Paper Info
Title
DDC: A Novel Scheme to Directly Decode the Collisions in UHF RFID Systems
Abstract
RFID has been gaining popularity due to its variety of applications, such as inventory control and localization. One important issue in RFID system is tag identification. In RFID systems, the tag randomly selects a slot to send a Random Number (RN) packet to contend for identification. Collision happens when multiple tags select the same slot, which makes the RN packet undecodable and thus reduces the channel utilization. In this paper, we redesign the RN pattern to make the collided RNs decodable. By leveraging the collision slots, the system performance can be dramatically enhanced. This novel scheme is called DDC, which is able to directly decode the collisions without exact knowledge of collided RNs. In the DDC scheme, we modify the RN generator in RFID tag and add a collision decoding scheme for RFID reader. We implement DDC in GNU Radio and USRP2 based testbed to verify its feasibility. Both theoretical analysis and testbed experiment show that DDC achieves 40 percent tag read rate gain compared with traditional RFID protocol.
Year
DOI
Venue
2012
10.1109/TPDS.2011.116
IEEE Trans. Parallel Distrib. Syst.
Keywords
Field
DocType
rfid reader,ddc scheme,rn generator,multiple tag,rn pattern,uhf rfid systems,rn packet undecodable,percent tag,rfid tag,novel scheme,directly decode,rfid system,traditional rfid protocol,throughput,protocols,system performance,inventory control,algorithm design and analysis,radiofrequency,algorithm design,decoding,estimation
Algorithm design,Computer science,Network packet,Communication channel,Testbed,Computer network,Real-time computing,Collision,Decoding methods,Throughput,Ultra high frequency
Journal
Volume
Issue
ISSN
23
2
1045-9219
Citations 
PageRank 
References 
15
0.79
11
Authors
5
Name
Order
Citations
PageRank
Lei Kang1323.95
kaishun wu2105994.59
Jin Zhang370839.68
haoyu tan432618.31
Lionel M. Ni59462802.67