ETSI TS 103 161-16 V1.1.1 (2011-04)

Technical Specification
Access, Terminals, Transmission and Multiplexing (ATTM);
Integrated Broadband Cable and Television Networks;
IPCablecom 1.5;
Part 16: Signalling for Call Management Server

2 ETSI TS 103 161-16 V1.1.1 (2011-04)

Reference
DTS/ATTM-003011-16
Keywords
access, broadband, cable, IP, multimedia, PSTN
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ETSI
3 ETSI TS 103 161-16 V1.1.1 (2011-04)
Contents
Intellectual Property Rights . 8
Foreword . 8
1 Scope . 10
2 References . 10
2.1 Normative references . 10
2.2 Informative references . 12
3 Definitions and abbreviations . 13
3.1 Definitions . 13
3.2 Abbreviations . 14
4 Void . 15
5 Background and motivation . 15
5.1 Requirements and Design Principles . 16
5.2 IPCablecom Architecture . 16
5.3 CMSS Trust Model . 18
5.4 CMS to CMS Architectural Model . 19
5.5 Overview of CMS Behaviour . 21
5.6 Basic Telephony Call Flow . 21
5.7 CMS-MGC Basic Telephony Call Flow . 23
6 SIP PROFILE . 26
6.1 Introduction . 26
6.2 Overview of SIP Functionality . 26
6.3 Terminology . 26
6.4 Overview of Operation . 26
6.5 Structure of the Protocol . 26
6.6 Definitions . 26
6.7 SIP Messages . 26
6.7.1 Requests . 27
6.7.2 Responses . 27
6.7.3 Header Fields . 27
6.7.4 Bodies . 27
6.7.4.1 Message Body Types . 27
6.7.4.2 Message Body Length . 27
6.7.5 Framing SIP Messages. 27
6.8 General User Agent Behaviour . 27
6.8.1 UAC Behaviour . 27
6.8.1.1 Generating the Request . 28
6.8.1.2 Processing Responses. 28
6.8.2 UAS Behaviour . 29
6.8.3 Redirect Servers . 29
6.9 Cancelling a Request . 29
6.10 Registrations . 29
6.11 Querying for Capabilities . 29
6.12 Dialogs . 29
6.13 Initiating a Session . 29
6.14 Modifying an Existing Session . 29
6.15 Terminating a Session . 29
6.16 Proxy Behaviour . 29
6.17 Transactions . 30
6.18 Transport . 30
6.19 Common Message Components . 30
6.19.1 SIP URI Component . 30
6.20 Header Fields . 30
6.20.1 Accept . 31
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4 ETSI TS 103 161-16 V1.1.1 (2011-04)
6.20.2 Accept-Encoding . 31
6.20.3 Accept-Language . 31
6.20.4 Alert-Info . 31
6.20.5 Allow . 31
6.20.6 Authentication-Info . 31
6.20.7 Authorization . 32
6.20.8 Call-ID . 32
6.20.9 Call-Info . 32
6.20.10 Contact . 32
6.20.11 Content-Disposition . 32
6.20.12 Content-Encoding . 33
6.20.13 Content-Language . 33
6.20.14 Content-Length . 33
6.20.15 Content-Type . 33
6.20.16 CSeq. 33
6.20.17 Date . 33
6.20.18 Error-Info . 33
6.20.19 Expires . 33
6.20.20 From. 33
6.20.21 In-Reply-To . 34
6.20.22 Max-For wards . 34
6.20.23 Min-Expires . 34
6.20.24 MIME-Version . 34
6.20.25 Organization . 34
6.20.26 Priority . 34
6.20.27 Proxy-Authenticate . 34
6.20.28 Proxy-Authorization . 34
6.20.29 Proxy-Require . 34
6.20.30 Record-Route . 35
6.20.31 Reply-To . 35
6.20.32 Require . 35
6.20.33 Retry-After . 35
6.20.34 Route . 35
6.20.35 Server . 35
6.20.36 FSubject . 35
6.20.37 Supported . 35
6.20.38 Timestamp . 35
6.20.39 To . 35
6.20.40 Unsupported . 36
6.20.41 User-Agent . 36
6.20.42 Via . 36
6.20.43 Warning . 36
6.20.44 WWW-Authenticate . 36
6.21 Response Codes . 37
6.22 Usage of HTTP Authentication . 37
6.23 S/MIME . 37
6.24 Examples . 37
6.25 Augmented BNF for the SIP Protocol . 37
6.26 Security Considerations: Threat Model and Security Usage Recommendations. 37
6.27 Table of Timer Values . 37
7 SIP Extensions . . 38
7.1 URIs for Telephone Calls . 39
