Method and apparatus for congestion control in a wireless communication system. A heat source for the carbonizing is achieved by a direct combustion reaction between external combustible gas and external oxygen in a carbonization furnace. The proportional magnet is an assembly of a magnet core, a magnet armature and a magnet coil, whereby the proportional magnet when in its range of operation possesses a nearly constant magnetic strength. The first local communication unit further transmits the unique information to the server device. At the same time, the original information is transmitted in accordance with the transmission mode of its own apparatus, the encoding method determined based on the reception capability of a facsimile apparatus at a reception destination, and the receiving-side output original size and resolution. This is accomplished by continually optimizing the features, qualifiers, cases, and operators of the fuzzy rules.