Patent ID: 6341145
Filing Date: 2002-01-22
Classification: H04L

Abstract:
A communication method for setting a transmission condition in a broadband radio communication system which conducts communication between first and second radio communication terminals on a plurality of narrowband channels obtained by dividing a broadband channel, said communication method comprising the steps of:setting a transmission condition of at least Dart of said narrowband channels in the first radio communication terminal; transmitting a wireless communication from the first radio communication terminal to the second radio communication terminal on the at least part of the narrowband channels for which the transmission condition has been set; measuring in said second radio communication terminal a line guality of each narrowband channel of the at least part of the narrowband channels upon receipt of said wireless communication from said first radio communication terminal; transmitting line quality information indicating the line quality of each narrowband channel of the at least part of the narrowband channels from said second radio communication terminal to said first radio communication terminal; and causing said setting step to be performed using a new transmission condition for each narrowband channel of the at least part of the narrowband channels based on said line quality information received from said second radio communication terminal, wherein said transmitting a wireless communication step comprises the step of: transmitting a test signal from said first radio communication terminal to said second radio communication terminal on another part of the narrowband channels other than the at least part of the narrowband channels, and wherein said measuring step comprises the step of: determining an error rate of each narrowband channel of the at least part of the narrowband channels based on an error rate in said test signal received from said first radio communication terminal.