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RFID estimation—impact of blocker tags

RFID estimation—impact of blocker tags

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This chapter formally defines a new problem of RFID estimation with the presence of blocker tags and makes the first piece of effort that towards providing an efficient solution. The proposed RFID Estimation scheme with Blocker tags (REB) is compliant with the commodity EPC C1G2 standard, and does not require any modifications to off-the-shelf RFID tags. REB provides an unbiased functional estimator which can guarantee any degree of estimation accuracy specified by the users. Using REB, a retailer can monitor the product stock in a timely manner; meanwhile, the blocker tags are being used to protect the privacy of some important items. Rigorous analysis is given to optimize the parameters of REB to minimize its time cost and energy cost. A trade-off between the time cost and energy cost can be flexibly controlled to satisfy the practical requirements. Extensive simulation results has revealed the advantages of REB over prior schemes in terms of estimation accuracy, time efficiency, and energy efficiency.

Chapter Contents:

  • 4.1 Introduction
  • 4.1.1 Background and motivation
  • 4.1.2 Problem statement
  • 4.1.3 Limitations of prior art
  • 4.1.4 Proposed approach
  • 4.1.5 Challenges and proposed solutions
  • 4.1.6 Novelty and advantage over prior art
  • 4.2 REB protocol
  • 4.2.1 System model
  • 4.2.2 Protocol description
  • 4.2.3 Functional estimator
  • 4.2.4 Variance of estimator
  • 4.2.5 Refined estimation with k frames
  • 4.3 Parameter optimization
  • 4.3.1 Minimizing time cost
  • 4.3.1.1 Optimizing p
  • 4.3.1.2 Optimizing f
  • 4.3.2 Minimizing energy cost
  • 4.3.2.1 Optimizing f
  • 4.3.2.2 Optimizing p
  • 4.3.3 Trade-off between time cost and energy cost
  • 4.3.4 Dynamic parameter optimization
  • 4.3.5 Avoiding premature termination
  • 4.4 Performance evaluation
  • 4.4.1 Verifying the convergence of f and p
  • 4.4.2 Evaluating the actual reliability
  • 4.4.3 Evaluating the time efficiency
  • 4.4.3.1 Impact of tag cardinality
  • 4.4.3.2 Impact of tag ratio
  • 4.4.4 Evaluating the energy efficiency
  • 4.4.4.1 Impact of tag cardinality
  • 4.4.4.2 Impact of tag ratio
  • 4.4.5 Performance with constraints on time/energy cost
  • 4.5 Related work
  • 4.6 Conclusion

Inspec keywords: radiofrequency identification; data protection; telecommunication security; estimation theory

Other keywords: commodity EPC C1G2 standard; REB; energy cost; privacy protection; unbiased functional estimator; off-the-shelf RFID tags; RFID estimation scheme with blocker tags; product stock monitoring; time cost minimization

Subjects: Other topics in statistics; RFID systems

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