A maximum likelihood-based distributed protocol for passive RFID dense reader environments
The Journal of Supercomputing
Enhancement of Redundant Reader Elimination by Using Hybrid Algorithm in RFID Systems
Wireless Personal Communications: An International Journal
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Concurrent access among multiple mobile readers brings about a new problem called reader collision that a reader’s transmission is interfered by the others. There have been several works to solve the reader collision problem. While they employ time division, frequency division, space division, or centralized scheduling approach, in this paper, we introduce a cooperative, distributed reader collision avoidance algorithm. In particular, it is suitable for energy-efficient wireless mobile network environment cooperated with RFID, since the proposed DiCa (Distributed Tag Access with Collision-Avoidance) is capable of not only avoiding collisions but also changing power state autonomously through only distributed simple interactions between adjacent readers.