Delay/Disruption-Tolerant Mobile RFID Networks: System Modeling,Protocol Design,and Experimental Evaluation.
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文摘
This work focuses on the use of RFID gear for wireless sensor network construction, aiming to find events of interest and gather aggregate information, maximize the usage of valuable data channel and reduce the unnecessary data transmission. In particular, I develop a Featherlight Information Network with Delay-Endurable RFID Support FINDERS), composed of passive RFID tags which are ultra light, durable, and flexible, without power supply for long-lasting applications. FINDERS faces unprecedented challenges in communication and networking, due to its sporadic wireless links, unique asymmetric communication paradigm, intermittent computation capability, and extremely small memory of tags. I first create a general framework to facilitate data collection in FINDERS, then use the analytical model to show its feasibility, after that the data delivery scheme is implemented in our RFID prototype with Alien RFID gears. I have carried out experiments with 38 participants for 9 days and gained meaningful insights of the system. Besides the general framework, I have studied the problem of rostering under such a platform and further extended the rostering problem to a more general problem- Distributed Data Query, I propose a distributed data query framework that clusters RFID readers and establishes a 0-1 Knapsack model based on dynamic packet appraisal to enable highly efficient data transmission. I implement a prototype by using Alien RFID gears and carry out experiments that involve 52 volunteers for 14 days to evaluate the proposed data query framework.