Grouping Strategy for Solving Hidden Node Problem in IEEE 802.15.4 LR-WPAN
WICON '05 Proceedings of the First International Conference on Wireless Internet
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
Solvability of a Markovian Model of an IEEE 802.11 LAN under a Backoff Attack
MASCOTS '05 Proceedings of the 13th IEEE International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems
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
Redundancy and coverage detection in sensor networks
ACM Transactions on Sensor Networks (TOSN)
Performance-effective and low-complexity redundant reader detection in wireless RFID networks
EURASIP Journal on Wireless Communications and Networking - Intelligent Systems for Future Generation Wireless Networks
Information Systems Frontiers
Computer Standards & Interfaces
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With the emergence of wireless RFID technologies, the problem of scheduling transmissions in dynamic RFID systems has been arousing attention. In recent year, it has also instigated researches to propose different heuristic algorithms for scheduling transactions between RFID readers and tags. In this paper, we present a two phase dynamic modulation (TPDM) technique, which consists of regional scheduling and hidden terminal scheduling phases, aims to efficiently perform communications between readers and tags in high density and mobile RFID networks. TPDM is a simple mechanism for coordinating simultaneous transmissions among multiple readers and hidden terminals. A significant improvement of this approach is that TPDM can prevent reader collisions by using a distributed self-scheduling scheme. An advantage of the proposed technique is that TPDM is adaptive in both static and dynamic RFID environments. To evaluate the performance of the proposed technique, we have implemented the TPDM scheme along with the Colorwave and Pulse protocols. The experimental results show that the TPDM scheduling techniques provide superior and stable performance in both static and dynamic circumstance, especially in mobile and high density RFID environments. The TPDM is shown to be effective in terms of throughput, system efficiency, and easy to implement.