Base Station Reference Signal Indication for UE Synchronization
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Solution Overview
Problem
Existing communication technologies face challenges in accurately informing User Equipment (UE) about the availability state of Tracking Reference Signal (TRS)/Channel State Information-Reference Signal (CSI-RS) configurations, leading to potential power consumption issues and synchronization inaccuracies.
Innovation Solution
A method where a base station sends indication information about the availability state of TRS/CSI-RS configurations to UE, using physical layer signaling or system information, to ensure accurate synchronization and power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the base station sends indication information of the reference signal only once, then the signaling overhead is reduced, but the reliability of information transmission deteriorates due to potential loss or failure in single transmission
Solution Approach 1:
The base station sends indication information of the reference signal at least once (periodically or repeatedly) instead of a single transmission. This periodic action ensures that the UE can successfully receive the availability state information even if some transmissions are lost, thereby improving reliability without significantly increasing overall signaling overhead.
Solution Approach 2:
The base station transmits the indication information multiple times in advance to cushion against potential transmission failures. By sending the information repeatedly before the UE needs to act on it, the system ensures that at least one transmission will be successfully received, providing a buffer against communication reliability issues.
2Reliability
If the base station sends indication information multiple times, then the reliability of information transmission is improved, but the signaling overhead increases
Solution Approach 1:
The base station sends the indication information at least once (partial action sufficient for most cases) but reserves the option to send it multiple times when needed. This partial action approach achieves adequate reliability for normal operations while avoiding excessive signaling overhead in routine scenarios.
Solution Approach 2:
The transmission parameters (such as transmission power, frequency resources, or time intervals) of the indication information can be dynamically adjusted based on channel conditions and UE feedback. This allows the system to achieve reliable transmission with optimized signaling overhead by adapting parameters rather than simply increasing transmission count.
3Measurement precision
If the UE wakes up long in advance to synchronize with SSB, then synchronization accuracy is achieved, but power consumption increases
Solution Approach 1:
The base station sends indication information of the reference signal in advance to inform the UE about the availability state of TRS/CSI-RS configurations. This preliminary action allows the UE to plan its wake-up schedule more efficiently, achieving necessary synchronization accuracy while minimizing unnecessary early wake-ups and reducing power consumption.
Solution Approach 2:
The system dynamically adjusts the synchronization approach based on the indication information received. When TRS/CSI-RS is available and configured closer to the Paging Occasion, the UE can wake up later and use these reference signals for synchronization. When not available, the UE falls back to using SSB, creating a dynamic adaptation that optimizes both synchronization accuracy and power consumption.
4Use of energy by moving object
If the UE uses TRS/CSI-RS for synchronization, then power consumption is reduced, but the reliability of synchronization deteriorates when the reference signal is not properly configured or available
Solution Approach 1:
The base station provides indication information to the UE about the availability state of TRS/CSI-RS configurations. This feedback mechanism allows the UE to reliably determine whether to use TRS/CSI-RS for synchronization or fall back to SSB, ensuring synchronization reliability while optimizing power consumption based on actual signal availability.
Solution Approach 2:
The indication information acts as an intermediary between the base station's reference signal configuration and the UE's synchronization decision. This intermediary provides the UE with reliable information about TRS/CSI-RS availability, enabling the UE to make informed synchronization choices that balance power consumption and reliability without directly accessing the reference signals themselves.
Data Source
AI summary
A method for processing a reference signal is performed by a base station, and includes: sending indication information of the reference signal at least once, wherein the indication information is configured to indicate an availability state of configuration of the reference signal.