| 摘要 |
PROBLEM TO BE SOLVED: To obtain service information in a street without crosstalk by executing optical communication with each portable information terminal in an information service station to respectively identify the terminals and transmitting service information corresponding to a request to each terminal. SOLUTION: An optical communication part 204 starts a system program stored in a main storage part 34 by a station control part 201 when the requesting signal of peripheral map information with the arrangement position of an information service station 2 as a center is received by Ir communication from the portable information terminal 1. When an application program read by the control part 201 is an information retrieval program, information is retrieved based on the program. When it is a route retrieval program, a route is retrieved based on its route retrieval algorism. When it is another information retrieval algorism, various kinds of information are obtained from various information groups as a retrieval result and a retrieval result is transferred to the portable information terminal 1 from the optical communication part 204 by Ir communication. |
