Preprint Article Version 1 This version is not peer-reviewed

A Calibrated Test-set for Measurement of Access-Point Time Specifications in Hybrid Wired/Wireless Industrial Communication

Version 1 : Received: 30 March 2018 / Approved: 30 March 2018 / Online: 30 March 2018 (16:33:11 CEST)

How to cite: Tramarin, F.; Narduzzi, C.; Vitturi, S.; Bertocco, M. A Calibrated Test-set for Measurement of Access-Point Time Specifications in Hybrid Wired/Wireless Industrial Communication. Preprints 2018, 2018030277 (doi: 10.20944/preprints201803.0277.v1). Tramarin, F.; Narduzzi, C.; Vitturi, S.; Bertocco, M. A Calibrated Test-set for Measurement of Access-Point Time Specifications in Hybrid Wired/Wireless Industrial Communication. Preprints 2018, 2018030277 (doi: 10.20944/preprints201803.0277.v1).

Abstract

In factory automation systems, hybrid wired/wireless networks are often deployed to connect devices of difficult reachability such as those mounted on mobile equipment. A widespread version of these networks makes use of Access Points (APs) to implement wireless extensions of Real--Time Ethernet (RTE) networks via the IEEE 802.11 Wireless LAN (WLAN). Unfortunately, APs may introduce random delays in packet forwarding, mainly related to the their internal behaviors (e.g. code processing times) that negatively impact on the whole performance of the automation systems. Consequently, the knowledge of these delays represent a crucial design information. This paper presents an original and effective method to measure the delays introduced by APs, exploiting a hybrid loop-back link and a simple set-up with moderate instrumentation requirements. The method, which requires an initial calibration by means of a reference AP, has been successfully tested on some commercial APs. As it will be shown, the proposed measurement procedure is general and, as such, can be profitably adopted in even different scenarios.

Subject Areas

Real-time systems; Industrial networks; calibration; measurements; access point; IEEE 802.11; WLAN

Readers' Comments and Ratings (0)

Leave a public comment
Send a private comment to the author(s)
Rate this article
Views 0
Downloads 0
Comments 0
Metrics 0
Leave a public comment

×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.