GSM localization
From Free net encyclopedia
GSM localization is the use of multilateration to determine the location of GSM mobile phones, usually with the intent to locate the user.
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Types
There are several types of Localization-Based Systems:
- Cell Identification - The accuracy of this method is 200 meters in urban areas, 2 km in suburban areas and 3-4 km in rural zones. (up on frequency use 900/1800)
- Enhanced Cell Identification - With this method one can get a precision similar to Cell Identification, but for rural areas, with circular sectors of 550 meters.
- TOA - Time of arrival
- AOA - Angle of arrival
- E-OTD - This is similar to TOA, but the position is estimated by the mobile phone, not by the base station. The precision of this method depends on the number of available LMUs in the networks, varying from 50 to 200 m.
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See also
- Multilateration
- Global Positioning System
- Assisted GPS
- Internationalisation : usability, product design, user interface and cultural data collection
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External links
- Uplink Time Difference of Arrival, Assisted GPS, Enhanced Cell Identification, Angle of Arrival
- CellSpotting: A Global Cell Id-Based Information Service
- http://www.incotel.es/
- LBS, the ingredients and the alternatives
- GSM Tutorial
- Location API for J2ME
- J2ME and Location-Based Services
- Instruction and Information on GSM cellphone tracking and locationes:Localización GSM