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4G核心网LTE信令流程-23401-850
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更新于2023-03-16
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本文详细介绍4G核心网LTE信令流程,对于从事4G网络协议开发者可以参考。
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3GPP TS 23.401 V8.5.0 (2009-03)
Technical Specification
3rd Generation Partnership Project;
Technical Specification Group Services and System Aspects;
General Packet Radio Service (GPRS) enhancements fo
r
Evolved Universal Terrestrial Radio Access Network
(E-UTRAN) access
(Release 8)
The present document has been developed within the 3
rd
Generation Partnership Project (3GPP
TM
) and may be further elaborated for the purposes of 3GPP.
The present document has not been subject to any approval process by the 3GPP
Organizational Partners and shall not be implemented.
This Specification is provided for future development work within 3GPP
only. The Organizational Partners accept no liability for any use of this Specification.
Specifications and reports for implementation of the 3GPP
TM
system should be obtained via the 3GPP Organizational Partners' Publications Offices.
3GPP TS 23.401 V8.5.0 (2009-03)2Release 8
Keywords
LTE, GSM, UMTS, GPRS, architecture, stage 2
3GPP
Postal address
3GPP support office address
650 Route des Lucioles - Sophia Antipolis
Valbonne - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Internet
http://www.3gpp.org
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.
© 2009, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC).
All rights reserved.
UMTS™ is a Trade Mark of ETSI registered for the benefit of its members
3GPP™ is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners
LTE™ is a Trade Mark of ETSI currently being registered for the benefit of its Members and of the 3GPP Organizational Partners
GSM® and the GSM logo are registered and owned by the GSM Association
3GPP
3GPP TS 23.401 V8.5.0 (2009-03)3Release 8
3GPP
Contents
Foreword ............................................................................................................................................................8
1 Scope........................................................................................................................................................9
2 References................................................................................................................................................9
3 Definitions and abbreviations.................................................................................................................11
3.1 Definitions ....................................................................................................................................................... 11
3.2 Abbreviations................................................................................................................................................... 11
4 Architecture model and concepts ...........................................................................................................13
4.1 General concepts.............................................................................................................................................. 13
4.2 Architecture reference model........................................................................................................................... 13
4.2.1 Non-roaming architecture .......................................................................................................................... 13
4.2.2 Roaming architecture ................................................................................................................................. 14
4.2.3 Reference points......................................................................................................................................... 16
4.2.4 Warning System architecture ..................................................................................................................... 17
4.3 High level functions......................................................................................................................................... 17
4.3.1 General....................................................................................................................................................... 17
4.3.2 Network access control functions............................................................................................................... 18
4.3.2.1 General ................................................................................................................................................. 18
4.3.2.2 Network/Access network selection....................................................................................................... 18
4.3.2.3 Authentication and authorisation function............................................................................................18
4.3.2.4 Admission control function .................................................................................................................. 18
4.3.2.5 Policy and Charging Enforcement Function......................................................................................... 18
4.3.2.6 Lawful Interception .............................................................................................................................. 18
4.3.3 Packet routeing and transfer functions ....................................................................................................... 18
4.3.3.1 General ................................................................................................................................................. 18
4.3.3.2 IP header compression function............................................................................................................ 18
4.3.3.3 Packet screening function..................................................................................................................... 19
4.3.4 Security functions....................................................................................................................................... 19
4.3.4.1 Ciphering function................................................................................................................................ 19
4.3.4.2 Integrity protection function................................................................................................................. 19
4.3.5 Mobility management functions................................................................................................................. 19
4.3.5.1 General ................................................................................................................................................. 19
4.3.5.2 Reachability Management for UE in ECM-IDLE state........................................................................ 19
4.3.5.3 Tracking Area list management............................................................................................................ 20
4.3.5.4 Inter-eNodeB mobility anchor function................................................................................................ 20
4.3.5.5 Inter-3GPP mobility anchor function ................................................................................................... 20
4.3.5.6 Idle mode signalling reduction function............................................................................................... 20
4.3.5.7 Mobility Restrictions............................................................................................................................ 21
4.3.6 Radio Resource Management functions..................................................................................................... 22
4.3.7 Network management functions................................................................................................................. 22
4.3.7.1 General ................................................................................................................................................. 22
4.3.7.2 Load balancing between MMEs........................................................................................................... 22
4.3.7.3 Load re-balancing between MMEs....................................................................................................... 22
4.3.7.4 MME control of overload..................................................................................................................... 23
4.3.8 Selection functions..................................................................................................................................... 24
4.3.8.1 PDN GW selection function (3GPP accesses)...................................................................................... 24
4.3.8.2 Serving GW selection function............................................................................................................. 25
4.3.8.3 MME selection function....................................................................................................................... 25
4.3.8.4 SGSN selection function ...................................................................................................................... 25
4.3.8.5 Selection of PCRF ................................................................................................................................ 26
4.3.9 IP network related functions ...................................................................................................................... 26
