Fairness Access in the Ieee 802.11p-based Dual-radio/single-radio Vehicular Networks

In this paper, we develop an analytical model to discuss the unfairness problem related with dualradio/singleradiovehicle that exists in IEEE 802.11p-based vehicular networks. According to IEEE 1609.4 standard, dual-radiovehicle accesses continuously channel through control channel interval(CCHI) and service channel interval (SCHI),but single-radio vehicle only simultaneously accesses channel in SCHI. So there is the unfairness problem forchannel access between dual-radio vehicle and single-radio vehicle. Our aim is to find a solution to solve thisunfairness problem. The minimum contention window based on the access time to achieve the optimal fairness is adopted. The simulation results show our claims can be supported. Index Terms Dual/Single radio, Fairness index, Optimal contention window, Throughput.