Patent ID: 8098743

Claim:
A pilot signal transmission method comprising steps of: in a mobile station: transmitting first pilot signals on a first channel; and transmitting second pilot signals on a second channel according to a transmission speed of data that are transmitted on the second channel; in a base station: measuring a first reception quality for said first pilot signals and a second reception quality for said second pilot signals; determining whether said second pilot signals are used depending on the first reception quality of said first pilot signals and the second reception quality of said second pilot signals; when said second pilot signals are used, using said first pilot signals and said second pilot signals to measure a single reception quality for combined signals received in all channels; when said second pilot signals are not used, using only said first pilot signals to measure a single reception quality for combined signals received in all channel; and generating transmission power control signals based on results of measuring said reception quality; and in said mobile station: determining a transmission power of said first and said second channels according to said transmission power control signals that have been generated in said base station, wherein said base station uses the first pilot signals and the second pilot signals in the measuring of said single reception quality when the second reception quality of said second pilot signals is higher than a prescribed first reception quality threshold value; wherein said first reception quality threshold value is determined based on the first reception quality of said first pilot signals.