Section: 19.5 Access Network Identity
Content: A trusted non-3GPP access network used by the UE to access EPS can be identified using the Access Network Identity. The Access Network Identity is used as an input parameter in the EPS security procedures as specified in 3GPP TS 33.402[ 3GPP System Architecture Evolution (SAE); Security aspects of non-3GPP accesses ]  [69]. The format and signalling of the parameter between the network and the UE is specified in 3GPP TS 24.302[ Access to the 3GPP Evolved Packet Core (EPC) via non-3GPP access networks; Stage 3 ]  [77] and the format and signalling of this parameter between access network and core network is specified in 3GPP TS 29.273[ Evolved Packet System (EPS); 3GPP EPS AAA interfaces ]  [78]. The encoding of the Access Network Identity shall be specified within 3GPP, but the Access Network Identity definition for each non-3GPP access network is under the responsibility of the corresponding standardisation organisation respectively.