Safety in Vehicular Networks—On the Inevitability of Short-Range Directional Communications

Abstract : Safety implies high dependability and strict timeliness under worst-case conditions. These requirements are not met with existing standards aimed at inter-vehicular communications (V2V) in vehicular networks. Ongoing research targets medium-range omnidirectional V2V communications and short-range directional communications, which we refer to as neighbor-to-neighbor (N2N) communications. Focusing on the latter, we investigate the time-bounded message dissemination (TBMD) problem as it arises in platoons and ad hoc vehicle strings, referred to as cohorts. Informal specifications of TBMD, of a solution, are given. We show how to guarantee cohort-wide dissemination of any N2N message generated by a cohort member, either spontaneously or upon receipt of a V2V message. Dissemination time bounds are given for worst-case conditions regarding N2N channel contention and N2N message losses. These results add to previously demonstrated merits of short-range directional communications as regards safety in vehicular networks.
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Submitted on : Friday, July 10, 2015 - 12:06:42 PM
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Gérard Le Lann. Safety in Vehicular Networks—On the Inevitability of Short-Range Directional Communications. 14th International Conference ADHOC-NOW, 2015, Jun 2015, Athens, Greece. 14 p., ⟨10.1007/978-3-319-19662-6_24⟩. ⟨hal-01172595⟩

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