Final Report on the Investigation of Asynchronous Events in Non-Time-Managed Federations

PDF

Authors
  1. Bleichman, D.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);Cogsim Technologies, Ottawa Ont (CAN)
Abstract
A study was developed and conducted at DRDC Atlantic to examine the relationship between (1) Wide Area Network (WAN) characteristics (i.e., latency and latency variability) and (2) High Level Architecture (HLA) federation characteristics (e.g., frequency of the occurrence of events as indexed by the frequency of the exchange of messages, event handling time and federation size) to the probability of an asynchronous event occurrence in non-time-managed federations. The study was conducted using federates sending or receiving wall-clock timestamped HLA messages over an emulated WAN while all hardware clocks of the participating machines were synchronised. The time-stamp of each received message was examined and used in order to determine out-of-sequence arrival. Results show that in a non-time-managed federation executing over a WAN with realistic network delays, the probability of asynchronous events occurring is significant and depends on both network characteristics and message rates.

Il y a un résumé en français ici.

Keywords
HLA;Wide Area Network (WAN);Latency;Federation;Distributed simulation;HLA (High Level Architecture)
Report Number
DRDC-ATLANTIC-CR-2005-182 — Contractor Report
Date of publication
01 Sep 2005
Number of Pages
46
DSTKIM No
CA026464
CANDIS No
524326
Format(s):
Electronic Document(PDF)

Permanent link

Document 1 of 1

Date modified: