The document discusses e-call systems, which automatically connect to emergency services in the event of a vehicle accident. E-call systems use in-vehicle sensors to detect accidents and GPS to locate the vehicle. They then make an emergency 112 voice call and transmit a minimum set of data about the time, location, and vehicle. This allows emergency responders to arrive faster, which can save thousands of lives each year by reducing the time between an accident and medical assistance. The technology is complex but becoming mandatory in new European vehicles by 2015 due to its life-saving benefits.

1. ALFA College of Engineering and Technology
ALLAGADDA
Merited
presentation

2. A CALL BETWEEN LIFE AND DEATH

3. 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

4. • 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

5. 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.

6. 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.

7. 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.

8. E-CALL SYSTEM FUNCTIONS
•Automatically recognizes the accident (using vehicle sensors)
•Localizes the vehicle current position (using GPS)
•Informs emergency services (using GSM network)

9. System generic architecture
IVS – In-Vehicle system
PLMN – Public Land Mobile Network
PSTN/GSTN – Public/Generalized
Switched Telephone Network
PSAP – Public-Safety Answering Point

10. E-CALL signaling procedure
IVS
 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.

11. 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

12. 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.

13. Technology Over view

14. 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.

15. Future:
Installation of E-call technology in all new vehicles in
Europe from 2015.

16. 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

17. QUERIES

18. Thank You