Geofence

Cellular geofencing for global tracking is cited in the United States Patent Office over 240 times by major companies such as IBM and Microsoft since 1995 and is first mentioned as:[3] A global tracking system (GTS) for monitoring an alarm condition associated with and locating a movable object, the GTS comprising: Geofencing uses technologies like GPS, or even IP address ranges, to build its virtual fence.

"A-GPS uses assistance data received from the network to obtain a faster location calculation compared with GPS alone.

[5] The Wide Area Augmentation System (WAAS) is used by devices equipped and used in North America—the accuracy is considered to be within 3 m at least 95% of the time.

The reason for the higher battery consumption is the fact that the service requires running in the foreground throughout the time of usage.

Other applications include sending an alert if a vehicle is stolen,[11] and notifying rangers when wildlife stray into farmland.

[13] In 2015, US Senator Charles Schumer proposed a law requiring drone manufacturers to build geofencing constraints into unmanned aerial vehicle navigation systems that would override the commands of the unsophisticated operator, preventing the device from flying into protected airspace.

It allows users of the system to draw zones around places of work, customer's sites and secure areas.

These geofences when crossed by an equipped vehicle or person can trigger a warning to the user or operator via SMS or email.

Geofencing solution providers allow marketers and advertisers to precisely choose the exact location that their ads show up on.

For example, a local auto-dealership builds a virtual boundary within a few square miles from its dealership's location to target car buyers within the same neighborhood.

Broadcasting or advertising more extensively brings irrelevant responses and wastes energy, time, money, and opportunity.