7.1.1 Routing Number, Number Portability, Carrier Identification Code and Dial Around Indication
Number . 39
7.1.2 Procedures at an Originating CMS . 40
7.1.3 Procedures at a Terminating CMS . 40
7.1.4 Procedures at Proxy . 40
7.2 Reliability of Provisional Responses . 40
7.3 SIP UPDATE Method . 40
7.4 Integration of Resource Management and SIP . 41
7.4.1 Procedures at an Originating CMS . 41
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5 ETSI TS 103 161-16 V1.1.1 (2011-04)
7.4.1.1 Default Operation Using QoS Preconditions Strength "Optional" . 41
7.4.1.2 QoS Preconditions Strength "None" . 41
7.4.1.3 QoS Preconditions Strength "Mandatory". 41
7.4.2 Procedures at a Terminating CMS . 41
7.4.2.1 QoS Preconditions Strength "None" or "Optional" . 41
7.4.2.2 QoS Preconditions Strength "Mandatory". 42
7.5 SIP-Specific Event Notification . 42
7.6 The REFER Method . 42
7.6.1 Procedures at an Originating CMS . 42
7.6.2 Procedures at a Terminating CMS . 42
7.7 SIP Proxy to Proxy Extensions for Supporting DCS . 43
7.7.1 P-DCS-Trace-Party-ID . 43
7.7.2 P-DCS-LAES and P-DCS-REDIRECT . 43
7.7.2.1 P-DCS-LAES Header. 43
7.7.2.2 Surveillance Procedures at Originating CMS . 43
7.7.2.2.1 CMS Receives REFER Request or Redirect Response . 44
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7.7.2.3 Surveillance Procedures at Terminating CMS . 46
7.7.2.3.1 Terminating Line is Able to Accept the Call . 46
7.7.2.3.2 Terminating Line is Unable to Accept the Call . 46
7.7.2.3.3 Terminating CMS is Unable to Perform Call-Content Surveillance . 47
7.7.2.3.4 Terminating CMS Redirects or Transfers the Call . 47
7.7.2.4 Surveillance Procedures at a CMS Proxy . 48
7.7.2.5 Interworking with CSCFs . 49
7.7.3 P-DCS-Billing-Info . 49
7.7.3.1 Procedures at an Originating CMS . 49
7.7.3.2 Procedures at a Terminating CMS . 49
7.7.3.3 Procedures at a Proxy . 49
7.7.3.4 Interaction with CSCF Signaling Nodes . 49
7.7.3.4.1 Sessions initiated from a CSCF to a CMS or MGC . 50
7.7.3.4.2 Sessions initiated from a CMS or MGC to a CSCF . 50
7.7.4 P-DCS Option Tag . 51
7.8 The SIP "Replaces" Header . 51
7.9 Private Extensions to the SIP Protocol for Asserted Identity within Trusted Networks . 51
7.10 A Message Summary and Message Waiting Indication Event Package for the Session Initiation Protocol
(SIP) . 52
7.11 Globally Routable User Agent URI (GRUU) . 52
7.12 The Early Session Disposition Type for SIP . 52
7.13 An Extension to the Session Initiation Protocol (SIP) for Request History Information . 53
7.14 Request Authorization through Dialog Identification in the Session Initiation Protocol (SIP) . 53
7.15 The Session Initiation Protocol (SIP) Join Header . 53
7.16 SUBSCRIBE to Dialog Event Package . 53
8 CMS-CMS SIGNALING . 53
8.1 CMS Interfaces . 53
8.1.1 Overview of CMS Behaviour . 55
8.1.1.1 CMS Behaviour in Support of Call Originator . 55
8.1.1.2 CMS Behaviour in Support of Call Destination . 56
8.1.1.3 CMS Behaviour in Support of Mid-call Changes . 56
8.1.1.4 CMS Behaviour in Support of Event Messaging . 56
8.1.1.5 CMS Behaviour in Support of Call Forwarding. 57
8.1.1.6 CMS Behaviour in Support of Inter-Domain Call Forwarding . 57
8.1.1.7 CMS Behaviour in Support of REFER . 58
8.1.1.8 CMS Behaviour in Support of Inter-Domain REFER . 59
8.1.2 Overview of Tandem Proxy . 59
8.2 CMS Retransmission, Reliability and Recovery Strategies . 59
