Apparatus, comprising set defining means adapted to define, without exchanging a message related to the defining with a second cell different from a first cell to which the apparatus belongs, a set of resources out of a first plurality of resources, wherein the resources are orthogonal radio resources; first controlling means adapted to control a transmitting means to simultaneously transmit a respective first radio signal for each resource on all resources of the set without exchanging a message related to the controlling of the transmitting means with the second cell,; interference estimating means adapted to estimate, without exchanging a message related to the estimating with the second cell, a respective estimated interference on each of the resources of the set when the respective first radio signals are transmitted simultaneously on all resources of the set; first selecting means adapted to select, without exchanging a message related to the selecting with the second cell, a first resource of the set if the estimated interference on the first resource exceeds a first predefined level; replacing means adapted to replace, in the set, the first resource by a second resource of the first plurality of resources not having been part of the set without exchanging a message related to the replacing with the second cell; first repetition controlling means adapted to control, upon a trigger, the first controlling means, the interference estimating means, the first selecting means, and the replacing means to perform in order each of the controlling and the estimating, the selecting, and the replacing, respectively, for a predefined time without exchanging a message related to the controlling of the first controlling means, the interference estimating means, the first selecting means, and the replacing means with the second cell. set defining means adapted to define, without exchanging a message related to the defining with a second cell different from a first cell to which the apparatus belongs, a set of resources out of a first plurality of resources, wherein the resources are orthogonal radio resources; first controlling means adapted to control a transmitting means to simultaneously transmit a respective first radio signal for each resource on all resources of the set without exchanging a message related to the controlling of the transmitting means with the second cell,; interference estimating means adapted to estimate, without exchanging a message related to the estimating with the second cell, a respective estimated interference on each of the resources of the set when the respective first radio signals are transmitted simultaneously on all resources of the set; first selecting means adapted to select, without exchanging a message related to the selecting with the second cell, a first resource of the set if the estimated interference on the first resource exceeds a first predefined level; replacing means adapted to replace, in the set, the first resource by a second resource of the first plurality of resources not having been part of the set without exchanging a message related to the replacing with the second cell; first repetition controlling means adapted to control, upon a trigger, the first controlling means, the interference estimating means, the first selecting means, and the replacing means to perform in order each of the controlling and the estimating, the selecting, and the replacing, respectively, for a predefined time without exchanging a message related to the controlling of the first controlling means, the interference estimating means, the first selecting means, and the replacing means with the second cell.