Terminal DRX Active Duration Control for Lower PDCCH Power Use
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Solution Overview
Problem
Existing wireless communication technologies face challenges in balancing power consumption and data transmission delay during discontinuous reception (DRX) operations in terminals, as terminals often monitor physical downlink control channels (PDCCH) continuously, leading to increased power consumption and potential data transmission delays.
Innovation Solution
A method and apparatus for dynamically controlling DRX operations by adjusting the active duration and DRX cycle based on instructions from the base station, including extending or reducing the active duration through RRC reconfigurations and using DRX assistance information to optimize power consumption and data reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal performs continuous PDCCH monitoring, then data transmission reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) where the terminal periodically monitors PDCCH during active durations and remains inactive during sleep durations. This periodic monitoring approach reduces power consumption compared to continuous monitoring while maintaining data transmission reliability through scheduled wake-up periods.
Solution Approach 2:
The patent dynamically adjusts the active duration and DRX cycle based on instruction information received from the base station. The terminal modifies its monitoring behavior in real-time according to network conditions, extending active duration when data is expected and reducing it when power saving is prioritized, thus balancing reliability and energy consumption dynamically.
2Use of energy by moving object
If the terminal applies DRX function to reduce power consumption, then power consumption is reduced, but data transmission delay increases
Solution Approach 1:
The base station sends instruction information in advance to indicate whether the active duration should be extended. This preliminary indication allows the terminal to proactively extend its monitoring period when data is likely to arrive during the sleep duration, reducing transmission delay before the actual data reception occurs rather than reacting after delay has already happened.
Solution Approach 2:
The patent changes the parameter of active duration based on network conditions and instruction information. When the base station predicts data arrival during sleep duration, it sends instructions to extend the active duration, thereby reducing the time loss while maintaining power saving benefits. This dynamic parameter adjustment balances between power consumption and transmission delay.
3Reliability
If the terminal extends active duration to reduce data transmission delay, then data transmission reliability is improved, but power consumption increases
Solution Approach 1:
The terminal dynamically adjusts the active duration based on real-time instruction information from the base station. Rather than using a fixed extended duration, the system adapts the active period length according to actual network conditions, extending only when necessary to receive data during sleep duration, thus minimizing unnecessary power consumption while maintaining reliability when needed.
Solution Approach 2:
The base station provides feedback through instruction information that indicates whether the terminal should extend its active duration. This feedback mechanism ensures that extension occurs only when data is actually expected during sleep duration, preventing unnecessary energy consumption from overly aggressive extension while maintaining sufficient reliability when data arrival is predicted.
Data Source
AI summary
Disclosed are methods and apparatuses for reducing power consumption of a terminal. A method of a terminal may comprise: receiving, from a base station, discontinuous reception (DRX) configuration information; performing physical downlink control channel (PDCCH) monitoring in an active duration of a DRX cycle based on the DRX configuration information; receiving, from the base station, instruction information instructing adjustment of the active duration of the DRX cycle; adjusting a time length of the active duration based on the instruction information from the base station; and performing PDCCH monitoring in the active duration whose time length is adjusted.