Method and apparatus for detecting the home area in a mobile station
First Claim
1. A method for detecting a home area in a mobile station comprising the steps of:
- storing predetermined home area data in the mobile station;
receiving data by the mobile station from base stations of a cellular network;
comparing said data received by said mobile station to said predetermined home area data to determine if said mobile station is within said home area; and
wherein said home area data is determined based on at least part of received data comprising signal strengths of available broadcasting channels, distances to base stations on the broadcasting channels, and time advances.
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Accused Products
Abstract
The invention relates to a method for detecting a home area in a mobile station, and to a mobile station realizing the invention. According to the invention the home area is detected in the mobile station by comparing (8) data received by the mobile station from the base stations of a cellular network with predetermined (1 to 6) home area data stored in the mobile station. The home area data is determined (1 to 6) based on preferably all of the following data: a) a mobile country code (MCC), b) a mobile network code (MNC), c) a location area code (LAC) and a related cell identity (CI) for all broadcasting channels (BCCH) which the base station is able to receive, d) received signal strengths (RSS) for all broadcasting channels BCCH, e) distances from all base stations (BTS) on the broadcasting channels BCCH, and f) timing advances (TA).
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Citations
10 Claims
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1. A method for detecting a home area in a mobile station comprising the steps of:
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storing predetermined home area data in the mobile station;
receiving data by the mobile station from base stations of a cellular network;
comparing said data received by said mobile station to said predetermined home area data to determine if said mobile station is within said home area; and
wherein said home area data is determined based on at least part of received data comprising signal strengths of available broadcasting channels, distances to base stations on the broadcasting channels, and time advances. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A mobile station equipped to detect home area data comprising:
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a storage medium for storing predetermined home area data;
a radio receiver for receiving home area data from base stations of a cellular network;
a processor for comparing said data received by said mobile station to said predetermined home area data to determine if said mobile station is within said home area; and
wherein said home area data is determined based on at least part of received data comprising signal strengths of available broadcasting channels, distances to base stations on the broadcasting channels, and time advances. - View Dependent Claims (10)
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Specification