Inter-UE Sidelink DRX Coordination for Active-Time Resource Allocation
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Solution Overview
Problem
Existing solutions lack effective inter-UE coordination when UEs are configured with sidelink DRX, leading to reduced available resource sets and potential resource collisions during active time durations.
Innovation Solution
A first terminal device transmits DRX configuration information to a second terminal device, which determines a set of resources for sidelink communication based on this information, and the first terminal device adjusts its resource allocation accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inter-UE coordination is implemented for sidelink communication, then communication reliability is improved, but resource availability is reduced due to DRX cycles
Solution Approach 1:
The patent applies preliminary action by having the first UE transmit DRX configuration information to the second UE before resource allocation occurs. This allows the second UE to determine available resources in advance considering the DRX cycles of both UEs, ensuring that resource coordination happens proactively during active time durations rather than reactively when conflicts arise.
Solution Approach 2:
The patent uses DRX configuration information as an intermediary element that mediates between the first UE and second UE. This information acts as a shared reference that enables both UEs to coordinate resource selection without direct continuous communication, allowing the second UE to determine resources that avoid collisions with the first UE's DRX active periods.
2Reliability
If resource allocation is adjusted to align with DRX cycles, then resource collision is avoided, but coordination complexity increases
Solution Approach 1:
The patent extracts the DRX configuration information (including active time duration and cycle parameters) from the complex coordination process and transmits it as separate, structured information to the second UE. This extraction simplifies the coordination by providing explicit parameters that the second UE can use directly for resource determination, rather than requiring complex real-time analysis of the first UE's DRX state.
Solution Approach 2:
The patent applies parameter changes by having the second UE determine resources based on specific DRX parameters (active time duration, cycle length) received from the first UE. The second UE uses these parameters to calculate and select resources that fall outside the first UE's active time durations, transforming the coordination problem into a parameter-based resource selection process.
Data Source
AI summary
Embodiments of the present disclosure relate to inter-user equipment coordination for sidelink discontinuous reception (DRX) UE. The method includes transmitting, to a second terminal device, a configuration information of discontinuous reception (DRX) associated with at least one of the first terminal device or a third terminal device. The method also includes receiving, from the second terminal device, a resource information indicating a first set of resources allocated for a sidelink communication between the first terminal device and the third terminal device. The method further includes determining a second set of resources for performing the sidelink communication based on the first set of resources and the configuration information.