A DHCP-based IP address autoconfiguration for MANETs

Mobile Ad hoc Networks (MANETs) are expected to become more and more important in the upcoming years, playing a significant role in 4G networks. In order to enable the deployment of IP services in such networks, IP address autoconfiguration mechanisms are required. Although the ad hoc topic has been a very intense research area, with a plethora of published papers about routing, there is a lack of proposals of address autoconfiguration with enough support from the technical community. This paper presents a mechanism suited for MANETs connected to the Internet, reusing existing and widely deployed address autoconfiguration protocols, such as DHCPv6 and Router Advertisements

Nos gusta correr

Audiovisuales. Entrevista a Araceli Sanchis y Laura Fajardo, miembros de UC3Marathon . Disponible en https://www.youtube.com/watch?v=6l8iVbDPe8M .La Universidad organiza cada curso actividades y cursos deportivos, entre ellos: el atletismo en todas sus variantes. Para conocer mejor cómo se desenvuelven estas actividades, i-3 ha hablado con tres miembros de la asociación para conocer sus experiencias, qué hacen y por qué corren.Contiene: Nos husta correr (p.28-29) .-- UC3Marathon. Impulsar el atletismo (p.30) .-- Entrevista a Araceli Sanchis y Laura Fajardo .-- Crecer como atleta y como persona / Carlos Jesús Bernardos (p.31)

Federation of 5G services using distributed ledger technologies

This paper has been published in the special issue: Mobislice 2019 and Leveraging Advanced Technologies and Tools for Connected Vehicles.Federation of services, as a 5G networks concept, aims to provide orchestration of services across multiple administrative domains. In this paper, we are exploring a solution of applying distributed ledger technologies, precisely the combination of blockchain and smart contracts, to enable highly secure, private, fast and distributed interaction between administrative domains in the federation process. Along with the designed solution, we developed an experimental prototype that requires simple one-time setup and fast simultaneous registration time for multiple administrative domains. Obtained results show single service federation times (without considering the deployment time) of around 5 seconds.This work has been partially funded by the EU H2020 5GROWTH Project (grant no. 856709

Federation in dynamic environments: Can Blockchain be the solution?

Deploying multi-domain network services is be-coming a need for operators. However, achieving that in a real operational environment is not easy and requires the use of federation. Federation is a multi-domain concept that enables the use and orchestration of network services/resources to/from external administrative domains. In this article, we first characterize the federation concept, and involved procedures, to then dive into the challenges that emerge when federation is performed in dynamic environments. To tackle these challenges, we propose the application of Blockchain technology, identifying some associated high-level benefits. Last, we validate our proposed approach by conducting a small experimental scenario using Tendermint, an application-based Blockchain.This work has been partially supported by EC H2020 5GPPP 5Growth project (Grant 856709)

Route optimisation for mobile networks in IPv6 heterogeneous environments

The Internet is evolving towards a more ubiquitous network, accessible anytime, anywhere. Users do not only expect to have Internet access available from fixed locations, such as their home, work, or even at other locations where hotspots are deployed (e.g., cafeterias, hotels, airports, etc), but also at mobile platforms. Internet access from aircrafts and trains is becoming a reality nowadays, starting to be widely offered. While the Network Mobility (NEMO) Basic Support protocol defined by the IETF provides a first mechanism to support moving networks, it presents limited performance, since it requires data traffic to follow a detour route. This has triggered the necessity of the so-called NEMO Route Optimisation support. In this PhD thesis we propose a set of mechanisms that enables Route Optimisation for Mobile Networks in heterogeneous environments. The contribution is twofold: on one hand a generic Route Optimisation solution for NEMO, called MIRON: Mobile IPv6 Route Optimisation for NEMO is proposed. This mechanism enables direct path communication between a node of a mobile network – supporting any kind of node, with and without mobility capabilities – and any other node in the Internet, without requiring any upgrade or modification neither in the Internet nodes nor in the nodes attached to the moving network. On the other hand, given the increasing relevance of vehicular scenarios and the importance of Route Optimisation in car-to-car communications (where the performance degradation is even more severe when a plain Network Mobility solution is used), a second mechanism suited for vehicular environments is proposed. This mechanism, called VARON: Vehicular Ad-hoc Route Optimisation for NEMO, combines in a secure way Network Mobility and Ad-hoc concepts to enable direct communication among neighbouring cars that are able to set-up a Vehicular Ad-hoc Network (VANET). The proposed mechanisms are validated experimentally by means of a Linux implementation and simulations with the OPNET tool. _____________________________________________ Internet está evolucionando hacia una red ubicua, accesible en cualquier momento y desde cualquier lugar. Los usuarios no sólo esperan poder acceder a Internet desde lugares fijos, como sus casas, puestos de trabajo, o incluso otros lugares dónde se han desplegado hotspots (p.e., cafeterías, hoteles, aeropuertos, etc), sino también desde plataformas móviles. La provisión de acceso a Internet en aviones y trenes se está convirtiendo en una realidad actualmente y empieza a ser ampliamente ofrecida. Aunque el protocolo básico de soporte de movilidad de redes definido por el IETF proporciona un primer mecanismo para soportar redes móviles, dicho protocolo presenta un rendimiento limitado, debido a que requiere que el tráfico sea encaminado por una ruta subóptima. Esto ha propiciado la necesidad de lo que se ha dado en llamar soporte de Optimización de Rutas para Redes Móviles. En la presente Tesis Doctoral proponemos un conjunto de mecanismos que hacen posible la optimización de rutas en entornos heterogéneos. La contribución tiene dos vertientes: por un lado, se propone una solución de optimización de rutas genérica, llamada MIRON: Mobile IPv6 Route Optimisation for NEMO. Este mecanismo hace posible la comunicación directa entre un nodo de la red móvil – soportando nodos con o sin capacidades de movilidad – y cualquier otro nodo en Internet, sin requerir ningún cambio, actualización o modificación en los nodos de Internet ni en los nodos conectados a la red móvil. Por otro lado, dada la creciente relevancia de los escenarios vehiculares y la importancia de la optimización de rutas en comunicaciones inter-vehiculares (dónde la degradación en el rendimiento es aún más severa cuando se utiliza una solución no optimizada de movilidad de redes), se propone un segundo mecanismo adecuado para entornos vehiculares. Este mecanismo, llamado VARON: Vehicular Ad-hoc Route Optimisation for NEMO, combina de una forma segura los conceptos de movilidad de redes y redes ad-hoc para hacer posible la comunicación directa entre coches vecinos que son capaces de establecer una red ad-hoc vehicular. Los mecanismos propuestos han sido validados experimentalmente mediante una implementación en Linux y simulaciones empleando la herramienta OPNET

