Server, method, recording medium, and system for maintaining accuracy of time

A method implemented by a server that collects data and temporal data about an electronic device corresponding to the collected data together at regular intervals from the electronic device and corrects the temporal data about the electronic device corresponding to the collected data, the method comprising:

• a synchronizing step of executing synchronization processing on the electronic device at a server time T1 for synchronization between a time of the server and a time of the electronic device and executing synchronization processing on the electronic device at a time T2 of the server for synchronization with a time of the electronic device based on the server time T2, the server time T2 being a time when a predetermined time interval comes to an end;
• a collecting step of collecting multiple (n) data segments and temporal data segments about the electronic device corresponding to the collected data segments together acquired by the electronic device in a period from the synchronization processing at the server time T1 to the synchronization processing at the server time T2;
• and
• a correcting step of correcting the temporal data segments corresponding to the n data segments based on a synchronization shift amount that is a time difference between the server time T2 and temporal data T2′ about the electronic device corresponding to the server time T2.

A recording medium storing a program in a computer-readable manner, the program causing a computer to function as a server that collects data and temporal data about an electronic device corresponding to the collected data together at regular intervals from the electronic device and corrects the temporal data about the electronic device corresponding to the collected data, execution of the program on the computer causing the computer to execute:

• synchronization processing on the electronic device at a server time T1 for synchronization between a time of the server and a time of the electronic device and synchronization processing on the electronic device at a time T2 of the server for synchronization with a time of the electronic device based on the time T2 of the server, the server time T2 being a time when a predetermined time interval comes to an end;
• collection processing of collecting multiple (n) data segments and temporal data segments about the electronic device corresponding to the collected data segments together acquired by the electronic device in a period from the synchronization processing at the server time T1 to the synchronization processing at the server time T2;
• and
• correction processing of correcting the temporal data segments corresponding to the n data segments based on a synchronization shift amount that is a time difference between the server time T2 and temporal data T2′ about the electronic device corresponding to the server time T2.

A system comprising an electronic device, and a server that collects data and temporal data about the electronic device corresponding to the collected data together at regular intervals from the electronic device and corrects the temporal data about the electronic device corresponding to the collected data,

• the server comprising:
• a synchronizing unit that executes synchronization processing on the electronic device at a server time T1 for synchronization between a time of the server and a time of the electronic device and executes synchronization processing on the electronic device at a server time T2 for synchronization between a time of the server and a time of the electronic device, the server time T2 being a time when a predetermined time interval comes to an end;
• a collecting unit that collects multiple (n) data segments and temporal data segments about the electronic device corresponding to the collected data segments together acquired by the electronic device in a period from the synchronization processing at the server time T1 to the synchronization processing at the server time T2;
• and
• a correcting unit that corrects the temporal data segments corresponding to the n data segments based on a synchronization shift amount that is a time difference between the server time T2 and temporal data T2′ about the electronic device corresponding to the server time T2,
• the electronic device comprising:
• a sensor measuring unit that acquires data and temporal data about the electronic device corresponding to the acquired data together in response to the synchronization processing executed at the server time T1 by the server;
• a sensor communicating unit that transmits data to the server in response to the synchronization processing executed at the server time T2 by the server, the transmitted data containing the multiple (n) data segments and the temporal data segments about the electronic device corresponding to the collected data segments acquired from the server time T1 to the server time T2, and a time T2′ of the electronic device corresponding to the server time T2;
• and
• a sensor clock unit that synchronizes a time of the electronic device with a time of the server in response to synchronization processing executed at a time of the server by the server.