Method for regulation of the transmission power of a first radio station in a mobile radio system using a timeslot method, with a radio link existing between the first radio station and at least one second radio station, in which radio signals are interchanged on radio channels (11, 12, 14), and with the quality of the radio link being determined from the received signals in the at least one second radio station, and with commands to adjust the transmission power being sent from the at least one second radio station to the first radio station as a function of the determined quality, wherein the radio signals are spread using mutually orthogonal codes and the radio channels (11, 12, 14) are configured as timeslots of a frame, wherein it is stipulated for the radio link which code is used in which of the timeslots within which frame, and wherein the quality of the radio link is determined in the second radio station according to the following priority: - if the received timeslot is provided for the downlink from the first radio station to the at least one second radio station, the signal is received by the at least one second radio station in the received timeslot and the quality of the radio link is determined on the basis of a signal-to-interference ratio of said signal, - if the received timeslot is not provided for the downlink from the first radio station to the at least one second radio station and signals are received by the at least one second radio station in a timeslot that is reserved for the transmission from the first radio station to a different second radio station in the radio cell, then the quality of the radio link is determined by the at least one second radio station on the basis of a signal-to-interference ratio of said received signals; - if the received timeslot is not provided for the downlink from the first radio station to the at least one second radio station and no signals are received by the at least one second radio station in a timeslot that is reserved for the transmission from the first radio station to a different second radio station in the radio cell, then the quality of the radio link is determined by the at least one second radio station on the basis of an attenuation in the received timeslot of a physical common control channel defined according to the 3GPP TSG RAN TS 25.221 V3.0.0 standard. - if the received timeslot is provided for the downlink from the first radio station to the at least one second radio station, the signal is received by the at least one second radio station in the received timeslot and the quality of the radio link is determined on the basis of a signal-to-interference ratio of said signal, - if the received timeslot is not provided for the downlink from the first radio station to the at least one second radio station and signals are received by the at least one second radio station in a timeslot that is reserved for the transmission from the first radio station to a different second radio station in the radio cell, then the quality of the radio link is determined by the at least one second radio station on the basis of a signal-to-interference ratio of said received signals; - if the received timeslot is not provided for the downlink from the first radio station to the at least one second radio station and no signals are received by the at least one second radio station in a timeslot that is reserved for the transmission from the first radio station to a different second radio station in the radio cell, then the quality of the radio link is determined by the at least one second radio station on the basis of an attenuation in the received timeslot of a physical common control channel defined according to the 3GPP TSG RAN TS 25.221 V3.0.0 standard.