ETSI TS 123 216 V17.0.0 (2022-05)

Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Single Radio Voice Call Continuity (SRVCC); Stage 2 (3GPP TS 23.216 version 17.0.0 Release 17)

RTS/TSGS-0223216vh00

General Information

• Status: Not Published
• Technical Committee: 3GPP SA 2 - Architecture
• Current Stage: 12 - Completion
• Completion Date: 11-May-2022

Standards Content (Sample)

ETSI TS 123 216 V17.0.0 (2022-05)






TECHNICAL SPECIFICATION
Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS);
LTE;
Single Radio Voice Call Continuity (SRVCC);
Stage 2
(3GPP TS 23.216 version 17.0.0 Release 17)

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3GPP TS 23.216 version 17.0.0 Release 17 1 ETSI TS 123 216 V17.0.0 (2022-05)

Reference
RTS/TSGS-0223216vh00
Keywords
GSM,LTE,UMTS
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ETSI

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3GPP TS 23.216 version 17.0.0 Release 17 2 ETSI TS 123 216 V17.0.0 (2022-05)
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ETSI

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3GPP TS 23.216 version 17.0.0 Release 17 3 ETSI TS 123 216 V17.0.0 (2022-05)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 6
1 Scope . 8
2 References . 8
3 Definitions and abbreviations . 10
3.1 Definitions . 10
3.2 Abbreviations . 11
4 High level Principles and Concepts . 11
4.1 High level Principle s . 11
4.1.1 Architectural Principles for 3GPP2 1xCS SRVCC . 11
4.1.2 Architectural Principles for SRVCC and vSRVCC to 3GPP UTRAN/GERAN . 12
4.1.3 Architectural Principles for SRVCC to 3GPP E-UTRAN/UTRAN (HSPA) . 12
4.1.4 Architectural Principles for 5G-SRVCC to UTRAN . 13
4.2 Concepts . 13
4.2.1 E-UTRAN to 3GPP2 1xCS SRVCC . 13
4.2.2 E-UTRAN to 3GPP UTRAN/GERAN SRVCC . 14
4.2.2a E-UTRAN to 3GPP UTRAN vSRVCC . 14
4.2.3 UTRAN (HSPA) to 3GPP UTRAN/GERAN SRVCC . 15
4.2.4 SRVCC for IMS emergency sessions . 16
4.2.4.1 E-UTRAN/UTRAN (HSPA) to 3GPP UTRAN/GERAN . 16
4.2.4.2 E-UTRAN to 3GPP2 1xCS . 17
4.2.4.3 SRVCC in Limited Service Mode . 18
4.2.4.3.1 E-UTRAN/UTRAN (HSPA) to 3GPP UTRAN/GERAN . 18
4.2.4.3.2 E-UTRAN to 3GPP2 1xCS . 18
4.2.4.3.3 NG-RAN to 3GPP UTRAN . 19
4.2.4.4 eCall over IMS . 19
4.2.5 Void . 19
4.2.6 CS to PS SRVCC . 19
4.2.7 NG-RAN to 3GPP UTRAN 5G-SRVCC. 20
4.2.7.1 General . 20
4.2.7.2 5G-SRVCC for IMS emergency sessions . 21
5 Architecture model and reference points . 22
5.1 General . 22
5.2 Reference architecture . 22
5.2.1 E-UTRAN to 3GPP2 1xCS SRVCC architecture . 22
5.2.2 E-UTRAN to 3GPP UTRAN/GERAN SRVCC architecture . 22
5.2.2a 3GPP E-UTRAN to 3GPP UTRAN vSRVCC architecture . 23
5.2.3 UTRAN (HSPA) to 3GPP UTRAN/GERAN SRVCC architecture . 24
5.2.4 3GPP UTRAN/GERAN to 3GPP E-UTRAN or UTRAN (HSPA) SRVCC architecture . 24
5.2.5 3GPP GERAN to 3GPP UTRAN (HSPA) SRVCC architecture . 25
5.2.6 NG-RAN to 3GPP UTRAN 5G-SRVCC architecture . 26
5.3 Functional Entities . 27
5.3.1 3GPP2 1x CS SRVCC interworking solution function (1xCS IWS) . 27
5.3.2 MSC Server enhanced for E-UTRAN/UTRAN (HSPA) to 3GPP UTRAN/GERAN SRVCC . 27
