Patent ID: 7512097

Claim:
A method for adapting first and second transmission parameters in a transmitting node of a data communication system to the current link quality of a data communication channel, the method comprising in the transmitting node the steps of: counting the number of successful transmissions, each successful transmission bases on a receipt of an acknowledgement; comparing the number of successful transmission against a threshold value; and in the event of achieving the number of successful transmissions with the threshold value and operating with the first and second transmission parameters in a predetermined parameter space, jointly adapting both of the first and second transmission parameters in dependence on a critical value that due to the current link quality corresponds to a temporarily unsupported rate and power value of one of the first and second transmission parameters, wherein said jointly adapting includes one of: supporting a highest possible data rate by increasing a data rate transmission until a maximum rate is found, and if said rate cannot be increased further, reducing said transmit power level; or, supporting a lowest possible transmit power level by decreasing a power transmission level until a power level can not be further reduced and to increase the transmit rate when the transmit power level can not be further decreased.