Terminal PDCCH Monitoring via Wake-Up Signal
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) experiences unnecessary power consumption due to waking up during DRX ON durations when no data transmission or reception is performed, leading to inefficient PDCCH monitoring.
Innovation Solution
A method where the UE receives power-saving information from the network to dynamically adjust its monitoring state, allowing it to wake up or sleep during DRX ON periods based on specific signals like WUS or GTS, thereby optimizing PDCCH monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal performs PDCCH monitoring during all DRX ON durations, then the terminal can detect data transmission opportunities, but the terminal consumes unnecessary power when no data transmission/reception is performed
Solution Approach 1:
The network transmits a wake-up signal before the DRX ON duration to preliminarily indicate whether data transmission will occur. The terminal receives this advance information and decides whether to wake up for PDCCH monitoring, avoiding unnecessary power consumption while ensuring data detection when needed.
Solution Approach 2:
The terminal autonomously decides whether to perform PDCCH monitoring based on the received wake-up signal indication. When the wake-up signal indicates no data transmission, the terminal self-determines to skip PDCCH monitoring and remain in sleep mode, thereby saving power without external control.
2Use of energy by moving object
If the terminal skips PDCCH monitoring during DRX ON duration to save power, then power consumption is reduced, but the terminal may miss data transmission opportunities
Solution Approach 1:
The network provides feedback through the wake-up signal about whether data transmission is scheduled. This feedback mechanism allows the terminal to make informed decisions about PDCCH monitoring, ensuring data detection reliability when transmission is planned while enabling power saving when no transmission is scheduled.
Solution Approach 2:
The wake-up signal provides preliminary information about upcoming data transmission before the actual DRX ON duration. This advance notification allows the terminal to prepare appropriately, waking up for PDCCH monitoring only when data transmission is expected, thus maintaining reliability while reducing power consumption.
Data Source
AI summary
The present specification provides a method of performing physical downlink control channel (PDCCH) monitoring by a terminal in a wireless communication system, comprising the steps of: receiving, from a network, information related to power saving; and performing the PDCCH monitoring on the basis of the received information related to the power saving, wherein the information related to the power saving, which is a single piece of information, is information indicating at least one of whether the terminal is to perform a wake-up operation or whether the terminal is to perform a sleep operation.