Wireless communication power control

A method for power control in a wireless communication system, comprising the steps of:

• obtaining, in a first node of said wireless communication system, received signal power of signals transmitted from a second node of said wireless communication system over a wireless signal channel;
• providing power control signals intended for power control of transmission over said wireless signal channel for obtaining a first targeted signal to interference level, based on obtained said received signal power;
• quantizing said power control signals into quantized power control signals;
• transferring said quantized power control signals over a wireless control channel from said first node to said second node;
• controlling, in said second node, a transmission power for signals transmitted over said wireless signal channel in response to received power control signals;
• and
• controlling, in said first node, a transmission power for said quantized power control signals over said wireless control channel to obtain a second targeted signal to interference level;
• and
• warping, in said first node, said power control signals into warped power control signals by a first filter, whereby said step of quantizing is performed on said warped power control signals;
• and
• dewarping, in said second node, said received warped and quantized power control signals into said power control signals used for controlling said transmission power for signals transmitted over said wireless signal channel by filtering said received warped and quantized power control signals by a second filter;
• wherein
• said first and second filters being linear filters arranged for reducing an influence of quantization noise on said controlling of said transmission power for signals transmitted over said wireless signal channel;
• and
• said second filter being an inverse filter with respect to said first filter.

A node for use in a wireless communication system, comprising:

• controller device, arranged for power control of wireless channels in said wireless communication system;
• said controller device comprising a receiver power control section;
• said receiver power control section in turn comprising:
• means for obtaining received signal power of signals received over a wireless signal channel of said wireless communication system;
• power control signal unit connected to said means for obtaining received signal power;
• said power control signal unit being arranged for providing power control signals intended for power control of transmission over said wireless signal channel for obtaining a first targeted signal to interference level;
• quantizer arranged to quantize signal based on said power control signals into quantized power control signals;
• transmitter connected to said receiver power control section and arranged for transmitting said quantized power control signals over a wireless control channel of said wireless communication system;
• said controller device further comprising a transmitter power control section connected to said transmitter;
• said transmitter power control section being arranged for controlling a transmission power for said quantized power control signals over said wireless control channel to obtain a second targeted signal to interference level,
• wherein said receiver power control section further comprises:
• a warper unit connected to said power control signal unit;
• said warper unit comprising a first filter and being arranged for warping said power control signals into warped power control signals by said first filter,
• whereby said quantizer is connected to said warper unit and performs quantization on said warped power control signals;
• and
• said first filter being a linear filter arranged for reducing an influence of quantization noise on the use of said power control signals.