Patent ID: 8934914
Filing Date: 2015-01-13
Classification: H04W

Abstract:
1. A key separation method applicable to a Serving GPRS Support Node (SGSN), comprising: determining whether a source node is a Home NodeB (HNB), when one of the following occurs: (a) a User Equipment hands over from the source node to a target node, and (b) when the User Equipment moves from the source node to the target node in an idle state; and when the source node is the Home NodeB, triggering an Authentication and Key Agreement procedure according to an operator's policy, to update a Ciphering Key and Integrity Key, wherein when a relocation request message sent by the source node to the SGSN carries a radio network controller identification (RNC ID) of an HNB gateway (GW), the SGSN determines that the source node is an HNB.