25-04-2010, 09:25 PM
A Multicast Anti-Collision Protocol for FTDMA based RFID system
Abstract:
RFID (radio frequency identification) is a key technology supporting emerging solutions for the automation of the identification service and the mass product management. A key issue is to reduce the average time taken to identifying tags, which is called average identification time. Focusing on the issue, the paper proposes an efficient multicast protocol which is applied to the anti-collision protocol of FTDMA (frequency time deivision multiple access) based RFID system. Thanks to the compactness of a multicast protocol, simulation result shows 29.5% improvement of average identification time.
Presented By:
Sung-Rok Yoon, and Sin-Chong Park
Information and Communications University
119, Munji-ro, Yuseong-gu, Daejeon, Korea
1. Introduction
Radio frequency identification (RFID) technology has been grown for a decade, along with the development of semiconductor technology. It is applied for many industrial fields such as the distribution industry, the inventory management, the medical treatment, and so on. By attaching a RFID tag to every product, the technology will contribute the establishment of the Ubiquitous environment. An important issue of RFID is the technology to accelerate the time identifying many tags. In order to do that, the collision between multiple tags should be efficiently compromised. This function is called anti-collision protocol. Anti-collision protocol is to be classified into the ALOHA-based (or probabilistic) protocols and the tree- based (or deterministic) schemes, in terms of the method to obtain the opportunity accessing the channel. At the ALOHA-based protocols, tags access the channel by random priority. There are pure ALOHA, slotted-ALOHA, and frame-slotted-ALOHA protocols [1]. For the tree-based protocols, tags which satisfy the condition given by a reader try to access the channel. The tree-based schemes guarantee that every tag replies once during the identification time. For another point of view, the anti-collision protocols are categorized into TDMA (time division multiple access) and FDMA (frequency division multiple access). There is a hybrid scheme called FTDMA (frequency time division multiple access) as well.
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http://ieiceproceedings/ITC-CSCC2008/pdf/p509_B5-2.pdf
