Inter-UE Coordination Sidelink Resource Allocation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently coordinating sidelink resource allocation and scheduling between user equipment (UEs) in New Radio (NR) networks, leading to potential resource conflicts and reduced communication reliability and performance.
Innovation Solution
The method involves UE-to-UE coordination through inter-UE coordination (IUC) requests and responses, which include indicating sidelink carriers, bandwidth parts, and resource pools, allowing UEs to determine and select optimal sidelink resources, and utilizing timer-based operations to manage resource allocation and scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UEs autonomously select sidelink resources without coordination, then resource allocation flexibility is improved, but resource conflicts and communication reliability deteriorate
Solution Approach 1:
The patent introduces an intermediary coordination mechanism where UEs exchange IUC requests and responses to share resource pool information and coordination data. This intermediary information exchange enables autonomous UEs to make informed resource selections while avoiding conflicts, thus maintaining flexibility while improving reliability.
Solution Approach 2:
The patent implements feedback through IUC response messages that contain coordination information about available resources, resource pool configurations, and interference conditions. This feedback loop allows UEs to adjust their resource selections based on real-time network conditions and other UEs' selections, resolving the contradiction between autonomous flexibility and conflict avoidance.
2Productivity
If UEs exchange detailed coordination information, then resource allocation efficiency is improved, but signaling overhead and device complexity increase
Solution Approach 1:
The patent segments coordination information into structured IUC request and response messages with specific fields for different types of data (resource pool indicators, coordination information, bandwidth part configurations). This segmentation allows efficient information exchange while maintaining manageable message structures and reducing processing complexity.
Solution Approach 2:
The patent uses parameter-based coordination where UEs exchange condensed information about resource pool parameters, bandwidth part configurations, and coordination conditions. By changing the representation from detailed resource descriptions to parameter indicators, the patent reduces signaling overhead while maintaining allocation efficiency.
3Reliability
If timer-based operations are implemented for resource management, then resource allocation reliability is improved, but processing time and device complexity increase
Solution Approach 1:
The patent implements timer-based mechanisms that are pre-configured with specific durations for different operations (resource selection, coordination response, retransmission). By establishing these time parameters in advance, the patent ensures reliable resource allocation without requiring complex real-time processing decisions, thus improving reliability while minimizing processing time loss.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may transmit, to a second UE, an inter-UE coordination (IUC) request, the IUC request indicating at least one of one or more sidelink carriers, one or more sidelink bandwidth parts (BWPs), or one or more sidelink resource pools. The first UE may receive, from the second UE, an IUC response that indicates at least one of one or more sidelink time domain resources associated with at least one of the one or more sidelink carriers, the one or more sidelink BWPs, or the one or more sidelink resource pools, or one or more sidelink frequency domain resources associated with at least one of the one or more sidelink carriers, the one or more sidelink BWPs, or the one or more sidelink resource pools. Numerous other aspects are described.