Abstract
In this article, we propose an Opportunistic information dissemination protocol by mixing both flooding and an enhanced DHVN (Dissemination protocol for heterogeneous Cooperative Vehicular Network) protocol, allowing them to run opportunistically in a Manhattan plan. Special additional logic is added to the existing version of DHVN protocol in order to efficiently disseminate information in two steps: 1) by adding three tags, Initial Diffusion, Standard DHVN and DHVN Near Intersection; the Initial Diffusion tag is used for the first flooding transmission only and 2) by changing the SNF (Store and Forward) period by making it adaptive depending on the region. Detailed simulation results show that our opportunistic protocol outperforms the DHVN protocol by analyzing its performances using an integrated framework VNS.
Highlights
In recent years, the dissemination of data in VANET (Vehicular Ad hoc NETworks) has attracted a lot of attention given its imminent role in improving road safety and reducing traffic congestion
In this work we studied a palate of the VANET information dissemination protocols that we classified into three major classes, Relayed Instantaneous Broadcast, broadcast with storeand-forward SNF relay, and opportunistic broadcast
We underlined the performance of a recently introduced algorithm in [3], which is the DHVN protocol. We consider the latter to be a very good representative of the second class of dissemination protocols and we chose it as a basis for a new enhanced opportunistic dissemination protocol, the oDHVN
Summary
The dissemination of data in VANET (Vehicular Ad hoc NETworks) has attracted a lot of attention given its imminent role in improving road safety and reducing traffic congestion. The way in which relevant information is broadcasted throughout the vehicle environment is considered as a most important aspect for the vehicles cooperation in VANETs. several problems can occur during this process of dissemination: (1) an excessive consumption of bandwidth in the case where we are confronted to an urban area. Several problems can occur during this process of dissemination: (1) an excessive consumption of bandwidth in the case where we are confronted to an urban area. (2) A disconnected network problem can occur in the case of a rural area These problems constitute a crucial challenge and the question that will arise to face them is “what can we do to overcome the rural disconnection without excessive use of bandwidth and how can we avoid broadcast storms while keeping a high coverage ratio?”
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