ETSI TS 123 401 V14.10.0 (2018-12)

LTE; General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access (3GPP TS 23.401 version 14.10.0 Release 14)

RTS/TSGS-0223401vea0

General Information

• Status: Published
• Publication Date: 19-Dec-2018
• Technical Committee: 3GPP SA 2 - Architecture
• Current Stage: 12 - Completion
• Completion Date: 20-Dec-2018

Standards Content (Sample)

ETSI TS 123 401 V14.10.0 (2018-12)






TECHNICAL SPECIFICATION
LTE;
General Packet Radio Service (GPRS)
enhancements for Evolved Universal Terrestrial
Radio Access Network (E-UTRAN) access
(3GPP TS 23.401 version 14.10.0 Release 14)

---------------------- Page: 1 ----------------------
3GPP TS 23.401 version 14.10.0 Release 14 1 ETSI TS 123 401 V14.10.0 (2018-12)



Reference
RTS/TSGS-0223401vea0
Keywords
LTE
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2018.
All rights reserved.

TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.
TM TM
3GPP and LTE are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and
of the oneM2M Partners
®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI

---------------------- Page: 2 ----------------------
3GPP TS 23.401 version 14.10.0 Release 14 2 ETSI TS 123 401 V14.10.0 (2018-12)
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
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
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
http://webapp.etsi.org/key/queryform.asp.
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

---------------------- Page: 3 ----------------------
3GPP TS 23.401 version 14.10.0 Release 14 3 ETSI TS 123 401 V14.10.0 (2018-12)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 11
1 Scope . 12
2 References . 12
3 Definitions and abbreviations . 15
3.1 Definitions . 15
3.2 Abbreviations . 17
4 Architecture model and concepts . 18
4.1 General concepts . 18
4.2 Architecture reference model . 18
4.2.1 Non-roaming architecture . 18
4.2.2 Roaming architecture . 19
4.2.3 Reference points . 21
4.2.4 Warning System architecture . 22
4.3 High level functions . 22
4.3.1 General . 22
4.3.2 Network access control functions . 22
4.3.2.1 General . 22
4.3.2.2 Network/Access network selection . 23
4.3.2.3 Authentication and authorisation function . 23
4.3.2.4 Admission control function . 23
4.3.2.5 Policy and Charging Enforcement Function . 23
4.3.2.6 Lawful Interception . 23
4.3.2a Support for Dual Connectivity . 23
4.3.3 Packet routing and transfer functions. 24
4.3.3.1 General . 24
4.3.3.2 IP header compression function . 24
4.3.3.3 Packet screening function . 24
4.3.3.4 IP Multicast Forwarding between a network accessed by LIPA and a UE . 24
4.3.4 Security functions . 24
4.3.5 Mobility management functions . 25
4.3.5.1 General . 25
4.3.5.2 Reachability Management for UE in ECM-IDLE state. 25
4.3.5.3 Tracking Area list management . 26
4.3.5.4 Inter-eNodeB mobility anchor function . 26
4.3.5.5 Inter-3GPP mobility anchor function . 26
4.3.5.6 Idle mode signalling reduction function . 27
4.3.5.7 Mobility Restrictions . 29
4.3.5.8 IMS voice over PS Session Supported Indication . 29
4.3.5.8A Homogenous Support of IMS Voice over PS Sessions Indication . 29
4.3.5.9 Voice domain preference and UE's usage setting. 30
4.3.5.10 Preferred and Supported Network Behaviour . 30
4.3.6 Radio Resource Management functions . 31
4.3.7 Network management functions . 32
4.3.7.1 General . 32
4.3.7.1a GTP-C signalling based Load and Overload Control . 32
4.3.7.1a.1 GTP-C Load Control . 32
4.3.7.1a.2 GTP-C Overload Control. 32
4.3.7.2 Load balancing between MMEs . 34
4.3.7.3 Load re-balancing between MMEs . 34
4.3.7.4 MME control of overload . 35
4.3.7.4.1 General . 35
ETSI

