ETSI TS 123 007 V11.4.0 (2013-01) Technical Specification Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Restoration procedures (3GPP TS 23.007 version 11.4.0 Release 11) 3GPP TS 23.007 version 11.4.0 Release 11 1 ETSI TS 123 007 V11.4.0 (2013-01) Reference RTS/TSGC-0423007vb40 Keywords GSM,LTE,UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 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 Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the 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 http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp 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. © European Telecommunications Standards Institute 2013. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTM and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI 3GPP TS 23.007 version 11.4.0 Release 11 2 ETSI TS 123 007 V11.4.0 (2013-01) Intellectual Property Rights IPRs essential or potentially essential to the present document 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 (http://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. 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. ETSI 3GPP TS 23.007 version 11.4.0 Release 11 3 ETSI TS 123 007 V11.4.0 (2013-01) Contents Intellectual Property Rights ................................................................................................................................ 2 Foreword ............................................................................................................................................................. 2 Foreword ............................................................................................................................................................. 7 1 Scope ........................................................................................................................................................ 8 1.1 References .......................................................................................................................................................... 8 1.2 Abbreviations ................................................................................................................................................... 10 2 Design objectives ................................................................................................................................... 10 3 Restoration indicators in location registers and in GPRS support nodes ............................................... 10 3.1 Restoration Indicators in the VLR .................................................................................................................... 10 3.2 Restoration Indicators in the HLR .................................................................................................................... 12 3.3 Restoration Indicators in the SGSN ................................................................................................................. 12 3.4 Restoration Indicators in the MME .................................................................................................................. 13 4 Restoration of data in the VLR ............................................................................................................... 15 4.0 VLR Failure with Restart ................................................................................................................................. 15 4.0a VLR Failure without Restart ............................................................................................................................ 15 4.1 Restart of the VLR ........................................................................................................................................... 15 4.2 Restoration Procedures ..................................................................................................................................... 16 4.2.0 General ........................................................................................................................................................ 16 4.2.1 Incoming Call ............................................................................................................................................. 16 4.2.2 Mobile Terminated Short Message ............................................................................................................. 17 4.2.3 Mobile Terminating Location Request (MT-LR) ....................................................................................... 18 4.2.4 Incoming LCS Information Request (GSM only) ....................................................................................... 19 4.2.5 Outgoing MS request .................................................................................................................................. 19 4.2.6 Outgoing LMU Request (GSM only) ......................................................................................................... 20 4.2.7 Location Updating or IMSI Attach ............................................................................................................. 20 4.2.8 Use of TMSI ............................................................................................................................................... 21 4.2.9 SGSN associations ...................................................................................................................................... 21 4.2.10 MME associations ...................................................................................................................................... 21 5 Restoration of data in the HLR ............................................................................................................... 21 5.1 Restart of the HLR/HSS ................................................................................................................................... 22 5.2 Procedures During Restoration......................................................................................................................... 22 5.2.1 Mobile terminated call ................................................................................................................................ 22 5.2.2 Mobile Originated Activity ......................................................................................................................... 22 6 Periodic location updating ...................................................................................................................... 23 7 Periodic routeing area updating .............................................................................................................. 23 8 Stand-alone operation of the VLR .......................................................................................................... 23 9 Stand-alone operation of the SGSN ....................................................................................................... 23 9A Stand-alone operation of the MME ........................................................................................................ 24 10 Restoration of data in the GGSN ............................................................................................................ 24 10.0 GGSN failure .................................................................................................................................................... 24 10.1 Restart of the GGSN......................................................................................................................................... 24 10.2 Restoration Procedures ..................................................................................................................................... 