Patent ID: 9673974
Date: 2017-06-06
CPC Classifications: H04L,H04W

Claim:
1. A method for establishing a security context, wherein a user equipment (UE) in the method is connected to a core network by using a Uu interface through a base station and connected to the core network by using a Uu′ interface through an access node, comprising: acquiring an encryption algorithm of the access node; acquiring a root key and deriving an encryption key of the access node according to the root key and the encryption algorithm; sending the encryption key and the encryption algorithm to the access node, so that the access node starts downlink encryption and uplink decryption; sending the encryption algorithm of the access node to the UE so as to negotiate the encryption algorithm with the UE; and instructing the access node to start downlink encryption and uplink decryption and instructing, during algorithm negotiation, the UE to start downlink decryption and uplink encryption.