公开(公告)号：US09900768B2

公开(公告)日：2018-02-20

申请号：US13908276

申请日：2013-06-03

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaoxiao Zheng ,  Yinghong Yang ,  Li Feng ,  Xiaoying Xu ,  Zhufen Fu ,  Lunfeng Yu ,  Yafei Sun

IPC: H04L29/06 ,  H04W12/00 ,  H04W12/02 ,  H04W80/02

CPC classification number: H04W12/00 ,  H04L63/0428 ,  H04W12/02 ,  H04W80/02

Abstract: Embodiments of the present invention provide a method and a device for synchronizing an uplink ciphering parameter in unacknowledged mode. The method for synchronizing an uplink ciphering parameter in unacknowledged mode includes: sending an indication message to a terminal when detecting that an unrecoverable error occurs in an uplink packet or that the uplink packet is invalid, where the indication message is used to instruct the terminal to initialize an uplink ciphering parameter; receiving a response message sent by the terminal; and initializing the uplink ciphering parameter according to an initial value of the ciphering parameter. The embodiments of the present invention solve a service defect, namely, a break of the communication link caused by synchronization of an uplink ciphering parameter between the terminal and the radio network controller in unacknowledged mode, and shorten the time of synchronizing the uplink ciphering parameter without interrupting the service.