DRX onDuration Timer Control for Wireless Power Saving
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Solution Overview
Problem
Current DRX configurations in wireless communication systems are inflexible and lead to unnecessary power consumption as user equipment (UE) continues to monitor the PDCCH even after a new DRX configuration is received, due to the inability to efficiently stop the onDuration timer when a reconfiguration is applied.
Innovation Solution
A method and apparatus for configuring DRX operations in wireless communication systems, where the UE starts and stops the onDuration timer based on changes in the DRX configuration received from the eNB, allowing for rapid adaptation to new DRX settings and preventing unnecessary PDCCH monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continuously monitors the downlink channel to maintain always-on characteristic, then the connection reliability is improved, but the battery consumption increases
Solution Approach 1:
The patent implements dynamic DRX configuration where the UE can switch between continuous monitoring mode (for always-on characteristic) and discontinuous monitoring mode (for battery saving). The onDuration timer is dynamically controlled based on received DRX configurations, allowing the UE to adapt its monitoring behavior from continuous to intermittent based on network instructions, thus resolving the contradiction between connection reliability and battery consumption
2Use of energy by moving object
If a fixed DRX configuration is applied to reduce battery consumption, then the power saving is improved, but the adaptability to network scheduling changes deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the UE receives DRX configuration messages from the eNB and uses this feedback information to adjust its monitoring behavior. When a new DRX configuration is received, the UE compares it with the previous configuration and updates the onDuration timer accordingly. This feedback loop enables the fixed DRX configuration to adapt dynamically to network scheduling changes while maintaining power saving benefits
Solution Approach 2:
The patent changes the parameter of onDuration timer behavior based on received DRX configuration messages. When a new configuration is received, the system modifies the onDuration timer state (starting, stopping, or extending) according to the configuration parameters. This parameter change mechanism allows the DRX operation to adapt to network scheduling changes while maintaining the power saving advantages of configured DRX modes
3Duration of action of stationary object
If the onDuration timer continues running after receiving a new DRX configuration, then the monitoring continuity is improved, but the unnecessary power consumption increases
Solution Approach 1:
The patent applies preliminary action by having the UE stop the onDuration timer before the new DRX configuration takes effect. When a new configuration is received, the UE immediately stops the current onDuration timer and then starts a new one based on the configuration parameters. This preliminary stopping action prevents unnecessary power consumption from continuing to monitor the PDCCH under the old configuration, while the new timer ensures monitoring continuity under the updated configuration
Data Source
AI summary
A method for configuring a DRX (Discontinuous Reception) operation in a wireless communication system, and a wireless device therefore are discussed. The method includes, for example, receiving a first configuration for the DRX; starting a first onDuration timer according to the first configuration; receiving a second configuration for the DRX while the first onDuration timer is running; and stopping the first onDuration timer when the second configuration is received from the transmitter. At least one physical downlink control channel (PDCCH) is not monitored when the first onDuration timer is stopped. The first OnDuration timer is stopped without receiving a DRX Command medium access control (MAC) control element (CE). The method further includes starting a second onDuration timer according to the second configuration; and monitoring at least one PDCCH during an operation time of the second onDuration timer after the second onDuration timer starts according to the second configuration.