公开(公告)号：US20170359719A1

公开(公告)日：2017-12-14

申请号：US15688343

申请日：2017-08-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xing LI ,  Zhenzhen LI ,  Jing CHEN

IPC: H04W12/04 ,  H04W12/06 ,  H04L9/08 ,  H04L9/32

CPC classification number: H04W12/04 ,  H04L9/0847 ,  H04L9/3271 ,  H04L63/205 ,  H04L2463/061 ,  H04W12/06 ,  H04W12/0602 ,  H04W12/08 ,  H04W36/0038 ,  H04W36/0066 ,  H04W88/06

Abstract: Embodiments of the invention relate to the communications field, and provide a key generation method, device, and system. The method includes: after receiving a first command, obtaining, by UE located in a first-standard network, a type identifier of a second-standard network that needs to provide a service to the UE, where the first command is a service request response message, or a handover command, or any message in an air interface secure activation process; determining, by the UE, an access key according to the type identifier of the second-standard network, a key of the first-standard network, and a NAS count of the first-standard network by using a preset key derivation algorithm; and generating, by the UE, an AS key of the second-standard network according to the access key. The present invention can resolve problems of relatively long total communication latency and relatively high communication load of a heterogeneous network.