| 摘要 |
The charging principles regarding mobile calls can be improved by providing the mobile station with a locator object, which at certain intervals determines the cell in which the mobile station is currently located. Stored in the mobile station is also a list of areas permitting application of a special rate. The locator object monitors calls made from the mobile station. When it detects that a call is being started, it checks whether the mobile station was in a special rate area at the time when its location was determined last. If this is the case, then the object will inform the network that the call is entitled to a special rate. As the last location function was executed just before the call setup was started, a special rate call is possible even if the mobile station has moved some distance into the area of a cell applying a normal rate. Placed in a billing centre is a billing object, to which the locator object sends data indicating whether the call was started from a cell or area where a special rate is applicable, as well as data identifying the call. The second object receives the billing records generated by the mobile switching centre, which also contain call identifying data, and compares the call-specific data in them with the data sent by the first object. In this way, the second object can find from the billing records the calls that are entitled to a special rate, regardless of whether the mobile station has moved during call setup from the original cell into a cell where another rate, e.g. a higher rate is applicable.
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