Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Interworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networks (3GPP TS 29.163 version 14.13.0 Release 14)

RTS/TSGC-0329163ved0

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Published
Publication Date
09-Oct-2019
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12 - Completion
Completion Date
10-Oct-2019
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ETSI TS 129 163 V14.13.0 (2019-10) - Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Interworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networks (3GPP TS 29.163 version 14.13.0 Release 14)
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ETSI TS 129 163 V14.13.0 (2019-10)
TECHNICAL SPECIFICATION
Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS);
LTE;
Interworking between the IP Multimedia (IM) Core Network (CN)
subsystem and Circuit Switched (CS) networks
(3GPP TS 29.163 version 14.13.0 Release 14)
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3GPP TS 29.163 version 14.13.0 Release 14 1 ETSI TS 129 163 V14.13.0 (2019-10)
Reference
RTS/TSGC-0329163ved0
Keywords
GSM,LTE,UMTS
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ETSI
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3GPP TS 29.163 version 14.13.0 Release 14 2 ETSI TS 129 163 V14.13.0 (2019-10)
Intellectual Property Rights
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Legal Notice

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The present document may refer to technical specifications or reports using their 3GPP identities. These shall be

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Modal verbs terminology

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ETSI
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3GPP TS 29.163 version 14.13.0 Release 14 3 ETSI TS 129 163 V14.13.0 (2019-10)
Contents

Intellectual Property Rights ................................................................................................................................ 2

Legal Notice ....................................................................................................................................................... 2

Modal verbs terminology .................................................................................................................................... 2

Foreword ........................................................................................................................................................... 17

1 Scope ...................................................................................................................................................... 18

2 References .............................................................................................................................................. 18

3 Definitions and abbreviations ................................................................................................................. 24

3.1 Definitions ........................................................................................................................................................ 24

3.2 Abbreviations ................................................................................................................................................... 25

4 General ................................................................................................................................................... 27

4.1 General interworking overview ........................................................................................................................ 27

5 Network characteristics .......................................................................................................................... 27

5.1 Key characteristics of ISUP/BICC based CS networks .................................................................................... 27

5.2 Key characteristics of IM CN subsystem ......................................................................................................... 27

6 Interworking with CS networks ............................................................................................................. 27

6.1 Interworking reference model .......................................................................................................................... 27

6.1.1 Interworking reference points and interfaces .............................................................................................. 28

6.1.2 Interworking functional entities .................................................................................................................. 28

6.1.2.1 Signalling Gateway Function (SGW) ................................................................................................... 28

6.1.2.2 Media Gateway Control Function (MGCF) .......................................................................................... 28

6.1.2.3 IP Multimedia - Media Gateway Function (IM-MGW) ........................................................................ 28

6.2 Control plane interworking model .................................................................................................................... 29

6.3 User plane interworking model ........................................................................................................................ 29

7 Control plane interworking .................................................................................................................... 29

7.1 General ............................................................................................................................................................. 29

7.2 Interworking between CS networks supporting ISUP and the IM CN subsystem ........................................... 30

7.2.1 Services performed by network entities in the control plane ...................................................................... 30

7.2.1.1 Services performed by the SS7 signalling function .............................................................................. 30

7.2.1.2 Services of the SGW ............................................................................................................................. 30

7.2.1.3 Services of the MGCF ........................................................................................................................... 31

7.2.1.4 Services of the SIP signalling function ................................................................................................. 31

7.2.2 Signalling interactions between network entities in the control plane ........................................................ 31

7.2.2.1 Signalling between the SS7 signalling function and MGCF ................................................................. 31

7.2.2.1.1 Signalling from MGCF to SS7 signalling function ......................................................................... 31

7.2.2.1.2 Signalling from SS7 signalling function to MGCF ......................................................................... 31

7.2.2.1.3 Services offered by SCTP and M3UA ............................................................................................. 31

