Per-Zone Resource Reuse for NR Sidelink Based Vulnerable Road User Protection

Benefiting from New Radio (NR) sidelink based Vehicle-to-Everything (V2X) communication, Vulnerable Road Users Protection (VRUP) can be further developed in intelligent transport systems. However, considering limited resources in the V2X network, the interference caused by resource collisions may restrict this development. This paper propose a spatial reuse scheme of frequency resources, namely the Per-Zone Resource Reuse (PZRR) scheme, for NR sidelink based VRUP enhancement. To efficiently characterize the VRUP behavior in the PZRR scheme, a stochastic geometry based theoretical framework is provided by carefully taking into account interference from multiple zones. With the help of this framework, the delivery probability of the VRUP message can be accurately described under various parameter settings. Furthermore, numerical results show that the VRUP message delivery probability can be significantly improved by properly tuning parameter settings.