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TS 23.401SA2
GPRS enhancements for E‑UTRAN Access

use "3GPP‑Page" to get the Word version
use "ETSI‑search" to get the PDF version
for a better overview, the Table of Contents (ToC) is reproduced
V16.6.0 (Wzip)2020/03  436 p.
V15.10.0 (PDF)  2019/12  419 p.
V14.11.0  2019/12  402 p.
V13.14.0  2019/12  386 p.
V12.11.0  2016/03  312 p.
V11.11.0  2014/12  289 p.
V10.13.0  2014/12  280 p.
V9.16.0  2014/12  258 p.
V8.18.0  2013/03  240 p.

WI Acronym:  SAES-St2
Rapporteur:  Mr. Pudney, ChrisVODAFONE Group Plc

This TS defines the Stage 2 service description for the Evolved Packet System (EPS). The specification covers both roaming and non-roaming scenarios and covers all aspects, including mobility between E‑UTRAN and pre‑E‑UTRAN 3GPP radio access technologies, policy control and charging, and authentication.
Click here to see a gradual view of Rel‑8 EPC architecture
3GPP 23.401 - Evolved Packet System (EPS)
Here are some links in support of this figure:
S1‑MMES1‑US3

essential Table of Contents for  TS 23.401  Word version:   16.6.0

each title links to the equivalent title in the full ToC
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1  ScopeWord-p. 13
2  ReferencesWord-p. 13
3  Definitions and abbreviationsWord-p. 17
4  Architecture model and conceptsWord-p. 20
4.1  General conceptsWord-p. 20
4.2  Architecture reference modelWord-p. 20
4.3  High level functionsWord-p. 25
4.3.1  GeneralWord-p. 25
4.3.2  Network access control functionsWord-p. 25
4.3.2a  Support for Dual Connectivity [R12]Word-p. 26
4.3.3  Packet routing and transfer functionsWord-p. 28
4.3.4  Security functionsWord-p. 28
4.3.5  Mobility management functionsWord-p. 28
4.3.6  Radio Resource Management functionsWord-p. 35
4.3.7  Network management functionsWord-p. 36
4.3.8  Selection functionsWord-p. 47
4.3.9  IP network related functionsWord-p. 52
4.3.10  Functionality for Connection of eNodeBs to Multiple MMEsWord-p. 52
4.3.11  E-UTRAN Sharing FunctionWord-p. 52
4.3.12  IMS Emergency Session Support [R9]Word-p. 53
4.3.12a  Support of Restricted Local Operator Service [R16]Word-p. 57
4.3.13  Closed Subscriber Group functions [R9]Word-p. 59
4.3.14  Location Service functions [R9]UpWord-p. 59
4.3.15  Selected IP Traffic Offload (SIPTO) function [R10]Word-p. 59
4.3.15a  Selected IP Traffic Offload (SIPTO) at the Local Network [R12]Word-p. 60
4.3.16  Local IP Access (LIPA) function [R10]Word-p. 62
4.3.17  Support for Machine Type Communications (MTC) [R10]Word-p. 63
4.3.18  Multimedia Priority Service [R10]Word-p. 72
4.3.19  Core Network node resolution [R10]Word-p. 74
4.3.20  Relaying function [R10]Word-p. 75
4.3.21  Core Network assisted eNodeB parameters tuning [R12]Word-p. 78
4.3.22  UE Power Saving Mode [R12]Word-p. 80
4.3.23  Access network selection and traffic steering based on RAN-assisted WLAN interworking [R12]Word-p. 80
4.3.23a  Access network selection and traffic steering based on RAN-Controlled WLAN interworking [R13]Word-p. 81
4.3.24  RAN user plane congestion management function [R13]Word-p. 81
4.3.25  Dedicated Core Networks (DCNs) [R13]Word-p. 82
4.3.26  Support for Monitoring Events [R13]Word-p. 85
4.3.27  Paging Enhancements [R13]Word-p. 85
4.3.27a  Restriction of use of Enhanced Coverage for voice centric UE [R13]Word-p. 85
4.3.27b  Enhanced Coverage for data centric UEs [R14]UpWord-p. 85
4.3.28  Restriction of use of Enhanced Coverage [R14]Word-p. 85
4.3.29  3GPP PS Data Off [R14]Word-p. 86
4.3.30  Unlicensed spectrum aggregation (LAA/LWA/LWIP/NR-U) [R15]Word-p. 87
