November 18, 2019

Digital Signal Processing in the Cloud Radio Access Network (C-RAN)

We are still waiting for the real entrance of the multi-core Digital Signal Processing (DSP) into the mobile networks. The reason why we are still waiting for the real breakthrough of virtualized DSP is basically laying in the type of mobile network functions suitable to be located on the multi-core DSP chips, as the high timing requirements are imposed by the rest of the network. This directly depends on which […]
November 18, 2019

Why Should We Process LTE Digital Signal Processing Functions in the Cloud?

In the following post, I will try to explain the importance and interests of the DSP processing in the cloud, including my vision of how it can be done and why it should be enabled. First of all, the processing of the DSP functions currently in the LTE is supported by the BBU (Baseband unit). BBUs are specialized hardware which process baseband signals coming from the RRUs (Radio Remote Units). […]
November 18, 2019

A Brief Introduction into 5G Mobile Network

In this post, I will try to introduce you a little bit better into the upcoming 5G network. In general, the new generation of mobile networks is called 5G and it has a certain improvement in comparison with previous mobile networks. This mobile network is already tested in the real environment scenarios, apart from the laboratory tests, by several companies like Huawei, Samsung, and Vodafone. The main goals of the […]
May 13, 2019

Edge-Caching tackling in 5G.

Wireless data traffic increases due to the growth in the number of pervasive mobile devices, social networking, and resource-intensive applications of end users [1]. This traffic manifests in diverse domains such as the Internet of Things (IoT) [2], Machine-to-Machine (M2M) communications [3], and cloud computing [4]. Considering the different structures of data traffic stemming from these domains, their organizations are vital. Moreover, enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), […]
May 13, 2019

Non-Orthogonal Multiple Access

Non-Orthogonal Multiple Access (NOMA) NOMA is a multiple access technique that has attracted a lot of interest from researchers and is considered a strong candidate for handling many of the requirements of 5G and beyond networks. Multiple access techniques allow multiple users to share the allotted resources in an effective manner. Recent studies categorize these techniques as Orthogonal Multiple Access (OMA) and Non-Orthogonal Multiple Access (NOMA). In OMA, each user can exploit […]
May 13, 2019

Minimizing Latency and Optimizing User Selection for 5G and Beyond Networks

Minimizing Latency and Optimizing User Selection for 5G and Beyond Networks The post below, is an oversimplification of the subject for the benefit of non-technical readers and the general public. Introduction The number of devices with mobile access, emerging with the development of the Internet of Things (IoT), is constantly increasing. At the beginning, the mobile phone was the only type of device that could access and utilise telecommunication networks. […]
May 13, 2019

Caching at the Edge

The tremendous data traffic demand and the arrival of new mobile services will lead to unwieldy traffic congestion in mobile communications networks over the next decade. This situation, which is similar to the one experienced in the Internet network in the 2000s, has established parallelisms between 5G –the future mobile communications generation- and the Internet network, thus paving the way for similar solutions to similar problems. In this context, mainly […]
May 13, 2019

Optimization of Radio Access Networks Architecture for 5G

This post is prepared for non-technical readers and the general public.    Introduction Mobile networks are growing fast and pushed by various applications, demanding lower latency, higher traffic volumes, and ultra-reliable connectivity. This led industry to renew their networks while keeping the costs down in order to meet diversified demands with competitive prizes. The International Telecommunication Union (ITU) categorized 5G mobile network services into three use cases [1]: Enhanced Mobile […]
May 13, 2019

New Waveforms for 5G and Beyond Networks

Introduction The telecommunication industry has experienced enormous growth over the last few decades. It all started when the first generation (1G) of mobile telecommunication standards, which were analog systems, were introduced in the early years of the 1980s. 2G telecommunication systems soon replaced 1G. Compared to 1G, 2G was digitally encrypted, more spectrally efficient and also enabled users to now exchange plain text-based messages with its Short Message Service (SMS). […]
December 20, 2018

Popular Content Caching in 5G and Beyond Mobile Networks

The 5G and beyond network system aims to satisfy the widest range of access and connectivity requirements in the mobile and wireless communications. In addition, it aims at providing an extremely flexible platform offering ubiquitous connectivity for any kind of device and service in the globe. The 5G wireless capability includes massive system capacity, very high data rate everywhere, very low latency, ultra-high reliability and availability, very low operational cost […]
December 20, 2018

