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Implementation of a 4G/5G Base Station Using the srsRAN Software and the USRP Software Radio Module

Flakowski Wojciech, Krasicki Maciej, Krenz Rafał

Journal of Telecommunications and Information Technology

2023

nr 3

30--40

This article presents the potential applications and scenarios for the implementation of a software-defined radio (SDR) module operating as a base station in 4G/5G networks. The paper presents test configurations of the srsRAN software environment in conjunction with various types of programmable radio modules. Then, the key performance metrics of the mobile telephony system and potential problems that may be encountered while implementing hardware and software layers are presented.

A flexible approach to combating chromatic dispersion in a centralized 5G network

Ilgaz Mehmet Alp, Baliž K. Vuk, Batagelj B.

Opto-Electronics Review

2020

Vol. 28, No. 1

35--42

This article proposes and examines a solution in which the base-station for the fifth generation radio access network is simplified by using a single millimeter-wave oscillator in the central-station and distributing its millimeter-wave signal to the base-stations. The system is designed in such a way that the low-phase-noise signal generated by an opto-electronic oscillator is transmitted from the central-station to multiple base-stations via a passive optical network infrastructure. A novel flexible approach with a single-loop opto-electronic oscillator at the transmitting end and a tunable dispersion-compensation module at the receiving end(s) is proposed to distribute a power-penalty-free millimeter-wave signal in the radio access network. Power-penalty-free signal transmission from 10 MHz up to 45 GHz with an optical length of 20 km is achieved by a combination of a tunable dispersion-compensation module and an optical delay line. In addition, measurements with a fixed modulation frequency of 39 GHz and discretely incrementing optical fiber lengths from 0.625 km to 20 km are shown. Finally, a preliminary idea for an automatically controlled feedback-loop tuning system is proposed as a further research entry point.

Kompleksowe rozwiązania SAT dla abonenckich sieci dostępowych

Ochocki M.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

1998

nr 5

376-379

Przedstawiono kompleksowe rozwiązanie sieci dostępowych "access network" dla operatorów telekomunikacyjnych przy zastosowaniu produktów firmy SAT. Omówiono budowę i możliwe konfiguracje systemu ze szczególnym uwzględnieniem obszarów wiejskich. Opisano rozwiązania radiowych sieci dostępu oraz strukturę światłowodu w pętli z szafkami ulicznymi, ich zalety i zsadę działania.

The article presents complete SAT access network solution for telecom operators. Radio local loop system and fibre in the loop structure including street cabinets dedicated to rural areas are described. Equipment features, advantages and principle of operation are given.