|SHEHATA MOHAMED KHALED||Cycle: XXXI |
Tutor: Major Research topic
:Techno-Economic Evaluations of Centralized Radio Access Networks with different RAN Splits
Advisor: TORNATORE MASSIMOAbstract:
The increasing demands for high data-rate services is the main driving force behind the continued evolution of wireless communication technologies, resulting in continuous raise of traffic volumes. To satisfy growing user demands, network capacity has to be increased, which leads to a massive increase in the total Cost of Ownership (TCO) in mobile networks, including Capital Expenditure (CapEx) and Operational Expenditure (OpEx). Hence, optimizing cost and energy consumption becomes a necessity in the field of mobile networks. 5G mobile networks are supposed to accommodate the increasing demand in mobile data providing higher bandwidth, improved data rate, decreased latency. One of the proposed network architectures that promise to address the 5G requirements is the so-called Centralized Radio Access Network (C-RAN). In a traditional Distributed RAN (D-RAN), the base station comprises two modules, the Remote Radio Head (RRH) for transmission and reception of radio signals, and the Baseband Unit (BBU) for baseband signal processing; both are located at the same physical site. Every base station has a dedicated housing facility, which is not shared with other base stations. Subsequently, investment and maintenance costs together with power consumption increase linearly with the number of base stations. Given the rapid growth of traffic demands forecast for the next years, increasing network densification in D-RAN represents a valid solution to address the required network capacity. However, D-RAN does not scale well with the number of base stations, for the reasons aforementioned. New architectures are necessary in order to obtain a scalable solution to limit cost and power consumption while fulfilling increasing traffic demands. C-RAN introduces a valid alternative to traditional D-RAN, since it can provide both scalability, power and cost efficiency. The main idea of C-RAN is that multiple BBUs are placed in a single physical location referred as BBU pool, which is connected to the Remote Radio Heads (RRHs) through an optical transmission network that supports the so called “fronthaul links”, i.e., the links connecting RRHs and BBUs. The centralization allows sharing maintenance costs and power consumption among several digital processing units. In this research, we focus on the evaluation of C-RAN’s techno-economic benefits and performance.
Our research contributions can be summarized as following:
1. Techno-Economic Studies for Centralized Radio Access Networks.
2. Analytical Model for Statistical –Multiplexing Gain Evaluation.
3. Power Model for C-RAN with different RAN splits.