Sidelink Resource Pool Alignment for DRX-Configured UEs
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Solution Overview
Problem
Communications between differently-configured user equipment (UEs), such as Rel-16 and Rel-17 UEs, are unreliable due to misaligned resource selections, particularly when Rel-16 UEs are not configured for sidelink discontinuous reception (DRX) and attempt to communicate with Rel-17 UEs using non-compatible resources.
Innovation Solution
Configuring a dedicated resource pool for a first UE to align with the sidelink DRX duration of a second UE, enabling communication by using resources that overlap with the DRX mode of the second UE, even if the first UE is not originally configured for DRX.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If Rel-16 UEs use non-DRX resource selections for communication, then device complexity is reduced, but communication reliability deteriorates when interacting with Rel-17 UEs using DRX mode
Solution Approach 1:
The patent implements dynamic resource pool configuration where the network can assign different resource pools to UEs based on their DRX capabilities. Rel-17 UEs with DRX support are configured with DRX-aligned resource pools, while Rel-16 UEs without DRX are assigned non-DRX resource pools. This dynamic adaptation resolves the contradiction by allowing each UE to operate with appropriate complexity for its capabilities while ensuring reliable communication through proper resource alignment.
Solution Approach 2:
The patent changes the resource pool configuration parameters based on UE DRX capability. The network configures specific resource pool parameters (such as time-frequency resources, periodicity) that align with DRX cycles for Rel-17 UEs, while maintaining standard configurations for Rel-16 UEs. This parameter differentiation enables reliable communication between differently-configured UEs without forcing all devices to adopt complex DRX configurations.
2Reliability
If dedicated resource pools are configured for DRX alignment, then communication reliability improves, but device complexity increases
Solution Approach 1:
The patent segments the overall resource pool into multiple dedicated resource pools, each tailored for specific UE types (DRX-capable and non-DRX). This segmentation allows the system to provide DRX-aligned resources to Rel-17 UEs while maintaining standard resources for Rel-16 UEs, thereby improving reliability for DRX UEs without forcing non-DRX UEs to deal with complex DRX configurations.
Solution Approach 2:
The network acts as an intermediary that manages the complexity of DRX resource pool configuration. Instead of requiring UEs to independently manage DRX alignment complexity, the network configures and assigns appropriate resource pools based on UE capabilities. This intermediary approach shields UEs from the complexity while ensuring proper DRX alignment for reliable communication.
3Productivity
If resource selection is optimized for DRX mode, then communication efficiency improves, but adaptability to differently-configured UEs deteriorates
Solution Approach 1:
The patent implements a universal resource pool configuration mechanism that serves multiple UE types simultaneously. The system designs resource pools that can function effectively for both DRX-capable Rel-17 UEs and non-DRX Rel-16 UEs. By creating resource pools with flexible parameters that can accommodate different UE configurations, the system achieves both optimized efficiency for DRX UEs and broad adaptability across different UE types.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may identify a set of resources for communication with a second UE, wherein the set of resources includes a subset of resources overlapping with a discontinuous reception (DRX) mode on duration of the second UE. The first UE may communicate with the second UE using one or more resources of the set of resources. Numerous other aspects are described.