Patent ID: 9060268
Filing Date: 2015-06-16
Classification: H04L,H04M,H04W

Abstract:
1. In a mobility management entity (MME) of a long term evolution (LTE) network, a method for negotiating security keys comprising: receiving a context request for requesting a mobility management context sent by a serving GPRS support node (SGSN) in a second or third generation (2G/3G) network, according to a routing area update (RAU) request from a user equipment (UE) in an idle mode; and sending the mobility management context to the SGSN, wherein the mobility management context comprises information for determining security capacities supported by the UE and authentication vector (AV)-related keys that are deduced according to a root key of the MME, wherein the AV-related keys comprise an Integrity Protection Key (IK) and a Ciphering Key (CK), or comprise values derived from the IK and the CK through an unidirectional transformation.