Abstract: A wireless base station unit (100) monitors total transmission power, which is a sum of transmission power to all of mobile station terminals (200-203) connected for communication. When the total transmission power exceeds a first threshold value, which is a criterion for judging whether to reduce the transmission power or not, an upper limit value of the transmission power to the mobile station terminal at the lowest priority level is reduced by a prescribed quantity. When the total transmission power exceeds a second threshold value, which is larger than the first threshold value, communication connection with the mobile station terminal at the lowest priority level is cut.

Abstract: Radio base station apparatus 100 of the present invention monitors total transmission power which is the sum of transmission power for all mobile station terminals 200-203 connected for communication, reduces the upper limit of transmission power for the lowest prioritized mobile station terminal by a predetermined amount when the total transmission power exceeds a first threshold which is referenced to determine whether or not the transmission power has been reduced, and terminates communication with the lowest prioritized mobile station terminal when the total transmission power exceeds a second threshold which is larger than the first threshold.

Abstract: A path searcher of a spread spectrum receiver includes a number of correlators each of which produces a replica of a scrambled synchronization code and determines a correlation between the replica and a received spread spectrum signal. Each of the correlators performs a correlation operation between the received spread spectrum signal and the replica at a rate higher than a chip rate of the spread spectrum signal by successively shifting the replica with respect to the spread spectrum signal.

Abstract: A spread spectrum communication system includes a plurality of cells which share common frequencies. Each base station managing each cell includes transmitters for transmitting a reception load state of the base station to other base stations managing other cells. Receivers for receiving reception load states of the other base stations and transmitters for transmitting a signal having control information interpolated therein to each mobile station within the cell under management are included in the system. The control information is used for controlling a transmission station of each mobile station.

Abstract: A spread spectrum communication system includes a plurality of mobile stations and a plurality of base stations that share the same frequency and operate independently. Each of the base stations can serve as a local base station and a non-local base station and has an element for always transmitting a pilot signal (base station reference signal) at a constant power level. Each of the mobile stations also has a quality measuring element for measuring base station reference signals received from the local base station and an adjacent base station serving as a non-local base station, and a transmission power controlling element for controlling the power level of a signal transmitted from the relevant mobile station corresponding to the measured results in such a manner that when the relevant mobile station has approached the adjacent base station, the transmission power controlling element decreases the power level of the transmission signal.

Abstract: A path searcher of a spread spectrum includes a number of correlators each of which produces a replica of a scrambled synchronization code and determines a correlation value between the replica and a received spread spectrum signal. Each of the correlators performs a correlation operation between the received spread spectrum signal and the replica at a rate higher than a chip rate of the spread spectrum signal by successively shifting the replica with respect to the spread spectrum signal.