24 10.2.0 General ........................................................................................................................................................ 24 10.2.1 Mobile terminated transmission .................................................................................................................. 24 10.2.2 Mobile originated transmission................................................................................................................... 25 11 Restoration of data in the SGSN ............................................................................................................ 25 11.0 SGSN Failure ................................................................................................................................................... 25 11.0.1 Gn/Gp SGSN failure ................................................................................................................................... 25 ETSI 3GPP TS 23.007 version 11.4.0 Release 11 4 ETSI TS 123 007 V11.4.0 (2013-01) 11.0.2 SGSN Failure using S4 ............................................................................................................................... 25 11.1 Restart of the SGSN ......................................................................................................................................... 26 11.2 Restoration Procedures ..................................................................................................................................... 26 11.2.1 Mobile terminated user data transmission .................................................................................................. 26 11.2.2 Mobile terminated services requested by the MSC/VLR............................................................................ 26 11.2.3 Mobile terminated SMS over GPRS ........................................................................................................... 26 11.2.4 Mobile originated Routeing Area Updating or Attach ................................................................................ 27 11.2.5 Mobile originated LLC frame ..................................................................................................................... 27 11.2.6 Mobile originated Service Request ............................................................................................................. 28 11.3 Use of TLLI ...................................................................................................................................................... 28 11.4 VLR associations .............................................................................................................................................. 28 12 Restoration of Data in an SMLC (GSM only) ........................................................................................ 28 12.1 Restart of an SMLC .......................................................................................................................................... 28 12.2 Data Restoration for a Specific LMU ............................................................................................................... 29 13 Restoration of Data in an LMU (GSM only) .......................................................................................... 29 14 Restoration of data in the MME ............................................................................................................. 29 14.1 Restart of the MME .......................................................................................................................................... 29 14.1.1 Restoration Procedures ............................................................................................................................... 29 14.1.2 Mobile originated Tracking Area Updating or E-UTRAN Attach.............................................................. 29 14.1.3 Mobile terminated services requested by the MSC/VLR............................................................................ 30 14.1.4 Mobile terminated user data transmission .................................................................................................. 30 14.1.5 Mobile originated Service Request ............................................................................................................. 30 14.1A Restart of a peer node ....................................................................................................................................... 31 14.1A.1 SGW Failure ............................................................................................................................................... 31 14.2 VLR associations .............................................................................................................................................. 31 14.3 Partial Failure Handling at MME ..................................................................................................................... 31 14.3.1 General ........................................................................................................................................................ 31 14.3.2 Procedures during PDN Connection Establishment ................................................................................... 31 14.3.3 Procedures during MME Partial Failure ..................................................................................................... 31 14.3.4 Procedures during a Peer"s Partial Failure .................................................................................................. 32 14.3.5 Procedures during PDN Connection Removal or Modification .................................................................. 32 15 Restoration of data in GERAN/UTRAN ................................................................................................ 32 15.1 BSS Failure (A/Gb mode) ................................................................................................................................ 32 15.2 RNC/BSC Failure (Iu mode) ............................................................................................................................ 33 15.3 RNC/BSC Failure (Iu mode) using S4 ............................................................................................................. 33 15A Restoration of data in E-UTRAN ........................................................................................................... 33 15A.1 eNodeB Failure ................................................................................................................................................ 33 15A.2 S1-AP path failure ............................................................................................................................................ 33 16 Restoration of data in the SGW .............................................................................................................. 34 16.1 Restart of the SGW........................................................................................................................................... 34 16.1.0 SGW Failure ............................................................................................................................................... 34 16.1.1 Restoration Procedures ............................................................................................................................... 34 16.1A Restart of a peer node ....................................................................................................................................... 34 16.1A.1 MME/S4-SGSN Failure .............................................................................................................................. 