Browse Prior Art Database

Methodology for Time Synchronization

IP.com Disclosure Number: IPCOM000122385D
Original Publication Date: 1991-Dec-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Johnson, WJ: AUTHOR [+3]

Abstract

This article describes a time protocol to synchronize the date and time among all the Local Area Network (LAN) servers in a network environment regardless of TIME ZONE and TIME CHANGE rules.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 66% of the total text.

Methodology for Time Synchronization

      This article describes a time protocol to synchronize the
date and time among all the Local Area Network (LAN) servers in a
network environment regardless of TIME ZONE and TIME CHANGE rules.

      In a Local Area Network environment there is a need for the
applications running on one LAN domain to update and exchange
information with the same application with a different application in
another LAN domain. If the date and time are not synchronized between
these domains, any exchange based on date and time by communicating
applications can produce undesirable results.

      This time protocol service is installed at the LAN Domain
Controller. The administrator is required to enter the TIME ZONE and
TIME CHANGE RULE. Also the Administrator is required to verify the
date and time for that machine. If this is the only Domain in that
LAN environment, this domain will be designated as the MASTER domain
for that network.

      When a new Domain is registered, this master domain will send
the time packet to the new Domain controller, similar to the figure
where:
 Scientific Time: The amount of time elapsed from a fixed origin.
        Time Zone: The difference in minutes between the universal
time and local time.
Time change rule: To determine the daylight saving time.
        Tolerance: The amount of tolerance suggested.

      The receiving Domain Controller will convert the time to its
local time zon...