---------------------- Page: 4 ----------------------
3GPP TS 23.401 version 14.10.0 Release 14 4 ETSI TS 123 401 V14.10.0 (2018-12)
4.3.7.4.1a Throttling of Downlink Data Notification Requests . 37
4.3.7.4.1b Throttling of NIDD Submit Requests . 37
4.3.7.4.2 NAS level congestion control . 37
4.3.7.5 PDN GW control of overload. 43
4.3.8 Selection functions . 43
4.3.8.1 PDN GW selection function (3GPP accesses) . 43
4.3.8.2 Serving GW selection function . 45
4.3.8.3 MME selection function . 46
4.3.8.4 SGSN selection function . 47
4.3.8.5 Selection of PCRF . 47
4.3.9 IP network related functions . 47
4.3.9.1 Domain Name Service function . 47
4.3.9.2 DHCP function . 47
4.3.9.3 Explicit Congestion Notification . 47
4.3.10 Functionality for Connection of eNodeBs to Multiple MMEs. 47
4.3.11 E-UTRAN Sharing Function . 48
4.3.12 IMS Emergency Session Support . 48
4.3.12.1 Introduction . 48
4.3.12.2 Architecture Reference Model for Emergency Services . 50
4.3.12.3 Mobility and Access Restrictions for Emergency Services . 50
4.3.12.3a Reachability Management for UE in ECM-IDLE state. 50
4.3.12.4 PDN GW selection function (3GPP accesses) for Emergency Services . 50
4.3.12.5 QoS for Emergency Services . 51
4.3.12.6 PCC for Emergency Services . 51
4.3.12.7 Load re-balancing between MMEs for Emergency Services . 51
4.3.12.8 IP Address Allocation . 51
4.3.12.9 Handling of PDN Connections for Emergency Bearer Services . 51
4.3.12.10 ISR function for Emergency Bearer Services . 52
4.3.12.11 Support of eCall Only Mode . 52
4.3.13 Closed Subscriber Group functions . 52
4.3.14 Location Service functions . 53
4.3.15 Selected IP Traffic Offload (SIPTO) function . 53
4.3.15a Selected IP Traffic Offload (SIPTO) at the Local Network . 54
4.3.15a.1 General . 54
4.3.15a.2 SIPTO at the Local Network with stand-alone GW (with S-GW and L-GW collocated) function . 54
4.3.15a.3 SIPTO at the Local Network with L-GW function collocated with the (H)eNB . 55
4.3.16 Local IP Access (LIPA) function . 55
4.3.17 Support for Machine Type Communications (MTC) . 56
4.3.17.1 General . 56
4.3.17.2 Overview of protection from Potential MTC Related Overload . 57
4.3.17.3 Optimizing periodic TAU Signalling . 58
4.3.17.4 UE configuration and usage of indicators . 58
4.3.17.5 Void. 60
4.3.17.6 Support of UEs configured for low access priority, Extended Access Barring and permission for
override . 60
4.3.17.7 High latency communication . 60
4.3.17.8 Support for Non-IP Data Delivery (NIDD) . 61
4.3.17.8.1 General . 61
4.3.17.8.2 ESM Procedures . 61
4.3.17.8.3 Delivery mechanism . 61
4.3.18 Multimedia Priority Service . 63
4.3.18.1 General . 63
4.3.18.2 IMS-based Multimedia Priority Services . 64
4.3.18.2.1 Originating IMS-based MPS Session . 64
4.3.18.2.2 Terminating IMS-based MPS Session . 64
4.3.18.3 Priority EPS Bearer Services. 64
4.3.18.4 CS fallback . 65
4.3.18.5 Network Congestion Controls for MPS . 65
4.3.18.6 Load Re-balancing between MMEs for MPS . 65
4.3.19 Core Network node resolution . 65
4.3.19.1 General . 65
4.3.19.2 MSB in LAC and MME Group ID . 65
ETSI

---------------------- Page: 5 ----------------------
3GPP TS 23.401 version 14.10.0 Release 14 5 ETSI TS 123 401 V14.10.0 (2018-12)
4.3.19.3 Explicit Indication . 65
4.3.20 Relaying function . 66
4.3.20.1 General . 66
4.3.20.2 RN startup and attach procedure . 66
4.3.20.2.1 General . 66
4.3.20.2.2 Attach for RN preconfiguration . 67
4.3.20.2.3 Attach for RN operation . 67
4.3.20.3 DeNB E-RAB activation/modification . 68
4.3.21 Core Network assisted eNodeB parameters tuning . 69
4.3.21.1 CN Assistance Information . 69
4.3.21.2 Void. 69
4.3.21.3 Core Network Assistance Procedures . 69
4.3.22 UE Power Saving Mode . 70
4.3.23 Access network selection and traffic steering based on RAN-assisted WLAN interworking . 71
4.3.23a Access network selection and traffic steering based on RAN-Controlled WLAN interworking . 72
4.3.24 RAN user plane congestion management function . 72
4.3.24.1 General . 72
4.3.24.2 RAN user plane congestion mitigation in the RAN . 72
4.3.24.3 RAN user plane congestion mitigation in the CN . 72
4.3.25 Dedicated Core Networks (DCNs) . 73
4.3.25.1 General . 73
4.3.25.1a UE assisted Dedicated Core Network selection . 74
4.3.25.2 Considerations for Roaming. 74
4.3.25.3 Considerations for Network Sharing . 75
4.3.26 Support for Monitoring Events . 75
4.3.27 Paging Enhancements . 75
4.3.27.1 Paging for Enhanced Coverage . 75
4.3.27a Restriction of use of Enhanced Coverage for voice centric UE . 75
4.3.27b Enhanced Coverage for data centric UEs . 76
4.3.28 Restriction of use of Enhanced Coverage . 76
4.3.29 3GPP PS Data Off . 76
4.3.29.1 General . 76
4.4 Network elements . 77
4.4.1 E-UTRAN . 77
4.4.2 MME . 77
4.4.3 Gateway . 78
4.4.3.1 General . 78
4.4.3.2 Serving GW. 78
4.4.3.3 PDN GW . 79
4.4.4 SGSN . 80
4.4.5 GERAN . 80
4.4.6 UTRAN . 80
4.4.7 PCRF . 80
4.4.7.1 General . 80
4.4.7.2 Home PCRF (H-PCRF). 81
4.4.7.3 V
...