Abstract: A system for determining the vicinity of a communication device within a communication network is provided. Individual communication devices are provided with an active identification reader capable of reporting information concerning identified passive identification tags to a location server. At least some passive identification tags have fixed or known locations, allowing a communication device capable of reading such a passive identification1 tag to be determined to be within a particular vicinity or area. Communication devices may also be provided with passive identification tags to allow other active identification readers to determine whether the communication device is in their vicinity.

Abstract: An enterprise network 100 for tracking objects is provided. The network 100 includes: (a) a plurality of subscriber communication devices 134 and 138; (b) a plurality of readers 160, each of the communication devices being in communication with a corresponding reader, wherein each reader is operable to read a set of object identifiers, each object identifier in the set corresponding to an Identification device 168 positioned on a respective object 164; and (c) a location agent 324 operable to determine, from at least one of the sets of object identifiers, a physical location of each object 164 having an object identifier in the at least one of the sets of object identifiers.