Radio Frequency Identification (RFID) usually incorporates a tag into an object for the purpose of identification or localization using radio signals. It has gained a lot of attention recently due to its advantages in terms of low cost and easy deployment. This article presents an overview of RFID-based localization and tracking technologies, including transmitter-based (e.g., LANDMARC), receiver-based (e.g., Reverse RFID), transceiver-free (e.g., tag-free) and some hybrid approaches. These technologies mainly use the readily available resource of Radio Signal Strength (RSS) information or RSS change information to localize the target objects. A number of well known approaches and their limitations are introduced. This article also indicates the challenges and possible solutions in the near and long terms. The challenges include multipath, interference and localizing multiple objects. These challenges are not only for RFID-based localization, but also for all the Radio Frequency (RF) based localization technologies.
Citation: IEEE Wireless Communications
Pub Type: Journals
RFID, localization, tracking