Reference Signal Validity for Low-Power UE Paging
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Solution Overview
Problem
User equipment (UE) in idle mode needs to wake up frequently for AGC adjustment and channel tracking using synchronization signal blocks, leading to prolonged wake-up times and increased power consumption, while introducing additional reference signals can increase system overhead.
Innovation Solution
Determine the validity of a reference signal using configuration information to optimize system overhead and reduce unnecessary wake-up times by performing AGC adjustment and channel tracking only with the last synchronization signal block before a paging occasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE wakes up frequently for AGC adjustment and channel tracking using synchronization signal blocks, then channel tracking accuracy is improved, but UE power consumption increases and wake-up time is prolonged
Solution Approach 1:
The network device transmits the reference signal in advance before the paging occasion, allowing the UE to perform AGC adjustment and channel tracking beforehand. This preliminary action enables the UE to be fully prepared for incoming paging information without needing to wake up frequently during the actual paging moment, thus reducing power consumption while maintaining tracking accuracy.
Solution Approach 2:
The reference signal acts as an intermediary element between the synchronization signal block and the paging occasion. Instead of relying solely on the synchronization signal block for both tracking and paging monitoring, the reference signal serves as a dedicated mediator that enables efficient AGC adjustment and channel tracking, allowing the UE to sleep longer and consume less power.
2Reliability
If additional reference signals are introduced for AGC adjustment and channel tracking, then tracking performance is improved, but system overhead increases
Solution Approach 1:
The reference signal is transmitted only in specific time windows before the paging occasion rather than continuously. This local quality approach ensures that the reference signal is available when needed for AGC adjustment and channel tracking, while avoiding unnecessary transmission during other times, thus improving tracking performance without proportionally increasing system overhead.
Solution Approach 2:
The reference signal is transmitted periodically in predetermined time windows before each paging occasion. This periodic action pattern allows the network to provide tracking assistance at optimal intervals without maintaining continuous transmission, balancing tracking performance requirements with system overhead reduction.
3Reliability
If UE wakes up before the last synchronization signal block for AGC adjustment and channel tracking, then tracking accuracy is improved, but wake-up time is prolonged
Solution Approach 1:
The reference signal is transmitted in advance before the paging occasion, enabling the UE to perform AGC adjustment and channel tracking in advance. This preliminary action allows the UE to wake up later, closer to the actual paging moment, while still achieving accurate tracking, thus reducing the wake-up time window.
Solution Approach 2:
The reference signal serves as an intermediary that bridges the gap between the last synchronization signal block and the paging occasion. It provides the necessary tracking information in a condensed timeframe, allowing the UE to achieve accurate tracking with a shorter wake-up period rather than needing to wake up earlier for extended tracking procedures.
Data Source
AI summary
The present disclosure provides a method and apparatus for determining a reference signal, and an electronic device and a storage medium, where configuration information is acquired; and it is determined that whether a reference signal is valid according to the configuration information. Determination of whether the reference signal is valid is implemented through the configuration information. Furthermore, the UE only needs to be waken up before a last synchronization signal block before a PO, and implements AGC adjustment, channel tracking and measurement through the last synchronization signal block and the reference signal.