1. Intelligent Database Systems Lab 國立雲林科技大學 National Yunlin University of Science and Technology 1 Wireless Sensor Network Wireless Sensor Network Based Mobile Pet Game Advisor : Dr. Hsu Presenter : Chia-Hao Yang Author : Liang Liu, Huadong Ma SIGCHI 06

2. Intelligent Database Systems Lab N.Y.U.S.T. I. M. 2  Motivation  Objective  Method  Experiments  Conclusions  Wireless sensor network Outline

3. Intelligent Database Systems Lab N.Y.U.S.T. I. M. 3 Motivation  In current mobile pet game, the life space of virtual pet is a pure virtual space, entirely separates with physical world.

4. Intelligent Database Systems Lab N.Y.U.S.T. I. M. 4 Objective  To create wireless sensor network based mobile pet game (WSNMP), combine the concept of wireless sensor network with mobile pet game. ─ Including environmental date, the pet game will be entertaining. ─ It can examine & evaluate the life environment for players. ─ It also has the capability of monitoring.

5. Intelligent Database Systems Lab N.Y.U.S.T. I. M. 5 Method  Architecture for WSNMP ─ Users deploy several sensor nodes in their house, and each sensor node corresponds a virtual pet. ─ Process: These sensor nodes make up a wireless network connected with Internet via home gateway The handle mobile device connects with Internet via packet access network, and visits the pet game server or interacts with wireless sensor networks via pet game server. ─ Entities: sensor node: executing instructions, collecting & sending environment data home gateway: merging wsn & mpg handle mobile device: sending commands & getting information of virtual pet pet game server: a bridge between wsn & handle mobile device Environment aware self-reconfiguration

6. Intelligent Database Systems Lab N.Y.U.S.T. I. M. 6 Method ─ Interaction workflows among entities: Handle mobile device, pet game server  users send commands to pet game server via mobile handle device to control virtual pets WSN, pet game server  wireless sensor networks’ events trigger execution of pet game server Handle mobile device, WSN  if users want to review sensory data from sensor nodes, they send commands to home gateway via pet game server

7. Intelligent Database Systems Lab N.Y.U.S.T. I. M. 7 Experiments  We implemented a simple virtual pet game, S-Pet, based on our gaming platform.  Real-time monitoring

8. Intelligent Database Systems Lab N.Y.U.S.T. I. M. 8 Experiments  Emergency alert ─ The temperature data collected from sensor node can be transferred to mobile pet server via home gateway

9. Intelligent Database Systems Lab N.Y.U.S.T. I. M. 9 Conclusions  This paper has proposed a novel architecture for the integrating of sensor network into mobile pet game. And we use our environment aware self- reconfiguration mechanism to create a gaming platform.  This change can not only enhance entertainment of games, but also inject practicability into mobile pet game.

10. Intelligent Database Systems Lab N.Y.U.S.T. I. M. 10 Wireless sensor network  WSNs, consisting of many small, low-cost, spatially dispersed, communicating nodes, have been used in many applications, such as environmental monitoring and so on. ─ Sensor node : data sampling & simple packet forwarding ─ Limitation: battery power, computation capability, memory ─ Sink node : it has much more computational capabilities

11. Intelligent Database Systems Lab N.Y.U.S.T. I. M. 11 Environment aware self-reconfiguration mechanism  It executes task reconfiguration according to a sensing-analyzing- performing process. ─ Decision making : detecting changes & determining whether they can cause reconfiguration ─ Script providing: generating, storing, managing and sending scripts to appointed nodes ─ Script executing : executing application scripts transmitted from script providing

12. Intelligent Database Systems Lab N.Y.U.S.T. I. M. 12 State transition chart  It represents as if P then Q, where P denotes a transitional condition and Q denotes a state wanted to transfer.  Each state can be described by one or multi 8-bits. These 8-bits define the type of collecting data and sampling frequency. ─ Example : “collecting temperature value once per second” ─ 0x81(10000001)