The disclosure is related to a method of adaptive call admission control in a base station. When a call access request is received from a user equipment determination may be made as to whether an available call admission capacity of the base station reaches a first limit. When the available call admission capacity of the base station reaches the first limit determination may be made as to whether the received call access request is for a preferred call. Then, determination may be made as to whether a reserved call admission capacity reaches a second limit when the received call access request is for the preferred call. When the reserved call admission capacity has not reached a second limit, access of the user equipment associated with the received call access request may be allowed.