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A traffic scheduler for real-time wireless communication in adaptable industrial automation systems

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3 Author(s)
Toscano, E. ; Dept. of Comput. Eng. & Telecommun., Univ. of Catania, Catania, Italy ; Misenti, F. ; Lo Bello, L.

Hybrid wired/wireless network architectures combine the flexibility and inexpensiveness of WLANs with the real-time performance of wired real-time networks. This paper describes both a scheduling framework and a scheduling algorithm to handle real-time communication over the wireless section of a hybrid wired/wireless industrial network, which uses a scheduled protocol that extends the IEEE 802.11n standard. The proposed scheduling framework is able to schedule real-time flows traversing one or multiple Access Points, providing both intra- and inter-cell scheduling. Moreover, the scheduling framework offers support for three different kinds of real-time flows, i.e., periodic, aperiodic, and sporadic. A simulative analysis is also provided to assess the computation times as a function of the number of flows and the number of schedulable flows in different scenarios.

Published in:

Emerging Technologies and Factory Automation (ETFA), 2010 IEEE Conference on

Date of Conference:

13-16 Sept. 2010