Jaime Galán-Jiménez

University of Extremadura | UNEX · Department of Computer Systems and Telematics Engineering

Service Function Chaining (SFC) paradigm improves network capabilities thanks to the support of application-driven-networking, which is realized through the invocation of an ordered set of Service Functions (SFs). The programmability and flexibility provided by emerging technologies such as Software-Defined Networking (SDN) and Network Function Vir...

The advent of the Software Defined Networking (SDN) paradigm represents a great opportunity for the definition of new network management solutions. In this work, we focus on the definition and implementation of a novel technique to solve the Traffic Matrix Assessment (TMA) problem from the perspective of an Internet Service Provider. Since the migr...

Internet adoption continues to rise every year, with approximately 2 billion people in remote regions lacking connectivity, depriving them of essential services like healthcare and distance education. By leveraging the capabilities of Unmanned Aerial Vehicles (UAVs) network architectures, this paper proposes an energy-efficient solution capable of...

In isolated rural areas, the absence of communication infrastructures hamper the maintenance of critical infrastructure by local governments. Hydraulic structures require periodic auscultation to monitor health indicators and identify hazards for rural communities such as floods. However, limited Internet within dam galleries lead to extensive manu...

Yearly, the rates of Internet penetration are on the rise, surpassing 80% in developed nations. Despite this progress, over two billion individuals in rural and low-income regions face a complete absence of Internet access. This lack of connectivity hinders the implementation of vital services like remote healthcare, emergency assistance, distance...

Live video streaming has become one of the main multimedia trends in networks in recent years. Providing Quality of Service (QoS) during live transmissions becomes a challenge due to the stringent requirements for low latency and minimal interruptions. This scenario has led to a high dependence on cloud services, implying a widespread usage of Inte...

Live video streaming has become one of the main multimedia trends in networks in recent years. Providing Quality of Service (QoS) during live transmissions is challenging due to the stringent requirements for low latency and minimal interruptions. This scenario has led to a high dependence on cloud services, implying a widespread usage of Internet...

UAV networks have become a promising approach to provide wireless coverage to regions with limited connectivity. The combination of UAV networks and technologies such as the internet of things (IoT), have resulted in an enhancement in the quality of life of people living in rural areas. Therefore, it is crucial to implement fast, low-complexity, an...

The Internet of Things enhances the quality of life by automating tasks and streamlining human-device interactions. However, manual device management remains time-consuming, especially in multiple or new environments that demand new settings and interactions. Learning systems aid in automating task management, but their learning times hinder person...

The emergence of Digital Twins (DTs) has transformed domains like Industry 4.0 or automotive, enabling advanced insights and predictive maintenance, driving efficiency and innovation. With the evolution towards human-centric domains, such as Industry 5.0 or intelligent vehicles, the need for Human Digital Twins (HDTs), human digital representations...

Federated Learning allows us to train Machine Learning models in a distributed way. This improves users' security and privacy and allows the computational load to be distributed. One of the advantages is the application of these models on low-powerful devices, bringing the processing closer to the devices that generate them, as is pursued with Edge...

The main goal of the Web of Things (WoT) is to improve people’s quality of life by automating tasks and simplifying human–device interactions with ubiquitous systems. However, the management of devices still has to be done manually, which wastes a lot of time as their number increases. Thus, the expected benefits are not achieved. This management o...

Access to the Internet has become a great disruption in society. The possibilities of communication and real-time transmissions have opened a great social, economic and cultural disruption. However, at the same time, these advances have driven a division between the communities which are able to connect to the Internet and those that are not able....

There are contexts where communication with TCP/IP protocol is not possible due to the lack of infrastructure or a reliable and continuous data transmission. In this cases, alternatives such as Opportunistic Networks (OPPNets) are valid. Such challenging conditions are common in rural areas and are a significant obstacle for the deployment of eHeal...

The main goal of Web of Things (WoT) is to improve people’s quality of life by automating tasks and simplifying human-device interactions with ubiquitous systems. However, the management of devices still has to be carried out manually, making it very time-consuming as their number increases. Thus, not reaching the expected benefits. This management...

Nowadays, people’s medical records are crucial when it comes to providing treatments, discovering pathologies, or keeping track of health status. Advances in technology have allowed these records to be increasingly digitized, to the point that they can be consulted by specialists from anywhere. This also allows people to report their health status,...

During last years, huge efforts have been done to reduce the Information and Communication Technology (ICT) sector energy consumption due to its impact on the carbon footprint; in particular, the one coming from networking equipment. Although the irruption of programmable and softwarized networks has open new perspectives to improve the energy-effi...

Software-Defined Networking (SDN) is a paradigm that provides flexibility and programmability to computer networks. By introducing SDN nodes in a legacy IP network topology, network operators can benefit on higher control over the infrastructure. However, this migration is not a fast or straightforward process. Furthermore, to provide an adequate q...

There are contexts where TCP/IP is not suitable for performing data transmission due to long delays, timeouts, network partitioning, and interruptions. In these scenarios, mobile opportunistic networks (MONs) are a valid option, providing asynchronous transmissions in dynamic topologies. These architectures exploit physical encounters and persisten...

Loneliness among ageing people has become a significant issue for society. Its impact on health can even be exacerbated in isolated rural areas. Furthermore, the lack of Internet connection is common for these areas, contributing to such isolation. Considering this, it is important to proactively detect ageing people who experience loneliness. In t...

