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By Johan Hjelm

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Sample text

Charging and billing are a chapter in themselves and the subject of much contention in the mobile industry (where it is often assumed that certain billing models, like billing for the time a user is connected to a service, are a natural law). But as you saw in Chapter 1, location-based billing is one emerging model that is different from the traditional billing paradigms. Cell ID-Based Positioning In all of the mobile systems in operation today, when the user presses the “on” button or enters a cell, the mobile phone connects to the network through the base station and there is a signal to a central database stating that a mobile telephone (a mobile station is the correct terminology) has entered a cell.

So you not only have to build a user interface that is intuitive and simple, but you also have to set your prices in such a way that you do not scare them away. ” Before you develop a location-dependent service, however, you need to understand how the data should be encoded and how you can get the position information. This is what Chapters 3, 4, and 5 are about. ” And with that, let us look at some of the prerequisites for positioning: coordinates and positioning services. CHAPTER 2 15 Positioning Technologies hen you can measure time precisely, you can measure your position if you have a point of reference.

The user information is kept in a distributed database in the core network (the Home Location Register, or HLR). It keeps track of where the user is and interfaces with the billing system to make sure that the user gets charged for the services he or she is using. Charging and billing are a chapter in themselves and the subject of much contention in the mobile industry (where it is often assumed that certain billing models, like billing for the time a user is connected to a service, are a natural law).

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