7.2.2.1.3.1 Services offered by SCTP .......................................................................................................... 31

7.2.2.1.3.2 Services offered by M3UA ........................................................................................................ 31

7.2.2.2 Signalling between the MGCF and SIP signalling function.................................................................. 32

7.2.3 SIP-ISUP protocol interworking ................................................................................................................. 32

7.2.3.1 Incoming call interworking from SIP to ISUP at I-MGCF ................................................................... 32

7.2.3.1.1 Sending of IAM ............................................................................................................................... 32

7.2.3.1.2 Coding of the IAM .......................................................................................................................... 33

7.2.3.1.2.0 General ....................................................................................................................................... 33

7.2.3.1.2.1 Called party number ................................................................................................................... 33

7.2.3.1.2.2 Nature of connection indicators ................................................................................................. 34

7.2.3.1.2.3 Forward call indicators .............................................................................................................. 35

7.2.3.1.2.4 Calling party's category ............................................................................................................. 36

7.2.3.1.2.4A Originating Line Information ..................................................................................................... 36

7.2.3.1.2.5 Transmission medium requirement ............................................................................................ 36

7.2.3.1.2.5a Transmission medium requirement prime and USI prime (optional) ........................................ 38

7.2.3.1.2.6 Calling party number ................................................................................................................. 40

ETSI
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3GPP TS 29.163 version 14.13.0 Release 14 4 ETSI TS 129 163 V14.13.0 (2019-10)

7.2.3.1.2.7 Generic number .......................................................................................................................... 45

7.2.3.1.2.8 User service information ............................................................................................................ 45

7.2.3.1.2.9 Hop Counter (National option) .................................................................................................. 45

7.2.3.1.2.10 Progress Indicator ...................................................................................................................... 46

7.2.3.1.2.11 Location Number ....................................................................................................................... 46

7.2.3.1.2.12 Support of ICS call .................................................................................................................... 48

7.2.3.1.2.13 UID capability indicators (National option) .............................................................................. 48

7.2.3.1.2.14 Called IN number and original called IN number (optional) ..................................................... 49

7.2.3.1.2A Coding of the IAM when Number Portability is supported ............................................................. 49

7.2.3.1.2A.1 Coding of the IAM when a Number Portability Routing Number is available .......................... 49

7.2.3.1.2A.1.1 Separate Directory Number Addressing Method ................................................................. 50

7.2.3.1.2A.1.2 Concatenated Addressing Method ........................................................................................ 51

7.2.3.1.2A.1.3 Separate Network Routing Number Addressing Method ..................................................... 51

7.2.3.1.2A.2 Number Portability Forward Information .................................................................................. 52

7.2.3.1.2B Coding of the IAM for Carrier Routeing ......................................................................................... 52

7.2.3.1.2B.1 Coding of the IAM when a Carrier Identification Code (CIC) is present .................................. 52

7.2.3.1.2B.2 Void ........................................................................................................................................... 52

7.2.3.1.3 Sending of COT ............................................................................................................................... 52

7.2.3.1.3A Sending of SAM .............................................................................................................................. 53

7.2.3.1.3A.1 General ....................................................................................................................................... 53

7.2.3.1.3A.2 Additional digits received in in-dialog SIP INFO requests ........................................................ 53

7.2.3.1.3A.3 Additional digits received in SIP INVITE requests ................................................................... 53

7.2.3.1.4 Sending of 180 ringing .................................................................................................................... 54

7.2.3.1.4.0 General ....................................................................................................................................... 54

7.2.3.1.4.0a PSTN XML body ....................................................................................................................... 55

7.2.3.1.4.0b Fallback by I-MGCF .................................................................................................................. 56

7.2.3.1.4.1 Fallback in a succeeding network: Transmission Medium Used parameter (TMU)

received ...................................................................................................................................... 57

7.2.3.1.4A Sending of 183 Session Progress for early media scenarios ............................................................ 57

