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    • 50. 发明公开
    • MECHANISM TO HANDLE UE ASSISTANCE INFORMATION UPON HANDOVER
    • 机械制造商HANDHABUNG VON BENUTZEREINHEITEN-HILFSINFORMATIONEN BEI EINEM HANDOVER
    • EP2910040A1
    • 2015-08-26
    • EP13722598.3
    • 2013-04-11
    • Telefonaktiebolaget LM Ericsson (PUBL)
    • YAVUZ, EmreWÄNSTEDT, StefanSTATTIN, Magnus
    • H04W8/20H04W8/24H04W36/00
    • The UE, source eNodeB, and/or target eNodeB use one or more existing Radio Resource Control (RRC) messages already available during handover to exchange at least one status report comprising UE assistance information, such as power preference indicators (PPI). The UE and the target eNodeB are thus able to obtain the same up-to-date UE status without any additional signaling. In one embodiment, the UE exchanges a handover preparation status report with the target eNodeB using a first RRC reconfiguration message transmitted from the source eNodeB to the UE, where the handover preparation status report is generated during handover preparation by the target eNodeB. In another embodiment, the UE exchanges a handover execution status report with the target eNodeB during handover execution using a second RRC reconfiguration message transmitted from the UE to the target eNodeB, where the handover execution status report is generated during handover execution. In another embodiment, the UE exchanges multiple status reports with the target eNodeB using multiple RRC reconfiguration messages, where the status reports are generated during handover preparation and handover execution. The handover preparation status report is transmitted from the target eNodeB to the UE and includes the status report as perceived by the target node at the time of handover preparation. The handover execution status report is transmitted from the UE to the target eNodeB and includes the status report as stored in the UE memory at the time of handover execution. The first RRC reconfiguration message is a RRC connection reconfiguration message and the second RRC reconfiguration message is a RRC connection reconfiguration complete message.
    • UE,源eNodeB和/或目标eNodeB使用在切换期间已经可用的一个或多个现有无线电资源控制(RRC)消息来交换包括UE辅助信息的至少一个状态报告,例如功率偏好指示符(PPI)。 因此,UE和目标eNodeB能够获得相同的最新的UE状态而无需任何附加的信令。 在一个实施例中,UE使用从源eNodeB向UE发送的第一RRC重配置消息与目标eNodeB交换切换准备状态报告,其中由目标eNodeB进行切换准备期间生成切换准备状态报告。 在另一个实施例中,UE在切换执行期间使用从UE发送到目标eNodeB的第二RRC重配置消息来与目标eNodeB交换切换执行状态报告,其中在切换执行期间生成切换执行状态报告。 在另一个实施例中,UE使用多个RRC重配置消息与目标eNodeB交换多个状态报告,其中在切换准备和切换执行期间生成状态报告。 切换准备状态报告从目标eNodeB发送到UE,并且包括在切换准备时由目标节点感知的状态报告。 切换执行状态报告从UE发送到目标eNodeB,并且包括在切换执行时存储在UE存储器中的状态报告。 第一RRC重配置消息是RRC连接重配置消息,第二RRC重配置消息是RRC连接重配置完成消息。