Abstract
In this paper, the effect of channel conditions on the global behavior of a wireless Visible Light Communications (VLC) optical network are studied. It presents a system-level simulator that considers jointly a channel propagation model and the MAC mechanisms to have a realistic description of the network, even in situations where the emitted signal is heavily affected by reflections in any close surface or obstacle. The resulting platform also accurately evaluates both Line-Of-Sight (LOS) and Non-LOS (NLOS) contributions on each node and enables the effective use of Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) schemes as defined by IEEE 802.15.7r1 standard, as well as allows a correct evaluation of lifelike problems such as the effect of hidden nodes. This work shows the necessity of accurately modeling VLC MAC layer performances, taking also into account the physical nature of visible light propagation in indoor scenarios.
Highlights
The development of the Internet of Things (IoT) and wireless sensor networks is currently producing a significant impact on many industries, enabling the integration of valuable real-time information into different kinds of systems
As the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) performance gets impaired by an excessive link range between nodes, it is expected that the throughput decreases
The analysis showed that Scenario 3 had more differences than Scenario 1, but less than Scenario 2 since there is only a single hidden node. These results demonstrate that the network performance metrics are susceptible to be affected by the physical properties of the scenario
Summary
The development of the Internet of Things (IoT) and wireless sensor networks is currently producing a significant impact on many industries, enabling the integration of valuable real-time information into different kinds of systems. These systems are usually based on Radio Frequency (RF) technologies, and their massive integration is progressively saturating the radio spectrum in commercial bands. Some of these industries, concretely those that have ElectroMagnetic. VLC has experienced a steep growth since the first proofs of concept developed by Nakagawa et al in the early 2000s [2], and there are currently two consolidated standards (IEEE 802.15.7r1 [3] and ITU G.9991 [4]) and some task groups working on Optical Wireless Communication (OWC)
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