PERFORMANCE EVALUATION OF ROUTING PROTOCOLS IN VEHICULAR AD HOC NETWORKS.

Vehicular Ad Hoc Networks (VANETs) are a new communication paradigm that enables the communication between vehicles moving at high speeds on the roads. This has opened doors to develop several new applications like traffic engineering, traffic management, dissemination of emergency information to avoid hazardous situations and other user applications. VANETs are direct offshoot of Mobile Ad Hoc Networks (MANETs) but with distinguishing characteristics like movement at high speeds, constrained mobility, sufficient storage and processing power, unpredictable node density and difficult communication environment with short link lifetime. Internet Engineering Task Force (IETF) is developing Dynamic MANET On-demand (DYMO) routing protocol which is successor to the popular Dynamic Source Routing (DSR) and Ad Hoc On-demand Distance Vector (AODV) routing protocols and shares many of its benefits. Performance evaluation of DYMO has been carried out in VANET scenarios and contrasted with traditional DSR and AODV. Results demonstrate the merits of DYMO under intense network conditions and the packet delivery fraction can be improved by as much as 30% when compared with the competing schemes. [ABSTRACT FROM AUTHOR]