NEW Emergency Services Testing · Agenda Emergency Calling Services Fixed-Line vs Mobile-Originated Call Routing What is a Public Services Answering Point (PSAP) What is the role

Chester Calma – Technical Sales Manager, Americas

NEW Emergency Call Services TestingInnovative test methods for mission critical services such as: VoLTE 911 / 112 and EU eCall

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SIGOS Conference for Telco & Digital Experience 2018

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Incorrect Emergency Services Routing – Deadly Consequences

▪ Each time a wireless 911 call is “misrouted” and transferred, the call transfer process consumes time and resources in both the PSAP that initially receives the call and the PSAP to which the call is transferred, and the process ultimately delays dispatch and the ability of first responders to render aid.

▪ We have reason to believe that 911 misroutes are not occasionalor isolated and in fact occur frequently, on occasion with deadly consequences. The importance of addressingthis issue is escalating as the public is increasingly dependent on wireless networks and devices for access to 911.

▪ In the state of Washington, USA it was found that in 2014, there were approximately 94,600 transferred 911 calls between PSAPs, each adding an average of 40 seconds to the call time, for a total of 1,051 hours of call delays

Source: https://www.fcc.gov/document/fcc-examine-ways-improve-911-call-routing-0

Agenda

▪ Emergency Calling Services

▪ Fixed-Line vs Mobile-Originated Call Routing

▪ What is a Public Services Answering Point (PSAP)

▪ What is the role of the Emergency CSCF (E-CSCF)

▪ Challenges in testing Emergency services

▪ eCall – Interoperable EU-wide rapid assistance for motorists

▪ VoLTE 911/112 SOS testing using SIGOS S1-CORE probe

▪ Benefits of using SIGOS’s tool for ad-hoc and proactive Emergency test calls

▪ Use case scenarios for eCall and VoLTE 911/112


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Emergency Services Calling

What is an Emergency Call?

▪ 911 or 112 dialed digits for police, fire or ambulance rapid response

▪ Dedicated bearer to the emergency channel

▪ Calls must be allowed even if there is no SIM or active subscription

▪ Calls must be routed to PSAPs that match the location area of the caller

▪ In the US, over 70% of 911 calls are mobile originated*

What must the telco service provider send to the PSAP?

▪ Phase 0 – Call Back Number and fixed line address

▪ Phase 1 - Phase 0 + serving tower GPS coordinates

▪ Phase 2 - Phase 1 + device location coordinates through A-GNSS or signal TDOA

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Fixed-Line vs Mobile-Originated Call Routing

▪ What do the terms ANI and ALI mean?

▪ ANI – Automatic Number Identification (similar to Caller ID)

▪ ALI – Automatic Location Identification database holds street addresses of the ANI

▪ The emergency services operator uses this address to dispatch the first responders

▪ Fixed line emergency calls are routed by the LEC (local exchange) to a static PSAP

▪ Mobile originated emergency calls are analyzed based on Cell-ID and then routed to the correct PSAP in the service area

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Public Safety Answering Point (PSAP)

▪ Responsible in answering emergency calls from fixed and mobile callers

▪ Responsible in dispatching police, fire or ambulance response

▪ Responsible for contacting the emergency caller in case the call drops mid-call

▪ In the US and Canada, test calls to PSAPs cannot be robocalls and must be pre-scheduled

▪ ANI and ALI information is used by thePSAP to properly locate the emergency caller

Image:http://waapconena.org

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The role of the Emergency-CSCF

▪ The E-CSCF is responsible for providing the correct PSAP number based on the location of the emergency caller

▪ It maintains a database mapping of different TAC/Cell-IDs assigned to PSAPs

▪ TAC/Cell-ID → ESRD (Emergency Services Routing Digit)

▪ The telco operator is responsible for the data fill and accuracy of the database

E-CSCF

Times Square, NY

JFK Airport, NY

Newark Airport, NJ

Midtown NYC PSAP

Long Island PSAP

New Jersey PSAP

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Scenario Mapping Exercise

Image: https://www.tripsavvy.com

Incorrect ESRD value in the E-CSCF

Northern California PSAP

Wine Country PSAP

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Challenges in testing Emergency Services

▪ Traditional testing requires a live person to be physically under the cell tower coverage

