate codepoints that activate or trigger selected ones of the configured CSI/measurement configures that individual UEs are to use to report CSI and/or other measurements. The set of configurations can indicate how individual UEs are to compute CSI and/or measurement feedback reports. The set of configurations can include information about which subset of antenna ports from a set of antenna port configurations, and potential transmission power offsets between CSI reference signal (CSI-RS) and physical downlink shared channel (PDSCH). The signaling mechanisms can include radio resource control (RRC) for the CSI/measurement configurations and/or downlink control information (DCI) signaling for activation/triggering of the selected CSI/measurement configurations. The activation/triggering signaling can include a limited number of bits to indicate the codepoints.