Cost-Effective Mobile Backhaul Network Using Existing ODN of PONs for the 5G Wireless Systems

Abstract

An optical distribution network (ODN) sharing scheme to integrate mobile backhaul networks with the existing passive optical network (PON) systems is proposed and demonstrated. With the ODN sharing scheme, the expense of building new fibers for the next-generation fifth-generation (5G) mobile backhaul networks can be reduced. As many wavelengths are allocated to the already deployed PON systems, there remain limited wavelengths for the mobile backhaul systems. Hence, to efficiently increase the serving cell sites of the 5G systems, spectral-efficient orthogonal frequency-division multiplexing (OFDM) is adopted in the mobile backhaul systems. In order to reduce the latency of the system, adaptive adjustment of the OFDM signals for different transmission distances is averted. The OFDM signals are transmitted only using specific available bandwidth. The available bandwidth for each wavelength is studied according to the power fading relationship between the transmission distances and the chirp induced from signal modulation. A proof-of-concept demonstration experiment has been performed. In our results, 20.17 Gb/s with a bit error rate (BER) lower than 3:8 Â 10 À3 was realized with a split ratio of 256 and a 40-km transmission distance of the PON ODN. Hence, each wavelength can support about 20, six, and two nodes for the IMT-advanced, current Long-Term Evolution-Advanced (LTE-A) systems, and the expected 5G systems, respectively.

5G RAN architecture based on analog radio-over-fiber fronthaul over UDWDM-PON and phased array fed reflector antennas

“…Passive optical networks (PONs) [7] are candidates for being the network to support connections in small cells. Small cells have coverage areas with radius of 10-200 m and the antennas within radiate at power levels compensating for the high path loss [8].…”

Integrated Silicon Photonics Remote Radio Frontend (RRF) for Single-Sideband (SSB) Millimeter-Wave Radio-Over-Fiber (ROF) Systems

“…In the CRAN, the RRH can be made simple and low-cost, facilitating its mass deployment. Existing optical fiber networks can be used to connect the RRHs and BBUs [13], and the BBUs can be migrated away from the cell cites. They can be connected in the core network (known as BBU pool) for resource sharing.…”

Network Architecture of Bidirectional Visible Light Communication and Passive Optical Network

“…Although the fiber-based access networks can provide huge bandwidths, issues still exist of how to distribute the bandwidths to different users flexibly and efficiently. Wireless signal distributions using wireless fidelity (WiFi) and radio-over-fiber (ROF) [6], [7] have been proposed. Recently, optical wireless communication using visible light, known as visible light communication (VLC) [8]- [12], has been considered as another promising means to distribute the wireless data.…”