Slot assignment for TDMA MAC in industrial wireless sensor network

Abstract

Wireless sensor network in industrial environment (denoted IWSN) has data delivery time constraint. Due to the reactive routing and transmission collision, the data delivery time in IWSN with CSMA/CA scheme is unpredictable. In this paper, we utilize Time Division Multiple Access (denoted TDMA) MAC to avoid data collision and to bound transmission delay. Consider spatial reuse and data aggregation, a linear programming model with simulated anneal algorithm are used to solve the TDMA slot assignment problem in IWSN. Simulation results reveal excellent sensing data collection time and system operation life time for IWSN in the proposed slot assignment scheme.