Patent ID: 6714520
Filing Date: 2004-03-30
Classification: H04L

Abstract:
A system for multi-carrier transmission which implements data transmission using the multi-carrier between a first communication equipment and a second communication equipment interactively under the noise environment that the changing timing of noise level is known, wherein:said first communication equipment switches bit rates of the data transmission using a first frequency band corresponding to the changing timing of noise level and comprises a first transmitting means for transmitting the data to said second communication equipment, said second communication equipment switches bit rates of the data transmission using a second frequency band corresponding to the changing timing of noise level and comprises a second transmitting means for transmitting the data to said first communication equipment, said system for multi-carrier transmission makes the bit rate with which said second transmitting means implements the data transmission of a second direction from said second communication equipment to said first communication equipment using said second frequency band higher than the bit rate with which said first transmitting means implements the data transmission of the first direction from said first communication equipment to said second communication equipment using said first frequency band, during the period that the noise generated at the data transmission of said first direction from said first communication equipment to said second communication equipment is large.