Power-Saving Signal Configuration for Wireless Terminal Paging
Solution Overview
Problem
In wireless communication systems, especially during discontinuous reception (DRX), terminals face challenges in power saving when using additional reference symbols, as existing mechanisms do not provide effective power-saving solutions for situations involving these symbols.
Innovation Solution
A method where a terminal sends auxiliary information to configure power-saving signals for monitoring paging messages, utilizing additional reference symbols like CSI-RS and TRS for time-frequency domain synchronization, allowing the terminal to wake up later and reduce unnecessary monitoring, thereby conserving power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal monitors PDCCH continuously during DRX activation period, then paging message detection reliability is improved, but power consumption increases
Solution Approach 1:
The terminal uses DRX (Discontinuous Reception) to periodically monitor PDCCH during activation periods instead of continuous monitoring. The power-saving signal further refines this by enabling the terminal to skip certain DRX activation periods when no paging message is expected, creating a multi-level periodic monitoring scheme that reduces power consumption while maintaining detection reliability.
Solution Approach 2:
The network transmits power-saving signals before the terminal enters DRX activation periods. By detecting these preliminary signals, the terminal can determine in advance whether it needs to wake up for PDCCH monitoring, avoiding unnecessary power consumption while ensuring it is ready when paging messages are actually transmitted.
2Measurement precision
If the terminal uses additional reference symbols for synchronization, then time-frequency synchronization accuracy is improved, but power consumption increases due to additional monitoring requirements
Solution Approach 1:
The patent applies different monitoring strategies to different signal types. Additional reference symbols are used locally only when high synchronization accuracy is needed, while power-saving signals provide a broader coordination mechanism. This localized application of reference symbols reduces overall power consumption compared to continuous high-precision synchronization.
Solution Approach 2:
The terminal dynamically adjusts its synchronization and monitoring behavior based on the power-saving signals received. When power-saving signals indicate low activity, the terminal can reduce synchronization frequency; when activity is expected, it increases monitoring intensity. This dynamic adaptation balances synchronization accuracy with power consumption.
3Loss of time
If the terminal wakes up earlier to monitor for potential paging messages, then paging detection timeliness is improved, but power consumption increases due to extended monitoring duration
Solution Approach 1:
Power-saving signals are transmitted in advance of potential paging messages, allowing the terminal to prepare for wake-up only when necessary. This preliminary indication eliminates the need for the terminal to wake up early in all cases, reducing power consumption while maintaining timely detection when paging messages are actually sent.
Solution Approach 2:
The network provides feedback through power-saving signals about whether paging messages will be transmitted in upcoming DRX periods. The terminal uses this feedback to intelligently adjust its wake-up timing, waking up early only when the feedback indicates potential paging activity, thereby balancing detection timeliness with power conservation.
Data Source
AI summary
A method for determining a power-saving signal, includes: sending first auxiliary information of a terminal in a case that use of an additional reference symbols is supported, the first auxiliary information being configured to determine a first power-saving signal supported by the terminal, and the first power-saving signal being configured for the terminal to monitor a paging message.