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Table of Contents
- Introduction
- Trial Setup
- Requirements Analysis
- Results
- Conclusion
- Work in Progress
- Question and Answer
A Study on the Use of Wireless Sensor Networks in a Retail Store - - PowerPoint PPT Presentation
A Study on the Use of Wireless Sensor Networks in a Retail Store - - PowerPoint PPT Presentation
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 Table of Contents Introduction Trial Setup Requirements
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Introduction
- Evaluate WSNs in retail enviroment
- Authors
Dawud Gordon Masayuki Iwai Michael Beigl
- Trial implementation in
Akihabara town, Tokyo
Created by Masayuki Iwai
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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
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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
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Setup (cont.)
XBridge
WWW server Client analysis
XBridge XBridge Firewall
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Setup (Cont.)
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Requirements
- Phase 1:
Mr. Iwai – application requirements Eliminates client/user stakeholder from this analysis
- Phase 2:
After Akihabara trial Document Mr. Iwai‘s needs
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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
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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
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Requirements - Interactivity
- Realtime input event reporting
Allows systems to have interactive feel Delay detracts from user experience
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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
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Requirements - Range
- 2 scenarios present
- High-density
10m sink-to-node
- Low-density
40m sink-to-node
WWW Server Client analysis WWW server Client analysis
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Requirements - Security
- Problem: Config interference
Broadcast affects all in range multiple apps multiple apps
- Grouping mechanism
- Inclusion
- NOT real security
Prevents interference, not attack
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Conclusion
- Trial provided good results
Sensory Interactivity Power Range
- System still too technical
Programming @ HW
▫ Bridge ▫ Node
Not accessable to high-level developers
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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