Abstract
Wireless control system for industrial automation has been gaining increasing popularity in recent years thanks to their ease of deployment and the low cost of their components. However, traditional low sample rate industrial wireless sensor networks cannot support high-speed application, while high-speed IEEE 802.11 networks are not designed for real-time application and not able to provide deterministic feature. Thus, in this paper, we propose Det-WiFi, a real-time TDMA MAC implementation for high-speed multihop industrial application. It is able to support high-speed applications and provide deterministic network features since it combines the advantages of high-speed IEEE802.11 physical layer and a software Time Division Multiple Access (TDMA) based MAC layer. We implement Det-WiFi on commercial off-the-shelf hardware and compare the deterministic performance between 802.11s and Det-WiFi under the real industrial environment, which is full of field devices and industrial equipment. We changed the hop number and the packet payload size in each experiment, and all of the results show that Det-WiFi has better deterministic performance.
Highlights
In recent years, wireless communication has gained significant importance in industrial automation
We focus on the transmission delay of MAC layer and packets loss ratio, which show the deterministic performance of the network
We propose the Det-WiFi, which aims to provide support for high-speed multihop industrial deterministic demand application
Summary
Wireless communication has gained significant importance in industrial automation. The real-time performance of Soft-TDMAC is great in testbed result due to the centralized network structure and TDMA based MAC layer It is not designed for control applications. RT-WiFi [18] aims to provide high sampling rate and deterministic timing guarantee on packet delivery in wireless control systems It is based on a TDMA data link layer combined with IEEE 802.11 physical layer. We provide a detailed presentation of the Det-WiFi, which is able to provide support for highspeed multihop industrial deterministic application It adopts a centralized network architecture and uses time division multiplexing access strategy to provide end-to-end delay guarantee of data.
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