Jordi Ortiz

• PhD
• Researcher at University of Murcia

In the rapidly evolving landscape of telecommunications, the integration of commercial 5G solutions and the rise of edge computing have reshaped service delivery, emphasizing the customization of requirements through network slices. However, the heterogeneity of devices and technologies in 5G and beyond networks poses significant challenges, partic...

Research on vehicle-to-everything (V2X) is attracting significant attention nowadays, driven by the recent advances in beyond-5G (B5G) networks and the multi-access edge computing (MEC) paradigm. However, the inherent heterogeneity of B5G combined with the security vulnerabilities of MEC infrastructure in dynamic V2X scenarios introduces unpreceden...

A great lack of 5G design is the traditional bottom-up development of network evolution, which has not effectively considered the requirements of applications and, particularly, vehicle to everything (V2X) applications. This paper provides a service-centric approach towards 6G V2X, with a concise overview of the upcoming hyper-connected vehicular e...

Background Gene set enrichment analysis (detecting phenotypic terms that emerge as significant in a set of genes) plays an important role in bioinformatics focused on diseases of genetic basis. To facilitate phenotype-oriented gene set analysis, we developed PhenoExam, a freely available R package for tool developers and a web interface for users,...

5G mobile communications are bringing a plethora of applications that are challenging existing network infrastructures. These services demand a dynamic, flexible and adaptive infrastructure capable of fulfilling the rigorous requirements they need to operate correctly. Another key point is the need of real-time reactions in the architecture configu...

Smart-campuses are an emerging ecosystem that permit to enhance the performance and efficiency of academic facilities. Besides, they are also adopted as research, development, and testing platforms for the integration of novel management and governance mechanisms in complex ICT infrastructures. In this line, they are considered as small smart-city-...

Gene set based phenotype enrichment analysis (detecting phenotypic terms that emerge as significant in a set of genes) can improve the rate of genetic diagnoses amongst other research purposes. To facilitate diverse phenotype analysis, we developed PhenoExam, a freely available R package for tool developers and a web interface for users, which perf...

More and more people are concerned about data privacy and this is applicable to vehicular scenarios in which on-board units (OBU) and user devices are exposed to traceability across different access networks and service domains. General Data Protection Regulation (GDPR) in European countries indicates the way to proceed to guarantee privacy and acc...

The promise of disparate features envisioned by the 3GPP for 5G, such as offering enhanced Mobile Broadband connectivity while providing massive Machine Type Communications likely with very low data rates and maintaining Ultra Reliable Low Latency Communications requirements, create a very challenging environment for protecting the 5G networks them...

Software Defined Network (SDN) and Network Function Virtualization (NFV) are bringing many advantages to optimize and automatize security management at the network edge, enabling the deployment of virtual network security functions (VSFs) in MEC nodes, to strengthen the end-to-end security in IoT environments. The benefits could exploit in mobile M...

The importance of HTTP in today\'s networks isundisputed. As a solution to enhance QoS and enhance scalability CDN networks have been designed and deployed. Recently, anew paradigm known as ICN has been envisioned focusing thenetwork routing on the content itself instead of the geographical attachment of addresses. Software Defined Networkings (SDN...

Delegation of processing tasks to the network has moved from cloud-based schemes to edge computing solutions where nearby servers process requests in a timely manner. Virtualisation technologies have recently given data cloud and network providers the required flexibility to offer such on-demand resources. However, the maintenance of close computin...

Virtualization technologies are key enablers of softwarized 5G networks, and their usage in the vehicular domain can provide flexibility and reliability in real deployments, where mobility and processing needs may be an issue. Next-generation vehicular services, such as the ones in the area of urban mobility and, in general, those interconnecting o...

The increase of Software Defined Networks (SDN) and Network Function Virtualization (NFV) technologies is bringing many security management benefits that can be exploited at the edge of Internet of Things (IoT) networks to deal with cyber-threats. In this sense, this paper presents and evaluates a novel policy-based and cyber-situational awareness...

While satellite or cellular positioning implies dedicated hardware or network infrastructure functions, indoor navigation or novel IoT positioning techniques include flexible storage and computation requirements that can be fulfilled by both end-devices or cloud back-ends.Hybrid positioning systems support the integration of several algorithms and...

Over The Top (OTT) provider detecting bad QoS for their users can not influence on the network by themselves. In the other hand, the Internet Service Providers (ISPs) along the path only see the effect in their own network. The users might agree on reducing a property (e.g., the bandwidth) on contract Service Level Agreements (SLA) with ISP to enha...

