Connectivity for advanced voip and integrated communications
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National Internet2 Day March 18 th , 2004 Ben Teitelbaum, Internet2 <[email protected]> For this and other talks... http://www.internet2.edu/~ben/talks.html. Connectivity for Advanced VoIP and Integrated Communications. Personal Communications. Highest value applications are generic

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Connectivity for Advanced VoIP and Integrated Communications

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Connectivity for advanced voip and integrated communications

National Internet2 DayMarch 18th, 2004

Ben Teitelbaum, Internet2<[email protected]>

For this and other talks...

http://www.internet2.edu/~ben/talks.html

Connectivity for Advanced VoIP and Integrated Communications


Personal communications

Personal Communications

Highest value applications are generic

Email, telephone, postal mail

Throughout the history of communications, generic person-to-person communications have dominated content distribution and domain-specific apps

Voice

The dominant real-time communications medium

A "killer" network application for >100 years

VoIP opens doors to make voice communications even more valuable


Voice data convergence

Long promised, but still inevitable

Has happened in the core

Happening now for residential / enterprise

Drivers

Cost, cost, cost, cost, cost

Why have a giant switch, two networks, two staffs, etc.?

Voice is just another network application

Dampers

QoS, 911, CALEA, USF, FUD

Little user "pull"

Voice / Data Convergence


Advanced voice

Replace or Displace?

If voice is so important, why be satisfied with replacing plain-old telephone service (POTS)?!

Users are already defecting to cellular, SMS, AIM, MSN Messenger, Yahoo!, etc.

VoIP can be much better than POTS

Potential dimensions of improvement

Fidelity

Privacy

Addressing

Mobility

Media translation

Advanced Voice

  • Survivability

  • Integration with IM, video, etc.

  • Presence

  • "911++"


Advanced voice1

Replace or Displace?

If voice is so important, why be satisfied with replacing plain-old telephone service (POTS)?

Users are already defecting to cellular, SMS, AIM, MSN Messenger, Yahoo!, etc.

VoIP can be much better than POTS

Potential dimensions of improvement

Fidelity

Privacy

Addressing

Mobility`

Media translation

Advanced Voice

  • Survivability

  • Integration with IM, video, etc.

  • Presence

  • "911++"

Not covered here, but Internet2 projects in these areas exist

Covered in this talk


Connectivity

Connectivity

"Paths in the snow"

Don't predict how users will want to communicate

Users are highly-motivated to communicate with each other and to innovate

Connect them and watch what happens

Witness: P2P file-sharing

Network connectivity + middleware = P2P FS

Similar potential for real-time apps

We should get ahead of the curve this time and provide the enabling middleware ourselves


Connective middleware

Connective Middleware

Application connectivity:

Are there protocols and call routing infrastructure to establish connections between communicating applications?

Application Connectivity

Addressing

Addressing

(SIP/SIMPLE call and presence routing)

RichPresenceServices

RichPresenceServices

Network Connectivity

(high-performance, end-to-end IP transit)

Network connectivity:

Can connections be established between communicating IP addresses with high-performance and high-availability?

User connectivity:

Can I reach you?

User

User


Internet2 s secret sauce

Demographics

~3.8 million students (tech-savvy, talk a lot, adapt easily)

And, by the way, they graduate (tech-transfer à la email)

Institutional Commitments

Internet2 members have committed to advance IP communications and promote collaborative apps

Many are looking for ways to reverse eroding voice revenues

Connectivity

Great networking connectivity

High-bandwidth, low-loss, low-jitter

End-to-end transparency (few NATs)

IPv6 and multicast too!

Emerging middleware infrastructure for AuthN/Z

Need to build on this to connect users with each other!

Internet2's Secret Sauce


Connectivity for advanced voip and integrated communications

SIP.edu

What’s “SIP”?


