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TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
Isolated Evolved Universal Terrestrial
Radio Access Network (E-UTRAN) operation for public safety;
Stage 1
(3GPP TS 22.346 version 15.0.0 Release 15)
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3GPP TS 22.346 version 15.0.0 Release 15 1 ETSI TS 122 346 V15.0.0 (2018-07)
Reference
RTS/TSGS-0122346vf00
Keywords
LTE,UMTS
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3GPP TS 22.346 version 15.0.0 Release 15 2 ETSI TS 122 346 V15.0.0 (2018-07)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
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Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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3GPP TS 22.346 version 15.0.0 Release 15 3 ETSI TS 122 346 V15.0.0 (2018-07)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 4
1 Scope . 5
2 References . 5
3 Definitions and abbreviations . 5
3.1 Definitions . 5
3.2 Abbreviations . 6
4 Overview . 7
4.1 Service description . 7
5 Service requirements . 8
5.1 General requirements . 8
5.2 Subscriber and service management requirements . 8
5.2.1 Introduction (informative) . 8
5.2.2 Requirements . 8
5.2.3 Interoperability with MCPTT . 8
5.3 Requirements for initiation of Isolated E-UTRAN operation . 9
5.3.1 Introduction (informative) . 9
5.3.2 Requirements . 9
5.4 Requirements for ongoing Isolated E-UTRAN operation . 10
5.4.1 Introduction (informative) . 10
5.4.2 Requirements . 10
5.5 Requirements for termination of an Isolated E-UTRAN . 10
5.5.1 Introduction (informative) . 10
5.5.2 Requirements . 10
5.6 Requirements for security aspects of Isolated E-UTRAN operation . 11
5.6.1 Introduction (informative) . 11
5.6.2 Requirements . 11
Annex A (informative): Change history . 12
History . 13
ETSI
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3GPP TS 22.346 version 15.0.0 Release 15 4 ETSI TS 122 346 V15.0.0 (2018-07)
Foreword
rd
This Technical Specification has been produced by the 3 Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
Y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
ETSI
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3GPP TS 22.346 version 15.0.0 Release 15 5 ETSI TS 122 346 V15.0.0 (2018-07)
1 Scope
The present document specifies the service requirements for Isolated E-UTRAN Operation in support of mission critical
network operation for Public Safety. In particular, requirements are specified for:
- Initiation of Isolated E-UTRAN operation.
- Ongoing Isolated E-UTRAN operation.
- Termination of Isolated E-UTRAN operation.
- Security aspects of Isolated E-UTRAN operation.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or
non-specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including
a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same
Release as the present document.
[1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 22.101: "Services aspects; Service principles".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in TR 21.905 [1] and the following apply. A
term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 [1].
Isolated E-UTRAN: either an E-UTRAN without normal connectivity with the EPC or deployed NeNBs with E-
UTRAN functionality.
Isolated E-UTRAN operation: Comprises two situations: 1) In the event of an interruption to normal backhaul
connectivity Isolated E-UTRAN operation aims to adapt to the failure and maintain an acceptable level of network
operation in the Isolated E-UTRAN. The restoration of service is the eventual goal. 2) Operation following the
deployment of one or more Nomadic eNBs either without backhaul or with limited backhaul.
Limited backhaul capability: Isolated E-UTRAN operation supports operation where the Isolated E-UTRAN has no
backhaul capability to the EPC. Furthermore Isolated E-UTRAN operation may have limited backhaul capability to the
EPC. For the case of limited backhaul capability to the EPC only the signalling of public safety Ues can reliably be
communicated to the EPC; in addition users may have the possibility to transmit a limited amount of user data with no
guarantee of service.
Nomadic eNB (NeNB): An NeNB is a nomadic cell and may consist: base station, antennas, microwave backhaul and
support for local services. The NeNB is intended for Public Safety use providing coverage or additional capacity where:
1) coverage was never present (e.g. forest fire or underground rescue) or 2) where, for example, due to natural disaster
coverage is no longer present.
ETSI
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3GPP TS 22.346 version 15.0.0 Release 15 6 ETSI TS 122 346 V15.0.0 (2018-07)
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in TR 21.905 [1] and the following apply. An
abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in
TR 21.905 [1].
NeNB Nomadic eNB
ETSI
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3GPP TS 22.346 version 15.0.0 Release 15 7 ETSI TS 122 346 V15.0.0 (2018-07)
4 Overview
4.1 Service description
Ensuring the continued ability of Public Safety users to communicate within mission critical situations is of the utmost
importance. The Isolated E-UTRAN mode of operation provides the ability to maintain a level of communications for
Public Safety users, via an eNB (or set of connected eNBs), following the loss of backhaul communications. The
Isolated E-UTRAN mode of operation also provides the ability to create a serving radio access network without
backhaul communications, from a deployment of one or more standalone Nomadic eNBs (NeNBs). In addition the
Isolated EUTRAN feature also addresses the scenario where a fixed or nomadic set of eNBs is without normal backhaul
communications but has been provided with an alternative (non-ideal) limited bandwidth backhaul.
An Isolated E-UTRAN may comprise a deployment of one or more NeNBs. In this case operator control would initiate
Isolated E-UTRAN operation for a group of NeNBs in a given incident area. An Isolated E-UTRAN derived from
NeNBs exhibits similar behaviour to an Isolated E-UTRAN derived from eNBs including: support for Public Safety
Ues in the coverage area, communication between NeNBs and support for limited backhaul connectivity.
The Isolated E-UTRAN may comprise a single or multiple eNBs, a single or multiple NeNBs, or a mixed group of
eNBs and NeNBs. An Isolated E-UTRAN comprising multiple (N)eNBs, with connections between the (N)eNBs, can
provide commun
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