An efficient data circulation and discovery scheme in VANETs using public transportation systems

Due to recent development in wireless communication networks, researches in Vehicular Ad-hoc Networks (VANETs) have been getting much attention on information sharing and service discovery. However, due to the ever-shifting mobility of vehicle topology, vehicles moving in non-fixed routes may not find suitable next-hop vehicles to pass the data. This paper proposes schemes to effectively circulate and discover service information with the aid of public transportation systems. Bus routes can be used to create a backbone structure and data can be posted and circulated on the structure to avoid the broadcast storm problem. Moreover, by adopting the proposed architecture, the required data can be effectively disseminated and discovered through the traffic infrastructure and mobile vehicles. The experiment results demonstrate that our scheme outperforms other schemes in terms of packet delivery ratio and end-to-end delay. Moreover, the overhead of our scheme outperforms other scheme with an increasing of number of service requests.