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Improved Received Signal Strength Ratio Based High Accuracy Indoor Visible Light Positioning Scheme
Zhijie Luo,JinHua Wang,WenWen Zhao,JianKun Luo,WeiNan Zhang,GuoFu Zhou 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.12
With the increasingly development of Light-emitting Diode (LED) lighting, in this paper, we proposed an Indoor Visible Light Positioning (VLP) Scheme by using visible LED lights for accurate localization. The basic idea of the position scheme is to improve received signal strength ratio algorithm. Received signal strength ratio (RSSR) is the relative ratio of optical powers detected between each LED and optical receiver. In this paper, we introduce concept of multiple LEDs selection to improve RSSR positioning algorithm. By three LEDs are reasonably selected from the multiple LEDs deployed in the room, the positioning accuracy of RSSR is improved. The system can be employed easily because it does not require additional sensors and occlusion problem in visible light would be alleviated. In addition, we performed the simulation experiments, and confirmed the feasibility of our proposed method.
A Novel Control Method for Shallow Underwater Robot
Zhijie Tang,Pinglong Liu,Qian Luo,Jun Luo,Shaorong Xie 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.3
For the coordination and control of robot behavior, behavior decision is the foundation and the determinant of robot intelligence. Based on autonomous underwater vehicle (AUV), through the analysis of domestic anti-surge technology research status and inrush current model, a control technology with the use of behavioural decision upper and lower piecewise integration control between PID and FPID(Fuzzy PID) is designed. Then, according to the characteristics of underwater robotics and inrush current optimal path planning, AUV can get information and plan a different anti-surge behavioural decision, which makes underwater robot better complete the underwater operations. Finally, the simulation of anti-surge behaviour underwater robot is done. The results show that it achieves a good control performance, and the environmental adaptability of AUV has been improved.
A Common Data Storage Solution for SE-based Membership Card Applications
Jianchao Luo,Zhijie Qiu 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.3
In order to encourage customers to return, more and more retailers issue membership cards that offer certain exclusive benefits to the customers who own them. As it is not convenient for the customers to bring many plastic membership cards with them, electronic membership cards emerge. However, traditional electronic membership cards are stored in the mobile phone that usually lacks enough security protection. This paper presents a common data storage solution for SE-based membership card applications, which can enable retailers not only to deploy membership cards on secure area easily, but also to access membership cards in a fast and secure manner. Since the proposed solution provides common and simplified interfaces for managing membership card application information, the service providers will not have to know much about the complicated application management mechanism within a SE and thus the overhead of developing and deploying a SE-based membership card application is greatly reduced.
A Secure NFC-based Electronic Voucher Solution
Jianchao Luo,Zhijie Qiu 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.4
As the number of mobile Internet users grows rapidly, more and more service providers are distributing electronic vouchers to consumers via mobile phones, which eliminates the need to carry various plastic or paper-based vouchers. Currently, electronic vouchers are available mainly in the form of text message or QR code. However, these types of vouchers are usually stored in the mobile phone that lacks secure storage and trusted execution environment. In addition, it is not efficient enough to input voucher code manually or get voucher QR code scanned when the consumer redeems the voucher. Near Field Communication (NFC) is a short-range wireless communication technology that simplifies the way of interaction between the electronic devices and guarantees a fast and secure information exchange. In this paper, we propose an NFC-based electronic voucher solution, which provides capabilities of distributing, managing and redeeming vouchers in a secure manner. The security of the voucher is ensured by storing it in the Secure Element (SE). With the proposed system, the consumer is enabled to redeem the voucher just by touching the NFC reader at the point of sale with his/her NFC phone, which offers better user experience than traditional electronic voucher solutions.
A Framework for Secure NFC Applications
Jianchao Luo,Zhijie Qiu 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.3
Near Field Communication (NFC) technology provides a more natural and intuitive way for users to interact with intelligent environments within close proximity. It can be used in many scenarios including ticketing, advertising, controlled access, etc. However, NFC applications, especially those installed to the Secure Element (SE) for secure usage, have not yet been deployed widely enough in commercial environment. One reason is that the market is emerging and NFC-enabled smartphones are still very limited. Another reason is the life-cycle management of NFC applications on the SE is very complicated for application providers since the NFC business ecosystems have not yet taken off. In this paper, in order to establish a secure operating environment for third-party NFC applications, we propose a trusted NFC application management framework, which provides secure application provisioning and life-cycle management services. With the framework, NFC smartphone users can find and download interested NFC applications easily, and application providers can deploy NFC applications on users' SEs in a simple but secure way.
Discussion and Design of Dynamic Liquid Level Intelligent Monitoring System
Guangdong Qiu,Zhijie Luo,Guofu Zhou 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.11
The problem of how to calculate the height of the liquid level under tilting status is considered. A custom algorithm for obtaining the real height of liquid level according to the difference of distance measured by ultrasonic sensors is proposed. A set of intelligent monitoring system is designed as well. The system, which takes S3C6410 processor as the control core of the front-end system, measures distance by multiple HC-SR04 ultrasonic sensors, compensates temperature via external temperature sensor ds1820, collects data via inserting driver modules, and then gets the liquid level angle by means of the difference between distance, to calculate the liquid level height, both of which will be sent via Bluetooth chip CC2541 and wireless network. The data, received by PC, will be used for graphical interface display and speech broadcasting depending on Processing software programming. The smart phone can also read data and control devices from the front-end. The results of simulation experiment of this system are considered.