What is disclosed is a method of operating a wireless access node, where the wireless access node provides a wireless communication service to wireless communication devices after registration. The method includes monitoring a wireless access channel of the wireless access node for registration attempts of the wireless communication devices during a first time period and detecting a threshold amount of noise occurring on the wireless access channel after the first time period. The method also includes, in response to detecting the threshold amount of noise, processing the first time period and data related to the threshold amount of noise to determine a second time period. The method also includes, in response to determining the second time period, monitoring the access channel for additional registration attempts of the wireless communication devices during the second time period.