An MAC Protocol for Wireless Ad-hoc Networks Using Smart Antennas
ICPADS '05 Proceedings of the 11th International Conference on Parallel and Distributed Systems - Volume 01
HiQ: A Hierarchical Q-Learning Algorithm to Solve the Reader Collision Problem
SAINT-W '06 Proceedings of the International Symposium on Applications on Internet Workshops
Collision avoidance in a dense RFID network
WiNTECH '06 Proceedings of the 1st international workshop on Wireless network testbeds, experimental evaluation & characterization
Dynamic tag estimation for optimizing tree slotted aloha in RFID networks
Proceedings of the 11th international symposium on Modeling, analysis and simulation of wireless and mobile systems
A Priority Based Transaction mechanism towards high reliable RFID services
International Journal of Ad Hoc and Ubiquitous Computing
E2MAC: An energy efficient MAC for RFID-enhanced wireless sensor networks
Pervasive and Mobile Computing
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With the emergence of wireless technologies, RFID is increasingly used in many applications such as inventory management, object tracking, retail checkout etc. In an RFID system, readers are centered in a finite area within which they can communicate with tags. Because the same radio frequency is used for communication, readers may also interfere with the operations of other readers even if their interrogation zones do not overlap. Thus the problem of scheduling multiple readers to tags transmissions in dynamic systems has been arousing attention. This paper presents a priority based transaction method to coordinate simultaneous communications among multiple readers in order to increase the overall read rate in dynamic RFID systems. Through a contention-free scheduling, the reader-tag transmissions can be performed without collisions even the environment has hidden terminal. To evaluate the effectiveness of the proposed techniques, both network density and mobility of readers' join and leave are conducted in the tests. Experimental results show that the proposed techniques provide superior system throughput in both static and dynamic circumstances.