Sidelink DRX Configuration for Wireless Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, user equipment (UE) may miss opportunities for sidelink communication due to mismatched discontinuous reception (DRX) configurations between access links and sidelinks, leading to inefficient power consumption and missed resource grants.
Innovation Solution
Configuring a sidelink-specific DRX mode that differs from the access link DRX mode, allowing UEs to receive information identifying sidelink DRX configurations and operate accordingly, ensuring they monitor physical downlink control channels during sidelink resource periods, thus avoiding missed resource grants and optimizing power consumption based on traffic patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a UE uses access link DRX configuration for sidelink communication, then power consumption is optimized for access link traffic patterns, but the UE may miss sidelink resource grants due to mismatched DRX cycles and sidelink resource pool timing
Solution Approach 1:
The patent divides the DRX configuration into separate access link DRX parameters and sidelink DRX parameters. The UE can independently configure drx-OnDurationTimer, drx-InactivityTimer, and other DRX parameters specifically for sidelink operations, allowing optimization for sidelink traffic patterns while maintaining access link DRX settings. This segmentation enables the UE to monitor PDCCH during sidelink resource pools without being constrained by access link DRX cycles.
Solution Approach 2:
The patent enables dynamic switching between access link DRX mode and sidelink DRX mode based on the active communication link. When sidelink communication is detected or configured, the UE activates sidelink-specific DRX parameters that are tailored to sidelink resource pool timing. This dynamic adaptation ensures the UE maintains appropriate wake schedules for the currently active link, preventing missed grants while optimizing power consumption for the specific traffic pattern.
2Loss of energy
If a UE extends inactive times to optimize power consumption during light traffic patterns, then energy efficiency improves, but the UE cannot receive control information for sidelink transmission or reception resources
Solution Approach 1:
The patent configures sidelink-specific DRX parameters in advance, including drx-OnDurationTimer and drx-InactivityTimer values that are pre-calculated to align with sidelink resource pool periods. This preliminary configuration ensures that when the UE enters DRX mode, it will naturally wake up at the correct times to monitor for sidelink control information, eliminating the need to extend inactive times at the cost of missing grants. The pre-configured timers create a schedule that proactively prevents information loss.
3Device complexity
If a single DRX configuration is used for both access link and sidelink, then device complexity is reduced, but traffic pattern optimization fails due to different traffic characteristics on each link
Solution Approach 1:
The patent applies local quality by creating sidelink-specific DRX parameters that are tailored to the unique characteristics of sidelink traffic patterns. Instead of using a blanket DRX configuration for all links, the UE maintains separate drx-OnDurationTimer, drx-InactivityTimer, and other DRX parameters that can be independently optimized for sidelink operations. This localized optimization allows each link type to have DRX settings matched to its specific traffic characteristics while maintaining a unified overall DRX framework.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive information identifying a sidelink discontinuous reception (DRX) configuration, that is different from an access link DRX configuration, associated with operation in a sidelink communication deployment. The UE may monitor a physical downlink control channel (PDCCH) discontinuously using the sidelink DRX configuration. Numerous other aspects are described.