Fuzzy Based Network Assignment and Link‐Switching Analysis in Hybrid OCC/LiFi System

Hasan, Moh. Khalid; Chowdhury, Mostafa Zaman; Shahjalal, Md.; Jang, Yeong Min

doi:10.1155/2018/2870518

Cited by 24 publications

(20 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A fuzzy logic based network assignment and link switching is proposed in [11] for a hybrid WiFi and optical camera based communication (OCC). The fuzzy rules are defined based on the SINR, data rate, instantaneous power and distance requirements.…”

Section: Literature Reviewmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of MAC Frame Slots and Power in Hybrid VLC/RF Networks

et al. 2020

View full text Add to dashboard Cite

Hybrid visible light communication and radio frequency (VLC/RF) networks provide combined benefits of both visible light and radio frequency technologies. This is an eminent technology for providing 5G services in an indoor environment. Because of small coverage range, multiple VLC cells coexist in a close proximity. For efficiently utilizing resources of multiple VLC access points (VLC-APs), a different approach than conventional multi RF-APs based resource allocation schemes is required due to unique characteristics of light. In this paper, we provide an optimized solution for combined power and slot allocation in hybrid VLC/RF networks with the objective of maximizing sum rate for a downlink communication scenario. The resources are optimized on frame by frame basis, instead of per request basis. This frame-based optimization reduces the frequency of optimization and also improves the utilization of the resources. The non-convex problem of joint slot and power allocation is divided into less complex sub problems and solved iteratively. The performance of the joint slot and power allocation (JSPA) scheme has been analyzed for data rate and fairness factor for varying values of network size and minimum quality of service (QoS) requirements. The analysis exhibits on average more than 65% improvement in both fairness factor and average sum rate as compared to single VLC-AP based scheme (SV O RF), in which single VLC-AP is utilized for a user and RF-AP is utilized to offload traffic when VLC resources are not sufficient. Moreover, we propose a hybrid user-centeric and network-centeric (H-Uc/Nc) scheme for slot allocation which entails far less computational complexity. Although, H-Uc/Nc scheme performs inferior to optimized scheme, however, it exhibits much better performance than (SV O RF).

show abstract

Section: Literature Reviewmentioning

confidence: 99%

“…(10) ensures that minimum QoS requirements of each user are satisfied. (11) restricts that maximum allocated slots of every AP must be equal to or less than L f . (12) maintains the limit on the total resources allocated to any user to be less than or equal to L f .…”

Section: Joint Slot and Power Allocation (Jspa) In Downlink Direcmentioning

confidence: 99%

Optimization of MAC Frame Slots and Power in Hybrid VLC/RF Networks

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The asperity of the chip faces and the geometric conditions of the encapsulating lens affect the radiation pattern of the LED. The luminous intensity model is represented by the Lambertian radiant intensity [14,16] which is expressed as…”

Section: Illumination Model For Camera Pixelsmentioning

confidence: 99%

“…2019, 9 FOR PEER REVIEW 4 the LED. The luminous intensity model is represented by the Lambertian radiant intensity [14,16] which is expressed as…”

Section: Illumination Model For Camera Pixelsmentioning

confidence: 99%

Performance Analysis and Improvement of Optical Camera Communication

et al. 2018

Self Cite

View full text Add to dashboard Cite

Optical camera communication (OCC) is a technology in which a camera image sensor is employed to receive data bits sent from a light source. OCC has attracted a lot of research interest in the area of mobile optical wireless communication due to the popularity of smartphones with embedded cameras. Moreover, OCC offers high-performance characteristics, including an excellent signal-to-interference-plus-noise ratio (SINR), high security, low interference, and high stability with respect to varying communication distances. Despite these advantages, OCC suffers from several limitations, the primary of which is the low data rate. In this paper, we provide a comprehensive analysis of the parameters that influence the OCC performance. These parameters include the camera sampling rate, the exposure time, the focal length, the pixel edge length, the transmitter configurations, and the optical flickering rate. In particular, the focus is on enhancing the data rate, SINR, and communication distance, which are the principal factors determining the quality of service experienced by a user. The paper also provides a short survey of modulation schemes used in OCC on the basis of the achieved data rate, communication distance, and possible application scenarios. A theoretical analysis of user satisfaction using OCC is also rendered. Furthermore, we present the simulation results demonstrating OCC performance with respect to variations in the parameters mentioned above, which include the outage probability analysis for OCC.

show abstract

“…Optical wireless communication (OWC) technologies, such as visible light communication (VLC), light fidelity, optical camera communication (OCC), and free-space optical communication, can be utilized as ultra-dense small cell networks and high-capacity backhaul support for 5G and beyond. Additionally, OWC can support high data rates [2] and communication distances within a very short to high range [1,[3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Smartphone Camera-Based Optical Wireless Communication System: Requirements and Implementation Challenges

et al. 2019

Self Cite

View full text Add to dashboard Cite

Visible light and infrared bands of the optical spectrum used for optical camera communication (OCC) are becoming a promising technology nowadays. Researchers are proposing new OCC-based architectures and applications in both indoor and outdoor systems using the embedded cameras on smartphones, with a view to making them user-friendly. Smartphones have useful features for developing applications using the complementary metal-oxide-semiconductor cameras, which can receive data from optical transmitters. However, several challenges have arisen in increasing the capacity and communication range, owing to the limitations of current cameras and implementation complexities. In this paper, we provide a comprehensive analysis of the OCC technology requirements and opportunities using smartphone cameras from an implementation point of view. Furthermore, we demonstrate an OCC system using a low frame rate smartphone camera to particularly analyze the requirements and critical implementation challenges. Also, some possible solutions are provided with a view to improving the overall system capacity, communication distance, and stability.

show abstract

Fuzzy Based Network Assignment and Link‐Switching Analysis in Hybrid OCC/LiFi System

Cited by 24 publications

References 46 publications

Optimization of MAC Frame Slots and Power in Hybrid VLC/RF Networks

Optimization of MAC Frame Slots and Power in Hybrid VLC/RF Networks

Performance Analysis and Improvement of Optical Camera Communication

Smartphone Camera-Based Optical Wireless Communication System: Requirements and Implementation Challenges

Contact Info

Product

Resources

About