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    • 5. 发明申请
    • ENHANCED MOBILITY SUPPORT FOR WIRELESS COMMUNICATION
    • 增强无线通信的移动性支持
    • WO2007127800A2
    • 2007-11-08
    • PCT/US2007/067419
    • 2007-04-25
    • QUALCOMM IncorporatedFLORE, OronzoMALLADI, Durga PrasadCHAPONNIERE, Etienne F.GRILLI, Francesco
    • FLORE, OronzoMALLADI, Durga PrasadCHAPONNIERE, Etienne F.GRILLI, Francesco
    • H04W36/00H04W36/18H04W56/00H04W76/02H04W76/04H04W88/02
    • H04W56/0045H04W36/0055
    • Techniques for quickly and efficiently performing handover are described. A user equipment (UE) may maintain a link with a serving cell and may communicate with this cell via the established link. The UE may have a candidate set of non-serving cells that are candidates for handover. The UE may maintain uplink synchronization with one or more non-serving cells in the candidate set, without having to maintain links with any of the non-serving cells. The UE may update uplink synchronization with the non-serving cells via an access procedure, e.g., send access probes to the non-serving cells and receive timing adjustments from these cells. One non-serving cell with which the UE has maintained uplink synchronization may be selected as a target cell for handover. The UE may then perform handover from the serving cell to the target cell, without performing uplink synchronization during the handover, which may improve handover latency and success rate.
    • 描述用于快速和有效地执行切换的技术。 用户设备(UE)可以维护与服务小区的链路,并且可以经由建立的链路与该小区通信。 UE可以具有作为切换候选的非服务小区的候选集合。 UE可以维护候选集中的一个或多个非服务小区的上行链路同步,而不必维护与任何非服务小区的链路。 UE可以经由接入过程来更新与非服务小区的上行链路同步,例如,向非服务小区发送接入探测,并从这些小区接收定时调整。 UE可以选择保持上行链路同步的一个非服务小区作为切换目标小区。 然后,UE可以执行从服务小区到目标小区的切换,而不需要在切换期间执行上行链路同步,这可以提高切换等待时间和成功率。