Patent ID: 8605644

Claim:
An apparatus comprising: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform: receiving at a mobile station from a base station in a wireless network, a channel quality threshold and a power adjustment value; measuring a downlink channel quality associated with each of a plurality of subchannels in a downlink direction from the base station; selecting one or more of the subchannels that have a channel quality that is greater than or equal to the channel quality threshold; and performing the following for each of the selected one or more subchannels: determining a transmission power for transmitting a sounding signal via the subchannel based upon the measured downlink channel quality for the subchannel and power adjustment value; and transmitting, via a wireless transceiver, the sounding signal in an uplink direction to the base station via the subchannel using the determined transmission power for the subchannel.