Prototipos de redes LTE en base a tecnología de radio definida por software e integración de la tecnología de radio sobre fibra en redes móviles : Análisis de la integración de tecnologías de radio sobre fibra en redes móviles: Caso de estudio técnica UFMC.

Abstract

Cellular communication networks have constantly develop since their first appearance, more than 40 years ago. The desire to improve the performance of future networks has led to the development of new technologies; specifically, Radio over Fiber (RoF) systems join wireless and optical systems.

This project reviews and analyzes theoretical concepts of RoF technology and Universal Filtered Multi-Carrier(UFMC) modulation technique. Both systems were combined in a co-simulation between Matlab and OptSim. Where a link, which acts as a fronthaul of Next Generation Radio Access Network (NG-RAN), was designed and configurated. Specifically, this fronthaul link transmits a radio frequency signal in a passive optical network (PON), for which the symmetric passive optical network technology with 10-Gigabit capacity (XGS-PON); which has a transfer rate of 10 [Gbps] for uplink and downlin. Finally, in order to study the behavior of the link, the modulation scheme was modified to 4-QAM, 16-QAM, 64-QAM and 256-QAM. This change allowed analyzing the optimal link configuration to meet the BER requirement of less than 0.001 and the appropriate EVM value according to the modulation scheme.

The implemented solution achieves the objective of sensitivity in the PON's receiver. Also, the digital filtering of sub-bands in UFMC ensured better system impulse response and higher bandwidth. It provides an appropriate speed to transmit bursts of data with a high transfer rate and low latency; which are essential features for new services in 5G. Furthermore, an advantage of the RoF implementation is the ability to expand the system at low cost and without limitations.