TR 29.802
(G)MSC-S - (G)MSC-S Nc Interface based on the SIP-I protocol
V7.0.0 (Wzip)
2007/06 69 p.
- Rapporteur:
- Mr. Hutton, David
GSM Association
full Table of Contents for TR 29.802 Word version: 7.0.0
1 Scope p. 7
The present document provides a study into providing a SIP-I based Nc interface (G)MSC-S - (G)MSC-S as an alternative to the existing BICC definition. The document covers the functional description, network architecture and protocol definition for the SIP-I based solution. The contents of this report when stable shall be moved into a Technical Specification 3GPP TS ab.cde along with modifications to existing specifications.
2 References p. 7
3 Definitions, symbols and abbreviations p. 10
4 Overview p. 11
4.1 Background p. 11
4.2 Functional Impacts p. 12
5 Basic Principles p. 13
5.1 Introduction p. 13
5.2 Definition of a 3GPP SIP-I Profile p. 14
5.2.1 General p. 14
5.2.2 Initial profile p. 14
5.2.3 SIP-I profile options p. 15
5.2.3.1 Support for 100rel p. 15
5.2.3.1.1 Requirements on Nc Interface p. 15
5.2.3.1.2 Requirements for interworking to external SIP-I networks p. 15
5.2.3.2 Support for UPDATE method p. 16
5.2.3.2.1 Requirements on Nc interface p. 16
5.2.3.2.2 Requirements for interworking to external SIP-I networks p. 16
5.2.3.3 Support for Preconditions p. 17
5.2.3.3.1 Requirements on Nc Interface p. 17
5.2.3.3.2 Requirements for interworking to external SIP-I networks p. 18
5.2.3.4 Support for INVITE request without SDP p. 18
5.2.3.5 Support for SDP with unspecified connection address p. 19
5.2.3.5.1 Requirements on Nc Interface p. 19
5.2.3.5.2 Requirements for interworking with external SIP-I networks p. 19
5.2.3.6 SIP session continuity p. 19
5.3 Transport p. 20
5.4 Impacts on the Bearer Plane p. 21
5.5 Support of Media Description p. 22
5.6 Bearer Establishment Models p. 22
5.7 Codec Negotiation p. 23
5.7.1 Codec Negotiation Offer/Answer Model p. 23
5.7.1.1 Sub-Proposals for Codec Negotiation Option 2 p. 25
5.7.1.1.1 Option 2 Sub-Proposal 1 p. 25
5.7.1.1.2 Option 2 Sub-Proposal 2 p. 27
5.7.1.1.3 Comparison of Codec Negotiation Sub-Proposals p. 29
5.7.1.2 Conclusion of Codec Negotiation Offer/Answer Model p. 29
5.7.1.2.1 General p. 29
5.7.1.2.2 3GPP Node Originating SDP Offer p. 29
5.7.1.2.3 3GPP Node Terminating SDP Offer p. 29
5.7.1.2.4 Intermediate Node Receiving SDP Offer p. 30
5.7.1.2.5 3GPP Intermediate Node Receiving SDP Answer p. 30
5.7.1.2.6 Semantics of 3GPP OoBTC Indicator p. 30
5.7.1.2.7 Encoding of 3GPP OoBTC Indicator p. 31
5.7.1.2.8 Codec Negotiation Example Sequences p. 31
5.7.2 Offer Answer Rules p. 37
5.7.2.1 General p. 37
5.7.2.2 Rules for Constructing an Offer p. 37
5.7.2.3 Rules for Constructing an Answer p. 38
5.7.3 Supported Codecs and Call Events p. 38
5.8 Usage of URI schemas in the Nc interface p. 39
6 IP Version p. 40
7 Security p. 40
8 Call Establishment p. 40
8.1 Basic Mobile Originating Call p. 40
8.1.1 Basic Mobile Originating Call Establishment p. 40
8.1.1.1 MGW selection p. 40
8.1.1.2 Initial INVITE message p. 40
8.1.1.3 Network side bearer establishment p. 40
8.1.1.4 Access bearer assignment p. 41
8.1.1.5 Through-Connection p. 41
8.1.1.6 Confirmation of bearer establishment p. 41
8.1.1.7 Interworking function p. 41