▪ Testing of all sectors of the cell tower requires special software to scan for the cell-IDs

▪ Travel and manpower costs increase when test sites are spread over large distances

▪ Telecom operators outsource the testing and classify the cost as OPEX

▪ Upgrades and changes in the network trigger re-testing of multiple sites and thus creating a backlog

▪ PSAP agencies have a defined time windowfor test calls during a 24 hour period

Image: https://msdnshared.blob.core.windows.net

https://msdnshared.blob.core.windows.net/

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eCall

▪ eCall is an European Commission initiative aimed at reducing the response time for emergency services in case of car accidents by 50/60%

▪ eCall capable vehicles will automatically send data to the nearest emergency center (PSAP)

▪ The service is starting to be rolled out across the EU – by 2018 it will become mandatory for all new cars

PSAPMNO

eCall Capable Vehicle

2G/3GVoiceMSD

Planned Availability: SITE 3.5.2.

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eCall Testing with SITE

▪ Mobile operators need to ensure routing and successful transmission of data (MSD) for eCalls across Europe as the eCall module is in sleep mode until actual incident – national and roaming

▪ SITE offers eCall testing via dedicated eCall-capable wireless module

▪ The module can be used to simulate an In-Vehicle System (IVS) and test:▪ eCall routing in the mobile network (towards a test number)

▪ Transmission of the Minimum Set of Data (MSD) in PUSH or PULL mode

▪ Establishment of the voice channel

Planned Availability: SITE 3.5.2

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VoLTE 911 / e112 Emergency Service Testing

▪ E911 platform testing – applicable to North American Market

▪ E112 platform testing – applicable to European Market

▪ Main use case: Emergency services platform testing, using S1 probes with localization and voice forwarding capabilities based on Phase 2 FCC requirements

Planned Availability: SITE 3.5.2.

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Emergency Calls using SIGOS-S1

▪ Emergency (SOS) calls in VoLTE can be generated using the SIGOS-S1 probe▪ Location information of the emergency caller is defined at the beginning of the test routine▪ SIGOS S1-traffic can test both SIM-based and SIM-less scenarios

▪ Two-way voice is established between the PSAP operator and test engineer▪ The SIGOS-S1 probe connects to the telco’s MME and can handle multiple emergency call

sessions▪ Audio recording of the conversation with the PSAP operator ensures compliance to local

regulatory certification requirements

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S1-CORE VoLTE 911 Test Flow

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Benefits of using SITE for Emergency services testing

▪ Reduce the turn-up time of macro or micro cells for Emergency capability certification

▪ Minimize the cost impact of field service drive tests

▪ Increase efficiency of a technical engineer by performing Emergency test calls without leaving his office

▪ Increase compliance with the regulator bodies on delivery of eCalls to the correct PSAP

▪ Increase accuracy of the E-CSCF and LRF functions when routing the emergency calls

▪ Maintain an audit trail of audio recordings with the PSAP

PSAPMNO

eCall Capable Vehicle

2G/3GVoiceMSD

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Example: eCall Use Scenario

▪ eCall equipped SITE probes can be deployed in different geographic test points in country

▪ Selective placement of eCall probes will allow ad-hoc testing into different PSAPs

▪ Pro-active monitoring of the eCall service ensures compliance with the regulator requirements

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VoLTE 911 Use Case

A Canadian wireless operator has a requirement to perform E911 calling via VoLTE via an automated tool that can simulate different TAC and CID without a technician present at the location. The current method of initiating VoLTE 911 calls via handsets require technicians to be present at the local switch coverage to trigger PSAP lookup based on TAC/CID.

The requirements are:

1. Initiate an Emergency Attach via LTE

2. Initiate VoLTE messaging for 911 or SOS calls

3. Initiate VoLTE 911 or SOS calls varying (TAC/CID)

4. Ability for a TELUS technician to speak and hear audio of the answering PSAP in real-time

5. Ability to record the audio from the answering PSAP

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Regional S1-CORE Emergency Testing Architecture

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Thank you

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Documents

NEW Emergency Services Testing · Agenda Emergency Calling Services Fixed-Line vs Mobile-Originated Call Routing What is a Public Services Answering Point (PSAP) What is the role