Visible light communication using wavelength division multiplexing for smart spaces

Khan, Talha Ahmed; Tahir, Muhammad; Usman, Ahmad

doi:10.1109/ccnc.2012.6181092

Cited by 24 publications

(17 citation statements)

References 13 publications

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“…When using red, green and blue (RGB) LEDs (figure 1a), a data rate of more than 3.22 Gbps was achieved in [31] through WDMA implementation in a visible light communication (VLC) system. Moreover, another demonstration of a VLC system that used WDMA was reported in [32]. In addition, by using red, yellow, green and blue (RYGB) LDs (figure 1b), the researchers in [5] achieved a data rate of up to 10 Gbps.…”

Section: Literature Review (A) Multiple Access Schemes In Optical Wirmentioning

confidence: 99%

Optimum resource allocation in optical wireless systems with energy-efficient fog and cloud architectures

Alsulami

Alahmadi

Saeed

et al. 2020

Phil. Trans. R. Soc. A.

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Optical wireless communication (OWC) is a promising technology that can provide high data rates while supporting multiple users. The optical wireless (OW) physical layer has been researched extensively, however, less work was devoted to multiple access and how the OW front end is connected to the network. In this paper, an OWC system which employs a wavelength division multiple access (WDMA) scheme is studied, for the purpose of supporting multiple users. In addition, a cloud/fog architecture is proposed for the first time for OWC to provide processing capabilities. The cloud/fog-integrated architecture uses visible indoor light to create high data rate connections with potential mobile nodes. These OW nodes are further clustered and used as fog mini servers to provide processing services through the OW channel for other users. Additional fog-processing units are located in the room, the building, the campus and at the metro level. Further processing capabilities are provided by remote cloud sites. Two mixed-integer linear programming (MILP) models were proposed to numerically study networking and processing in OW systems. The first MILP model was developed and used to optimize resource allocation in the indoor OWC systems, in particular, the allocation of access points (APs) and wavelengths to users, while the second MILP model was developed to optimize the placement of processing tasks in the different fog and cloud nodes available. The optimization of tasks placement in the cloud/fog-integrated architecture was analysed using the MILP models. Multiple scenarios were considered where the mobile node locations were varied in the room and the amount of processing and data rate requested by each OW node was varied. The results help to identify the optimum colour and AP to use for communication for a given mobile node location and OWC system configuration, the optimum location to place processing and the impact of the network architecture. This article is part of the theme issue ‘Optical wireless communication’.

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Section: Literature Review (A) Multiple Access Schemes In Optical Wirmentioning

confidence: 99%

Optimum resource allocation in optical wireless systems with energy-efficient fog and cloud architectures

Alsulami

Alahmadi

Saeed

et al. 2020

Phil. Trans. R. Soc. A.

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“…Penelitian lain dilakukan oleh Khan dan timnya (Khan, Tahir, & Usman, 2012) dimana mereka mengimplementasikan teknologi VLC untuk transmisi sinyal juga. Akan tetapi, sinyal yang dikirimkan memiliki jumlah yang banyak oleh karena itu digunakan metoda Wavelength Division Multiplexing (WDM).…”

Section: Pendahuluanunclassified

Color Filter Identification for Bidirectional Visible Light Communication

2018

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ABSTRAKSaat ini, cahaya tampak dimanfaatkan oleh manusia hanya sebagai penerangan saja. Akan tetapi, beberapa penelitian telah membuktikan bahwa cahaya tampak dapat dimanfaatkan pula pada sistem komunikasi, yang dinamakan Visible Light Communication (VLC). Pada penelitian ini, sebuah metoda menggunakan color filter diidentifikasi dalam mengimplementasikan sistem bidirectional pada teknologi VLC. Dengan adanya penelitian ini, sebuah sistem bidirectional Visible Light Communication (Bi-VLC) dapat diimplementasikan dengan menggunakan color filter tertentu yang dipasangkan pada posisi uplink dan downlink. Sinyal informasi berupa sinyal audio ditansmisikan melalui VLC transmitter (Tx) yang dipasang color filter dan diterima oleh color filter pada VLC receiver (Rx) setelah melalui media cahaya. Pengujian menunjukan bahwa sistem telah dapat melewatkan sinyal pada frekuensi audio dengan jarak maksimum dari sistem adalah 2,3 m. Sedangkan pasangan color filter yang memiliki kinerja paling baik untuk BI-VLC adalah Azure (Tx) dengan Charteuse Green (Rx), Charteuse Green (Tx) dengan Charteuse Green (Rx), dan Rose (Tx) dengan Charteuse Green (Rx).Kata kunci: Bidirectional, Visible Light Communication (VLC), Color Filter, Audio ABSTRACT Currently, visible light are utilized by humans as illumination only. However, several research have proven that visible light can also be used in communication systems, called Visible Light Communication (VLC). In this research, a method of using color filters was identified for bidirectional systems on VLC technology. With this research, a bidirectional Visible Light Communication (Bi-VLC) system can be implemented using a specific color filter paired in uplink and downlink mode. The audio signal as information is transmitted through a VLC transmitter (Tx) installed by a color filter and received by the color filter on the VLC receiver (Rx) after going through the light media. The result shows that the system has been able to pass the signal at the audio frequency with the maximum distance of the system is 2.3 m. While the best performance of color filter pair for BI-VLC is Azure (Tx) with Charteuse Green (Rx), Charteuse Green (Tx) with Charteuse Green (Rx), and Rose (Tx) with Charteuse Green (Rx).

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“…For our numerical simulations, we will use a standard "office environment" arrangement, akin to the ones typically used in similar work [1,21,22,23,24]. However, we have decided to adopt a larger room size than was considered in the above mentioned work, as in our opinion it better fits real-world environments.…”

Section: The Simulated Environmentmentioning

confidence: 99%

“…Visible light communication (VLC) is a wireless optical communication technology through which baseband signals are modulated on the light emitted by an LED: [1] - [3]. The decreasing cost and hence rapid adaptation of LED-based light make VLC a promising communication technique and a significant alternative to radio-based wireless communication.…”

Section: Introductionmentioning

confidence: 99%

The Feasibility of Launching Rogue Transmitter Attacks in Indoor Visible Light Communication Networks

Blinowski

2017

Wireless Pers Commun

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One of the areas in which wireless networks based on visible light communication (VLC) are considered superior to traditional radio-based communication is security. The common slogan summarizing VLC security features is: WYSIWYS-''What You See Is What You Send''. However, especially in the case of infrastructure downlink communication, security with respect to data snooping, jamming and modification must be carefully provided for. This paper examines the physical layer aspects of VLC networks with respect to possible disruptions caused by rogue transmitters. We present the theoretical system model that we use in simulations to evaluate various rogue transmission scenarios in a typical indoor environment. We use estimated bit error rate as a measure of the effectiveness of jamming and rogue data transmission. We find that it is quite easy to disrupt, and in some cases to even hijack legitimate transmission.

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Visible light communication using wavelength division multiplexing for smart spaces

Cited by 24 publications

References 13 publications

Optimum resource allocation in optical wireless systems with energy-efficient fog and cloud architectures

Optimum resource allocation in optical wireless systems with energy-efficient fog and cloud architectures

Color Filter Identification for Bidirectional Visible Light Communication

The Feasibility of Launching Rogue Transmitter Attacks in Indoor Visible Light Communication Networks

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