This paper presents a qualitative and quantitative comparison of an enhanced version of the Multi-Hop Vehicular Broadcast protocol (EMHVB) and two others protocols: simple flooding and BCAST. In particular, they are evaluated in the context of vehicular communications, where MHVB was primarily conceived for ensuring active safety. MHVB is a flooding protocol indeed, but optimized for vehicular ad hoc networks (VANETs), so it efficiently disseminates information like positions and velocities of the vehicles for the sake of active safety applications. MHVB includes a 'Congestion detection algorithm', which suppresses unnecessary packets due to vehicular congested traffic, and a 'Backfire algorithm', which efficiently disseminates the packet through the network by selecting the adequate forwarder based on the distance from the original sender of the information. Dynamic Scheduling algorithm is introduced in EMHVB, which prioritizes the packet transmission based upon 'processing' of the received packets from the other vehicles. This saves the use of extra network resources and thus improving the performance of the protocol for longer distances. The simulations are done with the network simulator NS2 and the results obtained are shown. The paper concludes with some analysis derived from the simulation results.
Broadcast algorithms for active safety applications over vehicular ad-hoc networks
Funkalgorithmen für aktive, sicherheitstechnische Anwendungen im VANET
2001
5 Seiten, 10 Bilder, 9 Quellen
Aufsatz (Konferenz)
Englisch
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