Receiving UE Resource Reservation for D2D Unicast Reliability

The patent inverts the traditional unilateral resource selection approach by allowing the receiving UE to determine and reserve communication resources for the transmitting UE. This inversion enables the receiving UE to select resources based on its own signal conditions and capabilities, thereby improving reception quality while maintaining relatively simple procedures through the use of preconfigured resource pools and standardized signaling mechanisms.

The patent applies the self-service principle by enabling the receiving UE to autonomously determine and reserve communication resources without requiring extensive sensing operations from the transmitting UE. The transmitting UE simply receives the resource reservation information from the receiving UE and uses the indicated resources, significantly reducing the energy consumption for UEs with limited capabilities while still achieving efficient resource allocation based on the receiving UE's channel conditions.

The patent applies universality by designing a resource reservation mechanism that can handle both unicast and multicast transmissions through a unified approach. The receiving UE determines appropriate resources based on the transmission type and communicates these resources to the transmitting UE using standardized signaling. This multi-functional design improves communication reliability for both unicast and multicast while avoiding the need for separate complex resource selection procedures for each transmission type.