4.3.9.1 Domain Name Service function............................................................................................................ 26
4.3.9.2 DHCP function..................................................................................................................................... 26
4.3.10 Functionality for Connection of eNodeBs to Multiple MMEs................................................................... 26
4.3.11 E-UTRAN Sharing Function...................................................................................................................... 26
4.4 Network elements ............................................................................................................................................ 27
3GPP TS 23.401 V8.5.0 (2009-03)4Release 8
3GPP
4.4.1 E-UTRAN.................................................................................................................................................. 27
4.4.2 MME.......................................................................................................................................................... 27
4.4.3 Gateway ..................................................................................................................................................... 27
4.4.3.1 General ................................................................................................................................................. 27
4.4.3.2 Serving GW.......................................................................................................................................... 28
4.4.3.3 PDN GW .............................................................................................................................................. 28
4.4.4 SGSN ......................................................................................................................................................... 29
4.4.5 GERAN...................................................................................................................................................... 29
4.4.6 UTRAN...................................................................................................................................................... 29
4.4.7 PCRF.......................................................................................................................................................... 29
4.4.7.1 General ................................................................................................................................................. 29
4.4.7.2 Home PCRF (H-PCRF)........................................................................................................................ 30
4.4.7.3 Visited PCRF (V-PCRF)...................................................................................................................... 30
4.4.8 PDN GW's associated AAA Server............................................................................................................ 30
4.5 Void ................................................................................................................................................................. 30
4.6 EPS Mobility Management and Connection Management states .................................................................... 30
4.6.1 General....................................................................................................................................................... 30
4.6.2 Definition of main EPS Mobility Management states................................................................................ 31
4.6.2.1 EMM-DEREGISTERED...................................................................................................................... 31
4.6.2.2 EMM-REGISTERED........................................................................................................................... 31
4.6.3 Definition of EPS Connection Management states .................................................................................... 31
4.6.3.1 ECM-IDLE........................................................................................................................................... 31
4.6.3.2 ECM-CONNECTED............................................................................................................................ 32
4.6.4 State transition and functions..................................................................................................................... 33
4.7 Overall QoS concept........................................................................................................................................ 34
4.7.1 PDN connectivity service........................................................................................................................... 34
4.7.2 The EPS bearer........................................................................................................................................... 34
4.7.2.1 The EPS bearer in general.................................................................................................................... 34
4.7.2.2 The EPS bearer with GTP-based S5/S8................................................................................................ 36
4.7.2.3 The EPS bearer with PMIP-based S5/S8.............................................................................................. 37
4.7.3 Bearer level QoS parameters...................................................................................................................... 37
4.7.4 Support for Application / Service Layer Rate Adaptation.......................................................................... 38
4.7.5 Application of PCC in the Evolved Packet System.................................................................................... 38
5 Functional description and information flows........................................................................................39
5.1 Control and user planes.................................................................................................................................... 39
5.1.1 Control Plane.............................................................................................................................................. 39
5.1.1.1 General ................................................................................................................................................. 39
5.1.1.2 eNodeB - MME.................................................................................................................................... 40
5.1.1.3 UE - MME............................................................................................................................................ 40
5.1.1.4 SGSN - MME....................................................................................................................................... 41
5.1.1.5 SGSN - S-GW ...................................................................................................................................... 41
5.1.1.6 S-GW - P-GW ...................................................................................................................................... 42
5.1.1.7 MME - MME........................................................................................................................................ 42
5.1.1.8 MME - S-GW....................................................................................................................................... 43
5.1.1.9 MME - HSS.......................................................................................................................................... 43
5.1.1.10 MME - EIR........................................................................................................................................... 44
5.1.1.11 CBC - eNodeB...................................................................................................................................... 44
5.1.2 User Plane .................................................................................................................................................. 45
5.1.2.1 UE - P-GW user plane with E-UTRAN................................................................................................ 45
5.1.2.2 eNodeB - S-GW ................................................................................................................................... 45
5.1.2.3 UE - PDN GW user plane with 2G access via the S4 interface............................................................ 46
5.1.2.4 UE - PDN GW user plane with 3G access via the S12 interface.......................................................... 47
5.1.2.5 UE - PDN GW user plane with 3G access via the S4 interface............................................................ 48
5.2 Identities .......................................................................................................................................................... 48
5.2.1 EPS bearer identity..................................................................................................................................... 48
5.2.2 Globally Unique Temporary UE Identity................................................................................................... 48
5.2.3 Tracking Area Identity (TAI)..................................................................................................................... 49
