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    • 8. 发明公开
    • IMPROVED SOFT HANDOFF ALGORITHM AND WIRELESS COMMUNICATION SYSTEM FOR THIRD GENERATION CDMA SYSTEMS
    • 改进算法软下一页富和无线电通信系统的第三代CDMA系统
    • EP1243155A1
    • 2002-09-25
    • EP00988448.7
    • 2000-12-28
    • QUALCOMM INCORPORATED
    • SOROKINE, VladislavCHEN, Qingxin
    • H04Q7/38
    • H04W36/18
    • A method and apparatus for providing soft handoff in a third generation code division multiple access (CDMA) wireless communication system 34. The method comprises establishing communication between the wireless communication device 10 and the at least one serving base station 20, monitoring the reverse channel signal strength from the wireless communication device 21b, 22b, 23b, 24b, 25b, 26b from at least one neighboring base station, transmitting to a base station controller 31 the wireless communication device signal strength 21c, 22c, 23c, 24c, 25c, 26c, detected at each neighboring base station 21, 22, 23, 24, 25, 26, compiling at the base station controller 31 a list of effective neighboring base stations periodically transmitting a neighboring base station list update message 30, 32 to the wireless communication device 10, storing the effective neighboring base station list as a neighbor set in the wireless communication device 10, performing forward channel signal strength searching of the neighbor set in the wireless communication device 10 and monitoring the signals from the effective neighboring base stations to accomplish a handoff between the at least one serving base station 20 and the receiving neighboring base station 21, 22, 23, 24, 25 or 26.