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Performance Analysis of Association Procedure in IEEE 802.11ah

Authors:
Pranesh Sthapit
Santosh Subedi
Goo-Rak Kwon
Jae-Young Pyun

Keywords: IEEE 802.11ah; association delay; Machine-to-Machine communication

Abstract:
IEEE 802.11ah is an emerging wireless local area network standard at sub 1 GHz license-exempt bands for cost-effective and large scale wireless networks. One of the most challenging issues in IEEE 802.11ah is supporting a large number of stations efficiently. To reduce heavy channel contention in IEEE 802.11ah networks, stations are divided into groups and each group of stations are allowed to access in only the designated channel access period. This grouping strategy enables fair channel access among the large number of stations. However, grouping strategy cannot improve channel usage efficiency at the time of network initialization. Therefore, during association, heavy contention results in longer association delay. Also, already associated stations can contend for data transmission. In this paper, authentication/association process is analyzed. Our analysis shows that the association process may take up to several minutes. Therefore, there is a need for a new mechanism to avoid collisions of authentication requests and traffic from already associated stations.

Pages: 70 to 73

Copyright: Copyright (c) IARIA, 2015

Publication date: November 15, 2015

Published in: conference

ISSN: 2163-9027

ISBN: 978-1-61208-439-8

Location: Barcelona, Spain

Dates: from November 15, 2015 to November 20, 2015