A method for communicating to a recipient transceiver from a plurality of transceivers located within the broadcast range of the recipient transceiver includes: transmitting a communication at a first power level such that only a first group of transceivers receive the broadcast, the communication including...http://www.google.fr/patents/US20090121841?utm_source=gb-gplus-shareBrevet US20090121841 - SCREENING TRANSMISSIONS FOR POWER LEVEL AND OBJECT IDENTIFIER IN ASSET MONITORING AND TRACKING SYSTEMS
SCREENING TRANSMISSIONS FOR POWER LEVEL AND OBJECT IDENTIFIER IN ASSET ...
Numéro de demande: 12/353,961 Numéro de publication: US 2009/0121841 A1 Date de dépôt: 14 janv. 2009 Brevet délivré: US7742744 ( Date de délivrance 22 juin 2010)
