In this paper we discuss how to reduce identification time with a given number of tags in the field of an RFID reader. This paper proposes three methods for fast tag identification: bi-slotted tree based RFID tag anti-collision protocols, query tree based reservation, and the combining method of them. Theses proposed methods can be used for enhancing the identification speed of RFID systems.

AN RFID BASED UBIQUITOUS FRAMEWORK FOR MOBILE OBJECT TRACKING

Abstract Due to their limitless possibilities and low cost, RFID systems are powerful object identi cation tools well-suited in everyday applications. When attempting to identify multiple RFID tags from densely populated elds within the shortest timeframe possible, the typical design characteristics of RFID systems lead to a problematic lack of adequate resources to e ciently do so. After a bri...

In this paper, RFID as a brand-new pervasive computing technology is to be studied and discussed. In particular, its security threats are the main problems that should be found through literature review. Possible solutions towards these problems are to presented.

あらまし 近年,RFID(Radio Frequency IDentification)システムは,個人認証や物流管理などに利用さ れるなど,普及が進んでいる.読取り対象となる RFIDタグには様々な形状のものが存在し,用途に適したもの が選択される.その一例として,リストバンド型のタグを用いた個人認証が挙げられる.しかしながら,リスト バンド型のように人体に装着して RFID タグを用いる場合には,人体の誘電性によりアンテナ特性が変化する. そこで本論文では,リストバンド型 RFID用アンテナの特性解析を数値解析及び生体等価ファントムを用いた実 験によって行い,人体がアンテナ諸特性に与える影響を評価した.更に,アンテナに反射素子を装荷することに よる利得改善の検討を行った.以上の結果より,人体がアンテナ諸特性に影響を与えることを確認し,また,反 射素子の装荷により放射特性の改善が可...

Signatures We confirm that the above candidate presented a seminar on [ ] in the Department on the subject of this research proposal and we recommend that the proposal be approved