A radio frequency identification (RFID) reader will fail to identify tags if a collision occurs. This
paper proposes a bi-slotted binary tree algorithm (BSBTA) with stack for RFID tag anti-collision to improve the
performance of binary tree algorithm (BTA). In BSBTA, the reader detects collisions by Manchester code and
stores colliding prefixes in a stack. The query is composed of a two-bit prefix and an index value. Following every
reader query, there are two timeslots for tags whose pointers and identities (IDs) match the query to respond,
one for the tag whose next bit is 0 and the other for the tag with 1 as its next bit. Performance analysis and
evaluation are also given. The time complexity and the communication complexity of BTA and BSBTA are
derived. The simulation results compare the performance of BSBTA with several related anti-collision algorithms.
It is shown that BSBTA outperforms BTA in terms of the average number of responded bits and timeslots for one
tag identification.
TIAN Yuna* (田芸), CHEN Gong-lianga (陈恭亮), LI Jian-huaa,b (李建华)
. Bi-slotted Binary Tree Algorithm with Stack for Radio Frequency Identification Tag Anti-Collision[J]. Journal of Shanghai Jiaotong University(Science), 2013
, 18(2)
: 173
-179
.
DOI: 10.1007/s12204-013-1380-7
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