Multi-domain VNF mapping algorithms

5G technologies are taking benefit of the Network Function Virtualization to achieve more flexible deployments. This new paradigm allows the resource sharing between operators in federated environments thanks to the decomposition of services into virtual network functions connected together composing a "service function chain". This work proposes algorithms to solve the placement of such chains in federated multi-domain scenarios satisfying imposed restrictions in terms of resource sharing. Algorithms run on top of an implemented simulator for federated scenarios where multiple operators are involved. Two of our proposed solutions reach O(N) running times in certain scenarios. Our results also show that we achieve acceptance ratios very similar to those obtained using a tabu meta-heuristic implementation.This work has been partially supported by the EU H2020 5G Exchange (5GEx) innovation project (grant no. 671636) and by EU H2020 5G-Transformer Project (grant no. 761536)

Scalable QoS-aware Mobility for Future Mobile Operators

Telecom operators and Internet service providers are heading for a new shift in communications paradigms. The forthcoming convergence of cellular and wireless data networks is often manifested in an “all IP approach” in which all communications are based on an end-to-end IP protocol framework. The approach to network design becomes user and service-centered, so that continuous reachability of mobile users and sustained communication capabilities are default requirements for a prospective architecture. In this article, we describe a network architecture which is able to provide seamless communication mobility, triggered either by the user or by the network, across multiple technologies. The architecture allows for media independent handovers and supports optimized mobility and resource management functions. The main focus of the article is on major technical highlights of mobility and quality-of-service (QoS) management subsystems for converged networks.Publicad

IPv6 Network Mobility

Network Authentication, Authorization, and Accounting has been used since before the days of the Internet as we know it today. Authentication asks the question, “Who or what are you?” Authorization asks, “What are you allowed to do?” And fi nally, accounting wants to know, “What did you do?” These fundamental security building blocks are being used in expanded ways today. The fi rst part of this two-part series focused on the overall concepts of AAA, the elements involved in AAA communications, and highlevel approaches to achieving specifi c AAA goals. It was published in IPJ Volume 10, No. 1[0]. This second part of the series discusses the protocols involved, specifi c applications of AAA, and considerations for the future of AAA

Securing route optimisation in NEMO

Third International Symposium on Modeling and Optimization in Mobile, Ad Hoc,and Wireless Networks. 4-6 April 2005. Riva del Garda, Trentino, ItalyThe network mobility (NEMO) basic support protocol enables mobile networks to change their point of attachment to the Internet, while preserving established sessions of the nodes within the mobile network. When only a nonnested mobile network is considered, the so-called triangle routing is the main problem that should be faced. In mobile IPv6, the route optimisation mechanism solves this problem, and the return routability mechanism aims to limit the security concerns originated because of the route optimisation. Nowadays return routability is considered a weak solution (i.e., based on strong assumptions). In this article we explore different approaches to route optimisation in NEMO and we devise how to adapt some of the terminal mobility solutions to a NEMO environment, where, as we propose, a delegation of signalling rights from the mobile network node to the mobile router is necessary.Publicad

P2P Based Architecture for Global Home Agent Dynamic Discovery in IP Mobility

Mobility in packet networks has become a critical issue in the last years. Mobile IP and the Network Mobility Basic Support Protocol are the IETF proposals to provide mobility. However, both of them introduce performance limitations, due to the presence of an entity (Home Agent) in the communication path. Those problems have been tried to be solved in different ways. A family of solutions has been proposed in order to mitigate those problems by allowing mobile devices to use several geographically distributed Home Agents (thus making shorter the communication path). These techniques require a method to discover a close Home Agent, among those geographically distributed, to the mobile device. This paper proposes a peer-topeer based solution, called Peer-to-Peer Home Agent Network, in order to discover a close Home Agent. The proposed solution is simple, fully global, dynamic and it can be developed in IPv4 and IPv6.No publicad