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    • 25. 发明申请
    • Handover method and apparatus between different systems
    • 不同系统之间的切换方法和装置
    • US20070036109A1
    • 2007-02-15
    • US11482109
    • 2006-07-07
    • No-Jun KwakSung-Ho ChoiSoeng-Hun KimKyeong-In JeongEun-Hui BaeHan-Na LimO-Sok Song
    • No-Jun KwakSung-Ho ChoiSoeng-Hun KimKyeong-In JeongEun-Hui BaeHan-Na LimO-Sok Song
    • H04Q7/00
    • H04W36/0066H04W36/0011H04W36/14H04W76/22H04W92/02
    • A method and apparatus performs handover from an OFDM-based E-UMTS system to a CDMA-based UMTS system. A UE in communication with a PDN via the E-UMTS system, measures signal strength of the UMTS system, and sends a measurement report message indicating the measured signal strength to the E-UMTS system. A radio access network (E-RAN) of the E-UMTS system, determines whether to perform handover from the E-UMTS system to the UMTS system based on the measured signal strength. If the handover is to be performed, a core network (E-CN) of the E-UMTS system generates a PDP context and an MM context for the UE in response to a handover request from the E-RAN. The E-CN sets up a data tunnel for the UE to a GGSN of the UMTS system using the PDP/MM context. After setting up the data tunnel, the E-CN sends to the UE a handover command message including information on a radio bearer (RB) to be used by the UE to access the UMTS system. The UE accesses the UMTS system using the RB information. After accessing the UMTS system, the UE forwards user data for the UE via a data transmission path composed of the E-CN, the data tunnel, a SGSN, and a RAN of the UMTS system, between the PDN and the UE.
    • 方法和装置执行从基于OFDM的E-UMTS系统到基于CDMA的UMTS系统的切换。 经由E-UMTS系统与PDN通信的UE测量UMTS系统的信号强度,并向E-UMTS系统发送指示测量信号强度的测量报告消息。 E-UMTS系统的无线接入网络(E-RAN)基于测量的信号强度来确定是否执行从E-UMTS系统到UMTS系统的切换。 如果要执行切换,E-UMTS系统的核心网络(E-CN)响应于来自E-RAN的切换请求,为UE生成PDP上下文和MM上下文。 E-CN使用PDP / MM上下文为UE建立到UMTS系统的GGSN的数据隧道。 在建立数据隧道之后,E-CN向UE发送切换命令消息,该切换命令消息包括要被UE用于接入UMTS系统的无线承载(RB)信息。 UE使用RB信息访问UMTS系统。 在接入UMTS系统之后,UE经由PDN与UE之间的E-CN,数据隧道,SGSN和RAN的RAN组成的数据传输路径转发UE的用户数据。