Does A-GPS?

A-GPS (Assisted GPS), is a technology that uses an auxiliary server servers Assistance) to reduce the time needed to determine a position using a GPS device.

Very useful in urban areas, which the user is located in a valley, lush with large trees, or even inside buildings. Starting over is known that usually associated with Location Based Services (LBS) on mobile networks.

Even if in the land of Uncle Sam, the development of this service is supported by a provision whereby a mobile telephone device should be used as a tool in a state of emergency.

A-GPS differs from the GPS receiver device generally, with the addition of other elements in the equation, namely a Server Help. In a previous GPS network system there are only GPS satellites with a GPS receiver devices.

Another in the network A-GPS system, a receiving device, which is limited by the ability to force the process and be in sufficient condition for pushing hard to get a permanent position (position fixing), can even help you communicate with a server that has a strong and has the ability to process access to its position in the network.

Therefore an A-GPS devices and servers can help divide the tasks, especially in a matter of time that the process becomes more rapid and efficient compared with only a GPS device in general, but that is becoming highly dependent on the existence of service provider network coverage of course.

Assisted GPS can be described as a system that depends on external sources, such as an auxiliary server (Mobile Location Server) through its network, to assist a GPS receiver perform the necessary tasks in terms of both measurement and calculation of the location.

Auxiliary server that has the ability to access information from the reference network and also has computing power far beyond an ordinary GPS receiver device of course. In these systems, the server communicates with the help of GPS receiving device in a cellular telephone device through a cellular network.

With the help of a cellular network, the receiving device can operate more quickly and efficiently, because some of the tasks normally performed by the server itself can be divided aid course. And the result of A-GPS systems can improve their performance far exceeds the GPS receiver when a similar device operates without the help of (stand-alone mode).

In general, a standard GPS receiver devices require highway to the sky conditions and needs at least four satellites before it can calculate the fruit of his position adequately. Moreover require devices that have the ability to process powerful enough to transform the data streams from satellites TSB into a position.

In mode A-GPS, mobile receiving device is enough to take a glimpse of the satellite and transmitting signals to a cellular tower is forwarded to a server that help make the necessary calculations to compute a position fix. The server then sends back the results of the calculation to the position of the mobile receiving device.

Although in some other mobile receiving device that can receive data streams that have been revamped TSB and calculate their own position. Although originally one of the main objectives of the A-GPS is to provide a wider range of location-based emergency phone service, much like an American owned. Besides providing services to the cellular telephone user, location-based services to aid navigation (turn-by-turn navigation aid).