A method for processing data in an optical network element is provided, wherein a multicarrier signal is linear pre-coded, and wherein the linear pre-coded signal is modulated. At least first and second optical signals are transmitted through the optical fiber, where the optical signals have been modulated with an RF signal in such a way that a predetermined relationship is produced between the RF signals modulated on the first and second optical signals. A second protocol agent communicates with a second protocol device according to a second protocol. If the prefetch request had already gained access through arbitration, the upgrade has no effect. The disclosed apparatus can have significant application in medicine, food industry, spectroscopy, material science and other various areas.