Opportunistic Spectrum Access for CR-VANETs: A Game-Theoretic Approach

Nan Cheng, Ning Zhang, Ning Lu, Xuemin Shen, Jon W. Mark, Fuqiang Liu
2014 IEEE Transactions on Vehicular Technology  
In this paper, we investigate the opportunistic spectrum access for cognitive radio vehicular ad hoc networks (CR-VANETs). The probability distribution of the channel availability is first derived by means of a finite-state continuous-time Markov chain (CTMC), jointly considering the mobility of vehicles, and the spatial distribution and the temporal channel usage pattern of primary transmitters. Utilizing the channel availability statistics, we propose a game theoretic spectrum access scheme
more » ... r vehicles to opportunistically access licensed channels in a distributed manner. Specifically, the spectrum access process is modeled as a non-cooperative congestion game. The existence of Nash equilibrium is proved and its efficiency is analyzed when employing uniform medium access control (MAC) protocol and slotted ALOHA, respectively. Furthermore, a spectrum access algorithm is devised to achieve a pure Nash equilibrium with high efficiency and fairness. Simulation results validate our analysis and demonstrate that the proposed spectrum access scheme can achieve higher utility and fairness, compared with a random access scheme.
doi:10.1109/tvt.2013.2274201 fatcat:iiuuovwzjnfbnfogaqr3zbopsu