Differential successive relaying scheme for fast and reliable data delivery in vehicular ad hoc networks


The high-speed mobility of recent transportation worsens matters of unstable direct links and imprecise channel estimation, that poses challenges on quick and reliable data delivery in vehicular impromptu networks (VANETs). The goal of the proposed theme is to produce high-speed full-duplex relaying connectivity for unstable direct links, and reliable info detection while not precise channel state data (CSI) in VANETs. Within the proposed theme, full-duplex relaying connectivity is provided by differential successive relays (DSRs) at roadside or within different vehicles. To enhance robustness of DSR while not specific CSI, efficient blind interference cancellation is presented to mitigate inter-relay interference. Meanwhile, reliable information detection while not precise CSI is enabled by superposition coding with differential modulation. Furthermore, the benefits, applications of DSR and complexities for real-world implementation are mentioned, and the decision rule, bit error probability and ergodic capacity are theoretically obtained. Numerical results verify significant improvements within the performance of the proposed scheme compared with standard schemes with half-duplex relays and frequent channel estimation in VANETs.

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