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Example 4.1 Illustration of LTE/EPS NAS MM Layer Message
ОглавлениеConsider the LTE/EPS Attach Complete NAS layer EMM message (see Figure 4.4) reproduced from TS 24.301 [46], which is sent from the UE to the Mobility Management Entity (MME) through the eNodeB. They are described in the tabular format and also their encoding method, i.e. IE format‐TLV, is the same. But there is a difference between the GSM, UMTS, GPRS and LTE/EPS, and 5G NAS layer messages. The GSM, GPRS, and UMTS air interface Mobility Management (GMM) messages are not security protected, but every LTE/EPS, 5GS NAS, MM layer message is security protected. For this purpose, the header of every LTE/EPS EMM or 5G MM message contains the Security Header Type IE.
Figure 4.4 LTE/EPS NAS layer 3 attach complete message.
Source: © 2014. 3GPP ™ TSs and TRs are the property of ARIB, ATIS, CCSA, ETSI, TSDSI, TTA and TTC who jointly own the copyright in them. © 2014, 3GPP.
