Load Balancing in Large-Scale RFID Systems

Q. Dong, A. Shukla, V. Shrivastava, D. Agrawal, S. Banerjee, K. Kar
2007 IEEE INFOCOM 2007 - 26th IEEE International Conference on Computer Communications  
A radio frequency identifier (RFID) system consists of inexpensive, uniquely-identifiable tags that are mounted on physical objects, and readers that track these tags (and hence these physical objects) through RF communication. In this paper we, therefore, address this load balancing problem for readers -given a set of tags that are within range of each reader, which of these tags should each reader be responsible for such that the cost for monitoring tags across the different readers is
more » ... d, while guaranteeing that each tag is monitored by at least one reader. We show that a generalized variant of the load balancing problem is NP-hard and hence present a 2approximation centralized algorithm. We next present an optimal centralized solution for a specialized variant. Subsequently, we present a localized distributed algorithm that is probabilistic in nature and closely matches the performance of the centralized algorithms. Our results demonstrate that our schemes achieve very good performance even in highly dynamic large-scale RFID systems.
doi:10.1109/infcom.2007.265 dblp:conf/infocom/DongSSABK07 fatcat:v4p4d3u7dbffvewvobmapni7cy