Learning the ropes – GPS / GPRS vehicle tracking systems
A. GPS: Global Positioning System – (Source: Wikipedia) The Global Positioning System (GPS) is a space-based satellite navigation system, the place and time offer at any time, anywhere on or near the Earth wherein the line of sight of the view that at least four GPS satellites. It is maintained by the Government of the United States and is freely available to anyone with a GPS receiver.
Second GPS receiver: This is also known as GPS, is a gadget that allows you to pinpoint your exact location, its task 4 or more satellites are located. With the mathematical principle – Trilateration – can find its own position anywhere on earth.
Third GPRS – General Packet Radio Service: This is a packet oriented mobile data on 2G and 3G cellular communication system Global System for Mobile Communications (GSM). You know, the check as Internet data connection on your phone, and use it to surf the Internet, email, downloading software / songs on your mobile device.
Devices supporting GPRS are divided into three classes:
3.1 GPRS Class A Device: Can be connected to GPRS service and GSM service (voice, SMS), both at the same time.
3.2 GPRS Class B device: Can be connected to GPRS service and GSM service (voice, SMS), but only one or the other at any given time. During GSM service (voice call or SMS), GPRS service is suspended and then resumed automatically after the GSM service ended (call or SMS). Most GPRS mobile devices are Class B.
3.3 Class C GPRS device: either GPRS or GSM service (voice, SMS) are connected. Must manually between either service are connected.
How to establish a GPRS device
A GPRS connection is established by reference to its access point name (APN). The APN defines the services such as Wireless Application Protocol (WAP) access, Short Message Service (SMS), multimedia messaging service (MMS) and Internet communication services such as email and the World Wide Web to access.
To set up a GPRS connection for a wireless modem, a user must specify an APN, if necessary. A user name and password, and very rarely an IP address, all provided by the network provider
GPS + GPRS = unit used in your vehicle to monitor in real time
A GPS receiver and GPRS hardware side sitting side by side in the same box (usually denoted as follows: GPS tracking unit), powered by the same battery. Periodically or predefined events, the device sends GPS data using GPRS to a central server (called: GPS location server)
The basics are clear, in a word – a unit that has both GPS and GPRS modules and material interfaces the GPS tracking device. Once the apparatus is installed in the vehicle, the self-reported locations of units showing the location of the vehicle. All data must be sent to the monitoring server is then presented to the user on the map / reports.