Embedded Systems & Wireless Technology
The Sattvah On-Board equipment uses three kinds of wireless technology that complement features of the Sattvah Service in order to bring our customers mobile assets management based on their needs.
Bluetooth
Bluetooth is a radio-based wireless communication technology, by the dint of which the cable connections of the modern hi-tech devices have been completely cut off – thereby maintaining a high degree of efficiency with utmost security.
Integration with Bluetooth™ communication technology allows the use of:
- Bluetooth™ hands-free headsets
- Third-party PDAs
- Wireless bar-code readers
- Electronic signature capture devices
ZigBee
ZigBee is a specification for a suite of high level communication protocols and has been designed to provide features as low power consumption, simple protocol and global implementation.
In Sattvah Service ZigBee technology is used for Vehicle to Infrastructure (V2I) communication needed for Smart Bus Stop and Traffic Light Priority solutions for Public Transit Management.
In case of Smart Bus Stop solution the bus communicates with the bus stop in order to ensure more accurate arrival information which contributes to improved Passenger Service Information.
The bus equipped with ZigBee communicates with the traffic light's controller to assure bus traffic priority which reduces traveling time, delays, bus idling and improves passenger satisfaction.
WiFi
With WiFi module installed inside each bus and access points located in depots, all data stored in Sattvah On-board unit is, upon bus arrival to the depot, transferred over WiFi gateway to Sattvah server. Download process is fast and reliable and also allows data download from several vehicles at a time.
What is GPS and how does it work?
Developed by the U.S. Department of Defence for the military, the Global Positioning System (GPS) is a worldwide, satellite-based, radio navigation system that will give you the exact position of your vehicles, no matter where they are, what time it is, or what the weather is like. There are a total of 24 satellites orbiting the Earth. Each satellite transmits a unique code, its exact location and a very precise time code. On earth, the GPS receivers take this satellite data from multiple satellites and - using an algorithm & the time stamps - calculate the individual distances of each satellite from the GPS receiver. With some clever calculations, these can then point the precise location on Earth where the signal is received. The precise location is then transmitted by any of the available methods such as mobile phones (GSM/GPRS, WCDMA), Wireless (RF, WiFi, WiMax) and even a Satellite uplink for remote locations.
How does Fleet Tracking work?
Fleet Tracking uses satellite based Global Positioning System (GPS) to pinpoint the vehicle location. It is a real-time tracking system designed to receive, store, transmit and poll vehicle location status using an available wireless backbone and digitized maps. The vehicles are mounted with Tracking Units that collect geo-coordinate information from the satellites and use it for calculating the position, speed and direction of the vehicle. The base Monitoring Station is equipped with the main server that collects all the relevant information from the various Vehicle Tracking Units and displays the vehicle position on digitized geo-referenced maps with the help of a specially customized application software.
What is GSM, GPRS & GIS?
GSM (Global System of Mobile) is a popular mobile communication system provided by most of the cellular service providers in most countries internationally.
GPRS (General Packet Radio Service) is a new communication service introduced by the GSM operators which allows secure and confirmed transfer of content like digital photos and other data to other GPRS capable systems.
GIS (Geographical Information System) is a software which consists of specially developed comprehensive and detailed maps of the city/country with latitude & longitude information of each place, street, junction and address.