RSOA based Radio over Fibre architectures

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Dr. Gerhátné Udvary Eszter
Department of Broadband Infocommunications and Electromagnetic Theory

There is increasing interest in technologies that will define the next generation (5G) telecommunication standard. The main proposed goals are: at least 100 megabit per second data speed in metropolitan area, reliable service for large number of users, reduced power consumption compared to proceeding standards and under 5 milliseconds end-to-end latency (certain applications will require sub-millisecond latency). To meet these requirements new technical solutions need to be developed and standardized both on physical and protocol levels. One of the most important changes is the usage of millimeter wave frequencies on radio interfaces. Higher frequencies lead to smaller covered areas per radio access unit, thus service providers are interested in lowering device and deployment costs. A potentially applicable instrument of the cost reduction is Radio over Fibre (RoF) technology.

In this paper I am describing the Radio over Fibre technology, with special attention paid to the analogue solutions. I am introducing an optical access network architecture optimized for next generation mobile networks with reflective semiconductor optical amplifier (RSOA) modulator as a central element. After characterizing the relevant devices I am implementing the design in VPI Transmission Maker optical simulation environment. I am evaluating the transmission quality and performance based on data provided by the software and suggesting methods to make it more efficient. At the end of the paper I am listing the latency causes and calculating the overall delay in the analogue system.


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