MAC SCHEDULING IN INDUSTRIAL WIRELESS CELL-BASED MESH SENSOR NETWORKS
Undergoing developments for the adaptation of Wireless Sensor Networks (WSNs) in automation industry is creating several research questions. The usage of wireless technologies in industrial environments requires real-time reliability and security. Many standards for WSNs and Industrial Wireless Sensor Networks (IWSNs) have been developed. The list includes WirelessHART , ISA100.11a , Zigbee , IEEE 802.15.4, and IEEE 802.15.4a etc.Recently a new network topology “Cell-Based Mesh Networks”  has been developed in an effort to make IWSNs feasible for large scale deployments in process automation industries. Cell-Based Mesh Network topology inherits the qualities of star-mesh topology and mesh topology, and also offers many additional features.Reliability of an IWSN significantly depends on the real-time scheduling of the network. During this thesis work a scheduling mechanism has been developed by exploiting the features of a Cell-based Mesh Network. The idea of superframes’ further partitioning into time-cells of 100ms duration is presented, these 100ms time-cells guarantees interlocking data transmission  within 100ms. The closed loop control data  transmission is guaranteed by assigning dedicated time-slots. The performance evaluation of the presented scheduling mechanism is done by considering two case studies i.e. oil-industry and paper & pulp industry.
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