Abstract
Industrial wireless sensor networks (IWSNs) are a new communication paradigm targeted to applications in industrial environment that possesses unique characteristics and technical challenges than the traditional wired network architecture. The resource constraints of the wireless sensor devices along with highly dynamic nature of industrial environment inhibit in satisfying the diverse Quality of Service (QoS) demands of different industrial monitoring applications. To tackle the conflicting technical challenges, this paper presents EMLR-An Energy-aware Multi-constrained Localized QoS Routing protocol for IWSNs. EMLR employs localized routing to promote self-adaptability to network dynamics as well as achieving scalability. It exploits routing momentum-based greedy forwarding approach and defines a number of routing momentum based on the QoS parameters over which packets are routed to the sink. Energy efficiency is achieved utilizing energy-aware aggregated metric. EMLR reduces the protocol overhead considerably through local measurements of the QoS parameters without exchanging control packets among neighbors. Simulation results show that it is well-suited to industrial applications in terms of end-to-end latency, reliability, energy consumption and protocol overhead.