Device and process for severing a material web. The entangled yarns are fused integrally with the elevated portions firmly due to existence of the elevated portions regardless of a certain thickness of the flat plate-like substrate. The second step includes the permainent storage and processing of the data in a computer. The memory and the computer program code are also configured to, with the processor, cause the apparatus to generate a message for a receiving communication node employing the communication resource, and select a transmitter power level for the message as a function of the reported interference characteristic and the reported weighting factor.