An Effective Suppression Method for 802.11 Transmission with Experimental Verification

Extensive, unmanaged IEEE 802.11 deployments may become sources of interference in emergency communications scenarios. In this paper, we consider the goal of protecting public safety by suppressing the transmission of 802.11. In order to develop a suppression method that can be effective in practice, we propose a new spoofing method which utilizes the channel detection mechanism in physical layer of 802.11 protocol. Besides, numerous experiments are conducted for commercial off-the-shelf (COTS) 802.11 devices (i.e. WiFi). Based on the experiment results, we finally present a reasonable and efficient method for preventing WiFi transmission. Further experiments and analysis show that the proposed method is superior to the state of the art suppression methods in terms of energy consumption and applicability to all 802.11 devices.