Accession Number : ADA311584

Title :   Time Synchronization in Distributed Simulations.

Descriptive Note : Final rept.,

Corporate Author : FYSISCH EN ELEKTRONISCH LAB TNO THE HAGUE (NETHERLANDS)

Personal Author(s) : Luiijf, H. A. ; Kampen, R. van

PDF Url : ADA311584

Report Date : MAY 1996

Pagination or Media Count : 37

Abstract : This report presents the results of cooperative research conducted between TNO-FEL and the Institute for Simulation and Training (1ST), and Veda, Inc., both located in Orlando, FL. The research focuses on two areas: examining the characteristics of Integrated Services Digital Networks (ISDN), and conducting DIS experiments using absolute timestamps across a Wide Area Network (WAN). Each of these areas are relevant to the DIS community. ISDN is potentially a valuable asset as a primary or backup communications link, offering relatively high bandwith, increasing availability and low costs, whereas the use of absolute time is a fundamental yet somewhat unresolved issue in distributed (interactive) simulation. Our experiences in setting up an absolute time source and in configuring the Network Time Protocol (NTP) are well documented in later sections, which we hope will be seen as a valuable reference. Additionally, references are cited which address the key issues of latency, variance, time synchronization, and dead reckoning, and are highly recommended reading to gain a clearer insight into the issues involved in the use of absolute timestamps in distributed simulations.

Descriptors :   *COMPUTER COMMUNICATIONS, *WIDE AREA NETWORKS, COMPUTERIZED SIMULATION, DIGITAL SYSTEMS, INTEGRATED SYSTEMS, LOW COSTS, NETHERLANDS, GAIN, SYNCHRONIZATION(ELECTRONICS).

Subject Categories : Computer Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE