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An Enhanced RFID Multiple Access Protocol for Fast Inventory

Summary: An Enhanced RFID Multiple Access Protocol
for Fast Inventory
You-Chang Ko, Sumit Roy Joshua R. Smith Hyung-Woo Lee, Choong-Ho Cho
Univ. of Washington Intel Research Korea Univ.
{ycko,sroy}@u.washington.edu joshua.r.smith@intel.com {hwlee,chcho}@.korea.ac.kr
Abstract - The relevant performance metric for successful
deployment of Radio Frequency Identification (RFID)
systems for tag inventory applications is the latency for
reading all tags with (high) reliability. Tag collisions in
response to a reader query increase the read latency of
the MAC protocol; the mean latency can be considerably
improved by a combination of techniques including more
efficient anti-collision approaches as well as via estimation
of the number of backlogged tags. We propose a novel
anti-collision algorithm: breadth-first-search with m-ary
splitting (BMSA) within a TDMA frame structure. A
simple backlogged tag estimation algorithm is used in
conjunction with the above to dynamically set the
splitting factor (SF) m. Simulation results demonstrate the
superiority of the proposed scheme over existing methods


Source: Anderson, Richard - Department of Computer Science and Engineering, University of Washington at Seattle


Collections: Computer Technologies and Information Sciences