CSI and SRS Update Upon TCI Activation in 5G Networks
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Solution Overview
Problem
Current 5G networks face inefficiencies in updating Channel State Information (CSI) and Sounding Reference Signal (SRS) configurations upon Transmission Configuration Indicator (TCI) activation, leading to increased overhead and latency due to separate and frequent reconfigurations.
Innovation Solution
Implement methods for Radio Resource Control (RRC) configuration to update CSI measurement and reporting, and SRS configurations based on TCI activation/deactivation, allowing for timely and efficient updates without reconfiguration overhead, by determining CSI resource sets and using activated TCI states for CSI and SRS measurements and reports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If CSI reporting and SRS configuration are separately configured from TCI state activation, then flexibility in configuration is maintained, but reconfiguration overhead and latency increase
Solution Approach 1:
The patent combines TCI state activation with CSI reporting and SRS configuration by establishing implicit associations. When TCI states are activated via MAC CE, the associated CSI-RS resources and SRS resources are automatically updated without requiring separate reconfiguration messages, thus reducing overhead and latency while maintaining configuration flexibility.
Solution Approach 2:
The patent performs preliminary configuration where CSI-RS resources and SRS resources are pre-associated with TCI states during RRC configuration. This preliminary setup enables automatic resource updates when TCI states are activated, eliminating the need for real-time reconfiguration and reducing latency.
2Measurement precision
If frequent reconfiguration is performed to enable CSI reporting based on activated TCI states, then accuracy of channel state information is improved, but system overhead increases
Solution Approach 1:
The patent merges TCI state activation with CSI-RS resource activation by establishing that activated TCI states automatically trigger the activation of associated CSI-RS resources. This eliminates the need for separate reconfiguration messages, maintaining measurement precision while reducing system overhead.
Solution Approach 2:
The system performs self-service by automatically updating CSI-RS resources and SRS resources when TCI states are activated. The UE autonomously identifies and activates the associated resources based on pre-configured associations, eliminating the need for network-initiated reconfiguration procedures and reducing overhead.
3Adaptability or versatility
If separate reconfiguration procedures are used for CSI and SRS, then configuration flexibility is maintained, but processing time increases
Solution Approach 1:
The patent merges the configuration updates for CSI and SRS into a single operation triggered by TCI state activation. When TCI states are activated via MAC CE, both CSI-RS resources and SRS resources are updated simultaneously through implicit associations, improving update efficiency while preserving configuration flexibility.
Solution Approach 2:
The patent establishes preliminary associations between TCI states, CSI-RS resources, and SRS resources during RRC configuration. This pre-establishment enables simultaneous activation of all related resources when TCI states are updated, eliminating sequential processing delays and improving overall efficiency.
Data Source
AI summary
Methods, apparatus, and systems are described for improved channel state information (CSI) and sounding reference signal (SRS) update upon transmission configuration indicator (TCI) activation in 5G networks.