Patent ID: 6078808
Filing Date: 2000-06-20
Classification: G08B

Abstract:
A radio data communication method for radio-transmitting a file from a transmitting device to portable terminals, the portable terminals having memory means for storing a file, said method comprising the steps of:(a) converting, in the transmitting device, a file including data other than data in a previously determined specific code set into message data in a message format made up of data in the specific code set;(b) radio-transmitting the message data from the transmitting device; and(c) carrying out reverse-conversion in a portable terminal by preparing, based on the received message data in message format, a file equivalent to the file in the transmitting device, and storing the file in the memory means,wherein, in the step (a), the file is converted into updating data that is message data indicative of a part that has been changed and content how the part has been changed, and in the step (c), the part, of the file stored in, the memory means, that is to be changed is updated in accordance with the updating data,further comprising the step of displaying the changed part of the updated file in a form of display that is different from others that have not changed.