A study on MAC sublayer of OBU in ETC system

In order to achieve the core chip which has the advantages of low cost, low power consumption and high integration in electronic toll collection system, the implementation of medium access control (MAC) sublayer protocol of the dedicated short-range communication is studied. Based on the analysis of working principle of MAC sublayer, the MAC sublayer is divided into three modules. Finally, the working process of every modules are realized in Verilog HDL, and the simulation results show that they are in accordance with the protocol.