Method of controlling transmission power in a mobile radio system

A mobile radio system in which a power control algorithm controls transmission power as a function of a transmission quality target value, said mobile radio system comprising:

• means for, in the event of a target value variation applied to compensate for the effects of a compressed transmission mode in which transmission is interrupted during transmission gaps and the bit rate is increased correspondingly to compensate for the transmission gaps, wherein said target value variation includes a first component for compensating for the effects of said increased bit rate and a second component for compensating for other effects of transmission gaps, obtaining an approximate value of said target value variation, by approximation of said second component, and
• means for anticipatorily varying the transmission power by an amount corresponding to said approximate value of said target value variation.

A base station in which a power control algorithm controls a downlink transmission power as a function of a transmission quality target value, said base station comprising:

• means for, in the event of a target value variation applied to compensate for the effects of a compressed transmission mode in which transmission is interrupted during transmission gaps and the bit rate is increased correspondingly to compensate for the transmission gaps, wherein said target value variation includes a first component for compensating for the effects of said increased bit rate and a second component for compensating for other effects of transmission gaps, obtaining an approximate value of said target value variation, by approximation of said second component, and
• means for anticipatorily varying the transmission power by an amount corresponding to said approximate value of said target value variation.

A mobile station in which a power control algorithm controls an uplink transmission power as a function of a transmission quality target value, said mobile station comprising:

• means for, in the event of a target value variation applied to compensate for the effects of a compressed transmission mode in which transmission is interrupted during transmission gaps and the bit rate is increased correspondingly to compensate for the transmission gaps, wherein said target value variation includes a first component for compensating for the effects of said increased bit rate and a second component for compensating for other effects of transmission gaps, obtaining an approximate value of said target value variation, by approximation of said second component, and
• means for anticipatorily varying the transmission power by an amount corresponding to an approximate value of said target value variation.

A mobile station wherein a transmission power control algorithm simultaneously control the transmission power of at least two channels, including a data channel and a control channel, as a function of transmission quality target value, with the transmission power of said control channel offset relative to the transmission power of said data channel, said mobile station comprising:

• means for applying, in the event of target value variation, anticipated variations of at least one of the transmission power of the data channel, the transmission power of the control channel and the offset of the transmission power of the control channel relative to the transmission power of the data channel, to obtain an anticipated variation of the data channel transmission power;
• and
• means such that in the event of target value variation said anticipated variations cause the signal transmitted on the control channel to have the same power before and after said target variation and over the same reference period.

A mobile station wherein a transmission power control algorithm simultaneously control the transmission power of at least two channels, including a data channel and a control channel, as a function of transmission quality target value, with the transmission power of said control channel offset relative to the transmission power of said data channel, said mobile station comprising:

• means for applying, in the event of target value variation, anticipated variations of at least one of the transmission power of the data channel, the transmission power of the control channel and the offset of the transmission power of the control channel relative to the transmission power of the data channel, to obtain an anticipated variation of the data channel transmission power;
• and
• means for generating an approximate value of said target value variation, and wherein said means for applying applies an anticipated variation of the offset of the transmission power of the control channel relative to the transmission power of the data channel that corresponds to the opposite of said approximate value of the target value variation.

A mobile station wherein a transmission power control algorithm simultaneously control the transmission power of at least two channels, including a data channel and a control channel, as a function of transmission quality target value, with the transmission power of said control channel offset relative to the transmission power of said data channel, said mobile station comprising:

• means for applying, in the event of target value variation, anticipated variations of at least one of the transmission power of the data channel, the transmission power of the control channel and the offset of the transmission power of the control channel relative to the transmission power of the data channel, to obtain an anticipated variation of the data channel transmission power;
• and
• means for applying an anticipated variation of the transmission power of said data channel and the transmission power of said control channel that corresponds to said approximate value of the target value variation.

A base station controller for a mobile radio system in which a power control algorithm controls transmission power as a function of a transmission quality target value, and in which a target value variation is applied to compensate for the effects of a compressed transmission mode in which transmission is interrupted during transmission gaps and the bit rate is increased correspondingly to compensate for the transmission gaps, said target value variation including a first component for compensating the effects of said increased bit rate and a second component for compensating other effects of transmission gaps, said base station controller comprising means for signaling the same value for said second component for both transmission directions to a base station and to a mobile station.

A base station, comprising:

• means for controlling a downlink transmission power as a function of a transmission quality target value,
• means for using parameters signaled to said base station for the uplink, to determine a target value variation applied in compressed mode, and
• means for applying a power offset to said downlink transmission power, corresponding to the thus determined target value variation.