Massive MIMO with 3D Beamforming in mmWave Band

Why mmWave? With the increasing heavy traffic due to HD video transmission, virtual reality, Internet of Things (IoTs), it can be predicted that existing 4G LTE will not be enough to meet the demands that networks will face in near future. Hence, 5G technology is just about to replace the existing 4G LTE and hit the market hopefully by 2020. 5G technology will offer a network which will be more […]
December 20, 2018

Novel Radio Access Network Technologies: The Physical Layer point of view

In today’s mobile networks, we are used to having high speed connectivity most of the times. Hence, a natural question is why do we need to invest so much effort and resources in developing new and more advanced techniques? The answer is that the value is shifting from providing high speed connectivity for mainly man-controlled devise, such as smartphones, to enabling the coexistence of a network of things such as […]
December 20, 2018

Improving quality of experience for video streaming

Video accounts for 56% of the current (2017) mobile network traffic and is expected to be responsible for 73% by 2023 [1]. Consequently, optimization concerning video delivery has been gaining more and more interested and is the subject discussed in this article. To adapt to the heterogeneity of networks and the variable available bandwidth, the state of the art in delivering video is the adaptive video streaming (ABR). The delivery […]
December 20, 2018

Modelling the 5G core for low latency scenarios

In mobile communication, simply put, latency is the time user traffic takes to travel between the user mobile smartphone and the service in the network (e.g., a video streaming server). Dependent of the type of application, the less is this time the better is the experience from the user point of view: what if you have to wait 10 seconds for your video to start? You would probably not appreciate […]
December 18, 2018

Network management platforms over loosely-coupled resources of heterogeneous RANs

Network management platforms over loosely-coupled resources of heterogeneous RANs The post below, is an oversimplification of the subject for the benefit of non-technical readers and the general public. Introduction In today’s telecommunication industry, the internal infrastructure of mobile operators comprises of a complex architectural implementation with a large number of hardware elements used to run the network. The picture below is a simplified version of a 5G network showing just […]
December 5, 2018

Splitting Network Functions in 5G

5G networks are expected to support various applications with a high flexibility meeting diversity of requirements in terms of latency, data rates and massive connectivity.   A 5G network function (NF) supply a particular capability to support communication through a 5G network. NFs are normally virtualized, but some functions may need addition of more specialized hardware. NFs can be the functions that are common functions which are essential for all […]
September 19, 2018

Using MBrace for evaluating the network response over a stochastically- posed load set

One of the common ways to evaluate of the robustness of a network infrastructure is to estimate its behavior under a set of conditions that can vary in a non-deterministic way. In order to achieve that, a model that depicts this behavior as a function of the aforementioned load is needed, along with a Monte Carlo analyzer. Such a scenario was implemented using MBrace as a means to familiarize oneself with this […]
September 19, 2018

Applied Machine Learning in Network Optimization

Machine learning for wireless networking has the potential to provide a breakthrough in network management and optimization.This article, details the basic workflow of how the basic workflow model can be applied in the network context. The main phases involve problem formulation, monitoring and data collection, data processing and analysis, model construction, model tuning, model deployment and inference. Although these phases have prominent correlations and inter-dependencies, this workflow provides a high-level […]
September 16, 2018

Data Compression

Distributed source coding (DSC) is a data compression technique that deals with two physically separated but statistically correlated sources which do not communicate with each other [1]. A DSC scheme depends on the basis that the encoding will be separated, but with joint decoding of the dependent sources. Moreover, with the DSC theory, independent encoding can be designed as efficiently as joint encoding. Furthermore, sometimes the correlated source signals are […]
September 16, 2018

3D Beamforming

3D beamforming is being considered as one of the enabling technologies for fifth generation (5G) wireless networks alongside mm-waves with higher bandwidth, massive MIMO, etc. As the current cellular networks deployed so far, it is seen that the antenna elements at the base station (BS) or the access point are arranged along the horizontal axis to cover beam pattern radiation in the horizontal plane. This arrangement is known as 2D […]