electronic Case Report Form (eCRF) Worksheets and Instructions
Policy Based Routing in an NG911 Environment€¦ · - Emergency Services Routing Proxy essentially...
Transcript of Policy Based Routing in an NG911 Environment€¦ · - Emergency Services Routing Proxy essentially...
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Policy Based Routing in an NG911 Environment CALNENA Annual Conference
La Jolla, CA
March 3, 2020
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9-1-1 call routing today
NG 9-1-1 call routing
Policy Based Routing
Discussion and Questions
March 2020
Briefing Overview
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March 2020
9-1-1 Call Routing Today
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End-
Office
Switch9-1-1 Call
PSAP B
PSAP A
Selective
Router
Alternate
Answer
Switch
Selective
RouterPSAP C
End-
Office
Switch9-1-1 Call
Tandem-Tandem Trunk
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NG 9-1-1 Connectivity
Every
PSAP in
statePSAPMPLS
CAPSNET
LTE
SD-WAN ESInet for PNSP
PSAPMPLS
LTE
PNSP Data Centers
RNSP Data Centers
SD-WAN ESInet for RNSP
Every
PSAP in
Region
9-1
-1 Tra
ffic
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March 2020
9-1-1 traffic routing with NG 9-1-1 Definitions
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Wire
less 9
-1-1
Traffic
ESRP
ECRF
LDB
Ne
xt G
en
Co
re S
erv
ice
s
LNG
ESRP - Emergency Services Routing Proxy essentially replaces the
selective routers in NG 9-1-1.
ECRF - Emergency Call Routing Function is the functional
element where caller location and routing information for that
call is stored (think GIS)
LDB – Location Data Base server retains all of the current
information, functionality, and interfaces of today’s ALI and can utilize the new protocols required in an NG 9-1-1 deployment
LNG – Legacy Network Gateway – performs specific
interworking functions to support ingress of non-i3 calls into the i3
network
PRF – The Policy Routing Function is where default, alternate,
contingent, and emergency routes are located. The PRF is the
specific functionality regarding 9-1-1 traffic routes
PRF
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March 2020
9-1-1 Traffic Routing with NG 9-1-1 (Wireline and non-Nomadic VoIP)
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LNG
ESRP9-1-1 Traffic
LDB
Civic
Address
1. Get Civic Address
from the LDB
Wireline or
Non-Nomadic
VoIP Carrier
Update Process
ECRF
Policy
Routing
Function
At this point, the packet has the
information needed to route the call to the correct PSAP
Policy Routing Function
• PSAP has ability to determine the policy – Such as:
• What happens to wireline call with Hwy address?
• What happens when there is no civic address?
• “Call type” can determine call routing
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March 2020
9-1-1 traffic routing with NG 9-1-1(Wireless and Nomadic VoIP)
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9-1-1 Traffic
Device
Based
Location
LDB
Shell
Record
2. Check for Phase 2 /
Phase 1 location
Wireless or
Nomadic
VoIP
Carrier
Android and Apple
E2 Interface
Wireless Phase 1 / Phase 2
ECRF
Policy
Routing
Function
From the
caller’s
device
At this point, the packet has the
information needed to route the call to the correct PSAP
LNG
ESRP
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March 2020
Policy Based Routing
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• Sets policy rules for normal call
delivery and alternate routing
• Sets policy rules for incident based
call delivery
• Provides ability to define routing
based on operational need
• Requires input from the PSAP
Key: Policy is based on capabilities
that align with operational need
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March 2020
Policy Based Routing: 4 Position PSAP
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• Today, number of CAMA trunks, selective router, and the CPE determine what happens
with the call
• With Next Gen 9-1-1, Policy Routing Function and CPE determine what happens with call
• Policy based routing
• CPE has the ability to return the state of the CPE position to the NG 9-1-1 system
• When all 4 positions are busy – return busy, or route call to another PSAP, or place call in queue, or …
• When line rings with no answer – time out, or route call to another PSAP, or ….
• PSAP has the ability to change routing policy
• Prime maintains policy for entire state and shares policy with region
• Alternate answer PSAP and transfers can be to any PSAP (or multiple PSAPs) in the state
• Not limited by region boundaries
• Policy based routing can be upon request, or dynamic
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March 2020
Policy Based Routing: Alternate Answer
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• Today: alternate answer is limited to a single PSAP connected to your
selective router
• With NG 9-1-1, your alternate PSAP can be any PSAP in the state
• Larger PSAPs can select multiple alternate answer locations
• Alternate answer locations can vary based on operational need
• Time of day
• Number of dispatchers
• Multiple PSAPs based on operational need
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March 2020
Policy Based Routing: Incident Based
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• Can define incident based policy routing
• Planned events
• Disasters
• Local incidents
• Incident based routing can be pre-planned
• For unplanned events, incident based routing can be in near real time,
likely within hours
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Questions and Discussion
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ESRP - Emergency Services Routing Proxy essentially replaces the selective routers in NG 9-1-1
ECRF - Emergency Call Routing Function is the functional element where caller location and routing information for that call is stored
PRF – The Policy Routing Function is where default, alternate, contingent, and emergency routes are located. The PRF is the specific functionality regarding 9-1-1 traffic routes
ALI DB service - The Automatic Location Information DataBase is being used to route calls in a legacy system
LDB – Location Data Base server retains all of the current information, functionality, and interfaces of today’s ALI and can utilize the new protocols required in an NG 9-1-1 deployment
LIS – Location Information Server will transition the ALI database transition into the ESInet / NG 9-1-1 core
LVF - The ECRF connects to the LIS to determine location and validates it through a Location Validation Function (LVF)
LSRG – Legacy Selective Router Gateway
LNG – Legacy Network Gateway - performs specific interworking functions to support ingress of non-i3 calls into the i3 network
LPG – Legacy PSAP Gateway
Next Gen 9-1-1 Components
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