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RF 2 ID: A Reliable Middleware Framework for RFID Deployment

RF 2 ID: A Reliable Middleware Framework for RFID Deployment. Nova Ahmed Rajnish Kumar Umakishore Ramachandran College of Computing Georgia Institute of Technology. RFID Devices. Opportunity Low cost sensor solution No line of site problem Industry interest in large scale deployment

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RF 2 ID: A Reliable Middleware Framework for RFID Deployment

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  1. RF2ID: A Reliable Middleware Framework for RFID Deployment Nova AhmedRajnish KumarUmakishore RamachandranCollege of ComputingGeorgia Institute of Technology

  2. RFID Devices • Opportunity • Low cost sensor solution • No line of site problem • Industry interest in large scale deployment • Challenges • Error prone in nature • Vulnerable to physical environment • Large amounts of data

  3. Application Scenario Physical path for item flow Tagged item • Item Tracking • Tagged Items are moving • Readers are static • Ex: Warehouse Distribution , Airport Baggage Claim Scenario • Item Location • Tagged Items are static • Readers are moving • Ex: Disaster Scenario • A notion of Path in different scenarios Destinations Sources RFID readers

  4. System Architecture • A Path based System • Virtual Readers (VRs) – Distributed Computational Element • Physical RFID Readers (PRs) – Sensor Input Device • Path Server and Name Server – Decision Making Elements

  5. Physical Route in a Warehouse System

  6. Architectural Features meeting Design Goals • Reliability • A virtual reader for a number of physical readers • Path using virtual readers • Load shedding • VRs can drop data • Multiple flows • Paths are shared

  7. Logical Connectivity of Virtual Readers • Data Management • Path Management • Query Management

  8. Implementation • Prototype implementation complete • Virtual Reader • Paths • Physical readers and simulated physical readers • Tunable parameters to change reader accuracy • tag distance • tag angular position • reader power level • VRs Implemented as nodes in a cluster communicating using MPI

  9. Physical Reader Performance (1) Distance Dependency Angular Position Dependency Angular Position: 90 Degree Number of Reader Antenna : 2 Reader Power: 31.5 dB Distance: 15 inches Number of Reader Antenna : 2 Reader Power: 31.5 dB ALR 9800 with 2 antennas from Alien Technologies

  10. Physical Reader Performance (2) Attenuation Dependency Time Dependency Angular Position: 90 Degree Number of Reader Antenna : 2 Number of Tags: 6 Reader to Tag Distance: 15 inches Number of Reader Antenna : 2 Reader Power: 31.5 dB Number of Tags: 6

  11. Improving Reliability using a Single VR VR Reader1 Reader2 Number of Reader Antenna : 2 Reader to Route Distance: 10 inches Reader Power: 31.5 dB

  12. Improving Reliability using Multiple VRs (path) VR Reader Total Number of Tags : 10000 Simulation Iteration: 100

  13. Conclusions • Experiments showing unreliability of RFID devices • A middleware architecture for improving reliability • A prototype implementation • Performance results showing improvement in reliability

  14. Future Work • Implementing the full functionality of the architecture • Detailed performance analysis using more physical readers • GUI base User Interface for RF2ID deployment

  15. Thanks to RF2ID group members Robert Steven French Echezona Ukah Vladimir Urazov

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