Challenges and Solutions for Service Continuity in Inter-PLMN Handover for Vehicular Applications

The reliability and availability of network connectivity, which significantly varies with mobility, is crucial in Connected, Cooperative Automated Mobility (CCAM). Handover roaming are the most challenging situations terms connectivity cellular networks, require switching across cells same or between Public Land Mobile Networks (PLMNs). This paper proposes a set solutions for vehicular applications to mitigate impact mobility service continuity, including dual modem solution that reduces interruption time when PLMNs, an adaptive bitrate mechanism media streaming increases reliability, WebRTC server acting as gateway sessions vehicles, MEC discovery handover method. proposed have been evaluated executing Extended Sensors application several commercial experimental 5G Non-Standalone (NSA) Stand Alone (SA) setups different Multi-access Edge Computing (MEC), edge-cloud cloud infrastructures host services. It can be concluded from results obtained networks not yet achieved required performance CCAM, practitioners need implement workarounds, such ones this work, issues. As lessons learnt deployment experimentation, also overviews detailed problems CCAM industry stakeholders consider.