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

This study investigates the use of Wireless Sensor Networks (WSNs) in a retail store environment, focusing on enhancing interactivity, power efficiency, security, and range. The trial setup, requirements analysis, results, and conclusions are discussed, aiming to reduce development efforts and open the market for high-level developers. Work-in-progress includes abstraction from hardware level and the development of Akiba Sensor Node for improved system accessibility.

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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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