A method performed in a radio network node for enabling management of radio resources in a radio communications network, which radio network node serves a first cell, the method comprising - measuring a received total power value at the radio network node in the first cell, - computing a factor indicating a load in the first cell, - estimating a noise floor level in the first cell, the method being characterised by further comprising - computing simultaneously a utilization probability value of the load in the first cell and a neighbour cell interference value in a non-linear interference model based on the measured received total power value, the computed factor, and the estimated noise floor level in the first cell, which neighbour cell interference value is an interference from at least one second cell affecting said first cell, which utilization probability value indicates probability of use of power granted in the first cell, and wherein the utilization probability value of the load in the first cell and the neighbour cell interference value are used for managing radio resources in the radio communications network, and computing the utilization probability value of the load in the first cell and the neighbour cell interference value is based on P RTWP t = 1 1 − L own t − T D p load t P neighbor t + P N t where t is a present time, P RTWP ( t) is the received total power value, T D is a delay, L own ( t - T D) is the factor of the load in the first cell at the present time reduced with the delay, p load ( t) is the utilization probability value of the load in the first cell, P neighbor ( t) is the neighbour cell interference value at the present time, P N ( t) is the noise floor level, from which a sum of the neighbour cell interference value at the present time P neighbor ( t) and the noise floor level P N ( t) is computed, the method further comprising transmitting the utilization probability value of the load in the first cell and the neighbour cell interference value to a controlling radio network node. - measuring a received total power value at the radio network node in the first cell, - computing a factor indicating a load in the first cell, - estimating a noise floor level in the first cell, the method being characterised by further comprising - computing simultaneously a utilization probability value of the load in the first cell and a neighbour cell interference value in a non-linear interference model based on the measured received total power value, the computed factor, and the estimated noise floor level in the first cell, which neighbour cell interference value is an interference from at least one second cell affecting said first cell, which utilization probability value indicates probability of use of power granted in the first cell, and wherein the utilization probability value of the load in the first cell and the neighbour cell interference value are used for managing radio resources in the radio communications network, and computing the utilization probability value of the load in the first cell and the neighbour cell interference value is based on P RTWP t = 1 1 − L own t − T D p load t P neighbor t + P N t where t is a present time, P RTWP ( t) is the received total power value, T D is a delay, L own ( t - T D) is the factor of the load in the first cell at the present time reduced with the delay, p load ( t) is the utilization probability value of the load in the first cell, P neighbor ( t) is the neighbour cell interference value at the present time, P N ( t) is the noise floor level, from which a sum of the neighbour cell interference value at the present time P neighbor ( t) and the noise floor level P N ( t) is computed, the method further comprising transmitting the utilization probability value of the load in the first cell and the neighbour cell interference value to a controlling radio network node. t is a present time, P RTWP ( t) is the received total power value, T D is a delay, L own ( t - T D) is the factor of the load in the first cell at the present time reduced with the delay, p load ( t) is the utilization probability value of the load in the first cell, P neighbor ( t) is the neighbour cell interference value at the present time, P N ( t) is the noise floor level, from which a sum of the neighbour cell interference value at the present time P neighbor ( t) and the noise floor level P N ( t) is computed, the method further comprising transmitting the utilization probability value of the load in the first cell and the neighbour cell interference value to a controlling radio network node.