Downlink Control Signaling for 5G Terminal Energy Saving
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Solution Overview
Problem
The high energy consumption of terminal devices in 5G networks due to continuous blind detection of downlink control channels is a significant challenge.
Innovation Solution
A method and device configuration that utilizes new or existing downlink control information fields to indicate an energy saving state and duration, allowing terminal devices to adjust their power consumption based on network data transmission needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device performs continuous blind detection of PDCCH to receive DCI, then the terminal device can reliably receive downlink control information, but the energy consumption of the terminal device increases significantly
Solution Approach 1:
The patent implements periodic blind detection instead of continuous detection. The terminal device detects PDCCH only during configured monitoring occasions (e.g., every 10ms or at specific time intervals) rather than continuously, thereby reducing energy consumption while maintaining reliable DCI reception at critical moments
Solution Approach 2:
The network device performs preliminary action by sending wake-up signals or power saving indicators in advance before the terminal device needs to wake up from sleep mode. This allows the terminal to prepare for potential data transmission without unnecessary wake-ups, reducing energy consumption while ensuring reliability when data is actually transmitted
2Use of energy by moving object
If the terminal device enters sleep mode to reduce energy consumption, then energy saving is achieved, but the terminal device may miss important control information or data transmission opportunities
Solution Approach 1:
The patent implements feedback mechanisms where the network device sends power saving indicators or wake-up signals based on actual data transmission status. The terminal device uses this feedback information to intelligently decide when to wake up and when to remain in sleep mode, ensuring reliable data reception while maximizing energy savings
Solution Approach 2:
The patent makes the terminal device's operational state dynamic rather than static. The terminal can transition between sleep and active states based on real-time network conditions and configured parameters, allowing flexible adaptation to different transmission scenarios while maintaining reliability
Data Source
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AI summary
Embodiments of this application provide an information sending and receiving method and a communications device. The method includes: A network device configures first information. The first information includes a first field and/or a second field, the first field includes information indicating an energy saving state of a terminal device, and the second field includes information indicating a time length in which the terminal device maintains the energy saving state. Then, the network device sends the first information to the terminal device. In addition, the method includes: The terminal device receives the first information sent by the network device. Then, the terminal device reads the first field and/or the second field, and adjusts the energy saving state of the terminal device based on information obtained through reading. The technical solution provided in the embodiments of this application can reduce energy consumption of the terminal device to some extent.