draft-miniero-mediactrl-escs-01

1
draft-miniero-mediactrl-escs-01

• Alessandro Amirante
• Tobia Castaldi
• Lorenzo Miniero
• Simon Pietro Romano
• (University of Napoli Federico II)

2
Changes from -00 to -01

• All scenarios and flows have been updated to the
  latest specifications
• Reflects changes in the core framework
• Added ctrl-package attribute
• Updated all flows involving Basic IVR
• Added new scenarios
• Voice Mail
• BFCP-moderated conferencing (placeholder)
• New draft reflects updated implementation

3
Voice Mail Scenario
D1. AS lt- MS (SCFW CONTROL event) ----------------
----------------- SCFW 4rfg34fg21ge
CONTROL Control-Package
msc-ivr-basic/1.0 Content-Type text/xml
Content-Length 126 lt?xml
version"1.0"?gt ltevent dialogid"1aa30g5"gt
ltdialogexit status"1"gt
ltcollectinfo dtmf"46679" termmode"match"/gt
ltdialogexit/gt lt/eventgt
C1. AS -gt MS (SCFW CONTROL, VCR) -----------------
--------------- SCFW p0ofgh35vzx1
CONTROL Control-Package msc-ivr-basic
Content-Type text/xml
Content-Length 271 lt?xml
version"1.0"?gt ltdialogstart
conferenceid"1cc1a27"gt ltbasicivrgt
ltprompt maxduration"300s"gt
ltmedia src"http//www.ms.org/recordings/reco
rding-54fcb22.wav"
type"audio/wav"/gt lt/promptgt
ltcollect ffkey"6" rwkey"4" pausekey"7"
resumekey"9"/gt lt/basicivrgt
lt/dialogstartgt
A1. AS -gt MS (SCFW CONTROL, play) ----------------
----------------- SCFW 1gffh68hydx0
CONTROL Control-Package msc-ivr-basic
Content-Type text/xml
Content-Length 271 lt?xml
version"1.0"?gt ltdialogstart
conferenceid"1cc1a27"gt ltbasicivrgt
ltprompt bargeinfalse"
maxduration"15s"gt ltmedia
src"http//www.ms.org/prompts/youhave.wav"
type"audio/wav"/gt
ltvariable value"5" type"digits"/gt
ltmedia src"http//www.ms.org/prompts/mails
.wav" type"audio/wav"/gt
ltmedia src"http//www.ms.org/prom
pts/lastreceived.wav"
type"audio/wav"/gt ltvariable
value"2008-03-07" type"date" format"ymd"/gt
ltvariable value"1109" type"time"
format"t24"/gt lt/promptgt
lt/basicivrgt lt/dialogstartgt

• Simplified scenario
• Some features already described
• Shows use of new Basic IVR features
• VCR Controls
• Do they need to belong to ltcollectgt?
• Ambiguity with other ltpromptgt and ltcollectgt
  attributes
• Variable announcements
• Which is the base url?
• Is the filenames construction implementation
  specific?

4
ltpromptgt, ltcollectgt, ltrecordgt

• Models in place of templates
• More flexible than before
• Is order important? Should it be?
• May be confusing (e.g. VCR)
• Iterations only for ltpromptgt now
• Should the attribute be global?
• New termmode attribute
• A termination mode for hangup may be useful
• Still ambiguous in some parts
• Offset (in ltpromptgt), timeout vs maxtime (in
  ltrecordgt), dest (in ltrecordgt), etc.

5
Basic IVR CONTROL

• Use of MS-generated CONTROL messages for event
  notification
• Works fine, tested in many scenarios
• However, may lead to starvation for the AS
• Is there a need for a keep-alive?
• A timeout is not feasible, dialogs could be long
  lasting by request
• e.g. record a conference for 3 hours

6
ltstreamgt element

• Implementation now partly supports video (for
  ltjoingt between endpoints)
• Attaching media is fine as long as each medium in
  the same session is of a different type
• Even by using ltstreamgt, thats an issue
• e.g. joining two endpoints which negotiated two
  different audio streams with each other
• Same issue applies for ltpromptgt and ltrecordgt in
  Basic IVR

7
Discussion

• Framework is improving
• IVR package is evolving well
• Many scenarios achievable
• Currently, just a few issues
• Implementation work to verify this is currently
  in full swing
• Still some ambiguities in the specification for
  implementors
• Conferencing package still needs work
• Related to our draft
• Please read it and send us comments!
• We do believe it contains a bunch of useful
  information
• Ready to become a WG item?

8
Work in progress in Naples

• Check out our mediactrl site on sourceforge
• http//mediactrl.sourceforge.net/
• A summary of all our efforts related to mediactrl
• Media Server implementation docs
• Application Server implementation docs
• Download it, install it and play with it!
• Looking for other implementations to come
• Interoperability tests _at_ next IETF?