hi, all It is wired that my AP send the station a null-date packet. As i know that this packet could only been sent by the station. Under which case the AP will send out this type of packet? Thanks -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html