Software-Defined Networking (SDN) is already a well-established networking paradigm. It has a successful story of implementation in the data center network, while its implementation in telecommunications (Telco) and Internet service provider (ISP) networks Worldwide is an ongoing research and implementation. The bigger paradigm shifts in network op...

The advent of the Internet of Things (IoT) paradigm to intensive domains, such as industry, is a key enabler for the automation of critical, real-world processes. The strict Quality of Service (QoS) requirements of these domains make low-latency computing paradigms, such as fog computing, very attractive for meeting these requirements. Moreover, th...

Internet of Things (IoT) integrates billions of smart devices and keeps growing. IoT technologies play a crucial role in smart applications that improve the quality of life. Likewise, the computational capacity of mobile devices has greatly increased, opening up new possibilities. In many cases, human interaction is necessary for IoT devices to per...

The irruption of the Internet of Things (IoT) has attracted the interest of both the industry and academia for their application in intensive domains, such as healthcare. The strict Quality of Service (QoS) requirements of the next generation of intensive IoT applications requires the QoS to be optimized considering the interplay of three key dimen...

The Internet of Things (IoT) is more present in our daily lives than ever before, turning everyday physical objects into smart devices. However, these devices often need excessive human interaction before reaching their best performance, making them time-consuming and reducing their usability. Nowadays, Artificial Intelligence (AI) techniques are b...

Personal information has become one of the most valuable coins on the Internet. Companies gather a massive amount of data to create rich profiles of their users, trying to understand how they interact with the platform and what are their preferences. However, these profiles do not follow any standard and are usually incomplete in the sense that use...

Today, the benefits of Open Source (OS) Software are clearly established, and many modern software systems build on it. Similarly, the OS movement is also experiencing great advances in areas other than software. This is particularly true in the Consumer Electronics (CE) domain, where an increasingly growing number of systems are based not only on...

The Internet of Things (IoT) paradigm offers applications the potential of automating real-world processes. Applying IoT to intensive domains comes with strict quality of service (QoS) requirements, such as very short response times. To achieve these goals, the first option is to distribute the computational workload throughout the infrastructure (...

Network failures can significantly degrade the network performance in several ways, ranging from experiencing unacceptable delays (e.g., in video conference applications) to leading to significant drops in sales for companies (e.g., airlines tickets purchases). In this paper, we focus on network failures caused by links that are prone to fail due t...

Global population is facing a widespread ageing. In next decades, the increasing percentage of people over sixty-five will be significant, which will impact society in several ways. The health system will be one of the sectors specially involved, exploiting the technology as a perfect allied. However, a big percentage of adults live in rural areas...

The rise of the Internet of Things (IoT) has opened new research lines that focus on applying IoT applications to domains further beyond basic user-grade applications, such as Industry or Healthcare. These domains demand a very high Quality of Service (QoS), mainly a very short response time. In order to meet these demands, some works are evaluatin...

Although the percentage of people living outside a broadband network has more than halved in recent years, around 10% of the global population does not have access to the Internet. This lack of coverage is particularly concentrated in rural and low-income areas, in which the lack of a cost-effective electricity supply is the main barrier to expandi...

Many rural areas along Spain do not have access to the Internet. Despite the huge spread of technology that has taken place during recent years, some rural districts and isolated villages have a lack of proper communication infrastructures. Moreover, these areas and the connected regions are notably experiencing a technological gap. As a consequenc...

The installation of new equipment (Base Stations, BSs) during the planning phase of a cellular network (including 5G BSs) is governed by exposure limits in terms of allowable ElectroMagnetic Field (EMF) levels. The exposure limits can be either defined by i) international bodies (e.g., ICNIRP) or ii) national regulations imposing limits stricter th...

Service Function Chaining (SFC) is an enabling technology to provide end-to-end service differentiation according to specific user requirements. Although emerging technologies such as Software-Defined Networking (SDN) and Network Function Virtualization (NFV) are perfect enablers for SFC, hardware limitation of Ternary-Content Addressable Memories...

The pervasive presence of smartphones has emerged as one of the key elements for sensing people contextual information. Their sensors and communication capabilities can be used to gather a huge amount of data. Such capabilities have made it possible to compose profiles of people by relating different parameters such as time and location. This paper...

Countries are experiencing a global population ageing. It is estimated that the percentage of third age people will notably increase in next decades, implying a difficult challenge to society. Rural areas are the most affected locations by these conditions. Currently, small villages are facing an increasing ageing of population where almost 40% of...

We focus on the problem of managing the energy consumption of a cellular network tailored to cover rural and low-income areas. The considered architecture exploits Unmanned Aerial Vehicles (UAVs) to ensure wireless coverage, as well as Solar Panels (SPs) and batteries installed in a set of ground sites, which provide the energy required to recharge...

The massive amount of traffic required by the emerging Internet of Things (IoT) paradigm can be supported by the imminent arrival of 5G next-generation networks. However, the limited capacity of resources in IoT nodes, e.g., battery lifetime or buffer space, opens a challenge to be taken into account when proposing new routing solutions on IoT scen...

The installation of Base Station (BS) sites is regulated by a variety of laws, at international, national, and local levels. While international regulations are already severe, the national and local laws applied in many countries and regions follow precautionary principles, and enforce ElectroMagnetic Field (EMF) constraints that are even more res...