DocumentCode :
2947495
Title :
Experimental investigation of link layer adaptation in IEEE 802.11n WLANs
Author :
Al-Adhami, Mujahid ; Al-Dubai, Ahmed Y. ; Romdhani, Imed
Author_Institution :
Sch. of Inf., Univ. of Edinburgh, Edinburgh, UK
fYear :
2012
fDate :
18-20 April 2012
Firstpage :
1
Lastpage :
7
Abstract :
Due to its low cost wireless communication methodology and improvements in both its physical (PHY) and MAC (Link) layers, the IEEE 802.11n wireless LAN (WLAN) technology has been adopted widely. However, fairness of current 802.11n rate adaptation (RA) mechanisms and analysis of practical user end-to-end throughput are among important issues still in their infancy. Thus in this paper, we conduct an experimental investigation of adapting 802.11n MAC and PHY layer parameters in an indoor 3 × 3 MIMO testbed. We detail the deployment of our infrastructure mode testbed and compare the performance of 802.11n RA mechanisms under various conditions, including simultaneous transmissions and Co-Channel Interference (CCI). We then examine a range of elements affecting application performance including the number of spatial streams, packet length, frame aggregation subframe number and length. Favorable results are observed across a set of configurations and parameters, such as the increase in A-MPDU subframe length and its impact on end-to-end throughput. We believe our results demonstrate how overall application performance may be influenced by the Link layer; some of which may also be applicable to the upcoming 802.11ac IEEE standard.
Keywords :
cochannel interference; radiofrequency interconnections; wireless LAN; A-MPDU subframe length; CCI; IEEE 802.11n RA mechanisms; IEEE 802.11n WLAN; IEEE 802.11n rate adaptation mechanisms; IEEE 802.11n wireless local area network technology; MAC layer parameters; PHY layer parameters; cochannel interference; frame aggregation subframe number; infrastructure mode testbed; link layer adaptation; link layers; low cost wireless communication methodology; packet length; spatial streams; user end-to-end throughput analysis; Aggregates; Educational institutions; IEEE 802.11n Standard; Interference; MIMO; Throughput; Wireless communication;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Telecommunications Symposium (WTS), 2012
Conference_Location :
London
ISSN :
1934-5070
Print_ISBN :
978-1-4577-0579-3
Type :
conf
DOI :
10.1109/WTS.2012.6266144
Filename :
6266144
Link To Document :
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