Estimates a position of a communication device 200 after a specific time according to a position detecting unit 207 that detects its own position, a communication status storage unit 202 that stores communication status data 202a indicating a wireless communication status at each position, and the position...http://www.google.es/patents/US20040203918?utm_source=gb-gplus-sharePatente US20040203918 - Communication device and communication system
Número de solicitud: 10/382,654 Número de publicación: US 2004/0203918 A1 Fecha de presentación: 7 Mar 2003 Patente emitida: US7206588 ( Fecha de emisión 17 Abr 2007)
