The Next Generation 9-1-1 Proof-of-Concept System

About the project

“EMERGENCY HELP. Anytime, anywhere, any device.”™National Emergency Number Association (NENA)

Technical standardsIETF ECRIT Working GroupIETF GEOPRIV Working Group

The NG9-1-1 POC System

High level requirements

Use of multimediaData delivery and sharing

Recording and incident detailsCall taker user interface

Technical standards

System architectureBehavior of components

Format of location objects

IETF ECRIT Working GroupIETF GEOPRIV Working Group

NENA

The POC system is deployed in 5 real PSAPs and 3 labs across the USA.PSAP: Public Safety Answering Point (=Emergency call center)

Fort Wayne, IN

Rochester, NY

Bozeman, MT

King County, WA

St. Paul, MN

BAH Lab

Columbia Univ. Lab

TAMU Lab

Emergency Services Network (ESN)Network used by emergency caller to ask for help

Examples: PSTN, Cellular, Residential VoIP

Role1. Determine location of caller2. Route call to ESN

9-1-1

Access Network

Emergency Services Network (ESN)

Emergency Services Routing Proxy (ESRP) Call Distributor

SIP Back-to-back User Agent

PSAP A

PSAP SIP Proxy

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Location-to-Service Translation (LoST)

Server

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Call Takers

PSAP Z

PSAP SIP Proxy

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Call TakersCall DistributorSIP Back-to-back

User Agent

Public Safety Answering Points (PSAP)

Conference Server

POC system is divided into two networks

SIP-based network of PSAPs managed by the emergency authorities

Why is location important?• Send help to the site of emergency• Route call to the correct destination

Cell Tower

LLDP-MED

GPS

DHCP

Manual Entry

Skyhook Wireless

How do I send my location?•Sent along with SIP INVITE •Formatted as PIDF-LO XML object

① ③

②

Emergency Services Network (ESN)

Emergency Services Routing Proxy (ESRP) Call Distributor

SIP Back-to-back User Agent

PSAP A

PSAP SIP Proxy

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.

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Location-to-Service Translation (LoST)

Server

.

.

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Call Takers

PSAP Z

PSAP SIP Proxy

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Call TakersCall DistributorSIP Back-to-back

User Agent

Public Safety Answering Points (PSAP)

Conference Server

RTP

LoST

VoIP

Access Network

SIP

9-9-1-19-1-9-1-1

Emergency Services Network (ESN)

Emergency Services Routing Proxy (ESRP) Call Distributor

SIP Back-to-back User Agent

PSAP A

PSAP SIP Proxy

.

.

.

Location-to-Service Translation (LoST)

Server

.

.

.

Call Takers

PSAP Z

PSAP SIP Proxy

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.

.

Call TakersCall DistributorSIP Back-to-back

User Agent

Public Safety Answering Points (PSAP)

Conference Server

RTP

LoST

Access Network

SIP

9-1-1

“All call takers are busy…”

VoIP

Emergency Services Network (ESN)

Emergency Services Routing Proxy (ESRP) Call Distributor

SIP Back-to-back User Agent

PSAP A

PSAP SIP Proxy

.

.

.

Location-to-Service Translation (LoST)

Server

.

.

.

Call Takers

PSAP Z

PSAP SIP Proxy

.

.

.

Call TakersCall DistributorSIP Back-to-back

User Agent

Public Safety Answering Points (PSAP)

Conference Server

RTP

LoST

Cellular

Access Network

SIP

9-9-1-19-1-9-1-1

Emergency Services Network (ESN)

Emergency Services Routing Proxy (ESRP) Call Distributor

SIP Back-to-back User Agent

PSAP A

PSAP SIP Proxy

.

.

.

Location-to-Service Translation (LoST)

Server

.

.

.

Call Takers

PSAP Z

PSAP SIP Proxy

.

.

.

Call TakersCall DistributorSIP Back-to-back

User Agent

Public Safety Answering Points (PSAP)

Conference Server

LoST

SMS

Access Network

SIP

9-9-1-19-1-9-1-1

“Bank robbery!”

S

Emergency Services Network (ESN)

Emergency Services Routing Proxy (ESRP) Call Distributor

SIP Back-to-back User Agent

PSAP A

PSAP SIP Proxy

.

.

.

Location-to-Service Translation (LoST)

Server

.

.

.

Call Takers

PSAP Z

PSAP SIP Proxy

.

.

.

Call TakersCall DistributorSIP Back-to-back

User Agent

Public Safety Answering Points (PSAP)

Conference Server

RTP

LoST

Telematics

Access Network

SIP

9-9-1-19-1-9-1-1

Crash Data

Final Comments

• We are beginning to understand what an emergency response system should look like

• There are lots of interesting network problems in emergency communication systems– Location of network devices– “Call setup time (dialing of last digit to ring at the

PSAP), under expected peak load shall be less than 2 seconds.”

– Reliable communications in large scale disasters