文章基本信息

标题：A Phy/Mac Layer Mechanism to Improve Aggregation in WLANs
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作者：Anjaly Kurian ; Gnana Sheela K
期刊名称：International Journal of Computer Science and Network
印刷版ISSN：2277-5420
出版年度：2016
卷号：5
期号：1
页码：66-70
出版社：IJCSN publisher
摘要：In recent years, the growth of WLANs (Wireless Local Area Networks) is very high and it has become the common means of access to the internet. The proliferation of Wi-Fi based WLANs/Wi-Fi hotspots in public places enables ubiquitous internet access. The public places are referred to as large audience environments, in which each Wi-Fi access point (AP) normally serves a crowd of mobile stations (STAs) simultaneously. The performance of those Wi-Fi hotspots is extremely poor in terms of low throughput and severe delay. After carefully investigating the traffic characteristics in Wi-Fi hotspots the studies shows that the main causes of such poor performance are media access control (MAC) inefficiency and downlink-uplink traffic asymmetry. To cope with these issues, the key idea is pooling, which facilitates, an access point (AP) to pool frames for multiple STAs in a single transmission. It reduces contention overhead in downlink transmission and conveys more frames in each channel access. As such, each downlink transmission carries more payloads for multiple receivers, it enables in time response for multiple STAs concurrently in a single transmission and thus improves MAC efficiency and solves traffic asymmetry simultaneously
关键词：MAC Efficiency;Frame Aggregation;Contention Reduction;Pooling;Wi-Fi;IEEE 802.11;WLAN