8.1.1.8 Codec handling p. 41
8.1.1.9 Voice Processing function p. 41
8.1.1.10 Failure handling in MSC server p. 41
8.1.1.11 Example p. 41
8.1.2 Originating Call Establishment For Iu Interface on IP p. 44
8.2 Basic Mobile Terminating Call p. 45
8.2.1 Basic Mobile Terminating Call Establishment p. 45
8.2.1.1 GMSC server p. 45
8.2.1.1.1 MGW selection p. 45
8.2.1.1.2 Initial INVITE message p. 45
8.2.1.1.3 Outgoing side bearer establishment p. 45
8.2.1.1.4 Incoming side bearer establishment p. 46
8.2.1.1.5 Through-Connection p. 46
8.2.1.1.6 Confirmation of bearer establishment p. 46
8.2.1.1.7 Voice Processing function p. 46
8.2.1.1.8 Failure handling in GMSC server p. 46
8.2.1.2 MSC server p. 46
8.2.1.2.1 Paging p. 46
8.2.1.2.2 Call setup p. 46
8.2.1.2.3 MGW selection p. 46
8.2.1.2.4 Network side bearer establishment p. 46
8.2.1.2.5 Access bearer assignment p. 47
8.2.1.2.6 Framing protocol initialisation p. 47
8.2.1.2.7 Called party alerting p. 47
8.2.1.2.8 Called party answer p. 47
8.2.1.2.9 Through-Connection p. 47
8.2.1.2.10 Interworking function p. 47
8.2.1.2.11 Codec handling p. 47
8.2.1.2.12 Voice Processing function p. 47
8.2.1.2.13 Failure handling in MSC server p. 47
8.2.1.2.14 Example - the GMSC selects a MGW p. 47
8.2.2 Terminating Call Establishment For Iu Interface on IP p. 51
9 Mid Call Codec Negotiation p. 51
9.1 Network Initiated p. 51
9.2 User Initiated p. 51
10 Call Clearing p. 51
10.1 Network Initiated p. 52
10.1.1 GMSC server p. 52
10.1.2 MSC server p. 53
10.2 User Initiated p. 54
10.3 (G)MSC server Initiated p. 54
10.3.1 GMSC server p. 54
10.3.1.1 Call clearing to the destination side p. 54
10.3.1.2 Call clearing to the originating side p. 54
10.3.2 MSC server p. 55
10.4 MGW Initiated p. 55
10.4.1 GMSC server p. 55
10.4.1.1 Bearer released on the destination side p. 55
10.4.1.2 Bearer released on the originating side p. 55
10.4.2 MSC server p. 55
10.5 Call Clearing for Iu Interface on IP p. 55
11 Handover/Relocation p. 55
11.1 UMTS to UMTS p. 56
11.1.1 Intra-MSC SRNS/SBSS Relocation p. 56
11.1.2 Basic Inter-MSC SRNS/SBSS Relocation p. 56
11.1.3 Subsequent Inter-MSC SRNS/SBSS Relocation back to the Anchor MSC p. 56
11.1.4 Subsequent Inter-MSC SRNS/SBSS Relocation to a third MSC p. 56
11.1.5 SRNS/SBSS Relocation with Iu on IP p. 56
11.2 UMTS to GSM p. 56
11.3 GSM to UMTS p. 57
11.4 GSM to GSM p. 57
12 Impact to existing services p. 57
12.1 Supplementary Services p. 57
12.2 Number Portability p. 61
12.3 SCUDIF p. 61
12.4 GTT p. 62
12.5 Impacts on Data Call Handling p. 62
12.6 Support of DTMF p. 64
12.7 Impacts on Call Deflection Service p. 64
12.8 Impacts on Call Forwarding Services p. 65
12.9 Impacts on Call Hold p. 65
12.10 Impacts on GSM Fax p. 65
12.11 Impacts on Bearer Redirection p. 65
13 Interworking between SIP-I based 3GPP CS Domain and BICC based 3GPP CS Domain p. 65
14 Interworking between SIP-I based 3GPP CS Domain and 3GPP IP Multimedia Subsystem p. 65
15 Impacts to Messages/Procedures and their contents p. 66
15.1 Impacts to Messages between (G)MSC servers p. 66
15.2 Impacts to Procedures between (G)MSC server and MGW p. 67
16 Conclusion and Recommendations p. 68
A Impacts to Existing Specifications p. 68
$ Change History p. 68
