Inter-UE Coordination Feedback for NR V2X Collision Resolution

The patent implements inter-UE coordination feedback mechanisms where receiving UEs send feedback information to transmitting UEs about detected collisions or interference. This feedback loop enables transmitting UEs to adjust their resource selection dynamically, improving reliability while maintaining relatively simple autonomous operation. The feedback includes collision indicators and resource quality information that guide resource selection without requiring complex centralized control.

The patent introduces coordination signaling as an intermediary mechanism between UEs. Instead of direct complex autonomous decision-making leading to collisions, the coordination signaling acts as a mediator that exchanges resource availability and collision information between UEs. This intermediary layer enables cooperative resource selection, reducing collisions while keeping individual UE complexity low.

The patent segments the coordination feedback mechanism into distinct functional components: collision detection, feedback generation, feedback transmission, and resource adjustment. Each component handles a specific aspect of the coordination process, making the overall complex system manageable through modular design. The feedback signaling is also segmented into different types (e.g., collision indicators, resource recommendations) that can be processed independently.

The patent implements partial coordination feedback where UEs exchange only the necessary collision and resource information rather than complete system state information. This partial action approach provides sufficient reliability improvement through selective feedback while limiting the complexity increase by avoiding excessive signaling. The feedback is triggered only when collisions or interference are detected, not continuously.

The patent implements preliminary resource sensing and coordination before actual transmission. UEs perform sensing and exchange coordination feedback in advance to identify suitable resources, preventing collisions before they occur. This preliminary action reduces the need for retransmissions and conflict resolution later, ultimately saving time despite the initial sensing overhead. Resource reservations are made in advance based on coordinated information.

The patent enables UEs to skip extensive coordination procedures when no collisions are detected or when resource availability is clearly determined. The coordination mechanism is designed to allow rapid resource selection in favorable conditions by skipping unnecessary feedback exchanges, thus reducing time loss while maintaining reliability when needed.