What is GPS,AGPS,LBS in android?

Question

I'm working in android (developing application for mobile and tablets). I am using android version is 2.2.

In my application, I want to capture the longtitude,latitude. My suprevisor is said to me capture the locations using GPS,AGPS,LBS

I'm new to android .I does not know GPS,AGPS,LBS.

Please send me the details, what are the difference,advantages,disadvantages of these 3?

Answer 1

Don't compare LBS with GPS and AGPS. LBS stands for Location based services . It's a service done with the help of GPS/AGPS . For example 'Requesting the nearest business or service, such as an ATM or restaurant' is a service required by a user. There are many applications available for to provide above service. Those application will use either GPS/AGPS to find the location and service to user based on the location fetched.

So simply any application which use location to serve users are considered as LBS.

Following is the difference between GPS and AGPS

The difference between GPS and A-GPS is actually pretty straightforward. A GPS phone comes with a built-in GPS chip. GPS, short for Global Positioning System, is typically used to determine the location, speed, direction and time of the device. So, for example, in the case of the Mobile, when GPS is activated on the unit, the system would be able to triangulate the position of the receiver when three or more satellites are connected. And since it is able to calculate speed and direction, GPS is also commonly used as a navigation device while driving.

A-GPS (Assisted-GPS), on the other hand, was developed to enhance the performance of GPS. This is especially useful in environments where the GPS chip may have difficulty in getting a satellite signal, such as an urban canyon, or places where there is too much overhead obstruction. What A-GPS does is it leverages on an intermediary called an Assistant Server which provides information on cell ID or other data to help the device identify the right satellites to connect to. This shortens the time needed for a location lock although certain A-GPS solutions require an active connection to a cell phone network.

Pros and Cons of GPS and AGPS:

The realiability and Accuracy is high in the GPS and it is low in AGPS.

The location captured by AGPS is not as accurate as GPS.

The location capturing via GPS is time consuming and power (Battery) consuming, etc.

Hope it helps. For more details on A-GPS