  This paper addresses the critical challenge of supporting next-generation
ultra-reliable and low-latency communication (xURLLC) within integrated sensing
and communication (ISAC)-enabled vehicle-to-infrastructure (V2I) networks. We
incorporate channel evaluation and retransmission mechanisms for real-time
reliability enhancement. Using stochastic network calculus (SNC), we establish
a theoretical framework to derive upper bounds for the peak age of information
violation probability (PAVP) via characterized sensing and communication moment
generation functions (MGFs). By optimizing these bounds, we develop power
allocation schemes that significantly reduce the statistical PAVP of sensory
packets in such networks. Simulations validate our theoretical derivations and
demonstrate the effectiveness of our proposed schemes.
