O impacto de ataques RoQ em redes 802.11 com controle de potência de transmissão

• Urlan S. de Barros UFPR
• Tiago de C. Freire UFLA
• Michele N. Lima UPMC
• Luiz H. A. Correia UFLA
• Aldri L. dos Santos UFPR

DOI: https://doi.org/10.5753/sbseg.2009.20623

Abstract

IEEE 802.11 has two coordinator functions, called DCF and PCF, which are responsible for media access control. Transmition power control (TPC) has been employed to save power of devices and improve spatial reuse of the network. However, both 802.11 and TPC techniques are vulnerable to attacks that deny services, such as reduction of quality (RoQ) attacks, since they need that stations keep default transmission behavior. RoQ attacks intend to optimize the attack traffic to reach the maximum damage and avoid prevention or detection mechanisms. This work analyzes how RoQ attacks affect 802.11 and TPC techniques in relation to saving power and spatial reuse. We evaluate by simulation the impact of attacks considering three different TPC techniques: AEWMA, Atenuation and Basic Scheme. Results show higher saving power when using AEWMA technique, and that spatial reuse has been affected only in presence of 30% or more of misbehaving self-whiper RoQ attackers.

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