1. Baby Hunters Bill Liao Eugene Wang Richard Wang

2. Status Update The aim of this project is to set parent's minds at ease regarding the whereabouts of their children by use of an inconspicuous device worn on the child and a monitoring device to pinpoint the location of their child in cases of emergency.

3. BabyHunters Receiving Device PC/PDA BabyHunters Transmitting Device Eval Board Architecture Satellite GPS Module Cellular Module Cellular Tower GPS GPRS BabyHunter Server IP TCP Network GPS Module Data Storage CPU USB IP TCP Display GPS CPU RAM GSM GPRS

4. Use Cases Use Case 1 –BHTX device turns on –BHTX grabs GPS data –BHTX sends data to cellular network –Data arrives at Server –Server sends data to BHRX device Use Case 2 –BHRX device sends message to wake up BHTX device –Message goes through SMS to wake up BHTX device –BHTX grabs GPS data –BHTX sends data to cellular network –Data arrives at Server –Server sends data to BHRX device Use Case 3 –BHRX device sends message to wake up BHTX device –Attempt to wake up BHTX device fails –BHRX loads last known location of device with notification

5. Risks & Mitigation GPS data unavailable for TX Cellular Network unavailable for TX Packets lost on way between BHTX and BHRX BHRX attempts to wake up BHTX but fail Server fails Display last received data for RX Resend packet data Reload last location and attempt to wake up again Attempt to send GPS data through SMS

6. 2. Device sends GPS data GPRS 1. Device collects GPS data GPS A. Transmitting Device B. Data Center 3. Data received and processed by server C. Receiving Device 4. Reception of processed data as useful locating information IP/TCP, GPRS Baby Hunters Architecture

7. BabyHunters Receiver State Diagram Send info request Wait on info Update Display Display On OFF State Idling

8. BabyHunters Trasnmitter State Diagram Command Sending Signal Power Saving OFF

9. BabyHunters Server State Diagram Idle Wait On GPS Error Analyze Send To Client