Section: 9.11.2.9 S1 mode to N1 mode NAS transparent container
Content: The purpose of the S1 mode to N1 mode NAS transparent container information element is to provide the UE with parameters that enable the UE to create a mapped 5G NAS security context and take this context into use after inter-system change to N1 mode in 5GMM-CONNECTED mode. The S1 mode to N1 mode NAS transparent container information element is coded as shown in figure 9.11.2.9.1 and table 9.11.2.9.1. The S1 mode to N1 mode NAS transparent container is a type 4 information element with a length of 10 octets. The value part of the S1 mode to N1 mode NAS transparent container information element is included in specific information elements within some RRC messages sent to the UE. NOTE: For these cases the coding of the information element identifier and length information of RRC is defined in 3GPP TS 38.331[ NR; Radio Resource Control (RRC); Protocol specification ]  [30]. Figure 9.11.2.9.1: S1 mode to N1 mode NAS transparent container information element Table 9.11.2.9.1: S1 mode to N1 mode NAS transparent container information element