Section: 9.9.2.6 NAS security parameters from E-UTRA
Content: The purpose of the NAS security parameters from E-UTRA information element is to provide the UE with information that enables the UE to create a mapped UMTS security context. The NAS security parameters from E-UTRA information element is coded as shown in figure 9.9.2.6.1 and table 9.9.2.6.1. The NAS security parameters from E-UTRA is a type 3 information element with a length of 2 octets. The value part of the NAS security parameters from E-UTRA information element is included in specific information elements within some RRC messages sent to the UE; see 3GPP TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ]  [22]. For these cases the coding of the information element identifier and length information is defined in 3GPP TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ]  [22]. Figure 9.9.2.6.1: NAS security parameters from E-UTRA information element Table 9.9.2.6.1: NAS security parameters from E-UTRA information element