A vision for relay services and interoperability
This presentation is the property of its rightful owner.
Sponsored Links
1 / 26

A Vision for Relay Services and Interoperability PowerPoint PPT Presentation


  • 43 Views
  • Uploaded on
  • Presentation posted in: General

A Vision for Relay Services and Interoperability. Christian Vogler, PhD Director, Technology Access Program Gallaudet University. P urpose of this talk. What this talk is about

Download Presentation

A Vision for Relay Services and Interoperability

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


A vision for relay services and interoperability

A Vision for Relay Services and Interoperability

Christian Vogler, PhD

Director, Technology Access Program

Gallaudet University


P urpose of this talk

Purpose of this talk

  • What this talk is about

    • A vision for extending the principle of functional equivalence to global telecommunications and new forms of telecommunications

    • Technologies and standards issues

  • What this talk is not about

    • Policies needed to make this vision happen

    • Legal frameworks

    • Funding


Functional equivalence

Functional Equivalence

  • An attempt at a definition:

    Can deaf* people use telecommunication services in the same unrestricted manner and at the same costs as hearing people?

    * “deaf” is meant to include deaf-blind, hard of hearing, and people with speech disabilities, as well here


Call scenarios

Call Scenarios

  • What do hearing people take for granted in telecommunications?


Call scenario same country

Call Scenario: Same Country

Alice (h)

Bob (h)


Call scenario international

Call Scenario: International

Carl (h)

Alice (h)


Call scenario roaming travel

Call Scenario: Roaming/Travel

Carl (h)

Alice (h)


Call scenarios1

Call Scenarios

  • Let’s see what deaf people can do

    • Need to consider both relay and point-to-point

    • Why: principle of familiarity – should be able to use common equipment for everyday and emergency communications

  • Remember: this is about technology

    • Some countries have additional policy restrictions


Deaf call scenario same country

Deaf Call Scenario: Same Country

Dan (d)

Alice (h)

TRS

*

TRS = Telecommunications Relay System – here: all forms of relay

*Assumes integration of deaf user’s equipment into telephone numbering system, a.k.a Ten-Digit-Numbering. (currently only US, and partially UK)


Deaf call scenario same country1

Deaf Call Scenario: Same Country

Dan (d)

Emily (d)

Point-to-point: Works mostly, but not uniformly (and some countries better than others)


Deaf call scenario international i

Deaf Call Scenario: International (I)

Carl (h)

*

Dan (d)

TRS

Call is routed through relay in Dan’s country, in Dan’s language

*Assumes integration of deaf user’s equipment into telephone numbering system


Deaf call scenario international ii

Deaf Call Scenario: International (II)

Carl (h)

*

Dan (d)

TRS

Call is routed through relay in Carl’s country, in Carl’s language

*Does not work with integration into telephone numbering system


Deaf call scenario international iii

Deaf Call Scenario: International (III)

Frank (d)

Emily (d)

Point-to-point: Does not work with same equipment as used for relay calls


Call scenario roaming travel1

Call Scenario: Roaming/Travel

Carl (h)

Emily (d)

TRS

Call is routed through relay in Emily’s country, in Emily’s language

Works only if Emily can use her own equipment (and connection is not impeded or impaired). Does not work if Emily borrows equipment in Carl’s country.


What is missing

What is Missing?

  • Voice calls (hearing side) are interoperable

    • Global standards for landline, mobile, and interconnected VoIP

  • Relay calls (deaf side) are not interoperable

    • Codecs and protocols (H.263, H.264, H.323, SIP, proprietary, …)

    • Call setup (i.e. how do I dial the call?)

    • Lack of interoperability with mainstream VoIP equipment (here: also includes video and text over IP)


Codecs and protocols

Codecs and protocols

  • Need standards for codecs and protocols:

    • Video, audio, text, images

    • Must meet functional performance requirements for communication

      • E.g. sign language communication requires minimal frame rate, resolution

      • Recovery from network problems may be different from current practice in mainstream VoIP

    • Must work across environments (e.g. Internet, IMS, and next-generation emergency)

    • Should be compatible with mainstream equipment (“may I borrow your videophone?”)


Call setup

Call Setup

  • Need standards for call setup:

    • Connecting to relay provider and point to point

    • Integration into the mainstream telecommunications network (i.e., 10-digit numbering or equivalent)

      • Related policy question: who assigns – relay or telecommunications carrier?

    • Passing hearing party’s number to relay service (i.e. I can dial and don’t have to fingerspell it)

    • All this must work when roaming


Supplemental services

Supplemental Services

  • Standards for interacting with supplemental services:

    • Voicemail, Videomail (i.e., can deaf caller leave a message, can hearing caller leave a message, point-to-point messages?)

    • Call alerting (i.e. how are deaf people notified of an incoming call?)

    • Others?


Looking ahead teleconferencing

Looking Ahead: Teleconferencing

This is what currently works:

TRS A

Audio bridge

Alice (h)

Dan (d)

TRS B

Bob (h)

Emily (d)

TRS C

Frank (d)

Carl (h)


Looking ahead teleconferencing1

Looking Ahead: Teleconferencing

  • Not functionally equivalent

    • Hearing parties can hear one another

    • Deaf parties cannot see one another

    • Double translation – from Dan to TRS A, and from TRS B/C to Emily/Frank

      • Degrades accuracy and quality

      • Introduces additional unacceptable lag

  • Wasteful

    • Availability of relay operators already cannot meet demand

    • Separate interpreters need to be paid, even if they use the same language and communication modality


Looking ahead teleconferencing2

Looking Ahead: Teleconferencing

This is what we need:

Dan (d)

Multimedia bridge

Alice (h)

Emily (d)

Bob (h)

Frank (d)

Carl (h)

TRS


Looking ahead teleconferencing3

Looking ahead: Teleconferencing

  • Relay services need to track emerging standards for interoperable teleconferencing systems

  • Note: In the US, interoperable teleconferencing systems are required by law and recent FCC rules to be accessible under the “Advanced Communication Services” provision of the 21st Century Communications and Video Accessibility Act


Areas that need attention

Areas that Need Attention

  • Next-generation emergency services

    • E.g. REACH 112, NG-9-1-1

  • The switch to mobile telephony

    • On LTE calls will be IP-based

    • Unclear yet how relay services will interact with the IP Multimedia Subsystem (IMS)


A vision for relay services and interoperability

NENA motto:

“Any device, anytime, anywhere”

Let’s make this happen for relay services, too!


Acknowledgments

Acknowledgments

The contents of this presentation were developed with funding from the National Institute on Disability and Rehabilitation Research, U.S. Department of Education, grant number H133E090001 (RERC on Telecommunications Access). However, those contents do not necessarily represent the policy of the Department of Education, and you should not assume endorsement by the Federal Government.


Questions

Questions?

Email: [email protected]: http://tap.gallaudet.edu/

Related work

Vogler et al. Video Relay Service Practices and Policies around the World. To appear in AEGIS workshop, Nov 28-30, 2011.

Functional performance characteristics

  • ITU-T H-series Recommendations – Supplement 1, 05/99

  • FCC filing in CG Docket 10-51. Online: http://fjallfoss.fcc.gov/ecfs/comment/view?id=6016375091


  • Login