34 16.1A.1.1 General .................................................................................................................................................. 34 16.1A.2 PGW Failure ............................................................................................................................................... 34 16.2 Partial Failure Handling at SGW ...................................................................................................................... 35 16.2.1 General ........................................................................................................................................................ 35 16.2.2 Procedures during PDN Connection Establishment ................................................................................... 36 16.2.3 Procedures during SGW Partial Failure ...................................................................................................... 36 16.2.4 Procedures during a Peer"s Partial Failure .................................................................................................. 36 16.2.5 Procedures during PDN Connection Removal or Modification .................................................................. 37 17 Restoration of data in the PGW .............................................................................................................. 38 17.1 Restart of the PGW........................................................................................................................................... 38 17.1.0 PGW Failure ............................................................................................................................................... 38 17.1.1 Restoration Procedures ............................................................................................................................... 38 17.1A Restart of a peer node ....................................................................................................................................... 39 ETSI 3GPP TS 23.007 version 11.4.0 Release 11 5 ETSI TS 123 007 V11.4.0 (2013-01) 17.1A.1 SGW/ePDG/TWAN Failure ....................................................................................................................... 39 17.1A.2 PCRF Failure .............................................................................................................................................. 39 17.2 Partial Failure Handling at PGW ...................................................................................................................... 39 17.2.1 General ........................................................................................................................................................ 39 17.2.2 Procedures during PDN Connection Establishment ................................................................................... 39 17.2.3 Procedures during PGW Partial Failure ...................................................................................................... 40 17.2.4 Procedures during a Peer"s Partial Failure .................................................................................................. 40 17.2.5 Procedures during PDN Connection Removal or Modification .................................................................. 40 17A Restoration of data in the MBMS GW ................................................................................................... 41 17A.1 Restart of the MBMS GW ................................................................................................................................ 41 17B Restoration of data in the ePDG ............................................................................................................. 41 17B.1 Restart of the ePDG .......................................................................................................................................... 41 17B.1.1 ePDG Failure .............................................................................................................................................. 41 17B.1.2 Restoration Procedures ............................................................................................................................... 41 17B.1A Restart of a peer node ....................................................................................................................................... 42 17B.1A.1 PGW Failure ............................................................................................................................................... 42 17B.2 Partial Failure Handling at ePDG ..................................................................................................................... 42 17B.2.1 General ........................................................................................................................................................ 42 17B.2.2 Procedures during PDN Connection Establishment ................................................................................... 42 17B.2.3 Procedures during ePDG Partial Failure ..................................................................................................... 42 17B.2.4 Procedures during PGW Partial Failure ...................................................................................................... 43 17B.2.5 Procedures during PDN Connection Removal or Modification .................................................................. 43 17C Restoration of data in the TWAN ........................................................................................................... 43 17C.1 Restart of the TWAN ....................................................................................................................................... 43 17C.1.1 TWAN Failure ............................................................................................................................................ 43 17C.1.2 Restoration Procedures ............................................................................................................................... 43 17C.1A Restart of a peer node ....................................................................................................................................... 43 17C.1A.1 PGW Failure ............................................................................................................................................... 43 17C.2 Partial Failure Handling at TWAN ................................................................................................................... 44 17C.2.1 General ........................................................................................................................................................ 44 17C.2.2 Procedures during PDN Connection Establishment ................................................................................... 44 17C.2.3 Procedures during TWAN Partial Failure ................................................................................................... 44 17C.2.4 Procedures during PGW Partial Failure ...................................................................................................... 44 17C.2.5 Procedures during PDN Connection Removal or Modification .................................................................. 45 18 GTP-C based restart procedures ............................................................................................................. 45 19 PMIPv6 based restart procedures ........................................................................................................... 45 20 Path management procedures ................................................................................................................. 