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 p̂ load ( t 0) and an interference-and-noise sum estimate P̂ other ( t 0) + P̂ N ( t 0) applicable at a time t 0 to obtain a load utilization probability estimate P̂ 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 p̂ load ( t 0) and the interference-and-noise sum estimate P̂ other ( t 0) + P̂ N ( t 0) to obtain an interference-and-noise sum estimate P̂ other ( t 1) + P̂ 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 P̂ other ( t 1) + P̂ N ( t 1) and a thermal noise estimate P̂ N ( t 1) to obtain an other cell interference estimate P̂ 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 p̂ 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 P̂ other ( t)+ P̂ 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 P̂ 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 P̂ N ( t) being an estimate thereof. estimating a load utilization probability p load ( t 1) based at least on a load utilization probability estimate p̂ load ( t 0) and an interference-and-noise sum estimate P̂ other ( t 0) + P̂ N ( t 0) applicable at a time t 0 to obtain a load utilization probability estimate P̂ 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 p̂ load ( t 0) and the interference-and-noise sum estimate P̂ other ( t 0) + P̂ N ( t 0) to obtain an interference-and-noise sum estimate P̂ other ( t 1) + P̂ 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 P̂ other ( t 1) + P̂ N ( t 1) and a thermal noise estimate P̂ N ( t 1) to obtain an other cell interference estimate P̂ other ( t 1) applicable at the time t 1,