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Efficient Mechanism to Exchange Relevant Messages in Vehicular Ad Hoc Networks

Rahim A., Kong H. Y., Sher M.

Przegląd Elektrotechniczny

2013

R. 89, nr 3a

98--102

Broadcast is the commonly used technique for data dissemination in VANETs .It requires unicast and multicast protocols for connectivity and maintenance of path. Broadcast has the problem of surplus data. In order to resolve it, we modify the” Hello” packet of Optimized Link State Routing Protocol (OLSR) and add a new parameter called preference list. It contains the interest of the vehicle and data which current vehicle has. Due to mobility, there is very short time available for data exchange and limited messages are only communicated according to neighbour preference. We evaluate the modified OLSR with the help of Network Simulator in VANETs scenario. So in this way, surplus data and network load is reduced.

W artykule przedstawiono zmodyfikowany protokół transmisji danych OLSR z dodatkiem tzw. listy preferencji, który wykorzystywano w sieci typu VANET. W związku z mobilnością elementów, możliwa jest tylko krótkoterminowa wymiana danych w ograniczony sposób, wysyłanie wiadomości. Proponowane rozwiązanie pozwala na redukcję danych nadwyżkowych i obciążenia sieci.

On the Optimal Design of a Broadcast Data Dissemination System over VANET Providing V2V and V2I Communications "The Vision of Rome as a Smart City"

Palma V., Vegni A. M.

Journal of Telecommunications and Information Technology

2013

nr 1

41-48

In different this paper we present the performance evaluation study of a simple broadcast data dissemination technique in new emerging Vehicular Ad hoc Networks (VANETs). Differently from the traditional Mobile Ad hoc NETworks (MANETs), VANETs require particular routing protocols, due to the high dynamism of the network topology, and to different traffic and mobility patterns. For safety and emergency message applications, broadcast data dissemination is an important key factor in VANETs. However, the design of optimal deployment of relay nodes in different network scenarios allows to enhance system performance. At this aim, this work analyzes vehicular network performances in terms of throughput and delays, for different traffic scenarios, exploiting both inter-vehicular communications, as well as the availability of fixed network infrastructure.