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VEHICLE TELEMATICS SYSTEM USING GPRS
Phalake M. B. and Bhalerao D. M. Sinhgad College of Engineering / Mech-Mechatronics, Pune 41
Sinhgad College of Engineering / Electronics, Pune 41
Abstract Vehicle Telematics is a term used to define electric data
exchange between connected vehicles. Next generation
Telematics services demanding remote access to vehicle
operational data. A challenge with vehicles utilizing
complicated embedded systems is how to extract the
vehicle diagnostic data, evaluate it to expose possible
problems and determine how to fix any problems.
This paper describes a vehicle data acquisition system by
use of Embedded system places in vehicle and GPRS
connectivity. Large number of data can be transmitted
from the vehicle after collecting it from the ECU’s fitted
in the vehicle. This system is reliable and cost effective
also.
Keywords — Vehicle Telematics, Embedded Syatem,
GPRS
1 Introduction
Now a day’s vehicles are equipped with more
and more electronic gadgets. These Electronics
devices plays vital role in controlling engine
parameters (i.e. proper functioning of engine as
well as emissions parameters), safety, comfort,
navigation, entertainment and much more. Most
of these devices are connected to each other for
gathering information. Further these Electronic
modules provide a diagnostic network interface
through a In-Vehicle network protocols (such as
KWP2000, LIN and CAN) to read number of
parameters related to the engine and vehicle
body electrical and also monitor the Diagnostic
Trouble Codes (DTC’s). The DTC’s provide
valuable information on the faults and also the
sub system where the faults have occurred.
There is need of access of the data available in
vehicle for Vehicle parameters monitoring at the
time of vehicle testing (when vehicle is in
design stage), to monitor the vehicle to
diagnostic and resolve any problem detected
when vehicle is away from home place and from
security point of view also.
Earlier the testing vehicle (running on highway)
equipped with data loggers and other test
equipments were able to give collected data
only when that will come back to
office. And hence there were chance of data
loss. Hence repeated testing was required in
some cases.
To solve all these problems we have designed a
system by help of an embedded system along
with GPRS modem and vehicle electrical and
electronics systems to give cost effective
solution to collect correct and large number of
data.
Hence test engineer can access the Vehicle Data
by using GPRS Embedded Web server fitted in
the vehicle. Using this technique the vehicle test
engineers / owners are able to access vehicle
operational and diagnostic data remotely as well
as control certain parameters / systems from any
place in the world, because this data is available
on internet.
2. Overview and Related Work
Basically Telemetics [1] has meant the blending
of telecommunications and informatics. Vehicle
Telematics deals with exchange of data from
vehicle collected from vehicle networks and
used for vehicle tracking, vehicle monitoring,
and toll collection and for number of things.
Phalake M. B, Bhalerao D. M, Int. J. Comp. Tech. Appl., Vol 2 (1), 132-135 ISSN : 2229-6093
132
There are no of systems available for remote
diagnostics of data like a remote on-line
diagnostic system for vehicles via the use of In
vehicle networking, On-Board Diagnostic
(OBD), and GPS [1] [2] [3] [4].
While there are some systems which use GSM
for monitoring the vehicle data by using the
SMS service for sending data from vehicle [5].
Here in 1st case (OBD and GPS) the data
transmission will be costlier as well as it may be
redundant. In second case (by using SMS) also
chance of loosing necessary of data because of
longer data transmission rate and small size of
messages, and the data transmission will be
costlier if we require continuous monitoring of
vehicle.
3. System Architecture
The use of GPRS [6] is well known to every
body and almost all service providers on GSM
are giving this service. Hence it is very much
easy to be getting connected to the Internet
world. And the OBD system are available in
almost all new generation vehicle as the
electronics devices are getting increased in
today’s vehicle.
Hence if we will get use of these two then it
may be possible to get the necessary data with
less cost and in proper format for vehicle
monitoring.
Hence the System architecture as shown in the
Figure 1 is basically showing the basic systems
from vehicle i.e. EMS (Engine Monitoring
System), Body Electrical System, and ABS-SRS
(Anti-locking breaking system and
Supplemental Restraint System). These systems
are connected in either of communication lines
available in the vehicle for In-vehicle
networking (i.e. K-line, LIN or CAN).
Figure 1: System Architecture
Also the Microcontroller board is nothing but an
embedded system capable to collect data from
said ECU’s and to communicate it further to
GPRS modem [7] for further data transmission.
3.1 Vehicle Connectivity
The system is currently suitable for K-Line
(KWP 2000) connection currently. The
embedded system equipped with
microcontroller will work on vehicle battery ant
it will be properly mounted in vehicle with
necessary network connections. The
connections will be through the Kline
connector. As soon as system gets powered, it
monitors the vehicle network and starts fetching
the latest values of the pre-configured
parameters and the DTC’s from the vehicle
network.
Here the communication will be established first
by enabling the respective device. Then the
fixed command will be used for data exchange
between this embedded device and any or all of
the ECU’s from vehicle.
