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SIP and Other IETF Standards Update Jonathan Rosenberg Chief Scientist.

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Presentation on theme: "SIP and Other IETF Standards Update Jonathan Rosenberg Chief Scientist."— Presentation transcript:

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2 SIP and Other IETF Standards Update Jonathan Rosenberg Chief Scientist

3 Carrier IP World Forum Protocols and Standards for the Next-generation IP Network C O N N E C T I N G T H E W O R L D W I T H A P P L I C A T I O N S Overview Recent SIP Activity Call Processing Language (CPL) Telephony Routing over IP (TRIP) ENUM

4 Carrier IP World Forum Protocols and Standards for the Next-generation IP Network C O N N E C T I N G T H E W O R L D W I T H A P P L I C A T I O N S SIP Working Group in IETF Formed in September 1999 Chairs Jonathan Rosenberg (dynamicsoft) Dean Willis (Worldcom) Joerg Ott (University of Bremen) Split from MMUSIC group, which developed SIP Goals Bring SIP to draft standard Develop in-progress SIP extensions Consider new proposed SIP extensions

5 Carrier IP World Forum Protocols and Standards for the Next-generation IP Network C O N N E C T I N G T H E W O R L D W I T H A P P L I C A T I O N S Interim SIP Meeting Interim Meeting Held November, 1999 All day meeting to consider Packetcable SIP Extensions (Distributed Call Signaling, DCS aka DOSA) Agreed to most of Packetcable requirements Agreed to split into several independent extensions Agreed to take Packetcable work as proposed solution Agreed to ensure that final solution Works for cable and other applications Works for all interactive session types Works for inter-provider Maintains SIP generality

6 Carrier IP World Forum Protocols and Standards for the Next-generation IP Network C O N N E C T I N G T H E W O R L D W I T H A P P L I C A T I O N S First SIP Meeting Met at IETF in November 1999, D.C. Two full sessions Nineteen (19) drafts submitted and considered SIP INFO Method, SIP-T, ISUP to SIP interworking (Ericsson, Level (3), IPVerse, Worldcom) Q.SIG Transport in SIP (Nortel) INAP Support of SIP/SDP (Alcatel) Mobility in SIP (Telcordia) DTMF Transport (Worldcom) SIP Servlet API (HP)

7 Carrier IP World Forum Protocols and Standards for the Next-generation IP Network C O N N E C T I N G T H E W O R L D W I T H A P P L I C A T I O N S SIP-T Originally Developed by ISC Inter-softswitch communications ISUP transparency Accepted as a SIP Working Group Item INFO Method extension Mid-call ISUP messages ISUP to SIP message conversions MIME payload type for ISUP Umbrella specification MGC SCTP Megaco T1 SS7 SIP-T Proxy SCTP Megaco T1 SS7 SG MGC MG SG MG

8 Carrier IP World Forum Protocols and Standards for the Next-generation IP Network C O N N E C T I N G T H E W O R L D W I T H A P P L I C A T I O N S SIP Caller Preferences SIP Extensions for Specifying Caller Preferences Preferences Carried In INVITE Setup Message Preferences For Reaching callee at home or work Fax, video, audio call Mobile or landline Secretary or voic Priority locations Preference Video

9 Carrier IP World Forum Protocols and Standards for the Next-generation IP Network C O N N E C T I N G T H E W O R L D W I T H A P P L I C A T I O N S SIP and QoS Problem Resource reservation and call signaling are separate Call setup needed to obtain IP addresses for reservation Call setup can succeed, while Reservation Fails Solution DCS Proposes two phase INVITE Proposed compromise solution uses single phase INVITE, with extra provisional response INV 183 Progress PRACK CallerCallee 200 OK ACK Resource Reservation Ringing Pickup Media

10 Carrier IP World Forum Protocols and Standards for the Next-generation IP Network C O N N E C T I N G T H E W O R L D W I T H A P P L I C A T I O N S SIP Call Control Complete June 2000 Specifies Primitives to Support Blind transfer Transfer with consult Fully distributed multi-party conferencing Ad-hoc conference bridges Operator assisted transfer B BYE Also: C Crypto-Token: A,B INVITE Requested-By: A Crypto-Token: A,B 1 2 C B A

11 Carrier IP World Forum Protocols and Standards for the Next-generation IP Network C O N N E C T I N G T H E W O R L D W I T H A P P L I C A T I O N S Call Processing Language (CPL) Output of IPTEL Group, Due Feb 2000 A Scripting Language to Describe Call Services Language Properties Guarantee Safety Based on XML Hand or Tool Authoring Example: Call Forward on Busy/No-answer

12 Carrier IP World Forum Protocols and Standards for the Next-generation IP Network C O N N E C T I N G T H E W O R L D W I T H A P P L I C A T I O N S Telephony Routing over IP (TRIP ) Inter-domain Protocol for Gateway Route Exchange Complete Feb 2000 TRIP Supports Numerous Models Bilateral agreements Centralized settlements provider Wholesaler service TRIP Is Based on Scalable IP Routing Technology Uses BGP4 as a basis Supports aggregation Uses proven algorithms End Users Gateways Location Server ISP A TRIP Front End ISP B

13 Carrier IP World Forum Protocols and Standards for the Next-generation IP Network C O N N E C T I N G T H E W O R L D W I T H A P P L I C A T I O N S Telephone Number Mapping (enum) New Working Group in IETF Supports DNS based mapping of phone numbers to URLs Used when phone number represents an IP host Applications Location of SIP servers Discovery of addresses for pager numbers SIP URLs for voic servers DNS

14 Carrier IP World Forum Protocols and Standards for the Next-generation IP Network C O N N E C T I N G T H E W O R L D W I T H A P P L I C A T I O N S Summary SIP Activities in IETF Have Accelerated New working group 19 drafts at last meeting Contributions on Q.SIG, ISUP, TCAP, QoS, mobility, DTMF from big players IPTEL Working Group Nearing Completion Telephony Routing over IP (TRIP) Call Processing Language (CPL) ENUM Working Group Just Begun

15 Carrier IP World Forum Protocols and Standards for the Next-generation IP Network C O N N E C T I N G T H E W O R L D W I T H A P P L I C A T I O N S On the Horizon Presence and Instant Messaging (IM) IMPP Working Group Developing standards based on Presence and IM Will leverage SMTP and HTTP, and will look much like SIP H.323 and SIP Interworking ITU, IETF, ETSI Tiphon and IMTC are interested Joint effort is possible MMUSIC Next Steps SDP successor Conference control Conference control bus

16 Carrier IP World Forum Protocols and Standards for the Next-generation IP Network C O N N E C T I N G T H E W O R L D W I T H A P P L I C A T I O N S Information Resource Jonathan Rosenberg


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