Text to 911 requirements options
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1. Text-to-911: Requirements & Options. Henning Schulzrinne FCC. 2. Goals. What have we learned so far? possibilities & options What are requirements? What are the trade-offs? Long-term goals Short-term achievable Not an official FCC policy statement

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Text-to-911: Requirements & Options

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Text to 911 requirements options

1

Text-to-911: Requirements & Options

  • Henning Schulzrinne

  • FCC


Goals

2

Goals

  • What have we learned so far?

    • possibilities & options

  • What are requirements?

  • What are the trade-offs?

    • Long-term goals

    • Short-term achievable

  • Not an official FCC policy statement

    • reflects comments, ex-partes, EAAC, …


The big picture

3

The big picture

cellular

voice

SMS

Internet

(WiFi, 3G/4G)

RTT, SMS, IM

location PSAP + capability


General hard requirements

4

General hard requirements

  • Work everywhere

    • even without 3G/4G coverage

    • end-to-end compatible (standards-based)

  • All mobile devices

    • smart phones & feature phones

    • with and without a data plan

  • Basic automated location capability

    • sufficient for identifying PSAP

  • Path to NG911

    • transition should be invisible to users


Desirable likely feasible

5

Desirable & likely feasible

  • Short code 911 for SMS

  • Support for IP-based (“app”) solutions in addition to SMS

    • can support RTT and IM-mode when PSAP is capable of receiving such

  • System automatically chooses best option for user

    • based on PSAP capabilities

  • NG911 as soon as possible


Hard constraints

6

Hard constraints

  • Can’t upgrade all PSAPs 

    • no money

    • no FCC authority over PSAPs

    • have to support fall back modes (see next)


Acronyms and concepts

7

Acronyms and concepts

  • IMS (Internet Multimedia Subsystem)

    • 4G approach to carrying multimedia calls

    • SIP-based (like NENA i3)

  • MMES (Multimedia Emergency Services)

    • IMS extension

    • details TBD

  • ESInet (Emergency Services IP network)

    • the (private) IP network that connects PSAPs in a region

    • contains call handling and call routing equipment


Acronyms and concepts1

Acronyms and concepts

  • OTT (over-the-top)

    • communication services that use Internet (IP) services for voice or video

    • rather than “native” services directly supported by cellular provider

      • currently, voice & SMS/MMS

    • examples: Google Voice, Skype, Vonage, Netflix, iMessage, AOL IM, …


Psap text handling options direct

9

PSAP text handling options: direct


Psap text handling options assisted

10

PSAP text handling options: assisted


Psap classes

11

PSAP classes


Who can use the system

Who can use the system?

  • Options presented:

    • everybody

    • “soft” registration

      • “are you sure” message for non-registered users

      • e.g., TRS/VRS users get access to 911 app for smartphones

    • “hard” registration

      • error message for non-registered users

  • Affects

    • system cost (if telematics or relay operator)

    • funding possibilities

    • broader goals (text as fallback, Vtech scenarios)

    • per-call cost


Key questions

Key questions

  • What transition mechanisms are

    • preferable

    • acceptable for a transition period?

  • How long should the transition period be?

    • Any suggestions on mechanisms to encourage & accelerate the transition to better mechanisms?

  • Identify trade-offs and solutions, not just requirements


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