Towards real-time middleware for vehicular ad hoc networks

Abstract

Applications of inter-vehicle and vehicle-to-roadside communication that make use of vehicular ad hoc networks (VANETs) will often require reliable communication that provides guaranteed real-time message propagation. This paper describes an event-based middleware, called RT-STEAM. Unlike other event systems, RT-STEAM does not rely on a centralized event broker or look-up service while still supporting event channels providing hard real-time event delivery. RT-STEAM event filtering can be based on subject, content and/or proximity. To guarantee real-time communication, we exploit proximitybased event propagation to guarantee real-time constraints within the defined proximities only. The proximity within which realtime guarantees are available is adapted to maintain time bounds while allowing changes to membership and topology, typical of VANETs. This Space-Elastic Model of real-time communication is the first to directly address adaptation in the space domain to guarantee real-time constraints.

Timed Broadcast via Off-the-Shelf WLAN Distributed Coordination Function for Safety-Critical Systems

“…When transmitting on a shared communication medium, with a possibly unbounded number of participating nodes and various procedures for channel access, timing faults have to be accepted. Executing critical distributed services and achieving the required reliability, safety and timeliness of the communication through portable and wireless devices in harsh environments requires the design of resilient services and networks [1], [2].…”

Inter-vehicular Communication Systems, Protocols and Middleware

“…These have been designed to respond to the dynamic nature of the environment they serve as well as fulfilling the need for real-time support for vehicle applications. An example of a middleware that provides real-time communication support is RT-STEAM [23]. RT-STEAM is an event-based middleware that provides guaranteed real-time message propagation for vehicular ad hoc networks.…”

Towards a Framework for Self-Adaptive Reliable Network Services in Highly-Uncertain Environments

“…Car2car and car2infrastructure networks (VANET, Vehicular ad-hoc networks [1]). Vehicles are expected to drive forward the use of wireless communications in mobile ad-hoc networks.…”