A method in a first network node (114, 214_1, 314_1; 120_1, 220_1, 320_1)for selecting a transport format among a plurality of available transport formats, TF i, TF i + 1' for communicating with a second network node (120_1, 220_1, 320_1; 114, 214_1, 314_1) via a wireless link (130, 230, 330), which transport formats are such that transport formats have a higher maximum capacity in an increasing order, the method comprises: - obtaining a quality indicator, a Channel Quality Indicator, CQI, or a Signal-to-Noise-Ratio, SNR, which quality indicator, CQI or SNR, indicates the current channel quality of the wireless link, - determining a throughput indicator, which throughput indicator, thp i, thp fCQI,i (q), indicates a throughput of at least a first transport format and a second transport format being available at said quality indicator, CQI or SNR, and which throughput indicator, thp i, thp fCQI,i (q), for each transport format, TF i, is calculated as: thp i CQI = ∫ SNR CQI thp i SNR p CQI SNR dSNR., or thp f CQI, i q = ∫ SNR q thp i SNR p q SNR f CQI q dSNR, wherein thp i is the throughput at a certain SNR when using a certain transport format or order i, TF i, SNR is the range of SNR distribution as a function of CQI, p CQI is the estimated probability distribution function for the SNR based on reported CQI values, SNR(q) is the range of SNR distribution as a function ofq, wherein q is a given CQI, p q is the estimated probability distribution function for the SNR for each CQI value, wherein q is a given CQI, and f CQI ( q) is the estimated probability function for the CQI at a transmission instance, wherein q is a given CQI, - finding a throughput optimal transport format, TF, TF(f CQI), that gives a maximum among the indicated throughputs of the at least first transport format and second transport format or that maximizes a weighted sum of the indicated throughputs of the at least first transport format and second transport format, - switching to the throughput optimal transport format, TF, TF(f CQI), - sending a notification to the second node, which notification indicates the switch to the throughput optimal transport format, TF, TF(f CQI). - obtaining a quality indicator, a Channel Quality Indicator, CQI, or a Signal-to-Noise-Ratio, SNR, which quality indicator, CQI or SNR, indicates the current channel quality of the wireless link, - determining a throughput indicator, which throughput indicator, thp i, thp fCQI,i (q), indicates a throughput of at least a first transport format and a second transport format being available at said quality indicator, CQI or SNR, and which throughput indicator, thp i, thp fCQI,i (q), for each transport format, TF i, is calculated as: thp i CQI = ∫ SNR CQI thp i SNR p CQI SNR dSNR., or thp f CQI, i q = ∫ SNR q thp i SNR p q SNR f CQI q dSNR, wherein thp i is the throughput at a certain SNR when using a certain transport format or order i, TF i, SNR is the range of SNR distribution as a function of CQI, p CQI is the estimated probability distribution function for the SNR based on reported CQI values, SNR(q) is the range of SNR distribution as a function ofq, wherein q is a given CQI, p q is the estimated probability distribution function for the SNR for each CQI value, wherein q is a given CQI, and f CQI ( q) is the estimated probability function for the CQI at a transmission instance, wherein q is a given CQI, thp i is the throughput at a certain SNR when using a certain transport format or order i, TF i, SNR is the range of SNR distribution as a function of CQI, p CQI is the estimated probability distribution function for the SNR based on reported CQI values, SNR(q) is the range of SNR distribution as a function ofq, wherein q is a given CQI, p q is the estimated probability distribution function for the SNR for each CQI value, wherein q is a given CQI, and f CQI ( q) is the estimated probability function for the CQI at a transmission instance, wherein q is a given CQI, - finding a throughput optimal transport format, TF, TF(f CQI), that gives a maximum among the indicated throughputs of the at least first transport format and second transport format or that maximizes a weighted sum of the indicated throughputs of the at least first transport format and second transport format, - switching to the throughput optimal transport format, TF, TF(f CQI), - sending a notification to the second node, which notification indicates the switch to the throughput optimal transport format, TF, TF(f CQI).