Come and Be Served: Parallel Decoding for COTS RFID Tags

6 years 5 months ago
Come and Be Served: Parallel Decoding for COTS RFID Tags
Current commodity RFID systems incur high communication overhead due to severe tag-to-tag collisions. Although some recent works have been proposed to support parallel decoding for concurrent tag transmissions, they require accurate channel measurements, tight tag synchronization, or modiļ¬cations to standard RFID tag operations. In this paper, we present BiGroup, a novel RFID communication paradigm that allows the reader to decode the collision from multiple COTS (commodity-off-the-shelf) RFID tags in one communication round. In BiGroup, COTS tags can directly join ongoing communication sessions and get decoded in parallel. The collision resolution intelligence is solely put at the reader side. To this end, BiGroup examines the tag collisions at RFID physical layer from constellation domain as well as time domain, exploits the under-utilized channel capacity due to low tag transmission rate, and leverages tag diversities. We implement BiGroup with USRP N210 software radio that is ab...
Jiajue Ou, Mo Li, Yuanqing Zheng
Added 14 Apr 2016
Updated 14 Apr 2016
Type Journal
Year 2015
Authors Jiajue Ou, Mo Li, Yuanqing Zheng
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