ALFA College of Engineering and Technology

ALLAGADDA

Merited

presentation

A CALL BETWEEN LIFE AND DEATH

INTRODUCTION

E-CALL MEANS

WHY E-CALL

PRINCIPLE

E-CALL SYSTEM FUNCTIONS

SYSTEM GENERIC ARCHITECTURE

E-CALL SIGNALLING PROCEDURE

HARDWARE USED IN E-CALL

TECHNOLOGY OVERVIEW

ADVANTAGES

DISADVANTAGES

FUTURE

CONCLUSION

• Road accidents are one of the

world’s largest public health and

injury prevention problems.

• Four factors contribute to the vast

majority of collisions. They are:

Equipment Failure

Roadway Design

Poor Roadway Maintenance

Driver Behavior

E-CALL MEANS???

• An emergency call.

• It actually reduces the accident response time

during lethal accidents.

• It calls the emergency services either manually or

automatically within minutes of accident.

WHY E-CALL??

• Only 30% of death occurs with minutes of

accident.

• And remaining 70% of deaths occurs within 2

hours , due to late of emergency services.

• So our primary concern is to reduce this

accident response time.

PRINCIPLE

• When an accident occurs the in-vehicle sensors

immediately triggers a e-call.

• when activated in-vehicle system(IVS) establishes

112-voice connection to PSAP operator.

• same time emergency message is sent in form of

MSD (minimum set of data) it includes time, locality,

driving direction ,vehicle description.

E-CALL SYSTEM FUNCTIONS

•Automatically recognizes the accident (using vehicle sensors)

•Localizes the vehicle current position (using GPS)

•Informs emergency services (using GSM network)

System generic architecture

IVS – In-Vehicle system

PLMN – Public Land Mobile Network

PSTN/GSTN – Public/Generalized

Switched Telephone Network

PSAP – Public-Safety Answering Point

E-CALL signaling procedureIVS

In event of accident,IVS automatically sets

Up a 112 voice call using E-call flags

IVS starts transmitting MSD after detecting trigger from PSAP.

IVS continues to transmit MSD

After reception of acknowledgement IVS stops MSD transmission

Uplink voice channel is un-muted.

PSAP

PSAP OPERATOR

• receives emergency call.

• identifies e-call (via flags)

• triggers MSD transmission.

PSAP modem continuously triggers MSD until

it detects the incoming MSD signal

PASP modem detects MSD signal and

continuously tries to decode MSD.

up to correct reception ,PSAP modem sends

acknowledgement and then stops

transmission

• PSAP operator can confirm validity of MSD

using higher layer acknowledgement.

Down link voice channel is un-muted.

HARDWARE USED IN E CALL

in-vehicle sensors

• Air bag sensors

• Tri-axial accelerometer sensors

GPS receiver

CMOS camera

Flash memory

Power supply

Cellular phone

Onboard communications

On-board microprocessor

In vehicle sensors :To report the crash to IVS.

GPS reciever: To get the locality of accident.

Cmos cemara:To capture pictures in dim light also .

Flash memory :to record 30 ms of pre crash data and 50 ms of

post crash data.

Power supply:To provide power supply to the system if car battery

damages.

Cellular phone: To provide emergency voice call and MSD.

On board communication :To provide communication link between

IVS and PSAN.

Technology Over view

Advantages :

It is estimated that E-call system can save lives

up to 2,500 per year.

Reduces severity of the injuries in worst

accidents.

GPS system in vehicle also enables location of

the vehicle when it was stolen.

This System also ensures a corresponding

reduction in the number of traffic jams.

Disadvantages:

costly technology.

complex for maintenance.

Future:

Installation of E-call technology in all new vehicles in

Europe from 2015.

Conclusion:

Highly efficient.

Saves life.

The government must take the responsibility of

implementing this technology.

Drivers can be assured of a healthy drive and a

pleasant ride .

TIME SAVED=LIVES SAVED

QUERIES

Thank You