The invention concerns a fuel cell comprising an anode chamber, a cathode chamber and a cavity for the electrolytic space, as well as combustion gas supply conduits and carbon dioxide and water discharge conduits for the anode chamber, and, for the cathode chamber, oxygen and carbon dioxide supply conduits and discharge conduits for residual oxygen and residual carbon dioxide. Communication is executed between a micro-cell base station and a mobile terminal in the micro-cell, and between a spot-cell base station and the mobile terminal in the spot cell. A total concentration of the reactive components within the gas is less than 4. MS QDs are capped with thiol-containing charged molecules in a single step. A binary CAM array is segmented into a plurality of array groups, each of which includes a number of rows of binary CAM cells, a group global mask circuit, and a mask valid bit indicating whether the group global mask circuit stores a valid group global mask.