Patent ID: 8732816
Filing Date: 2014-05-20
Classification: H04L,H04W

Abstract:
1. A method in a User Equipment (UE) for exchanging data between the UE and a core network via a security gateway, the method comprising: establishing an inactive pair of tunnel mode security associations between the UE and said security gateway for an untrusted access network, wherein said establishing includes a transmission to said security gateway of a key negotiation message indicating that the pair of security associations is to be in an inactive status; establishing a different inactive pair of tunnel mode security associations for a different untrusted access network; detecting an attachment to or a need to attach to the untrusted access network; determining that the security association pair associated with the untrusted access network is to be applied based upon the detecting of the attachment or the need to attach to the untrusted access network; and applying said established inactive pair of security associations to user traffic traversing the untrusted access network, wherein said applying includes a transmission of an information exchange message to said security gateway indicating that said established inactive pair of security associations is to be applied.