Required Specification Analysis of Radio over Fiber system for LTE-Advanced Fronthaul link

Abstract

Since smart phones are widely used globally, the demand for high-speed mobile communications are increasing. To accommodate the increased communication demand, the next-generation mobile communication services such as LTE-Advanced are deployed. In the LTE-Advanced base stations, the base station schemes of Digital Unit (DU) and Radio Unit (RU) are widely used. Here, the link between DU and RU is called fronthaul link. In the current fronthaul link, a digital optical communication interface is used, which is called Common Public Radio Interface (CPRI). However, the CPRI link cannot support the increased mobile traffic efficiently. Therefore, in this paper, we investigate an alternative technology based on the Radio over Fiber (RoF) to accommodate the increased mobile traffic economically.

A Survey of IEEE 1588 Time Synchronization Performance

“…The accuracy requirement of the time synchronization could be varies dependent on the network technology itself. table 1 shows time synchronization requirements in many wireless networks in term of the phase accuracy and frequency accuracy [4], [5]. In some research literatures such as [6] and [7] femtocell network synchronization have been discussed.…”