8.3 CMS to CMS Routing . 60
8.3.1 Forming a SIP-URI from a tel-URI . 60
8.3.2 Routing a SIP(s) URI at Tandem CMSs . 61
8.3.3 Routing based on tel-URI . 61
8.4 CMS Procedures . 61
8.4.1 CMS Messages and Procedures for Basic Call Setup . 61
8.4.1.1 CMS initiating Invite . 62
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8.4.1.1.1 CMS Authentication and Authorization of Originator . 63
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8.4.1.1.2 Address Translation . 63
8.4.1.1.3 IP Address Privacy Support . 64
8.4.1.1.4 INVITE message generation . 64
8.4.1.2 Invite from CMS arrives at CMS . 65
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8.4.1.2.1 CMS Sending 183-Session-Progress Status Response . 66
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8.4.1.2.2 CMS Sending 3xx REDIRECT Status Response . 67
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8.4.1.2.3 CMS Sending INVITE Request to CMS . 68
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8.4.1.2.4 CMS Sending Other Status Response to INVITE request . 70
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8.4.1.3 CMS Receives Initial Status Response . 70
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8.4.1.3.1 CMS handling of 183-Session-Progress Response . 71
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8.4.1.3.2 302-Redirect Status Response Handling at CMS . 74
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8.4.1.4 CMS Receiving Acknowledgement of 183-Session-Progress . 76
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8.4.1.5 CMS sends 180-Ringing or 183-Session-Progress . 78
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8.4.1.6 CMS receives 180-Ringing or 183-Session-Progress . 79
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8.4.1.7 CMS Sending final Response . 81
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8.4.1.7.1 CMS sending 200-OK Final Response . 81
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8.4.1.7.2 CMS sending 3xx-Redirect Final Response. 82
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8.4.1.7.3 Other Status Response to INVITE Request . 83
8.4.1.8 CMS Receives Final Response from CMS . 84
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8.4.1.8.1 CMS Receiving 200-OK. 84
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8.4.1.8.2 CMS receiving 302-Redirect . 85
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8.4.1.8.3 CMS receiving other error response . 87
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8.4.1.9 Session Timer expiration at CMS . 87
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8.4.2 Emergency Call Procedures . 88
8.4.2.1 Network Hold Support . 88
8.4.2.2 PSAP Operator Ringback . 90
8.4.2.2.1 PSAP Operator Ringback while Network Hold not Applied (Caller Off-Hook) . 90
8.4.2.2.2 PSAP Operator Ringback while Network Hold Applied (Caller On-Hook) . 90
8.4.2.3 PSAP CallBack (PSAP Originated Emergency Call) . 91
8.4.2.4 MGC Procedures . 92
8.4.2.4.1 Invite processing . 92
8.4.2.4.2 Network Hold processing . 93
8.4.2.4.3 PSAP Ringback processing . 93
8.4.2.4.4 PSAP Callback (PSAP Originated Emergency Call) . 93
8.4.3 CMS Procedures for REFER . 94
8.4.3.1 CMS Initiates REFER Request . 94
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8.4.3.2 CMS Receives REFER . 95
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8.4.3.3 CMS Receives Final Response to REFER . 96
