A Proposed Approach to Relay-Base Station Link Design for 5G Radio Access Network

Ali, Razhan Q.; Ameen, Jalal J. Hamad

doi:10.33103/uot.ijccce.25.1.5

	A Proposed Approach to Relay-Base Station Link Design for 5G Radio Access Network
IRAQI JOURNAL OF COMPUTERS, COMMUNICATIONS, CONTROL AND SYSTEMS ENGINEERING
Volume 25, Issue 1, April 2025, Pages 54-67 PDF (1.18 M)
Document Type: Research Paper
DOI: 10.33103/uot.ijccce.25.1.5
Authors
Razhan Q. Ali¹; Jalal J. Hamad Ameen^* ²
¹College of engineering University of Salahaddin, electrical engineering department
²Electrical Eng dept college of engineering university of Salahaddin
Abstract
The fast expansion of 5G technology requires new innovative approaches to resolve challenges with extensive signal degradation and constrained coverage extent as well as interference in high-frequency bands. The proposed research designs a 5G Radio Access Network (RAN) station link using relay stations that combine Dense Wavelength Division Multiplexing (DWDM) and Radio-over-Fiber (RoF) technological frameworks. The proposed system uses a mesh architectural network with 32 fiber-connected relay stations to enable efficient, scalable data transfer as an alternative to conventional star configurations. An OptiSystem simulation demonstrates that signal integrity enhancement occurs through the establishment of a bidirectional transmission medium that combines Erbium-Doped Fiber Amplifiers (EDFAs) with high-stability Continuous Wave (CW) lasers. The communication functions between uplink and downlink depend on Wavelength Division Multiplexing (WDM) multiplexers and demultiplexers to operate smoothly. The design delivers remarkable Signal-to-Noise Ratio (SNR) and Optical Signal-to-Noise Ratio (OSNR) measurements greater than 50 dB, which ensures quality signals transmit with low degradation to demonstrate stable and bidirectional communication. The system optimizes wavelength reuse while ensuring channel isolation and achieves optimum bandwidth utilization, which makes it a potential choice for future mobile networks. The research findings prove that DWDM-RoF is an effective solution to tackle critical 5G network needs through efficient, high-speed, accurate networks, which opens new paths for relay-assisted 5G development while stabilizing networks across different geographic locations.
Keywords
5G; Base Station; RAN; Relay; RoF

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