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1. (WO2017149889) COMMUNICATION DEVICE, COMMUNICATION METHOD, COMMUNICATION SYSTEM, ELECTRONIC WATCH, AND PROGRAM

Pub. No.:    WO/2017/149889    International Application No.:    PCT/JP2016/086420
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Thu Dec 08 00:59:59 CET 2016
IPC: G04R 20/26
G04R 20/30
G04G 5/00
G04R 20/02
G04R 20/06
H04W 92/08
Applicants: CASIO COMPUTER CO., LTD.
Inventors: IWAMIYA, Hiroshi
NAGASHIMA, Sadao
MICHITSUTA, Satomi
NAKAGAWA, Makoto
NISHIO, Toyokazu
Title: COMMUNICATION DEVICE, COMMUNICATION METHOD, COMMUNICATION SYSTEM, ELECTRONIC WATCH, AND PROGRAM
Abstract:
A communication system (1) comprises a central (100) and a peripheral (200). The central (100) receives location information and time information from NTP servers (10) and a location server (30). The central (100) creates first offset information of the time measured by its own device and the time information received from the NTP servers (10). The central (100) acquires from map information a time difference corresponding to a location presented by the location information received from the location server (30). The central (100) creates first updated time information based on the time measured by its own device, first offset information, and time difference corresponding to the location presented by the location information received from location server (30) and transmits the first updated time information to the peripheral (200). The peripheral (200) changes the time displayed by its own device based on the received first updated time information.