Evaluation of the Effects of Hidden Node Problems in IEEE 802.15.7 Uplink Performance

Abstract

In the last few years, the increasing use of LEDs in illumination systems has been conducted due to the emergence of Visible Light Communication (VLC) technologies, in which data communication is performed by transmitting through the visible band of the electromagnetic spectrum. In 2011, the Institute of Electrical and Electronics Engineers (IEEE) published the IEEE 802.15.7 standard for Wireless Personal Area Networks based on VLC. Due to limitations in the coverage of the transmitted signal, wireless networks can suffer from the hidden node problems, when there are nodes in the network whose transmissions are not detected by other nodes. This problem can cause an important degradation in communications when they are made by means of the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) access control method, which is used in IEEE 802.15.7 This research work evaluates the effects of the hidden node problem in the performance of the IEEE 802.15.7 standard We implement a simulator and analyze VLC performance in terms of parameters like end-to-end goodput and message loss rate. As part of this research work, a solution to the hidden node problem is proposed, based on the use of idle patterns defined in the standard. Idle patterns are sent by the network coordinator node to communicate to the other nodes that there is an ongoing transmission. The validity of the proposed solution is demonstrated with simulation results.

Visible Light Communication [VLC] and its Applications

“…The layered architecture of VLC system is shown in fig 2 [10]. In IEEE 802.15.7, only two layers [such as PHY and MAC] are defined for simplicity [11].…”

An Optimized Hidden Node Detection Paradigm for Improving the Coverage and Network Efficiency in Wireless Multimedia Sensor Networks

“…However, the work does not address energy efficiency. The Line of Sight Method (LOSM) [ 22 ] is introduced for the wireless personal area network based on visible light communication technology. It handles the issue of the hidden nodes in IEEE 802.15.7 and in particular focuses on QoS parameters such as end-to-end delay, message loss, and goodput.…”

Propuesta Metodológica para Proyectos de Infraestructura Tecnológica en Trabajos de Titulación

“…Los desafíos de una investigación, exigen que tanto los métodos como la metodología sean entendidos y asumidos como herramientas útiles que permiten el abordaje, la comprensión y la argumentación de los problemas de estudio (Aguilera, 2013), situación que puede tornarse compleja al estar frente a múltiples aplicaciones (Martelo et al, 2015) que se suscitan en proyectos de desarrollo tecnológico, debiendo ser aplicables y compatibles con proyectos orientados a tecnologías de telecomunicaciones, redes celulares, comunicación inalámbrica óptica, comunicaciones por satélite, internet y sistemas críticos de infraestructura informática y de almacenamiento; es importante contar con guías de trabajo y procesos para gestionar un campo tan vasto (Ley-Bosch et al, 2016y De Oliveira et al, 2015.…”