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Title: Scaling properties of IEEE 802.11 wireless networks
Authors: Papadopoulos, Fragkiskos 
Psounis, Konstantinos
Keywords: IEEE 802.11 networks | Performance-preserving scaling laws
Category: Electrical Engineering - Electronic Engineering - Information Engineering
Field: Engineering and Technology
Issue Date: 23-Sep-2008
Source: WiOpt 2008 : 6th International Conference on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks
Conference: WiOpt: Modeling and Optimization in Mobile, Ad-Hoc and Wireless Networks 
Abstract: We consider a single-hop wireless network consisting of α·N sources, where α ≥ 1 is a scaling factor. These sources are randomly distributed around a single base-station/access-point and utilize the IEEE 802.11 standard for medium access control. The transmission speed of each node C, the minimum contention window CWmin, and the maximum contention window CWmax, are all multiplied by the scaling factor α. Further, all protocol time-intervals are multiplied by 1/α. We show that as the scaling factor α increases, the packet delays become independent of α, and therefore, of the number of sources (α·N) sharing the wireless channel. At the same time, the user's perceived throughput and drop ratio remain almost invariant. This result is not only of theoretical interest, but also of great practical interest, as it clearly identifies the set of the system's parameters that we should aim to (simultaneously) scale in future versions of the IEEE 802.11 protocol (or in new protocols that utilize similar ideas), so that the system can support a very large number of users, while continuing to deliver to each user at least as good performance as before.
ISBN: 9789639799189
DOI: 10.1109/WIOPT.2008.4586060
Type: Conference Papers
Appears in Collections:Δημοσιεύσεις σε συνέδρια/Conference papers

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