The Next Generation 9-1-1
Proof-of-Concept System
About the project
“EMERGENCY HELP. Anytime, anywhere, any device.”™
National Emergency Number Association (NENA)
IETF ECRIT Working Group
IETF GEOPRIV Working Group
NENA
High level requirements
Use of multimedia
Data delivery and sharing
Recording and incident details
Call taker user interface
Technical standards
Technical standards
IETF ECRIT Working Group
System architecture
IETF GEOPRIV Working Group
Behavior of components
Format of location objects
The NG9-1-1 POC System
The POC system is deployed in 5 real PSAPs and 3 labs across the USA.
PSAP: Public Safety Answering Point (=Emergency call center)
King County, WA
Bozeman, MT
St. Paul, MN
Rochester, NY
Columbia
Univ. Lab
Fort Wayne, IN
BAH Lab
TAMU Lab
POC system is divided into two networks
Emergency Services Network (ESN)
PSAP A
9-1-1
Location-to-Service
Translation (LoST)
Server
PSAP SIP
Proxy
.
.
.
Emergency Services
Routing Proxy (ESRP)
Call Distributor
Call Takers
SIP-based network
of PSAPs
SIP Back-to-back
User Agent
managed by the emergency authorities
.
Network
used by emergency
caller
to
ask
for .help
Public
Safety
Answering
Points (PSAP)
Emergency
Services
Network
(ESN)
.
PSAP Z
Examples: PSTN, Cellular, Residential VoIP
Access Network
Role
1. Determine location of caller
2. Route call to ESN
Conference Server
PSAP SIP
Proxy
.
.
.
Call Distributor
SIP Back-to-back
User Agent
Call Takers
①
③
Why is location important?
• Send help to the site of emergency
• Route call to the correct destination
②
How do I send my location?
•Sent along with SIP INVITE
•Formatted as PIDF-LO XML object
GPS
LLDP-MED
DHCP
Cell Tower
Manual Entry
Skyhook Wireless
Emergency Services Network (ESN)
VoIP
PSAP A
LoST
9
-1-1
9-199-1-1
Location-to-Service
Translation (LoST)
Server
Emergency Services
Routing Proxy (ESRP)
SIP
PSAP SIP
Proxy
.
.
.
Call Distributor
SIP Back-to-back
User Agent
Call Takers
.
. Points (PSAP)
Public Safety Answering
.
PSAP Z
PSAP SIP
Proxy
.
.
.
Call Distributor
SIP Back-to-back
User Agent
Call Takers
RTP
Conference Server
Access Network
Emergency Services Network (ESN)
VoIP
PSAP A
LoST
9-1-1
Location-to-Service
Translation (LoST)
Server
Emergency Services
Routing Proxy (ESRP)
SIP
PSAP SIP
Proxy
.
.
.
Call Distributor
SIP Back-to-back
User Agent
Call Takers
.
. Points (PSAP)
Public Safety Answering
.
PSAP Z
PSAP SIP
Proxy
.
.
.
Call Distributor
SIP Back-to-back
User Agent
Call Takers
RTP
“All call takers are busy…”
Conference Server
Access Network
Emergency Services Network (ESN)
Cellular
PSAP A
LoST
9
-1-1
9-199-1-1
Location-to-Service
Translation (LoST)
Server
Emergency Services
Routing Proxy (ESRP)
SIP
PSAP SIP
Proxy
.
.
.
Call Distributor
SIP Back-to-back
User Agent
Call Takers
.
. Points (PSAP)
Public Safety Answering
.
PSAP Z
PSAP SIP
Proxy
.
.
.
Call Distributor
SIP Back-to-back
User Agent
Call Takers
RTP
Conference Server
Access Network
Emergency Services Network (ESN)
SMS
PSAP A
LoST
9
-1-1
9-199-1-1
Location-to-Service
Translation (LoST)
Server
PSAP SIP
Proxy
.
.
.
Call Distributor
SIP Back-to-back
User Agent
Call Takers
“Bank robbery!”
Emergency Services
Routing Proxy (ESRP)
SIP
.
. Points (PSAP)
Public Safety Answering
.
PSAP Z
S
Conference Server
Access Network
PSAP SIP
Proxy
.
.
.
Call Distributor
SIP Back-to-back
User Agent
Call Takers
Emergency Services Network (ESN)
Telematics
PSAP A
LoST
9
-1-1
9-199-1-1
Location-to-Service
Translation (LoST)
Server
Emergency Services
Routing Proxy (ESRP)
SIP
PSAP SIP
Proxy
.
.
.
Call Distributor
SIP Back-to-back
User Agent
Call Takers
.
. Points (PSAP)
Public Safety Answering
.
PSAP Z
PSAP SIP
Proxy
.
.
.
Call Distributor
SIP Back-to-back
User Agent
Call Takers
RTP
Conference Server
Access Network
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