Abstract: Disclosed is a method for controlling interference signals by a base station in a wireless mobile communication system, the method including classifying a plurality of mobile stations into first and second mobile station groups including the mobile stations having good channel conditions and the mobile stations having poor channel conditions, respectively; and setting first and second thresholds for controlling interferences of the mobile stations belonging to the first mobile station group, adjusting downward an Modulation and Coding Scheme (MCS) level for the mobile stations having Rise over Thermal (RoT) values higher than the first thresholds, and adjusting downward the maximum allowable MCS level for the mobile stations having RoT values lower than the second threshold.

Abstract: An uplink scheduling system and method in a wireless broadband internet communication system includes calculating priorities of mobile stations (MSs) taking into account headroom size indicating transmission power additionally available for each of the MSs; and determining a transmission format of an MS selected to be preferentially allocated a slot as a result of the priority calculation, taking into account headroom size reported by the selected MS and a margin determined depending on a variation in channel state between the selected MS and a base station (BS).