Method for controlling transmission power in a mobile radiocommunication system

2/ A method according to claim 1, characterized in that:

• said first value is equal to 0;
• and
• the difference between said first and second values corresponds to the variation in power to be applied to the second channel.

3/ A method according to claim 1, characterized in that:

• said first value corresponds to a component of the variation in the power to be applied to the first channel;
• and
• the difference between said first and second values corresponds to the difference between said power variation component to be applied to the first channel and the power variation to be applied to the second channel.

4/ A method according to claim 1, characterized in that:

• said first value corresponds to the power variation to be applied to the first channel;
• and
• the difference between said first and second values corresponds to the difference between a power variation component to be applied to the first channel and a power variation component to be applied to the second channel.

5/ A method according to any one of claims 1 to 4, characterized in that said change in required transmission conditions corresponds to using compressed mode.

6/ A method cording to any one of claims 1 to 5, characterized in that said first channel is a control channel.

7/ A method according to any one of claims 1 to 5, characterized in that said second channel is a data channel.

8/ A method according to claims 3, 5, and 6, characterized in that said power variation component to be applied to the control channel is a component (ΔPILOT) for compensating a change in the number of pilot bits for a pilot channel transmitted in said control channel, said number of pilot bits possibly differing between compressed frames and normal frames.

9/ A method according to claims 4, 5, and 6, characterized in that said power variation to be applied to the control channel comprises a component (ΔPILOT) for compensating a change in the number of pilot bits for a pilot signal transmitted in said control channel, the number of pilot bits possibly differing between compressed frames and normal frames, together with a component (ΔSIR1_coding+ΔSIR2_coding) for compensating the performance degradation due to the transmission gaps in compressed mode.

10/ A method according to any one of claims 1 to 9, characterized in that it is used for controlling power in the up direction.

11/ A method according to any one of claims 1 to 9, characterized in that it is used for controlling power in the down direction.

12/ A base station for a mobile radiocommunications system, characterized in that it includes means for implementing a method according to any one of claims 1 to 11.

13/ A base station according to claim 12, characterized in that in order to control power in the up direction, it includes means for applying a variation having said first value to said target value (SIR target).

14/ A base station according to claim 12, characterized in that in order to control power in the down direction, it includes means for applying a variation having said second value to said power offset (PO).

15/ A base station according to claim 12, characterized in that in order to control power in the up direction, it includes means for signaling to a mobile station said variation having said second value for application to said power offset (PO).

16/ A base station according controller for a radiocommunications system, the controller being characterized in that it includes means for implementing a method according to any one of claims 1 to 11.

17/ A base station controller according to claim 16, characterized in that in order to control power in the up direction, it includes means for applying a variation having said first value to said target value (SIR target).

18/ A base station controller according to claim 16, characterized in that in order to control power in the down direction, it includes means for applying a variation having said second value to said power offset (PO).

19/ A base station controller according to claim 16, characterized in that in order to control power in the up direction, it includes means for signaling to a mobile station said variation having said second value to be applied to said power offset (PO).

20/ A mobile station for a mobile radiocommunications system, characterized in that it includes means for implementing a method according to any one of claims 1 to 11.

21/ A mobile station according to claim 20, characterized in that in order to control power in the down direction, it includes means for applying a variation having said first value to said target value (SIR target).

22/ A mobile station according to claim 20, characterized in that, in order to control power in the up direction, it includes means for applying a variation having said second value to said power offset (PO).

23/ A mobile station according to claim 20, characterized in that in order to control power in the down direction, it includes means for signaling to a network said variation having said second value for application to said power offset (PO).

24/ A mobile radiocommunications system including at least one base station in accordance with any one of claims 12 to 15, and/or at least one base station controller in accordance with any one of claims 16 to 19, and/or at least one mobile station in accordance with any one of claims 20 to 23.

25/ A method of controlling transmission power in a mobile radiocommunications system, in which a data channel (DPDCH) and a control channel (DPCCH) transmitted by a single transmitter have their respective transmission powers controlled by a power control algorithm as a function of a target value for transmission quality (SIR target) corresponding to the control channel which is taken as a reference, and in which, for the data channel, a transmission power offset (PO) relative to the control channel is applied, where necessary, which method is characterized in that in the event of a change in transmission conditions being required, corresponding to using compressed mode, a variation is applied to said target value (SIR target), said variation comprising a component (ΔPILOT) for compensating a change in the number of pilot bits for a pilot signal transmitted in said control channel, where said number of pilot bits possibly differing between compressed frames and normal frames, together with a component (ΔSIR1_coding+ΔSIR2_coding) for compensating the performance degradation due to the transmission gaps in compressed mode.

26/ A base station for a mobile radiocommunications system, characterized in that it includes means for implementing a method according to claim 25.

27/ A base station according to claim 26, characterized in that in order to control power in the up direction, it includes means for applying a variation to said target value (SIR target), which variation comprises a component (ΔPILOT) for compensating a change in the number of pilot bits for a pilot signal transmitted in said control channel, said number of pilot bits possibly differing between compressed frames and normal frames, together with a component (ΔSIR1_coding+ΔSIR2_coding) for compensating the performance degradation due to the transmission gaps in compressed mode.

28/ A base station controller for a mobile radiocommunications system, characterized in that it includes means for implementing a method according to claim 25.

29/ A base station controller according to claim 28, characterized in that, in order to control power in the up direction, it includes means for applying a variation to said target value (SIR target), which variation comprises a component (ΔPILOT) for compensating a change in the number of pilot bits for a pilot signal transmitted in said control channel, said number of pilot bits possibly differing between compressed frames and normal frames, together with a component (ΔSIR1_coding+ΔSIR2_coding) for compensating the performance degradation due to the transmission gaps in compressed mode.

30/ A mobile station for mobile radiocommunications, the station being characterized in that it includes means for implementing a method according to claim 25.

31/ A mobile station according to claim 30, characterized in that, in order to control power in the down direction, it includes means for applying a variation to said target value (SIR target), said variation comprising a component (ΔPILOT) for compensating a change in the number of pilot bits for a pilot signal transmitted in said control channel, said number of pilot bits possibly differing between compressed frames and normal frames, together with a component (ΔSIR1_coding+ΔSIR2_coding) for compensating the degradation in performance due to the transmission gaps in compressed mode.