Driverless Cars with Communication System Based On Multiple Access Protocols

Abstract

Road traffic accidents are perceived as a serious problem in societies and one of the main reasons of fatalities, disability and injuries that inflict humans all over the world. Most of the Vehicular Ad Hoc Networks (VANETs) supported safety applications mainly rely on transmitting safety messages either by the means of vehicles or Road-Side Units (RSUs), whether it is a periodical action or in the case of an unexpected event, such as detecting unsafe road condition or a hard brake cases. This paper presents a Time Division Multiple Access (TDMA) protocol and Code Division Multiple Access (CDMA) protocol, which are designed specifically for supporting high-priority safety applications in a VANET scenario. The scenario of a virtual city is simulated and various metrics for performance are evaluated, comprising protocol overheads, good network mode, and channel usage, fairness of protocol, potential transmission collision, and delay delivery of the safety message. It was found that these protocols far outweighs the current Medium Access Control (MAC) schemes, which involve significant limitations in supporting the application of VANET. The suggested protocols can be seen as a promising tool for MAC in VANETs, which is able to achieve various unconventional safety applications to boost the standards of public safety and enhance safety for passengers, pedestrians and drivers on the roads. The result of the communication system is concluded that the approach provides optimum communication performance for received packets, packets delivery ratio, totally dropped packets and average end to-end delay. The proposed scheme has a 94% packet delivery ratio in CDMA, 92% in TDMA and 82% than other cases.