TS 23.231 ★
SIP-I based Circuit-Switched Core Network

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V16.0.0 (PDF) 2020/06 76 p.

V15.0.0 2018/06 73 p.

V14.0.0 2017/03 76 p.

V13.0.0 2015/12 75 p.

V12.0.0 2013/12 75 p.

V11.1.1 2012/11 75 p.

V10.0.0 2011/04 75 p.

V9.0.0 2009/12 75 p.

V8.4.0 2009/06 75 p.

Rapporteur:: Mrs. Biondic, Nevenka Ericsson LM

essential Table of Contents for TS 23.231 Word version: 16.0.0

each title, in the "available" or "not available yet" area, links to the equivalent title in the CONTENT

2 References Word‑p. 9

3 Definitions, symbols and abbreviations Word‑p. 10

4 Main Concepts Word‑p. 11

4.1 General Word‑p. 11

4.2 Call Control Word‑p. 12

4.3 H.248 Word‑p. 12

4.4 MGW Selection Word‑p. 12

4.4.1 Principles Word‑p. 12

4.4.2 Optimised MGW Selection Word‑p. 13

4.4.3 Deferred MGW selection Word‑p. 14

4.4.4 Mobile to Mobile Call Word‑p. 15

4.4.5 MGW bypass Word‑p. 16

5 General Circuit Switched Core Network Domain Architecture Word‑p. 18

6 Call Establishment Word‑p. 19

6.1 Basic Mobile Originating Call Word‑p. 19

6.1.1 Basic Mobile Originating Call Establishment with immediate MGW selection Word‑p. 19

6.1.2 Originating Call Establishment For Iu Interface on IP with immediate MGW selection Word‑p. 23

6.1.3 Originating Call Establishment For A Interface user plane over IP with immediate MGW selection Word‑p. 24

6.2 Basic Mobile Terminating Call Word‑p. 25

6.2.1 Basic Mobile Terminating Call Establishment with immediate MGW selection Word‑p. 25

6.2.2 Terminating Call Establishment For Iu Interface on IP with immediate MGW selection Word‑p. 32

6.2.3 Terminating Call Establishment For A Interface user plane over IP with immediate MGW selection Word‑p. 32

7 Call Clearing Word‑p. 33

7.1 General Word‑p. 33

7.2 Visited MSC Server Procedures Word‑p. 34

7.2.1 Call Clearing when Visited MSC Server has Forwarded/Deflected Call Word‑p. 34

7.2.2 Call Clearing received from core network Word‑p. 34

7.2.3 Call Clearing received from UE Word‑p. 36

7.2.4 Call Clearing initiated by V-MSC Server Word‑p. 39

7.2.5 Call clearing received from MGW Word‑p. 40

7.2.6 Call Clearing procedures towards MGW Word‑p. 42

7.2.7 Call Clearing for Iu Interface on IP Word‑p. 42

7.3 Gateway MSC Server Procedures Word‑p. 42

7.3.1 Call Clearing received from peer SIP-I node Word‑p. 42

7.3.2 Call Clearing initiated by G-MSC Server Word‑p. 43

7.3.3 Call Clearing received from MGW Word‑p. 43

7.3.4 Call Clearing procedures towards MGW Word‑p. 44

8 Handover/Relocation Word‑p. 44

8.1 UMTS to UMTS Word‑p. 44

8.2 UMTS to GSM Word‑p. 45

8.3 GSM to UMTS Word‑p. 46

8.4 GSM to GSM Word‑p. 47

9 Compatibility Issues Word‑p. 48

9.1 Compatibility Issues for Nc Interface Word‑p. 48

9.2 Compatibility Issues for Mc Interface Word‑p. 48

10 General (G)MSC server-MGW Procedures Word‑p. 48

10.1 MGW Unavailable Word‑p. 48

10.2 MGW Available Word‑p. 48

10.3 MGW Recovery Word‑p. 48

10.4 (G)MSC server Recovery Word‑p. 48

10.5 MGW Re-register Word‑p. 48

10.6 MGW Re-registration Ordered by (G)MSC server Word‑p. 48

10.7 Removal from Service of a Physical Termination Word‑p. 48

10.8 Restoration to Service of a Physical Termination Word‑p. 49

10.9 Audit of MGW Word‑p. 49

10.10 MGW Capability Change Word‑p. 49

10.11 (G)MSC Server Out of service Word‑p. 49

10.12 MGW Resource Congestion Handling - Activate Word‑p. 49

10.13 MGW Resource Congestion Handling -Indication Word‑p. 49

10.14 Control association monitoring Word‑p. 49

10.15 Hanging termination detection Word‑p. 49

11 Identities Word‑p. 49

11.1 Telephone numbering schemes Word‑p. 49

11.2 (G)MSC Server Identity Word‑p. 49

11.3 Sub-addressing Word‑p. 49

12 Operational Aspects Word‑p. 50

12.1 Charging Word‑p. 50

12.2 SIP session continuity Word‑p. 50

13 Interactions with Other Services Word‑p. 51

13.1 Enhanced Multi-Level Precedence and Pre-emption service (eMLPP) Word‑p. 51

13.2 Call Deflection Service Word‑p. 51

13.3 Line identification Services Word‑p. 51

13.4 Call Forwarding Services Word‑p. 52

13.5 Call Waiting (CW) Word‑p. 54

13.6 Call Hold (CH) Word‑p. 54

13.7 Multiparty (MPTY) Word‑p. 55

13.8 Closed User Group (CUG) Word‑p. 58

13.9 Advice of Charge (AoC) Word‑p. 58

13.10 User-to-User Signalling (UUS) Word‑p. 59

13.11 Call Barring Services Word‑p. 59

13.12 Explicit Call Transfer (ECT) Word‑p. 59

13.13 Completion of Calls to Busy Subscriber (CCBS) Word‑p. 60

13.14 Multiple Subscriber Profile (MSP) Word‑p. 60

13.15 Multicall Word‑p. 60

13.16 Calling Name Presentation (CNAP) Word‑p. 60

13.17 Alternate Speech/Fax Word‑p. 60

13.18 Modification of the Access Bearer Word‑p. 61

13.19 GSM Fax Word‑p. 61

13.20 Voice group call service (VGCS), Voice broadcast service (VBS) Word‑p. 61

14 Interactions with Other Network Features and Services Word‑p. 61

14.1 Customised Applications for Mobile network Enhanced Logic (CAMEL) Word‑p. 61

14.2 IST Word‑p. 62

14.3 Operator Determined Barring (ODB) Word‑p. 62

14.4 DTMF Word‑p. 62

14.5 OR Word‑p. 67

14.6 Providing tones or announcements Word‑p. 67

14.7 Global Text Telephony Word‑p. 68

14.8 Emergency Calls Word‑p. 68

14.9 Subscriber and equipment trace Word‑p. 68

14.10 Customized Alerting Tones Word‑p. 68

15 Messages/Procedures and their contents Word‑p. 69

16 Bearer Redirect Word‑p. 71

17 (G)MSC MGW Tandeming Word‑p. 71

18 Timers for SIP-I based CS core network Word‑p. 72

19 Multiple IP Realms Word‑p. 72

$ Change history Word‑p. 73

TS 23.231 ★ SIP-I based Circuit-Switched Core Network

essential Table of Contents for TS 23.231 Word version: 16.0.0

TS 23.231 ★
SIP-I based Circuit-Switched Core Network