Abstract: To secure proper reception quality for the control signal of an EUDCH during a handover. A transmission power control unit 23 controls transmission power of a downlink control signal of an EUDCH based on at least one of the following information: the CQI in an HS-DPCCH transmitted from a mobile station 30 regarding HSDPA to the mobile station 30, information on the reflection timing of a control pointer of the EUDCH from the mobile station 30, and information on transmission power of the HS-DSCH regarding HSDPA to the mobile station 30. A transmission unit 12 transmits the downlink control signal of the EUDCH to the mobile station 30 with a controlled transmission power.

Abstract: There is provided a radio base station apparatus which is capable of increasing the probability of detection of a first path even if a radio transmission path fluctuates due to fading or the like, and of downsizing and reducing the cost of mobile radio terminal apparatus. SIR estimators 13-1 through 13-N calculate reception SIRs for respective subcarriers from output signals from pilot demodulators 12-1 through 12-N. SIR averager 14 averages the SIRs for the respective subcarriers to calculate an SIR for the overall signal. Based on the calculated SIR, threshold value setting unit 15 sets a threshold value for a path search. First path detector 19 conducts a path search based on the threshold set by threshold value setting unit 15. Arrival time calculator 21 calculates an arrival time based on a first path detected by first path detector 19.

Abstract: There is provided a radio base station apparatus which is capable of increasing the probability of detection of a first path even if a radio transmission path fluctuates due to fading or the like, and of downsizing and reducing the cost of mobile radio terminal apparatus. SIR estimators 13-1 through 13-N calculate reception SIRs for respective subcarriers from output signals from pilot demodulators 12-1 through 12-N. SIR averager 14 averages the SIRs for the respective subcarriers to calculate an SIR for the overall signal. Based on the calculated SIR, threshold value setting unit 15 sets a threshold value for a path search. First path detector 19 conducts a path search based on the threshold set by threshold value setting unit 15. Arrival time calculator 21 calculates an arrival time based on a first path detected by first path detector 19.

Abstract: To secure proper reception quality for the control signal of an EUDCH during a handover. A transmission power control unit 23 controls transmission power of a downlink control signal of an EUDCH based on at least one of the following information: the CQI in an HS-DPCCH transmitted from a mobile station 30 regarding HSDPA to the mobile station 30, information on the reflection timing of a control pointer of the EUDCH from the mobile station 30, and information on transmission power of the HS-DSCH regarding HSDPA to the mobile station 30. A transmission unit 12 transmits the downlink control signal of the EUDCH to the mobile station 30 with a controlled transmission power.

Abstract: The present invention provides a base station that can expand a position information providing service in the closed range of a single cell. The base station stores the transmission time in a transmission time storing part, calculates the RTT in an RTT calculating part, employing a received signal from a mobile station, and calculates the distance from a calculated time stamp in a distance measuring part. The base station calculates a fading correlation value employing a channel estimated value in a charnel estimate calculating part, after the demodulation of DPCCH is completed in a DPCCH demodulating part, performs a speed calculating process in a speed calculating part, and performs a travel direction estimating process in a travel direction estimating part from the percentages of ‘0’ and ‘1’ in a bit string.

Abstract: A wireless communication system comprises; a wireless communication device; and a wireless base station. The wireless communication device detects a fluctuation of the wireless propagation condition; transmits a first uplink signal at a first transmission power to the wireless base station after detecting the fluctuation of the wireless propagation condition, receives a first downlink signal from the wireless base station; and determines a second transmission power of a second uplink signal based on the first transmission power after the receiving means receives the first down link signal. The wireless base station receives the first uplink signal from the wireless communication device, and transmits the first down link signal to the wireless communication device in response to the first uplink signal after the base station receiving means receives the first uplink signal.