Wake-Up Signal Detection for Low-Power PDCCH Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High power consumption in user equipment due to complex processing and large bandwidth operations in wireless communication systems, particularly when monitoring physical downlink control channels, is a significant challenge.
Innovation Solution
Implementing a wake-up mechanism where a base station sends a wake-up signal (WUS) to indicate whether a terminal needs to monitor the physical downlink control channel, allowing the terminal to skip unnecessary monitoring and reduce power consumption by using narrower frequency ranges and lower complexity detection methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal monitors the physical downlink control channel continuously, then the control information reception reliability is improved, but the power consumption increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) where the terminal alternates between active monitoring periods and sleep periods. During active periods, the terminal monitors the physical downlink control channel; during sleep periods, monitoring is suspended to save power. This periodic action resolves the contradiction by providing reliability during active periods while reducing power consumption during sleep periods.
Solution Approach 2:
The base station sends a wake-up signal before the terminal's active monitoring period to prepare the terminal for upcoming control channel monitoring. This preliminary action allows the terminal to wake up only when necessary, avoiding unnecessary power consumption while ensuring reliable reception when control information is actually transmitted.
2Productivity
If the terminal uses large bandwidth for high data rate transmission, then the productivity is improved, but the power consumption increases
Solution Approach 1:
The patent employs bandwidth adaptation where the terminal dynamically adjusts its operating bandwidth based on traffic requirements and channel conditions. When high data rates are needed, the terminal uses larger bandwidth; when traffic is light, the terminal reduces bandwidth to save power. This dynamic adjustment resolves the contradiction between productivity and power consumption.
3Productivity
If the terminal performs complex signal processing for high performance, then the productivity is improved, but the power consumption increases
Solution Approach 1:
The patent utilizes processing complexity adaptation where the terminal adjusts signal processing parameters such as modulation order, coding rate, and antenna ports based on channel quality and traffic requirements. When channel conditions are good and traffic demands high performance, complex processing is applied; when conditions are poor or traffic is light, processing complexity is reduced to save power, resolving the contradiction between productivity and power consumption.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A wireless communication method includes receiving, by a communication node, a first signal. The method further includes determining quasi co-location (QCL) information for the first signal based on at least one of a predefined rule and a configuration information from a base station, and performing a selective monitoring of a control channel based on information received in the first signal.