Method for fast initialization of multicarrier system and point-to-multipoint transfer of multicarrier signal in digital subscriber line

A method for fast initialization in a discrete multi-tone (DMT) system for a digital subscriber line, the discrete multi-tone system having a transmitting part comprising a serial to parallel converter converting a serial input data that will be transmitted through the communication channel into a parallel data, a multicarrier modulator part encoding said parallel data by each sub-channel, and a multicarrier-modulating and a pre-transmit processing part for transmitting said modulated signal over the communication channel efficiently;

• and a receiving part comprising a post-receive processing part changing said signal inputted through a communication channel into the signal for modulating, a multicarrier demodulator part for demodulating the signal that has been passed through said post-receive processing part and a parallel to serial converter converting said demodulated signal into the original type of serial data, the method comprising the steps of:
• (a) performing activation and acknowledgement on a communication channel between a transmitting part and a receiving part;
• (b) transceiver training on a communication channel between the transmitting part and the receiving part;
• and
• (c) performing selective bit swapping algorithm on data from the communication channel, using a switch according to an installation status of said system to optimize the channel efficiency.