Triggering of transmission time interval bundling based on frequency selective channel quality information in a radio communication system

There is provided a method and corresponding network node for handling TTI bundling in a radio communication system. The method comprises the steps of obtaining (S1) frequency-selective channel quality information for at least one User Equipment (UE), and determining (S2) whether TTI bundling should be enabled or disabled for the UE(s) based on the frequency-selective channel quality information. By using frequency-selective channel quality information, more accurate decisions of whether TTI bundling should be enabled or disabled can be made, thus leading to more efficient resource utilization.