Wake-Up Paging Scheme for Low-Power 5G IoT Terminals
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Solution Overview
Problem
Existing communication systems face high power consumption due to periodic paging message detection in terminal devices, particularly in 5G IoT devices lacking an external power source, as they must continuously perform measurements and check for potential paging messages.
Innovation Solution
Implementing a low-power wake-up module (LP-WUR) and LP-WUS to independently monitor for wake-up signals, allowing the main communication module to remain powered off, and introducing a new terminal device grouping mechanism for LP-WUS and paging occasions to reduce unnecessary detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal devices continuously perform periodic paging message detection, then paging messages can be detected reliably, but power consumption increases significantly
Solution Approach 1:
The patent divides terminal devices into different groups (first group and second group) with different paging detection behaviors. The first group performs periodic paging detection while the second group uses wake-up signals, segmenting the device population to balance reliability and power consumption across different scenarios
Solution Approach 2:
The patent introduces wake-up signals as an intermediary mechanism between the network and terminal devices in the second group. These wake-up signals trigger paging detection only when necessary, acting as a mediator that reduces unnecessary detection while maintaining reliable message delivery
2Loss of time
If terminal devices perform periodic paging detection, then paging messages are received timely, but unnecessary detections increase power consumption
Solution Approach 1:
The patent implements preliminary actions by having terminal devices in the second group enter a low-power state before actual paging occurs. The network sends wake-up signals in advance to trigger detection only when needed, preventing energy waste on unnecessary periodic detections while maintaining timely message reception
Solution Approach 2:
The patent transforms continuous periodic paging detection into conditional periodic action. Terminal devices in the second group perform detection only when wake-up signals are received, converting from fixed periodic detection to flexible periodic action triggered by external signals
Data Source
AI summary
Provided are a method and a device for wireless communication. One example method includes: receiving a first wake-up signal at a first occasion, wherein the first wake-up signal is to wake up a second communication module of a first terminal device, wherein the first terminal device comprises a first communication module and the second communication module, and the first wake-up signal is received through the first communication module of the first terminal device; and performing paging detection at a second occasion, wherein the paging detection is performed by the second communication module, the first occasion is determined based on a first waked terminal device group to which the first terminal device belongs, and the second occasion is determined based on the first waked terminal device group and a first paging device group to which the first terminal device belongs.