Paging Wake-Up Signaling for Low-Power RRC Idle Reception
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Solution Overview
Problem
Existing communication systems face challenges in reducing power consumption of terminal devices in Radio Resource Control (RRC) non-connected states, particularly due to periodic reception of paging messages.
Innovation Solution
Implementing a DRX enhancement mechanism that includes energy-saving signals to selectively wake up terminal devices during DRX cycles based on paging energy-saving configuration information for groups of terminal devices, allowing devices to skip PDCCH monitoring when no data transmission is expected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal devices in RRC non-connected state periodically receive paging messages, then they can be notified of incoming data or system updates, but power consumption increases significantly
Solution Approach 1:
The patent implements discontinuous reception (DRX) cycles where terminal devices alternately wake up to monitor paging messages and enter sleep mode to conserve energy. The network device sends wake-up indicators before actual paging messages, allowing terminals to selectively activate only when necessary, thus reducing overall power consumption while maintaining reliable paging delivery
2Speed
If terminal devices monitor PDCCH continuously, then they can detect scheduling information promptly, but energy consumption increases
Solution Approach 1:
The network device sends wake-up indicators in advance before transmitting actual paging messages or scheduling information. Terminal devices monitor for these preliminary indicators and only activate full PDCCH monitoring when a wake-up indicator is detected, enabling prompt response to actual data while avoiding continuous monitoring energy consumption
3Loss of time
If terminal devices wake up frequently to check for paging messages, then they can respond to incoming data quickly, but battery life decreases
Solution Approach 1:
The wake-up indicator serves as an intermediary signal between the network device and terminal devices. Instead of terminals continuously monitoring for actual paging messages (which consumes battery), they monitor for the low-power wake-up indicator. This intermediary mechanism enables quick response to actual data transmissions while significantly reducing battery consumption during idle periods
Data Source
AI summary
An energy saving method, a terminal device, and a network device, capable of implementing energy saving of a terminal device in an RRC disconnected state, the method comprising: a terminal device receives first information, the first information comprising paging energy saving configuration information corresponding respectively to each terminal device group amongst a plurality of terminal device groups, each terminal device group comprising at least one terminal device, and the paging energy saving configuration information corresponding to each terminal device group being used for determining whether the at least one terminal device in the terminal device group receives a paging message; and the terminal device performs paging message reception on the basis of the paging energy-saving configuration information corresponding to the terminal device group to which the terminal device belongs.