3.2 GPRS Connectivity
The GPRS connectivity is achieved by using
GPRS modem based on Siemens MC55 Module
is used. The MC55 wireless modules are the
Internet
User / Test
Engineer
EMS
Body
Elect
ABS-
SRS
Microcon
troller
Board
GPRS
Modem
with
TCPIP
Stack
Embedded System
K line / LIN / CAN
communication
RS 232
Veh
icle
Sy
stem
s
Phalake M. B, Bhalerao D. M, Int. J. Comp. Tech. Appl., Vol 2 (1), 132-135 ISSN : 2229-6093
133
smallest double tri-band modules on the market
today. This module covers all of the
GSM/GPRS networks that exist across the
world - and subsequently enable you to
exchange any data in specific format. GPRS
enabled mobile SIM card to be placed in the
adapter provided in Modem. The embedded
client implements AT Commands [7] to
communicate to the mobile devices. The fixed
IP address is configured in the modem and after
establishing communication with the internet
continuous data will be transferred to that
particular IP address by this modem.
3.3 Software:
The software in the embedded system is suitable
for:
1. Communication with vehicle network
2. Communicate with the Modem
Date
Time
EMS System DTCs
Body Ele System DTCs
ABS Sensor DTCs
UCL Tmp (o C)
Fuel Level (L)
Immobiliser status
Break Oil
1/11/10
8:12:35
125 556 NA 35
65
OFF HI
1/11/10
8:20:00
125 556 NA 70
64
OFF HI
Table 1: Data collected on server machine
For Communication with the vehicle networks
the k line (KWP 2000) protocol is used. The
software for physical, data link and application
layer is written in the embedded system. Here
first the necessary devices are enabled for
communication and then the data exchange
starts. The data will be collected after fixed
interval of 500msec from the devices.
While collecting this data the embedded system
is busy with connecting to the GPRS by using
AT commands. Here the network will be
established with the fixed IP address configured
in the modem.
When the proper connection is established, the
data collected from the ECU’s is transmitted in
packets with fixed interval of time.
This data further collected or received at the
said IP address location where one dynamic
page of internet is running. This data collected
on excel file and will be used for further
analysis by the test engineer as shown in table1.
4. Future Work
This work can be explored to LIN and CAN
networks in future. Also we can explore the
system for two way communication to correct
the fault codes detected from the vehicle by
increasing capabilities of microcontroller to
store large number of data. The commands can
be provided from internet to the Embedded Web
Server that can be built at the vehicle using
inbuilt TCPIP stack of the Modem /
microcontroller.
5. Conclusion
This system is designed for vehicle diagnostics
from remote location and vehicle performance
monitoring point of view. But this system can
be used for wide variety of applications like:
Phalake M. B, Bhalerao D. M, Int. J. Comp. Tech. Appl., Vol 2 (1), 132-135 ISSN : 2229-6093
134
Vehicle Security
Emergence services
Fleet management
Advertisement in the vehicle using LED
display
Remote fault finding / Troubleshooting
Currently this system supports GPRS and can be
extended to 3G technologies for faster and more
detailed data transfer. It can be extended to any
other Vehicle protocols. This concept can be
realized into small portable hardware that can
be mounted to any automotive vehicle to enable
remote access. This can extended to have a GPS
(Global Positioning System) so that all vehicle
parameters including vehicle location can be
monitored remotely. This system can be
extended to provide service support remotely.
6. References
[1] K. Y. Cho, C. H. Bae, Y. Chu And M. W.
Suh, “Overview Of Telematics: A System
Architecture Approach”, International
Journal of Automotive Technology, Vol. 7,
No. 4, pp. 509−517 (2006)
[2] William Jenkins, Ron Lewis, Georgios
Lazarou, Joseph Picone and Zachary
Rowland, “Real-Time Vehicle Performance
Monitoring Using Wireless Networking”,
Human and Systems Engineering, Center for
Advanced Vehicular Systems, Mississippi
State University, 200 Research Blvd.,
Mississippi State, Mississippi 39759, USA
[3] I. Aris1, M.F. Zakaria2, S.M. Abdullah1 and
R.M Sidek1, “Development Of Obd-II
Driver Information System”, International
Journal of Engineering and Technology,
Vol. 4, No. 2, 2007, pp. 253-259
[4] Jyong Lin, Shih-Chang Chen, Yu-Tsen
Shih, and Shi-Huang Chen, “A Study on
Remote On-Line Diagnostic System for
Vehicles by Integrating the Technology of
OBD, GPS, and 3G”, World Academy of
Science, Engineering and Technology 56
2009
[5] Vinayak S. Kumbar, Sneha Bharadwaj,
Nagalaxmi B.V, Abhijeet Prem Jetly,
“Cellular Based Remote Vehicle Data
Access”
[6] Christian Bettstetter, Hans-Jörg Vögel, And
Jörg Eberspächer, “Gsm Phase 2+ General
Packet Radio Service Gprs: Architecture,
Protocols, And Air Interface”, IEEE
Communications Surveys, Third Quarter
1999, vol. 2 no. 3
[7] Siemens Cellular Engine, “MC55 AT
Command Set”, Version: 02.06 Date:
November 12, 2004 DocId:
MC55_ATC_V02.06
Phalake M. B, Bhalerao D. M, Int. J. Comp. Tech. Appl., Vol 2 (1), 132-135 ISSN : 2229-6093
135