Paging Wake-Up Timing for Terminals With Different Wake Capabilities
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Solution Overview
Problem
Existing paging methods fail to account for varying wake-up capabilities of terminal devices in a low-power wake-up signal (LP-WUS) mechanism, leading to inconsistent timing in entering a wake-up state and potential missed paging notifications.
Innovation Solution
A network device sends a first signal to terminal devices with first time information indicating the start time for monitoring a paging occasion, ensuring all devices with different wake-up capabilities can successfully receive paging notifications by adjusting the timing of their wake-up state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If terminal devices in LP-WUS mechanism use different wake-up capabilities, then power saving is improved, but paging reliability deteriorates due to inconsistent wake-up timing
Solution Approach 1:
The network device performs preliminary action by sending wake-up signals to terminal devices before the actual paging occasion. This allows devices with different wake-up capabilities to be notified in advance, enabling them to prepare for the paging procedure without missing the paging opportunity. The wake-up signal includes timing information that prepares the device for the subsequent paging message reception.
Solution Approach 2:
The system implements feedback mechanism where the network device receives feedback information from terminal devices about their wake-up status and capability. Based on this feedback, the network device adjusts the paging strategy by sending appropriate wake-up signals at different times, ensuring that all terminal devices with different wake-up capabilities can successfully receive paging notifications while maintaining power saving benefits.
2Measurement precision
If terminal devices perform time-frequency synchronization before monitoring PO, then paging monitoring accuracy is improved, but time consumption increases
Solution Approach 1:
The network device performs preliminary synchronization assistance by including timing information in the wake-up signal sent to terminal devices. This preliminary action allows the terminal device to skip the time-consuming time-frequency synchronization process before the paging occasion, as the synchronization parameters are already provided in advance through the wake-up signal and associated system information.
Solution Approach 2:
The wake-up signal acts as an intermediary that carries timing information and synchronization parameters from the network device to the terminal device. This intermediary mechanism transfers the synchronization data without requiring the terminal device to perform full time-frequency synchronization independently, thereby reducing time consumption while maintaining monitoring accuracy.
Data Source
AI summary
This application provides a paging method, an apparatus, and a system, to ensure that terminal devices with different wake-up capabilities can all be successfully paged by a network, and may be applied to 5G, 6G, and a future communication system. The method includes: determining first time information, and sending a first signal to a terminal device. The first time information indicates a start time for monitoring a paging occasion. The first signal indicates the terminal device to switch from a sleep state to a wake-up state, and the first signal includes the first time information.