《物联网技术导论》课程教学资源（PPT讲稿）Continuous Scanning with Mobile Reader in RFID Systems - an Experimental Study

Continuous Scanning with Mobile Reader in RFID Systems: an Experimental Study Author: Lei Xie, Qun Li, Xi Chen, Sanglu Lu, Daoxu Chen Presenter: Dr. Lei xie Associate Professor, Nanjing University, China Xie@nju.edu.cn

Continuous Scanning with Mobile Reader in RFID Systems: an Experimental Study Author：Lei Xie, Qun Li, Xi Chen, Sanglu Lu, Daoxu Chen Presenter：Dr. Lei Xie Associate Professor，Nanjing University, China lxie@nju.edu.cn

Outline Background and motivation Problem formulation Studies from Realistic Experiments Continuous Scanning with Mobile reader Performance evaluation Conclusion

Background and Motivation Outline Problem Formulation Studies from Realistic Experiments Continuous Scanning with Mobile Reader Performance Evaluation Conclusion

Background and motivation Identify Tags in Passive RFID System RFID Reader PC )( Passive RFID continuous RFID Tag Antenna backscatter wave

Background and Motivation • Identify Tags in Passive RFID System PC Passive RFID Tag RFID Reader RFID Antenna continuous wave backscatter

Background and Motivation Application scenarios How to scan books in a library or a bookstore?

Background and Motivation • Application scenarios – How to scan books in a library or a bookstore？

Background and Motivation Application scenarios How to make an inventory of merchandises in a store? 要签

Background and Motivation • Application scenarios – How to make an inventory of merchandises in a store?

Background and Motivation These requirements are very common for RFID-based appl Plications Solutions Solution 1: Scan the tags with a fixed reader Solution 2: Continuously scan the tags with a mobile reader

Background and Motivation • These requirements are very common for RFID-based applications. • Solutions – Solution 1: Scan the tags with a fixed reader. – Solution 2: Continuously scan the tags with a mobile reader

Background and motivation Solution 1: Scan the tags with a fixed reader Evaluation: Limited scanning range even with the maximum power lot

Background and Motivation Solution 1: Scan the tags with a fixed reader. Evaluation: Limited scanning range even with the maximum power

Background and motivation Solution 2: Continuously scan the tags with a mobile reader Evaluation: the right way for efficient tag identification. effectively compensating for its limited reading range

Background and Motivation Solution 2: Continuously scan the tags with a mobile reader Evaluation: the right way for efficient tag identification, effectively compensating for its limited reading range

Background and Motivation Challenges for Continuous Scanning with Mobile reader No realistic model to characterize the performance for mobile RFId reading in a large scale setting The factors that affect the mobile reading per formance are very complicated Readers power Tag density

Background and Motivation • Challenges for Continuous Scanning with Mobile Reader – No realistic model to characterize the performance for mobile RFID reading in a large scale setting. – The factors that affect the mobile reading performance are very complicated. • Reader’s power, • Tag density. • …

Background and Motivation · Previous studies: experiments in a small scale (< 20 tags) reading performance in a close to free space scenario didn,'t consider important factors(e.g, reader power, tag density) Previous work does not give a model for RFID reading process in a realistic and large scale setting it does not include the power and tag density

Background and Motivation • Previous studies: – experiments in a small scale (< 20 tags). – reading performance in a close to free space scenario. – didn't consider important factors (e.g., reader power, tag density) • Previous work does not give a model for RFID reading process in a realistic and large scale setting – it does not include the power and tag density