Embodiments of the invention provide a method, system, etc. for automatic power saving mode insertion when an unknown or an offensive receiver detected in a wireless access system. A method comprises generating a look-up-table from AGWN payloads in a plurality of AGWN packets. The look-up-table is then transmitted from a transmitter to a receiver. Next, the method generates a coded packet from an AGWN packet in a data packet using the look-up-table, wherein a code from the look-up-table is substituted in place of the AGWN packet. Specifically, the substituting of the code from the look-up-table comprises substituting coded symbols representing AGWN payloads in the AGWN packets. Further, the generating of the look-up-table comprises generating the code to represent size and strength information regarding an AGWN, wherein the coded packet is generated with a size that is less than the data packet.