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A Study on the Use of Wireless Sensor Networks in a Retail Store

Dawud Gordon TU Braunschweig Institute of Operating Systems and Computer Networks www.ibr.cs.tu-bs.de/dus. A Study on the Use of Wireless Sensor Networks in a Retail Store. Table of Contents. Introduction Trial Setup Requirements Analysis Results Conclusion Work in Progress

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A Study on the Use of Wireless Sensor Networks in a Retail Store

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  1. Dawud Gordon TU Braunschweig Institute of Operating Systems and Computer Networks www.ibr.cs.tu-bs.de/dus A Study on the Use of Wireless Sensor Networks in a Retail Store

  2. Table of Contents • Introduction • Trial Setup • Requirements Analysis • Results • Conclusion • Work in Progress • Question and Answer

  3. Introduction • Evaluate WSNs in retail enviroment • Authors • Dawud Gordon • Masayuki Iwai • Michael Beigl • Trial implementation in Akihabara town, Tokyo • Created by Masayuki Iwai

  4. Introduction (cont.) • Goals of study • Gather experience • Reduce development effort • Open market for high-level developers • Methods: Requirements analysis • Improve requirement definition • Specify weak spots

  5. Trial Setup • In-store front-end • Network • Objects + nodes • Sink nodes/bridges • Display • Monitor • Countertop • Central back-end • Server-based client analysis • Feedback to in-store system • Output • To owner • To client

  6. Setup (cont.) Firewall XBridge Client analysis XBridge WWW server XBridge

  7. Setup (Cont.)

  8. Requirements • Phase 1: • Mr. Iwai – application requirements • Eliminates client/user stakeholder from this analysis • Phase 2: • After Akihabara trial • Document Mr. Iwai‘s needs

  9. Requirements - Configuration • Application needs to adapt • Changing conditions in store • Market analysis • Dynamic changes during runtime • By developer/SmartStore server • Remote access from WWW (through firewall) • OTAC • By store owner • Remotely from application within LAN • OTAC • Multiple nodes at once + acked config • Allows reconfig of entire application • Saves time during development

  10. Requirements - Sensors • Vibration • Think ballswitch • Differentiation: • At rest • In user‘s hand • Light sensor • Large lux ranges • Bottoming out • Saturation • Differentiation • Store interior • Store front

  11. Requirements - Interactivity • Realtime input event reporting • Allows systems to have interactive feel • Delay detracts from user experience

  12. Requirements - Power • Battery changes effort-expensive • Store‘s hours • System not active • Sleep mode • Save battery • Reduce maintenance • Manual override higher priority • Battery • TTD • Alert @ TTD = 24 hrs

  13. Requirements - Range • 2 scenarios present • High-density • 10m sink-to-node • Low-density • 40m sink-to-node Client analysis Client analysis WWW Server WWW server

  14. Requirements - Security • Problem: Config interference • Broadcast affects all in range • multiple apps • multiple apps • Grouping mechanism • Inclusion • NOT real security • Prevents interference, not attack

  15. Conclusion • Trial provided good results • Sensory • Interactivity • Power • Range • System still too technical • Programming @ HW • Bridge • Node • Not accessable to high-level developers

  16. Work in Progress • Abstraction from HW level • Think: HTML • Point + click • Akiba Sensor Node • In development • Will fulfill requirements • D-Bridge • Prototype • Embedded application • Webserver

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