An adaptive alert message dissemination protocol for VANET to improve road safety

Fuzzy Logic for Multi-Hop Broadcast in Vehicular Ad Hoc Networks

“…Generally, a larger distance from the sender node results in a higher broadcast probability. Suriyapaiboonwattana et al (2009) have proposed a protocol which uses an adaptive wait time and adaptive probability to trigger the rebroadcast. Slavik & Mahgoub (2010) have proposed a protocol in which all nodes rebroadcast a received message with a certain probability.…”

Design and Evaluation of a Hybrid Intelligent Broadcast Algorithm for Alert Message Dissemination in VANETs

“…It will then give rise to broadcast storm, and collision will occur, which lead to retransmission and further collision. [4,5] tries to reduce the broadcast storm problem by using a stochastic selection method to decide the vehicles that will rebroadcast the alert message. When a vehicle receives a broadcast message for the first time, the vehicle will rebroadcast the alert message with a random probability p. This method will help to reduce number of re-broadcasting vehicles and thereby broadcast storm problem.…”

Improving Vehicular ad hoc Network Protocols to Support Safety Applications in Realistic Scenarios

“…Its major drawback is that it will cause the obtained results to be very optimistic, as we always consider that vehicles are in line-of-sight. A variation of this scheme is reducing the scenario to a simple highway where all the vehicles move in the same direction, like the one found in [SPC09] and [BSKW08].…”

“…The TLO approach was extended using a protocol which utilizes adaptive waitwindows and adaptive probability to transmit, named Adaptive Probability Alert Protocol (APAL) [SPC09]. This scheme shows even better performance than the TLO scheme, but it is also only validated in highway scenarios.…”

“…Regarding VANETs, previously proposed broadcast storm mitigation schemes have been only validated using simple scenarios such as a highway (several lanes, without junctions) [SP08,SPC09], or a Manhattan-style grid scenario [KEOO04].…”