New venues for IoT supported on visible light communications

• Autor(a) principal: Pandeirada, João Duarte Oliveira
• Data de Publicação: 2019
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10773/29795
• topic: Nanotechnology; Nanonetworks; Molecular communications; snn; stdp; Relay

The IoT consists in giving network connectivity to physical devices and everyday objects by embedding electronics inside them so they can communicate with each other over an established network (commonly the internet). The range of fields in which IoT can be useful is enormous and this results in an exponential increase in the number of devices deployed worldwide. This everincreasing trend in the number of devices that future IoT systems may employ is accompanied by a reduction of their size, volume and cost. Future IoT devices will have a much smaller footprint, lower power consumption, longer operation lifespan and will be deployed in even larger numbers than nowadays. This defines a new and exciting field of research on communications, the Internet of Nano-Things. Nano-scale devices impose a new set of challenges like power constraints, limited computational resources and low complex communication capabilities. Inspired in the efficient way that the brain processes and transports information, this work proposes a novel communication architecture to be used inside nanodevices in order to be compliant with their size and power limitations. The architecture consists in a neural network with relaying and pattern recognition capabilities. The network learns the desired features using STDP, a power efficient and biologically plausible learning method. Considering the previous architecture, devices are assumed to establish a communication network, where each device has the functionality of sensing and relaying information. The nanonetwork should be able to transport information between two endpoints while maintaining the signal integrity. Concerning the communication scheme, optical wireless communications are a promising candidate due to the possibility of very small and sensitive frontend devices .The results section shows the simulation of nanonetworks and evaluates their performance for different topologies and parameters.