Encyclopedia > Cell of origin (telecommunications)
Cell of Origin (COO) is a mobile positioning technique for finding a caller's cell (the basic geographical coverage unit of a cellular telephone system) location. Cellular redirects here. ...
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Overview
For COO positioning, the location of the base station is ascertained and considered to be the location of the caller. COO is a variable and not a very precise locator; depending on the number of base stations in the search area, accuracy may be as close as within one hundred meters of the target (in an urban area) or as far off as thirty kilometers away from the target where base stations are less densely concentrated. For this reason, when precision is important COO is often used in conjunction with some other technology, such as the Global Positioning System (GPS) or Time of Arrival (TOA). GPS satellite in orbit, image courtesy NASA The Global Positioning System, usually called GPS, is the only fully-functional satellite navigation system. ... The six original Toa. ...
COO is the only positioning technique that is widely used in wireless networks and is used for Phase 1 of 911 service in the United States. COO may be used by emergency services or for commercial use. 9-1-1 (nine-one-one) is the emergency telephone number for the North American Numbering Plan (NANP). ...
GSM localization is the use of multilateration to determine the location of GSM mobile phones, usually with the intent to locate the user.
Cell Identification - The accuracy of this method can be as good as a few hundred meters in urban areas, but as poor as 32 km in suburban areas and rural zones.
Cell Broadcast - This technology lets mobile operators notify users on their current location.
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