46 20.1 General ............................................................................................................................................................. 46 20.2 Signalling path failure detection and handling ................................................................................................. 46 20.2.1 General ........................................................................................................................................................ 46 20.2.2 SGW functionality ...................................................................................................................................... 47 20.3 User plane path failure detection and handling ................................................................................................ 47 20.3.1 General ........................................................................................................................................................ 47 21 Error Indication handling ....................................................................................................................... 48 21.1 General ............................................................................................................................................................. 48 21.2 GGSN ............................................................................................................................................................... 48 21.3 Gn/Gp SGSN .................................................................................................................................................... 48 21.4 S4 SGSN .......................................................................................................................................................... 48 21.5 RNC or NodeB ................................................................................................................................................. 49 21.6 eNodeB ............................................................................................................................................................. 49 21.7 SGW ................................................................................................................................................................. 49 21.8 PGW ................................................................................................................................................................. 50 21.9 MBMS GW ...................................................................................................................................................... 50 21.10 ePDG ................................................................................................................................................................ 50 21.11 TWAN .............................................................................................................................................................. 50 22 Downlink Data Notification Handling at MME/S4 SGSN .................................................................... 51 ETSI 3GPP TS 23.007 version 11.4.0 Release 11 6 ETSI TS 123 007 V11.4.0 (2013-01) 23 General partial failure handling procedures ........................................................................................... 51 24 Restoration of data in the PCRF ............................................................................................................. 54 24.1 Restart of the PCRF .......................................................................................................................................... 54 24.1.0 PCRF Restart .............................................................................................................................................. 54 25 Network triggered service restoration procedure ................................................................................... 54 25.1 General ............................................................................................................................................................. 54 25.2 Network triggered service restoration procedure without ISR ......................................................................... 55 25.2.1 General ........................................................................................................................................................ 55 25.2.2 SGW procedure .......................................................................................................................................... 55 25.2.3 MME/SGSN procedure ............................................................................................................................... 56 25.3 Network triggered service restoration procedure with ISR .............................................................................. 57 25.3.1 General ........................................................................................................................................................ 57 25.3.2 SGW procedure .......................................................................................................................................... 57 25.3.3 MME/S4-SGSN procedure ......................................................................................................................... 58 26 Mobile terminated CS service delivery via an alternative MME in MME pool .................................... 58 27 Restoration of PDN connections after an SGW failure .......................................................................... 60 27.1 General ............................................................................................................................................................. 60 27.2 Restoration of PDN connections after an SGW failure for UEs without ISR .................................................. 60 27.2.1 General ........................................................................................................................................................ 60 27.2.2 MME/S4-SGSN triggered SGW restoration ............................................................................................... 60 27.2.2.1 General .................................................................................................................................................. 60 27.2.2.2 MME/S4-SGSN procedure ................................................................................................................... 61 27.2.2.3 PGW procedure ..................................................................................................................................... 62 27.2.2.4 PCRF procedure .................................................................................................................................... 63 27.2.3 PGW triggered SGW restoration ................................................................................................................ 63 27.2.3.1 General .................................................................................................................................................. 63 27.2.3.2 MME/S4-SGSN procedure ................................................................................................................... 63 27.2.3.3 SGW procedure ..................................................................................................................................... 64 27.2.3.4 PGW procedure ..................................................................................................................................... 64 27.3 Restoration of PDN connections after an SGW failure for UEs with ISR ....................................................... 