A Dynamic Framed Slotted ALOHA Algorithm Using Collision Factor for RFID Identification

Seung Sik CHOI  Sangkyung KIM 

Publication
IEICE TRANSACTIONS on Communications  Vol.E92-B  No.3  pp.1023-1026
Publication Date: 2009/03/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Network
Keyword: 
RFID,  collision resolution,  dynamic frame ALOHA,  tag estimation, 

Full Text: PDF(141.9KB)

Summary: 
In RFID systems, collision resolution is a significant issue in fast tag identification. This letter presents a dynamic frame-slotted ALOHA algorithm that uses a collision factor (DFSA-CF). This method enables fast tag identification by estimating the next frame size with the collision factor in the current frame. Simulation results show that the proposed method reduces slot times Required for RFID identification. When the number of tags is larger than the frame size, the efficiency of the proposed method is greater than those of conventional algorithms.