Sep 29, 2017
Jolley Hall, Room 309
"High-Performance Wireless Sensor-Actuator Networks for Industrial Internet of Things"
Adviser: Chenyang Lu
Wireless Sensor Actuator Networks (WSANs) are being adopted as an enabling technology for the industrial Internet of Things (IoT) in process industries. Industrial applications pose significant challenges due to their demands for reliable and real-time performance in dynamic environments. While industrial WSAN protocols, such as WirelessHART, incorporate a specific set of network mechanisms to tackle these challenges, there is still significant potential for improving the efficiency, robustness, and adaptability of industrial WSANs. Our work to date has explored different networking features of industrial WSAN protocols to enhance reliable and real-time communication. We first developed an experimental testbed realizing the key networking features of the industrial WSAN protocols, such as Time Slotted Channel Hopping (TSCH) MAC and source and graph routings, and performed a series of empirical studies to uncover the limitations and potential improvements of these networking features. We then investigated the impacts of the industrial WSAN protocol's channel selection mechanism on routing and real-time performance, and presented channel and link selection strategies that improve route diversity and network schedulability. To enhance real-time performance, we designed a channel reuse algorithm that introduces channel reuse conservatively to maintain a high degree of reliability. Finally, here we propose to integrate fast Glossy flooding into an industrial WSAN protocol to provide an efficient dissemination mechanism for WSAN adaptation. We will design a multi-mode dissemination policy that utilizes Glossy along with the traditional broadcast approach, aiming to achieve fast network reconfiguration while reducing energy cost.