Takahiro Goto, Kento Takabayashi and Ryuji Kohno
Wireless Networked Control Systems (WNCS) is attracting attention as a technology to realize to make efficient and reliable control systems utilizing wireless communication technologies. In particular, closed-loop feedback-control systems composed of a controller, sensors, and actuators, such as a glucose control system using an insulin pump for diabetes, are expected as important applications. Therefore, in order to guarantee high control quality, appropriate design of media access control (MAC) protocol to ensure low latency and reliability under coexistence of multiple feedback-control systems is required. This paper proposes a TDMA-based MAC protocol design utilizing the over-hearing scheme to satisfy such a requirement. The packet delivery rate is analyzed when the algorithm using over-hearing is executed. Moreover, the control quality performance of the WNCS systemusing proposal protocol is evaluated by computer simulation.
A Dependable MAC Protocol Based on TDMA for Coexistence of Feedback-Control Systems