4.3.31  Subscription handling for Aerial UEs [R15]Word-p. 87
4.3.32  Support for Integrated access and backhaul (IAB) [R16]Word-p. 87
4.4  Network elementsWord-p. 89
4.5Void
4.6  EPS Mobility Management and Connection Management statesWord-p. 97
4.7  Overall QoS conceptWord-p. 100
4.8  Compatibility IssuesWord-p. 110
4.9  Paging Policy Differentiation [R13]Word-p. 110
4.10  Introduction of CIoT EPS Optimisations [R13]Word-p. 110
4.11  User Plane CIoT EPS Optimisation [R13]Word-p. 111
4.12  Supporting up to 15 EPS bearers per UE [R15]Word-p. 112
5  Functional description and information flowsWord-p. 113
5.1  Control and user planesWord-p. 113
5.2  IdentitiesWord-p. 123
5.3  Authentication, security and location managementWord-p. 125
5.3.1  IP address allocationWord-p. 125
5.3.2  Attach procedureWord-p. 130
5.3.3  Tracking Area Update proceduresWord-p. 146
5.3.4  Service Request proceduresWord-p. 185
5.3.4A  Connection Suspend procedure [R13]Word-p. 195
5.3.4B  Data Transport in Control Plane CIoT EPS Optimisation [R13]Word-p. 196
5.3.5  S1 release procedureWord-p. 208
5.3.5A  Connection Resume procedure [R13]Word-p. 211
5.3.5B  MT-EDT procedure for User Plane CIoT EPS Optimisation [R16]Word-p. 213
5.3.6Void
5.3.6A  PDN GW Pause of Charging procedure [R12]Word-p. 213
5.3.7  GUTI Reallocation procedureWord-p. 215
5.3.8  Detach procedureWord-p. 216
5.3.9  HSS User Profile management function procedureWord-p. 225
5.3.10  Security FunctionWord-p. 227
5.3.11  UE Reachability proceduresWord-p. 229
5.3.12  Update CSG Location Procedure [R11]Word-p. 230
5.3.13  CSS subscription data management function procedure [R11]Word-p. 230
5.3.14  UE Radio Capability Match Request [R11]Word-p. 231
5.4  Session Management, QoS and interaction with PCC functionalityWord-p. 232
5.5  HandoverWord-p. 251
5.5.1  Intra-E-UTRAN handoverWord-p. 251
5.5.2  Inter RAT handoverWord-p. 267
5.6  Network Assisted Cell ChangeWord-p. 300
5.7  Information storageWord-p. 301
5.7A  ChargingWord-p. 320
5.8  MBMSWord-p. 323
5.9  Interactions with other servicesWord-p. 323
5.10  Multiple-PDN support and PDN activation for UEs supporting "Attach without PDN connectivity"Word-p. 328
5.11  UE Capability HandlingWord-p. 341
5.12  Warning message deliveryWord-p. 348
5.13  Discontinuous Reception and UE Specific DRX Parameter handlingWord-p. 348
5.13a  Extended Idle mode Discontinuous Reception (DRX) [R13]Word-p. 349
5.14  Configuration Transfer procedureWord-p. 350
5.15  RAN Information Management (RIM) procedures [R9]Word-p. 352
5.16  MME-initiated procedure on UE's CSG membership change [R9]Word-p. 353
5.17  Home eNodeB Multicast Packet Forwarding Function [R10]UpWord-p. 353
5.18  HPLMN Notification with specific indication due to MME initiated Bearer removal [R11]Word-p. 354
5.19  Procedures to support Dedicated Core Networks [R13]Word-p. 354
AVoid
BVoid
CVoid
D (Normative)  Interoperation with Gn/Gp SGSNsWord-p. 364
E (Normative)  Mapping between EPS and Release 99 QoS parametersWord-p. 402
F (Normative)  Dedicated bearer activation in combination with the default bearer activation at Attach and UE requested PDN connectivity proceduresWord-p. 405
GVoid
H (Normative)  Mapping between temporary and area identitiesWord-p. 409
I  Guidance for contributors to this specificationWord-p. 410
J  High Level ISR descriptionWord-p. 411
K  Isolated E-UTRAN Operation for Public Safety [R13]Word-p. 416
L  Optimised EPS Architecture option for CIoT [R13]Word-p. 422
M  Functions and procedures over NB-IoT RAT [R13]Word-p. 424
N  Change historyWord-p. 428

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