Adaptive Power Control Protocol with Hardware Implementation for Wireless Sensor and RFID Reader NetworksIEEE Systems Journal
AbstractThe development and deployment of radio frequency identification (RFID) systems render a novel distributed sensor network which enhances visibility into manufacturing processes. In RFID systems, the detection range and read rates will suffer from interference among high-power reading devices. This problem grows severely and degrades system performance in dense RFID networks. Consequently, medium access protocols (MAC) protocols are needed for such networks to assess and provide access to the channel so that tags can be read accurately. In this paper, we investigate a suite of feasible power control schemes to ensure overall coverage area of the system while maintaining a desired read rate. The power control scheme and MAC protocol dynamically adjust the RFID reader power output in response to the interference level seen during tag reading and acceptable signal-to-noise ratio (SNR). We present novel distributed adaptive power control (DAPC) as a possible solution. A suitable back off scheme is also added with DAPC to improve coverage. A generic UHF wireless testbed is built using UMR/SLU GEN4-SSN for implementing the protocol. Both the methodology and hardware implementation of the schemes are presented, compared, and discussed. The results of hardware implementation illustrate that the protocol performs satisfactorily as expected.
Department(s)Electrical and Computer Engineering
Second DepartmentComputer Science
Keywords and Phrases
- Coverage Optimization,
- Distributed Power Control,
- Frequency Interference,
- Radio Frequency Identification (RFID),
- Reader Collision,
- Sensor Networks
Document TypeArticle - Journal
Document VersionFinal Version
Rights© 2007 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
Citation InformationKainan Cha, Jagannathan Sarangapani and David Pommerenke. "Adaptive Power Control Protocol with Hardware Implementation for Wireless Sensor and RFID Reader Networks" IEEE Systems Journal (2007)
Available at: http://works.bepress.com/david-pommerenke/29/