This paper proposes a novel policy-based framework to manage Authentication, Authorization and Accounting (AAA) and Channel Protection security functions in IoT networks enabled with Software defined Networks (SDN) and Network Function Virtualization (NFV) technologies. The virtual AAA, including network authenticators, are deployed as VNF dynamica...

Several identity federations with different authentication mechanisms exist in the area of governments and educational institutions. STORK from the European administration side and eduGAIN from research and educational institutions side are the main exponents in their areas. Both federations are investing on harmonizing and integrating their federa...

Since the demand for more bandwidth, agile infrastructures and services grows, it becomes challenging for Service Providers like GEANT to manage the proprietary underlay, while keeping costs low. In such a scenario, Software Defined Networking (SDN), open hardware and open source software prove to be key components to address those challenges. Afte...

GÉANT has recently joined ONOS core members and other affiliated organizations in a working group called “deployments brigade”. The goal of the brigade is to create a SDN open-source software stack based on ONOS that can be deployed by Research Education Networks (RENs) and Operators. After only a few months of work the brigade released non-trivial...

Geant, the pan-European Research and Education Network (REN) is working on a Software-Defined Networking (SDN) solution to improve the provisioning of the Bandwidth on Demand (BoD) service. The SDN-based solution will integrate with the current provisioning tool, AutoBAHN, to add support for OpenFlow domains. One of the main benefits of this approa...

Aware of the benefits that Software-Defined Networking (SDN) can entail for traffic engineered services, the pan-European National Research and Education Network (NREN) Geant has started to work on an SDN-based solution to provide Bandwidth on Demand (BoD) services. The proposed solution relies on a framework called DynPaC, which is able to provide...

Abstract— the goal of this work is to present a case study demonstrator, presenting the field trial experience while extending network connectivity services in the campus, by enabling SDN-based equipment and coexisting with legacy hardware. The demonstrator aims to show the benefits of gradually adopting SDN technologies. This adoption will also im...

The authors propose a federation mechanism between two AAI like eduGAIN and STORK 2.0 through the analysis of differences and the development of a prototype in which a new element is defined to translate and interoperate both worlds. https://tnc15.terena.org/core/presentation/148

The authors propose a federation mechanism between two AAI like eduGAIN and STORK 2.0 through the analysis of differences and the development of a prototype in which a new element is defined to translate and interoperate both worlds. https://tnc15.terena.org/core/presentation/148

This study presents an evaluation of the Stream Transmission Control Protocol (SCTP) for the transport of the scalable video codec (SVC), proposed by MPEG as an extension to H.264/AVC. Both technologies fit together properly. On the one hand, SVC permits to split easily the bitstream into substreams carrying different video layers, each with differ...

In this paper we discuss the experimentation results we obtained from performing video streaming in Internet of Things (IoT) scenarios built on top of Content Centric Networking (CCN) architecture. More precisely, we used the Dynamic Adaptive Streaming over HTTP (DASH) mechanism to split videos into multiple pieces, also offering multiple bit-rates...

In the future, mobile Internet access is expected to be over heterogeneous technologies and with support for dynamic adaptation in order to adjust efficiently to the varying network availability and conditions. To remove the burden of multi-access network management from users and operators, cognitive network management mechanisms may be used for o...

Losses in real-time multimedia communications have a big impact on the quality experienced by users. In wireless networks, some application level mechanism of Forward Error Correction (FEC) is useful to protect the transmission. In order to adjust the configuration of FEC, a model of the packet-level loss process is required. This work proposes a m...

Nowadays, the maturity of Powerline Communication (PLC) technologies enables high-speed Audio/Video (AV) in-home services. However, PLC data networks can have permanent and transient quality reductions. Permanent reductions are a consequence of the signal attenuation due to the powerline extension or infrastructure deficiencies, whereas transient f...

H.264/SVC, the Scalable Video Coding extension of the H.264/AVC video coding standard, features spatial, quality and temporal scalability. Backwards compatibility with legacy decoding devices is maintained through an H.264/AVC compliant base layer, which represents the lowest quality of an H.264/SVC bit-stream. However, it is often desireable to al...

This paper describes the CELTIC project on "Scalable Video Coding Impact on Networks" with the focus of designing a streaming system based on the Scalable Video Coding extension of the H.264/AVC standard. The system is designed to cope with streaming scenarios that can be classified in four use cases: session handover, network congestion, receiver...

H.264/SVC enables runtime-efficient scalability in the spatial, temporal and fidelity dimension. Existing adaptation mechanisms facilitate this to automatically adapt the H.264/ SVC stream to the current usage environment without any user interaction. This paper argues that the Quality of Experience (QoE) of the end user can be enhanced by enabling...