Evaluation of Content Dissemination Strategies in Urban Vehicular Networks

Abstract

The main drivers for the continuous development of Vehicular ad-hoc Networks (VANETs) are safety applications and services. However, in recent years, new interests have emerged regarding the introduction of new applications and services for non-urgent content (e.g., videos, ads, sensing and touristic information) dissemination. However, there is a lack of real studies considering content dissemination strategies to understand when and to whom the content should be disseminated using real vehicular traces gathered from real vehicular networks. This work presents a realistic study of strategies for dissemination of non-urgent content with the main goal of improving content delivery as well as minimizing network congestion and resource usage. First, we perform an exhaustive network characterization. Then, several content strategies are specified and evaluated in different scenarios (city center and parking lot). All the obtained results show that there are two content distribution strategies that clearly set themselves apart due to their superior performance: Local Rarest Bundle First and Local Rarest Generation First.

EmuCD: An Emulator for Content Dissemination Protocols in Vehicular Networks

“…Finally, there is mOVERS [18], an emulator that is able to recreate scalable vehicular scenarios of data gathering and content dissemination by replicating the same software of the OBUs and integrating with real vehicular mobility and connectivity. This emulator has been previously used to test different routing and content dissemination strategies [18][19][20], but its main drawback, as most simulators/emulators, is the need for a custom implementation of the protocol within the code (rendering the testing of a closed-source protocol impossible).…”

Efficient Dissemination of Safety Messages in Vehicle Ad Hoc Network Environments

“…In particular, services are being implemented that provide users with safety messages to avoid road accidents and find less congested routes, thus reducing fuel consumption and air pollution. The most basic safety message dissemination scheme is based on broadcasts [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. However, broadcastbased message dissemination causes the broadcast storm phenomenon, which causes excessive transmission delay, packet loss, transmission failure, and dissemination interference, and degrades overall network performance.…”