Throughput Optimization of Multi-BSS IEEE 802.11 Networks with Universal Frequency Reuse

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

27 Scopus Citations
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Detail(s)

Original languageEnglish
Article number7932180
Pages (from-to)3399-3414
Journal / PublicationIEEE Transactions on Communications
Volume65
Issue number8
Online published19 May 2017
Publication statusPublished - Aug 2017

Abstract

For IEEE 802.11 networks with multiple basic service sets (BSSs), most studies have focused on how to allocate different frequency sub-channels to BSSs for minimizing the co-channel interference. With the significant increase of the subchannel bandwidth, however, it becomes increasingly important to study the network performance with universal frequency reuse. In this paper, we focus on an uplink M-BSS IEEE 802.11 network, where all the BSSs share the frequency band rather than operate at different sub-channels. By dividing the nodes in each BSS into multiple groups according to the set of access points (APs) they can be heard by, the steady-state points of M BSSs in saturated conditions are obtained as the functions of the number of nodes in each group and the initial backoff window size of nodes of each BSS. The maximum network throughput is further characterized by optimally choosing the initial backoff window sizes of all the nodes and shown to be closely dependent on the percentage of nodes that can be heard by multiple APs. The comparison with orthogonal frequency division reveals that although the maximum network throughput is degraded due to interference among BSSs, a higher network data rate can still be achieved by universal frequency reuse, which makes it a preferable option for multi-BSS IEEE 802.11 networks.

Research Area(s)

  • carrier sensing multiple access (CSMA), distributed coordination function (DCF), IEEE 80211 networks, multiple basic service sets (BSSs), throughput optimization, universal frequency reuse