Base Station TRS CSI-RS Parameter Configuration for Non-Connected UE
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Solution Overview
Problem
Current wireless communication systems lack specific provisions for configuring physical layer parameters of Tracking Reference Signals (TRS) and Channel State Information Reference Signals (CSI-RS) for User Equipment (UE) in idle or inactive states, leading to challenges in downlink synchronization and reception efficiency.
Innovation Solution
A method where a base station sends physical layer parameter information for TRS and/or CSI-RS to UE in non-connected states, including QCL and SCS parameters, allowing UE to determine optimal reception parameters, and an apparatus for implementing this method, enabling flexible configuration and improved reception success rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical layer parameters are not configured for UE in non-connected states, then device complexity is reduced, but downlink synchronization reliability deteriorates
Solution Approach 1:
The UE autonomously determines the physical layer parameters (QCL and SCS) for receiving TRS/CSI-RS in non-connected states by itself, without requiring the base station to explicitly configure these parameters through signaling. This self-service approach maintains synchronization reliability while avoiding the complexity of parameter configuration and transmission.
Solution Approach 2:
The necessary physical layer parameters are prepared and made available in advance through system information or previous connected-state configurations, allowing the UE to perform downlink synchronization in non-connected states without real-time parameter configuration. This preliminary preparation ensures synchronization reliability while minimizing configuration complexity.
2Productivity
If physical layer parameters are configured for UE in non-connected states, then reception efficiency is improved, but information transmission overhead increases
Solution Approach 1:
The UE independently determines the physical layer parameters (QCL and SCS) needed for efficient TRS/CSI-RS reception without receiving explicit configuration signaling from the base station. This eliminates signaling overhead while maintaining reception efficiency through autonomous parameter selection based on pre-available information.
Solution Approach 2:
The same physical layer parameters (QCL and SCS) used for connected-state operations are reused for non-connected state TRS/CSI-RS reception. This universal parameter application improves reception efficiency without requiring additional dedicated configuration signaling, thereby avoiding information transmission overhead.
3Use of energy by moving object
If UE performs downlink synchronization in non-connected states without parameter configuration, then power consumption is reduced, but synchronization precision deteriorates
Solution Approach 1:
The UE autonomously determines the physical layer parameters (QCL and SCS) for TRS/CSI-RS reception in non-connected states, enabling accurate synchronization without requiring power-intensive parameter configuration signaling. This self-service mechanism maintains synchronization precision while minimizing power consumption.
Solution Approach 2:
The physical layer parameters are made available in advance through system information or previous connected-state configurations, allowing the UE to perform precise downlink synchronization in non-connected states without real-time parameter acquisition. This preliminary availability ensures synchronization precision while reducing the power needed for parameter configuration.
Data Source
AI summary
A method for information transmission, performed by a base station, and including: sending physical layer parameter information of a tracking reference signal (TRS) and/or a channel state information reference signal (CSI-RS), wherein the physical layer parameter information is used for indicating a first physical layer parameter used by a user equipment (UE) in a non-connected state when receiving the TRS and/or the CSI-RS.