1. A method performed at a radio network node corresponding to a cell of interest in a wireless network, the method comprising: estimating a load utilization probability p load (t 1 ) based at least on a load utilization probability estimate {circumflex over (p)} load (t 0 ) and an interference-and-noise sum estimate {circumflex over (P)} other (t 0 )+{circumflex over (P)} N (t 0 ) applicable at a time t 0 to obtain a load utilization probability estimate {circumflex over (p)} load (t 1 ) applicable at a time t 1 , wherein t 1 −t 0 =T>0; estimating an interference-and-noise sum P other (t 1 )+P N (t 1 ) based at least on the load utilization probability estimate {circumflex over (p)} load (t 0 ) and the interference-and-noise sum estimate {circumflex over (P)} other (t 0 )+{circumflex over (P)} N (t 0 ) to obtain an interference-and-noise sum estimate {circumflex over (P)} other (t 1 )+{circumflex over (P)} N (t 1 ) applicable at the time t 1 ; and estimating an other cell interference P other (t 1 ) based at least on the interference-and-noise sum estimate {circumflex over (P)} other (t 1 )+{circumflex over (P)} N (t 1 ) and a thermal noise estimate {circumflex over (P)} N (t 1 ) to obtain an other cell interference estimate {circumflex over (P)} other (t 1 ) applicable at the time t 1 , wherein the load utilization probability p load (t) expresses a relationships between radio resource grants scheduled to one or more cell terminals and radio resource grants used by the same cell terminals applicable at a time t, each cell terminal being a wireless terminal in the cell of interest, and the load utilization probability estimate {circumflex over (p)} load (t) being an estimate thereof, wherein the interference-and-noise sum P other (t)+P N (t) expresses a sum of undesired signals, other than an own cell load P own (t), applicable at the time t, and the interference-and-noise sum estimate {circumflex over (P)} other (t)+{circumflex over (P)} N (t) being an estimate thereof, wherein the own cell load P own (t) expresses a sum of signals due to wireless activities in the cell of interest applicable at the time t, wherein the other cell interference P other (t) expresses a sum of interferences present in the cell of interest due to wireless activities applicable at the time t in one or more cells other than in the cell of interest, and the other cell interference estimate {circumflex over (P)} other (t) being an estimate thereof, and wherein a thermal noise P N (t) expresses a sum of undesired signals present in the cell of interest at the time t other than the own cell load P own (t) and other than the other cell interference P other (t) and the thermal noise estimate {circumflex over (P)} N (t) being an estimate thereof.