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TS 24.301 (CT1)
Non-Access-Stratum (NAS) protocol for EPS

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Rapporteur:  Ms. Liu, Jennifer
See also:  EPC-related TS/TRTS 24.501 (NAS for 5GS)

This TS specifies the procedures used by the protocols for mobility management and session management between UE and MME in the EPS. These protocols belong to the non-access stratum (NAS).

The EPS Mobility Management (EMM) protocol provides procedures for the control of mobility when the UE is using the E-UTRAN. The EMM protocol also provides control of security for the NAS protocols. The EPS Session Management (ESM) protocol provides procedures for the handling of EPS bearer contexts. Together with the bearer control provided by the access stratum, this protocol is used for the control of user plane bearers.