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Recently, several working implementations of in--band full--duplex wirelesssystems have been presented, where the same node can transmit and receivesimultaneously in the same frequency band. The introduction of such apossibility at the physical layer could lead to improved performance but alsoposes several challenges at the MAC layer. In this paper, an innovativemechanism of channel contention in full--duplex OFDM wireless networks isproposed. This strategy is able to ensure efficient transmission schedulingwith the result of avoiding collisions and effectively exploiting full--duplexopportunities. As a consequence, considerable performance improvements areobserved with respect to standard and state--of--the--art MAC protocols forwireless networks, as highlighted by extensive simulations performed in ad hocwireless networks with varying number of nodes.

RCFD: A Frequency Based Channel Access Scheme for Full Duplex Wireless Networks