CAJ | 학술논문

动态帧时隙 ALOHA（DFSA）算法是一种应用广泛的防碰撞技术，主要用于解决超高频（UHF）射频识别系统（RFID）中的标签碰撞问题。在 DFSA 算法中，读写器需要准确估计剩余标签数并设定一个新的帧长度来识别这些标签。因此，碰撞检测（CD）和标签剩余数估计在 DFSA 中起着关键性的作用。现有的碰撞检测方法并不能足够有效的用于检测碰撞并导致识别性能的下降。为了减少计算量和提高识别性能，本文提出了一种有效的防碰撞算法，该算法结合了碰撞检测和待识别标签数估计方法，使得性能更加高效。理论分析和仿真结果表明，该算法的性能要优于现有的同类算法，这非常有助于设计一种快速而高效的读写器。
동태정시극 ALOHA（DFSA）산법시일충응용엄범적방팽당기술，주요용우해결초고빈（UHF）사빈식별계통（RFID）중적표첨팽당문제。재 DFSA 산법중，독사기수요준학고계잉여표첨수병설정일개신적정장도래식별저사표첨。인차，팽당검측（CD）화표첨잉여수고계재 DFSA 중기착관건성적작용。현유적팽당검측방법병불능족구유효적용우검측팽당병도치식별성능적하강。위료감소계산량화제고식별성능，본문제출료일충유효적방팽당산법，해산법결합료팽당검측화대식별표첨수고계방법，사득성능경가고효。이론분석화방진결과표명，해산법적성능요우우현유적동류산법，저비상유조우설계일충쾌속이고효적독사기。
Dynamic frame slotted ALOHA (DFSA)is a popular anti-collision technique to resolve a tag collision problem in ultrahigh-frequency (UHF)radio-frequency identification (RFID)systems.In DFSA,the reader needs to accurately estimate tag backlog and set a new frame size for identifying the backlog.Thus,collision detection (CD)and tag backlog estimation play impor-tant roles in DFSA.Existing CD schemes do not respond efficiently enough to detect a collision and result in a degradation of identi-fication performance.To reduce computation load and improve identification performance,a feasible anti-collision algorithm that combines collision detection and tag backlog estimation is designed to make the performance more efficient.Theoretical analysis and simulation results show that the performance of the proposed algorithm is better than most existing anti-collision solutions.The re-sults obtained were useful for the design of fast,efficient readers.