September 6, 2018

C-RAN functional split in 5G

The C-RAN (Cloud, Centralized, and Co-operative Radio Access Network) architecture, firstly proposed by China Mobile in 2011 [1] will be one of the very important technologies in the 5G. In this network architecture, base station, known as eNodeB within the LTE network architecture, is disaggregated into two parts: the Radio Remote Unit (RRU) and the Base Band Unit (BBU). The separation is enabling different advantages, like the possibility of sharing […]
September 3, 2018

Mobile central office re-architected as a datacenter (M-CORD)

Mobile central office re-architected as a datacenter (M-CORD) is an open source platform enabling 5G mobile networks, which is built on software defined networking (SDN), network function virtualization (NFV) and cloud technologies. It includes virtualized Radio Access Network (RAN) and virtualized evolved packet core (vEPC) to enable mobile edge applications and services. The reference implementation of the M-CORD is based on commodity servers, white-box fabric switches, disaggregated access technologies and open source software providing virtualization […]
September 3, 2018


Radio resource management (RRM) can be seen as a bundle of network optimization functions aimed at efficiently utilizing the limited radio frequency spectrum resources and radio network infrastructure. The main functions may contain: a) radio resource allocation among macrocell and small cells; b) packets scheduling – physical resource block (PRB) allocation for maximizing the cell spectral efficiency and cell throughput; c) link adaptation – adaptive modulation and coding (AMC), and […]
September 3, 2018

Physical-Layer Network Coding

In the current cellular architecture, illustrated in Figure 1, each base stations (BS) only have access to data symbols intended for users in its coverage area. As a result, BSs process user data independently, which result in poor service quality to users at the cell edge. This is mainly due to inter-cell interference caused by the separate processing at each BS. The heterogeneous nature of 5G and beyond systems coupled […]
August 30, 2018

Video delivery in today’s networks

The early stages of video delivery relied on downloading, i.e., the user saves the full video on its computer and then watches it. Content providers (CP) then realized that the user quality of experience (QoE) would be improved if the user could watch parts of the video as soon as it is available in the user equipment (UE), i.e., the video is downloaded and played at the same time (streaming). […]