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All‐optical VPN platform for multisite VLC‐based networks
Author(s) -
Salhi Meriem,
Sliti Maha,
Boudriga Noureddine
Publication year - 2019
Publication title -
transactions on emerging telecommunications technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.366
H-Index - 47
ISSN - 2161-3915
DOI - 10.1002/ett.3532
Subject(s) - computer science , computer network , optical transport network , transmission (telecommunications) , multiplexing , access network , network packet , passive optical network , wavelength division multiplexing , telecommunications , optics , physics , wavelength
Optical networks and, in particular, visible light communication represent a very promising communication medium for future‐generation company networks. The establishment of virtual private networks (VPNs) in these specific distributed networks is a fundamental issue. In this paper, we present an all‐optical VPN platform based on visible light communication small cells on the access side and an optical fiber link on the backbone side. We exploited the security enhancement using the superposition of optical signals encoded using optical code‐division multiplexing codewords specific to each user. Two VPN modes are proposed: transport and tunnel. Even though the transport mode provides a much lower blocking rate as well as transmission performance (lower packet delay), the tunnel mode is advantageous from a security perspective due to the embedded optical code‐division multiple access encoding that it implements. Simulations are carried out for both modes to study the performance and security level provided by the proposed VPN architecture relatively to specific parameters (codeword size and number of simultaneous users).