In-network RFID data filtering scheme in RFID-WSN for RFID applications

Abstract

In the integration of wireless sensor networks (WSN) and radio frequency identification (RFID), RFID data can use WSN protocols for multi-hop communication. Due to readers overlapped regions in dense areas and due to readers multiple read cycles, a lot of duplicate data is produced. Transmitting such duplicates towards base station waste node energies. In-network filtering of these duplicates can save transmission overhead, but on the other hand it increases computation cost. Delay is an important parameter in RFID applications that has not been considered yet by existing approaches. Both communication overhead and computation overhead can affect the delay performance in terms of queuing delay and processing delay respectively. Therefore, it is required to tune the filtering algorithm. In this paper, our in-network filtering scheme tend to find this trade-off between these two costs for better delay performance. In simulation part, we showed the effect of these costs on delay performance. © 2013 Springer-Verlag Berlin Heidelberg.