Sidelink PRS Grant Update for Re-Evaluation and Preemption

The patent implements a feedback mechanism where the first device receives re-evaluation indications and pre-emption indications regarding the first resource, removes the resource from the SL grant upon receiving these indications, and reselects a second resource from the transmitting resource pool. This closed-loop feedback system enables the autonomous allocation mechanism to respond to changing channel conditions and resource availability, thereby maintaining both flexibility and reliability.

The patent transforms the static autonomous resource allocation into a dynamic process by enabling real-time modification of the SL grant. The first device dynamically adjusts its resource selection based on received indications, removing the first resource and selecting a replacement second resource. This dynamic adaptation allows the system to maintain optimal performance under varying conditions while preserving the autonomous allocation advantage.

The patent implements self-service by having the first device autonomously perform resource re-evaluation and pre-emption based on indications received from the network or other devices. The first device independently removes the first resource from the SL grant and selects a replacement second resource without requiring complex centralized coordination, thereby achieving reliable resource management with minimal additional complexity.

The patent extracts the resource re-evaluation and pre-emption functionality from the complex resource management process, isolating it as a distinct mechanism that operates independently. By separating this function, the system can implement reliable resource monitoring and adjustment without burdening the entire device management architecture, thus improving reliability with controlled complexity increase.

The patent applies preliminary action by having the first device perform resource reslection in advance based on received indications before the actual transmission occurs. The device proactively removes the first resource and selects a replacement second resource from the transmitting resource pool, preparing the updated SL grant before transmission time. This advance preparation minimizes the impact on transmission scheduling while ensuring efficient resource utilization.

The patent implements a streamlined resource replacement process that skips unnecessary intermediate steps. Upon receiving re-evaluation or pre-emption indication, the system directly removes the first resource and selects a second resource without extensive verification or negotiation procedures. This expedited approach, while maintaining correctness through the indication-based trigger mechanism, reduces the time overhead associated with resource management.