06314295 is referenced by 119 patents and cites 29 patents.

A radiocommunication system including a portable terminal, a base station and a server. The portable terminal transmits a destination to the server and further sends the ID number (CD_ID) of the base station coupled through a radio link to the portable terminal. The server has a table representative of a corresponding relationship between the ID number of the base station and the standing position of the base station and retrieves the position corresponding to the ID number thereof as the present position of the portable terminal from the table. Further, the server transmits map data corresponding to the present position of the portable terminal to the portable terminal.

Title
Terminal unit, position display method, information providing system, and information providing method
Application Number
8/771146
Publication Number
6314295 (B1)
Application Date
December 20, 1996
Publication Date
November 6, 2001
Inventor
Yoji Kawamoto
Tokyo
US
Agent
Frommer Lawrence & Haug
US
Agent
Gordon Kessler
US
William S Frommer
US
Assignee
Sony Corporation
US
IPC
H04Q 7/20
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