7.2.3.1.4B Sending of 181Call is being forwarded ........................................................................................... 60

7.2.3.1.4C Sending of 183 Session Progress for overlap signalling using the in-dialog method ...................... 61

7.2.3.1.4D Sending of 183 Session Progress to carry ISUP Cause ................................................................... 61

7.2.3.1.4E Sending of 183 Session Progress for ICS call ................................................................................. 61

7.2.3.1.5 Sending of the 200 OK (INVITE) ................................................................................................... 62

7.2.3.1.6 Sending of the Release message (REL) ........................................................................................... 64

7.2.3.1.7 Coding of the REL........................................................................................................................... 64

7.2.3.1.8 Receipt of the Release Message ...................................................................................................... 66

7.2.3.1.9 Receipt of RSC, GRS or CGB (H/W oriented) ............................................................................... 70

7.2.3.1.9a Receipt of REFER ........................................................................................................................... 70

7.2.3.1.10 Autonomous Release at I-MGCF .................................................................................................... 71

7.2.3.1.11 Internal through connection of the bearer path ................................................................................ 71

7.2.3.2 Outgoing Call Interworking from ISUP to SIP at O-MGCF ................................................................. 71

7.2.3.2.1 Sending of INVITE ......................................................................................................................... 71

7.2.3.2.1.1 General ....................................................................................................................................... 71

7.2.3.2.1.2 Interaction with continuity check ............................................................................................... 72

7.2.3.2.1.3 IAM without calling party number ............................................................................................ 72

7.2.3.2.1.4 Terminating overlap signalling at MGCF .................................................................................. 73

7.2.3.2.1.5 Fallback (optional) ..................................................................................................................... 73

7.2.3.2.1a Sending of INVITE without determining the end of address signalling .......................................... 74

7.2.3.2.1a.1 General ....................................................................................................................................... 74

7.2.3.2.1a.2 Additional digits sent with in-dialog overlap method ................................................................ 74

7.2.3.2.1a.3 Additional digits sent using the multiple INVITEs overlap method .......................................... 75

7.2.3.2.2 Coding of the INVITE ..................................................................................................................... 76

7.2.3.2.2.0 Overview .................................................................................................................................... 76

7.2.3.2.2.1 Request-URI and To header field .............................................................................................. 76

7.2.3.2.2.2 SDP Media Description ............................................................................................................. 77

7.2.3.2.2.3 P-Asserted-Identity, From and Privacy header fields ................................................................ 81

7.2.3.2.2.3A "cpc" URI Parameter in P-Asserted-Identity Header ................................................................. 86

7.2.3.2.2.3B "oli" URI Parameter in P-Asserted-Identity Header .................................................................. 86

7.2.3.2.2.4 Max Forwards header ................................................................................................................ 87

7.2.3.2.2.5 IMS Communication Service Identifier ..................................................................................... 87

7.2.3.2.2.6 P-Early-Media header field ........................................................................................................ 87

ETSI
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3GPP TS 29.163 version 14.13.0 Release 14 5 ETSI TS 129 163 V14.13.0 (2019-10)

7.2.3.2.2.7 PSTN XML elements ................................................................................................................. 87

7.2.3.2.2.8 Progress indicator ...................................................................................................................... 88

7.2.3.2.2.9 P-Access-Network-Info ............................................................................................................. 89

7.2.3.2.2A Coding of the INVITE when Number Portability is supported ....................................................... 89

7.2.3.2.2A.1 Request-URI and To header field .............................................................................................. 89

7.2.3.2.2A.1.1 Separate Directory Number Addressing Method ................................................................. 90

7.2.3.2.2A.1.2 Concatenated Addressing Method ........................................................................................ 90

7.2.3.2.2A.1.3 Separate Network Routing Number Addressing Method ..................................................... 91

7.2.3.2.2B Coding of the INVITE for Carrier Routeing ................................................................................... 91

