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    • 8. 发明授权
    • Method for making a handover in a CDMA cellular radio system, and a
mobile station
    • 在CDMA蜂窝无线电系统中进行切换的方法以及移动台
    • US5652748A
    • 1997-07-29
    • US436452
    • 1995-05-22
    • Petri JolmaRisto Uola
    • Petri JolmaRisto Uola
    • H04B1/707H04B7/005H04B7/26H04W36/18H04W52/40H04W56/00H04L27/30
    • H04W36/18H04B1/7115H04B7/2628H04W52/40H04W56/00
    • 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.
    • PCT No.PCT / FI94 / 00415 Sec。 371日期:1995年5月22日 102(e)日期1995年5月22日PCT 1994年9月19日PCT公布。 公开号WO95 / 08901 日期1995年3月30日A移动台以及在CDMA蜂窝无线电系统中进行切换的方法,其在每个小区中包括连接到小区中的移动站的至少一个基站。 连接包括业务信道和一个或多个控制信道。 基站的传输不是彼此同步的。 移动站在进行切换之后已经与两个或更多个基站建立了同时连接之后,使用相同的扩展码向基站发送。 由基站接收的信号在基站控制器等中组合。 移动台同时进行通信的基站,使用不同的扩展码向移动台发送。 移动台接收和解调用不同的扩展码发送的每个信号,由独立于其他单元的不同的rake接收单元,每个接收单元与其正在接收的基站的信号同步。 移动台组合从基站接收到的信号,并通过使用其多个耙式接收单元进行解调。