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    • 2. 发明授权
    • Inter-system handoff between wireless communication networks of different radio access technologies
    • 不同无线电接入技术的无线通信网络之间的系统间切换
    • US07957352B2
    • 2011-06-07
    • US10786795
    • 2004-02-24
    • Vieri VanghiPhilip Kenneth Price
    • Vieri VanghiPhilip Kenneth Price
    • H04B7/216
    • H04W36/0066H04W36/0083H04W36/30
    • Various schemes for performing inter-system handoff, e.g., from a UTRAN to a cdma2000 radio access network (RAN) are described. For a MAHHO scheme, the UTRAN uses measurements obtained by a multi-RAT device to determine suitable cdma2000 cell(s) for handover. The measurements are obtained by a candidate frequency search procedure, and the handover is accomplished by a handoff execution procedure. For a MDHHO scheme, the UTRAN relies on location information for the multi-RAT device to select suitable cdma2000 cell(s) for handover. For a CRHHO scheme, a new call is established on the cdma2000 RAN and the pending call on the UTRAN is released in a manner such that the handover appears seamless to the multi-RAT device. The multi-RAT device includes two modem processors that perform processing for the UTRAN and cdma2000 RAN and an application processor that controls the modem processors.
    • 描述了用于执行系统间切换的各种方案,例如从UTRAN到cdma2000无线接入网(RAN)。 对于MAHHO方案,UTRAN使用由多RAT设备获得的测量来确定用于切换的合适的cdma2000小区。 测量通过候选频率搜索过程获得,并且通过切换执行过程来实现切换。 对于MDHHO方案,UTRAN依赖于多RAT设备的位置信息来选择用于切换的合适的cdma2000小区。 对于CRHHO方案,在cdma2000 RAN上建立新的呼叫,并且以这样的方式释放UTRAN上的未决呼叫,使得切换对于多RAT设备是无缝的。 多RAT设备包括执行UTRAN和cdma2000 RAN的处理的两个调制解调器处理器以及控制调制解调器处理器的应用处理器。