LIEMRO_ A Low-Interference Energy-Efficient Multipath Routing Protocol for Improving QoS in Event-Based Wireless Sensor Networks
Marjan Radi, Behnam Dezfouli, Shukor Abd Razak, Kamalrulnizam Abu Bakar
Faculty of Computer Science and Information Systems
Universiti Teknologi Malaysia (UTM)
Johor, Malaysia
Abstract — In the recent years, multipath routing
techniques are recognized as an effective approach to
improve QoS in Wireless Sensor Networks (WSNs).
However, in most of the previously proposed protocols
either the effects of inter-path interference are ignored,
or establishing low-interference paths is very costly. In
this paper, we propose a Low-Interference Energyefficient
Multipath ROuting protocol (LIEMRO) for
WSNs. This protocol is mainly designed to improve
packet delivery ratio, lifetime, and latency, through
discovering multiple interference-minimized nodedisjoint
paths between source node and sink node. In
addition, LIEMRO includes a load balancing algorithm
to distribute source node’s traffic over multiple paths
based on the relative quality of each path. Simulation
results show that using LIEMRO in high traffic load
conditions can increase data reception rate and network
lifetime even more than 1.5x compared with single path
routing approach, while end-to-end latency reduces
significantly. Accordingly, LIEMRO is a multipath
solution for event-driven applications in which lifetime,
reliability, and latency are of great importance.
Keywords – Wireless Sensor Networks; QoS;
Multipath Routing; Load Balancing; Interference.
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