1. Final Progress Report
B 羅家偉, B 李冠毅, B 石致豪

2. Outline Brief Introduction Design Issues System Structure
Present Progress
Problems
Future Schedule
Q&A

3. Introduction
Construct a system that helps people flee from burning buildings.
What is the fire environment?
What are our prior design issues?

4. Design Issues Correctness Robustness
Ability to Represent the Outcome Easily
Immediateness
Power Consumption

5. Design Issues (Cont’) Correctness
We now use temperature to indicate whether a spot is safe.
Drawbacks?

6. Design Issues (Cont’) Robustness
Distributed system -- no center server.
Compute at the client ends.

7. Design Issues (Cont’) Ability to Represent the Outcome Easily
Show on hand held device like PDA.
Or show the indicator along passage. (hardware limitation)

8. Design Issues (Cont’) Immediateness Motes collect data previously.
Plug and play to save time.

9. Design Issues (Cont’) Power Consumption
Use AC to support motes in peacetime.
Batteries are used when fire.
A mote transmits data only when the temperature state changes.

10. System Structure Distributed System. State Table 3-Ways Hand Shake

11. System Structure (Cont’)
We divide the system into 3 parts.
Client Device
Run Java code to compute the best route.
Sensor Motes
Collect and maintain temperature data. When being requested, transmit data to the Client BaseStation.
Client BaseStation
Run nesC code on a mote to request data and forward it to the Client Device.

12. Present Progress We have been developing the communication framework.
We modified an original application Dissemination which uses reliable data transmission.
The sensor motes now can collect, flood and maintain data correctly.

13. Present Progress (Cont’)
The basestation now can receive data and forward it to the serial port.
We are now working on the three-way hand shake protocol.

14. Problems
Since there is only LED output device on mote, dealing with nesC bug is annoying.
We need a wide space to test the sensor network.

15. Future Schedule Finish communication framework before this semester.
Design the algorism to compute best route.
Design the GUI on client device to show the outcome.

16. Q&A
Any question?

17. Thank you!