A dynamic bandwidth reassignment technique for improving QoS in EDF-based industrial wireless networks

Timeliness and reliability are two major requirements of control systems and this true, in particular, in many industrial application areas which make use of solutions distributed over a network. Moreover, with the adoption of wireless communication technologies in industrial environments, granting timeliness and reliability for transmissions over the wireless error-prone channel has become a challenge of primary importance. This paper presents a new technique which is able to grant the feasibility of a set of real-time periodic data exchanges over a wireless network in presence of retransmissions. Thanks to a dynamic bandwidth reassignment strategy, our solution is also able to cope with retransmissions efficiently, so as to improve the system performance in terms of overall data delivery success probability and without negatively affecting the real-time guarantees.