Wakeup Signal Driven Reference Transmission for Terminal Power Saving
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Solution Overview
Problem
Existing wireless communication systems consume excessive power due to continuous transmission of reference signals, which is inefficient for terminals in idle or low-activity states.
Innovation Solution
Implementing an on-demand reference signal transmission method where a wakeup signal is sent to terminals, allowing them to quickly receive reference signals only when needed, thereby reducing power consumption by minimizing unnecessary signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference signals are transmitted continuously to ensure terminal synchronization and channel estimation, then measurement precision and reliability are improved, but terminal power consumption increases
Solution Approach 1:
The patent implements periodic reference signal transmission where the network side transmits reference signals at predetermined intervals rather than continuously. The terminal enters sleep mode between transmission periods and wakes up to receive signals, perform measurements, and then returns to sleep mode. This periodic operation maintains necessary measurement precision while dramatically reducing terminal power consumption during idle periods.
Solution Approach 2:
The patent introduces dynamic wake-up signals that allow the terminal to adaptively adjust its reception behavior. The terminal monitors for wake-up signals before entering sleep mode, and only wakes up when actually needed to receive reference signals. This dynamic control mechanism optimizes the balance between measurement requirements and power consumption based on real-time network conditions.
2Productivity
If reference signals are transmitted frequently to enable quick synchronization and RRM measurements, then productivity and response time are improved, but power consumption increases
Solution Approach 1:
The patent employs preliminary action by having the terminal perform synchronization and RRM measurements in advance during wake-up periods before actually needing to transmit or receive data. The terminal uses received reference signals to update channel state information and synchronize timing ahead of time, so when data transmission is required, the terminal is already prepared and can quickly resume operation without needing frequent wake-ups.
3Loss of time
If the terminal remains in active state to quickly receive reference signals, then response time is reduced, but power consumption increases
Solution Approach 1:
The terminal alternates between active and sleep states in periodic cycles. During active periods, the terminal is ready to receive reference signals immediately, minimizing reception delay. During sleep periods, the terminal conserves power by turning off its receiver. The periodic cycle is optimized so that the terminal wakes up just in time to receive reference signals before returning to sleep, thus achieving low delay with reduced power consumption.
Solution Approach 2:
The patent implements feedback mechanisms where the network side monitors terminal performance and adjusts reference signal transmission timing and frequency accordingly. When the network detects that a terminal is approaching its next scheduled wake-up time, it can proactively transmit wake-up signals or adjust reference signal timing to ensure the terminal is awake and ready to receive, thereby minimizing actual reception delay while maintaining power-saving operation.
Data Source
AI summary
Disclosed are a signal transmission method and device for realizing transmission of a triggered reference signal, to enable a terminal to immediately utilize a reference signal to perform a corresponding operation, lower power consumption of the terminal, and to achieve power saving effects. The embodiments of the present application provide a signal transmission method at a network side, the method comprising: sending to a terminal a wakeup signal used to wake up the terminal; and sending a reference signal to the terminal; or sending to a terminal a wakeup signal used to wake up the terminal and a message indicating whether the network side will send a reference signal.