Radio over Fiber Access Networks for Broadband Wireless Communications

2013 ◽  
pp. 235-263 ◽  
Author(s):  
Joaquín Beas ◽  
Gerardo Castañón ◽  
Ivan Aldaya ◽  
Gabriel Campuzano ◽  
Alejandro Aragón-Zavala
Keyword(s):  
Access Network ◽  
High Capacity ◽  
Cost Effective ◽  
Base Station ◽  
Radio Over Fiber ◽  
Access Networks ◽  
Wave Band ◽  
Millimeter Wave Band ◽  
Vehicle Networks ◽  
Optical Distribution

In recent years, considerable attention has been devoted to the merging of Radio over Fiber (RoF) technologies with millimeter-wave-band signal distribution. This type of system has great potential to support secure, cost-effective coverage and high-capacity vehicular/mobile/wireless access for the future provisioning of broadband, interactive, and multimedia services. In this chapter, the authors present an overview of an RoF access networks in the context of in-vehicle networks, with special attention to the figures of merit of the system and the basic enabling technologies for downlink/uplink transmission in the RoF land network, which is divided in three main subsystems: Central Station (CS), Optical Distribution Network (ODN) and Base Station (BS). The chapter first reviews the up-conversion techniques from baseband to mm-waves at the CS, and then the different BS configurations. The work finally applies these concepts to the development of an access network proposal for in-vehicle wireless application.

scholarly journals Evaluation of Interference in Ultra-Dense 5G Radio Access Networks with Beamforming

Telecom IT ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 35-59
Author(s):  
G. Fokin
Keyword(s):  
Radiation Pattern ◽  
Antenna Arrays ◽  
Access Network ◽  
Beam Width ◽  
Base Station ◽  
Access Networks ◽  
Base Stations ◽  
Radio Access Network ◽  
Radio Access Networks ◽  
Radio Access

In this paper, we investigate the dependence of the level of intersystem interference on the beam width of the adaptively formed antenna radiation pattern and the territorial separation of neighboring devices in ultra-dense 5G radio access networks. The results of simulation modeling of a radio access network based on 19 base stations with the parameterization of the antenna array gain by the width of the radiation pattern in the horizontal plane show that when the base station beam is di-rected to the user device and narrowed from 360° to 5°, the level of intrasystem interference decreases by 15 dB compared with the case of omnidirectional antennas. The results of simulation of a radio access network based on 19 three-sector base stations with planar antenna arrays of 64 elements illustrate a significant reduction in the level of interference in comparison with the case of omnidirectional antennas and, in order to obtain zones of a positive signal-to-noise ratio, confirm the need for a territorial separation of neighboring devices by 10–20 % of the range of radio coverage.

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