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[IEEE 2017 International Conference on Transforming Engineering Education (ICTEE) - Pune, India (2017.12.13-2017.12.16)] 2017 International Conference on Transforming Engineering Education (ICTEE) - A Performance Analysis of “Light Fidelity” and “Internet of Things” & It's Application
摘要： In today's world, various diseases are increasing, with this a doctor's ability to treat such large number of people deteriorates and also the task to monitor them regularly is painstaking. However we can overcome this problem to a certain extend with the help of newly emerged technology of LIFI and IOT. LIFI or Light Fidelity invented by Prof. Harald Hass of University of Edinburgh and IOT proposed by Kevin Ashton, provide us with one such technology using which a doctor can keep record of his/her patient from anywhere across the world. Since doctor has to stay updated with his patient's condition, we need a noninterfering connectivity which is possible by LIFI and this huge data of patient can be recorded and stored using cloud computing IOT. Once the doctor receives the data, he can analyze them and provide appropriate feedback to the person (nurse) who is currently operating the patient.
关键词： Internet of Things (IOT),Light Fidelity (LIFI)
更新于2025-09-23 15:22:29
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Simultaneous Data Transmission using Multilevel LED in Hybrid OCC/LiFi System: Concept and Demonstration
摘要： In this letter, a hybrid-encoding scheme is developed for an integrated optical camera communication (OCC)/light-fidelity (LiFi) system. A single multilevel light-emitting diode (LED) is used for transmitting both OCC and LiFi data. Two data streams are transmitted, where each stream is intended for LiFi and OCC. The first stream is transmitted at a very high frequency using the LED. The LED flickers in two different power levels creating consecutive sequences. A smartphone camera receives the sequences as binary successions, wherein the second data stream is modulated. The modulation is referred to as intensity-shift keying. A testbed prototype is implemented to demonstrate the proof-of-concept, which is also used to show the bit-error-rate performance of the proposed scheme.
关键词： hybrid system,intensity-shift keying (ISK),light-fidelity (LiFi),Optical camera communication (OCC)
更新于2025-09-19 17:13:59
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Modeling the Random Orientation of Mobile Devices: Measurement, Analysis and LiFi Use Case
摘要： Light-fidelity (LiFi) is a networked optical wireless communication (OWC) solution for high-speed indoor connectivity for fixed and mobile optical communications. Unlike conventional radio frequency wireless systems, the OWC channel is not isotropic, meaning that the device orientation affects the channel gain significantly, particularly for mobile users. However, due to the lack of a proper model for device orientation, many studies have assumed that the receiver is vertically upward and fixed. In this paper, a novel model for device orientation based on experimental measurements of forty participants has been proposed. It is shown that the probability density function (PDF) of the polar angle can be modeled either based on a Laplace (for static users) or a Gaussian (for mobile users) distribution. In addition, a closed-form expression is obtained for the PDF of the cosine of the incidence angle based on which the line-of-sight (LOS) channel gain is described in OWC channels. An approximation of this PDF based on the truncated Laplace is proposed and the accuracy of this approximation is confirmed by the Kolmogorov-Smirnov distance (KSD). Moreover, the statistics of the LOS channel gain are calculated and the random orientation of a user equipment (UE) is modeled as a random process. The influence of random orientation on signal-to-noise-ratio (SNR) performance of OWC systems has been evaluated. Finally, an orientation-based random waypoint (ORWP) mobility model is proposed by considering the random orientation of the UE during the user’s movement. The performance of ORWP is assessed on the handover rate and it is shown that it is important to take the random orientation into account.
关键词： Laplace distribution,Optical wireless communications,light-fidelity (LiFi),receiver rotation,fading,device orientation,random waypoint
更新于2025-09-11 14:15:04