Toggle Main Menu Toggle Search

Open Access padlockePrints

Occupancy Monitoring using Environmental & Context Sensors and a Hierarchical Analysis Framework

Lookup NU author(s): Dr Aftab Khan, Dr James Nicholson, Seb Mellor, Daniel Jackson, Dr Karim Ladha, Dr Cassim Ladha, Professor Patrick OlivierORCiD, Dr Thomas Ploetz



This is the authors' accepted manuscript of a conference proceedings (inc. abstract) that has been published in its final definitive form by ACM, 2014.

For re-use rights please refer to the publisher's terms and conditions.


Saving energy in residential and commercial buildings is of great interest due to diminishing resources. Heating ventilation and air conditioning systems, and electric lighting are responsible for a sig-nificant share of energy usage, which makes it desirable to optimise their operations while maintaining user comfort. Such optimisation requires accurate occupancy estimations. In contrast to current, of-ten invasive or unreliable methods we present an approach for accu-rate occupancy estimation using a wireless sensor network (WSN) that only collects non-sensitive data and a novel, hierarchical analy-sis method. We integrate potentially uncertain contextual informa-tion to produce occupancy estimates at different levels of granular-ity and provide confidence measures for effective building manage-ment. We evaluate our framework in real-world deployments and demonstrate its effectiveness and accuracy for occupancy monitor-ing in both low-and high-traffic area scenarios. Furthermore, we show how the system is used for analysing historical data and iden-tify effective room misuse and thus a potential for energy saving.

Publication metadata

Author(s): Khan A, Nicholson J, Mellor S, Jackson D, Ladha K, Ladha C, Hand J, Clarke J, Olivier P, Ploetz T

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: BuildSys '14 Proceedings of the 1st ACM Conference on Embedded Systems for Energy-Efficient Buildings

Year of Conference: 2014

Pages: 90-99

Acceptance date: 24/08/2014

Date deposited: 30/04/2016

ISSN: 9781450331449

Publisher: ACM


DOI: 10.1145/2674061.2674080