The invention relates to a method for producing a packing structure, characterized in that it includes the following main steps: a) a step comprising the hydrothermal synthesis of the packing mass, performed using a mixture of quicklime and silica; and b) a step comprising the drying of the packing mass produced in step at a temperature T2 of between 110\xb0 C. The apparatus includes a unit which detects a carrier of another wireless communication system that is predetermined, and a unit which excludes a frequency channel of the plurality of frequency channels in which the carrier of the wireless communication system is detected, from frequency channels targeted for the frequency hopping. Inter-pulse duty cycling may be employed to reduce the power consumption of a device.