1. Wireless Sensor Network - course: Project to investigate requirements and applications using wireless sensor networks on a construction site
Ykä Marjanen

2. Background: Wireless Sensor Networks
Usable technology available for less than a decade
Growing number of sensors and need to gather information generate need for WSN applications
Military applications
Health monitoring
Vehicle tracking and detection
Wireless communication getting more popular
Wireless sensor network topology and protocols still under development
Needs to be simple, efficient, low-power, robust, low-cost, etc

3. Background: Road Construction
Very complex and hectic environment
Many processes and work phases are done manually
Multiple subcontractors and machines from different manufacturers
Normally small companies
VTT Electronics has developed and tested wireless communication possibilities
Need to share information more efficiently

4. Using WSN as Part of a Road Construction Site: Requirements
Robust and fault tolerant
Low-cost
Scalable
Universal
Easy to use;
transmission and topology
invisible to user.
Low power consumption

5. Using WSN as Part of a Road Construction Site: Possibilites
Vast international markets
Many possible applications from billing to automated machines
Large number of sensors and users
Current technology level low
Fierce competition

6. Using WSN as Part of a Road Construction Site: Protocol Needs
Robust
Secure
Fast transmission
Good transmission range
Usage of different wireless technologies
GPRS, GSM, WIMAX, WLAN
Simple interface to hardware and application
Simple universal language

7. Using WSN as Part of a Road Construction Site: Example Applications
Sensor and actuator collaboration between machines
Loading gravel to a truck
Grinding a road
Automation of processes
Billing using database and machine communication
Assignment of work schedules
Quality control of a road
Maintenance scheduling
Work supervising

8. Proposed Schematics Sink controls local nodes Nodes have unique ID
Locally nodes can communicate without the sink
Nodes include sensors and actuators
Sinks relay the message to outside
Sink allows usage of a node from outside
Physical layer uses available wireless
technologies
Data link layer and MAC includes secure and
ID features
MAC releases the packet to the network layer
in standard format

9. THANK YOU