65 27.3.1 MME/S4-SGSN triggered SGW restoration for UEs with ISR .................................................................. 65 27.3.1.1 General .................................................................................................................................................. 65 27.3.1.2 MME/S4-SGSN procedure ................................................................................................................... 66 27.3.2 PGW triggered SGW restoration for UEs with ISR .................................................................................... 67 27.3.2.1 General .................................................................................................................................................. 67 27.3.2.2 MME/S4-SGSN procedure ................................................................................................................... 67 28 Restoration of data in the CSS ............................................................................................................... 67 28.1 Restart of the CSS ............................................................................................................................................ 67 Annex A (informative): Change history ............................................................................................... 68 History .............................................................................................................................................................. 71 ETSI 3GPP TS 23.007 version 11.4.0 Release 11 7 ETSI TS 123 007 V11.4.0 (2013-01) Foreword This Technical Specification (TS) has been produced by the 3rd Generation Partnership Project (3GPP). The present document defines the restoration procedures within the 3GPP system. 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 3GPP TS 23.007 version 11.4.0 Release 11 8 ETSI TS 123 007 V11.4.0 (2013-01) 1 Scope The data stored in location registers are automatically updated in normal operation; the main information stored in a location register defines the location of each mobile station and the subscriber data required to handle traffic for each mobile subscriber. The loss or corruption of these data will seriously degrade the service offered to mobile subscribers; it is therefore necessary to define procedures to limit the effects of failure of a location register, and to restore the location register data automatically. The present document defines the necessary procedures. The basic principle is that restoration should be based on radio contact to avoid faulty data being spread in the system. Subscriber data for supplementary services must also be correctly restored, although the impact on service of corruption of supplementary service data is less severe. Procedures for supporting these functions are defined in 3GPP TS 29.002 [6] and 3GPP TS 29.060 [8]. The MAP operation "IMSI Attach" is used only in MAP version 1; in MAP version 2 the same function is performed by the MAP operation "Update Location Area". References in this specification to IMSI attach apply only to MAP version 1 network entities. If the restoration of subscriber data in the VLR is triggered by Location Updating or IMSI Attach, the VLR retrieves subscriber data from the HLR by sending an "Update Location" request, which triggers one or more "Insert Subscriber Data" operations from the HLR. The "Update Location" request may also be used to send the LMSI to the HLR. If the restoration of subscriber data in the VLR is triggered by a "Provide Roaming Number" request, the behaviour of the VLR depends on whether it is implemented according to MAP version 1 or MAP version 2. For MAP version 2, the VLR retrieves subscriber data from the HLR by sending a "Restore Data" request, which triggers one or more "Insert Subscriber Data" operations from the HLR. The "Restore Data" request is also used to send the LMSI to the HLR. For MAP version 1, the VLR retrieves subscriber data from the HLR by sending a "Send Parameters" request with parameter type "Subscriber Data", which cannot be used to send the LMSI to the HLR. The VLR number and MSC number in the subscriber data in the HLR are updated by the "Update Location" procedure. The GGSN (Gateway GPRS Support Node) is the point of PDN interconnection with the GSM PLMN supporting GPRS. The GGSN contains routing information for GPRS users with a PDP context active. The necessary procedures needed to restore GGSN data information after a restart are described in this document. The SGSN (Serving GPRS Support Node) is the node that is serving the MS. The SGSN stores information regarding e.g. mobility management, routing and security. The necessary procedures needed to restore this SGSN information after a restart are described in this document. The MME (Mobility Management Entity) is the node that is serving the UE when attached to E-UTRAN. The MME stores information regarding e.g. mobility management, routing and security. The necessary procedures needed to restore this MME information after a restart are described in this document. A Type A LMU (Location Measurement Unit) is a network node, accessed over the GSM air interface, that is functionally similar to an MS. All requirements associated with a non-GPRS MS in this specification apply also to a Type A LMU except where specified otherwise. 1.1 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. ETSI 3GPP TS 23.007 version 11.4.0 Release 11 9 ETSI TS 123 007 V11.4.0 (2013-01) [1] 3GPP TR 21.905: "Vocabulary of 3GPP Specifications ". [2] Void [3] Void [4] 3GPP TS 23.040: "Technical realization of the Short Message Service (SMS)". [5] 3GPP TS 23.060: "General Packet Radio Service (GPRS); Service description; Stage 2". [6] 3GPP TS 29.002: "Mobile Application Part (MAP) specification". [7] 3GPP TS 29.018: "General Packet Radio Service (GPRS); Serving GPRS Support Node (SGSN) - Visitors Location Register (VLR); Gs interface layer 3 specification". [8] 3GPP TS 29.060: "General Packet Radio Service (GPRS); GPRS Tunneling Protocol (GTP) across the Gn and Gp interface". [9] 3GPP TS 43.005: "Technical performance objectives". [10] 3GPP TS 23.071: " Location Services (LCS); Functional description; Stage 2". [11] Void [12] 3GPP TS 23.246: "Multimedia Broadcast/Multicast Service (MBMS); Architecture and functional description". [13] 3GPP TS 29.274: "3GPP Evolved Packet System (EPS); Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C); Stage 3". [14] 3GPP TS 29.118:"Mobility Management Entity (MME) – Visitor Location Register (VLR) SGs interface specification". [15] 3GPP TS 23.401: "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access". [16] 3GPP TS 29.275: "Proxy Mobile IPv6 (PMIPv6) based Mobility and Tunneling protocols; Stage 3". [17] 3GPP TS 29.281: "General Packet Radio System (GPRS) Tunneling Protocol User Plane (GTPv1- U)". [18] 3GPP TS 23.402: "Architecture enhancements for non-3GPP accesses". [19] 3GPP TS 24.301: "Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3". [20] 3GPP TS 24.008: "Mobile radio interface Layer 3 specification; Core network protocols; Stage 3". [21] 3GPP TS 29.213: "Policy and charging control signalling flows and Quality of Service (QoS) parameter mapping ". [22] IETF RFC 5847: "Heartbeat Mechanism for Proxy Mobile IPv6". [23] 3GPP TS 23.018: "Basic call handling; Technical realization". [24] 3GPP TS 23.236: "Intra-domain connection of Radio Access Network (RAN) nodes to multiple Core Network (CN) nodes". [25] 3GPP TS 29.212: "Policy and Charging Control (PCC); Reference points". [26] IETF draft-krishnan-netext-update-notifications-00: "Update Notifications for Proxy Mobile IPv6". Editor's Note: The above document cannot be formally referenced until it is published as an RFC. ETSI