Mathematical evaluation of context transfer and multicast fast reroute in multicast enabled network mobility management

Internet applications such as web based monitoring; live internet video, online video, video conference, webcam viewing and internet video to TV are highly used in today’s IP communication. The trends of these applications are, that they are played on mobile devices and distributed to many end users. Multicast communication over IP contributes to the end users applications distribution. It has been discovered by a CISCO research that mobile multicast traffic will soon reach zetabyte in 2019. The aim of this paper is to introduce new method that enable multicast in network mobility management. The new method is using context transfer and multicast fast reroute technique. The proposed method is quantitatively evaluated in terms of packet loss and service recovery tim

Distribuição de vídeo para grupos de utilizadores em redes móveis heterogéneas19

The evolutions veri ed in mobile devices capabilities (storage capacity, screen resolution, processor, etc.) over the last years led to a signi cant change in mobile user behavior, with the consumption and creation of multimedia content becoming more common, in particular video tra c. Consequently, mobile operator networks, despite being the target of architectural evolutions and improvements over several parameters (such as capacity, transmission and reception performance, amongst others), also increasingly become more frequently challenged by performance aspects associated to the nature of video tra c, whether by the demanding requirements associated to that service, or by its volume increase in such networks. This Thesis proposes modi cations to the mobile architecture towards a more e cient video broadcasting, de ning and developing mechanisms applicable to the network, or to the mobile terminal. Particularly, heterogeneous networks multicast IP mobility supported scenarios are focused, emphasizing their application over di erent access technologies. The suggested changes are applicable to mobile or static user scenarios, whether it performs the role of receiver or source of the video tra c. Similarly, the de ned mechanisms propose solutions targeting operators with di erent video broadcasting goals, or whose networks have di erent characteristics. The pursued methodology combined an experimental evaluation executed over physical testbeds, with the mathematical evaluation using network simulation, allowing the veri cation of its impact on the optimization of video reception in mobile terminalsA evolução veri cada nas características dos dispositivos moveis (capacidade de armazenamento, resolução do ecrã, processador, etc.) durante os últimos anos levou a uma alteração signi cativa nos comportamentos dos utilizadores, sendo agora comum o consumo e produção de conteúdos multimédia envolvendo terminais móveis, em particular o tráfego vídeo. Consequentemente, as redes de operador móvel, embora tendo também sido alvo constante de evoluções arquitecturais e melhorias em vários parâmetros (tais como capacidade, ritmo de transmissão/recepção, entre outros), vêemse cada vez mais frequentemente desa adas por aspectos de desempenho associados à natureza do tráfego de vídeo, seja pela exigência de requisitos associados a esse serviço, quer pelo aumento do volume do mesmo nesse tipo de redes. Esta Tese propôe alterações à arquitetura móvel para a disseminação de vídeo mais e ciente, de nindo e desenvolvendo mecanismos aplicáveis à rede, ou ao utilizador móvel. Em particular, são focados cenários suportados por IP multicast em redes móveis heterogéneas, isto é, com ênfase na aplicação destes mecanismos sobre diferentes tecnologias de acesso. As alterações sugeridas aplicam-se a cenários de utilizador estático ou móvel, sendo este a fonte ou receptor do tráfego vídeo. Da mesma forma, são propostas soluções tendo em vista operadores com diferentes objectivos de disseminação de vídeo, ou cujas redes têm diferentes características. A metodologia utilizada combinou a avaliação experimental em testbeds físicas com a avaliação matemática em simulações de redes, e permitiu veri car o impacto sobre a optimização da recepção de vídeo em terminais móveisPrograma Doutoral em Telecomunicaçõe

Evaluación de mecanismos de soporte de tráfico multicast con movilidad basada en red

Con el auge actual de Internet y el incremento en el uso de dispositivos móviles ha aumentado el consumo de contenido multimedia, del cual cabe destacar el streaming de vídeo, el vídeo bajo demanda y la IPTV. Muchos de estos servicios hacen uso de Multicast, un método de transmisión de datos a múltiples redes y destinatarios de manera simultánea. Para poder realizar transmisiones de datos multicast hay direcciones IP reservadas, tanto en IPv4 como en IPv6. El funcionamiento de multicast es muy sencillo, el host que quiere recibir tráfico manda un mensaje a su router y se suscribe al grupo multicast (IP dentro de un rango reservado), a partir de ahí el router ya sabe que tiene que enviar el tráfico multicast de ese grupo a ese host en particular. El protocolo multicast en el que nos vamos a centrar es MLD (Multicast Listener Discovery). MLD es una herramienta que utilizan los routers IPv6 para descubrir subscriptores multicast en un enlace directo, es el equivalente a IGMP en IPv4. Se usará la versión más reciente de este protocolo MLDv2. El objetivo final de este Trabajo Fin de Grado es evaluar estos mecanismos de envío de tráfico multicast (MLD), en un escenario real bajo un protocolo de movilidad basado en red (PMIPv6). Para desplegar este escenario se utilizará un prototipo con routers empleando la distribución OpenWRT.With the current boom of Internet and the rising use of mobile devices, the media content consumption has increased, including video streaming, video on demand and IPTV. Many of this services use Multicast. Multicast is a method of sending IP datagrams to a group of interested receivers in a single transmission. To do multicast data transmissions are reserved a range of IP addresses, both in IPv4 and in IPv6. Multicast operation is simple, the host who wants to receive traffic sends a message to its router and it subscribes to the multicast group (IP's reserved range). Then the router knows how to send multicast traffic for that group to that particular host. We are going to focus in the multicast protocol MLD (Multicast Listener Discovery). MLD is tool used by IPv6 routers to discover multicast listeners in a direct link, it is equivalent to IGMP in IPv4. We focus on the latest version of this protocol, MLDv2. The final objective of this Bachelor Thesis is to evaluate this multicast sending mechanisms (MLD), in a real scenario running a network-based mobility management protocol (PMIPv6). To deploy the scenario we will utilize a prototype with routers using a OpenWRT distribution.Ingeniería Telemátic

Progressive introduction of network softwarization in operational telecom networks: advances at architectural, service and transport levels

Technological paradigms such as Software Defined Networking, Network Function Virtualization and Network Slicing are altogether offering new ways of providing services. This process is widely known as Network Softwarization, where traditional operational networks adopt capabilities and mechanisms inherit form the computing world, such as programmability, virtualization and multi-tenancy. This adoption brings a number of challenges, both from the technological and operational perspectives. On the other hand, they provide an unprecedented flexibility opening opportunities to developing new services and new ways of exploiting and consuming telecom networks. This Thesis first overviews the implications of the progressive introduction of network softwarization in operational networks for later on detail some advances at different levels, namely architectural, service and transport levels. It is done through specific exemplary use cases and evolution scenarios, with the goal of illustrating both new possibilities and existing gaps for the ongoing transition towards an advanced future mode of operation. This is performed from the perspective of a telecom operator, paying special attention on how to integrate all these paradigms into operational networks for assisting on their evolution targeting new, more sophisticated service demands.Programa de Doctorado en Ingeniería Telemática por la Universidad Carlos III de MadridPresidente: Eduardo Juan Jacob Taquet.- Secretario: Francisco Valera Pintor.- Vocal: Jorge López Vizcaín