5.3.2a MSC Server enhanced for vSRVCC . 27
5.3.2b MSC Server enhanced for CS to PS SRVCC. 27
5.3.3 MME . 28
5.3.3.1 Interworking with 3GPP2 1xCS IWS . 28
5.3.3.1.1 Interworking with 3GPP2 1xCS IWS . 28
5.3.3.1.2 Selection of 3GPP2 1xCS IWS . 28
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3GPP TS 23.216 version 17.0.0 Release 17 4 ETSI TS 123 216 V17.0.0 (2022-05)
5.3.3.2 Interworking with 3GPP MSC Server enhanced for SRVCC from E-UTRAN / UTRAN (HSPA)
to 3GPP UTRAN/GERAN . 29
5.3.3.2.1 Interworking with 3GPP MSC Server enhanced for (v)SRVCC . 29
5.3.3.2.2 PS bearer splitting function . 29
5.3.3.2.3 Selection of MSC enhanced for SRVCC . 29
5.3.3.3 Interworking of Target MME with 3GPP MSC Server enhanced for SRVCC from CS to PS . 29
5.3.3.4 MME_SRVCC . 30
5.3.3A SGSN . 30
5.3.3A.1 Interworking with 3GPP MSC Server enhanced for SRVCC from E-UTRAN / UTRAN (HSPA)
to 3GPP UTRAN/GERAN . 30
5.3.3A.1.1 Interworking with 3GPP MSC Server enhanced for SRVCC. 30
5.3.3A.1.2 PS bearer splitting function . 30
5.3.3A.1.3 Selection of MSC enhanced for SRVCC . 30
5.3.3A.2 Interworking of Target SGSN with 3GPP MSC Server enhanced for SRVCC from CS to PS . 31
5.3.4 UE enhanced for SRVCC . 31
5.3.4.1 Interworking with 3GPP2 1xCS . 31
5.3.4.2 Interworking with 3GPP UTRAN/GERAN for SRVCC from E-UTRAN / UTRAN (HSPA) to
3GPP UTRAN/GERAN . 31
5.3.4.3 Interworking of UE with 3GPP UTRAN/GERAN for SRVCC from CS to PS . 31
5.3.4a UE enhanced for vSRVCC . 31
5.3.4b UE enhanced for 5G-SRVCC . 32
5.3.5 Serving/PDN GW . 32
5.3.6 E-UTRAN . 32
5.3.6.1 Interworking with 3GPP2 1xCS . 32
5.3.6.2 Interworking with 3GPP UTRAN/GERAN for SRVCC from E-UTRAN to 3GPP
UTRAN/GERAN . 32
5.3.6.2a Interworking with 3GPP UTRAN for vSRVCC . 32
5.3.6A UTRAN (HSPA) . 33
5.3.6B GERAN/UTRAN CS . 33
5.3.7 HSS . 33
5.3.7.1 Interworking with 3GPP UTRAN/GERAN for SRVCC or vSRVCC from E-UTRAN / UTRAN
(HSPA) to 3GPP UTRAN/GERAN . 33
5.3.7.2 Interworking with 3GPP UTRAN/GERAN for SRVCC from CS to PS . 33
5.3.8 PCC . 34
5.3.9 UDM . 34
5.3.10 AMF. 34
5.3.11 NG-RAN . 34
5.4 Reference points . 35
5.4.1 MME – 3GPP2 1xCS IWS (S102) . 35
5.4.2 MME/SGSN – MSC Server (Sv) . 35
5.4.2A MME_SRVCC - MSC Server (Sv) . 35
5.4.3 E-UTRAN – MME (S1-MME) . 35
5.4.3A UTRAN (HSPA) – SGSN (Iu-ps) . 35
5.4.4 HSS – MME (S6a) . 35
5.4.5 HSS – SGSN (Gr, S6d) . 35
5.4.6 HSS - MSC (MAP D) . 35
5.4.7 AMF - MME_SRVCC . 36
5.4.8 NG-RAN - AMF . 36
6 Procedures and flows. 36
6.1 SRVCC from E-UTRAN to 3GPP2 1xCS . 36
6.1.1 E-UTRAN Attach procedure for SRVCC . 36
6.1.2 Service Request procedures for SRVCC . 36
6.1.2A PS Handover procedures for SRVCC . 37
6.1.3 Call flows for SRVCC from E-UTRAN . 37
6.2 E-UTRAN and 3GPP GERAN/UTRAN (v)SRVCC . 39
6.2.1 E-UTRAN Attach procedure for (v)SRVCC . 39
6.2.1A Service Request procedures for (v)SRVCC . 39
6.2.1B PS Handover procedures for (v)SRVCC . 40
6.2.1C Dedicated Bearer Establishment and Modification procedures for vSRVCC . 40
6.2.2 Call flows for (v)SRVCC from E-UTRAN . 40
6.2.2.1 SRVCC from E-UTRAN to GERAN without DTM support . 40
ETSI

