126 research outputs found
Mobile MPLS-TP - Support the mobility of terminal devices
MPLS architecture for transport networks play the significant role in the development of next generation networks, in particular with regard to the guarantee of continuity of communications "end-to-end" through a variety of heterogeneous segments of the telecommunications network. The article presents the concept of Mobile MPLS-TP with the use of OAM channels to support the mobility of users and optimize "Handoff" procedure in a hierarchical network topology
Ethernet - a survey on its fields of application
During the last decades, Ethernet progressively became the most widely used local area networking (LAN) technology. Apart from LAN installations, Ethernet became also attractive for many other fields of application, ranging from industry to avionics, telecommunication, and multimedia. The expanded application of this technology is mainly due to its significant assets like reduced cost, backward-compatibility, flexibility, and expandability. However, this new trend raises some problems concerning the services of the protocol and the requirements for each application. Therefore, specific adaptations prove essential to integrate this communication technology in each field of application. Our primary objective is to show how Ethernet has been enhanced to comply with the specific requirements of several application fields, particularly in transport, embedded and multimedia contexts. The paper first describes the common Ethernet LAN technology and highlights its main features. It reviews the most important specific Ethernet versions with respect to each application field’s requirements. Finally, we compare these different fields of application and we particularly focus on the fundamental concepts and the quality of service capabilities of each proposal
Capacity Improvement and Protection of LTE Network on Ethernet Based Technique
High demands for data rates in mobile communications is the reason for developing broadband wireless access technologies. Long Term Evolution (4G LTE) networks which offer significantly higher data rates and require suitably higher capacity backhaul networks. To prepare for the high data rates usage in 4G LTE, operators are using ethernet services in terms of backhaul connectivity. Protection packet switching developed to anticipated network failure on ethernet based network technology. The failures in the network include the link fails to connect to each network element, the network element fails to transfer the data to the destination, or the quality drops below the standard. In this paper we used two ethernet based technique, namely Ethernet over SDH and MPLS-TP with ring protection to anticipated network failure on these techniques. Furthermore, we measured performance of network by measuring and comparing the throughput, latency and jitter between Ethernet over SDH and MPLS-TP. We used bandwidth capacity 240 Mbps as plant bandwidth link and worked in MIMO 2 2. The results of measurements indicated that MPLS-TP with ring protection is the best technique to enhanced the performance of LTE network
ESTADO DEL ARTE MPLS-TP CONMUTACIÓN MULTIPROTOCOLO MEDIANTE ETIQUETAS - PERFIL DE TRANSPORTE
La creciente demanda en servicios de telecomunicaciones genera la necesidad de desarrollar diferentes modelos de red. En el año 2008, la UIT-T une sinergias con la IETF para desarrollar un protocolo llamado MPLS-TP cuya arquitectura representa el resultado la agregación de la eficiencia en el transporte de paquetes de IP/MPLS con la fiabilidad en el transporte de SONET/SDH. Este trabajo presenta un estado del arte de MPLS-TP donde se plasman los estudios actuales y avances relacionados con ésta tecnología: modelos de arquitectura óptica, modelos de protección en OAM. Además se presenta la estructura, funcionamiento y características que hacen de MPLS-TP una opción para las redes de transporte de siguiente generación. El material de apoyo para el desarrollo de este artículo ha sido obtenido de la base documental de recursos electrónicos con contenido científico de apoyo a la investigación de la Universidad Distrital Francisco José de Caldas
Otimização do processo de comutação em redes de transporte
Mestrado em Engenharia Eletrónica e TelecomunicaçõesNo presente trabalho analisam-se os custos de implementação (CAPEX) de um nó inserido numa rede de transporte. São estudadas tecnologias de comutação de pacotes (MPLS-TP), tecnologias de comutação de circuitos (OTN) e tecnologias de comutação de canais óticos (ROADM). Com estas tecnologias são analisadas três arquiteturas para um nó, e, alterando o tráfego, comparam-se os benefícios e as limitações de cada arquitetura.In the present work, the capital expenditure (CAPEX) related with the implementation of a node in a transport network is analyzed. Technologies with different kind of switching are studied, such as MPLS-TP (packet switching), OTN (circuit switching) and ROADM (optical switching). Three different architectures combining these technologies are considered and, by changing the traffic, a comparison is performed in order to identify the limitations and advantages of each one
Distribuição eficiente de IPTV
Mestrado em Engenharia Electrónica e TelecomunicaçõesAs redes de transporte de telecomunica c~oes foram inicialmente concebidas
para transportar chamadas telef onicas atrav es de tecnologias baseadas
em comuta c~ao de circuitos. A adapta c~ao destas redes para transportar
tr afego de dados apresenta ine ci^encias que contribuem para que as
receitas geradas pelos operadores n~ao acompanhem a largura de banda
fornecida aos clientes. Este facto tem vindo agravar-se com o crescimento
de servi cos como o IPTV, servi co que requer elevada largura de banda,
varia c~ao acentuada da taxa de transmiss~ao e liga c~oes ponto-multiponto.
A tecnologia Ethernet surge como ponto de partida (e chegada, pois
mais de 95% do tr afego de dados e gerado ou tem como destino uma
porta Ethernet [1]) para novas tecnologias de rede de transporte, chamadas
tecnologias Carrier Ethernet. Neste documento e estudada a tecnologia
Ethernet, os requisitos de uma tecnologia Carrier Ethernet e a promissora
tecnologia MPLS-TP, ainda em processo de normaliza c~ao.
Com o prop osito de otimizar a distribui c~ao do servi co IPTV e proposto
um cen ario, onde se veri ca que o recurso a transmiss~ao combinada
de canais unicast e multicast pode resultar num uso mais e ciente dos
recursos da rede.The telecommunication aggregation networks were initially designed to
transport phone calls, using technologies based on circuit switching.
The adaptation of those networks to transport data trafic has some
ineficiencies, which results, that the operator`s revenues do not follow the
bandwidth provided to customers. This fact has become a growing problem
with the development of services such as IPTV, a service which requires
high bandwidth, high transmission rate variation and point-multipoint
connections.
The Ethernet appears as a starting point (and ending as well, since
more than 95 % of the data tra c is generated or is destinated to an
Ethernet port [1]) for new aggregation network's technologies, called
Carrier Ethernet technologies. This paper, presents a study of the Ethernet
technology, requirements for Carrier Ethernet technologies and the promising
MPLS-TP, still in the standardization process.
In order to optimize IPTV service distribution, there is proposed a
scenario, where it was verified that the combined use of unicast and
multicast transmission can result in an eficient use of network resources
Experimental evaluation of SDN-based service provisioning in mobile networks
5G networks will be characterized by their diversity in terms of traffic patterns, multi-tenancy and heterogeneous and stringent traffic requirements. Network softwarization is a key enabler to cope with such management burden, as it provides the ability to control all networking functions through (re)programming, thus providing higher flexibility to meet heterogeneous requirements while keeping deployment and operational costs low. In this article, we aim at experimentally validating how Software Defined Networking (SDN) concepts can greatly simplify network operation in future 5G operator networks. This simplification is achieved by allowing to very easily create and modify network services and thus customize network operation based on the operator’s requirements. The main contribution of this article is to present a prototype of an SDN-based architecture in a real-life test-bed, where we evaluate the associated implementation costs and we confirm through experimentation that novel complex services can be created with relatively low effort.The research leading to these results has been partially performed within the framework of the H2020-ICT-2014-2 projects 5G NORMA and 5G-Crosshaul, and spanish DRONEXT project
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