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NETWORK TERMINAL, NETWORK SYSTEM, TIME SYNCHRONIZATION METHOD, AND TIME SYNCHRONIZATION PROGRAM

  • US 20120027030A1
  • Filed: 04/05/2010
  • Published: 02/02/2012
  • Est. Priority Date: 04/10/2009
  • Status: Active Grant
First Claim
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1. A network terminal, comprising:

  • communication section that communicates with other network terminals connected via a network;

    time-series data creation section that, at timing set beforehand, creates time information including a correspondence between an identification number of the own network terminal and a current time measured by a timer of the own network terminal and creates time-series data registering the time information;

    additional registration section that, when the communication section receives the time-series data transmitted from another network terminal, creates time information including a correspondence between the identification number of the own network terminal and a current time measured by the timer of the own network terminal and additionally registers the time information to the time-series data received this time;

    transfer destination decision section that decides a network terminal as a transfer destination for each of time-series data created by the time-series data creation means section and time-series data to which the additional registration section additionally registers time information;

    transfer section that, every time the transfer destination decision section decides a transfer destination of the time-series data, makes the communication section transfer the time-series data;

    determination section that determines that time-series data to which the time information is additionally registered by the additional registration section satisfies a time-setting condition when the number of network terminals registering the time information a plurality of times exceeds a threshold number of network terminals set beforehand; and

    time-setting section that, when the determination section determines that the time-setting condition is satisfied, performs time-setting by correcting a time measured by the timer of the own network terminal on a basis of time information registered in the time-series data.

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