Opportunistic scheduling of control tasks over shared wireless channels

Conference Paper

We consider a wireless networked control system with multiple loops closing over a shared wireless medium. To avoid interferences a centralized scheduler decides which control task accesses the channel at each time step, opportunistically based on the random wireless channel conditions that systems experience. We formulate the problem of designing channel-aware scheduling and transmit power allocation mechanisms that guarantee Lyapunov-like performances for all control tasks in expectation over the channel conditions, while they also minimize the total power expenditures. Exploiting the zero duality gap, optimal variables are obtained by solving at the dual domain either offline, or online based on the observed random channel sequence. Simulations illustrate the power savings of the opportunistic scheme.

Full Text

Duke Authors

Cited Authors

  • Gatsis, K; Pajic, M; Ribeiro, A; Pappas, GJ

Published Date

  • April 2014

Published In

  • Cyber Physical Systems (Iccps), 2014 Acm/Ieee International Conference On

Start / End Page

  • 48 - 59

Digital Object Identifier (DOI)

  • 10.1109/ICCPS.2014.6843710