Outer loop power control for F-DPCH
View Patent ↗A method and arrangement are described herein for power control for the F-DPCH (Fractional-Dedicated Physical Control Channel) for a 3rd generation mobile telecommunication system applying HSDPA, in particular for a user equipment in soft handover.
1. A method in a user equipment of a telecommunication network applying high speed downlink packet access, HSDPA, said method for performing outer loop power control of a downlink channel from a base station and dedicated to said user equipment,
characterised by
maintaining a required bit error ratio (BER) for the TPC-commands of the serving base station by adjusting the target of the signal-to-interference ratio (SIR) in the user equipment to a new target value using a maximum function of a weighted set of the estimated bit error ratios of the individually received TPC-commands for radio links of said user equipment.
2. The method according to claim 1 , whereby the base station supports a high-speed downlink shared channel, HS-DSCH, and all except for one of the weights of said weighted set are equal to zero.
3. The method according to claim 1 , whereby said TPC-commands are reliable TPC-commands.
4. An arrangement in a user equipment of a telecommunication network applying high speed downlink packet access, HSDPA, said arrangement for performing outer loop power control of a downlink channel from a base station and dedicated to said user equipment,
characterised in
means for maintaining a required bit error ratio (BER) for the TPC-commands of the serving base station comprising means for adjusting the target of the signal-to-interference ratio (SIR) in the user equipment to a new target value using a maximum function of a weighted set of the estimated bit error ratios of the individually received TPC-commands for radio links of said user equipment.