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3GPP TS 23.216 version 17.0.0 Release 17 5 ETSI TS 123 216 V17.0.0 (2022-05)
6.2.2.1A SRVCC from E-UTRAN to GERAN with DTM but without DTM HO support and from E-
UTRAN to UTRAN without PS HO . 44
6.2.2.2 SRVCC from E-UTRAN to UTRAN with PS HO or GERAN with DTM HO support . 44
6.2.2.3 vSRVCC from E-UTRAN to UTRAN with PS HO support. 49
6.2.2.4 vSRVCC from E-UTRAN to UTRAN without PS HO support . 52
6.2.3 Returning back to E-UTRAN . 52
6.3 UTRAN (HSPA) and 3GPP GERAN/UTRAN SRVCC . 53
6.3.1 GPRS Attach procedure for SRVCC . 53
6.3.1A Service Request procedures for SRVCC . 53
6.3.1B PS Handover procedures for SRVCC . 53
6.3.2 Call flows for SRVCC from UTRAN (HSPA) . 54
6.3.2.1 SRVCC from UTRAN (HSPA) to GERAN without DTM support . 54
6.3.2.1A SRVCC from UTRAN (HSPA) to GERAN with DTM but without DTM HO support and from
UTRAN (HSPA) to UTRAN without PS HO . 57
6.3.2.2 SRVCC from UTRAN (HSPA) to UTRAN or GERAN with DTM HO support . 57
6.4 CS to PS SRVCC . 61
6.4.1 GPRS Attach procedure for SRVCC . 61
6.4.2 E-UTRAN Attach procedure for SRVCC . 61
6.4.3 Call flows for SRVCC to E-UTRAN/UTRAN (HSPA) . 61
6.4.3.1 SRVCC to E-UTRAN/UTRAN (HSPA) from GERAN without DTM/PS HO support . 61
6.4.3.2 SRVCC to E-UTRAN/UTRAN (HSPA) from GERAN with DTM support but without DTM HO
support and SRVCC to E-UTRAN from UTRAN without PS HO support . 64
6.4.3.3 SRVCC to E-UTRAN/UTRAN (HSPA) with DTM/PS HO support . 64
6.5 5G-SRVCC from NG-RAN to 3GPP UTRAN . 64
6.5.1 NG-RAN Registration procedure for SRVCC . 64
6.5.2 Service Request procedures for SRVCC . 64
6.5.3 Intra-5GS PS Handover procedure for SRVCC . 64
6.5.4 5G-SRVCC from NG-RAN to 3GPP UTRAN procedure . 65
6.5.5 Emergency PDU session establishment and release procedure for SRVCC . 67
7 Charging . 67
8 Handover Failure . 67
8.1 Failure in EUTRAN/UTRAN (HSPA) to 3GPP UTRAN/GERAN (v)SRVCC . 67
8.1.1 Failure before MSC Server initiates Session Transfer . 67
8.1.1a Failure after MSC Server initiates Session Transfer . 67
8.1.1a.1 Failure before responding to PS to CS HO request . 67
8.1.1a.2 Failure after responding to PS to CS HO request . 68
8.1.2 Failure after UE receives HO command . 69
8.1.3 Handover Cancellation . 69
8.1.4 Handover Failure due to alerting/pre-alerting state . 70
8.2 Failure in CS to PS SRVCC . 71
8.2.1 Failure before UE initiates Session Transfer detected by MSC Server . 71
8.2.2 Failure before UE initiates Session Transfer detected by MME . 71
8.2.3 CS to PS Handover Cancellation . 72
8.3 Failure in 5G-SRVCC from NG-RAN to 3GPP UTRAN . 73
9 Security. 73
9.1 Network Domain Security with 3GPP2 1xCS IWS . 73
9.2 Network Domain Security with 3GPP UTRAN/GERAN MSC Server . 73
Annex A (informative): Determination of Neighbour Cell List . 74
A.1 SRVCC from E-UTRAN to 3GPP2 1xCS . 74
A.2 SRVCC from E-UTRAN to GERAN / UTRAN .
...