The document introduces Cassowary, a middleware platform designed for context-aware smart buildings that utilizes software-defined sensor networks (SDSN). It addresses the limitations of existing smart building approaches by offering a more dynamic and configurable solution for multi-tenanted environments. Future work includes deploying Cassowary in real building settings and expanding its capabilities to integrate multiple buildings for improved energy efficiency.

1. Cassowary: Middleware Platform for Context-Aware
Smart Buildings with Software-Defined Sensor Networks
Pradeeban Kathiravelu, Leila Sharifi, Lu´ıs Veiga
Distributed Systems Group, INESC-ID Lisboa
Instituto Superior T´ecnico, Universidade de Lisboa
Lisbon, Portugal
NavTalk, FCUL, Lisboa
20th
of November, 2015.
To be presented in
2nd Workshop on Middleware for Context-Aware Applications in the IoT (M4IOT 2015)
co-located with ACM/USENIX/IFIP Middleware 2015
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2. Introduction
Introduction
Internet of Things (IoT) and ubiquitous computing.
An exponential growth in the connected devices.
IoT applications compose a highly condensed network of devices
within a small enclosed area.
Smart buildings: buildings with the IoT elements integrated.
sensors.
controllers.
computing elements.
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3. Motivation
Motivation
Existing approaches in smart buildings do not cater the dynamic
nature of the buildings.
Heterogeneous and dynamic devices.
Devices without a sensor, or dumb devices.
Dynamic or moving occupants.
System and user level policies and control.
Lack of configurability for the building spaces
shared by multiple tenants.
with varying preferences.
Software-Defined Networking (SDN) - separation of control from
execution of the logic.
Software-Defined Sensor Networks (SDSN).
Existing SDSNs are not leveraged for smart buildings.
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4. Motivation
Multi-Tenanted Building Spaces
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5. Motivation
Multi-Tenanted Building Spaces
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6. Motivation
Multi-Tenanted Building Spaces
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7. Motivation
Multi-Tenanted Building Spaces
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8. Motivation
Multi-Tenanted Building Spaces
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9. Motivation
Multi-Tenanted Building Spaces
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10. Motivation
Multi-Tenanted Building Spaces
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11. Motivation
Multi-Tenanted Building Spaces
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12. Motivation
Multi-Tenanted Building Spaces
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13. Architecture
Cassowary
A middleware platform for Context-Aware Smart Buildings with
Software-Defined Sensor Networks.
Context-aware Software-Defined Smart Buildings.
By extending SDN paradigm and leveraging message oriented
middleware protocols
To seamlessly connect the smart devices of the buildings to the
centralized SDN controller.
Leveraging Message-Oriented Middleware to effectively communicate
the control actions between the devices.
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14. Architecture
Application Layer Higher Level View
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15. Architecture
Deployment Architecture
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16. Architecture
Network Layer Higher Level View
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17. Implementation
Cassowary Minimalist Approach Assessment
Table : Quality of Service Assessment of Cassowary
Feature HVAC Light Sources TV/Displays
Energy Efficiency
Tenant Comfort N/A
Acoustic/Light Pollution N/A
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18. Implementation
Temperature Control
T =
n
i=1
(Ti
xi
)
n
i=1
( 1
xi
)
(1)
where,
T - Temperature chosen by the air conditioning system.
n - Number of tenants considered by the system to be in close proximity.
Ti - Preferred temperature from the tenant profile of tenant i.
xi - Distance of tenant i to the HVAC system.
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19. Implementation
Illumination Control
L = F(dmin, Ls) (2)
Here,
L - Light intensity to ensure.
Ls - Sensed external or natural light.
dmin - Distance to the nearest tenant for the given enclosure.
L = k ∗
1
dmin
∗
1
Ls
(3)
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20. Conclusion
Related Work
Sensor OpenFlow.
Adopting SDN into Wireless Sensor Networks (WSN).
Aware Home: Context-Aware Buildings.
A smart floor with a few strategically located tiles to collect footstep
information of the occupants.
Software-Defined Buildings.
A term coined by the University of California at Berkeley.
A building operating system (BOS) atop which the other firmware
applications of the other appliances execute.
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21. Conclusion
Conclusion
Conclusions
Cassowary offers a context-aware sensor network for smart buildings.
A middleware platform for multi-tenanted energy provisioning in the
buildings.
Future Work
Deploying Cassowary on a physical building environment.
Extending Cassowary to coordinate multiple buildings
to enable energy efficient building complexes and cities.
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22. Conclusion
Thank you
Kathiravelu, P., Sharifi , L., & Veiga, L. (2015). Cassowary: Middleware Platform for Context-Aware Smart Buildings
with Software-Defined Sensor Networks . In 2nd Workshop on Middleware for Context-Aware Applications in the IoT
(M4IOT 2015), co-located with ACM/USENIX/IFIP Middleware 2015 . Dec.2015. 6 pages. to appear.
Thank you!
Questions?
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