Section: 14.4A Fast Re-authentication NAI
Content: The Fast Re-authentication NAI in both EAP-SIM and EAP-AKA shall take the form of a NAI as specified in clause 2.1 of IETF RFC 4282 [53]. If the 3GPP AAA server does not return a complete NAI, the Fast Re-authentication NAI shall consist of the username part of the fast re-authentication identity as returned from the 3GPP AAA server and the same realm as used in the permanent user identity. If the 3GPP AAA server returns a complete NAI as the re-authentication identity, then this NAI shall be used. The username part of the fast re-authentication identity shall be decorated as described in 14.4 if the Selected PLMN is different from the HPLMN. NOTE: The permanent user identity is either the root or decorated NAI as defined in clauses 14.3 and 14.4. EXAMPLE 1: If the fast re-authentication identity returned by the 3GPP AAA Server is 458405627015 and the IMSI is 234150999999999 (MCC = 234, MNC = 15), the Fast Re-authentication NAI for the case when NAI decoration is not used takes the form: 458405627015@wlan.mnc015.mcc234.3gppnetwork.org EXAMPLE 2: If the fast re-authentication identity returned by the 3GPP AAA Server is "458405627015@aaa1.wlan.mnc015.mcc234.3gppnetwork.org" and the IMSI is 234150999999999 (MCC = 234, MNC = 15), the Fast Re-authentication NAI for the case when NAI decoration is not used takes the form: 458405627015@aaa1.wlan.mnc015.mcc234.3gppnetwork.org EXAMPLE 3: If the fast re-authentication identity returned by the 3GPP AAA Server is 458405627015 and the IMSI is 234150999999999 (MCC = 234, MNC = 15), and the PLMN ID of the Selected PLMN is MCC = 610, MNC = 71, the Fast Re-authentication NAI takes the form: wlan.mnc015.mcc234.3gppnetwork.org !458405627015@wlan.mnc071.mcc610.3gppnetwork.org