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© Semel2006
VIKING WORKSHOPHamburg March 15th – 16th
FCD via GPRS – The Green Box SystemSemel Oy
Börje Nummelin
© Semel2006
GREEN BOX
• A GPRS based solution for;– Collect road charges
– Surway Link speed– Collect and distribute FCD information
– Piloted with 1.100 Taxis
• Advantage of GPRS solution in Green Box
– Low Data consumption (less than 1Mb/month/car)– Packed data
– EMV level encryption– Heavy duty servers based on standard technology
– On line solution
© Semel2006
GREEN BOX
OBU
OBU-Windows CE-embedded platform-Communication SW (Semel)-Application SW, GPS signal to zones (Semel)-Display, Navigator or Mobile Phone
LANGPRS
GW(Semel)
ERP(SeveralPoss.)
GPRSnetwork
GPRS Gateway (Semel)- Communication- Keep alive (GPRS)- Administration- OBU On-line SW updates- OBU New billing parameters- OBU diagnostics- Connection to other services- Admin map – zones
ERP - Admin, billing- E-commerce
Based on on-line GPRS connection
© Semel2006
GREEN BOX VEHICLE
• Five levels– Road charge– Link speed– FCD– Taxi stations– Dispatch areas
– GPS signal calculated every second
GPS
Dispatch zones
Taxi stations
FCD
Link speed
Road charge
0
1
2
3
4
© Semel2006
GREEN BOX BACK OFFICE
OBU
Applicationinterface:
gwIntegration
(XML)
mobile networkor WLAN
ERP
operativeapp B
operativeapp C
alarm
encryption/decryption
compression
GW backbone
GIS
BroadCast
TelephonyLink
(SMS,email,GSM locator)
Resend
binary filetransfer
© Semel2006
V1
V1
Road X
V1
V2
• Road charge zones type ’V2’
• RCD zones type ’Road X’
• Link speed zones type ’V1’
GREEN BOX PRINCIPLE
© Semel2006
GREEN BOX PRINCIPLEEXAMPLE
• Road charge zones (ex 3000)
• FCD zones (ex. 371, 370, etc.)
© Semel2006
• Road charge zones– Different
classes of vehicles simulated
– Different charge zones
K
V
R
GREEN BOX PRINCIPLEEXAMPLE
© Semel2006
• Link speed points
GREEN BOX PRINCIPLEEXAMPLE
© Semel2006
GPRS RELIABILITY AND APPLICATION LEVELS
• GPRS application packed and iPSec encrypted• Different message priority levels
– Payment transaction 100 % by applications– Important broadcasts 3 times sent– Less important only one sending
• GPRS reliability figures– GSM/GPRS network loses app. 2% of messages– Testfigure of 2 weeks (as example);
• Sent 136 000 messages• Two resets, meaning loss of network contact
• Coverage practically 100%
© Semel2006
GPRS NETWORKRELIABILITY AND COVERAGE
• Example of– New Initialisation
into GPRS network
– Coverage during 2 weeks test
© Semel2006
SUMMARY
• GPRS is suitable for online FCD gathering, and distribution, but needs tailored solution
• GPRS coverage is very good
• Data consumption can be handeled by using Green Box type zone solutions
• Project will end in September, and then there will be data from Green Box cars to compare with roadside FCD cameras.