Method and apparatus to implement a “virtual” real-time clock at a terminal based on time information from multiple communication systems. At least one system (e.g., GPS) provides “absolute” time information for the virtual real-time clock, and at least one other system (e.g., a cellular system)...http://www.google.fr/patents/US20090251367?utm_source=gb-gplus-shareBrevet US20090251367 - VIRTUAL REAL-TIME CLOCK BASED ON TIME INFORMATION FROM MULTIPLE COMMUNICATION SYSTEMS
VIRTUAL REAL-TIME CLOCK BASED ON TIME INFORMATION FROM MULTIPLE ...
Numéro de demande: 12/484,877 Numéro de publication: US 2009/0251367 A1 Date de dépôt: 15 juin 2009 Brevet délivré: US7911381 ( Date de délivrance 22 mars 2011)
