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Location aware services infrastructure

  • US 6,873,258 B2
  • Filed: 04/10/2002
  • Issued: 03/29/2005
  • Est. Priority Date: 04/10/2001
  • Status: Expired due to Term
First Claim
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1. A system for automatically advising a subscriber application of changes with respect to the identity of at least one or more entities or a location in which an entity is located, each entity having a unique tag identifier, said system comprisinga plurality of beacon transmitters, each transmitting an identifier of the region of the beacon transmitter, said entity tags monitoring for beacon identifiers broadcast by the beacon transmitters, a base station for receiving from an entity both its identity and the identity of the broadcast beacon identifier, an entity identity register which specifies the locations of entities, and a location identity register which specifies the entities within a particular location, each of said registers containing criteria predetermined by a subscriber application as to the change of conditions with respect to an entity or a location which is to be brought to the attention of the subscriber application, said registers notifying the subscriber application when changes of an entity or location meet said criteria.

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