Array‐based reader anti‐collision scheme for highly efficient RFID network applications

Abstract

Radio frequency identification (RFID) is a technology for identifying objects by radio signal. The reader collision problem is caused by the interrogation zones overlap of multiple readers, and leading to incorrect and unreliable data. This study proposes an array‐based reader anti‐collision scheme (ARCS) for solving the reader‐to‐tag interference problem. This mechanism uses array and grouping techniques to schedule the active readers to reduce the read cycle (RC) time. The ‘RC’ and ‘collision ratio (CR)’ measures serve as performance indexes in the proposed scheme. From ‘RC’ comparison, the ARCS mechanism has the maximum improvement of 55 per cent as compared with the existing mechanisms. Furthermore, take ‘CR’ index, ARCS has the maximum improvement of 42 per cent as compared to the others. Copyright © 2008 John Wiley & Sons, Ltd.

A comparative study of RFID schedulers in dense reader environments

“…-Switch-off interfering readers: [5] -Based on TDMA: [4][7] [13] -Based on FDMA: [15] -Regulations: [1] -Standards: [2] These proposals have been implemented and simulated in the scenario depicted in Fig. 3, taking the parameters of Table 2.…”

“…In [4], the readers are allocated in only one channel. The centralized mechanism detects overlapping reading areas in real-time, and may disconnect some reader to reduce the RTI.…”

“…On the other hand, a number of papers [3][4][5][6][7][8] deal with minimization of the RTI, but without considering reader-toreader ones. Besides, most of the proposals require extra hardware, do not make an efficient use of the time/frequency resources, and even some of them are incompatible with the current standards.…”

Load-balancing mechanism for the RFID middleware applications over grid networking

“…The RFID technology and reader performance have been improved significantly. Moreover, many mechanisms have been presented to solve the collision problem, significantly increasing the amount of data handled by readers, and potentially overloading the RFID middleware (Chen et al, 2009;Li, 2006;Christian et al, 2007). Load-balancing mechanisms for RFID middleware have been proposed to solve the problem of overloading.…”

Optimal Scheduling in Single Channel Dense Reader RFID Environments

“…In [6] readers share a unique frequency and a centralized server applies a TDMA technique to coordinate the readers, controlling, in real-time, the overlapping areas of the reader-to-tag read ranges and deciding if to disconnect the interfering readers to reduce reader-to-tag collisions. This scheme cannot be applied to those scenarios which do not admit to switch off readers.…”