Geographical Correlation-Based Data Collection for Sensor-Augmented RFID Systems
Geographical Correlation-Based Data Collection for Sensor-Augmented RFID Systems
复制标题
传感器增强 RFID 系统基于地理相关性的数据收集
DOI:
10.1109/tmc.2019.2923413
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发表时间:
2020-10
影响因子:
7.9
通讯作者:
Jie Wu
中科院分区:
文献类型:
--
作者:
Xin Xie;Xiulong Liu;Heng Qi;Bin Xiao;Keqiu Li;Jie Wu
This paper studies the practically important problem of data collection for sensor-augmented RFID systems. However, existing RFID data collection protocols suffer from two common limitations: execution time is naturally in proportion to the number of tags, thus they cannot satisfy time-stringent application scenarios; none of them is complaint with the C1G2 standard, thus they cannot be implemented using Commercial-Off-The-Shelf (COTS) RFID tags. To overcome these two limitations, this paper proposes the <underline>G</underline>eographical correlation-based <underline>R</underline>F-data <underline>C</underline>ollection (GRC) protocol. GRC is fast because it is able to approximately capture the sensing data of all tags by only actually gathering data from a small set of sampled tags. This is based on the observation from the real-world data set that sensing data has a strong geographical correlation, i.e., data gathered from nearby RFID tags has similar values. In GRC, we use a greedy approach to find the minimum sampling tag set to cover the whole monitoring region such that each un-sampled tag has at least one sampled tag nearby. Then, RFID reader runs the Framed Slotted Aloha (FSA) protocol specified in C1G2 standard to collect sensing data from the sampled tags. For each un-sampled tag, we approximate its sensing data by calculating weight-average of the data collected from its nearby sampled tags, where a faraway sampled tag should be given a small weight, and vice versa. Compared with existing RFID data collection schemes, the advantages of GRC are two-fold: (1) Extensive simulation results demonstrate that the time cost of our GRC scheme is only <inline-formula><tex-math notation="LaTeX">$1/28{\sim }1/3$</tex-math><alternatives><mml:math><mml:mrow><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:mn>28</mml:mn><mml:mo>∼</mml:mo><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:mn>3</mml:mn></mml:mrow></mml:math><inline-graphic xlink:href="liu-ieq1-2923413.gif"/></alternatives></inline-formula> of the state-of-the-art data collection scheme; (2) GRC is totally complaint with C1G2 standard, thus it can be easily deployed on the COTS RFID tags.
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