Section: 10.5.3.2.2 Authentication Failure parameter (UMTS and EPS authentication challenge)
Content: The purpose of the Authentication Failure parameter information element is to provide the network with the necessary information to begin a re-authentication procedure (see 3GPP TS 33.102[ 3G security; Security architecture ]  [5a]) in the case of a 'Synch failure', following a UMTS or EPS authentication challenge. The Authentication Failure parameter IE is coded as shown in figure 10.5.76.2/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ]  and table 10.5.90.2/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ] . The Authentication Failure parameter IE is a type 4 information element with a length of 16 octets. Figure 10.5.76.2/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ]  Authentication Failure parameter information element (UMTS and EPS authentication challenge) Table 10.5.90.2/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ] : Authentication Failure parameter information element