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A Wireless Optical Backhaul Solution for Optical Attocell Networks

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https://ieeexplore.ieee.org/document/8558716/
Original languageEnglish
Pages (from-to)1-1
JournalIEEE Transactions on Wireless Communications
Early online date4 Dec 2018
DOIs
Publication statusE-pub ahead of print - 4 Dec 2018

Abstract

The problem of backhauling for optical attocell networks has been approached by a number of wired solutions such as in-building power line communication (PLC), Ethernet and optical fiber. In this paper, an alternative solution is proposed based on wireless optical communication in visible light and infrared (IR) bands. A thorough analysis of signalto- interference-plus-noise (SINR) is elaborated for a multi-user optical attocell network based on direct current biased optical orthogonal frequency division multiplexing (DCO-OFDM) and decode-and-forward (DF) relaying, taking into account the effects of inter-backhaul and backhaul-to-access interferences. Inspired by concepts developed for radio frequency (RF) cellular networks, full-reuse visible light (FR-VL) and in-band visible light (IB-VL) bandwidth allocation policies are proposed to realize backhauling in the visible light band. The transmission power is opportunistically minimized to enhance the backhaul power efficiency. For a two-tier FR-VL network, there is a technological challenge due to the limited capacity of the bottleneck backhaul link. The IR band is employed to add an extra degree of freedom for the backhaul capacity. For the IR backhaul system, a power-bandwidth tradeoff formulation is presented. Closed form analytical expressions are derived for the corresponding power control coefficients. Finally, the network sum rate performance is studied using extensive Monte Carlo simulations.

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