Terminal SSB Time Determination via Low-Power Wake-Up Signal
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Solution Overview
Problem
In New Radio (NR) systems, when a terminal is idle, the main communication module is disabled or set to a deep sleep state, leading to inaccurate time information. This results in high power consumption when the module is awakened and attempts to blindly detect Synchronization Signal Blocks (SSBs) within a large time range.
Innovation Solution
The terminal obtains time reference information from a first signal, such as a low-power beacon or wake-up signal, to determine SSB time information. This allows the terminal to shorten the time range for detecting SSBs, reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the main communication module is disabled or set to deep sleep state to reduce power consumption, then power consumption is reduced, but time information becomes inaccurate
Solution Approach 1:
The terminal performs time synchronization and obtains time reference information before entering the deep sleep state. This preliminary action ensures that when the terminal wakes up, it already has valid time information to determine the SSB detection time range, avoiding the need for blind detection across a large time range and thus reducing power consumption while maintaining time accuracy
Solution Approach 2:
The patent introduces a low-power wake-up module as an intermediary that remains active during deep sleep state to monitor wake-up signals. This intermediary component allows the terminal to maintain connection awareness with minimal power consumption while the main communication module stays in low-power state, enabling efficient time synchronization without continuous operation of the power-hungry main module
2Reliability
If the terminal blindly detects SSB within a large time range after awakening, then time synchronization can be achieved, but power consumption increases
Solution Approach 1:
The terminal determines the SSB detection time range in advance by using time reference information obtained before entering deep sleep state. This preliminary determination of the detection time range allows the terminal to wake up and perform targeted SSB detection within a specific, limited time window rather than blindly searching across a large time range, significantly reducing power consumption while ensuring reliable time synchronization
Solution Approach 2:
The patent changes the parameter of detection time range from a large, undefined range to a small, precisely determined range based on time reference information. By adjusting this critical parameter, the terminal reduces the detection time from potentially the entire SSB periodicity to a focused window, thereby reducing power consumption while maintaining synchronization reliability
Data Source
AI summary
An information determining method and a terminal are provided. The information determining method includes: obtaining time reference information of a first signal. The information determining method further includes determining Synchronization Signal Block (SSB) time information based on the time reference information.