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RCFD: A Novel Channel Access Scheme for Full-Duplex Wireless Networks Based on Contention in Time and Frequency Domains

机译:RCFD:基于时域和频域竞争的全双工无线网络的新型信道访问方案

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摘要

In the last years, the advancements in signal processing and integrated circuits technology allowed several research groups to develop working prototypes of in–band full–duplex wireless systems. The introduction of such a revolutionary concept is promising in terms of increasing network performance, but at the same time poses several new challenges, especially at the MAC layer. Consequently, innovative channel access strategies are needed to exploit the opportunities provided by full–duplex while dealing with the increased complexity derived from its adoption. In this direction, this paper proposes RTS/CTS in the Frequency Domain (RCFD), a MAC layer scheme for full–duplex ad hoc wireless networks, based on the idea of time–frequency channel contention. According to this approach, different OFDM subcarriers are used to coordinate how nodes access the shared medium. The proposed scheme leads to efficient transmission scheduling with the result of avoiding collisions and exploiting full–duplex opportunities. The considerable performance improvements with respect to standard and state–of–the–art MAC protocols for wireless networks are highlighted through both theoretical analysis and network simulations.
机译:在过去的几年中,信号处理和集成电路技术的进步使几个研究小组能够开发出带内全双工无线系统的工作原型。就提高网络性能而言,引入这种革命性的概念很有前途,但同时也带来了一些新的挑战,尤其是在MAC层。因此,需要创新的信道访问策略来利用全双工提供的机会,同时应对由于采用全双工带来的日益复杂的问题。在这个方向上,本文基于时频信道竞争的概念,提出了频域中的RTS / CTS(RCFD),这是一种用于全双工ad hoc无线网络的MAC层方案。根据该方法,使用不同的OFDM子载波来协调节点如何访问共享介质。所提出的方案导致有效的传输调度,从而避免冲突并利用全双工机会。通过理论分析和网络仿真,都强调了无线网络的标准和最新的MAC协议的显着性能改进。

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