@article{(Open Science Index):https://publications.waset.org/pdf/6784, title = {Improving Multi-storey Building Sensor Network with an External Hub}, author = {Malka N. Halgamuge and Toong-Khuan Chan and Priyan Mendis}, country = {}, institution = {}, abstract = {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.}, journal = {International Journal of Civil and Environmental Engineering}, volume = {3}, number = {4}, year = {2009}, pages = {202 - 205}, ee = {https://publications.waset.org/pdf/6784}, url = {https://publications.waset.org/vol/28}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 28, 2009}, }