Superframe Scheduling for Data Aggregation in WirelessHART Networks

WirelessHART has become an industrial standard for robust and real-time wireless monitoring and control. While energy-efficiency is one of the key design considerations for networks with battery-operated devices, data aggregation has been widely studied in the wireless sensor network (WSN) environments to reduce the traffic and prolong the lifetime of the network. However, existing data aggregation techniques cannot be applied directly to WirelessHART networks due to the multi-channel Time Synchronized Mesh Protocol (TSMP) and the superframe-based communication slot scheduling in WirelessHART. In this work, we propose a data aggregation mechanism for energy-efficient and real-time WirelessHART communication. In particular, a greedy-based heuristic is applied during the superframe construction phase to assign package transmissions whose data can be aggregated at intermediate routing nodes into nearby time slots. Experimental results show that compared with existing WirelessHART routing algorithms, our proposed framework has significantly improvement on the energy saving and prolongs the overall lifetime of the network.