Qos-aware radio access technology (RAT)selection in hybrid vehicular networks

Abstract

The increasing number of wireless communication technologies and standards bring immense opportunities and challenges to provide seamless connectivity in HybridVehicular Networks (HVNs). HVNs could not only enhance existing applications but could also spur an array of new services. However, due to sheer number of use cases and applications with diverse and stringent QoS performance requirements it is very critical to efficiently decide on which radio access technology (RAT) to select. In this paper a QoS-awareRATselection algorithm is proposed for HVN.The proposed algorithmswitches between IEEE802.11p based ad hoc network and LTE cellular network by considering network load and application's QoS requirements. The simulation-based studies show that the proposed RAT selectionmechanism results in lower number ofVerticalHandovers (VHOs) and significant performance improvements in terms of packet delivery ratio, latency and application-level throughput.