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DiffServ-aware MPLS-TE (DS-TE) allows bandwidth reservation for Traffic Classes (TCs) in MPLS-based engineered networks and, as such, improves the basic MPLS-TE model. In DS-TE networks, per-Class quality of service guarantees are provided while being possible to achieve improved network utilization. DS-TE requires the use of a Bandwidth Allocation Model (BAM) that establishes the amount of bandwidth per-Class and any eventual sharing among them. This paper proposes a new bandwidth allocation model (AllocTC-Sharing) in which the higher priority traffic classes are allowed to use non allocated resources of lower priority traffic classes and vice versa. By adopting this "dual sense" allocation strategy for dynamic bandwidth allocation, it is shown that AllocTC-Sharing model preserves bandwidth constraints for traffic classes and improves overall link utilization.

Resumo-Smart gridé uma solução inovadora para as redes elétricas que proporciona uma arquitetura integrada para todos os componentes do sistema, incluindo geração, transmissão, distribuição e usuário. Essa arquiteturaé fortemente baseada em redes de telecomunicações com vantagens inerentes, tais como uma maior eficiência e confiabilidade para o sistema, permitindo a comunicação entre dispositivos inteligentes na rede. Nesse minicurso, são explicitados os principais conceitos e desafios acerca de smart grids e da norma IEC 61850, a qual estabelece um padrão para a interoperabilidade na comunicação. A norma IEC 61850, em conjunto com outros padrões e protocolos,é um dos elementos básicos para o desenvolvimento de um sistema de telecomunicações num estilo smart grid. Entre os desafios discutidos para o desenvolvimento de uma rede de nova geração para as smart grids, destacam-se a segurança, a gerência, o controle, a qualidade de serviço e a migração tecnológica.

The Internet of Things (IoT) is advancing and the adoption of internet-connected devices in everyday use is constantly growing. This increase not only affects the traffic from other sources in the network, but also the communication quality requirements, like Quality of Service (QoS), for the IoT devices and applications. With the rise of dynamic network management and dynamic network programming technologies like Software-Defined Networking (SDN), traffic management and communication quality requirements can be tailored to fit niche use cases and characteristics. We propose a publish/subscribe QoS-aware framework (PSIoT-SDN) that orchestrates IoT traffic and mediates the allocation of network resources between IoT data aggregators and pub/sub consumers. The PSIoT framework allows edge-level QoS control using the features of publish/ subscribe orchestrator at IoT aggregators and, in addition, allows network-level QoS control by incorporating SDN features coupled with a bandwidth allocation model for networkwide IoT traffic management. The integration of the framework with SDN allows it to dynamically react to bandwidth sharing enabled by the SDN controller, resulting in better bandwidth distribution and higher link utilization for IoT traffic.

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