Sidelink Resource Selection Around DRX Reception Windows
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The introduction of a Discontinuous Reception (DRX) mechanism in sidelink transmission poses a challenge in ensuring the reliability of sidelink transmission for unicast and multicast communications, as terminal devices may not always be in a state to receive data, leading to power consumption issues and potential data loss.
Innovation Solution
A resource selection method where a first terminal device obtains DRX configuration information for a second terminal device and selects transmission resources within a determined time range based on this information to ensure data reception, using schemes like receiving DRX configuration directly from the second terminal device, obtaining it through a group head, or determining it from pre-configuration, thereby ensuring the second terminal device remains in a continuous sensing state during data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a DRX mechanism is introduced in sidelink transmission to reduce power consumption, then power saving is improved, but reliability of sidelink transmission deteriorates
Solution Approach 1:
The transmitting terminal performs preliminary actions by determining the DRX configuration of the receiving terminal before transmission, identifying the on duration time ranges when the receiver is active, and selecting transmission resources that fall within these ranges. This preliminary planning ensures that transmissions are scheduled during periods when the receiving terminal is guaranteed to be in continuous reception state, thereby maintaining reliability while utilizing DRX for power saving.
Solution Approach 2:
The system dynamically adapts transmission resource selection based on the DRX configuration of the receiving terminal. The transmitting terminal adjusts its resource selection strategy according to the variable on duration time ranges, making the transmission process dynamic and responsive to the receiver's power saving state, thus resolving the contradiction between power saving and reliability.
2Reliability
If terminal devices remain in continuous reception state to ensure reliable data reception, then reliability is improved, but power consumption increases
Solution Approach 1:
The transmitting terminal performs preliminary determination of the receiving terminal's DRX configuration and identifies the on duration time ranges in advance. By selecting transmission resources that fall within these pre-identified active periods, the system ensures reliable reception without requiring the terminal to maintain continuous reception state, thus reducing power consumption while maintaining reliability.
3Adaptability or versatility
If transmission resources are selected outside the on duration time range to enable transmission flexibility, then transmission flexibility is improved, but data reception reliability deteriorates
Solution Approach 1:
The transmitting terminal performs preliminary determination of the receiving terminal's DRX configuration and identifies the on duration time ranges before selecting transmission resources. This ensures that resource selection is constrained to periods when the receiver is actively listening, guaranteeing reception reliability while maintaining flexibility within those bounded time windows.
Solution Approach 2:
The system applies different quality requirements to different time periods: within on duration time ranges, full transmission flexibility is available; outside these ranges, transmission is restricted or prohibited. This local differentiation of transmission quality based on time period ensures reliability during critical reception windows while allowing flexibility elsewhere.
Data Source
AI summary
Embodiments of the present disclosure provide a resource selection method and apparatus, and a terminal device. The method includes: obtaining, by a first terminal device, first Discontinuous Reception (DRX) configuration information used for determining a first time range for a second terminal device; and selecting, by the first terminal device, a first resource having a time domain position located within the first time range.