Wake-Up Radio Link Switching for Low-Power Connected Terminals
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Solution Overview
Problem
Terminal devices operating in a connected state on a main link in wireless communication systems experience high power consumption and energy overheads.
Innovation Solution
Implementing a communication method where the terminal device monitors a wake-up signal (WUS) over a first link during inactive time and switches to a second link for active communication, reducing power consumption by minimizing operation on the main link.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device operates on the main link to receive data, then the data transmission reliability is improved, but the power consumption increases
Solution Approach 1:
The patent segments the communication functionality by introducing a wake-up radio (WUR) link separate from the main link. The WUR link handles wake-up signal monitoring while the main link handles data transmission, allowing the terminal to operate on low-power WUR link during inactive periods and switch to main link only when necessary, thus reducing overall power consumption while maintaining reliability.
Solution Approach 2:
The terminal device periodically monitors wake-up signals on the WUR link during inactive time and switches to the main link only when a wake-up signal is detected or at scheduled intervals. This periodic monitoring approach ensures data transmission reliability is maintained when needed while minimizing power consumption during inactive periods.
2Reliability
If the terminal device monitors wake-up signal and PDCCH over the main link, then the communication reliability is improved, but the power consumption increases
Solution Approach 1:
The patent separates wake-up signal monitoring from main communication operations by implementing a dedicated WUR link. The terminal monitors wake-up signals exclusively on the WUR link during inactive time, and only switches to the main link for PDCCH monitoring when actually needed, thereby maintaining communication reliability while significantly reducing power consumption compared to continuous main link operation.
Solution Approach 2:
The WUR link acts as an intermediary between the terminal device and the network during inactive periods. It receives and processes wake-up signals, serving as a low-power mediator that determines when the terminal should activate its main communication circuits, thus reducing overall power consumption while maintaining reliable communication readiness.
3Productivity
If the terminal device operates continuously on the main link, then the data transmission speed is improved, but the energy efficiency deteriorates
Solution Approach 1:
The terminal device employs periodic wake-up signal monitoring on the WUR link instead of continuous main link operation. When no wake-up signals are detected during inactive periods, the terminal remains in a low-power state, reducing energy loss. When wake-up signals are detected or data transmission is required, the terminal switches to the main link to achieve high data transmission speeds, thus balancing productivity and energy efficiency.
Solution Approach 2:
The terminal dynamically switches between operating states based on wake-up signal detection and data transmission requirements. During inactive time without wake-up signals, the terminal operates in a low-power state on the WUR link. When wake-up signals are detected or active time occurs, the terminal transitions to high-performance main link operation, optimizing the balance between data transmission speed and energy efficiency according to actual needs.
Data Source
AI summary
This application provides a communication method, a terminal device, and a network device, and relates to the field of wireless communication technologies. In this application, power consumption can be reduced. The method is applied to a terminal device in a connected state, and includes: The terminal device monitors a wake up signal WUS from a network device over a first link in inactive time of the terminal device. If the WUS is detected, the terminal device monitors a physical downlink control channel PDCCH from the network device over a second link in active time of the terminal device. Power consumption of the terminal device operating on the first link is less than power consumption of the terminal device operating on the second link. The first link may be a wake up radio WUR link, and the second link may be a main link.