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

TL;DR

This paper introduces RCFD, a novel frequency-based channel access scheme for full-duplex wireless networks that enhances transmission efficiency and reduces collisions, leading to significant performance improvements over existing MAC protocols.

Contribution

It proposes an innovative contention mechanism for full-duplex OFDM networks that optimizes scheduling and exploits full-duplex capabilities effectively.

Findings

Significant performance gains over standard MAC protocols

Effective collision avoidance in full-duplex networks

Improved transmission scheduling efficiency

Abstract

Recently, several working implementations of in--band full--duplex wireless systems have been presented, where the same node can transmit and receive simultaneously in the same frequency band. The introduction of such a possibility at the physical layer could lead to improved performance but also poses several challenges at the MAC layer. In this paper, an innovative mechanism of channel contention in full--duplex OFDM wireless networks is proposed. This strategy is able to ensure efficient transmission scheduling with the result of avoiding collisions and effectively exploiting full--duplex opportunities. As a consequence, considerable performance improvements are observed with respect to standard and state--of--the--art MAC protocols for wireless networks, as highlighted by extensive simulations performed in ad hoc wireless networks with varying number of nodes.