A Scheduling Algorithm for Downloading Data from RSU Using Multicast Technique

Vehicular ad-hoc network (VANET) is a technology for building a robust ad-hoc network between mobile vehicles as well as, between vehicles and roadside unit (RSU). Data communication on the roads is becoming further interesting, as the number of vehicles equipped with computing technologies and wireless communication devices increase. In this paper we study the vehicle - RSU communication. It is noticeable that vehicles request various data from RSU but however urgent requests should have higher priority to be served. Some vehicles may ask for the same data, if we can postpone some requested data and multicast it before the deadlines, several requests may be served through a single multicast. We propose a scheduling algorithm to download data from RSU using multicast technique in order to serve multiple requests, regarding the priority of data. Simulation result indicates that method the proposed method can provide desirable performance and higher quality of service.