Improved Contention Based Forwarding for data broadcasting in VANETs

Studying and improving the performance of ETSI ITS contention-based forwarding (CBF) in urban and highway scenarios: S-FoT+

“…The broadcast address is used in contentionbased protocols as the destination link address, so once the first vehicle forwards the message (the contender with the lowest timer) the rest of the contenders inhibit their scheduled transmissions. This indiscriminate election of the next-forwarder candidates may lead to situations where the best forwarders are inhibited [27,28] giving as a result poor dissemination coverage.…”

“…In the past some works [31,32,28,33,34,27], including ours (see above and [10]), have discussed ETSI GeoNetworking protocols, particularly CBF as the area forwarding protocol, and proposed different solutions to overcome identified inefficiencies:…”

“…• Increase dissemination coverage: choosing the best forwarders. In [27], it is proposed to modify the ETSI CBF protocol to combine CBF (a receiver-based mechanism) with a sender-based approach where the current forwarder uses its neighbors' table and also includes in the packet a list of selected next forwarders, i.e., two vehicles spatially distributed around the current forwarder to cover a wider area. This approach tries to supplement the blind selection of forwarders that the ETSI CBF protocol does.…”

“…A relevant issue to highlight is that just a few works proposing enhancements to ETSI ITS CBF protocol have actually considered the complete ETSI ITS architecture in the experimental evaluation: [34,32] and ours (as described above and in [10]). In particular, it is common that these works [31,28,27] do not consider the DCC at the Access Layer, which may have a non-negligible impact on dense networks.…”

Data Dissemination in VANETs Using Particle Swarm Optimization

“…Accidents and delays in transportation have become inevitable due to the rapidly increasing number of cars, the over-saturation of the transportation infrastructure, and traffic congestion. VANET has been exhibited as a promising solution that can boost a driver’s awareness and provides vehicles with tremendous up-to-date information to prevent accidents and traffic congestion [ 4 ]. These systems allow for the construction of several applications that, by utilizing data shared across road agents, empower entities (such as drivers) to make more informed decisions, either manually or automatically [ 5 ].…”