Wake-Up Signal Grouping for IoT Terminal Power Reduction
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Solution Overview
Problem
In wireless communications systems, particularly in IoT networks, terminals often experience 'false alarms' and excessive power consumption due to the need to monitor multiple wake-up signals for paging occasions, leading to inefficient power management and increased power usage.
Innovation Solution
The method involves determining a target wake-up signal specific to each terminal based on its group membership, allowing only necessary terminals to be woken up, thereby reducing the number of false alarms and conserving power by using dedicated or common wake-up signals tailored to specific terminal groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal monitors multiple wake-up signals for paging occasions, then the reliability of wake-up notification is improved, but the power consumption increases
Solution Approach 1:
The patent segments the wake-up signal monitoring by dividing terminals into different groups (first terminal group and second terminal group) with different monitoring behaviors. Terminals in the first group monitor only the first wake-up signal, while terminals in the second group monitor both the first and second wake-up signals. This segmentation allows the system to maintain reliable wake-up notification for all terminals while reducing power consumption for terminals that only need to monitor one signal.
2Reliability
If the terminal monitors the wake-up signal before the paging occasion, then the terminal can be woken up in time to receive paging messages, but false alarms occur when other terminals with the same PO are woken up unnecessarily
Solution Approach 1:
The patent segments wake-up signals into different types (first wake-up signal and second wake-up signal) that correspond to different terminal groups. By associating specific wake-up signals with specific terminal groups, the system ensures that when a wake-up signal is transmitted, only terminals belonging to the corresponding group are activated, eliminating false alarms for terminals with the same paging occasion but different group memberships.
Solution Approach 2:
The patent applies local quality by making different terminals have different monitoring characteristics based on their group membership. Terminals in the first terminal group have the local quality of monitoring only the first wake-up signal, while terminals in the second terminal group have the local quality of monitoring both wake-up signals. This localized differentiation ensures that each terminal monitors only the relevant wake-up signals for its specific needs, reducing unnecessary wake-ups and false alarms.
Data Source
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AI summary
This application provides a method for waking up a terminal, a terminal, and a network device. In technical solutions provided in this application, a network device determines, from a plurality of wake-up signals that can wake up a to-be-woken-up terminal and that need to be monitored by the to-be-woken-up terminal for one PO, a target wake-up signal of the to-be-woken-up terminal, and sends the target wake-up signal to the to-be-woken-up terminal. If the terminal detects, for the one PO, at least one wake-up signal of the plurality of wake-up signals that can wake up the terminal and that need to be monitored by the terminal, the terminal monitors a downlink control channel at the PO. The technical solutions provided in this application help reduce a quantity of terminals on which a "false alarm" occurs. The method and the device provided in the embodiments of this application improve a coverage capability of a network, and may be applied to the Internet of Things, for example, MTC, IoT, LTE-M, and M2M.