초록 ▼

A mobile station, and a method for making a handover in a CDMA cellular radio system, which includes in each cell at least one base station connected to the mobile stations in the cell. The connection includes both a traffic channel and one or more control channels. The transmissions of the base sta

A mobile station, and a method for making a handover in a CDMA cellular radio system, which includes in each cell at least one base station connected to the mobile stations in the cell. The connection includes both a traffic channel and one or more control channels. The transmissions of the base stations are not synchronized with each other. A mobile station, after having established a simultaneous connection with two or more of the base stations while making a handover, transmits to the base stations using the same spreading code. The signals received by the base stations are combined in a base station controller, or the like. The base stations with which the mobile station communicates simultaneously, transmit to the mobile station each using a different spreading code. The mobile station receives and demodulates each of the signals, transmitted with different spreading codes, by a different rake receiving unit independent of the other units, each receiving unit being synchronized with the signal from the base station it is receiving. The mobile station combines the signals it has received from the base stations and demodulated by using its plural rake receiving units.

대표청구항 ▼

A mobile station for use in a CDMA cellular radio system which has a plurality of cells, in each of which at least one base station is arranged to be connected to a plurality of mobile stations located in the respective cells, by respective connections, and in which signal transmissions of said base

A mobile station for use in a CDMA cellular radio system which has a plurality of cells, in each of which at least one base station is arranged to be connected to a plurality of mobile stations located in the respective cells, by respective connections, and in which signal transmissions of said base stations in different ones of said cells are not synchronized with one another, said mobile station comprising: an adjustable-power transmitter, for transmitting signals to be received by said base stations via said respective connections; a receiver comprising a plurality of rake receiving units each including a control unit and a plurality of correlators on respective branches, collectively for receiving signal transmissions from a respective of said one and other base stations, and demodulating and combining such signal transmissions, and providing a respective resulting output a combiner for combining into one resulting output demodulated and combined resulting outputs of reception of signal transmissions from the one and other base stations.