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8.4.3.4 CMS Receives Initial NOTIFY for REFER . 96
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8.4.3.5 CMS Sends INVITE to Target . 97
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8.4.3.6 CMS Sends Final NOTIFY To CMS . 98
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8.4.3.7 CMS Receives NOTIFY . 98
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8.4.3.8 CMS Receives Final Response To NOTIFY . 99
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8.4.4 CMS handling of Mid-Call Changes . 99
8.4.4.1 CMS Initiating Call Hold: re-INVITE/UPDATE(hold) . 99
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8.4.4.2 CMS Resuming a held call: UPDATE(resume) . 100
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8.4.4.3 CMS Receiving Call Hold: UPDATE(hold) and UPDATE(resume) . 101
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8.4.4.4 SIP Messages for Codec Changes - INVITE/UPDATE(Codec-change) . 101
8.4.4.4.1 Codec Change within Previous Authorization . 102
8.4.4.4.2 Codec Change Requiring New Authorization . 103
8.4.5 CMS handling of Call Teardown . 105
8.4.6 Sample Implementation of Call Transfer . 106
8.4.7 Sample Implementation of Ad-hoc Conference . 112
8.4.8 Automatic Recall and Callback . 112
8.4.8.1 CMS Sends INVITE to Target . 112
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8.4.8.2 CMS Sends SUBSCRIBE to Target . 113
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8.4.8.3 CMS Sends NOTIFY to CMS . 114
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8.4.8.4 INVITE from IPCablecom to PSTN . 115
8.4.8.5 Initial Query Request from PSTN to IPCablecom . 116
8.4.9 Message Waiting Indicator . 116
8.4.9.1 CMSI Sends SUBSCRIBE to CMSR . 117
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7 ETSI TS 103 161-16 V1.1.1 (2011-04)
8.4.9.2 CMSR Sends NOTIFY to CMSI . 117
8.4.10 SDP Interworking . 118
8.4.10.1 Offer/Answer Requirements for Call Hold . 120
8.4.10.2 ptime and mptime SDP Interworking . 121
8.4.11 MGC Caller ID Procedures . 122
8.4.11.1 MGC Processing - Egress . 122
8.4.11.2 MGC Processing - Ingress . 123
8.4.12 Procedures for Request History Information . 124
8.4.12.1 Preventing Forwarding Loops and Limiting the Number of Forwarding Attempts . 125
8.4.12.2 Setting of the Call Forwarding parameters . 125
8.4.12.2.1 First Forwarded INVITE . 125
8.4.12.2.2 Second or Subsequent Forwarded INVITE . 126
8.4.12.3 MGC Inter-working . 127
8.4.12.3.1 MGC Processing - Egress . 127
8.4.12.3.2 MGC Processing - Ingress . 129
8.4.13 Operator Services . 130
8.4.14 Signaling Dialled Non-Geographic Numbers . 131
9 Application Layer Anonymizer . 132
9.1 Signaling Content Privacy . 133
9.2 IP Address Privacy . 133
Annex A (normative): TIMER SUMMARY . 136
Annex B (normative): CMSS Message and Header Overview . 137
Annex C (normative): ENUM Client Requirements . 141
C.1 Introduction . 141
C.1.1 General . 141
C.1.2 DNS Resolver Req uire me nts . 141
C.1.3 Database Selector . 141
C.2 NAPTR . 141
C.2.1 Service Field . 141
C.2.2 Case Insensitivity . 142
C.2.3 Regular Expression Delimiters . 142
C.2.4 Non-Terminal NAPTR Records . 142
C.2.5 Handling Multiple URIs . 142
C.2.6 EDNS0 Support . 143
Annex D (informative): Bibliography . 144
History . 145

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