Performance Evaluation of the Slotted ALOHA/DS-CDMA Inter-Vehicle Communication Scheme comparing with the CSMA/OFDM scheme

摘要

The inter-vehicle communication (IVC) systems based on CSMA/OFDM scheme such as theARIB STD-T109 in Japan are widely developed since autonomous distributed networks areeasily made by using the CSMA/CA MAC protocol. However, the performance is frequentlydeteriorated by the hidden terminals in CSMA/CA networks. The IVC system using theCDMA scheme is expected to mitigate the hidden terminal problem because simultaneouscommunication is possible between multiple users. In this paper, performances of theDS-CDMA IVC scheme using Slotted ALOHA MAC protocol are evaluated and comparedwith the OFDM IVC scheme using the CSMA/CA MAC protocol. As the results of simulation,it was confirmed that the PER (Packet Error Rate) performances of the SlottedALOHA/DS-CDMA scheme with the successive interference cancellation can be made betterthan the CSMA/OFDM.