DRX ON Duration Configuration for UE Battery Optimization
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing radio resources, particularly in reducing battery consumption during discontinuous reception (DRX) operations, where the same ON duration is used for both short and long DRX cycles, leading to unnecessary battery waste in low-probability downlink transmission scenarios.
Innovation Solution
A method is introduced where a user equipment (UE) dynamically selects between short and long DRX cycles based on configuration information provided by the network, using different ON durations for each cycle, with the long DRX cycle having a shorter ON duration to conserve battery life without increasing transmission delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the same ON duration is used for both short and long DRX cycles, then the UE can maintain simple monitoring configuration, but battery consumption increases unnecessarily in low-probability downlink transmission scenarios
Solution Approach 1:
The patent applies local quality by configuring different ON durations for short and long DRX cycles specifically. The short DRX cycle uses a first ON duration while the long DRX cycle uses a second ON duration, allowing the monitoring behavior to be locally optimized for each DRX cycle type rather than using a uniform configuration across all cycles.
Solution Approach 2:
The patent implements dynamics by enabling the UE to dynamically select between short and long DRX cycles based on downlink transmission probability. The UE can switch between different DRX cycle configurations (with different ON durations) depending on traffic conditions, making the monitoring behavior adaptive rather than static.
2Reliability
If the UE uses a longer ON duration to ensure reliable PDCCH monitoring, then transmission reliability improves, but battery consumption increases
Solution Approach 1:
The patent applies parameter changes by introducing different ON duration parameters for short and long DRX cycles. The first ON duration for short DRX cycles and the second ON duration for long DRX cycles allow the system to adjust monitoring duration parameters based on the DRX cycle type and downlink transmission probability, optimizing the balance between reliability and energy consumption.
Solution Approach 2:
The patent implements dynamics by allowing the UE to dynamically select between short and long DRX cycles with different ON durations based on downlink transmission probability. This dynamic selection enables the system to adapt monitoring reliability and energy consumption to actual traffic conditions rather than using a fixed configuration.
3Loss of time
If the UE frequently monitors PDCCH to reduce transmission delay, then latency decreases, but battery consumption increases
Solution Approach 1:
The patent applies periodic action by implementing discontinuous reception with periodic DRX cycles. The UE monitors PDCCH periodically during ON durations and enters sleep mode during OFF durations, creating a rhythmic monitoring pattern that balances latency reduction with energy conservation rather than continuous monitoring.
Solution Approach 2:
The patent implements dynamics by allowing dynamic selection between short and long DRX cycles with different ON durations based on downlink transmission probability. This enables the system to adjust the periodic monitoring behavior dynamically - using shorter cycles with longer ON durations when transmission is likely, and longer cycles with shorter ON durations when transmission is unlikely.
Data Source
AI summary
A method for monitoring a physical downlink control channel (PDCCH) by a user equipment (UE) in a wireless communication system is disclosed. The method comprises steps of receiving configuration information of a short discontinuous reception (DRX) cycle and a long DRX cycle from a network, wherein the configuration information includes information about a first ON duration for the short DRX cycle and a second ON duration for the long DRX cycle; and monitoring the PDCCH during the first ON duration using the short DRX cycle or during the second ON duration using the long DRX cycle according to the configuration information, wherein the length of the second ON duration is shorter than the length of the first ON duration.