ETSI TS 123 401 V13.14.0 (2020-01)

ETSI TS 123 401 V13.14.0 (2020-01)






TECHNICAL SPECIFICATION
LTE;
General Packet Radio Service (GPRS)
enhancements for Evolved Universal Terrestrial
Radio Access Network (E-UTRAN) access
(3GPP TS 23.401 version 13.14.0 Release 13)

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3GPP TS 23.401 version 13.14.0 Release 13 1 ETSI TS 123 401 V13.14.0 (2020-01)



Reference
RTS/TSGS-0223401vde0
Keywords
LTE
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3GPP TS 23.401 version 13.14.0 Release 13 2 ETSI TS 123 401 V13.14.0 (2020-01)
Intellectual Property Rights
Essential patents
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pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
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Legal Notice
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
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"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

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3GPP TS 23.401 version 13.14.0 Release 13 3 ETSI TS 123 401 V13.14.0 (2020-01)
Contents
Intellectual Property Rights . 2
Legal Notice . 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 . 16
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 . 23
4.3.2.1 General . 23
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 . 25
4.3.3.4 IP Multicast Forwarding between a network accessed by LIPA and a UE . 25
4.3.4 Security functions . 25
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 . 27
4.3.5.5 Inter-3GPP mobility anchor function . 27
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. 33
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 . 36
4.3.7.4.1 General . 36
ETSI

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3GPP TS 23.401 version 13.14.0 Release 13 4 ETSI TS 123 401 V13.14.0 (2020-01)
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 . 38
4.3.7.5 PDN GW control of overload. 42
4.3.8 Selection functions . 42
4.3.8.1 PDN GW selection function (3GPP accesses) . 42
4.3.8.2 Serving GW selection function . 44
4.3.8.3 MME selection function . 45
4.3.8.4 SGSN selection function . 46
4.3.8.5 Selection of PCRF . 46
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 . 47
4.3.12 IMS Emergency Session Support . 48
4.3.12.1 Introduction . 48
4.3.12.2 Architecture Reference Model for Emergency Services . 49
4.3.12.3 Mobility and Access Restrictions for Emergency Services . 49
4.3.12.3a Reachability Management for UE in ECM-IDLE state. 49
4.3.12.4 PDN GW selection function (3GPP accesses) for Emergency Services . 50
4.3.12.5 QoS for Emergency Services . 50
4.3.12.6 PCC for Emergency Services . 50
4.3.12.7 Load re-balancing between MMEs for Emergency Services . 50
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 . 51
4.3.13 Closed Subscriber Group functions . 51
4.3.14 Location Service functions . 51
4.3.15 Selected IP Traffic Offload (SIPTO) function . 52
4.3.15a Selected IP Traffic Offload (SIPTO) at the Local Network . 52
4.3.15a.1 General . 52
4.3.15a.2 SIPTO at the Local Network with stand-alone GW (with S-GW and L-GW collocated) function . 53
4.3.15a.3 SIPTO at the Local Network with L-GW function collocated with the (H)eNB . 54
4.3.16 Local IP Access (LIPA) function . 54
4.3.17 Support for Machine Type Communications (MTC) . 55
4.3.17.1 General . 55
4.3.17.2 Overview of protection from Potential MTC Related Overload . 55
4.3.17.3 Optimizing periodic TAU Signalling . 57
4.3.17.4 UE configuration and usage of indicators . 57
4.3.17.5 Void. 59
4.3.17.6 Support of UEs configured for low access priority, Extended Access Barring and permission for
override . 59
4.3.17.7 High latency communication . 59
4.3.17.8 Support for Non-IP Data Delivery (NIDD) . 60
4.3.17.8.1 General . 60
4.3.17.8.2 ESM Procedures . 60
4.3.17.8.3 Delivery mechanism . 60
4.3.18 Multimedia Priority Service . 62
4.3.18.1 General . 62
4.3.18.2 IMS-based Multimedia Priority Services . 63
4.3.18.2.1 Originating IMS-based MPS Session . 63
4.3.18.2.2 Terminating IMS-based MPS Session . 63
4.3.18.3 Priority EPS Bearer Services. 63
4.3.18.4 CS fallback . 64
4.3.18.5 Network Congestion Controls for MPS . 64
4.3.18.6 Load Re-balancing between MMEs for MPS . 64
4.3.19 Core Network node resolution . 64
4.3.19.1 General . 64
4.3.19.2 MSB in LAC and MME Group ID . 64
4.3.19.3 Explicit Indication . 64
ETSI

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3GPP TS 23.401 version 13.14.0 Release 13 5 ETSI TS 123 401 V13.14.0 (2020-01)
4.3.20 Relaying function . 65
4.3.20.1 General . 65
4.3.20.2 RN startup and attach procedure . 65
4.3.20.2.1 General . 65
4.3.20.2.2 Attach for RN preconfiguration . 66
4.3.20.2.3 Attach for RN operation . 66
4.3.20.3 DeNB E-RAB activation/modification . 67
4.3.21 Core Network assisted eNodeB parameters tuning . 68
4.3.21.1 CN Assistance Information . 68
4.3.21.2 Void. 68
4.3.21.3 Core Network Assistance Procedures . 68
4.3.22 UE Power Saving Mode . 69
4.3.23 Access network selection and traffic steering based on RAN-assisted WLAN interworking . 70
4.3.23a Access network selection and traffic steering based on RAN-Controlled WLAN interworking . 71
4.3.24 RAN user plane congestion management function . 71
4.3.24.1 General . 71
4.3.24.2 RAN user plane congestion mitigation in the RAN . 71
4.3.24.3 RAN user plane congestion mitigation in the CN . 71
4.3.25 Dedicated Core Networks (DCNs) . 72
4.3.25.1 General . 72
4.3.25.2 Considerations for Roaming. 73
4.3.25.3 Considerations for Network Sharing . 73
4.3.26 Support for Monitoring Events . 74
4.3.27 Paging Enhancements . 74
4.3.27.1 Paging for Enhanced Coverage . 74
4.3.27a Restriction of use of Enhanced Coverage for voice centric UE . 74
4.4 Network elements . 74
4.4.1 E-UTRAN . 74
4.4.2 MME . 74
4.4.3 Gateway . 75
4.4.3.1 General . 75
4.4.3.2 Serving GW. 76
4.4.3.3 PDN GW . 76
4.4.4 SGSN . 77
4.4.5 GERAN . 77
4.4.6 UTRAN . 78
4.4.7 PCRF . 78
4.4.7.1 General . 78
4.4.7.2 Home PCRF (H-PCRF). 78
4.4.7.3 Visited PCRF (V-PCRF) . 78
4.4.8 PDN GW's associated AAA Server . 78
4.4.9 HeNB subsystem . 78
4.4.10 DeNB . 79
4.4.11 CSG Subscriber Server . 80
4.4.12 RAN Congestion Awareness Function . 80
4.5 Void .
...