Network node and method for outer loop link adaption

A network node operable in a radio communication network for communication between the network node and a wireless device, the network node comprising:

• a processor;
• and
• a memory storing computer-executable instructions that, when executed by the processor, configure the network node to:
• obtain information associated with a channel quality of a channel between the network node and the wireless device;
• estimate one or more variables associated with the channel quality based on the obtained information;
• and
• determine an Outer Loop Link Adaptation (OLLA) adjustment based on the following:
• the obtained information associated with the channel quality;
• the estimated one or more variables associated with the channel quality;
• and
• when the obtained information indicates that the channel performance is acceptable, on a Sequential Hypothesis Testing (SHT) of the one or more variables against respective predefined intervals for the one or more variables, wherein:
• each predefined interval is defined by two end points, p0 and p1;
• and
• for each variable, the SHT evaluates the following two hypotheses:
• H0:
• variable≤p0;
• and
• H1:
• variable≥p1.