Accession Number:

ADA626093

Title:

High-Bandwidth Tactical-Network Data Analysis in a High-Performance-Computing (HPC) Environment: Time Tagging the Data

Descriptive Note:

Final rept. Jul 2012-Dec 2014

Corporate Author:

TECHNICAL AND PROJECT ENGINEERING LLC ALEXANDRIA VA

Report Date:

2015-09-01

Pagination or Media Count:

28.0

Abstract:

The analysis of data from radio-based network testing typically requires that the latency of data leaving one node and arriving at a destination be determined. To properly calculate latency, transmit and receive times of network packets must be measured, and those times must be synchronized to a common source. The Global Positioning System GPS is a readily available time source that can be made available at each of the distributed nodes in a network. However, applying GPS-synchronized time tags to recorded network packets has proven to be a challenge due to microsecond drift, data stream buffering, and other technical issues. The process described in this report made use of post-test processing techniques to provide packet-level time tagging with an accuracy close to 3 microsecs relative to Coordinated Universal Time, with a resolution of 1 microsecs. This enabled analysis of high-speed wireless networks where a medium-sized packet can be delivered in under 1 ms.

Subject Categories:

  • Computer Systems Management and Standards

Distribution Statement:

APPROVED FOR PUBLIC RELEASE