Cisco :: Getting Alert In WCS 7.0.172.0 - DoS / CTS Flood

I have WCS 7.0.172.0 where as i have very frequent alert about DoS : CTS flood In channel 60, the system has detected 212 CTS frames in the last minute, which matches the traffic pattern of the form of denial-of-service attack, CTS (Clear-To-Send) attack. A wireless denial-of-service attacker may suspend the wireless media for communication by taking advantage of the privilege of CTS frame to reserve RF medium for transmission. By transmitting back to back CTS frames, an attacker can force other wireless devices sharing the RF medium to hold back its transmission until the attacker stops transmitting the CTS frames. The system detects the abuse of CTS frames for denial-of-service attack.