DenseNet-based RFID Grouping Protocols

The grouping protocol in RFID systems is to label tags according to a given partition so that tags in the identical group hold the same group ID, which makes multi-cast transmissions or aggregate queries possible and thereby improves time efficiency. Existing grouping protocols need to inform each tag individually or each group by transmitting extra filter vectors, which suffer degraded performance. In this paper, we propose a DenseNet-based grouping protocol that labels tags concurrently. The basic idea is to treat the grouping problem as a classification task. The partition information known by an RFID reader is used to train data and obtain a classifier, of which parameters can be broadcast to all tags simultaneously. Each tag can calculate its own group ID according to the parameters. Experimental results demonstrate that our grouping protocol can reduce the execution time by 53% in a real-world RFID system with about 100,000 tags, compared with the state-of-the-art.