ETSI
ETSI TS 124 301 V9.11.0 (2013
3GPP TS 24.301 version 9.11.0 Release 9
EMM-CONNECTED mode: A UE is in EMM-CONNECTED mode when a NAS signalling connection between UE
and network is established. The term EMM-CONNECTED mode used in the present document corresponds to the term
ECM-CONNECTED state used in 3GPP TS 23.401 [10].
EMM-IDLE mode: A UE is in EMM-IDLE mode when no NAS signalling connection between UE and network
exists. The term EMM-IDLE mode used in the present document corresponds to the term ECM-IDLE state used in
3GPP TS 23.401 [10].
EPS security context: In the present specification, EPS security context is used as a synonym for EPS NAS security
context specified in 3GPP TS 33.401 [19].
EPS services: Within the context of this specification, EPS services is used as a synonym for GPRS services in
3GPP TS 24.008 [13].
Evolved packet core network: the successor to the 3GPP Release 7 packet-switched core network, developed by 3GPP
within the framework of the 3GPP System Architecture Evolution (SAE).
Evolved packet system: The evolved packet system (EPS) or evolved 3GPP packet-switched domain consists of the
evolved packet core network and the evolved universal terrestrial radio access network. Definition derived from
3GPP TS 23.401 [10].
GBR bearer: An EPS bearer that uses dedicated network resources related to a guaranteed bit rate (GBR) value, which
are permanently allocated at EPS bearer establishment/modification. Definition derived from 3GPP TS 23.401 [10].
Initial NAS message: A NAS message is considered as an initial NAS message, if this NAS message can trigger the
establishment of a NAS signalling connection. For instance, the ATTACH REQUEST message is an initial NAS
message.
IPv4v6 capability: capability of the IP stack associated with a UE to support a dual stack configuration with both an
IPv4 address and an IPv6 address allocated.
Kilobit: 1000 bits.
Last Visited Registered TAI: A TAI which is contained in the TAI list that the UE registered to the network and
which identifies the tracking area last visited by the UE.
Linked Bearer Identity: This identity indicates to which default bearer the additional bearer resource is linked.
Mapped EPS security context: a mapped security context to be used in EPS. Definition derived from
3GPP TS 33.401 [19].
Megabit: 1,000,000 bits.
Message header: a standard L3 message header as defined in 3GPP TS 24.007 [12].
MME area: An area containing tracking areas served by an MME.
NAS signalling connection: is a peer to peer S1 mode connection between UE and MME. A NAS signalling
connection consists of the concatenation of an RRC connection via the "LTE-Uu" interface and an S1AP connection via
the S1 interface. Additionally, for the purpose of optimized handover or idle mode mobility from cdma2000
®
HRPD
access to E-UTRAN (see 3GPP TS 23.402 [11]), the NAS signalling connection can consist of a concatenation of an
S101-AP connection and a signalling tunnel over a cdma2000
®
HRPD access network.
NOTE: cdma2000
®
is a registered trademark of the Telecommunications Industry Association (TIA-USA).
NAS signalling connection recovery: is a mechanism initiated by the NAS to restore the NAS signalling connection on
indication of "RRC connection failure" by the lower layers.
Non-access stratum protocols: The protocols between UE and MSC or SGSN that are not terminated in the UTRAN,
and the protocols between UE and MME that are not terminated in the E-UTRAN. Definition derived from
3GPP TS 21.905 [1].
Non-emergency EPS bearer context: any EPS bearer context which is not an emergency EPS bearer context.
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