  Widely deployed wireless network devices use a shared medium to communicate
among mobile nodes. WLAN uses virtual carrier sensing mechanism to solve issues
like hidden node problem, while this mechanism is vulnerable to DOS attacks
e.g., RTS attack. This paper discusses RTS (Request to Send) attack where
malicious nodes reserve the medium unnecessarily for overdue period of time.
The effects of such attacks on performance of WLAN are observed, proposed a
mitigation technique to restore network performance and analyzed the
improvement in performance.