7.2.3.2.2B.1 Mapping of "cic" in Request-URI .............................................................................................. 91

7.2.3.2.2B.2 Void ........................................................................................................................................... 91

7.2.3.2.2C Coding of INVITE with instance-id in form of IMEI URN ............................................................ 91

7.2.3.2.2.10 PSAP Call-back indication ........................................................................................................ 92

7.2.3.2.2.11 History-Info header field (optional) ........................................................................................... 92

7.2.3.2.3 Receipt of CONTINUITY ............................................................................................................... 92

7.2.3.2.4 Sending of ACM and awaiting answer indication ........................................................................... 93

7.2.3.2.5 Coding of the ACM ......................................................................................................................... 95

7.2.3.2.5.0 General ....................................................................................................................................... 95

7.2.3.2.5.1 Backward call indicators ............................................................................................................ 95

7.2.3.2.5.2 Optional Backward call indicators ............................................................................................. 97

7.2.3.2.5.3 Access Transport Parameter, Transmission medium used parameter ........................................ 97

7.2.3.2.5.4 Progress indicator ...................................................................................................................... 98

7.2.3.2.5.5 Cause Value ............................................................................................................................... 98

7.2.3.2.6 Sending of the Call Progress message (CPG) .................................................................................. 98

7.2.3.2.6.0 General ....................................................................................................................................... 98

7.2.3.2.6.1 Handling of the progress indicator ........................................................................................... 100

7.2.3.2.7 Coding of the CPG ........................................................................................................................ 100

7.2.3.2.7.0 General ..................................................................................................................................... 100

7.2.3.2.7.1 Event information .................................................................................................................... 101

7.2.3.2.7.2 Access Transport Parameter..................................................................................................... 101

7.2.3.2.7.3 Void ......................................................................................................................................... 101

7.2.3.2.7.4 Handling of Backward Call indicators ..................................................................................... 101

7.2.3.2.7.5 Optional Backward call indicators ........................................................................................... 101

7.2.3.2.7.6 Cause Value ............................................................................................................................. 101

7.2.3.2.7a Receipt of 200 OK(INVITE) ......................................................................................................... 102

7.2.3.2.7b Internal through connection of the bearer path .............................................................................. 102

7.2.3.2.8 Sending of the Answer Message (ANM) ....................................................................................... 102

7.2.3.2.9 Coding of the ANM ....................................................................................................................... 102

7.2.3.2.9.1 Backwards Call Indicators ....................................................................................................... 102

7.2.3.2.9.2 Access Transport Parameter..................................................................................................... 102

7.2.3.2.9.3 Transmission Medium Used parameter (TMU) ....................................................................... 103

7.2.3.2.10 Sending of the Connect message (CON) ....................................................................................... 104

7.2.3.2.11 Coding of the CON ........................................................................................................................ 104

7.2.3.2.11.0 General ..................................................................................................................................... 104

7.2.3.2.11.1 Backward call indicators .......................................................................................................... 104

7.2.3.2.11.2 Access Transport Parameter..................................................................................................... 104

7.2.3.2.11.3 Transmission medium used parameter ..................................................................................... 104

7.2.3.2.11A Receipt of a reINVITE request ...................................................................................................... 104

7.2.3.2.12 Receipt of Status Codes 4xx, 5xx or 6xx ....................................................................................... 104

7.2.3.2.12.1 Special handling of 404 Not Found and 484 Address Incomplete responses after sending

of INVITE without determining the end of address signalling ................................................ 107

7.2.3 2.13 Receipt of a BYE ........................................................................................................................... 107

7.2.3.2.14 Receipt of the Release Message .................................................................................................... 107

7.2.3.2.15 Receipt of RSC, GRS or CGB (H/W oriented) ............................................................................. 107

7.2.3.2.16 Autonomous Release at O-MGCF ................................................................................................. 108

7.2.3.2.17 Special handling of
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