A hunting blind, a blind support, and a filtration unit for use on a tree with or without a tree stand. A client obtains a public address from a gateway for IPSec communication. A number of MSs in the set of MSs is less than a maximum allowable number of simultaneously scheduled MSs, and an amount of interference control information and a type of interference control information transmitted is based on the number of MSs in the set of MSs and the maximum allowable number of simultaneously scheduled MSs.