Flexible and Scalable Radio over Fiber Architecture

Abstract

In this paper, we investigate a scalable Radio over Fiber (RoF) system compliant to 5G fronthauling requirements. The proposed RoF architecture is able to adjust the network resources and capacities to satisfy user demands in terms of service, data rate and bandwidth. The flexibility and the reconfigurability of the proposed topology are provided through the inclusion of flexible network nodes which are at the Central Office (CO), the Remote Node (RN) and the Remote Access Unit (RAU). The centralized management of the RoF system based on a Software Defined Networking (SDN) enables the monitoring of the overhaul RoF system and the reconfiguration of network nodes parameters. The proposed RoF system architecture is designed to support multi-standard operation and mm-wave services. We investigated multi-service operation assuming high speed mm-wave service at 60 GHz besides to conventional wireless services such as WiFi and WiMax. The introduced system is able to operate for different RF bands (2.4, 5.2 and 60 GHz) with various modulation schemas such as BPSK, QPSK, 16QAM and 64QAM, that may be associated to Orthogonal Frequency-Division Multiplexing (OFDM) and multidata rates up to 5 Gbps. To validate the RoF system performances, we have considered the Error Vector Magnitude (EVM) and service constellation as figures of merit at the End User (EU). The simulated results testify the architecture viability.

Analysis of a framework implementation of the transceiver performances for integrating optical technologies and wireless LAN based on OFDM-RoF

“…K=log (sequence length) /log (2) Then, the bits sequence received from the PRBS with an order of k are mapped to the M-QAM constellation, with M=2n and n being the number of bits/symbols. For instance, assume n=2, then, M=4, giving us 4-QAM, and 16-QAM for n=4, and 64-QAM for n=6.…”

“…With the conventional cellular structure, it had been tedious for achieving large capacity, high speed, and wide coverage areas; it will also be difficult to meet the requirements for future IoT, big data, and vehicle network. More attention has been given to the RoF technology due to the current effort in the research and expansion of certain key strategies; the RoF technology works can work in the mmwave band [1][2][3] 4253 combines photon with microwave; it also fully deploys high bandwidth and avoiding electromagnetic interferences attributes of the transmission of optical fiber. The emergence of microwave photonic technology could be beneficial in the transmission rate improvement of the of wireless access network via RoF technology.…”

A Wide and Tri-band Flexible Antennas with Independently Controllable Notch Bands for Sub-6-GHz Communication System

“…Recently, the advancement of the emerging technologies in wireless communication has caused a superfluous of devices connecting to the internet which cannot be managed by the fourth generation of mobile connectivity [1]. Especially with the elaboration of the concept of internet of things (IoT), that predicts the production of more than 20 billion connected devices to the web in the horizon of 2020, all of which will claim a connectivity with a ubiquitous coverage and a huge capacity [2]. This is where the fifth generation of communication (5G) came, for its ability to solve previous mobile generation's issues in term of bandwidth, latency rate, and higher data rate transmission [3].…”