%0 Journal Article
	%A Malka N. Halgamuge and  Toong-Khuan Chan and  Priyan Mendis
	%D 2009
	%J International Journal of Civil and Environmental Engineering
	%B World Academy of Science, Engineering and Technology
	%I Open Science Index 28, 2009
	%T Improving Multi-storey Building Sensor Network with an External Hub
	%U https://publications.waset.org/pdf/6784
	%V 28
	%X Monitoring and automatic control of building environment
is a crucial application of Wireless Sensor Network (WSN)
in which maximizing network lifetime is a key challenge. Previous
research into the performance of a network in a building environment
has been concerned with radio propagation within a single floor. We
investigate the link quality distribution to obtain full coverage of
signal strength in a four-storey building environment, experimentally.
Our results indicate that the transitional region is of particular concern
in wireless sensor network since it accommodates high variance
unreliable links. The transitional region in a multi-storey building
is mainly due to the presence of reinforced concrete slabs at each
storey and the fac┬©ade which obstructs the radio signal and introduces
an additional absorption term to the path loss.
	%P 202 - 205