5.2.4 eNodeB S1-AP UE Identity (eNB S1-AP UE ID) ..................................................................................... 49
5.2.5 MME S1-AP UE Identity (MME S1-AP UE ID)....................................................................................... 49
5.3 Authentication, security and location management ......................................................................................... 49
5.3.1 IP address allocation .................................................................................................................................. 49
3GPP TS 23.401 V8.5.0 (2009-03)5Release 8
3GPP
5.3.1.1 General ................................................................................................................................................. 49
5.3.1.2 IP address allocation, renewal and release mechanisms for GTP based S5/S8 .................................... 51
5.3.1.2.1 IPv4 address allocation via default bearer activation and release via PDN connection release...... 51
5.3.1.2.2 IPv6 prefix allocation, renewal and release via IPv6 stateless address autoconfiguration.............. 52
5.3.1.2.3 IPv6 parameter configuration via stateless DHCPv6...................................................................... 52
5.3.1.2.4 IPv4 address allocation, renewal and release and IPv4 parameter configuration via DHCPv4...... 53
5.3.1.2.5 Void ................................................................................................................................................ 53
5.3.2 Attach procedure ........................................................................................................................................ 53
5.3.2.1 E-UTRAN Initial Attach ...................................................................................................................... 53
5.3.2.2 UTRAN/GERAN Initial Attach ........................................................................................................... 60
5.3.3 Tracking Area Update procedures.............................................................................................................. 60
5.3.3.0 Triggers for tracking area update.......................................................................................................... 60
5.3.3.0A Provision of UE's TAI to MME in ECM-CONNECTED state ............................................................ 61
5.3.3.1 Tracking Area Update procedure with Serving GW change ................................................................ 61
5.3.3.2 E-UTRAN Tracking Area Update without S-GW Change................................................................... 65
5.3.3.3 Routeing Area Update with MME interaction and without S-GW change........................................... 69
5.3.3.4 Void...................................................................................................................................................... 74
5.3.3.5 Void...................................................................................................................................................... 74
5.3.3.6 Routeing Area Update with MME interaction and with S-GW change................................................ 74
5.3.4 Service Request procedures ....................................................................................................................... 79
5.3.4.1 UE triggered Service Request............................................................................................................... 79
5.3.4.2 Handling of abnormal conditions in UE triggered Service Request..................................................... 80
5.3.4.3 Network Triggered Service Request..................................................................................................... 81
5.3.5 S1 release procedure .................................................................................................................................. 83
5.3.6 Void............................................................................................................................................................ 84
5.3.7 GUTI Reallocation procedure .................................................................................................................... 84
5.3.8 Detach procedure ....................................................................................................................................... 84
5.3.8.1 General ................................................................................................................................................. 84
5.3.8.2 UE-initiated Detach procedure ............................................................................................................. 85
5.3.8.2.1 UE-initiated Detach procedure for E-UTRAN................................................................................ 85
5.3.8.2.2 UE-initiated Detach procedure for GERAN/UTRAN with ISR activated...................................... 86
5.3.8.3 MME-initiated Detach procedure......................................................................................................... 88
5.3.8.3A SGSN-initiated Detach procedure with ISR activated.......................................................................... 89
5.3.8.4 HSS-initiated Detach procedure ........................................................................................................... 91
5.3.9 HSS User Profile management function procedure.................................................................................... 92
5.3.9.1 General ................................................................................................................................................. 92
5.3.9.2 Insert Subscriber Data procedure.......................................................................................................... 93
5.3.9.3 Purge function ...................................................................................................................................... 93
5.3.10 Security Function ....................................................................................................................................... 93
5.3.10.1 General ................................................................................................................................................. 93
5.3.10.2 Authentication and Key Agreement .....................................................................................................94
5.3.10.3 User Identity Confidentiality................................................................................................................ 94
5.3.10.4 User Data and Signalling Confidentiality.............................................................................................94
5.3.10.4.1 AS security mode command procedure .......................................................................................... 94
5.3.10.4.2 NAS Security Mode Command procedure ..................................................................................... 94
5.3.10.5 ME identity check procedure................................................................................................................ 95
5.3.11 UE Reachability procedures....................................................................................................................... 95
5.3.11.1 General ................................................................................................................................................. 95
5.3.11.2 UE Reachability Notification Request procedure................................................................................. 96
5.3.11.3 UE Activity Notification procedure...................................................................................................... 96
5.4 Session Management, QoS and interaction with PCC functionality................................................................ 96
5.4.1 Dedicated bearer activation........................................................................................................................ 96
5.4.2 Bearer modification with bearer QoS update ............................................................................................. 98
5.4.2.1 PDN GW initiated bearer modification with bearer QoS update ............................................................... 98
5.4.2.2 HSS Initiated Subscribed QoS Modification...................................................................................... 100
5.4.3 PDN GW initiated bearer modification without bearer QoS update ........................................................ 102
5.4.4 Bearer deactivation................................................................................................................................... 103
5.4.4.1 PDN GW initiated bearer deactivation............................................................................................... 103
5.4.4.2 MME Initiated Dedicated Bearer Deactivation .................................................................................. 106
5.4.5 UE requested bearer resource modification ............................................................................................. 107
5.4.6 Void.......................................................................................................................................................... 108
5.5 Handover........................................................................................................................................................ 109
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