Sip session initiation protocol rfc 3261

SIP

Signalling protocol for creating, modifying, and terminating real-time internet media sessions

SIP (and its extensions) support traditional telephony features as well as instant messaging and presence

Attributes

Provides: user registration, call routing, setup, tear down, and redirection

Makes heavy use of existing standards

Easy and familiar feel (email-style headers, HTTP-style error codes, URL addresses)

Signaling and media paths separate

SIP: Session Initiation Protocol (RFC 3261)


Sip trapezoid

SIP Trapezoid

INVITE sip:[email protected]

Proxy

Proxy

Registrar

Registrar

Alice's hardphone

Bob's softphone

Media (and subsequent signaling)


Sip happens

Vigorous standards activity

SIP (core protocol and extensions) • SIPPING (applications) • SIMPLE (instant messaging and presence) • not just IETF, 3GPP too!

Enthusiastic industry adoption

Phones (Microsoft, Cisco, Pingtel, Snom, ...)

Servers (Cisco, Microsoft, Broadsoft, ...)

Conferencing (eDial, RADVision, ...)

Services (Level3, WorldCom, Vonage, ...)

Open source software

Servers: SER (iptel.org) • VOCAL (vovida.org)

Soft Phones: Linphone • KPhone

SIP Happens


Sip edu

Fearless Leader

Dennis Baron <[email protected]>

Goals

Grow number of SIP connected users

Increase value proposition for end-user SIP adoption

Promote convergence of voice and email identity

Low entry-cost means for campuses to...

Provide a useful service

Start getting their feet wet with SIP

Means

“SIP.edu cookbook” available on web site

Partnering with vendors (Cisco working with 6 schools)

SIP.edu


Remember it s people we are connecting

Addressing

Users should not be burdened with device addresses, when it’s people they really care about

Addresses should be mnemonic and empower enterprises to manage the identities of their users

sip:[email protected]

It’s time to put E.164 phonenumbers behind us!

A.G. Bell did not say...

Remember: It's People We Are Connecting

“+1-617-637-8562, come here. I need you!”


Sip edu architecture today

SIP.edu Architecture (today)

SIPProxy

SIP-PBXGateway

PBX

DNS

CampusDirectory

SIP User Agent

INVITE(sip:[email protected])

DNS SRV query sip.udp.bigu.edu

bigu.edu

PRI / CAS

INVITE(sip:[email protected])

sip. udp.bigu.edu IN SRV ...

telephoneNumberwhere mail=”bob”

Bob's Phone


Sip edu architecture real soon

SIP.edu Architecture (real soon)

If Bob has registered, ring his SIP UAs; Else, call his extension through the PBX.

SIPProxy

DNS

SIPRegistrar

locationDB

SIP User Agent

INVITE (sip:[email protected])

DNS SRV query sip.udp.bigu.edu

bigu.edu

INVITE (sip:[email protected])

REGISTER(Contact: 207.75.164.131)

Bob's SIP Phones


Sip edu growth

SIP.edu Growth

>8 other schools working on it


Presence and integrated communications

Presence and Integrated Communications

Presence

“Notification of events that facilitate communication” (Henning Schulzrinne)

“On-line”, “Away”, “Idle”, “On phone”, “Out to lunch”, ...

Back to the future?

Remember: finger, write, who?

Presence restores the sense of community that existed on timesharing systems

Forward to the future!

New standards for interoperability and scalability

User-centric control of presence publication

Richer state semantics and automatic triggers


Rich presence trials

Rich Presence Trials

Indianapolis October, 2003

Honolulu January, 2004

Arlington April, 2004


Client mockup

Client Mockup

WaveThree Software and Columbia U. have provided clients (Session, SIPC)

Others welcome! (client requirements doc on web)


Voip working group

Chairs

Walt Magnussen <[email protected]>

Mike Enyeart <[email protected]>

Web site

http://voip.internet2.edu/

Projects

SIP.edu

Voice Disaster Recovery

H.323 VoIP Testbed

VoIP Working Group


Presence and integrated communications working group

Chair

Jermey George <[email protected]>

Web site

http://pic.internet2.edu/

Projects

Rich Presence Trials

Social Context Study Group

Presence and Integrated Communications Working Group


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