Abstract
Radio frequency identification (RFID) tags are small electronic devices working in the radio frequency range. They use wireless radio communications to automatically identify objects or people without the need for line-of-sight or contact, and are widely used in inventory tracking, object location, environmental monitoring. This paper presents a design of a covert RFID tag network for target discovery and target information routing. In the design, a static or very slowly moving target in the field of RFID tags transmits a distinct pseudo-noise signal, and the RFID tags in the network collect the target information and route it to the command center. A map of each RFID tag’s location is saved at command center, which can determine where a RFID tag is located based on each RFID tag’s ID. We propose the target information collection method with target association and clustering, and we also propose the information routing algorithm within the RFID tag network. The design and operation of the proposed algorithms are illustrated through examples. Simulation results demonstrate the effectiveness of the design.
Highlights
Radio frequency identification (RFID) tags are small electronic devices working in the radio frequency (RF) range
This paper explores the applications of active RFID tags in target identification in the RFID tag network using a pseudo-noise signal, where a static or slowly moving target out of the range of the command center transmits a distinct pseudo-noise signal within the field of the spatially distributed RFID tags
The routing path from RFID tag cluster head to the command center in the RFID tag network we propose is based on the joint optimization of channel quality and path length
Summary
RFID tags are small electronic devices working in the radio frequency (RF) range. They use wireless radio communications to automatically identify objects or people without the need for Sensors 2011, 11 line-of-sight or contact, and have the advantage that they can be read through a variety of visually and environmentally challenging conditions. Clusters are formed by RFID tags associated with the same target One of these RFID tags, selected as the head of the RFID tag cluster, routes the target’s information out to the command center. The routing path in the RFID tag network from cluster head RFID tag to the command center is selected according to the channel condition, which is a joint optimization of favorable channel conditions and short path length. We present an algorithm design in the physical layer on target information collection and routing within the RFID tag network in outdoor scenarios, specify the signal format, signal modulation, and signal detection method. The routing path from RFID tag cluster head to the command center in the RFID tag network we propose is based on the joint optimization of channel quality and path length.
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