Tech-invite 3GPPspace IETFspace

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Content for TS 29.164 Word version: 18.0.0

1… 6…

6.1 General 6.2 Interworking between CS Domain using ISUP signalling and external network using SIP-I signalling 6.3 Interworking between CS Domain using BICC signalling and external network using SIP-I signalling 6.4 Supplementary services 7.1 ISUP based CS Domain 7.2 BICC based CS Domain 8.1 Overview 8.2 Signalling interactions 8.3 Signalling procedures

6 Control plane interworking p. 9

6.1 General p. 9

6.2 Interworking between CS Domain using ISUP signalling and external network using SIP-I signalling p. 10

6.2.1 Control Plane Interworking p. 10

6.2.2 Services performed by network entities in the control plane p. 11

6.2.2.1 Services of the IWU p. 11

6.2.2.2 Services of the external SIP-I signalling function p. 11

6.2.3 Signalling interactions between network entities in the control plane p. 11

6.2.3.1 Signalling between the IWU and SIP-I signalling function p. 11

6.2.4 SIP-ISUP protocol interworking p. 11

6.2.4.1 Incoming call interworking from SIP-I to ISUP at I-IWU p. 11

6.2.4.1.0 General p. 11

6.2.4.1.1 Interworking of received ISUP messages to SIP messages p. 11

6.2.4.1.2 Receipt of encapsulated ISUP information within SIP p. 12

6.2.4.1.3 Special Procedures for the Reception of SIP INVITE request p. 12

6.2.4.1.3.1 Propagation of overlap signalling toward the 3GPP CS domain p. 12

6.2.4.1.3.2 Derivation of TMR, USI and HLC parameters within send IAM message p. 12

6.2.4.1.3.3 Receipt of SIP INVITE without SDP offer p. 12

6.2.4.2 Outgoing Call Interworking from ISUP to SIP-I at O-IWU p. 13

6.2.4.2.1 General p. 13

6.2.4.2.2 Sending of ISUP information to adjacent SIP nodes p. 13

6.2.4.2.3 Receipt of encapsulated ISUP information within SIP-I p. 13

6.2.4.2.4 Special procedures related to outgoing INVITE p. 14

6.2.4.2.4.1 Overlap Signalling p. 14

6.2.4.2.4.2 Coding of encapsulated ISUP IAM parameters in outgoing INVITE p. 14

6.2.4.2.4.3 Media offered in SDP of outgoing INVITE p. 14

6.3 Interworking between CS Domain using BICC signalling and external network using SIP-I signalling p. 14

6.3.1 Control Plane Interworking p. 14

6.3.2 SIP-BICC protocol interworking p. 15

6.3.2.1 General p. 15

6.3.2.2 Incoming call interworking from SIP to BICC at I-IWU p. 15

6.3.2.3 Outgoing Call Interworking from BICC to SIP at O-IWU p. 15

6.4 Supplementary services p. 15

6.4.1 Special procedures for supplementary service interworking p. 15

6.4.2 Interworking of CLIP/CLIR supplementary service p. 16

6.4.3 Interworking of Call Hold (HOLD) supplementary service p. 16

6.4.4 Interworking of Completion of Calls to Busy Subscriber (CCBS) supplementary service to SIP networks p. 16

7 User plane Interworking p. 16

7.1 ISUP based CS Domain p. 16

7.2 BICC based CS Domain p. 16

8 Interactions between control node and MGW p. 17

8.1 Overview p. 17

8.2 Signalling interactions p. 17

8.2.1 Backward through-connection for outgoing call interworking from BICC to SIP at O-IWU. p. 17

8.2.2 Handling of RTP telephone events p. 17

8.3 Signalling procedures p. 18

A (Normative) Codec Negotiation between a BICC based CS Domain and an external SIP-I network p. 19

$ Change History p. 20