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TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
Mobility Management Entity (MME)
- Visitor Location Register (VLR) SGs interface specification
(3GPP TS 29.118 version 15.2.0 Release 15)
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3GPP TS 29.118 version 15.2.0 Release 15 1 ETSI TS 129 118 V15.2.0 (2018-07)
Reference
RTS/TSGC-0129118vf20
Keywords
LTE,UMTS
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3GPP TS 29.118 version 15.2.0 Release 15 2 ETSI TS 129 118 V15.2.0 (2018-07)
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
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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
.
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
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3GPP TS 29.118 version 15.2.0 Release 15 3 ETSI TS 129 118 V15.2.0 (2018-07)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 8
1 Scope . 9
2 References . 9
3 Definitions and abbreviations . 10
3.1 Definitions . 10
3.2 Abbreviations . 11
4 Description of the SGs association between a VLR and an MME . 11
4.1 General . 11
4.2 SGs association at the VLR . 11
4.2.1 General . 11
4.2.2 States at the VLR . 12
4.3 SGs association at the MME . 12
4.3.1 General . 12
4.3.2 MM context variables at the MME . 13
4.3.3 States at the MME . 13
4.3.4 State transitions in the MME without SGsAP signalling . 14
4.3.5 State transitions in the VLR without SGsAP signalling . 14
5 Procedures for SGs . 15
5.1 Paging for non-EPS services procedure . 15
5.1.1 General description . 15
5.1.2 Procedures in the VLR . 15
5.1.2.1 General . 15
5.1.2.2 Paging Initiation . 15
5.1.2.3 Paging Response . 16
5.1.2.4 Paging Failure . 16
5.1.2.5 UE unreachable . 17
5.1.3 Procedures in the MME . 17
5.1.3.1 General . 17
5.1.3.2 Procedure when no NAS signalling connection exists . 20
5.1.3.3 Procedure when a NAS signalling connection exists . 21
5.2 Location update for non-EPS services procedure . 21
5.2.1 General description . 21
5.2.2 Procedures in the MME . 22
5.2.2.1 General . 22
5.2.2.2 Location update initiation . 22
5.2.2.2.1 General . 22
5.2.2.2.2 VLR fails without restart . 24
5.2.2.3 Location update response . 25
5.2.2.4 Location update failure . 25
5.2.2.5 Abnormal cases . 25
5.2.2.6 Additional MME procedure for UE supporting NB-S1 mode only . 26
5.2.3 Procedures in the VLR . 27
5.2.3.1 General . 27
5.2.3.2 Location update response . 27
5.2.3.3 Location update failure . 28
5.2.3.4 TMSI reallocation procedure . 28
5.2.3.5 Abnormal cases . 28
5.3 Non-EPS alert procedure . 29
5.3.1 General description . 29
5.3.2 Procedures in the VLR . 29
5.3.2.1 Alert Initiation . 29
ETSI
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3GPP TS 29.118 version 15.2.0 Release 15 4 ETSI TS 129 118 V15.2.0 (2018-07)
5.3.2.2 Alert Response . 29
5.3.2.3 Alert Failure . 29
5.3.2.4 Alert Indication . 29
5.3.2.5 Abnormal cases . 30
5.3.3 Procedures in the MME . 30
5.3.3.1 Alert response . 30
5.3.3.2 Alert failure . 30
5.3.3.3 Alert indication . 30
5.4 Explicit IMSI detach from EPS services . 30
5.4.1 General description . 30
5.4.2 Procedures in the MME . 31
5.4.2.1 Explicit EPS detach initiation . 31
5.4.2.2 Explicit EPS detach response . 31
5.4.2.3 Abnormal cases . 31
5.4.3 Procedures in the VLR . 31
5.5 Explicit IMSI detach from non-EPS services . 32
5.5.1 General description . 32
5.5.2 Procedures in the MME . 32
5.5.2.1 Explicit IMSI detach initiation . 32
5.5.2.2 Explicit IMSI detach response . 32
5.5.2.3 Abnormal cases . 32
5.5.3 Procedures in the VLR . 33
5.6 Implicit IMSI detach from non-EPS services . 33
5.6.1 General description . 33
5.6.2 Procedures in the MME . 33
5.6.3 Procedures in the VLR . 33
5.7 VLR failure procedure . 34
5.7.1 General description . 34
5.7.2 Procedures in the VLR . 34
5.7.2.1 VLR Reset Initiation . 34
5.7.2.2 VLR Reset Response. 34
5.7.2.3 Abnormal cases . 34
5.7.3 Procedures in the MME . 34
5.7.3.1 VLR reset indication . 34
5.7.3.2 Void. 35
5.8 MME failure procedure . 35
5.8.1 General description . 35
5.8.2 Procedures in the MME . 35
5.8.2.1 MME Reset Initiation . 35
5.8.2.2 MME Reset Response . 35
5.8.2.3 Abnormal cases . 35
5.8.3 Procedures in the VLR . 35
5.9 HSS failure . 36
5.9.1 General description . 36
5.9.2 Procedures in the MME . 36
5.10 MM information procedure . 36
5.10.1 General description . 36
5.10.2 Procedures in the VLR . 36
5.10.3 Procedures in the MME . 36
5.11 Procedure for tunnelling of NAS messages . 37
5.11.1 General description . 37
5.11.2 Uplink unitdata procedure . 37
5.11.2.1 Procedures in the MME . 37
5.11.2.2 Procedures in the VLR . 37
5.11.2.2.1 General description . 37
5.11.2.2.2 Abnormal cases . 38
5.11.2.3 Void. 38
5.11.3 Downlink unitdata procedure . 38
5.11.3.1 Procedures in the VLR . 38
5.11.3.2 Procedures in the MME . 38
5.11.3.2.1 General description . 38
5.11.3.2.2 Abnormal cases . 38
ETSI
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3GPP TS 29.118 version 15.2.0 Release 15 5 ETSI TS 129 118 V15.2.0 (2018-07)
5.11.3.3 Void. 39
5.11.4 Release procedure . 39
5.12 Service request procedure. 39
5.12.1 General description . 39
5.12.2 Procedures in the MME . 39
5.12.3 Procedures in the VLR . 40
5.13 Service abort procedure . 40
5.13.1 General description . 40
5.13.2 Procedures in the VLR . 40
5.13.3 Procedures in the MME . 40
5.14 Implicit IMSI detach from EPS services . 40
5.14.1 General description . 40
5.14.2 Procedures in the MME . 41
5.14.3 Procedures in the VLR . 41
5.15 UE fallback supervision procedure. 41
5.15.0 General description . 41
5.15.1 Procedures in the VLR . 41
5.16 Procedure for MO CSFB indication . 42
5.16.1 General description . 42
5.16.2 Procedures in the MME . 42
5.16.3 Procedures in the VLR . 42
6 SGs transport . 42
6.1 General . 42
6.2 IP layer . 42
6.3 Transport layer . 42
7 Error handling . 43
7.1 General . 43
7.2 Message too short . 43
7.3 Unknown or unforeseen message type . 43
7.4 Missing mandatory information element . 44
7.5 Information elements unknown or unforeseen in the message . 44
7.6 Out of sequence information elements . 44
7.7 Repeated information elements . 44
7.8 Syntactically incorrect mandatory information element. . 44
7.9 Syntactically incorrect optional information elements . 44
7.10 Conditional information element errors . 44
7.11 Information elements with semantically incorrect contents . 44
8 Message functional definitions and contents . 45
8.1 SGsAP-ALERT-ACK message .
...