Frequency-domain contention is a new paradigm of contention that has been proposed to enhance the performance of OFDM wireless networks. In this paper, we demonstrate how frequency-domain contention schemes would fail in a wireless local area network (WLAN) due to the existence of nodes that are hidden from each other. In addition, we propose a new MAC protocol, which is called EFDC (enhanced frequency-domain contention), that solves the failure problem without sacrificing performance in a WLAN. Simulation is used to evaluate and compare EFDC to the T2F (time-to-frequency) protocol and IEEE 802.11 contention method. The results show that EFDC achieves higher performance in terms of throughput and delay.

频域竞争是一种新的竞争范式，已被提出来增强OFDM无线网络的性能。在本文中，我们演示了由于存在彼此隐藏的节点，频域竞争方案在无线局域网（WLAN）中将如何失败。此外，我们提出了一种新的MAC协议，称为EFDC（增强的频域竞争），它可以解决故障问题而又不牺牲WLAN的性能。仿真用于评估EFDC并将其与T2F（时间频率）协议和IEEE 802.11竞争方法进行比较。结果表明，EFDC在吞吐量和延迟方面实现了更高的性能。