Sidelink DRX Wakeup Control Based on Resource Availability
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Solution Overview
Problem
The application of Discontinuous Reception (DRX) technology in communication between terminals and access network devices is limited to traditional scenarios, and there is a need to explore its application in new contexts, particularly for sidelink communication to optimize power consumption.
Innovation Solution
A method and apparatus for controlling wakeup time in terminals based on available resources in a sidelink communication resource pool, including controlling timers such as On Duration, Inactivity, and DRX Retransmission Timers to minimize power consumption by pausing or starting these timers based on resource availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals continuously monitor PDCCH in wakeup state, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies periodic action by implementing DRX cycles where terminals alternately wake up to monitor PDCCH and enter sleep state to save power. The terminal wakes up at specific intervals (drx-OnDurationTimer, drx-InactivityTimer) to monitor for scheduling information, then returns to sleep state, creating a periodic monitoring pattern that balances reliability and power consumption.
Solution Approach 2:
The patent applies dynamics by making the monitoring behavior adaptive based on resource availability. When resources are available in the resource pool, the terminal extends its wakeup state to monitor and utilize resources; when resources are unavailable, the terminal returns to sleep state sooner, dynamically adjusting monitoring duration based on actual communication needs.
2Productivity
If terminals extend wakeup state to monitor more resources, then resource utilization is improved, but power consumption increases
Solution Approach 1:
The patent applies feedback by having the terminal check resource pool availability and adjust its monitoring behavior accordingly. The terminal monitors the resource pool status and uses this feedback to determine whether to extend or shorten its wakeup state, creating a closed-loop control system that optimizes resource utilization based on actual availability.
Solution Approach 2:
The patent applies dynamics by making the monitoring duration flexible and adaptive. Instead of fixed monitoring periods, the terminal dynamically adjusts the length of its wakeup state based on real-time resource availability conditions, extending monitoring when resources are available and reducing monitoring when resources are scarce.
3Reliability
If terminals monitor PDCCH during entire wakeup state, then scheduling information reception is improved, but unnecessary monitoring power consumption increases
Solution Approach 1:
The patent applies partial action by having the terminal monitor PDCCH only during necessary portions of the wakeup state rather than the entire duration. The terminal monitors during critical periods when scheduling information is expected (based on resource availability) and reduces or stops monitoring during periods when no resources are available, performing only the necessary monitoring action.
Solution Approach 2:
The patent applies dynamics by making the monitoring intensity and duration variable. The terminal adjusts its monitoring behavior dynamically based on resource pool status, intensifying monitoring when resources are available and reducing monitoring when resources are unavailable, optimizing the balance between reception reliability and energy consumption.
Data Source
AI summary
A method and device for wakeup time control. A first terminal determines available resources in a resource pool. The available resources are resources for sidelink communication between the first terminal and a second terminal. The first terminal controls the time when the first terminal is in a wakeup state on the basis of the available resources.