Survey on OFDMA based MAC protocols for the next generation WLAN
Survey on OFDMA based MAC protocols for the next generation WLAN
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DOI：
10.1109/wcncw.2015.7122542
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发表时间：
2015-03
期刊：
影响因子：
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通讯作者：
Bo Li;Qiao Qu;Zhongjiang Yan;Mao Yang
中科院分区：
文献类型：
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作者：
Bo Li;Qiao Qu;Zhongjiang Yan;Mao Yang
自1999年以来的15年里，无线局域网（WLAN）的物理（PHY）层峰值速率几乎呈指数级提高。然而，事实证明，在当前的WLAN规范中，吞吐量与PHY峰值速率相比非常低，并且媒体访问控制（MAC）效率非常低，尤其是在密集部署场景中。因此，为了实现高MAC效率，IEEE标准协会标准委员会（IEEE-SA）于2014年3月批准了IEEE 802.11ax，为下一代WLAN制定了全新的修正案。正交频分多址 (OFDMA) 是提高 MAC 效率的一项有前途的技术。在本文中，我们首先研究了文献中现有的基于 OFDMA 的 MAC 协议。然后，提出了一种基于OFDMA的下一代WLAN MAC协议框架。最后，根据提出的设计问题对本文列出的所有现有的基于 OFDMA 的 MAC 协议进行了比较。据我们所知，本文是第一篇针对下一代 WLAN 基于 OFDMA 的 MAC 协议的调查。
The physical (PHY) layer peak rate of the wireless local area network (WLAN) has been almost exponentially improved over the past 15 years since 1999. However, it is proved that the throughput is very low comparing to the PHY peak rate, and the media access control (MAC) efficiency is very low in the current WLANs specification, especially in dense deployment scenarios. Therefore, to achieve high MAC efficiency the IEEE Standards Association Standards Board (IEEE-SA) approves IEEE 802.11ax in March 2014, to draw up a brand new amendment for the next generation WLAN. One of the promising technologies to improve MAC efficiency is Orthogonal Frequency Division Multiple Access (OFDMA). In this paper, we firstly investigate the existing OFDMA based MAC protocols in the literature. Then, a framework of OFDMA based MAC protocol for the next generation WLAN is proposed. Finally, all of the existing OFDMA based MAC protocols listed in this paper are compared according to the proposed design issues. To the best of our knowledge this paper is the first survey focusing on OFDMA based MAC protocols for the next generation WLAN.