| 摘要 |
Mobiles (10) are in radio contact with fixed base (1) which has server and global data base. Radio links are telephony (2,12), global positioning (3,13) and traffic data (4,14). Each mobile has microprocessor (20), screen (22) and keyboard (21) and is linked to memories (30, 31) and calculator (32). User may automatically receive details of local service providers using various operational modes. |
