DPNVC: A novel density-based probability VANET caching framework built upon the NDN

<p dir="ltr">Vehicular Ad Hoc Networks (VANETs) are an important component of modern network systems, supporting applications such as real-time entertainment, traffic notifications, and emergency services. However, the highly dynamic and rapidly changing topology of VANETs presents serious challenges for conventional data retrieval mechanisms designed for Mobile Ad Hoc Networks (MANETs), resulting in degraded performance. To address this issue, a novel Density-Based Probability VANET Caching Framework Built Upon the Named Data Networking (NDN) was proposed, namely DPNVC. This original framework dynamically calculates caching probabilities based on local traffic density, enabling to adapt to frequent topology changes. Additionally, the NDN communication model is applied to effectively suppress redundant packet forwarding in VANET environments. Empirical simulation results show that DPNVC significantly enhances Quality of Service (QoS) in various scenarios, including urban, highway, and city settings. Compared to baseline methods, it reduces link load by up to 25 %, decreases data retrieval time by up to 30 %, and improves the local satisfaction ratio by up to 66 %. It also maintains a competitive one-hop hit ratio performance.</p>